diff --git a/DipoleShower/Kinematics/DipoleSplittingKinematics.cc b/DipoleShower/Kinematics/DipoleSplittingKinematics.cc
--- a/DipoleShower/Kinematics/DipoleSplittingKinematics.cc
+++ b/DipoleShower/Kinematics/DipoleSplittingKinematics.cc
@@ -1,238 +1,239 @@
// -*- C++ -*-
//
// DipoleSplittingKinematics.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2007 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the DipoleSplittingKinematics class.
//
#include "DipoleSplittingKinematics.h"
#include "Herwig/DipoleShower/Base/DipoleSplittingInfo.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "Herwig/MatrixElement/Matchbox/Phasespace/RandomHelpers.h"
#include <limits>
using namespace Herwig;
DipoleSplittingKinematics::DipoleSplittingKinematics()
: HandlerBase(), theIRCutoff(1.0*GeV),
theXMin(1.e-5), theJacobian(0.0),
theLastPt(0.0*GeV), theLastZ(0.0), theLastPhi(0.0),
theLastEmitterZ(1.0), theLastSpectatorZ(1.0),
theLastSplittingParameters() {}
DipoleSplittingKinematics::~DipoleSplittingKinematics() {}
void DipoleSplittingKinematics::persistentOutput(PersistentOStream & os) const {
os << ounit(theIRCutoff,GeV) << theXMin << theMCCheck;
}
void DipoleSplittingKinematics::persistentInput(PersistentIStream & is, int) {
is >> iunit(theIRCutoff,GeV) >> theXMin >> theMCCheck;
}
void DipoleSplittingKinematics::prepareSplitting(DipoleSplittingInfo& dInfo) {
dInfo.splittingKinematics(this);
if ( lastPt() > IRCutoff() )
dInfo.lastPt(lastPt());
else {
dInfo.lastPt(0.0*GeV);
dInfo.didStopEvolving();
}
dInfo.lastZ(lastZ());
dInfo.lastPhi(lastPhi());
dInfo.lastEmitterZ(lastEmitterZ());
dInfo.lastSpectatorZ(lastSpectatorZ());
dInfo.splittingParameters().resize(lastSplittingParameters().size());
copy(lastSplittingParameters().begin(),lastSplittingParameters().end(),
dInfo.splittingParameters().begin());
}
Energy DipoleSplittingKinematics::generatePt(double r, Energy dScale,
double emX, double specX,
const DipoleIndex& dIndex,
const DipoleSplittingKernel& split,
double& weight) const {
Energy maxPt = ptMax(dScale,emX,specX,dIndex,split);
if ( maxPt <= IRCutoff() ) {
weight = 0.0;
return ZERO;
}
weight *= log(sqr(maxPt/IRCutoff()));
return IRCutoff()*pow(maxPt/IRCutoff(),r);
}
double DipoleSplittingKinematics::ptToRandom(Energy pt, Energy dScale,
double emX, double specX,
const DipoleIndex& dIndex,
const DipoleSplittingKernel& split) const {
Energy maxPt = ptMax(dScale,emX,specX,dIndex,split);
assert(pt >= IRCutoff() && pt <= maxPt);
return log(pt/IRCutoff())/log(maxPt/IRCutoff());
}
double DipoleSplittingKinematics::generateZ(double r, Energy pt, int sampling,
const DipoleSplittingInfo& dInfo,
const DipoleSplittingKernel& split,
double& weight) const {
pair<double,double> zLims = zBoundaries(pt,dInfo,split);
using namespace RandomHelpers;
if ( sampling == FlatZ ) {
pair<double,double> kw = generate(flat(zLims.first,zLims.second),r);
weight *= kw.second;
return kw.first;
}
if ( sampling == OneOverZ ) {
pair<double,double> kw = generate(inverse(0.0,zLims.first,zLims.second),r);
weight *= kw.second;
return kw.first;
}
if ( sampling == OneOverOneMinusZ ) {
pair<double,double> kw = generate(inverse(1.0,zLims.first,zLims.second),r);
weight *= kw.second;
return kw.first;
}
if ( sampling == OneOverZOneMinusZ ) {
pair<double,double> kw = generate(inverse(0.0,zLims.first,zLims.second) +
inverse(1.0,zLims.first,zLims.second),r);
weight *= kw.second;
return kw.first;
}
weight = 0.0;
return 0.0;
}
Lorentz5Momentum DipoleSplittingKinematics::getKt(const Lorentz5Momentum& p1,
const Lorentz5Momentum& p2,
Energy pt,
double phi,
bool spacelike) const {
Lorentz5Momentum P;
if ( !spacelike )
P = p1 + p2;
else
P = p1 - p2;
Energy2 Q2 = abs(P.m2());
Lorentz5Momentum Q =
!spacelike ?
Lorentz5Momentum(ZERO,ZERO,ZERO,sqrt(Q2),sqrt(Q2)) :
Lorentz5Momentum(ZERO,ZERO,sqrt(Q2),ZERO,-sqrt(Q2));
if ( spacelike && Q.z() < P.z() )
Q.setZ(-Q.z());
bool boost =
abs((P-Q).vect().mag2()/GeV2) > 1e-10 ||
abs((P-Q).t()/GeV) > 1e-5;
+ boost &= (P*Q-Q.mass2())/GeV2 > 1e-8;
Lorentz5Momentum inFrame1;
if ( boost )
inFrame1 = p1 + ((P*p1-Q*p1)/(P*Q-Q.mass2()))*(P-Q);
else
inFrame1 = p1;
Energy ptx = inFrame1.x();
Energy pty = inFrame1.y();
Energy q = 2.*inFrame1.z();
Energy Qp = sqrt(4.*(sqr(ptx)+sqr(pty))+sqr(q));
Energy Qy = sqrt(4.*sqr(pty)+sqr(q));
double cPhi = cos(phi);
double sPhi = sqrt(1.-sqr(cPhi));
if ( phi > Constants::pi )
sPhi = -sPhi;
Lorentz5Momentum kt;
if ( !spacelike ) {
kt.setT(ZERO);
kt.setX(pt*Qy*cPhi/Qp);
kt.setY(-pt*(4*ptx*pty*cPhi/Qp+q*sPhi)/Qy);
kt.setZ(2.*pt*(-ptx*q*cPhi/Qp + pty*sPhi)/Qy);
} else {
kt.setT(2.*pt*(ptx*q*cPhi+pty*Qp*sPhi)/(q*Qy));
kt.setX(pt*(Qp*q*cPhi+4.*ptx*pty*sPhi)/(q*Qy));
kt.setY(pt*Qy*sPhi/q);
kt.setZ(ZERO);
}
if ( boost )
kt = kt + ((P*kt-Q*kt)/(P*Q-Q.mass2()))*(P-Q);
kt.setMass(-pt);
kt.rescaleRho();
return kt;
}
// If needed, insert default implementations of virtual function defined
// in the InterfacedBase class here (using ThePEG-interfaced-impl in Emacs).
AbstractClassDescription<DipoleSplittingKinematics> DipoleSplittingKinematics::initDipoleSplittingKinematics;
// Definition of the static class description member.
void DipoleSplittingKinematics::Init() {
static ClassDocumentation<DipoleSplittingKinematics> documentation
("DipoleSplittingKinematics is the base class for dipole splittings "
"as performed in the dipole shower.");
static Parameter<DipoleSplittingKinematics,Energy> interfaceIRCutoff
("IRCutoff",
"The IR cutoff to be used by this splitting kinematics.",
&DipoleSplittingKinematics::theIRCutoff, GeV, 1.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<DipoleSplittingKinematics,double> interfaceXMin
("XMin",
"The minimum momentum fraction for incoming partons",
&DipoleSplittingKinematics::theXMin, 1.0e-5, 0.0, 1.0,
false, false, Interface::limited);
static Reference<DipoleSplittingKinematics,DipoleMCCheck> interfaceMCCheck
("MCCheck",
"[debug option] MCCheck",
&DipoleSplittingKinematics::theMCCheck, false, false, true, true, false);
interfaceMCCheck.rank(-1);
}
diff --git a/MatrixElement/Matchbox/Base/MatchboxMEBase.cc b/MatrixElement/Matchbox/Base/MatchboxMEBase.cc
--- a/MatrixElement/Matchbox/Base/MatchboxMEBase.cc
+++ b/MatrixElement/Matchbox/Base/MatchboxMEBase.cc
@@ -1,1708 +1,1722 @@
// -*- C++ -*-
//
// MatchboxMEBase.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2012 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the MatchboxMEBase class.
//
#include "MatchboxMEBase.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/RefVector.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "ThePEG/PDF/PDF.h"
#include "ThePEG/PDT/PDT.h"
#include "ThePEG/StandardModel/StandardModelBase.h"
#include "ThePEG/Cuts/Cuts.h"
#include "ThePEG/Handlers/StdXCombGroup.h"
#include "ThePEG/EventRecord/SubProcess.h"
#include "Herwig/MatrixElement/Matchbox/Dipoles/SubtractionDipole.h"
#include "Herwig/MatrixElement/Matchbox/Utility/DiagramDrawer.h"
#include "Herwig/MatrixElement/Matchbox/MatchboxFactory.h"
#include "Herwig/Utilities/RunDirectories.h"
#include "Herwig/MatrixElement/ProductionMatrixElement.h"
#include "Herwig/MatrixElement/HardVertex.h"
#include <boost/foreach.hpp>
#include <cctype>
#include <iterator>
using std::ostream_iterator;
using namespace Herwig;
MatchboxMEBase::MatchboxMEBase()
: MEBase(),
theOneLoop(false),
theOneLoopNoBorn(false),
theOneLoopNoLoops(false),
theNoCorrelations(false),
theHavePDFs(false,false), checkedPDFs(false),
theDiagramWeightVerboseDown(10000000000000.),
theDiagramWeightVerboseUp(0.) {}
MatchboxMEBase::~MatchboxMEBase() {}
Ptr<MatchboxFactory>::tptr MatchboxMEBase::factory() const { return theFactory; }
void MatchboxMEBase::factory(Ptr<MatchboxFactory>::tptr f) { theFactory = f; }
Ptr<Tree2toNGenerator>::tptr MatchboxMEBase::diagramGenerator() const { return factory()->diagramGenerator(); }
Ptr<ProcessData>::tptr MatchboxMEBase::processData() const { return factory()->processData(); }
unsigned int MatchboxMEBase::getNLight() const { return factory()->nLight(); }
vector<int> MatchboxMEBase::getNLightJetVec() const { return factory()->nLightJetVec(); }
vector<int> MatchboxMEBase::getNHeavyJetVec() const { return factory()->nHeavyJetVec(); }
vector<int> MatchboxMEBase::getNLightProtonVec() const { return factory()->nLightProtonVec(); }
double MatchboxMEBase::factorizationScaleFactor() const { return factory()->factorizationScaleFactor(); }
double MatchboxMEBase::renormalizationScaleFactor() const { return factory()->renormalizationScaleFactor(); }
bool MatchboxMEBase::fixedCouplings() const { return factory()->fixedCouplings(); }
bool MatchboxMEBase::fixedQEDCouplings() const { return factory()->fixedQEDCouplings(); }
bool MatchboxMEBase::checkPoles() const { return factory()->checkPoles(); }
bool MatchboxMEBase::verbose() const { return factory()->verbose(); }
bool MatchboxMEBase::initVerbose() const { return factory()->initVerbose(); }
void MatchboxMEBase::getDiagrams() const {
if ( diagramGenerator() && processData() ) {
vector<Ptr<Tree2toNDiagram>::ptr> diags;
vector<Ptr<Tree2toNDiagram>::ptr>& res =
processData()->diagramMap()[subProcess().legs];
if ( res.empty() ) {
res = diagramGenerator()->generate(subProcess().legs,orderInAlphaS(),orderInAlphaEW());
}
copy(res.begin(),res.end(),back_inserter(diags));
processData()->fillMassGenerators(subProcess().legs);
if ( diags.empty() )
return;
for ( vector<Ptr<Tree2toNDiagram>::ptr>::iterator d = diags.begin();
d != diags.end(); ++d ) {
add(*d);
}
return;
}
throw Exception()
<< "MatchboxMEBase::getDiagrams() expects a Tree2toNGenerator and ProcessData object.\n"
<< "Please check your setup." << Exception::runerror;
}
Selector<MEBase::DiagramIndex>
MatchboxMEBase::diagrams(const DiagramVector & diags) const {
if ( phasespace() ) {
return phasespace()->selectDiagrams(diags);
}
throw Exception()
<< "MatchboxMEBase::diagrams() expects a MatchboxPhasespace object.\n"
<< "Please check your setup." << Exception::runerror;
return Selector<MEBase::DiagramIndex>();
}
Selector<const ColourLines *>
MatchboxMEBase::colourGeometries(tcDiagPtr diag) const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->haveColourFlows() ) {
if ( matchboxAmplitude()->treeAmplitudes() )
matchboxAmplitude()->prepareAmplitudes(this);
return matchboxAmplitude()->colourGeometries(diag);
}
}
Ptr<Tree2toNDiagram>::tcptr tdiag =
dynamic_ptr_cast<Ptr<Tree2toNDiagram>::tcptr>(diag);
assert(diag && processData());
vector<ColourLines*>& flows = processData()->colourFlowMap()[tdiag];
if ( flows.empty() ) {
list<list<list<pair<int,bool> > > > cflows =
ColourBasis::colourFlows(tdiag);
for ( list<list<list<pair<int,bool> > > >::const_iterator fit =
cflows.begin(); fit != cflows.end(); ++fit ) {
flows.push_back(new ColourLines(ColourBasis::cfstring(*fit)));
}
}
Selector<const ColourLines *> res;
for ( vector<ColourLines*>::const_iterator f = flows.begin();
f != flows.end(); ++f )
res.insert(1.0,*f);
return res;
}
void MatchboxMEBase::constructVertex(tSubProPtr sub, const ColourLines* cl) {
if ( !canFillRhoMatrix() || !factory()->spinCorrelations() )
return;
assert(matchboxAmplitude());
assert(matchboxAmplitude()->colourBasis());
// get the colour structure for the selected colour flow
size_t cStructure =
matchboxAmplitude()->colourBasis()->tensorIdFromFlow(lastXComb().lastDiagram(),cl);
// hard process for processing the spin info
tPVector hard;
hard.push_back(sub->incoming().first);
hard.push_back(sub->incoming().second);
vector<PDT::Spin> out;
for ( size_t k = 0; k < sub->outgoing().size(); ++k ) {
out.push_back(sub->outgoing()[k]->data().iSpin());
hard.push_back(sub->outgoing()[k]);
}
// calculate dummy wave functions to fill the spin info
static vector<VectorWaveFunction> dummyPolarizations;
static vector<SpinorWaveFunction> dummySpinors;
static vector<SpinorBarWaveFunction> dummyBarSpinors;
for ( size_t k = 0; k < hard.size(); ++k ) {
if ( hard[k]->data().iSpin() == PDT::Spin1Half ) {
if ( hard[k]->id() > 0 && k > 1 ) {
SpinorBarWaveFunction(dummyBarSpinors,hard[k],
outgoing, true);
} else if ( hard[k]->id() < 0 && k > 1 ) {
SpinorWaveFunction(dummySpinors,hard[k],
outgoing, true);
} else if ( hard[k]->id() > 0 && k < 2 ) {
SpinorWaveFunction(dummySpinors,hard[k],
incoming, false);
} else if ( hard[k]->id() < 0 && k < 2 ) {
SpinorBarWaveFunction(dummyBarSpinors,hard[k],
incoming, false);
}
}
else if ( hard[k]->data().iSpin() == PDT::Spin1 ) {
VectorWaveFunction(dummyPolarizations,hard[k],
k > 1 ? outgoing : incoming,
k > 1 ? true : false,
hard[k]->data().hardProcessMass() == ZERO);
}
else if (hard[k]->data().iSpin() == PDT::Spin0 ) {
ScalarWaveFunction(hard[k],k > 1 ? outgoing : incoming,
k > 1 ? true : false);
}
else
assert(false);
}
// fill the production matrix element
ProductionMatrixElement pMe(mePartonData()[0]->iSpin(),
mePartonData()[1]->iSpin(),
out);
for ( map<vector<int>,CVector>::const_iterator lamp = lastLargeNAmplitudes().begin();
lamp != lastLargeNAmplitudes().end(); ++lamp ) {
vector<unsigned int> pMeHelicities
= matchboxAmplitude()->physicalHelicities(lamp->first);
pMe(pMeHelicities) = lamp->second[cStructure];
}
// set the spin information
HardVertexPtr hardvertex = new_ptr(HardVertex());
hardvertex->ME(pMe);
if ( sub->incoming().first->spinInfo() )
sub->incoming().first->spinInfo()->productionVertex(hardvertex);
if ( sub->incoming().second->spinInfo() )
sub->incoming().second->spinInfo()->productionVertex(hardvertex);
for ( ParticleVector::const_iterator p = sub->outgoing().begin();
p != sub->outgoing().end(); ++p ) {
if ( (**p).spinInfo() )
(**p).spinInfo()->productionVertex(hardvertex);
}
}
unsigned int MatchboxMEBase::orderInAlphaS() const {
return subProcess().orderInAlphaS;
}
unsigned int MatchboxMEBase::orderInAlphaEW() const {
return subProcess().orderInAlphaEW;
}
void MatchboxMEBase::setXComb(tStdXCombPtr xc) {
MEBase::setXComb(xc);
lastMatchboxXComb(xc);
if ( phasespace() )
phasespace()->setXComb(xc);
if ( scaleChoice() )
scaleChoice()->setXComb(xc);
if ( matchboxAmplitude() )
matchboxAmplitude()->setXComb(xc);
}
double MatchboxMEBase::generateIncomingPartons(const double* r1, const double* r2) {
// shamelessly stolen from PartonExtractor.cc
Energy2 shmax = lastCuts().sHatMax();
Energy2 shmin = lastCuts().sHatMin();
Energy2 sh = shmin*pow(shmax/shmin, *r1);
double ymax = lastCuts().yHatMax();
double ymin = lastCuts().yHatMin();
double km = log(shmax/shmin);
ymax = min(ymax, log(lastCuts().x1Max()*sqrt(lastS()/sh)));
ymin = max(ymin, -log(lastCuts().x2Max()*sqrt(lastS()/sh)));
double y = ymin + (*r2)*(ymax - ymin);
double x1 = exp(-0.5*log(lastS()/sh) + y);
double x2 = exp(-0.5*log(lastS()/sh) - y);
Lorentz5Momentum P1 = lastParticles().first->momentum();
LorentzMomentum p1 = lightCone((P1.rho() + P1.e())*x1, Energy());
p1.rotateY(P1.theta());
p1.rotateZ(P1.phi());
meMomenta()[0] = p1;
Lorentz5Momentum P2 = lastParticles().second->momentum();
LorentzMomentum p2 = lightCone((P2.rho() + P2.e())*x2, Energy());
p2.rotateY(P2.theta());
p2.rotateZ(P2.phi());
meMomenta()[1] = p2;
lastXCombPtr()->lastX1X2(make_pair(x1,x2));
lastXCombPtr()->lastSHat((meMomenta()[0]+meMomenta()[1]).m2());
return km*(ymax - ymin);
}
bool MatchboxMEBase::generateKinematics(const double * r) {
if ( phasespace() ) {
jacobian(phasespace()->generateKinematics(r,meMomenta()));
if ( jacobian() == 0.0 )
return false;
setScale();
logGenerateKinematics(r);
assert(lastMatchboxXComb());
if ( nDimAmplitude() > 0 ) {
amplitudeRandomNumbers().resize(nDimAmplitude());
copy(r + nDimPhasespace(),
r + nDimPhasespace() + nDimAmplitude(),
amplitudeRandomNumbers().begin());
}
if ( nDimInsertions() > 0 ) {
insertionRandomNumbers().resize(nDimInsertions());
copy(r + nDimPhasespace() + nDimAmplitude(),
r + nDimPhasespace() + nDimAmplitude() + nDimInsertions(),
insertionRandomNumbers().begin());
}
return true;
}
throw Exception()
<< "MatchboxMEBase::generateKinematics() expects a MatchboxPhasespace object.\n"
<< "Please check your setup." << Exception::runerror;
return false;
}
int MatchboxMEBase::nDim() const {
if ( lastMatchboxXComb() )
return nDimPhasespace() + nDimAmplitude() + nDimInsertions();
int ampAdd = 0;
if ( matchboxAmplitude() ) {
ampAdd = matchboxAmplitude()->nDimAdditional();
}
int insertionAdd = 0;
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::const_iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
insertionAdd = max(insertionAdd,(**v).nDimAdditional());
}
return nDimBorn() + ampAdd + insertionAdd;
}
int MatchboxMEBase::nDimBorn() const {
if ( lastMatchboxXComb() )
return nDimPhasespace();
if ( phasespace() )
return phasespace()->nDim(diagrams().front()->partons());
throw Exception()
<< "MatchboxMEBase::nDim() expects a MatchboxPhasespace object.\n"
<< "Please check your setup." << Exception::runerror;
return 0;
}
void MatchboxMEBase::setScale() const {
if ( haveX1X2() ) {
lastXCombPtr()->lastSHat((meMomenta()[0]+meMomenta()[1]).m2());
}
Energy2 fcscale = factorizationScale();
Energy2 fscale = fcscale*sqr(factorizationScaleFactor());
Energy2 rscale = renormalizationScale()*sqr(renormalizationScaleFactor());
Energy2 ewrscale = renormalizationScaleQED();
lastXCombPtr()->lastScale(fscale);
lastXCombPtr()->lastCentralScale(fcscale);
+ lastXCombPtr()->lastShowerScale(showerScale());
lastMatchboxXComb()->lastRenormalizationScale(rscale);
if ( !fixedCouplings() ) {
if ( rscale > lastCuts().scaleMin() )
lastXCombPtr()->lastAlphaS(SM().alphaS(rscale));
else
lastXCombPtr()->lastAlphaS(SM().alphaS(lastCuts().scaleMin()));
} else {
lastXCombPtr()->lastAlphaS(SM().alphaS());
}
if ( !fixedQEDCouplings() ) {
lastXCombPtr()->lastAlphaEM(SM().alphaEMME(ewrscale));
} else {
lastXCombPtr()->lastAlphaEM(SM().alphaEMMZ());
}
logSetScale();
}
Energy2 MatchboxMEBase::factorizationScale() const {
if ( scaleChoice() ) {
return scaleChoice()->factorizationScale();
}
throw Exception()
<< "MatchboxMEBase::factorizationScale() expects a MatchboxScaleChoice object.\n"
<< "Please check your setup." << Exception::runerror;
return ZERO;
}
Energy2 MatchboxMEBase::renormalizationScale() const {
if ( scaleChoice() ) {
return scaleChoice()->renormalizationScale();
}
throw Exception()
<< "MatchboxMEBase::renormalizationScale() expects a MatchboxScaleChoice object.\n"
<< "Please check your setup." << Exception::runerror;
return ZERO;
}
Energy2 MatchboxMEBase::renormalizationScaleQED() const {
if ( scaleChoice() ) {
return scaleChoice()->renormalizationScaleQED();
}
return renormalizationScale();
}
+Energy2 MatchboxMEBase::showerScale() const {
+ if ( scaleChoice() ) {
+ return scaleChoice()->showerScale();
+ }
+
+ throw Exception()
+ << "MatchboxMEBase::showerScale() expects a MatchboxScaleChoice object.\n"
+ << "Please check your setup." << Exception::runerror;
+
+ return ZERO;
+
+}
+
void MatchboxMEBase::setVetoScales(tSubProPtr) const {}
bool MatchboxMEBase::havePDFWeight1() const {
if ( checkedPDFs )
return theHavePDFs.first;
theHavePDFs.first =
factory()->isIncoming(mePartonData()[0]) &&
lastXCombPtr()->partonBins().first->pdf();
theHavePDFs.second =
factory()->isIncoming(mePartonData()[1]) &&
lastXCombPtr()->partonBins().second->pdf();
checkedPDFs = true;
return theHavePDFs.first;
}
bool MatchboxMEBase::havePDFWeight2() const {
if ( checkedPDFs )
return theHavePDFs.second;
theHavePDFs.first =
factory()->isIncoming(mePartonData()[0]) &&
lastXCombPtr()->partonBins().first->pdf();
theHavePDFs.second =
factory()->isIncoming(mePartonData()[1]) &&
lastXCombPtr()->partonBins().second->pdf();
checkedPDFs = true;
return theHavePDFs.second;
}
void MatchboxMEBase::getPDFWeight(Energy2 factorizationScale) const {
if ( !havePDFWeight1() && !havePDFWeight2() ) {
lastMEPDFWeight(1.0);
logPDFWeight();
return;
}
double w = 1.;
if ( havePDFWeight1() )
w *= pdf1(factorizationScale);
if ( havePDFWeight2() )
w *= pdf2(factorizationScale);
lastMEPDFWeight(w);
logPDFWeight();
}
double MatchboxMEBase::pdf1(Energy2 fscale, double xEx, double xFactor) const {
assert(lastXCombPtr()->partonBins().first->pdf());
if ( xEx < 1. && lastX1()*xFactor >= xEx ) {
return
( ( 1. - lastX1()*xFactor ) / ( 1. - xEx ) ) *
lastXCombPtr()->partonBins().first->pdf()->xfx(lastParticles().first->dataPtr(),
lastPartons().first->dataPtr(),
fscale == ZERO ? lastScale() : fscale,
xEx)/xEx;
}
return lastXCombPtr()->partonBins().first->pdf()->xfx(lastParticles().first->dataPtr(),
lastPartons().first->dataPtr(),
fscale == ZERO ? lastScale() : fscale,
lastX1()*xFactor)/lastX1()/xFactor;
}
double MatchboxMEBase::pdf2(Energy2 fscale, double xEx, double xFactor) const {
assert(lastXCombPtr()->partonBins().second->pdf());
if ( xEx < 1. && lastX2()*xFactor >= xEx ) {
return
( ( 1. - lastX2()*xFactor ) / ( 1. - xEx ) ) *
lastXCombPtr()->partonBins().second->pdf()->xfx(lastParticles().second->dataPtr(),
lastPartons().second->dataPtr(),
fscale == ZERO ? lastScale() : fscale,
xEx)/xEx;
}
return lastXCombPtr()->partonBins().second->pdf()->xfx(lastParticles().second->dataPtr(),
lastPartons().second->dataPtr(),
fscale == ZERO ? lastScale() : fscale,
lastX2()*xFactor)/lastX2()/xFactor;
}
double MatchboxMEBase::me2() const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->treeAmplitudes() )
matchboxAmplitude()->prepareAmplitudes(this);
double res =
matchboxAmplitude()->me2()*
me2Norm();
return res;
}
throw Exception()
<< "MatchboxMEBase::me2() expects a MatchboxAmplitude object.\n"
<< "Please check your setup." << Exception::runerror;
return 0.;
}
double MatchboxMEBase::largeNME2(Ptr<ColourBasis>::tptr largeNBasis) const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->treeAmplitudes() ) {
largeNBasis->prepare(mePartonData(),false);
matchboxAmplitude()->prepareAmplitudes(this);
}
double res =
matchboxAmplitude()->largeNME2(largeNBasis)*
me2Norm();
return res;
}
throw Exception()
<< "MatchboxMEBase::largeNME2() expects a MatchboxAmplitude object.\n"
<< "Please check your setup." << Exception::runerror;
return 0.;
}
double MatchboxMEBase::finalStateSymmetry() const {
if ( symmetryFactor() > 0.0 )
return symmetryFactor();
double sFactor = 1.;
map<long,int> counts;
cPDVector checkData;
copy(mePartonData().begin()+2,mePartonData().end(),back_inserter(checkData));
cPDVector::iterator p = checkData.begin();
while ( !checkData.empty() ) {
if ( counts.find((**p).id()) != counts.end() ) {
counts[(**p).id()] += 1;
} else {
counts[(**p).id()] = 1;
}
checkData.erase(p);
p = checkData.begin();
continue;
}
for ( map<long,int>::const_iterator c = counts.begin();
c != counts.end(); ++c ) {
if ( c->second == 1 )
continue;
if ( c->second == 2 )
sFactor /= 2.;
else if ( c->second == 3 )
sFactor /= 6.;
else if ( c->second == 4 )
sFactor /= 24.;
}
symmetryFactor(sFactor);
return symmetryFactor();
}
double MatchboxMEBase::me2Norm(unsigned int addAlphaS) const {
// assume that we always have incoming
// spin-1/2 or massless spin-1 particles
double fac = 1./4.;
if ( hasInitialAverage() )
fac = 1.;
double couplings = 1.0;
if ( (orderInAlphaS() > 0 || addAlphaS != 0) && !hasRunningAlphaS() ) {
fac *= pow(lastAlphaS()/SM().alphaS(),double(orderInAlphaS()+addAlphaS));
couplings *= pow(lastAlphaS(),double(orderInAlphaS()+addAlphaS));
}
if ( orderInAlphaEW() > 0 && !hasRunningAlphaEW() ) {
fac *= pow(lastAlphaEM()/SM().alphaEMMZ(),double(orderInAlphaEW()));
couplings *= pow(lastAlphaEM(),double(orderInAlphaEW()));
}
lastMECouplings(couplings);
if ( !hasInitialAverage() ) {
if ( mePartonData()[0]->iColour() == PDT::Colour3 ||
mePartonData()[0]->iColour() == PDT::Colour3bar )
fac /= SM().Nc();
else if ( mePartonData()[0]->iColour() == PDT::Colour8 )
fac /= (SM().Nc()*SM().Nc()-1.);
if ( mePartonData()[1]->iColour() == PDT::Colour3 ||
mePartonData()[1]->iColour() == PDT::Colour3bar )
fac /= SM().Nc();
else if ( mePartonData()[1]->iColour() == PDT::Colour8 )
fac /= (SM().Nc()*SM().Nc()-1.);
}
return !hasFinalStateSymmetry() ? finalStateSymmetry()*fac : fac;
}
CrossSection MatchboxMEBase::dSigHatDR() const {
getPDFWeight();
if ( !lastXCombPtr()->willPassCuts() ) {
lastMECrossSection(ZERO);
return lastMECrossSection();
}
double xme2 = me2();
if (factory()->verboseDia()){
double diagweightsum = 0.0;
for ( vector<Ptr<DiagramBase>::ptr>::const_iterator d = diagrams().begin();
d != diagrams().end(); ++d ) {
diagweightsum += phasespace()->diagramWeight(dynamic_cast<const Tree2toNDiagram&>(**d));
}
double piWeight = pow(2.*Constants::pi,(int)(3*(meMomenta().size()-2)-4));
double units = pow(lastSHat() / GeV2, mePartonData().size() - 4.);
bookMEoverDiaWeight(log(xme2/(diagweightsum*piWeight*units)));//
}
if ( xme2 == 0. && !oneLoopNoBorn() ) {
lastMECrossSection(ZERO);
return lastMECrossSection();
}
double vme2 = 0.;
if ( oneLoop() && !oneLoopNoLoops() )
vme2 = oneLoopInterference();
CrossSection res = ZERO;
if ( !oneLoopNoBorn() )
res +=
(sqr(hbarc)/(2.*lastSHat())) *
jacobian()* lastMEPDFWeight() * xme2;
if ( oneLoop() && !oneLoopNoLoops() )
res +=
(sqr(hbarc)/(2.*lastSHat())) *
jacobian()* lastMEPDFWeight() * vme2;
if ( !onlyOneLoop() ) {
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::const_iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
(**v).setXComb(lastXCombPtr());
res += (**v).dSigHatDR();
}
if ( checkPoles() && oneLoop() )
logPoles();
}
double weight = 0.0;
bool applied = false;
for ( vector<Ptr<MatchboxReweightBase>::ptr>::const_iterator rw =
theReweights.begin(); rw != theReweights.end(); ++rw ) {
(**rw).setXComb(lastXCombPtr());
if ( !(**rw).apply() )
continue;
weight += (**rw).evaluate();
applied = true;
}
if ( applied )
res *= weight;
lastMECrossSection(res);
return lastMECrossSection();
}
double MatchboxMEBase::oneLoopInterference() const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->oneLoopAmplitudes() )
matchboxAmplitude()->prepareOneLoopAmplitudes(this);
double res =
matchboxAmplitude()->oneLoopInterference()*
me2Norm(1);
return res;
}
throw Exception()
<< "MatchboxMEBase::oneLoopInterference() expects a MatchboxAmplitude object.\n"
<< "Please check your setup." << Exception::runerror;
return 0.;
}
MatchboxMEBase::AccuracyHistogram::AccuracyHistogram(double low,
double up,
unsigned int nbins)
: lower(low), upper(up),
sameSign(0), oppositeSign(0), nans(0),
overflow(0), underflow(0) {
double step = (up-low)/nbins;
for ( unsigned int k = 1; k <= nbins; ++k )
bins[lower + k*step] = 0.0;
}
void MatchboxMEBase::AccuracyHistogram::book(double a, double b) {
if ( isnan(a) || isnan(b) ||
isinf(a) || isinf(b) ) {
++nans;
return;
}
if ( a*b >= 0. )
++sameSign;
if ( a*b < 0. )
++oppositeSign;
double r = 1.;
if ( abs(a) != 0.0 )
r = abs(1.-abs(b/a));
else if ( abs(b) != 0.0 )
r = abs(b);
if ( log10(r) < lower || r == 0.0 ) {
++underflow;
return;
}
if ( log10(r) > upper ) {
++overflow;
return;
}
map<double,double>::iterator bin =
bins.upper_bound(log10(r));
if ( bin == bins.end() )
return;
bin->second += 1.;
}
void MatchboxMEBase::AccuracyHistogram::dump(const std::string& folder, const std::string& prefix,
const cPDVector& proc) const {
ostringstream fname("");
for ( cPDVector::const_iterator p = proc.begin();
p != proc.end(); ++p )
fname << (**p).PDGName();
ofstream out((folder+"/"+prefix+fname.str()+".dat").c_str());
out << "# same sign : " << sameSign << " opposite sign : "
<< oppositeSign << " nans : " << nans
<< " overflow : " << overflow
<< " underflow : " << underflow << "\n";
for ( map<double,double>::const_iterator b = bins.begin();
b != bins.end(); ++b ) {
map<double,double>::const_iterator bp = b; --bp;
if ( b->second != 0. ) {
if ( b != bins.begin() )
out << bp->first;
else
out << lower;
out << " " << b->first
<< " " << b->second
<< "\n" << flush;
}
}
ofstream gpout((folder+"/"+prefix+fname.str()+".gp").c_str());
gpout << "set terminal png\n"
<< "set xlabel 'accuracy of pole cancellation [decimal places]'\n"
<< "set ylabel 'counts\n"
<< "set xrange [-20:0]\n"
<< "set output '" << prefix << fname.str() << ".png'\n"
<< "plot '" << prefix << fname.str() << ".dat' using (0.5*($1+$2)):3 with linespoints pt 7 ps 1 not";
}
void MatchboxMEBase::AccuracyHistogram::persistentOutput(PersistentOStream& os) const {
os << lower << upper << bins
<< sameSign << oppositeSign << nans
<< overflow << underflow;
}
void MatchboxMEBase::AccuracyHistogram::persistentInput(PersistentIStream& is) {
is >> lower >> upper >> bins
>> sameSign >> oppositeSign >> nans
>> overflow >> underflow;
}
void MatchboxMEBase::logPoles() const {
double res2me = oneLoopDoublePole();
double res1me = oneLoopSinglePole();
double res2i = 0.;
double res1i = 0.;
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::const_iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
res2i += (**v).oneLoopDoublePole();
res1i += (**v).oneLoopSinglePole();
}
if (res2me != 0.0 || res2i != 0.0) epsilonSquarePoleHistograms[mePartonData()].book(res2me,res2i);
if (res1me != 0.0 || res1i != 0.0) epsilonPoleHistograms[mePartonData()].book(res1me,res1i);
}
bool MatchboxMEBase::haveOneLoop() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->haveOneLoop();
return false;
}
bool MatchboxMEBase::onlyOneLoop() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->onlyOneLoop();
return false;
}
bool MatchboxMEBase::isDRbar() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->isDRbar();
return false;
}
bool MatchboxMEBase::isDR() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->isDR();
return false;
}
bool MatchboxMEBase::isCS() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->isCS();
return false;
}
bool MatchboxMEBase::isBDK() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->isBDK();
return false;
}
bool MatchboxMEBase::isExpanded() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->isExpanded();
return false;
}
Energy2 MatchboxMEBase::mu2() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->mu2();
return 0*GeV2;
}
double MatchboxMEBase::oneLoopDoublePole() const {
if ( matchboxAmplitude() ) {
return
matchboxAmplitude()->oneLoopDoublePole()*
me2Norm(1);
}
return 0.;
}
double MatchboxMEBase::oneLoopSinglePole() const {
if ( matchboxAmplitude() ) {
return
matchboxAmplitude()->oneLoopSinglePole()*
me2Norm(1);
}
return 0.;
}
vector<Ptr<SubtractionDipole>::ptr>
MatchboxMEBase::getDipoles(const vector<Ptr<SubtractionDipole>::ptr>& dipoles,
const vector<Ptr<MatchboxMEBase>::ptr>& borns) const {
vector<Ptr<SubtractionDipole>::ptr> res;
// keep track of the dipoles we already did set up
set<pair<pair<pair<int,int>,int>,pair<Ptr<MatchboxMEBase>::tptr,Ptr<SubtractionDipole>::tptr> > > done;
cPDVector rep = diagrams().front()->partons();
int nreal = rep.size();
// now loop over configs
for ( int emitter = 0; emitter < nreal; ++emitter ) {
list<Ptr<SubtractionDipole>::ptr> matchDipoles;
for ( vector<Ptr<SubtractionDipole>::ptr>::const_iterator d =
dipoles.begin(); d != dipoles.end(); ++d ) {
if ( !(**d).canHandleEmitter(rep,emitter) )
continue;
matchDipoles.push_back(*d);
}
if ( matchDipoles.empty() )
continue;
for ( int emission = 2; emission < nreal; ++emission ) {
if ( emission == emitter )
continue;
list<Ptr<SubtractionDipole>::ptr> matchDipoles2;
for ( list<Ptr<SubtractionDipole>::ptr>::const_iterator d =
matchDipoles.begin(); d != matchDipoles.end(); ++d ) {
if ( !(**d).canHandleSplitting(rep,emitter,emission) )
continue;
matchDipoles2.push_back(*d);
}
if ( matchDipoles2.empty() )
continue;
map<Ptr<DiagramBase>::ptr,SubtractionDipole::MergeInfo> mergeInfo;
for ( DiagramVector::const_iterator d = diagrams().begin(); d != diagrams().end(); ++d ) {
Ptr<Tree2toNDiagram>::ptr check =
new_ptr(Tree2toNDiagram(*dynamic_ptr_cast<Ptr<Tree2toNDiagram>::ptr>(*d)));
map<int,int> theMergeLegs;
for ( unsigned int i = 0; i < check->external().size(); ++i )
theMergeLegs[i] = -1;
int theEmitter = check->mergeEmission(emitter,emission,theMergeLegs);
// no underlying Born
if ( theEmitter == -1 )
continue;
SubtractionDipole::MergeInfo info;
info.diagram = check;
info.emitter = theEmitter;
info.mergeLegs = theMergeLegs;
mergeInfo[*d] = info;
}
if ( mergeInfo.empty() )
continue;
for ( int spectator = 0; spectator < nreal; ++spectator ) {
if ( spectator == emitter || spectator == emission )
continue;
list<Ptr<SubtractionDipole>::ptr> matchDipoles3;
for ( list<Ptr<SubtractionDipole>::ptr>::const_iterator d =
matchDipoles2.begin(); d != matchDipoles2.end(); ++d ) {
if ( !(**d).canHandleSpectator(rep,spectator) )
continue;
matchDipoles3.push_back(*d);
}
if ( matchDipoles3.empty() )
continue;
if ( noDipole(emitter,emission,spectator) )
continue;
for ( list<Ptr<SubtractionDipole>::ptr>::const_iterator d =
matchDipoles3.begin(); d != matchDipoles3.end(); ++d ) {
if ( !(**d).canHandle(rep,emitter,emission,spectator) )
continue;
for ( vector<Ptr<MatchboxMEBase>::ptr>::const_iterator b =
borns.begin(); b != borns.end(); ++b ) {
if ( (**b).onlyOneLoop() )
continue;
if ( done.find(make_pair(make_pair(make_pair(emitter,emission),spectator),make_pair(*b,*d)))
!= done.end() )
continue;
// now get to work
(**d).clearBookkeeping();
(**d).factory(factory());
(**d).realEmitter(emitter);
(**d).realEmission(emission);
(**d).realSpectator(spectator);
(**d).realEmissionME(const_cast<MatchboxMEBase*>(this));
(**d).underlyingBornME(*b);
(**d).setupBookkeeping(mergeInfo);
if ( !((**d).empty()) ) {
res.push_back((**d).cloneMe());
Ptr<SubtractionDipole>::tptr nDipole = res.back();
done.insert(make_pair(make_pair(make_pair(emitter,emission),spectator),make_pair(*b,*d)));
if ( nDipole->isSymmetric() )
done.insert(make_pair(make_pair(make_pair(emission,emitter),spectator),make_pair(*b,*d)));
ostringstream dname;
dname << fullName() << "." << (**b).name() << "."
<< (**d).name() << ".[("
<< emitter << "," << emission << ")," << spectator << "]";
if ( ! (generator()->preinitRegister(nDipole,dname.str()) ) )
throw Exception() << "MatchboxMEBase::getDipoles(): Dipole " << dname.str() << " already existing." << Exception::runerror;
if ( !factory()->reweighters().empty() ) {
for ( vector<ReweightPtr>::const_iterator rw = factory()->reweighters().begin();
rw != factory()->reweighters().end(); ++rw )
nDipole->addReweighter(*rw);
}
if ( !factory()->preweighters().empty() ) {
for ( vector<ReweightPtr>::const_iterator rw = factory()->preweighters().begin();
rw != factory()->preweighters().end(); ++rw )
nDipole->addPreweighter(*rw);
}
nDipole->cloneDependencies(dname.str());
}
}
}
}
}
}
vector<Ptr<SubtractionDipole>::tptr> partners;
copy(res.begin(),res.end(),back_inserter(partners));
for ( vector<Ptr<SubtractionDipole>::ptr>::iterator d = res.begin();
d != res.end(); ++d )
(**d).partnerDipoles(partners);
return res;
}
double MatchboxMEBase::colourCorrelatedME2(pair<int,int> ij) const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->treeAmplitudes() )
matchboxAmplitude()->prepareAmplitudes(this);
double res =
matchboxAmplitude()->colourCorrelatedME2(ij)*
me2Norm();
return res;
}
throw Exception()
<< "MatchboxMEBase::colourCorrelatedME2() expects a MatchboxAmplitude object.\n"
<< "Please check your setup." << Exception::runerror;
return 0.;
}
double MatchboxMEBase::largeNColourCorrelatedME2(pair<int,int> ij,
Ptr<ColourBasis>::tptr largeNBasis) const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->treeAmplitudes() ) {
largeNBasis->prepare(mePartonData(),false);
matchboxAmplitude()->prepareAmplitudes(this);
}
double res =
matchboxAmplitude()->largeNColourCorrelatedME2(ij,largeNBasis)*
me2Norm();
return res;
}
throw Exception()
<< "MatchboxMEBase::largeNColourCorrelatedME2() expects a MatchboxAmplitude object.\n"
<< "Please check your setup." << Exception::runerror;
return 0.;
}
double MatchboxMEBase::spinColourCorrelatedME2(pair<int,int> ij,
const SpinCorrelationTensor& c) const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->treeAmplitudes() )
matchboxAmplitude()->prepareAmplitudes(this);
double res =
matchboxAmplitude()->spinColourCorrelatedME2(ij,c)*
me2Norm();
return res;
}
throw Exception()
<< "MatchboxMEBase::spinColourCorrelatedME2() expects a MatchboxAmplitude object.\n"
<< "Please check your setup." << Exception::runerror;
return 0.;
}
double MatchboxMEBase::spinCorrelatedME2(pair<int,int> ij,
const SpinCorrelationTensor& c) const {
if ( matchboxAmplitude() ) {
if ( matchboxAmplitude()->treeAmplitudes() )
matchboxAmplitude()->prepareAmplitudes(this);
double res =
matchboxAmplitude()->spinCorrelatedME2(ij,c)*
me2Norm();
return res;
}
throw Exception()
<< "MatchboxMEBase::spinCorrelatedME2() expects a MatchboxAmplitude object.\n"
<< "Please check your setup." << Exception::runerror;
return 0.;
}
void MatchboxMEBase::flushCaches() {
MEBase::flushCaches();
if ( matchboxAmplitude() )
matchboxAmplitude()->flushCaches();
for ( vector<Ptr<MatchboxReweightBase>::ptr>::iterator r =
reweights().begin(); r != reweights().end(); ++r ) {
(**r).flushCaches();
}
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::const_iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
(**v).flushCaches();
}
}
void MatchboxMEBase::print(ostream& os) const {
os << "--- MatchboxMEBase setup -------------------------------------------------------\n";
os << " '" << name() << "' for subprocess:\n";
os << " ";
for ( PDVector::const_iterator pp = subProcess().legs.begin();
pp != subProcess().legs.end(); ++pp ) {
os << (**pp).PDGName() << " ";
if ( pp == subProcess().legs.begin() + 1 )
os << "-> ";
}
os << "\n";
os << " including " << (oneLoop() ? "" : "no ") << "virtual corrections";
if ( oneLoopNoBorn() )
os << " without Born contributions";
if ( oneLoopNoLoops() )
os << " without loop contributions";
os << "\n";
if ( oneLoop() && !onlyOneLoop() ) {
os << " using insertion operators\n";
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::const_iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
os << " '" << (**v).name() << "' with "
<< ((**v).isDR() ? "" : "C") << "DR/";
if ( (**v).isCS() )
os << "CS";
if ( (**v).isBDK() )
os << "BDK";
if ( (**v).isExpanded() )
os << "expanded";
os << " conventions\n";
}
}
os << "--------------------------------------------------------------------------------\n";
os << flush;
}
void MatchboxMEBase::printLastEvent(ostream& os) const {
os << "--- MatchboxMEBase last event information --------------------------------------\n";
os << " for matrix element '" << name() << "'\n";
os << " process considered:\n ";
int in = 0;
for ( cPDVector::const_iterator p = mePartonData().begin();
p != mePartonData().end(); ++p ) {
os << (**p).PDGName() << " ";
if ( ++in == 2 )
os << " -> ";
}
os << " kinematic environment as set by the XComb " << lastXCombPtr() << ":\n"
<< " sqrt(shat)/GeV = " << sqrt(lastSHat()/GeV2)
<< " x1 = " << lastX1() << " x2 = " << lastX2()
<< " alphaS = " << lastAlphaS() << "\n";
os << " momenta/GeV generated from random numbers\n ";
copy(lastXComb().lastRandomNumbers().begin(),
lastXComb().lastRandomNumbers().end(),ostream_iterator<double>(os," "));
os << ":\n ";
for ( vector<Lorentz5Momentum>::const_iterator p = meMomenta().begin();
p != meMomenta().end(); ++p ) {
os << (*p/GeV) << "\n ";
}
os << "last cross section/nb calculated was:\n "
<< (lastMECrossSection()/nanobarn) << " (pdf weight " << lastMEPDFWeight() << ")\n";
os << "--------------------------------------------------------------------------------\n";
os << flush;
}
void MatchboxMEBase::logGenerateKinematics(const double * r) const {
if ( !verbose() )
return;
generator()->log() << "'" << name() << "' generated kinematics\nfrom "
<< nDim() << " random numbers:\n";
copy(r,r+nDim(),ostream_iterator<double>(generator()->log()," "));
generator()->log() << "\n";
generator()->log() << "storing phase space information in XComb "
<< lastXCombPtr() << "\n";
generator()->log() << "generated phase space point (in GeV):\n";
vector<Lorentz5Momentum>::const_iterator pit = meMomenta().begin();
cPDVector::const_iterator dit = mePartonData().begin();
for ( ; pit != meMomenta().end() ; ++pit, ++dit )
generator()->log() << (**dit).PDGName() << " : "
<< (*pit/GeV) << "\n";
generator()->log() << "with x1 = " << lastX1() << " x2 = " << lastX2() << "\n"
<< "and Jacobian = " << jacobian() << " sHat/GeV2 = "
<< (lastSHat()/GeV2) << "\n" << flush;
}
void MatchboxMEBase::logSetScale() const {
if ( !verbose() )
return;
generator()->log() << "'" << name() << "' set scales using XComb " << lastXCombPtr() << ":\n"
<< "scale/GeV2 = " << (scale()/GeV2) << " xi_R = "
<< renormalizationScaleFactor() << " xi_F = "
<< factorizationScaleFactor() << "\n"
<< "alpha_s = " << lastAlphaS() << "\n" << flush;
}
void MatchboxMEBase::logPDFWeight() const {
if ( !verbose() )
return;
generator()->log() << "'" << name() << "' calculated pdf weight = "
<< lastMEPDFWeight() << " from XComb "
<< lastXCombPtr() << "\n"
<< "x1 = " << lastX1() << " (" << (mePartonData()[0]->coloured() ? "" : "not ") << "used) "
<< "x2 = " << lastX2() << " (" << (mePartonData()[1]->coloured() ? "" : "not ") << "used)\n"
<< flush;
}
void MatchboxMEBase::logME2() const {
if ( !verbose() )
return;
generator()->log() << "'" << name() << "' evaluated me2 using XComb "
<< lastXCombPtr() << "\n"
<< "and phase space point (in GeV):\n";
vector<Lorentz5Momentum>::const_iterator pit = meMomenta().begin();
cPDVector::const_iterator dit = mePartonData().begin();
for ( ; pit != meMomenta().end() ; ++pit, ++dit )
generator()->log() << (**dit).PDGName() << " : "
<< (*pit/GeV) << "\n";
generator()->log() << "with x1 = " << lastX1() << " x2 = " << lastX2() << "\n"
<< "sHat/GeV2 = " << (lastSHat()/GeV2) << "\n" << flush;
}
void MatchboxMEBase::logDSigHatDR() const {
if ( !verbose() )
return;
generator()->log() << "'" << name() << "' evaluated cross section using XComb "
<< lastXCombPtr() << "\n"
<< "Jacobian = " << jacobian() << " sHat/GeV2 = "
<< (lastSHat()/GeV2) << " dsig/nb = "
<< (lastMECrossSection()/nanobarn) << "\n" << flush;
}
void MatchboxMEBase::cloneDependencies(const std::string& prefix) {
if ( phasespace() ) {
Ptr<MatchboxPhasespace>::ptr myPhasespace = phasespace()->cloneMe();
ostringstream pname;
pname << (prefix == "" ? fullName() : prefix) << "/" << myPhasespace->name();
if ( ! (generator()->preinitRegister(myPhasespace,pname.str()) ) )
throw Exception() << "MatchboxMEBase::cloneDependencies(): Phasespace generator " << pname.str() << " already existing." << Exception::runerror;
myPhasespace->cloneDependencies(pname.str());
phasespace(myPhasespace);
}
theAmplitude = dynamic_ptr_cast<Ptr<MatchboxAmplitude>::ptr>(amplitude());
if ( matchboxAmplitude() ) {
Ptr<MatchboxAmplitude>::ptr myAmplitude = matchboxAmplitude()->cloneMe();
ostringstream pname;
pname << (prefix == "" ? fullName() : prefix) << "/" << myAmplitude->name();
if ( ! (generator()->preinitRegister(myAmplitude,pname.str()) ) )
throw Exception() << "MatchboxMEBase::cloneDependencies(): Amplitude " << pname.str() << " already existing." << Exception::runerror;
myAmplitude->cloneDependencies(pname.str());
matchboxAmplitude(myAmplitude);
amplitude(myAmplitude);
matchboxAmplitude()->orderInGs(orderInAlphaS());
matchboxAmplitude()->orderInGem(orderInAlphaEW());
}
if ( scaleChoice() ) {
Ptr<MatchboxScaleChoice>::ptr myScaleChoice = scaleChoice()->cloneMe();
ostringstream pname;
pname << (prefix == "" ? fullName() : prefix) << "/" << myScaleChoice->name();
if ( ! (generator()->preinitRegister(myScaleChoice,pname.str()) ) )
throw Exception() << "MatchboxMEBase::cloneDependencies(): Scale choice " << pname.str() << " already existing." << Exception::runerror;
scaleChoice(myScaleChoice);
}
for ( vector<Ptr<MatchboxReweightBase>::ptr>::iterator rw =
theReweights.begin(); rw != theReweights.end(); ++rw ) {
Ptr<MatchboxReweightBase>::ptr myReweight = (**rw).cloneMe();
ostringstream pname;
pname << (prefix == "" ? fullName() : prefix) << "/" << (**rw).name();
if ( ! (generator()->preinitRegister(myReweight,pname.str()) ) )
throw Exception() << "MatchboxMEBase::cloneDependencies(): Reweight " << pname.str() << " already existing." << Exception::runerror;
myReweight->cloneDependencies(pname.str());
*rw = myReweight;
}
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
Ptr<MatchboxInsertionOperator>::ptr myIOP = (**v).cloneMe();
ostringstream pname;
pname << (prefix == "" ? fullName() : prefix) << "/" << (**v).name();
if ( ! (generator()->preinitRegister(myIOP,pname.str()) ) )
throw Exception() << "MatchboxMEBase::cloneDependencies(): Insertion operator " << pname.str() << " already existing." << Exception::runerror;
*v = myIOP;
}
}
void MatchboxMEBase::prepareXComb(MatchboxXCombData& xc) const {
// fixme We need to pass on the partons from the xcmob here, not
// assuming one subprocess per matrix element
if ( phasespace() )
xc.nDimPhasespace(phasespace()->nDim(diagrams().front()->partons()));
if ( matchboxAmplitude() ) {
xc.nDimAmplitude(matchboxAmplitude()->nDimAdditional());
if ( matchboxAmplitude()->colourBasis() ) {
size_t cdim =
matchboxAmplitude()->colourBasis()->prepare(diagrams(),noCorrelations());
xc.colourBasisDim(cdim);
}
if ( matchboxAmplitude()->isExternal() ) {
xc.externalId(matchboxAmplitude()->externalId(diagrams().front()->partons()));
}
}
int insertionAdd = 0;
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::const_iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
insertionAdd = max(insertionAdd,(**v).nDimAdditional());
}
xc.nDimInsertions(insertionAdd);
xc.nLight(getNLight());
for (size_t inlv=0; inlv<getNLightJetVec().size(); ++inlv)
xc.nLightJetVec(getNLightJetVec()[inlv]);
for (size_t inhv=0; inhv<getNHeavyJetVec().size(); ++inhv)
xc.nHeavyJetVec(getNHeavyJetVec()[inhv]);
for (size_t inlpv=0; inlpv<getNLightProtonVec().size(); ++inlpv)
xc.nLightProtonVec(getNLightProtonVec()[inlpv]);
xc.olpId(olpProcess());
if ( initVerbose() ) {
ostringstream fname_strm;
// only allow alphanumeric, / and _ in filename
BOOST_FOREACH (const char c, name()) {
switch (c) {
case '+' : fname_strm << "+"; break;
case '-' : fname_strm << "-"; break;
case '~' : fname_strm << "_tilde"; break;
case ']' : break;
case ',' : fname_strm << "__"; break;
default : fname_strm << (isalnum(c) ? c : '_'); break;
}
}
fname_strm << ".diagrams";
const string fname = fname_strm.str();
ifstream test(fname.c_str());
if ( !test ) {
test.close();
ofstream out(fname.c_str());
for ( vector<Ptr<DiagramBase>::ptr>::const_iterator d = diagrams().begin();
d != diagrams().end(); ++d ) {
DiagramDrawer::drawDiag(out,dynamic_cast<const Tree2toNDiagram&>(**d));
out << "\n";
}
}
}
}
StdXCombPtr MatchboxMEBase::makeXComb(Energy newMaxEnergy, const cPDPair & inc,
tEHPtr newEventHandler,tSubHdlPtr newSubProcessHandler,
tPExtrPtr newExtractor, tCascHdlPtr newCKKW,
const PBPair & newPartonBins, tCutsPtr newCuts,
const DiagramVector & newDiagrams, bool mir,
const PartonPairVec&,
tStdXCombPtr newHead,
tMEPtr newME) {
if ( !newME )
newME = this;
Ptr<MatchboxXComb>::ptr xc =
new_ptr(MatchboxXComb(newMaxEnergy, inc,
newEventHandler, newSubProcessHandler,
newExtractor, newCKKW,
newPartonBins, newCuts, newME,
newDiagrams, mir,
newHead));
prepareXComb(*xc);
return xc;
}
StdXCombPtr MatchboxMEBase::makeXComb(tStdXCombPtr newHead,
const PBPair & newPartonBins,
const DiagramVector & newDiagrams,
tMEPtr newME) {
if ( !newME )
newME = this;
Ptr<MatchboxXComb>::ptr xc =
new_ptr(MatchboxXComb(newHead, newPartonBins, newME, newDiagrams));
prepareXComb(*xc);
return xc;
}
void MatchboxMEBase::persistentOutput(PersistentOStream & os) const {
os << theLastXComb << theFactory << thePhasespace
<< theAmplitude << theScaleChoice << theVirtuals
<< theReweights << theSubprocess << theOneLoop
<< theOneLoopNoBorn << theOneLoopNoLoops
<< epsilonSquarePoleHistograms << epsilonPoleHistograms
<< theOLPProcess << theNoCorrelations
<< theHavePDFs << checkedPDFs<<theDiagramWeightVerboseDown<<theDiagramWeightVerboseUp;
}
void MatchboxMEBase::persistentInput(PersistentIStream & is, int) {
is >> theLastXComb >> theFactory >> thePhasespace
>> theAmplitude >> theScaleChoice >> theVirtuals
>> theReweights >> theSubprocess >> theOneLoop
>> theOneLoopNoBorn >> theOneLoopNoLoops
>> epsilonSquarePoleHistograms >> epsilonPoleHistograms
>> theOLPProcess >> theNoCorrelations
>> theHavePDFs >> checkedPDFs>>theDiagramWeightVerboseDown>>theDiagramWeightVerboseUp;
lastMatchboxXComb(theLastXComb);
}
void MatchboxMEBase::Init() {
static ClassDocumentation<MatchboxMEBase> documentation
("MatchboxMEBase is the base class for matrix elements "
"in the context of the matchbox NLO interface.");
}
IBPtr MatchboxMEBase::clone() const {
return new_ptr(*this);
}
IBPtr MatchboxMEBase::fullclone() const {
return new_ptr(*this);
}
void MatchboxMEBase::doinit() {
MEBase::doinit();
if ( !theAmplitude )
theAmplitude = dynamic_ptr_cast<Ptr<MatchboxAmplitude>::ptr>(amplitude());
if ( matchboxAmplitude() )
matchboxAmplitude()->init();
if ( phasespace() ) {
phasespace()->init();
matchboxAmplitude()->checkReshuffling(phasespace());
}
if ( scaleChoice() ) {
scaleChoice()->init();
}
for ( vector<Ptr<MatchboxReweightBase>::ptr>::iterator rw =
theReweights.begin(); rw != theReweights.end(); ++rw ) {
(**rw).init();
}
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
(**v).init();
}
}
void MatchboxMEBase::bookMEoverDiaWeight(double x) const {
if (MEoverDiaWeight.size()==0){
theDiagramWeightVerboseDown=min(theDiagramWeightVerboseDown,x*0.9);
theDiagramWeightVerboseUp=max(theDiagramWeightVerboseUp,x*1.1);
}
map<double,double>::iterator bx =MEoverDiaWeight.upper_bound(x);
if ( bx == MEoverDiaWeight.end() ) {
return;
}
bx->second += 1.;
Nevents++;
if (int(Nevents)%1000==0){
ofstream out((RunDirectories::runStorage()+"/"+name()+"-MeoDiaW.dat").c_str());
int i=0;
double m=0.;
for ( map<double,double>::const_iterator bx = MEoverDiaWeight.begin();bx != MEoverDiaWeight.end(); ++bx,i++ ) {
out << " " << bx->first<<" "<<( bx->second/double(Nevents))<<"\n ";
m=max(m,bx->second/double(Nevents));
}
out.close();
ofstream gpout((RunDirectories::runStorage()+"/"+name()+"-MeoDiaW.gp").c_str());
gpout << "set terminal epslatex color solid\n"
<< "set output '" << name()<<"-MeoDiaW"<< "-plot.tex'\n"
<< "#set logscale x\n"
<< "set xrange [" << theDiagramWeightVerboseDown << ":" << theDiagramWeightVerboseUp << "]\n"
<< "set yrange [0.:"<<(m*0.95)<<"]\n"
<< "set xlabel '$log(ME/\\sum DiaW)$'\n"
<< "set size 0.7,0.7\n"
<< "plot 1 w lines lc rgbcolor \"#DDDDDD\" notitle, '" << name()<<"-MeoDiaW"
<< ".dat' with histeps lc rgbcolor \"#00AACC\" t '$"<<name()<<"$'";
gpout.close();
}
}
void MatchboxMEBase::doinitrun() {
MEBase::doinitrun();
if ( matchboxAmplitude() )
matchboxAmplitude()->initrun();
if ( phasespace() ) {
phasespace()->initrun();
}
if ( scaleChoice() ) {
scaleChoice()->initrun();
}
for ( vector<Ptr<MatchboxReweightBase>::ptr>::iterator rw =
theReweights.begin(); rw != theReweights.end(); ++rw ) {
(**rw).initrun();
}
for ( vector<Ptr<MatchboxInsertionOperator>::ptr>::iterator v =
virtuals().begin(); v != virtuals().end(); ++v ) {
(**v).initrun();
}
if ( factory()->verboseDia() ) {
for ( int k = 0; k < factory()->diagramWeightVerboseNBins() ; ++k ) {
MEoverDiaWeight[theDiagramWeightVerboseDown+
double(k)*(theDiagramWeightVerboseUp-
theDiagramWeightVerboseDown)
/double(factory()->diagramWeightVerboseNBins()) ] = 0.;
}
Nevents=0.;
ofstream out("DiagramWeights.sh");
out<<"P=$(pwd)"
<<"\ncd "<<RunDirectories::runStorage()
<<"\nrm -f DiagramWeights.tex"
<<"\n echo \"\\documentclass{article}\" >> DiagramWeights.tex"
<<"\n echo \"\\usepackage{amsmath,amsfonts,amssymb,graphicx,color}\" >> DiagramWeights.tex"
<<"\n echo \"\\usepackage[left=2cm,right=2cm,top=2cm,bottom=2cm]{geometry}\" >> DiagramWeights.tex"
<<"\n echo \"\\begin{document}\" >> DiagramWeights.tex"
<<"\n echo \"\\setlength{\\parindent}{0cm}\" >> DiagramWeights.tex"
<<"\n\n for i in $(ls *.gp | sed s/'\\.gp'//g) ; "
<<"\n do"
<<"\n echo \"\\input{\"\"$i\"-plot\"}\" >> DiagramWeights.tex"
<<"\n done"
<<"\n echo \"\\end{document}\" >> DiagramWeights.tex "
<<"\n for i in *.gp ; do "
<<"\n gnuplot $i "
<<"\n done "
<<"\n pdflatex DiagramWeights.tex \ncp DiagramWeights.pdf $P";
out.close();
}
}
void MatchboxMEBase::dofinish() {
MEBase::dofinish();
for ( map<cPDVector,AccuracyHistogram>::const_iterator
b = epsilonSquarePoleHistograms.begin();
b != epsilonSquarePoleHistograms.end(); ++b ) {
b->second.dump(factory()->poleData(),"epsilonSquarePoles-",b->first);
}
for ( map<cPDVector,AccuracyHistogram>::const_iterator
b = epsilonPoleHistograms.begin();
b != epsilonPoleHistograms.end(); ++b ) {
b->second.dump(factory()->poleData(),"epsilonPoles-",b->first);
}
}
// *** Attention *** The following static variable is needed for the type
// description system in ThePEG. Please check that the template arguments
// are correct (the class and its base class), and that the constructor
// arguments are correct (the class name and the name of the dynamically
// loadable library where the class implementation can be found).
DescribeClass<MatchboxMEBase,MEBase>
describeHerwigMatchboxMEBase("Herwig::MatchboxMEBase", "Herwig.so");
diff --git a/MatrixElement/Matchbox/Base/MatchboxMEBase.h b/MatrixElement/Matchbox/Base/MatchboxMEBase.h
--- a/MatrixElement/Matchbox/Base/MatchboxMEBase.h
+++ b/MatrixElement/Matchbox/Base/MatchboxMEBase.h
@@ -1,1137 +1,1142 @@
// -*- C++ -*-
//
// MatchboxMEBase.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2012 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_MatchboxMEBase_H
#define HERWIG_MatchboxMEBase_H
//
// This is the declaration of the MatchboxMEBase class.
//
#include "ThePEG/MatrixElement/MEBase.h"
#include "Herwig/MatrixElement/Matchbox/Utility/SpinCorrelationTensor.h"
#include "Herwig/MatrixElement/Matchbox/Utility/Tree2toNGenerator.h"
#include "Herwig/MatrixElement/Matchbox/Utility/MatchboxScaleChoice.h"
#include "Herwig/MatrixElement/Matchbox/Utility/ProcessData.h"
#include "Herwig/MatrixElement/Matchbox/Base/MatchboxAmplitude.h"
#include "Herwig/MatrixElement/Matchbox/Base/MatchboxReweightBase.h"
#include "Herwig/MatrixElement/Matchbox/Base/MatchboxMEBase.fh"
#include "Herwig/MatrixElement/Matchbox/Dipoles/SubtractionDipole.fh"
#include "Herwig/MatrixElement/Matchbox/InsertionOperators/MatchboxInsertionOperator.h"
#include "Herwig/MatrixElement/Matchbox/MatchboxFactory.fh"
#include "Herwig/MatrixElement/Matchbox/Utility/LastMatchboxXCombInfo.h"
#include "Herwig/MatrixElement/Matchbox/Utility/MatchboxXComb.h"
namespace Herwig {
using namespace ThePEG;
/**
* \ingroup Matchbox
* \author Simon Platzer
*
* \brief MatchboxMEBase is the base class for matrix elements
* in the context of the matchbox NLO interface.
*
* @see \ref MatchboxMEBaseInterfaces "The interfaces"
* defined for MatchboxMEBase.
*/
class MatchboxMEBase:
public MEBase, public LastMatchboxXCombInfo {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* The default constructor.
*/
MatchboxMEBase();
/**
* The destructor.
*/
virtual ~MatchboxMEBase();
//@}
public:
/**
* Return the factory which produced this matrix element
*/
Ptr<MatchboxFactory>::tptr factory() const;
/**
* Set the factory which produced this matrix element
*/
void factory(Ptr<MatchboxFactory>::tptr f);
/** @name Subprocess and diagram information. */
//@{
/**
* Return the subprocess.
*/
const Process& subProcess() const { return theSubprocess; }
/**
* Access the subprocess.
*/
Process& subProcess() { return theSubprocess; }
/**
* Return the diagram generator.
*/
Ptr<Tree2toNGenerator>::tptr diagramGenerator() const;
/**
* Return the process data.
*/
Ptr<ProcessData>::tptr processData() const;
/**
* Return true, if this matrix element does not want to
* make use of mirroring processes; in this case all
* possible partonic subprocesses with a fixed assignment
* of incoming particles need to be provided through the diagrams
* added with the add(...) method.
*/
virtual bool noMirror () const { return true; }
/**
* Add all possible diagrams with the add() function.
*/
virtual void getDiagrams() const;
using MEBase::getDiagrams;
/**
* With the information previously supplied with the
* setKinematics(...) method, a derived class may optionally
* override this method to weight the given diagrams with their
* (although certainly not physical) relative probabilities.
*/
virtual Selector<DiagramIndex> diagrams(const DiagramVector &) const;
using MEBase::diagrams;
/**
* Return a Selector with possible colour geometries for the selected
* diagram weighted by their relative probabilities.
*/
virtual Selector<const ColourLines *>
colourGeometries(tcDiagPtr diag) const;
/**
* Return true, if this amplitude is capable of consistently filling
* the rho matrices for the spin correllations
*/
virtual bool canFillRhoMatrix() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->canFillRhoMatrix();
return false;
}
/**
* construct the spin information for the interaction
*/
virtual void constructVertex(tSubProPtr) {}
/**
* construct the spin information for the interaction
*/
virtual void constructVertex(tSubProPtr sub, const ColourLines* cl);
/**
* Return the order in \f$\alpha_S\f$ in which this matrix element
* is given.
*/
virtual unsigned int orderInAlphaS() const;
using MEBase::orderInAlphaS;
/**
* Return the order in \f$\alpha_{EM}\f$ in which this matrix
* element is given. Returns 0.
*/
virtual unsigned int orderInAlphaEW() const;
using MEBase::orderInAlphaEW;
/**
* Return true, if this amplitude already includes averaging over
* incoming parton's quantum numbers.
*/
virtual bool hasInitialAverage() const {
return matchboxAmplitude() ? matchboxAmplitude()->hasInitialAverage() : false;
}
/**
* Return true, if this amplitude already includes symmetry factors
* for identical outgoing particles.
*/
virtual bool hasFinalStateSymmetry() const {
return matchboxAmplitude() ? matchboxAmplitude()->hasFinalStateSymmetry() : false;
}
/**
* Return the number of light flavours, this matrix
* element is calculated for.
*/
virtual unsigned int getNLight() const;
/**
* Return the vector that contains the PDG ids of
* the light flavours, which are contained in the
* jet particle group.
*/
virtual vector<int> getNLightJetVec() const;
/**
* Return the vector that contains the PDG ids of
* the heavy flavours, which are contained in the
* jet particle group.
*/
virtual vector<int> getNHeavyJetVec() const;
/**
* Return the vector that contains the PDG ids of
* the light flavours, which are contained in the
* proton particle group.
*/
virtual vector<int> getNLightProtonVec() const;
/**
* Return true, if this matrix element is handled by a BLHA one-loop provider
*/
virtual bool isOLPTree() const {
return matchboxAmplitude() ? matchboxAmplitude()->isOLPTree() : false;
}
/**
* Return true, if this matrix element is handled by a BLHA one-loop provider
*/
virtual bool isOLPLoop() const {
return matchboxAmplitude() ? matchboxAmplitude()->isOLPLoop() : false;
}
/**
* Return true, if colour and spin correlated matrix elements should
* be ordered from the OLP
*/
virtual bool needsOLPCorrelators() const {
return matchboxAmplitude() ? matchboxAmplitude()->needsOLPCorrelators() : true;
}
/**
* Return the process index, if this is an OLP handled matrix element
*/
const vector<int>& olpProcess() const { return theOLPProcess; }
/**
* Set the process index, if this is an OLP handled matrix element
*/
void olpProcess(int pType, int id) {
if ( theOLPProcess.empty() )
theOLPProcess.resize(5,0);
theOLPProcess[pType] = id;
}
/**
* Return true, if this is a real emission matrix element which does
* not require colour correlators.
*/
bool noCorrelations() const {
return theNoCorrelations;
}
/**
* Indicate that this is a real emission matrix element which does
* not require colour correlators.
*/
void needsNoCorrelations() {
theNoCorrelations = true;
}
/**
* Indicate that this is a virtual matrix element which does
* require colour correlators.
*/
void needsCorrelations() {
theNoCorrelations = false;
}
//@}
/** @name Phasespace generation */
//@{
/**
* Return the phase space generator to be used.
*/
Ptr<MatchboxPhasespace>::tptr phasespace() const { return thePhasespace; }
/**
* Set the phase space generator to be used.
*/
void phasespace(Ptr<MatchboxPhasespace>::ptr ps) { thePhasespace = ps; }
/**
* Set the XComb object to be used in the next call to
* generateKinematics() and dSigHatDR().
*/
virtual void setXComb(tStdXCombPtr xc);
/**
* Return true, if the XComb steering this matrix element
* should keep track of the random numbers used to generate
* the last phase space point
*/
virtual bool keepRandomNumbers() const { return true; }
/**
* Generate incoming parton momenta. This default
* implementation performs the standard mapping
* from x1,x2 -> tau,y making 1/tau flat; incoming
* parton momenta are stored in meMomenta()[0,1],
* only massless partons are supported so far;
* return the Jacobian of the mapping
*/
double generateIncomingPartons(const double* r1, const double* r2);
/**
* Generate internal degrees of freedom given nDim() uniform random
* numbers in the interval ]0,1[. To help the phase space generator,
* the 'dSigHatDR' should be a smooth function of these numbers,
* although this is not strictly necessary. The return value should
* be true of the generation succeeded. If so the generated momenta
* should be stored in the meMomenta() vector. Derived classes
* must call this method once internal degrees of freedom are setup
* and finally return the result of this method.
*/
virtual bool generateKinematics(const double * r);
/**
* The number of internal degreed of freedom used in the matrix
* element.
*/
virtual int nDim() const;
/**
* The number of internal degrees of freedom used in the matrix
* element for generating a Born phase space point
*/
virtual int nDimBorn() const;
/**
* Return true, if this matrix element will generate momenta for the
* incoming partons itself. The matrix element is required to store
* the incoming parton momenta in meMomenta()[0,1]. No mapping in
* tau and y is performed by the PartonExtractor object, if a
* derived class returns true here. The phase space jacobian is to
* include a factor 1/(x1 x2).
*/
virtual bool haveX1X2() const {
return
(phasespace() ? phasespace()->haveX1X2() : false) ||
diagrams().front()->partons().size() == 3;
}
/**
* Return true, if this matrix element expects
* the incoming partons in their center-of-mass system
*/
virtual bool wantCMS() const {
return
(phasespace() ? phasespace()->wantCMS() : true) &&
diagrams().front()->partons().size() != 3; }
/**
* Return the meMomenta as generated at the last
* phase space point.
*/
const vector<Lorentz5Momentum>& lastMEMomenta() const { return meMomenta(); }
/**
* Access the meMomenta.
*/
vector<Lorentz5Momentum>& lastMEMomenta() { return meMomenta(); }
//@}
/** @name Scale choices, couplings and PDFs */
//@{
/**
* Set the scale choice object
*/
void scaleChoice(Ptr<MatchboxScaleChoice>::ptr sc) { theScaleChoice = sc; }
/**
* Return the scale choice object
*/
Ptr<MatchboxScaleChoice>::tptr scaleChoice() const { return theScaleChoice; }
/**
* Set scales and alphaS
*/
void setScale() const;
/**
* Indicate that this matrix element is running alphas by itself.
*/
virtual bool hasRunningAlphaS() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->hasRunningAlphaS();
return false;
}
/**
* Indicate that this matrix element is running alphaew by itself.
*/
virtual bool hasRunningAlphaEW() const {
if ( matchboxAmplitude() )
return matchboxAmplitude()->hasRunningAlphaEW();
return false;
}
/**
* Return the scale associated with the phase space point provided
* by the last call to setKinematics().
*/
virtual Energy2 scale() const { return lastScale(); }
/**
* Return the renormalization scale for the last generated phasespace point.
*/
virtual Energy2 factorizationScale() const;
/**
* Get the factorization scale factor
*/
virtual double factorizationScaleFactor() const;
/**
* Return the (QCD) renormalization scale for the last generated phasespace point.
*/
virtual Energy2 renormalizationScale() const;
/**
* Get the renormalization scale factor
*/
virtual double renormalizationScaleFactor() const;
/**
* Return the QED renormalization scale for the last generated phasespace point.
*/
virtual Energy2 renormalizationScaleQED() const;
/**
+ * Return the shower scale for the last generated phasespace point.
+ */
+ virtual Energy2 showerScale() const;
+
+ /**
* Set veto scales on the particles at the given
* SubProcess which has been generated using this
* matrix element.
*/
virtual void setVetoScales(tSubProPtr) const;
/**
* Return true, if fixed couplings are used.
*/
bool fixedCouplings() const;
/**
* Return true, if fixed couplings are used.
*/
bool fixedQEDCouplings() const;
/**
* Return the value of \f$\alpha_S\f$ associated with the phase
* space point provided by the last call to setKinematics(). This
* versions returns SM().alphaS(scale()).
*/
virtual double alphaS() const { return lastAlphaS(); }
/**
* Return the value of \f$\alpha_EM\f$ associated with the phase
* space point provided by the last call to setKinematics(). This
* versions returns SM().alphaEM(scale()).
*/
virtual double alphaEM() const { return lastAlphaEM(); }
/**
* Return true, if this matrix element provides the PDF
* weight for the first incoming parton itself.
*/
virtual bool havePDFWeight1() const;
/**
* Return true, if this matrix element provides the PDF
* weight for the second incoming parton itself.
*/
virtual bool havePDFWeight2() const;
/**
* Set the PDF weight.
*/
void getPDFWeight(Energy2 factorizationScale = ZERO) const;
/**
* Supply the PDF weight for the first incoming parton.
*/
double pdf1(Energy2 factorizationScale = ZERO,
double xEx = 1., double xFactor = 1.) const;
/**
* Supply the PDF weight for the second incoming parton.
*/
double pdf2(Energy2 factorizationScale = ZERO,
double xEx = 1., double xFactor = 1.) const;
//@}
/** @name Amplitude information and matrix element evaluation */
//@{
/**
* Return the amplitude.
*/
Ptr<MatchboxAmplitude>::tptr matchboxAmplitude() const { return theAmplitude; }
/**
* Set the amplitude.
*/
void matchboxAmplitude(Ptr<MatchboxAmplitude>::ptr amp) { theAmplitude = amp; }
/**
* Return the matrix element for the kinematical configuation
* previously provided by the last call to setKinematics(), suitably
* scaled by sHat() to give a dimension-less number.
*/
virtual double me2() const;
/**
* Return the matrix element for the kinematical configuation
* previously provided by the last call to setKinematics(), suitably
* scaled by sHat() to give a dimension-less number.
*/
virtual double largeNME2(Ptr<ColourBasis>::tptr largeNBasis) const;
/**
* Return the symmetry factor for identical final state particles.
*/
virtual double finalStateSymmetry() const;
/**
* Return the normalizing factor for the matrix element averaged
* over quantum numbers and including running couplings.
*/
double me2Norm(unsigned int addAlphaS = 0) const;
/**
* Return the matrix element squared differential in the variables
* given by the last call to generateKinematics().
*/
virtual CrossSection dSigHatDR() const;
//@}
/** @name One-loop corrections */
//@{
/**
* Return the one-loop/tree interference.
*/
virtual double oneLoopInterference() const;
/**
* Return true, if this matrix element is capable of calculating
* one-loop (QCD) corrections.
*/
virtual bool haveOneLoop() const;
/**
* Return true, if this matrix element only provides
* one-loop (QCD) corrections.
*/
virtual bool onlyOneLoop() const;
/**
* Return true, if the amplitude is DRbar renormalized, otherwise
* MSbar is assumed.
*/
virtual bool isDRbar() const;
/**
* Return true, if one loop corrections have been calculated in
* dimensional reduction. Otherwise conventional dimensional
* regularization is assumed. Note that renormalization is always
* assumed to be MSbar.
*/
virtual bool isDR() const;
/**
* Return true, if one loop corrections are given in the conventions
* of the integrated dipoles.
*/
virtual bool isCS() const;
/**
* Return true, if one loop corrections are given in the conventions
* of BDK.
*/
virtual bool isBDK() const;
/**
* Return true, if one loop corrections are given in the conventions
* of everything expanded.
*/
virtual bool isExpanded() const;
/**
* Return the value of the dimensional regularization
* parameter. Note that renormalization scale dependence is fully
* restored in DipoleIOperator.
*/
virtual Energy2 mu2() const;
/**
* If defined, return the coefficient of the pole in epsilon^2
*/
virtual double oneLoopDoublePole() const;
/**
* If defined, return the coefficient of the pole in epsilon
*/
virtual double oneLoopSinglePole() const;
/**
* Return true, if cancellationn of epsilon poles should be checked.
*/
bool checkPoles() const;
/**
* Simple histogram for accuracy checks
*/
struct AccuracyHistogram {
/**
* The lower bound
*/
double lower;
/**
* The upper bound
*/
double upper;
/**
* The bins, indexed by upper bound.
*/
map<double,double> bins;
/**
* The number of points of same sign
*/
unsigned long sameSign;
/**
* The number of points of opposite sign
*/
unsigned long oppositeSign;
/**
* The number of points being nan or inf
*/
unsigned long nans;
/**
* The overflow
*/
unsigned long overflow;
/**
* The underflow
*/
unsigned long underflow;
/**
* Constructor
*/
AccuracyHistogram(double low = -40.,
double up = 0.,
unsigned int nbins = 80);
/**
* Book two values to be checked for numerical compatibility
*/
void book(double a, double b);
/**
* Write to file.
*/
void dump(const std::string& folder, const std::string& prefix,
const cPDVector& proc) const;
/**
* Write to persistent ostream
*/
void persistentOutput(PersistentOStream&) const;
/**
* Read from persistent istream
*/
void persistentInput(PersistentIStream&);
};
/**
* Perform the check of epsilon pole cancellation.
*/
void logPoles() const;
/**
* Return the virtual corrections
*/
const vector<Ptr<MatchboxInsertionOperator>::ptr>& virtuals() const {
return theVirtuals;
}
/**
* Return the virtual corrections
*/
vector<Ptr<MatchboxInsertionOperator>::ptr>& virtuals() {
return theVirtuals;
}
/**
* Instruct this matrix element to include one-loop corrections
*/
void doOneLoop() { theOneLoop = true; }
/**
* Return true, if this matrix element includes one-loop corrections
*/
bool oneLoop() const { return theOneLoop; }
/**
* Instruct this matrix element to include one-loop corrections but
* no Born contributions
*/
void doOneLoopNoBorn() { theOneLoop = true; theOneLoopNoBorn = true; }
/**
* Return true, if this matrix element includes one-loop corrections
* but no Born contributions
*/
bool oneLoopNoBorn() const { return theOneLoopNoBorn || onlyOneLoop(); }
/**
* Instruct this matrix element to include one-loop corrections but
* no actual loop contributions
*/
void doOneLoopNoLoops() { theOneLoop = true; theOneLoopNoLoops = true; }
/**
* Return true, if this matrix element includes one-loop corrections
* but no actual loop contributions
*/
bool oneLoopNoLoops() const { return theOneLoopNoLoops; }
//@}
/** @name Dipole subtraction */
//@{
/**
* If this matrix element is considered a real
* emission matrix element, return all subtraction
* dipoles needed given a set of subtraction terms
* and underlying Born matrix elements to choose
* from.
*/
vector<Ptr<SubtractionDipole>::ptr>
getDipoles(const vector<Ptr<SubtractionDipole>::ptr>&,
const vector<Ptr<MatchboxMEBase>::ptr>&) const;
/**
* If this matrix element is considered a real emission matrix
* element, but actually neglecting a subclass of the contributing
* diagrams, return true if the given emitter-emission-spectator
* configuration should not be considered when setting up
* subtraction dipoles.
*/
virtual bool noDipole(int,int,int) const { return false; }
/**
* If this matrix element is considered an underlying Born matrix
* element in the context of a subtracted real emission, but
* actually neglecting a subclass of the contributing diagrams,
* return true if the given emitter-spectator configuration
* should not be considered when setting up subtraction dipoles.
*/
virtual bool noDipole(int,int) const { return false; }
/**
* Return the colour correlated matrix element squared with
* respect to the given two partons as appearing in mePartonData(),
* suitably scaled by sHat() to give a dimension-less number.
*/
virtual double colourCorrelatedME2(pair<int,int>) const;
/**
* Return the colour correlated matrix element squared in the
* large-N approximation with respect to the given two partons as
* appearing in mePartonData(), suitably scaled by sHat() to give a
* dimension-less number.
*/
virtual double largeNColourCorrelatedME2(pair<int,int> ij,
Ptr<ColourBasis>::tptr largeNBasis) const;
/**
* Return the colour and spin correlated matrix element squared for
* the gluon indexed by the first argument using the given
* correlation tensor.
*/
virtual double spinColourCorrelatedME2(pair<int,int> emitterSpectator,
const SpinCorrelationTensor& c) const;
/**
* Return the spin correlated matrix element squared for
* the vector boson indexed by the first argument using the given
* correlation tensor.
*/
virtual double spinCorrelatedME2(pair<int,int> emitterSpectator,
const SpinCorrelationTensor& c) const;
//@}
/** @name Caching and diagnostic information */
//@{
/**
* Inform this matrix element that a new phase space
* point is about to be generated, so all caches should
* be flushed.
*/
virtual void flushCaches();
/**
* Return true, if verbose
*/
bool verbose() const;
/**
* Return true, if verbose
*/
bool initVerbose() const;
/**
* Dump the setup to an ostream
*/
void print(ostream&) const;
/**
* Print debug information on the last event
*/
virtual void printLastEvent(ostream&) const;
/**
* Write out diagnostic information for
* generateKinematics
*/
void logGenerateKinematics(const double * r) const;
/**
* Write out diagnostic information for
* setting scales
*/
void logSetScale() const;
/**
* Write out diagnostic information for
* pdf evaluation
*/
void logPDFWeight() const;
/**
* Write out diagnostic information for
* me2 evaluation
*/
void logME2() const;
/**
* Write out diagnostic information
* for dsigdr evaluation
*/
void logDSigHatDR() const;
//@}
/** @name Reweight objects */
//@{
/**
* Insert a reweight object
*/
void addReweight(Ptr<MatchboxReweightBase>::ptr rw) { theReweights.push_back(rw); }
/**
* Return the reweights
*/
const vector<Ptr<MatchboxReweightBase>::ptr>& reweights() const { return theReweights; }
/**
* Access the reweights
*/
vector<Ptr<MatchboxReweightBase>::ptr>& reweights() { return theReweights; }
//@}
/** @name Methods used to setup MatchboxMEBase objects */
//@{
/**
* Return true if this object needs to be initialized before all
* other objects (except those for which this function also returns
* true). This default version always returns false, but subclasses
* may override it to return true.
*/
virtual bool preInitialize() const { return true; }
/**
* Clone this matrix element.
*/
Ptr<MatchboxMEBase>::ptr cloneMe() const {
return dynamic_ptr_cast<Ptr<MatchboxMEBase>::ptr>(clone());
}
/**
* Clone the dependencies, using a given prefix.
*/
void cloneDependencies(const std::string& prefix = "");
/**
* Prepare an xcomb
*/
void prepareXComb(MatchboxXCombData&) const;
/**
* For the given event generation setup return a xcomb object
* appropriate to this matrix element.
*/
virtual StdXCombPtr makeXComb(Energy newMaxEnergy, const cPDPair & inc,
tEHPtr newEventHandler,tSubHdlPtr newSubProcessHandler,
tPExtrPtr newExtractor, tCascHdlPtr newCKKW,
const PBPair & newPartonBins, tCutsPtr newCuts,
const DiagramVector & newDiagrams, bool mir,
const PartonPairVec& allPBins,
tStdXCombPtr newHead = tStdXCombPtr(),
tMEPtr newME = tMEPtr());
/**
* For the given event generation setup return a dependent xcomb object
* appropriate to this matrix element.
*/
virtual StdXCombPtr makeXComb(tStdXCombPtr newHead,
const PBPair & newPartonBins,
const DiagramVector & newDiagrams,
tMEPtr newME = tMEPtr());
//@}
public:
/** @name Functions used by the persistent I/O system. */
//@{
/**
* Function used to write out object persistently.
* @param os the persistent output stream written to.
*/
void persistentOutput(PersistentOStream & os) const;
/**
* Function used to read in object persistently.
* @param is the persistent input stream read from.
* @param version the version number of the object when written.
*/
void persistentInput(PersistentIStream & is, int version);
//@}
/**
* The standard Init function used to initialize the interfaces.
* Called exactly once for each class by the class description system
* before the main function starts or
* when this class is dynamically loaded.
*/
static void Init();
protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const;
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const;
//@}
protected:
/** @name Standard Interfaced functions. */
//@{
/**
* Initialize this object after the setup phase before saving an
* EventGenerator to disk.
* @throws InitException if object could not be initialized properly.
*/
virtual void doinit();
/**
* Initialize this object. Called in the run phase just before
* a run begins.
*/
virtual void doinitrun();
/**
* Finalize this object. Called in the run phase just after a
* run has ended. Used eg. to write out statistics.
*/
virtual void dofinish();
//@}
private:
/**
* The factory which produced this matrix element
*/
Ptr<MatchboxFactory>::tptr theFactory;
/**
* The phase space generator to be used.
*/
Ptr<MatchboxPhasespace>::ptr thePhasespace;
/**
* The amplitude to be used
*/
Ptr<MatchboxAmplitude>::ptr theAmplitude;
/**
* The scale choice object
*/
Ptr<MatchboxScaleChoice>::ptr theScaleChoice;
/**
* The virtual corrections.
*/
vector<Ptr<MatchboxInsertionOperator>::ptr> theVirtuals;
/**
* A vector of reweight objects the sum of which
* should be applied to reweight this matrix element
*/
vector<Ptr<MatchboxReweightBase>::ptr> theReweights;
private:
/**
* The subprocess to be considered.
*/
Process theSubprocess;
/**
* True, if this matrix element includes one-loop corrections
*/
bool theOneLoop;
/**
* True, if this matrix element includes one-loop corrections
* but no Born contributions
*/
bool theOneLoopNoBorn;
/**
* True, if this matrix element includes one-loop corrections
* but no actual loop contributions (e.g. finite collinear terms)
*/
bool theOneLoopNoLoops;
/**
* The process index, if this is an OLP handled matrix element
*/
vector<int> theOLPProcess;
/**
* Histograms of epsilon^2 pole cancellation
*/
mutable map<cPDVector,AccuracyHistogram> epsilonSquarePoleHistograms;
/**
* Histograms of epsilon pole cancellation
*/
mutable map<cPDVector,AccuracyHistogram> epsilonPoleHistograms;
/**
* True, if this is a real emission matrix element which does
* not require colour correlators.
*/
bool theNoCorrelations;
/**
* Flag which pdfs should be included.
*/
mutable pair<bool,bool> theHavePDFs;
/**
* True, if already checked for which PDFs to include.
*/
mutable bool checkedPDFs;
/**
* Diagnostic Diagram for TreePhaseSpace
*/
void bookMEoverDiaWeight(double x) const;
mutable map<double,double > MEoverDiaWeight;
mutable int Nevents;
/**
* Range of diagram weight verbosity
*/
mutable double theDiagramWeightVerboseDown, theDiagramWeightVerboseUp;
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
MatchboxMEBase & operator=(const MatchboxMEBase &);
};
inline PersistentOStream& operator<<(PersistentOStream& os,
const MatchboxMEBase::AccuracyHistogram& h) {
h.persistentOutput(os);
return os;
}
inline PersistentIStream& operator>>(PersistentIStream& is,
MatchboxMEBase::AccuracyHistogram& h) {
h.persistentInput(is);
return is;
}
}
#endif /* HERWIG_MatchboxMEBase_H */
diff --git a/MatrixElement/Matchbox/Matching/ShowerApproximation.cc b/MatrixElement/Matchbox/Matching/ShowerApproximation.cc
--- a/MatrixElement/Matchbox/Matching/ShowerApproximation.cc
+++ b/MatrixElement/Matchbox/Matching/ShowerApproximation.cc
@@ -1,685 +1,685 @@
// -*- C++ -*-
//
// ShowerApproximation.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2012 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the ShowerApproximation class.
//
#include "ShowerApproximation.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/EventRecord/Particle.h"
#include "ThePEG/Repository/UseRandom.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "Herwig/MatrixElement/Matchbox/Dipoles/SubtractionDipole.h"
#include "Herwig/MatrixElement/Matchbox/Phasespace/TildeKinematics.h"
#include "Herwig/MatrixElement/Matchbox/Phasespace/InvertedTildeKinematics.h"
using namespace Herwig;
ShowerApproximation::ShowerApproximation()
: HandlerBase(),
theExtrapolationX(1.0), theBelowCutoff(false),
theFFPtCut(1.0*GeV), theFFScreeningScale(ZERO),
theFIPtCut(1.0*GeV), theFIScreeningScale(ZERO),
theIIPtCut(1.0*GeV), theIIScreeningScale(ZERO),
theSafeCut(0.0*GeV),
theRestrictPhasespace(true), theHardScaleFactor(1.0),
theRenormalizationScaleFactor(1.0), theFactorizationScaleFactor(1.0),
theRealEmissionScaleInSubtraction(showerScale),
theBornScaleInSubtraction(showerScale),
theEmissionScaleInSubtraction(showerScale),
theRealEmissionScaleInSplitting(showerScale),
theBornScaleInSplitting(showerScale),
theEmissionScaleInSplitting(showerScale),
theRenormalizationScaleFreeze(1.*GeV),
theFactorizationScaleFreeze(1.*GeV),
maxPtIsMuF(false) {}
ShowerApproximation::~ShowerApproximation() {}
void ShowerApproximation::setLargeNBasis() {
assert(dipole()->realEmissionME()->matchboxAmplitude());
if ( !dipole()->realEmissionME()->matchboxAmplitude()->treeAmplitudes() )
return;
if ( !theLargeNBasis ) {
if ( !dipole()->realEmissionME()->matchboxAmplitude()->colourBasis() )
throw Exception() << "ShowerApproximation::setLargeNBasis(): Expecting a colour basis object."
<< Exception::runerror;
theLargeNBasis =
dipole()->realEmissionME()->matchboxAmplitude()->colourBasis()->cloneMe();
theLargeNBasis->clear();
theLargeNBasis->doLargeN();
}
}
void ShowerApproximation::setDipole(Ptr<SubtractionDipole>::tptr dip) {
theDipole = dip;
setLargeNBasis();
}
Ptr<SubtractionDipole>::tptr ShowerApproximation::dipole() const { return theDipole; }
Ptr<TildeKinematics>::tptr
ShowerApproximation::showerTildeKinematics() const {
return Ptr<TildeKinematics>::tptr();
}
Ptr<InvertedTildeKinematics>::tptr
ShowerApproximation::showerInvertedTildeKinematics() const {
return Ptr<InvertedTildeKinematics>::tptr();
}
void ShowerApproximation::checkCutoff() {
assert(!showerTildeKinematics());
}
void ShowerApproximation::getShowerVariables() {
// check for the cutoff
dipole()->isAboveCutoff(isAboveCutoff());
// get the hard scale
dipole()->showerHardScale(hardScale());
// set the shower scale and variables for completeness
dipole()->showerScale(dipole()->lastPt());
dipole()->showerParameters().resize(1);
dipole()->showerParameters()[0] = dipole()->lastZ();
// check for phase space
dipole()->isInShowerPhasespace(isInShowerPhasespace());
}
bool ShowerApproximation::isAboveCutoff() const {
if ( dipole()->bornEmitter() > 1 &&
dipole()->bornSpectator() > 1 ) {
return dipole()->lastPt() >= max(ffPtCut(),safeCut());
} else if ( ( dipole()->bornEmitter() > 1 &&
dipole()->bornSpectator() < 2 ) ||
( dipole()->bornEmitter() < 2 &&
dipole()->bornSpectator() > 1 ) ) {
return dipole()->lastPt() >= max(fiPtCut(),safeCut());
} else {
assert(dipole()->bornEmitter() < 2 &&
dipole()->bornSpectator() < 2);
return dipole()->lastPt() >= max(iiPtCut(),safeCut());
}
return true;
}
Energy ShowerApproximation::hardScale() const {
if ( !maxPtIsMuF ) {
if ( !bornCXComb()->mePartonData()[0]->coloured() &&
!bornCXComb()->mePartonData()[1]->coloured() ) {
Energy maxPt = (bornCXComb()->meMomenta()[0] + bornCXComb()->meMomenta()[1]).m();
maxPt *= hardScaleFactor();
return maxPt;
}
Energy maxPt = generator()->maximumCMEnergy();
vector<Lorentz5Momentum>::const_iterator p =
bornCXComb()->meMomenta().begin() + 2;
cPDVector::const_iterator pp =
bornCXComb()->mePartonData().begin() + 2;
for ( ; p != bornCXComb()->meMomenta().end(); ++p, ++pp )
if ( (**pp).coloured() )
maxPt = min(maxPt,p->mt());
if ( maxPt == generator()->maximumCMEnergy() )
maxPt = (bornCXComb()->meMomenta()[0] + bornCXComb()->meMomenta()[1]).m();
maxPt *= hardScaleFactor();
return maxPt;
} else {
- return hardScaleFactor()*sqrt(bornCXComb()->lastCentralScale());
+ return hardScaleFactor()*sqrt(bornCXComb()->lastShowerScale());
}
}
bool ShowerApproximation::isInShowerPhasespace() const {
if ( !dipole()->isAboveCutoff() )
return false;
if ( !restrictPhasespace() )
return true;
InvertedTildeKinematics& kinematics =
const_cast<InvertedTildeKinematics&>(*dipole()->invertedTildeKinematics());
tcStdXCombPtr tmpreal = kinematics.realXComb();
tcStdXCombPtr tmpborn = kinematics.bornXComb();
Ptr<SubtractionDipole>::tptr tmpdip = kinematics.dipole();
Energy hard = dipole()->showerHardScale();
Energy pt = dipole()->lastPt();
double z = dipole()->lastZ();
pair<double,double> zbounds(0.,1.);
kinematics.dipole(const_ptr_cast<Ptr<SubtractionDipole>::tptr>(theDipole));
kinematics.prepare(realCXComb(),bornCXComb());
if ( pt > hard ) {
kinematics.dipole(tmpdip);
kinematics.prepare(tmpreal,tmpborn);
return false;
}
try {
zbounds = kinematics.zBounds(pt,hard);
} catch(...) {
kinematics.dipole(tmpdip);
kinematics.prepare(tmpreal,tmpborn);
throw;
}
kinematics.dipole(tmpdip);
kinematics.prepare(tmpreal,tmpborn);
return z > zbounds.first && z < zbounds.second;
}
Energy2 ShowerApproximation::showerEmissionScale() const {
Energy2 mur = sqr(dipole()->lastPt());
if ( dipole()->bornEmitter() > 1 &&
dipole()->bornSpectator() > 1 ) {
return mur + sqr(ffScreeningScale());
} else if ( ( dipole()->bornEmitter() > 1 &&
dipole()->bornSpectator() < 2 ) ||
( dipole()->bornEmitter() < 2 &&
dipole()->bornSpectator() > 1 ) ) {
return mur + sqr(fiScreeningScale());
} else {
assert(dipole()->bornEmitter() < 2 &&
dipole()->bornSpectator() < 2);
return mur + sqr(iiScreeningScale());
}
return mur;
}
Energy2 ShowerApproximation::bornRenormalizationScale() const {
return
sqr(dipole()->underlyingBornME()->renormalizationScaleFactor()) *
dipole()->underlyingBornME()->renormalizationScale();
}
Energy2 ShowerApproximation::bornFactorizationScale() const {
return
sqr(dipole()->underlyingBornME()->factorizationScaleFactor()) *
dipole()->underlyingBornME()->factorizationScale();
}
Energy2 ShowerApproximation::realRenormalizationScale() const {
return
sqr(dipole()->realEmissionME()->renormalizationScaleFactor()) *
dipole()->realEmissionME()->renormalizationScale();
}
Energy2 ShowerApproximation::realFactorizationScale() const {
return
sqr(dipole()->realEmissionME()->factorizationScaleFactor()) *
dipole()->realEmissionME()->factorizationScale();
}
double ShowerApproximation::bornPDFWeight(Energy2 muf) const {
if ( !bornCXComb()->mePartonData()[0]->coloured() &&
!bornCXComb()->mePartonData()[1]->coloured() )
return 1.;
if ( muf < sqr(theFactorizationScaleFreeze) )
muf = sqr(theFactorizationScaleFreeze);
double pdfweight = 1.;
if ( bornCXComb()->mePartonData()[0]->coloured() &&
dipole()->underlyingBornME()->havePDFWeight1() )
pdfweight *= dipole()->underlyingBornME()->pdf1(muf,theExtrapolationX);
if ( bornCXComb()->mePartonData()[1]->coloured() &&
dipole()->underlyingBornME()->havePDFWeight2() )
pdfweight *= dipole()->underlyingBornME()->pdf2(muf,theExtrapolationX);
return pdfweight;
}
double ShowerApproximation::realPDFWeight(Energy2 muf) const {
if ( !realCXComb()->mePartonData()[0]->coloured() &&
!realCXComb()->mePartonData()[1]->coloured() )
return 1.;
if ( muf < sqr(theFactorizationScaleFreeze) )
muf = sqr(theFactorizationScaleFreeze);
double pdfweight = 1.;
if ( realCXComb()->mePartonData()[0]->coloured() &&
dipole()->realEmissionME()->havePDFWeight1() )
pdfweight *= dipole()->realEmissionME()->pdf1(muf,theExtrapolationX);
if ( realCXComb()->mePartonData()[1]->coloured() &&
dipole()->realEmissionME()->havePDFWeight2() )
pdfweight *= dipole()->realEmissionME()->pdf2(muf,theExtrapolationX);
return pdfweight;
}
double ShowerApproximation::scaleWeight(int rScale, int bScale, int eScale) const {
double emissionAlpha = 1.;
Energy2 emissionScale = ZERO;
Energy2 showerscale = ZERO;
if ( eScale == showerScale || bScale == showerScale || eScale == showerScale ) {
showerscale = showerRenormalizationScale();
if ( showerscale < sqr(theRenormalizationScaleFreeze) )
showerscale = sqr(theFactorizationScaleFreeze);
}
if ( eScale == showerScale ) {
emissionAlpha = SM().alphaS(showerscale);
emissionScale = showerFactorizationScale();
} else if ( eScale == realScale ) {
emissionAlpha = dipole()->realEmissionME()->lastXComb().lastAlphaS();
emissionScale = dipole()->realEmissionME()->lastScale();
} else if ( eScale == bornScale ) {
emissionAlpha = dipole()->underlyingBornME()->lastXComb().lastAlphaS();
emissionScale = dipole()->underlyingBornME()->lastScale();
}
double emissionPDF = realPDFWeight(emissionScale);
double couplingFactor = 1.;
if ( bScale != rScale ) {
double bornAlpha = 1.;
if ( bScale == showerScale ) {
bornAlpha = SM().alphaS(showerscale);
} else if ( bScale == realScale ) {
bornAlpha = dipole()->realEmissionME()->lastXComb().lastAlphaS();
} else if ( bScale == bornScale ) {
bornAlpha = dipole()->underlyingBornME()->lastXComb().lastAlphaS();
}
double realAlpha = 1.;
if ( rScale == showerScale ) {
realAlpha = SM().alphaS(showerscale);
} else if ( rScale == realScale ) {
realAlpha = dipole()->realEmissionME()->lastXComb().lastAlphaS();
} else if ( rScale == bornScale ) {
realAlpha = dipole()->underlyingBornME()->lastXComb().lastAlphaS();
}
couplingFactor *=
pow(realAlpha/bornAlpha,(double)(dipole()->underlyingBornME()->orderInAlphaS()));
}
Energy2 hardScale = ZERO;
if ( bScale == showerScale ) {
hardScale = showerFactorizationScale();
} else if ( bScale == realScale ) {
hardScale = dipole()->realEmissionME()->lastScale();
} else if ( bScale == bornScale ) {
hardScale = dipole()->underlyingBornME()->lastScale();
}
double bornPDF = bornPDFWeight(hardScale);
if ( bornPDF < 1e-8 )
bornPDF = 0.0;
if ( emissionPDF < 1e-8 )
emissionPDF = 0.0;
if ( emissionPDF == 0.0 || bornPDF == 0.0 )
return 0.0;
return
emissionAlpha * emissionPDF *
couplingFactor / bornPDF;
}
double ShowerApproximation::channelWeight(int emitter, int emission,
int spectator, int) const {
double cfac = 1.;
double Nc = generator()->standardModel()->Nc();
if (realCXComb()->mePartonData()[emitter]->iColour() == PDT::Colour8){
if (realCXComb()->mePartonData()[emission]->iColour() == PDT::Colour8)
cfac = Nc;
else if ( realCXComb()->mePartonData()[emission]->iColour() == PDT::Colour3 ||
realCXComb()->mePartonData()[emission]->iColour() == PDT::Colour3bar)
cfac = 0.5;
else assert(false);
}
else if ((realCXComb()->mePartonData()[emitter] ->iColour() == PDT::Colour3 ||
realCXComb()->mePartonData()[emitter] ->iColour() == PDT::Colour3bar))
cfac = (sqr(Nc)-1.)/(2.*Nc);
else assert(false);
// do the most simple thing for the time being; needs fixing later
if ( realCXComb()->mePartonData()[emission]->id() == ParticleID::g ) {
Energy2 pipk =
realCXComb()->meMomenta()[emitter] * realCXComb()->meMomenta()[spectator];
Energy2 pipj =
realCXComb()->meMomenta()[emitter] * realCXComb()->meMomenta()[emission];
Energy2 pjpk =
realCXComb()->meMomenta()[emission] * realCXComb()->meMomenta()[spectator];
return cfac *GeV2 * pipk / ( pipj * ( pipj + pjpk ) );
}
return
cfac * GeV2 / (realCXComb()->meMomenta()[emitter] * realCXComb()->meMomenta()[emission]);
}
double ShowerApproximation::channelWeight() const {
double currentChannel = channelWeight(dipole()->realEmitter(),
dipole()->realEmission(),
dipole()->realSpectator(),
dipole()->bornEmitter());
if ( currentChannel == 0. )
return 0.;
double sum = 0.;
for ( vector<Ptr<SubtractionDipole>::tptr>::const_iterator dip =
dipole()->partnerDipoles().begin();
dip != dipole()->partnerDipoles().end(); ++dip )
sum += channelWeight((**dip).realEmitter(),
(**dip).realEmission(),
(**dip).realSpectator(),
(**dip).bornEmitter());
assert(sum > 0.0);
return currentChannel / sum;
}
// If needed, insert default implementations of virtual function defined
// in the InterfacedBase class here (using ThePEG-interfaced-impl in Emacs).
void ShowerApproximation::persistentOutput(PersistentOStream & os) const {
os << theLargeNBasis
<< theBornXComb << theRealXComb << theTildeXCombs << theDipole << theBelowCutoff
<< ounit(theFFPtCut,GeV) << ounit(theFFScreeningScale,GeV)
<< ounit(theFIPtCut,GeV) << ounit(theFIScreeningScale,GeV)
<< ounit(theIIPtCut,GeV) << ounit(theIIScreeningScale,GeV)
<< ounit(theSafeCut,GeV)
<< theRestrictPhasespace << theHardScaleFactor
<< theRenormalizationScaleFactor << theFactorizationScaleFactor
<< theExtrapolationX
<< theRealEmissionScaleInSubtraction << theBornScaleInSubtraction
<< theEmissionScaleInSubtraction << theRealEmissionScaleInSplitting
<< theBornScaleInSplitting << theEmissionScaleInSplitting
<< ounit(theRenormalizationScaleFreeze,GeV)
<< ounit(theFactorizationScaleFreeze,GeV) << maxPtIsMuF
<< theHardScaleProfile;
}
void ShowerApproximation::persistentInput(PersistentIStream & is, int) {
is >> theLargeNBasis
>> theBornXComb >> theRealXComb >> theTildeXCombs >> theDipole >> theBelowCutoff
>> iunit(theFFPtCut,GeV) >> iunit(theFFScreeningScale,GeV)
>> iunit(theFIPtCut,GeV) >> iunit(theFIScreeningScale,GeV)
>> iunit(theIIPtCut,GeV) >> iunit(theIIScreeningScale,GeV)
>> iunit(theSafeCut,GeV)
>> theRestrictPhasespace >> theHardScaleFactor
>> theRenormalizationScaleFactor >> theFactorizationScaleFactor
>> theExtrapolationX
>> theRealEmissionScaleInSubtraction >> theBornScaleInSubtraction
>> theEmissionScaleInSubtraction >> theRealEmissionScaleInSplitting
>> theBornScaleInSplitting >> theEmissionScaleInSplitting
>> iunit(theRenormalizationScaleFreeze,GeV)
>> iunit(theFactorizationScaleFreeze,GeV) >> maxPtIsMuF
>> theHardScaleProfile;
}
// *** Attention *** The following static variable is needed for the type
// description system in ThePEG. Please check that the template arguments
// are correct (the class and its base class), and that the constructor
// arguments are correct (the class name and the name of the dynamically
// loadable library where the class implementation can be found).
DescribeAbstractClass<ShowerApproximation,HandlerBase>
describeHerwigShowerApproximation("Herwig::ShowerApproximation", "Herwig.so");
void ShowerApproximation::Init() {
static ClassDocumentation<ShowerApproximation> documentation
("ShowerApproximation describes the shower emission to be used "
"in NLO matching.");
static Parameter<ShowerApproximation,Energy> interfaceFFPtCut
("FFPtCut",
"Set the pt infrared cutoff",
&ShowerApproximation::theFFPtCut, GeV, 1.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,Energy> interfaceFIPtCut
("FIPtCut",
"Set the pt infrared cutoff",
&ShowerApproximation::theFIPtCut, GeV, 1.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,Energy> interfaceIIPtCut
("IIPtCut",
"Set the pt infrared cutoff",
&ShowerApproximation::theIIPtCut, GeV, 1.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,Energy> interfaceSafeCut
("SafeCut",
"Set the enhanced infrared cutoff for the Matching.",
&ShowerApproximation::theSafeCut, GeV, 0.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,Energy> interfaceFFScreeningScale
("FFScreeningScale",
"Set the screening scale",
&ShowerApproximation::theFFScreeningScale, GeV, 0.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,Energy> interfaceFIScreeningScale
("FIScreeningScale",
"Set the screening scale",
&ShowerApproximation::theFIScreeningScale, GeV, 0.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,Energy> interfaceIIScreeningScale
("IIScreeningScale",
"Set the screening scale",
&ShowerApproximation::theIIScreeningScale, GeV, 0.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Switch<ShowerApproximation,bool> interfaceRestrictPhasespace
("RestrictPhasespace",
"Switch on or off phasespace restrictions",
&ShowerApproximation::theRestrictPhasespace, true, false, false);
static SwitchOption interfaceRestrictPhasespaceOn
(interfaceRestrictPhasespace,
"On",
"Perform phasespace restrictions",
true);
static SwitchOption interfaceRestrictPhasespaceOff
(interfaceRestrictPhasespace,
"Off",
"Do not perform phasespace restrictions",
false);
static Parameter<ShowerApproximation,double> interfaceHardScaleFactor
("HardScaleFactor",
"The hard scale factor.",
&ShowerApproximation::theHardScaleFactor, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,double> interfaceRenormalizationScaleFactor
("RenormalizationScaleFactor",
"The hard scale factor.",
&ShowerApproximation::theRenormalizationScaleFactor, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,double> interfaceFactorizationScaleFactor
("FactorizationScaleFactor",
"The hard scale factor.",
&ShowerApproximation::theFactorizationScaleFactor, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,double> interfaceExtrapolationX
("ExtrapolationX",
"The x from which on extrapolation should be performed.",
&ShowerApproximation::theExtrapolationX, 1.0, 0.0, 1.0,
false, false, Interface::limited);
static Switch<ShowerApproximation,int> interfaceRealEmissionScaleInSubtraction
("RealEmissionScaleInSubtraction",
"Set the scale choice for the real emission cross section in the matching subtraction.",
&ShowerApproximation::theRealEmissionScaleInSubtraction, showerScale, false, false);
static SwitchOption interfaceRealEmissionScaleInSubtractionRealScale
(interfaceRealEmissionScaleInSubtraction,
"RealScale",
"Use the real emission scale.",
realScale);
static SwitchOption interfaceRealEmissionScaleInSubtractionBornScale
(interfaceRealEmissionScaleInSubtraction,
"BornScale",
"Use the Born scale.",
bornScale);
static SwitchOption interfaceRealEmissionScaleInSubtractionShowerScale
(interfaceRealEmissionScaleInSubtraction,
"ShowerScale",
"Use the shower scale",
showerScale);
static Switch<ShowerApproximation,int> interfaceBornScaleInSubtraction
("BornScaleInSubtraction",
"Set the scale choice for the Born cross section in the matching subtraction.",
&ShowerApproximation::theBornScaleInSubtraction, showerScale, false, false);
static SwitchOption interfaceBornScaleInSubtractionRealScale
(interfaceBornScaleInSubtraction,
"RealScale",
"Use the real emission scale.",
realScale);
static SwitchOption interfaceBornScaleInSubtractionBornScale
(interfaceBornScaleInSubtraction,
"BornScale",
"Use the Born scale.",
bornScale);
static SwitchOption interfaceBornScaleInSubtractionShowerScale
(interfaceBornScaleInSubtraction,
"ShowerScale",
"Use the shower scale",
showerScale);
static Switch<ShowerApproximation,int> interfaceEmissionScaleInSubtraction
("EmissionScaleInSubtraction",
"Set the scale choice for the emission in the matching subtraction.",
&ShowerApproximation::theEmissionScaleInSubtraction, showerScale, false, false);
static SwitchOption interfaceEmissionScaleInSubtractionRealScale
(interfaceEmissionScaleInSubtraction,
"RealScale",
"Use the real emission scale.",
realScale);
static SwitchOption interfaceEmissionScaleInSubtractionEmissionScale
(interfaceEmissionScaleInSubtraction,
"BornScale",
"Use the Born scale.",
bornScale);
static SwitchOption interfaceEmissionScaleInSubtractionShowerScale
(interfaceEmissionScaleInSubtraction,
"ShowerScale",
"Use the shower scale",
showerScale);
static Switch<ShowerApproximation,int> interfaceRealEmissionScaleInSplitting
("RealEmissionScaleInSplitting",
"Set the scale choice for the real emission cross section in the splitting.",
&ShowerApproximation::theRealEmissionScaleInSplitting, showerScale, false, false);
static SwitchOption interfaceRealEmissionScaleInSplittingRealScale
(interfaceRealEmissionScaleInSplitting,
"RealScale",
"Use the real emission scale.",
realScale);
static SwitchOption interfaceRealEmissionScaleInSplittingBornScale
(interfaceRealEmissionScaleInSplitting,
"BornScale",
"Use the Born scale.",
bornScale);
static SwitchOption interfaceRealEmissionScaleInSplittingShowerScale
(interfaceRealEmissionScaleInSplitting,
"ShowerScale",
"Use the shower scale",
showerScale);
static Switch<ShowerApproximation,int> interfaceBornScaleInSplitting
("BornScaleInSplitting",
"Set the scale choice for the Born cross section in the splitting.",
&ShowerApproximation::theBornScaleInSplitting, showerScale, false, false);
static SwitchOption interfaceBornScaleInSplittingRealScale
(interfaceBornScaleInSplitting,
"RealScale",
"Use the real emission scale.",
realScale);
static SwitchOption interfaceBornScaleInSplittingBornScale
(interfaceBornScaleInSplitting,
"BornScale",
"Use the Born scale.",
bornScale);
static SwitchOption interfaceBornScaleInSplittingShowerScale
(interfaceBornScaleInSplitting,
"ShowerScale",
"Use the shower scale",
showerScale);
static Switch<ShowerApproximation,int> interfaceEmissionScaleInSplitting
("EmissionScaleInSplitting",
"Set the scale choice for the emission in the splitting.",
&ShowerApproximation::theEmissionScaleInSplitting, showerScale, false, false);
static SwitchOption interfaceEmissionScaleInSplittingRealScale
(interfaceEmissionScaleInSplitting,
"RealScale",
"Use the real emission scale.",
realScale);
static SwitchOption interfaceEmissionScaleInSplittingEmissionScale
(interfaceEmissionScaleInSplitting,
"BornScale",
"Use the Born scale.",
bornScale);
static SwitchOption interfaceEmissionScaleInSplittingShowerScale
(interfaceEmissionScaleInSplitting,
"ShowerScale",
"Use the shower scale",
showerScale);
static Parameter<ShowerApproximation,Energy> interfaceRenormalizationScaleFreeze
("RenormalizationScaleFreeze",
"The freezing scale for the renormalization scale.",
&ShowerApproximation::theRenormalizationScaleFreeze, GeV, 1.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximation,Energy> interfaceFactorizationScaleFreeze
("FactorizationScaleFreeze",
"The freezing scale for the factorization scale.",
&ShowerApproximation::theFactorizationScaleFreeze, GeV, 1.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Reference<ShowerApproximation,HardScaleProfile> interfaceHardScaleProfile
("HardScaleProfile",
"The hard scale profile to use.",
&ShowerApproximation::theHardScaleProfile, false, false, true, true, false);
static Reference<ShowerApproximation,ColourBasis> interfaceLargeNBasis
("LargeNBasis",
"Set the large-N colour basis implementation.",
&ShowerApproximation::theLargeNBasis, false, false, true, true, false);
static Switch<ShowerApproximation,bool> interfaceMaxPtIsMuF
("MaxPtIsMuF",
"",
&ShowerApproximation::maxPtIsMuF, false, false, false);
static SwitchOption interfaceMaxPtIsMuFYes
(interfaceMaxPtIsMuF,
"Yes",
"",
true);
static SwitchOption interfaceMaxPtIsMuFNo
(interfaceMaxPtIsMuF,
"No",
"",
false);
}
diff --git a/MatrixElement/Matchbox/Matching/ShowerApproximationGenerator.cc b/MatrixElement/Matchbox/Matching/ShowerApproximationGenerator.cc
--- a/MatrixElement/Matchbox/Matching/ShowerApproximationGenerator.cc
+++ b/MatrixElement/Matchbox/Matching/ShowerApproximationGenerator.cc
@@ -1,533 +1,533 @@
// -*- C++ -*-
//
// ShowerApproximationGenerator.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2012 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the ShowerApproximationGenerator class.
//
#include <config.h>
#include "ShowerApproximationGenerator.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/EventRecord/Particle.h"
#include "ThePEG/Repository/UseRandom.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "ThePEG/PDT/EnumParticles.h"
#include "ThePEG/PDF/PartonExtractor.h"
#include "ThePEG/Cuts/Cuts.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
using namespace Herwig;
ShowerApproximationGenerator::ShowerApproximationGenerator()
: thePresamplingPoints(2000), theMaxTry(100000), theFreezeGrid(500000),
theDoCompensate(false) {}
ShowerApproximationGenerator::~ShowerApproximationGenerator() {}
double ShowerApproximationGenerator::generateFraction(tcPDPtr pd, double r, double xmin) const {
if ( pd->coloured() || pd->id() == ParticleID::gamma ) {
return pow(xmin,r);
}
double x0 = 1.e-5;
return 1. + x0 - x0*pow((1.+x0)/x0,r);
}
double ShowerApproximationGenerator::invertFraction(tcPDPtr pd, double x, double xmin) const {
if ( pd->coloured() || pd->id() == ParticleID::gamma ) {
return log(x)/log(xmin);
}
double x0 = 1.e-5;
return log((1.-x+x0)/x0)/log((1.+x0)/x0);
}
bool ShowerApproximationGenerator::prepare(bool didproject) {
tSubProPtr oldSub = lastIncomingXComb->subProcess();
tcStdXCombPtr cIncomingXC = lastIncomingXComb;
bool hasFractions =
thePhasespace->haveX1X2() ||
cIncomingXC->mePartonData().size() == 3;
theLastMomenta.resize(cIncomingXC->mePartonData().size());
if ( !hasFractions )
theLastRandomNumbers.resize(thePhasespace->nDim(cIncomingXC->mePartonData()) + 2);
else
theLastRandomNumbers.resize(thePhasespace->nDim(cIncomingXC->mePartonData()));
if ( !hasFractions ) {
double x1 =
oldSub->incoming().first->momentum().plus() /
lastIncomingXComb->lastParticles().first->momentum().plus();
theLastRandomNumbers[0] = invertFraction(oldSub->incoming().first->dataPtr(),x1,
lastIncomingXComb->cuts()->x1Min());
double x2 =
oldSub->incoming().second->momentum().minus() /
lastIncomingXComb->lastParticles().second->momentum().minus();
theLastRandomNumbers[1] = invertFraction(oldSub->incoming().second->dataPtr(),x2,
lastIncomingXComb->cuts()->x2Min());
}
theLastMomenta = cIncomingXC->meMomenta();
theLastPartons.first =
oldSub->incoming().first->data().produceParticle(oldSub->incoming().first->momentum());
theLastPartons.second =
oldSub->incoming().second->data().produceParticle(oldSub->incoming().second->momentum());
thePhasespace->setXComb(lastIncomingXComb);
// this is a brute force fix for private ticket #241 ; only done to get fixed
// for the release but will need to be looked at in more detail later on by
// cleaning up the XCombs for these cases
if ( theLastMomenta.size() == 3 && didproject ) {
// boost them where they belong so invertKinematics is doing something sensible
Boost toLab = (lastIncomingXComb->lastPartons().first->momentum() +
lastIncomingXComb->lastPartons().second->momentum()).boostVector();
for ( int i = 0; i < 3; ++i )
theLastMomenta[i].boost(toLab);
}
thePhasespace->invertKinematics(theLastMomenta,
!hasFractions ? &theLastRandomNumbers[2] : &theLastRandomNumbers[0]);
theLastBornXComb->clean();
theLastBornXComb->fill(lastIncomingXComb->lastParticles(),theLastPartons,
theLastMomenta,theLastRandomNumbers);
if ( !theLastBornXComb->cuts()->initSubProcess(theLastBornXComb->lastSHat(),
theLastBornXComb->lastY(),
theLastBornXComb->mirror()) )
return false;
theLastBornME->setXComb(theLastBornXComb);
if ( !theLastBornME->generateKinematics(!hasFractions ? &theLastRandomNumbers[2] : &theLastRandomNumbers[0]) )
return false;
CrossSection bornXS = theLastBornME->dSigHatDR();
if ( bornXS == ZERO )
return false;
return true;
}
bool ShowerApproximationGenerator::generate(const vector<double>& r) {
theLastBornXComb->clean();
bool hasFractions =
thePhasespace->haveX1X2() ||
theLastBornXComb->mePartonData().size() == 3;
if ( !hasFractions ) {
double x = generateFraction(theLastPartons.first->dataPtr(),r[0],
lastIncomingXComb->cuts()->x1Min());
Energy Q = lastIncomingXComb->lastParticles().first->momentum().plus();
Energy mass = theLastPartons.first->dataPtr()->mass();
double xi = (sqr(x*Q) - sqr(mass))/(sqr(Q)*x);
Lorentz5Momentum p1(ZERO,ZERO,xi*Q/2.);
p1.setMass(mass); p1.rescaleEnergy();
theLastPartons.first->set5Momentum(p1);
x = generateFraction(theLastPartons.second->dataPtr(),r[1],
lastIncomingXComb->cuts()->x2Min());
Q = lastIncomingXComb->lastParticles().second->momentum().minus();
mass = theLastPartons.second->dataPtr()->mass();
xi = (sqr(x*Q) - sqr(mass))/(sqr(Q)*x);
Lorentz5Momentum p2(ZERO,ZERO,-xi*Q/2.);
p2.setMass(mass); p2.rescaleEnergy();
theLastPartons.second->set5Momentum(p2);
} else {
theLastBornME->setXComb(theLastBornXComb);
theLastBornXComb->lastParticles(lastIncomingXComb->lastParticles());
theLastBornXComb->lastP1P2(make_pair(0.0, 0.0));
theLastBornXComb->lastS(lastIncomingXComb->lastS());
if ( !theLastBornME->generateKinematics(&r[0]) )
return false;
theLastPartons.first->set5Momentum(theLastBornME->lastMEMomenta()[0]);
theLastPartons.second->set5Momentum(theLastBornME->lastMEMomenta()[1]);
}
theLastPresamplingMomenta.resize(theLastMomenta.size());
Boost toCMS =
(theLastPartons.first->momentum() +
theLastPartons.second->momentum()).findBoostToCM();
theLastPresamplingMomenta[0] = theLastPartons.first->momentum();
if ( !hasFractions )
theLastPresamplingMomenta[0].boost(toCMS);
theLastPresamplingMomenta[1] = theLastPartons.second->momentum();
if ( !hasFractions )
theLastPresamplingMomenta[1].boost(toCMS);
if ( hasFractions ) {
for ( size_t k = 2; k < theLastBornME->lastMEMomenta().size(); ++k )
theLastPresamplingMomenta[k] = theLastBornME->lastMEMomenta()[k];
}
theLastBornXComb->fill(lastIncomingXComb->lastParticles(),theLastPartons,
theLastPresamplingMomenta,r);
if ( !theLastBornXComb->cuts()->initSubProcess(theLastBornXComb->lastSHat(),
theLastBornXComb->lastY(),
theLastBornXComb->mirror()) )
return false;
if ( !hasFractions ) {
theLastBornME->setXComb(theLastBornXComb);
if ( !theLastBornME->generateKinematics(&r[2]) )
return false;
}
CrossSection bornXS = theLastBornME->dSigHatDR();
if ( bornXS == ZERO )
return false;
return true;
}
void ShowerApproximationGenerator::restore() {
theLastBornXComb->clean();
bool hasFractions =
thePhasespace->haveX1X2() ||
theLastBornXComb->mePartonData().size() == 3;
if ( !hasFractions ) {
tSubProPtr oldSub = lastIncomingXComb->subProcess();
theLastPartons.first->set5Momentum(oldSub->incoming().first->momentum());
theLastPartons.second->set5Momentum(oldSub->incoming().second->momentum());
} else {
theLastBornME->setXComb(theLastBornXComb);
theLastBornXComb->lastParticles(lastIncomingXComb->lastParticles());
theLastBornXComb->lastP1P2(make_pair(0.0, 0.0));
theLastBornXComb->lastS(lastIncomingXComb->lastS());
theLastBornME->generateKinematics(&theLastRandomNumbers[0]);
theLastPartons.first->set5Momentum(theLastBornME->lastMEMomenta()[0]);
theLastPartons.second->set5Momentum(theLastBornME->lastMEMomenta()[1]);
}
theLastBornXComb->fill(lastIncomingXComb->lastParticles(),theLastPartons,
theLastMomenta,theLastRandomNumbers);
if ( !hasFractions ) {
theLastBornME->setXComb(theLastBornXComb);
theLastBornME->generateKinematics(&theLastRandomNumbers[2]);
}
theLastBornME->dSigHatDR();
}
void ShowerApproximationGenerator::
handle(EventHandler & eh, const tPVector &,
const Hint &) {
theFactory->setHardTreeEmitter(-1);
theFactory->setHardTreeSpectator(-1);
theFactory->setHardTreeSubprocess(SubProPtr());
lastIncomingXComb = dynamic_ptr_cast<tStdXCombPtr>(eh.lastXCombPtr());
if ( !lastIncomingXComb )
throw Exception() << "ShowerApproximationGenerator::handle(): Expecting a standard event handler."
<< Exception::runerror;
bool didproject = false;
if ( lastIncomingXComb->lastProjector() ) {
lastIncomingXComb = lastIncomingXComb->lastProjector();
didproject = true;
}
const StandardXComb& xc = *lastIncomingXComb;
map<cPDVector,set<Ptr<ShowerApproximationKernel>::ptr> >::const_iterator
kernelit = theKernelMap.find(xc.mePartonData());
if ( kernelit == theKernelMap.end() ) {
list<MatchboxFactory::SplittingChannel> channels =
theFactory->getSplittingChannels(lastIncomingXComb);
set<Ptr<ShowerApproximationKernel>::ptr> newKernels;
for ( list<MatchboxFactory::SplittingChannel>::const_iterator c =
channels.begin(); c != channels.end(); ++c ) {
Ptr<ShowerApproximationKernel>::ptr kernel =
new_ptr(ShowerApproximationKernel());
kernel->setBornXComb(c->bornXComb);
kernel->setRealXComb(c->realXComb);
kernel->setTildeXCombs(c->tildeXCombs);
kernel->setDipole(c->dipole);
kernel->showerApproximation(theShowerApproximation);
kernel->presamplingPoints(thePresamplingPoints);
kernel->maxtry(theMaxTry);
kernel->freezeGrid(theFreezeGrid);
kernel->showerApproximationGenerator(this);
kernel->doCompensate(theDoCompensate);
if ( kernel->dipole()->bornEmitter() > 1 &&
kernel->dipole()->bornSpectator() > 1 ) {
kernel->ptCut(ffPtCut());
} else if ( ( kernel->dipole()->bornEmitter() > 1 &&
kernel->dipole()->bornSpectator() < 2 ) ||
( kernel->dipole()->bornEmitter() < 2 &&
kernel->dipole()->bornSpectator() > 1 ) ) {
kernel->ptCut(fiPtCut());
} else {
assert(kernel->dipole()->bornEmitter() < 2 &&
kernel->dipole()->bornSpectator() < 2);
kernel->ptCut(iiPtCut());
}
newKernels.insert(kernel);
}
theKernelMap[xc.mePartonData()] = newKernels;
kernelit = theKernelMap.find(xc.mePartonData());
}
if ( kernelit->second.empty() )
return;
const set<Ptr<ShowerApproximationKernel>::ptr>& kernels = kernelit->second;
theLastBornME = (**kernels.begin()).dipole()->underlyingBornME();
if ( theLastBornME->phasespace()->wantCMS() != thePhasespace->wantCMS() ) {
throw Exception() << "Mismatch in centre-of-mass-system requirements of hard matrix element phasespace ("
<< (theLastBornME->phasespace()->wantCMS()?"true":"false")
<< ") and shower approximation phasespace ("
<< (thePhasespace->wantCMS()?"true":"false") << ")"
<< Exception::abortnow;
}
theLastBornME->phasespace(thePhasespace);
theLastBornXComb = (**kernels.begin()).bornXComb();
if ( !prepare(didproject) )
return;
Energy winnerPt = ZERO;
Ptr<ShowerApproximationKernel>::ptr winnerKernel;
try {
for ( set<Ptr<ShowerApproximationKernel>::ptr>::const_iterator k =
kernels.begin(); k != kernels.end(); ++k ) {
if ( (**k).generate() != 0. && (*k)->dipole()->lastPt() > winnerPt){
winnerKernel = *k;
winnerPt = winnerKernel->dipole()->lastPt();
}
}
} catch(ShowerApproximationKernel::MaxTryException&) {
throw Exception() << "Too many tries needed to generate the matrix element correction in '"
<< name() << "'" << Exception::eventerror;
}
if ( !winnerKernel || winnerPt == ZERO )
return;
//Hardest emission should be this one.
- winnerKernel->realXComb()->lastCentralScale(sqr(winnerPt));
- winnerKernel->bornXComb()->lastCentralScale(sqr(winnerPt));
- lastIncomingXComb->lastCentralScale(sqr(winnerPt));
+ winnerKernel->realXComb()->lastShowerScale(sqr(winnerPt));
+ winnerKernel->bornXComb()->lastShowerScale(sqr(winnerPt));
+ lastIncomingXComb->lastShowerScale(sqr(winnerPt));
SubProPtr oldSub = lastIncomingXComb->subProcess();
SubProPtr newSub;
try {
tcDiagPtr bornDiag = lastIncomingXComb->lastDiagram();
tcDiagPtr realDiag =
winnerKernel->dipole()->realEmissionDiagram(bornDiag);
winnerKernel->realXComb()->externalDiagram(realDiag);
newSub = winnerKernel->realXComb()->construct();
} catch(Veto&) {
return;
}
if ( !theShowerApproximation->needsTruncatedShower() ){
tParticleSet firstS = oldSub->incoming().first->siblings();
assert(firstS.empty() || firstS.size() == 1);
if ( !firstS.empty() ) {
eh.currentStep()->removeParticle(*firstS.begin());
}
tParticleSet secondS = oldSub->incoming().second->siblings();
assert(secondS.empty() || secondS.size() == 1);
if ( !secondS.empty() ) {
eh.currentStep()->removeParticle(*secondS.begin());
}
// prevent the colliding particles from disappearing
// in the initial state and appearing
// in the final state when we've cut off all their
// (physical) children; only applies to the case
// where we have a parton extractor not build from
// noPDF, so check wether the incoming particle
// doesnt equal the incoming parton -- this needs fixing in ThePEG
PPtr dummy = new_ptr(Particle(getParticleData(ParticleID::gamma)));
bool usedDummy = false;
if ( eh.currentStep()->incoming().first != oldSub->incoming().first ) {
eh.currentStep()->addDecayProduct(eh.currentStep()->incoming().first,dummy);
usedDummy = true;
}
if ( eh.currentStep()->incoming().second != oldSub->incoming().second ) {
eh.currentStep()->addDecayProduct(eh.currentStep()->incoming().second,dummy);
usedDummy = true;
}
eh.currentStep()->removeSubProcess(oldSub);
eh.currentStep()->addSubProcess(newSub);
// get rid of the dummy
if ( usedDummy ) {
eh.currentStep()->removeParticle(dummy);
}
eh.select(winnerKernel->realXComb());
winnerKernel->realXComb()->recreatePartonBinInstances(winnerKernel->realXComb()->lastScale());
winnerKernel->realXComb()->refillPartonBinInstances(&(xc.lastRandomNumbers()[0]));
winnerKernel->realXComb()->pExtractor()->constructRemnants(winnerKernel->realXComb()->partonBinInstances(),
newSub, eh.currentStep());
}
else{
theFactory->setHardTreeSubprocess(newSub);
theFactory->setHardTreeEmitter(winnerKernel->dipole()->bornEmitter());
theFactory->setHardTreeSpectator(winnerKernel->dipole()->bornSpectator());
}
}
IBPtr ShowerApproximationGenerator::clone() const {
return new_ptr(*this);
}
IBPtr ShowerApproximationGenerator::fullclone() const {
return new_ptr(*this);
}
// If needed, insert default implementations of virtual function defined
// in the InterfacedBase class here (using ThePEG-interfaced-impl in Emacs).
void ShowerApproximationGenerator::persistentOutput(PersistentOStream & os) const {
os << theShowerApproximation << thePhasespace << theFactory
<< theKernelMap << thePresamplingPoints << theMaxTry << theFreezeGrid
<< lastIncomingXComb << theLastBornME << ounit(theLastMomenta,GeV)
<< ounit(theLastPresamplingMomenta,GeV) << theLastRandomNumbers
<< theLastBornXComb << theLastPartons << theDoCompensate;
}
void ShowerApproximationGenerator::persistentInput(PersistentIStream & is, int) {
is >> theShowerApproximation >> thePhasespace >> theFactory
>> theKernelMap >> thePresamplingPoints >> theMaxTry >> theFreezeGrid
>> lastIncomingXComb >> theLastBornME >> iunit(theLastMomenta,GeV)
>> iunit(theLastPresamplingMomenta,GeV) >> theLastRandomNumbers
>> theLastBornXComb >> theLastPartons >> theDoCompensate;
}
// *** Attention *** The following static variable is needed for the type
// description system in ThePEG. Please check that the template arguments
// are correct (the class and its base class), and that the constructor
// arguments are correct (the class name and the name of the dynamically
// loadable library where the class implementation can be found).
DescribeClass<ShowerApproximationGenerator,StepHandler>
describeHerwigShowerApproximationGenerator("Herwig::ShowerApproximationGenerator", "Herwig.so");
void ShowerApproximationGenerator::Init() {
static ClassDocumentation<ShowerApproximationGenerator> documentation
("ShowerApproximationGenerator generates emissions according to a "
"shower approximation entering a NLO matching.");
static Reference<ShowerApproximationGenerator,ShowerApproximation> interfaceShowerApproximation
("ShowerApproximation",
"Set the shower approximation to sample.",
&ShowerApproximationGenerator::theShowerApproximation, false, false, true, false, false);
static Reference<ShowerApproximationGenerator,MatchboxPhasespace> interfacePhasespace
("Phasespace",
"The phase space generator to use.",
&ShowerApproximationGenerator::thePhasespace, false, false, true, false, false);
static Reference<ShowerApproximationGenerator,MatchboxFactory> interfaceFactory
("Factory",
"The factory object to use.",
&ShowerApproximationGenerator::theFactory, false, false, true, false, false);
static Parameter<ShowerApproximationGenerator,unsigned long> interfacePresamplingPoints
("PresamplingPoints",
"Set the number of presampling points.",
&ShowerApproximationGenerator::thePresamplingPoints, 2000, 1, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximationGenerator,unsigned long> interfaceMaxTry
("MaxTry",
"Set the number of maximum attempts.",
&ShowerApproximationGenerator::theMaxTry, 100000, 1, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerApproximationGenerator,unsigned long> interfaceFreezeGrid
("FreezeGrid",
"",
&ShowerApproximationGenerator::theFreezeGrid, 500000, 1, 0,
false, false, Interface::lowerlim);
static Switch<ShowerApproximationGenerator,bool> interfaceDoCompensate
("DoCompensate",
"",
&ShowerApproximationGenerator::theDoCompensate, false, false, false);
static SwitchOption interfaceDoCompensateYes
(interfaceDoCompensate,
"Yes",
"",
true);
static SwitchOption interfaceDoCompensateNo
(interfaceDoCompensate,
"No",
"",
false);
}
diff --git a/MatrixElement/Matchbox/Phasespace/InvertedTildeKinematics.cc b/MatrixElement/Matchbox/Phasespace/InvertedTildeKinematics.cc
--- a/MatrixElement/Matchbox/Phasespace/InvertedTildeKinematics.cc
+++ b/MatrixElement/Matchbox/Phasespace/InvertedTildeKinematics.cc
@@ -1,213 +1,214 @@
// -*- C++ -*-
//
// InvertedTildeKinematics.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2012 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the InvertedTildeKinematics class.
//
#include <limits>
#include "InvertedTildeKinematics.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "ThePEG/Utilities/Rebinder.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "Herwig/MatrixElement/Matchbox/Phasespace/RandomHelpers.h"
using namespace Herwig;
InvertedTildeKinematics::InvertedTildeKinematics()
: HandlerBase(), theJacobian(0.0), thePtCut(0.0*GeV) {}
InvertedTildeKinematics::~InvertedTildeKinematics() {}
// If needed, insert default implementations of virtual function defined
// in the InterfacedBase class here (using ThePEG-interfaced-impl in Emacs).
Lorentz5Momentum InvertedTildeKinematics::getKt(const Lorentz5Momentum& p1,
const Lorentz5Momentum& p2,
Energy pt,
double phi,
bool spacelike) const {
Lorentz5Momentum P;
if ( !spacelike )
P = p1 + p2;
else
P = p1 - p2;
Energy2 Q2 = abs(P.m2());
Lorentz5Momentum Q =
!spacelike ?
Lorentz5Momentum(ZERO,ZERO,ZERO,sqrt(Q2),sqrt(Q2)) :
Lorentz5Momentum(ZERO,ZERO,sqrt(Q2),ZERO,-sqrt(Q2));
if ( spacelike && Q.z() < P.z() )
Q.setZ(-Q.z());
bool boost =
abs((P-Q).vect().mag2()/GeV2) > 1e-10 ||
abs((P-Q).t()/GeV) > 1e-5;
+ boost &= (P*Q-Q.mass2())/GeV2 > 1e-8;
Lorentz5Momentum inFrame1;
if ( boost )
inFrame1 = p1 + ((P*p1-Q*p1)/(P*Q-Q.mass2()))*(P-Q);
else
inFrame1 = p1;
Energy ptx = inFrame1.x();
Energy pty = inFrame1.y();
Energy q = 2.*inFrame1.z();
Energy Qp = sqrt(4.*(sqr(ptx)+sqr(pty))+sqr(q));
Energy Qy = sqrt(4.*sqr(pty)+sqr(q));
double cPhi = cos(phi);
double sPhi = sqrt(1.-sqr(cPhi));
if ( phi > Constants::pi )
sPhi = -sPhi;
Lorentz5Momentum kt;
if ( !spacelike ) {
kt.setT(ZERO);
kt.setX(pt*Qy*cPhi/Qp);
kt.setY(-pt*(4*ptx*pty*cPhi/Qp+q*sPhi)/Qy);
kt.setZ(2.*pt*(-ptx*q*cPhi/Qp + pty*sPhi)/Qy);
} else {
kt.setT(2.*pt*(ptx*q*cPhi+pty*Qp*sPhi)/(q*Qy));
kt.setX(pt*(Qp*q*cPhi+4.*ptx*pty*sPhi)/(q*Qy));
kt.setY(pt*Qy*sPhi/q);
kt.setZ(ZERO);
}
if ( boost )
kt = kt + ((P*kt-Q*kt)/(P*Q-Q.mass2()))*(P-Q);
kt.setMass(-pt);
kt.rescaleRho();
return kt;
}
Energy InvertedTildeKinematics::lastScale() const {
if ( ( theDipole->bornEmitter() < 2 && theDipole->bornSpectator() > 1 ) ||
( theDipole->bornEmitter() > 1 && theDipole->bornSpectator() < 2 ) ) {
return -(bornEmitterMomentum()-bornSpectatorMomentum()).m();
}
return (bornEmitterMomentum()+bornSpectatorMomentum()).m();
}
pair<Energy,double> InvertedTildeKinematics::generatePtZ(double& jac, const double * r,
double pow) const {
double kappaMin =
ptCut() != ZERO ?
sqr(ptCut()/ptMax()) :
sqr(0.1*GeV/GeV);
double kappa;
using namespace RandomHelpers;
if ( ptCut() > ZERO ) {
pair<double,double> kw = pow==1. ?
generate(inverse(0.,kappaMin,1.),r[0]) :
generate(power(0.,-pow,kappaMin,1.),r[0]);
kappa = kw.first;
jac *= kw.second;
} else {
pair<double,double> kw =
generate((piecewise(),
flat(1e-4,kappaMin),
match(inverse(0.,kappaMin,1.))),r[0]);
kappa = kw.first;
jac *= kw.second;
}
Energy pt = sqrt(kappa)*ptMax();
pair<double,double> zLims = zBounds(pt);
pair<double,double> zw(0,0);// =
// generate(inverse(0.,zLims.first,zLims.second)+
// inverse(1.,zLims.first,zLims.second),r[1]);
// FlatZ = 1
if ( theDipole->samplingZ() == 1 ) {
zw = generate(flat(zLims.first,zLims.second),r[1]);
}
// OneOverZ = 2
if ( theDipole->samplingZ() == 2 ) {
zw = generate(inverse(0.0,zLims.first,zLims.second),r[1]);
}
// OneOverOneMinusZ = 3
if ( theDipole->samplingZ() == 3 ) {
zw = generate(inverse(1.0,zLims.first,zLims.second),r[1]);
}
// OneOverZOneMinusZ = 4
if ( theDipole->samplingZ() == 4 ) {
zw = generate(inverse(0.0,zLims.first,zLims.second) +
inverse(1.0,zLims.first,zLims.second),r[1]);
}
double z = zw.first;
jac *= zw.second;
jac *= sqr(ptMax()/lastScale());
return make_pair(pt,z);
}
void InvertedTildeKinematics::rebind(const TranslationMap & trans) {
theDipole = trans.translate(theDipole);
HandlerBase::rebind(trans);
}
IVector InvertedTildeKinematics::getReferences() {
IVector ret = HandlerBase::getReferences();
ret.push_back(theDipole);
return ret;
}
void InvertedTildeKinematics::persistentOutput(PersistentOStream & os) const {
os << theDipole << theRealXComb << theBornXComb
<< ounit(theRealEmitterMomentum,GeV) << ounit(theRealEmissionMomentum,GeV)
<< ounit(theRealSpectatorMomentum,GeV) << theJacobian
<< ounit(thePtCut,GeV);
}
void InvertedTildeKinematics::persistentInput(PersistentIStream & is, int) {
is >> theDipole >> theRealXComb >> theBornXComb
>> iunit(theRealEmitterMomentum,GeV) >> iunit(theRealEmissionMomentum,GeV)
>> iunit(theRealSpectatorMomentum,GeV) >> theJacobian
>> iunit(thePtCut,GeV);
}
void InvertedTildeKinematics::Init() {
static ClassDocumentation<InvertedTildeKinematics> documentation
("InvertedTildeKinematics is the base class for the inverted 'tilde' "
"kinematics being used for subtraction terms in the "
"formalism of Catani and Seymour.");
}
// *** Attention *** The following static variable is needed for the type
// description system in ThePEG. Please check that the template arguments
// are correct (the class and its base class), and that the constructor
// arguments are correct (the class name and the name of the dynamically
// loadable library where the class implementation can be found).
DescribeAbstractClass<InvertedTildeKinematics,HandlerBase>
describeInvertedTildeKinematics("Herwig::InvertedTildeKinematics", "Herwig.so");
diff --git a/MatrixElement/Matchbox/Utility/MatchboxScaleChoice.h b/MatrixElement/Matchbox/Utility/MatchboxScaleChoice.h
--- a/MatrixElement/Matchbox/Utility/MatchboxScaleChoice.h
+++ b/MatrixElement/Matchbox/Utility/MatchboxScaleChoice.h
@@ -1,161 +1,169 @@
// -*- C++ -*-
//
// MatchboxScaleChoice.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2012 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef Herwig_MatchboxScaleChoice_H
#define Herwig_MatchboxScaleChoice_H
//
// This is the declaration of the MatchboxScaleChoice class.
//
#include "ThePEG/Handlers/HandlerBase.h"
#include "ThePEG/Handlers/StandardXComb.h"
#include "ThePEG/Handlers/LastXCombInfo.h"
namespace Herwig {
using namespace ThePEG;
/**
* \ingroup Matchbox
* \author Simon Platzer
*
* \brief MatchboxScaleChoice is the base class for scale choices
* within Matchbox.
*
*/
class MatchboxScaleChoice: public HandlerBase, public LastXCombInfo<StandardXComb> {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* The default constructor.
*/
MatchboxScaleChoice();
/**
* The destructor.
*/
virtual ~MatchboxScaleChoice();
//@}
public:
/**
* Clone this scale choice.
*/
Ptr<MatchboxScaleChoice>::ptr cloneMe() const {
return dynamic_ptr_cast<Ptr<MatchboxScaleChoice>::ptr>(clone());
}
/**
* Set the XComb object.
*/
virtual void setXComb(tStdXCombPtr xc) {
theLastXComb = xc;
}
/**
* Return the renormalization scale. This default version returns
* shat.
*/
virtual Energy2 renormalizationScale() const {
return theFixedScale == ZERO ? lastSHat() : sqr(theFixedScale);
}
/**
* Return the factorization scale. This default version returns
* shat.
*/
virtual Energy2 factorizationScale() const {
return theFixedScale == ZERO ? lastSHat() : sqr(theFixedScale);
}
/**
* Return the QED renormalization scale. This default version returns
* the Z mass squared.
*/
virtual Energy2 renormalizationScaleQED() const {
if ( theFixedQEDScale != ZERO )
return sqr(theFixedQEDScale);
Energy mZ = getParticleData(ParticleID::Z0)->hardProcessMass();
return mZ*mZ;
}
+ /**
+ * Return the shower hard scale. This default implementation returns the
+ * factorization scale.
+ */
+ virtual Energy2 showerScale() const {
+ return factorizationScale();
+ }
+
public:
/** @name Functions used by the persistent I/O system. */
//@{
/**
* Function used to write out object persistently.
* @param os the persistent output stream written to.
*/
void persistentOutput(PersistentOStream & os) const;
/**
* Function used to read in object persistently.
* @param is the persistent input stream read from.
* @param version the version number of the object when written.
*/
void persistentInput(PersistentIStream & is, int version);
//@}
/**
* The standard Init function used to initialize the interfaces.
* Called exactly once for each class by the class description system
* before the main function starts or
* when this class is dynamically loaded.
*/
static void Init();
protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const;
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const;
//@}
// If needed, insert declarations of virtual function defined in the
// InterfacedBase class here (using ThePEG-interfaced-decl in Emacs).
private:
/**
* A fixed scale choice. If zero, shat will be used.
*/
Energy theFixedScale;
/**
* A fixed QED scale choice. If zero, shat will be used.
*/
Energy theFixedQEDScale;
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
MatchboxScaleChoice & operator=(const MatchboxScaleChoice &);
};
}
#endif /* Herwig_MatchboxScaleChoice_H */
diff --git a/MatrixElement/Powheg/MEPP2GammaGammaPowheg.cc b/MatrixElement/Powheg/MEPP2GammaGammaPowheg.cc
new file mode 100644
--- /dev/null
+++ b/MatrixElement/Powheg/MEPP2GammaGammaPowheg.cc
@@ -0,0 +1,2200 @@
+// -*- C++ -*-
+//
+// This is the implementation of the non-inlined, non-templated member
+// functions of the MEPP2GammaGammaPowheg class.
+//
+
+#include "MEPP2GammaGammaPowheg.h"
+#include "ThePEG/Interface/ClassDocumentation.h"
+#include "ThePEG/Interface/Switch.h"
+#include "ThePEG/Interface/Parameter.h"
+#include "ThePEG/Interface/Reference.h"
+#include "ThePEG/Persistency/PersistentOStream.h"
+#include "ThePEG/Persistency/PersistentIStream.h"
+#include "ThePEG/PDT/EnumParticles.h"
+#include "ThePEG/MatrixElement/Tree2toNDiagram.h"
+#include "ThePEG/Cuts/Cuts.h"
+#include "ThePEG/Utilities/SimplePhaseSpace.h"
+#include "Herwig/Models/StandardModel/StandardModel.h"
+#include "Herwig/Utilities/Maths.h"
+#include "Herwig/Shower/Base/ShowerTree.h"
+#include "Herwig/Shower/Base/ShowerProgenitor.h"
+#include "Herwig/Shower/Base/ShowerParticle.h"
+#include "Herwig/Shower/Base/Branching.h"
+#include "Herwig/Shower/Base/HardTree.h"
+#include "ThePEG/Utilities/DescribeClass.h"
+
+using namespace Herwig;
+
+// The following static variable is needed for the type
+// description system in ThePEG.
+DescribeClass<MEPP2GammaGammaPowheg,Herwig::HwMEBase>
+describeMEPP2GammaGammaPowheg("Herwig::MEPP2GammaGammaPowheg",
+ "HwMEHadron.so HwPowhegMEHadron.so");
+
+unsigned int MEPP2GammaGammaPowheg::orderInAlphaS() const {
+ return 0;
+}
+
+unsigned int MEPP2GammaGammaPowheg::orderInAlphaEW() const {
+ return 2;
+}
+
+IBPtr MEPP2GammaGammaPowheg::clone() const {
+ return new_ptr(*this);
+}
+
+IBPtr MEPP2GammaGammaPowheg::fullclone() const {
+ return new_ptr(*this);
+}
+
+MEPP2GammaGammaPowheg::MEPP2GammaGammaPowheg()
+ : contrib_(1), power_(0.1), process_(0), threeBodyProcess_(0),
+ maxflavour_(5), alphaS_(0.), fixedAlphaS_(false),
+ supressionFunction_(0), supressionScale_(0), lambda_(20.*GeV),
+ preQCDqqbarq_(5.), preQCDqqbarqbar_(0.5), preQCDqg_(50.), preQCDgqbar_(50.),
+ preQEDqqbarq_(40.), preQEDqqbarqbar_(0.5), preQEDqgq_(1.), preQEDgqbarqbar_(1.),
+ minpT_(2.*GeV), scaleChoice_(0), scalePreFactor_(1.)
+{}
+
+void MEPP2GammaGammaPowheg::getDiagrams() const {
+ tcPDPtr gamma = getParticleData(ParticleID::gamma);
+ tcPDPtr g = getParticleData(ParticleID::g);
+ for(int ix=1;ix<=maxflavour_;++ix) {
+ tcPDPtr qk = getParticleData(ix);
+ tcPDPtr qb = qk->CC();
+ // gamma gamma
+ if(process_==0 || process_ == 1) {
+ add(new_ptr((Tree2toNDiagram(3), qk, qk, qb, 1, gamma, 2, gamma, -1)));
+ add(new_ptr((Tree2toNDiagram(3), qk, qk, qb, 2, gamma, 1, gamma, -2)));
+ }
+ // gamma +jet
+ if(process_==0 || process_ == 2) {
+ add(new_ptr((Tree2toNDiagram(3), qk, qb, qb, 1, gamma,
+ 2, g, -4)));
+ add(new_ptr((Tree2toNDiagram(3), qk, qk, qb, 2, gamma,
+ 1, g, -5)));
+ add(new_ptr((Tree2toNDiagram(3), qk, qk, g, 1, gamma,
+ 2, qk, -6)));
+ add(new_ptr((Tree2toNDiagram(2), qk, g, 1, qk, 3, gamma,
+ 3, qk, -7)));
+ add(new_ptr((Tree2toNDiagram(3), g, qb, qb, 2, gamma,
+ 1, qb, -8)));
+ add(new_ptr((Tree2toNDiagram(2), g, qb, 1, qb, 3, gamma,
+ 3, qb, -9)));
+ }
+ // gamma + jet + gamma
+ if((process_==0 && contrib_==1) || process_ == 3) {
+ // gamma + g + gamma
+ if(threeBodyProcess_==0 || threeBodyProcess_==1) {
+ add(new_ptr((Tree2toNDiagram(4), qk, qk, qk, qb, 1, gamma,
+ 2, gamma, 3, g, -10)));
+ add(new_ptr((Tree2toNDiagram(4), qk, qk, qk, qb, 3, gamma,
+ 2, gamma, 1, g, -12)));
+ }
+ // Z + q + gamma
+ if(threeBodyProcess_==0 || threeBodyProcess_==2) {
+ add(new_ptr((Tree2toNDiagram(4),qk,qk,qk,g,1,gamma,2,gamma,3,qk, -20)));
+ add(new_ptr((Tree2toNDiagram(4),qk,qk,qk,g,2,gamma,1,gamma,3,qk, -21)));
+ add(new_ptr((Tree2toNDiagram(3),qk,qk,g,1,gamma,2,qk,5,gamma,5,qk,-22)));
+ }
+ // Z + qbar + gamma
+ if(threeBodyProcess_==0 || threeBodyProcess_==3) {
+ add(new_ptr((Tree2toNDiagram(4),g,qb,qb,qb,3,gamma,2,gamma,1,qb ,-30)));
+ add(new_ptr((Tree2toNDiagram(4),g,qb,qb,qb,2,gamma,3,gamma,1,qb ,-31)));
+ add(new_ptr((Tree2toNDiagram(3),g,qb,qb ,2,gamma,1,qb,5,gamma,5,qb,-32)));
+ }
+ }
+ }
+}
+
+Energy2 MEPP2GammaGammaPowheg::scale() const {
+ Energy2 scale;
+ if(scaleChoice_==0) {
+ Energy pt;
+ if(meMomenta()[2].perp(meMomenta()[0].vect())>=
+ meMomenta()[3].perp(meMomenta()[0].vect())){
+ pt = meMomenta()[2].perp(meMomenta()[0].vect());
+ } else {
+ pt = meMomenta()[3].perp(meMomenta()[0].vect());
+ }
+ scale = sqr(pt);
+ }
+ else if(scaleChoice_==1) {
+ scale = sHat();
+ }
+ return scalePreFactor_*scale;
+}
+
+int MEPP2GammaGammaPowheg::nDim() const {
+ return HwMEBase::nDim() + ( contrib_>=1 ? 3 : 0 );
+}
+
+bool MEPP2GammaGammaPowheg::generateKinematics(const double * r) {
+ // radiative variables
+ if(contrib_>=1) {
+ zTilde_ = r[nDim()-1];
+ vTilde_ = r[nDim()-2];
+ phi_ = Constants::twopi*r[nDim()-3];
+ }
+ // set the jacobian
+ jacobian(1.0);
+ // set up the momenta
+ for ( int i = 2, N = meMomenta().size(); i < N; ++i )
+ meMomenta()[i] = Lorentz5Momentum(ZERO);
+ // generate sHat
+ Energy2 shat(sHat());
+ if(mePartonData().size()==5) {
+ double eps = sqr(meMomenta()[2].mass())/shat;
+ jacobian(jacobian()*(1.-eps));
+ shat *= eps+zTilde_*(1.-eps);
+ }
+ // momenta of the core process
+ double ctmin = -1.0, ctmax = 1.0;
+ Energy q = ZERO;
+ try {
+ q = SimplePhaseSpace::
+ getMagnitude(shat, meMomenta()[2].mass(), ZERO);
+ }
+ catch ( ImpossibleKinematics ) {
+ return false;
+ }
+ Energy e = 0.5*sqrt(shat);
+ Energy2 m22 = meMomenta()[2].mass2();
+ Energy2 e0e2 = 2.0*e*sqrt(sqr(q) + m22);
+ Energy2 e1e2 = 2.0*e*sqrt(sqr(q) + m22);
+ Energy2 e0e3 = 2.0*e*sqrt(sqr(q));
+ Energy2 e1e3 = 2.0*e*sqrt(sqr(q));
+ Energy2 pq = 2.0*e*q;
+ if(mePartonData().size()==4) {
+ Energy2 thmin = lastCuts().minTij(mePartonData()[0], mePartonData()[2]);
+ if ( thmin > ZERO ) ctmax = min(ctmax, (e0e2 - m22 - thmin)/pq);
+ thmin = lastCuts().minTij(mePartonData()[1], mePartonData()[2]);
+ if ( thmin > ZERO ) ctmin = max(ctmin, (thmin + m22 - e1e2)/pq);
+ thmin = lastCuts().minTij(mePartonData()[1], mePartonData()[3]);
+ if ( thmin > ZERO ) ctmax = min(ctmax, (e1e3 - thmin)/pq);
+ thmin = lastCuts().minTij(mePartonData()[0], mePartonData()[3]);
+ if ( thmin > ZERO ) ctmin = max(ctmin, (thmin - e0e3)/pq);
+ Energy ptmin = max(lastCuts().minKT(mePartonData()[2]),
+ lastCuts().minKT(mePartonData()[3]));
+ if ( ptmin > ZERO ) {
+ double ctm = 1.0 - sqr(ptmin/q);
+ if ( ctm <= 0.0 ) return false;
+ ctmin = max(ctmin, -sqrt(ctm));
+ ctmax = min(ctmax, sqrt(ctm));
+ }
+ double ymin2 = lastCuts().minYStar(mePartonData()[2]);
+ double ymax2 = lastCuts().maxYStar(mePartonData()[2]);
+ double ymin3 = lastCuts().minYStar(mePartonData()[3]);
+ double ymax3 = lastCuts().maxYStar(mePartonData()[3]);
+ double ytot = lastCuts().Y() + lastCuts().currentYHat();
+ if ( ymin2 + ytot > -0.9*Constants::MaxRapidity )
+ ctmin = max(ctmin, sqrt(sqr(q) + m22)*tanh(ymin2)/q);
+ if ( ymax2 + ytot < 0.9*Constants::MaxRapidity )
+ ctmax = min(ctmax, sqrt(sqr(q) + m22)*tanh(ymax2)/q);
+ if ( ymin3 + ytot > -0.9*Constants::MaxRapidity )
+ ctmax = min(ctmax, tanh(-ymin3));
+ if ( ymax3 + ytot < 0.9*Constants::MaxRapidity )
+ ctmin = max(ctmin, tanh(-ymax3));
+ if ( ctmin >= ctmax ) return false;
+ }
+ double cth = getCosTheta(ctmin, ctmax, r[0]);
+ Energy pt = q*sqrt(1.0-sqr(cth));
+ phi(rnd(2.0*Constants::pi));
+ meMomenta()[2].setVect(Momentum3( pt*sin(phi()), pt*cos(phi()), q*cth));
+ meMomenta()[3].setVect(Momentum3(-pt*sin(phi()), -pt*cos(phi()), -q*cth));
+ meMomenta()[2].rescaleEnergy();
+ meMomenta()[3].rescaleEnergy();
+ // jacobian
+ tHat(pq*cth + m22 - e0e2);
+ uHat(m22 - shat - tHat());
+ jacobian(pq/shat*Constants::pi*jacobian());
+ // end for 2->2 processes
+ if(mePartonData().size()==4) {
+ vector<LorentzMomentum> out(2);
+ out[0] = meMomenta()[2];
+ out[1] = meMomenta()[3];
+ tcPDVector tout(2);
+ tout[0] = mePartonData()[2];
+ tout[1] = mePartonData()[3];
+ if ( !lastCuts().passCuts(tout, out, mePartonData()[0], mePartonData()[1]) )
+ return false;
+ return true;
+ }
+ // special for 2-3 processes
+ pair<double,double> x = make_pair(lastX1(),lastX2());
+ // partons
+ pair<tcPDPtr,tcPDPtr> partons = make_pair(mePartonData()[0],mePartonData()[1]);
+ // If necessary swap the particle data objects so that
+ // first beam gives the incoming quark
+ if(lastPartons().first ->dataPtr()!=partons.first) {
+ swap(x.first,x.second);
+ }
+ // use vTilde to select the dipole for emission
+ // gamma gamma g processes
+ if(mePartonData()[4]->id()==ParticleID::g) {
+ if(vTilde_<=0.5) {
+ dipole_ = IIQCD1;
+ vTilde_ = 4.*vTilde_;
+ }
+ else {
+ dipole_ = IIQCD2;
+ vTilde_ = 4.*(vTilde_-0.25);
+ }
+ jacobian(2.*jacobian());
+ }
+ // gamma gamma q processes
+ else if(mePartonData()[4]->id()>0&&mePartonData()[4]->id()<6) {
+ if(vTilde_<=1./3.) {
+ dipole_ = IIQCD2;
+ vTilde_ = 3.*vTilde_;
+ }
+ else if(vTilde_<=2./3.) {
+ dipole_ = IFQED1;
+ vTilde_ = 3.*vTilde_-1.;
+ }
+ else {
+ dipole_ = FIQED1;
+ vTilde_ = 3.*vTilde_-2.;
+ }
+ jacobian(3.*jacobian());
+ }
+ // gamma gamma qbar processes
+ else if(mePartonData()[4]->id()<0&&mePartonData()[4]->id()>-6) {
+ if(vTilde_<=1./3.) {
+ dipole_ = IIQCD1;
+ vTilde_ = 3.*vTilde_;
+ }
+ else if(vTilde_<=2./3.) {
+ dipole_ = IFQED2;
+ vTilde_ = 3.*vTilde_-1.;
+ }
+ else {
+ dipole_ = FIQED2;
+ vTilde_ = 3.*vTilde_-2.;
+ }
+ jacobian(3.*jacobian());
+ }
+ else {
+ assert(false);
+ }
+ // initial-initial dipoles
+ if(dipole_<=4) {
+ double z = shat/sHat();
+ double vt = vTilde_*(1.-z);
+ double vJac = 1.-z;
+ Energy pT = sqrt(shat*vt*(1.-vt-z)/z);
+ if(pT<MeV) return false;
+ double rapidity;
+ Energy rs=sqrt(lastS());
+ Lorentz5Momentum pcmf;
+ // emission from first beam
+ if(dipole_<=2) {
+ rapidity = -log(x.second*sqrt(lastS())/pT*vt);
+ pcmf = Lorentz5Momentum(ZERO,ZERO,
+ 0.5*rs*(x.first*z-x.second),
+ 0.5*rs*(x.first*z+x.second));
+ }
+ // emission from second beam
+ else {
+ rapidity = log(x.first *sqrt(lastS())/pT*vt);
+ pcmf = Lorentz5Momentum(ZERO,ZERO,
+ 0.5*rs*(x.first-x.second*z),
+ 0.5*rs*(x.first+x.second*z));
+ }
+ pcmf.rescaleMass();
+ Boost blab(pcmf.boostVector());
+ // emission from the quark radiation
+ vector<Lorentz5Momentum> pnew(5);
+ pnew [0] = Lorentz5Momentum(ZERO,ZERO,0.5*rs*x.first,
+ 0.5*rs*x.first,ZERO);
+ pnew [1] = Lorentz5Momentum(ZERO,ZERO,-0.5*rs*x.second,
+ 0.5*rs*x.second,ZERO) ;
+ pnew [2] = meMomenta()[2];
+ pnew [3] = meMomenta()[3];
+ pnew [4] = Lorentz5Momentum(pT*cos(phi_),pT*sin(phi_),
+ pT*sinh(rapidity),
+ pT*cosh(rapidity), ZERO);
+ pnew[4].rescaleEnergy();
+ Lorentz5Momentum K = pnew [0]+pnew [1]-pnew [4];
+ Lorentz5Momentum Kt = pcmf;
+ Lorentz5Momentum Ksum = K+Kt;
+ Energy2 K2 = K.m2();
+ Energy2 Ksum2 = Ksum.m2();
+ for(unsigned int ix=2;ix<4;++ix) {
+ pnew [ix].boost(blab);
+ pnew [ix] = pnew [ix] - 2.*Ksum*(Ksum*pnew [ix])/Ksum2
+ +2*K*(Kt*pnew [ix])/K2;
+ pnew[ix].rescaleEnergy();
+ }
+ pcmf = Lorentz5Momentum(ZERO,ZERO,
+ 0.5*rs*(x.first-x.second),
+ 0.5*rs*(x.first+x.second));
+ pcmf.rescaleMass();
+ blab = pcmf.boostVector();
+ for(unsigned int ix=0;ix<pnew.size();++ix)
+ pnew[ix].boost(-blab);
+ // phase-space prefactors
+ jacobian(jacobian()*vJac);
+ if(dipole_%2!=0) swap(pnew[3],pnew[4]);
+ for(unsigned int ix=2;ix<meMomenta().size();++ix)
+ meMomenta()[ix] = pnew[ix];
+ }
+ else if(dipole_<=8) {
+ double x = shat/sHat();
+ double z = vTilde_;
+ double x1 = -1./x;
+ double x3 = 1.-z/x;
+ double x2 = 2.+x1-x3;
+ double xT = sqrt(4.*(1-x)*(1-z)*z/x);
+ // rotate the momenta into the Breit-frame
+ Lorentz5Momentum pin,pcmf;
+ if(dipole_<=6) {
+ pin = x*meMomenta()[0];
+ pcmf = pin+meMomenta()[1];
+ }
+ else {
+ pin = x*meMomenta()[1];
+ pcmf = pin+meMomenta()[0];
+ }
+ Boost bv = pcmf.boostVector();
+ meMomenta()[2].boost(bv);
+ meMomenta()[3].boost(bv);
+ Lorentz5Momentum q = meMomenta()[3]-pin;
+ Axis axis(q.vect().unit());
+ LorentzRotation rot;
+ double sinth(sqrt(sqr(axis.x())+sqr(axis.y())));
+ rot = LorentzRotation();
+ if(axis.perp2()>1e-20) {
+ rot.setRotate(-acos(axis.z()),Axis(-axis.y()/sinth,axis.x()/sinth,0.));
+ rot.rotateX(Constants::pi);
+ }
+ if(abs(1.-q.e()/q.vect().mag())>1e-6)
+ rot.boostZ(q.e()/q.vect().mag());
+ pin *= rot;
+ if(pin.perp2()/GeV2>1e-20) {
+ Boost trans = -1./pin.e()*pin.vect();
+ trans.setZ(0.);
+ rot.boost(trans);
+ }
+ rot.invert();
+ Energy Q = sqrt(-q.m2());
+ meMomenta()[4] = rot*Lorentz5Momentum( 0.5*Q*xT*cos(phi_), 0.5*Q*xT*sin(phi_),
+ -0.5*Q*x2,0.5*Q*sqrt(sqr(x2)+sqr(xT)));
+ meMomenta()[3] = rot*Lorentz5Momentum(-0.5*Q*xT*cos(phi_),-0.5*Q*xT*sin(phi_),
+ -0.5*Q*x3,0.5*Q*sqrt(sqr(x3)+sqr(xT)));
+
+ double ratio;
+ if(dipole_<=6) {
+ ratio = 2.*((meMomenta()[3]+meMomenta()[4])*meMomenta()[0])/sHat();
+ }
+ else {
+ ratio = 2.*((meMomenta()[3]+meMomenta()[4])*meMomenta()[1])/sHat();
+ }
+ jacobian(jacobian()*ratio);
+ }
+ else {
+ assert(false);
+ }
+ vector<LorentzMomentum> out(3);
+ tcPDVector tout(3);
+ for(unsigned int ix=0;ix<3;++ix) {
+ out[ix] = meMomenta() [2+ix];
+ tout[ix] = mePartonData()[2+ix];
+ }
+ return lastCuts().passCuts(tout, out, mePartonData()[0], mePartonData()[1]);
+}
+
+double MEPP2GammaGammaPowheg::me2() const {
+ // Born configurations
+ if(mePartonData().size()==4) {
+ // gamma gamma core process
+ if(mePartonData()[3]->id()==ParticleID::gamma) {
+ return 2.*Constants::twopi*alphaEM_*
+ loGammaGammaME(mePartonData(),meMomenta(),true);
+ }
+ // V jet core process
+ else if(mePartonData()[3]->id()==ParticleID::g) {
+ return 2.*Constants::twopi*alphaS_*
+ loGammagME(mePartonData(),meMomenta(),true);
+ }
+ else if(mePartonData()[3]->id()>0) {
+ return 2.*Constants::twopi*alphaS_*
+ loGammaqME(mePartonData(),meMomenta(),true);
+ }
+ else if(mePartonData()[3]->id()<0) {
+ return 2.*Constants::twopi*alphaS_*
+ loGammaqbarME(mePartonData(),meMomenta(),true);
+ }
+ else
+ assert(false);
+ }
+ // hard emission configurations
+ else {
+ if(mePartonData()[4]->id()==ParticleID::g)
+ return sHat()*realGammaGammagME (mePartonData(),meMomenta(),dipole_,Hard,true);
+ else if(mePartonData()[4]->id()>0&&mePartonData()[4]->id()<6)
+ return sHat()*realGammaGammaqME (mePartonData(),meMomenta(),dipole_,Hard,true);
+ else if(mePartonData()[4]->id()<0&&mePartonData()[4]->id()>-6)
+ return sHat()*realGammaGammaqbarME(mePartonData(),meMomenta(),dipole_,Hard,true);
+ else
+ assert(false);
+ }
+}
+
+CrossSection MEPP2GammaGammaPowheg::dSigHatDR() const {
+ // couplings
+ if(!fixedAlphaS_) alphaS_ = SM().alphaS(scale());
+ alphaEM_ = SM().alphaEM();
+ // cross section
+ CrossSection preFactor =
+ jacobian()/(16.0*sqr(Constants::pi)*sHat())*sqr(hbarc);
+ loME_ = me2();
+
+ if( contrib_== 0 || mePartonData().size()==5 ||
+ (mePartonData().size()==4&& mePartonData()[3]->coloured()))
+ return loME_*preFactor;
+ else
+ return NLOWeight()*preFactor;
+}
+
+
+Selector<MEBase::DiagramIndex>
+MEPP2GammaGammaPowheg::diagrams(const DiagramVector & diags) const {
+ if(mePartonData().size()==4) {
+ if(mePartonData()[3]->id()==ParticleID::gamma) {
+
+ Selector<DiagramIndex> sel;
+ for ( DiagramIndex i = 0; i < diags.size(); ++i ){
+ sel.insert(meInfo()[abs(diags[i]->id())], i);
+ }
+ return sel;
+ }
+ else {
+ Selector<DiagramIndex> sel;
+ for ( DiagramIndex i = 0; i < diags.size(); ++i ){
+ sel.insert(meInfo()[abs(diags[i]->id())%2], i);
+ }
+ return sel;
+ }
+ }
+ else {
+ Selector<DiagramIndex> sel;
+ for ( DiagramIndex i = 0; i < diags.size(); ++i ) {
+ if(abs(diags[i]->id()) == 10 && dipole_ == IIQCD2 )
+ sel.insert(1., i);
+ else if(abs(diags[i]->id()) == 12 && dipole_ == IIQCD1 )
+ sel.insert(1., i);
+ else if(abs(diags[i]->id()) == 20 && dipole_ == IIQCD2 )
+ sel.insert(1., i);
+ else if(abs(diags[i]->id()) == 21 && dipole_ == IFQED1 )
+ sel.insert(1., i);
+ else if(abs(diags[i]->id()) == 22 && dipole_ == FIQED1 )
+ sel.insert(1., i);
+ else
+ sel.insert(0., i);
+ }
+ return sel;
+ }
+}
+
+Selector<const ColourLines *>
+MEPP2GammaGammaPowheg::colourGeometries(tcDiagPtr diag) const {
+ // colour lines for V gamma
+ static ColourLines cs("1 -2");
+ static ColourLines ct("1 2 -3");
+ // colour lines for q qbar -> V g
+ static const ColourLines cqqbar[2]={ColourLines("1 -2 5,-3 -5"),
+ ColourLines("1 5,-5 2 -3")};
+ // colour lines for q g -> V q
+ static const ColourLines cqg [2]={ColourLines("1 2 -3,3 5"),
+ ColourLines("1 -2,2 3 5")};
+ // colour lines for g qbar -> V qbar
+ static const ColourLines cgqbar[2]={ColourLines("-3 -2 1,-1 -5"),
+ ColourLines("-2 1,-1 -3 -5")};
+ // colour lines for q qbar -> V gamma g
+ static const ColourLines cqqbarg[4]={ColourLines("1 2 3 7,-4 -7"),
+ ColourLines("1 2 7,-4 3 -7"),
+ ColourLines("1 7,-4 3 2 -7"),
+ ColourLines("1 2 7,-4 3 -7")};
+ // colour lines for q g -> V gamma q
+ static const ColourLines cqgq [3]={ColourLines("1 2 3 -4,4 7"),
+ ColourLines("1 2 3 -4,4 7"),
+ ColourLines("1 2 -3,3 5 7")};
+ // colour lines for gbar -> V gamma qbar
+ static const ColourLines cqbargqbar[3]={ColourLines("1 -2 -3 -4,-1 -7"),
+ ColourLines("1 -2 -3 -4,-1 -7"),
+ ColourLines("1 -2 -3,-1 -5 -7")};
+ Selector<const ColourLines *> sel;
+ switch(abs(diag->id())) {
+ case 1 :case 2 :
+ sel.insert(1.0, &ct);
+ break;
+ case 3 :
+ sel.insert(1.0, &cs);
+ break;
+ case 4 :
+ sel.insert(1.0, &cqqbar[0]);
+ break;
+ case 5:
+ sel.insert(1.0, &cqqbar[1]);
+ break;
+ case 6:
+ sel.insert(1.0, &cqg[0]);
+ break;
+ case 7:
+ sel.insert(1.0, &cqg[1]);
+ break;
+ case 8:
+ sel.insert(1.0, &cgqbar[0]);
+ break;
+ case 9:
+ sel.insert(1.0, &cgqbar[1]);
+ break;
+ case 10: case 11: case 12: case 13:
+ sel.insert(1.0, &cqqbarg[abs(diag->id())-10]);
+ break;
+ case 20: case 21: case 22:
+ sel.insert(1.0, &cqgq[abs(diag->id())-20]);
+ break;
+ case 30: case 31: case 32:
+ sel.insert(1.0, &cqbargqbar[abs(diag->id())-30]);
+ break;
+ default:
+ assert(false);
+ }
+ return sel;
+}
+
+void MEPP2GammaGammaPowheg::persistentOutput(PersistentOStream & os) const {
+ os << FFPvertex_ << FFGvertex_
+ << contrib_ << power_ << gluon_ << prefactor_
+ << process_ << threeBodyProcess_<< maxflavour_
+ << alphaS_ << fixedAlphaS_
+ << supressionFunction_ << supressionScale_ << ounit(lambda_,GeV)
+ << alphaQCD_ << alphaQED_ << ounit(minpT_,GeV)
+ << preQCDqqbarq_ << preQCDqqbarqbar_ << preQCDqg_ << preQCDgqbar_
+ << preQEDqqbarq_ << preQEDqqbarqbar_ << preQEDqgq_ << preQEDgqbarqbar_
+ << scaleChoice_ << scalePreFactor_;
+}
+
+void MEPP2GammaGammaPowheg::persistentInput(PersistentIStream & is, int) {
+ is >> FFPvertex_ >> FFGvertex_
+ >> contrib_ >> power_ >> gluon_ >> prefactor_
+ >> process_ >> threeBodyProcess_ >> maxflavour_
+ >> alphaS_ >> fixedAlphaS_
+ >> supressionFunction_ >> supressionScale_ >> iunit(lambda_,GeV)
+ >> alphaQCD_ >> alphaQED_ >> iunit(minpT_,GeV)
+ >> preQCDqqbarq_ >> preQCDqqbarqbar_ >> preQCDqg_ >> preQCDgqbar_
+ >> preQEDqqbarq_ >> preQEDqqbarqbar_ >> preQEDqgq_ >> preQEDgqbarqbar_
+ >> scaleChoice_ >> scalePreFactor_;
+}
+
+void MEPP2GammaGammaPowheg::Init() {
+
+ static ClassDocumentation<MEPP2GammaGammaPowheg> documentation
+ ("TheMEPP2GammaGammaPowheg class implements gamma gamma production at NLO");
+
+ static Switch<MEPP2GammaGammaPowheg,unsigned int> interfaceProcess
+ ("Process",
+ "Which processes to include",
+ &MEPP2GammaGammaPowheg::process_, 0, false, false);
+ static SwitchOption interfaceProcessAll
+ (interfaceProcess,
+ "All",
+ "Include all the processes",
+ 0);
+ static SwitchOption interfaceProcessGammaGamma
+ (interfaceProcess,
+ "GammaGamma",
+ "Only include gamma gamma",
+ 1);
+ static SwitchOption interfaceProcessVJet
+ (interfaceProcess,
+ "VJet",
+ "Only include gamma + jet",
+ 2);
+ static SwitchOption interfaceProcessHard
+ (interfaceProcess,
+ "Hard",
+ "Only include hard radiation contributions",
+ 3);
+
+ static Switch<MEPP2GammaGammaPowheg,unsigned int> interfaceThreeBodyProcess
+ ("ThreeBodyProcess",
+ "The possible three body processes to include",
+ &MEPP2GammaGammaPowheg::threeBodyProcess_, 0, false, false);
+ static SwitchOption interfaceThreeBodyProcessAll
+ (interfaceThreeBodyProcess,
+ "All",
+ "Include all processes",
+ 0);
+ static SwitchOption interfaceThreeBodyProcessqqbar
+ (interfaceThreeBodyProcess,
+ "qqbar",
+ "Only include q qbar -> gamma gamma g processes",
+ 1);
+ static SwitchOption interfaceThreeBodyProcessqg
+ (interfaceThreeBodyProcess,
+ "qg",
+ "Only include q g -> gamma gamma q processes",
+ 2);
+ static SwitchOption interfaceThreeBodyProcessgqbar
+ (interfaceThreeBodyProcess,
+ "gqbar",
+ "Only include g qbar -> gamma gamma qbar processes",
+ 3);
+
+ static Switch<MEPP2GammaGammaPowheg,unsigned int> interfaceContribution
+ ("Contribution",
+ "Which contributions to the cross section to include",
+ &MEPP2GammaGammaPowheg::contrib_, 1, false, false);
+ static SwitchOption interfaceContributionLeadingOrder
+ (interfaceContribution,
+ "LeadingOrder",
+ "Just generate the leading order cross section",
+ 0);
+ static SwitchOption interfaceContributionPositiveNLO
+ (interfaceContribution,
+ "PositiveNLO",
+ "Generate the positive contribution to the full NLO cross section",
+ 1);
+ static SwitchOption interfaceContributionNegativeNLO
+ (interfaceContribution,
+ "NegativeNLO",
+ "Generate the negative contribution to the full NLO cross section",
+ 2);
+
+ static Parameter<MEPP2GammaGammaPowheg,int> interfaceMaximumFlavour
+ ("MaximumFlavour",
+ "The maximum flavour allowed for the incoming quarks",
+ &MEPP2GammaGammaPowheg::maxflavour_, 5, 1, 5,
+ false, false, Interface::limited);
+
+ static Parameter<MEPP2GammaGammaPowheg,double> interfaceAlphaS
+ ("AlphaS",
+ "The value of alphaS to use if using a fixed alphaS",
+ &MEPP2GammaGammaPowheg::alphaS_, 0.118, 0.0, 0.2,
+ false, false, Interface::limited);
+
+ static Switch<MEPP2GammaGammaPowheg,bool> interfaceFixedAlphaS
+ ("FixedAlphaS",
+ "Use a fixed value of alphaS",
+ &MEPP2GammaGammaPowheg::fixedAlphaS_, false, false, false);
+ static SwitchOption interfaceFixedAlphaSYes
+ (interfaceFixedAlphaS,
+ "Yes",
+ "Use a fixed alphaS",
+ true);
+ static SwitchOption interfaceFixedAlphaSNo
+ (interfaceFixedAlphaS,
+ "No",
+ "Use a running alphaS",
+ false);
+
+ static Switch<MEPP2GammaGammaPowheg,unsigned int> interfaceSupressionFunction
+ ("SupressionFunction",
+ "Choice of the supression function",
+ &MEPP2GammaGammaPowheg::supressionFunction_, 0, false, false);
+ static SwitchOption interfaceSupressionFunctionNone
+ (interfaceSupressionFunction,
+ "None",
+ "Default POWHEG approach",
+ 0);
+ static SwitchOption interfaceSupressionFunctionThetaFunction
+ (interfaceSupressionFunction,
+ "ThetaFunction",
+ "Use theta functions at scale Lambda",
+ 1);
+ static SwitchOption interfaceSupressionFunctionSmooth
+ (interfaceSupressionFunction,
+ "Smooth",
+ "Supress high pT by pt^2/(pt^2+lambda^2)",
+ 2);
+
+ static Parameter<MEPP2GammaGammaPowheg,Energy> interfaceSupressionScale
+ ("SupressionScale",
+ "The square of the scale for the supression function",
+ &MEPP2GammaGammaPowheg::lambda_, GeV, 20.0*GeV, 0.0*GeV, 0*GeV,
+ false, false, Interface::lowerlim);
+
+ static Switch<MEPP2GammaGammaPowheg,unsigned int> interfaceSupressionScaleChoice
+ ("SupressionScaleChoice",
+ "Choice of the supression scale",
+ &MEPP2GammaGammaPowheg::supressionScale_, 0, false, false);
+ static SwitchOption interfaceSupressionScaleChoiceFixed
+ (interfaceSupressionScaleChoice,
+ "Fixed",
+ "Use a fixed scale",
+ 0);
+ static SwitchOption interfaceSupressionScaleChoiceVariable
+ (interfaceSupressionScaleChoice,
+ "Variable",
+ "Use the pT of the hard process as the scale",
+ 1);
+
+ static Reference<MEPP2GammaGammaPowheg,ShowerAlpha> interfaceShowerAlphaQCD
+ ("ShowerAlphaQCD",
+ "Reference to the object calculating the QCD coupling for the shower",
+ &MEPP2GammaGammaPowheg::alphaQCD_, false, false, true, false, false);
+
+ static Reference<MEPP2GammaGammaPowheg,ShowerAlpha> interfaceShowerAlphaQED
+ ("ShowerAlphaQED",
+ "Reference to the object calculating the QED coupling for the shower",
+ &MEPP2GammaGammaPowheg::alphaQED_, false, false, true, false, false);
+
+ static Parameter<MEPP2GammaGammaPowheg,double> interfacepreQCDqqbarq
+ ("preQCDqqbarq",
+ "The constant for the Sudakov overestimate for the "
+ "q qbar -> V Gamma +g with emission from the q",
+ &MEPP2GammaGammaPowheg::preQCDqqbarq_, 23.0, 0.0, 1000.0,
+ false, false, Interface::limited);
+
+ static Parameter<MEPP2GammaGammaPowheg,double> interfacepreQCDqqbarqbar
+ ("preQCDqqbarqbar",
+ "The constant for the Sudakov overestimate for the "
+ "q qbar -> V Gamma +g with emission from the qbar",
+ &MEPP2GammaGammaPowheg::preQCDqqbarqbar_, 23.0, 0.0, 1000.0,
+ false, false, Interface::limited);
+
+ static Switch<MEPP2GammaGammaPowheg,unsigned int> interfaceScaleChoice
+ ("ScaleChoice",
+ "The scale choice to use",
+ &MEPP2GammaGammaPowheg::scaleChoice_, 0, false, false);
+ static SwitchOption interfaceScaleChoicepT
+ (interfaceScaleChoice,
+ "pT",
+ "Use the pT of the photons",
+ 0);
+ static SwitchOption interfaceScaleChoiceMGammaGamma
+ (interfaceScaleChoice,
+ "MGammaGamma",
+ "Use the mass of the photon pair",
+ 1);
+
+ static Parameter<MEPP2GammaGammaPowheg,double> interfaceScalePreFactor
+ ("ScalePreFactor",
+ "Prefactor to change factorization/renormalisation scale",
+ &MEPP2GammaGammaPowheg::scalePreFactor_, 1.0, 0.1, 10.0,
+ false, false, Interface::limited);
+
+
+// prefactor_.push_back(preQCDqg_);
+// prefactor_.push_back(preQCDgqbar_);
+// prefactor_.push_back(preQEDqqbarq_);
+// prefactor_.push_back(preQEDqqbarqbar_);
+// prefactor_.push_back(preQEDqgq_);
+// prefactor_.push_back(preQEDgqbarqbar_);
+}
+
+double MEPP2GammaGammaPowheg::NLOWeight() const {
+ // if leading-order return
+ if(contrib_==0) return loME_;
+ // prefactors
+ CFfact_ = 4./3.*alphaS_/Constants::twopi;
+ TRfact_ = 1./2.*alphaS_/Constants::twopi;
+ // scale
+ Energy2 mu2 = scale();
+ // virtual pieces
+ double virt = CFfact_*subtractedVirtual();
+ // extract the partons and stuff for the real emission
+ // and collinear counter terms
+ // hadrons
+ pair<tcBeamPtr,tcBeamPtr> hadrons=
+ make_pair(dynamic_ptr_cast<tcBeamPtr>(lastParticles().first->dataPtr() ),
+ dynamic_ptr_cast<tcBeamPtr>(lastParticles().second->dataPtr()));
+ // momentum fractions
+ pair<double,double> x = make_pair(lastX1(),lastX2());
+ // partons
+ pair<tcPDPtr,tcPDPtr> partons = make_pair(mePartonData()[0],mePartonData()[1]);
+ // If necessary swap the particle data objects so that
+ // first beam gives the incoming quark
+ if(lastPartons().first ->dataPtr()!=partons.first) {
+ swap(x.first,x.second);
+ swap(hadrons.first,hadrons.second);
+ }
+ // convert the values of z tilde to z
+ pair<double,double> z;
+ pair<double,double> zJac;
+ double rhomax(pow(1.-x.first,1.-power_));
+ double rho = zTilde_*rhomax;
+ z.first = 1.-pow(rho,1./(1.-power_));
+ zJac.first = rhomax*pow(1.-z.first,power_)/(1.-power_);
+ rhomax = pow(1.-x.second,1.-power_);
+ rho = zTilde_*rhomax;
+ z.second = 1.-pow(rho,1./(1.-power_));
+ zJac.second = rhomax*pow(1.-z.second,power_)/(1.-power_);
+ // calculate the PDFs
+ pair<double,double> oldqPDF =
+ make_pair(hadrons.first ->pdf()->xfx(hadrons.first ,partons.first ,scale(),
+ x.first )/x.first ,
+ hadrons.second->pdf()->xfx(hadrons.second,partons.second,scale(),
+ x.second)/x.second);
+ // real/coll q/qbar
+ pair<double,double> newqPDF =
+ make_pair(hadrons.first ->pdf()->xfx(hadrons.first ,partons.first ,scale(),
+ x.first /z.first )*z.first /x.first ,
+ hadrons.second->pdf()->xfx(hadrons.second,partons.second,scale(),
+ x.second/z.second)*z.second/x.second);
+ // real/coll gluon
+ pair<double,double> newgPDF =
+ make_pair(hadrons.first ->pdf()->xfx(hadrons.first ,gluon_,scale(),
+ x.first /z.first )*z.first /x.first ,
+ hadrons.second->pdf()->xfx(hadrons.second,gluon_,scale(),
+ x.second/z.second)*z.second/x.second);
+ // coll terms
+ // g -> q
+ double collGQ = collinearGluon(mu2,zJac.first,z.first,
+ oldqPDF.first,newgPDF.first);
+ // g -> qbar
+ double collGQbar = collinearGluon(mu2,zJac.second,z.second,
+ oldqPDF.second,newgPDF.second);
+ // q -> q
+ double collQQ = collinearQuark(x.first ,mu2,zJac.first ,z.first ,
+ oldqPDF.first ,newqPDF.first );
+ // qbar -> qbar
+ double collQbarQbar = collinearQuark(x.second,mu2,zJac.second,z.second,
+ oldqPDF.second,newqPDF.second);
+ // collinear remnants
+ double coll = collQQ+collQbarQbar+collGQ+collGQbar;
+ // real emission contribution
+ double real1 = subtractedReal(x,z. first,zJac. first,oldqPDF. first,
+ newqPDF. first,newgPDF. first, true);
+ double real2 = subtractedReal(x,z.second,zJac.second,oldqPDF.second,
+ newqPDF.second,newgPDF.second,false);
+ // the total weight
+ double wgt = loME_ + loME_*virt + loME_*coll + real1 + real2;
+ return contrib_ == 1 ? max(0.,wgt) : max(0.,-wgt);
+}
+
+double MEPP2GammaGammaPowheg::loGammaGammaME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first) const {
+ double output(0.);
+ // analytic formula for speed
+ if(!first) {
+ Energy2 th = (momenta[0]-momenta[2]).m2();
+ Energy2 uh = (momenta[0]-momenta[3]).m2();
+ output = 4./3.*Constants::pi*SM().alphaEM(ZERO)*(th/uh+uh/th)*
+ pow(double(particles[0]->iCharge())/3.,4);
+ }
+ // HE code result
+ else {
+ // wavefunctions for the incoming fermions
+ SpinorWaveFunction em_in( momenta[0],particles[0],incoming);
+ SpinorBarWaveFunction ep_in( momenta[1],particles[1],incoming);
+ // wavefunctions for the outgoing bosons
+ VectorWaveFunction v1_out(momenta[2],particles[2],outgoing);
+ VectorWaveFunction v2_out(momenta[3],particles[3],outgoing);
+ vector<SpinorWaveFunction> f1;
+ vector<SpinorBarWaveFunction> a1;
+ vector<VectorWaveFunction> v1,v2;
+ // calculate the wavefunctions
+ for(unsigned int ix=0;ix<2;++ix) {
+ em_in.reset(ix);
+ f1.push_back(em_in);
+ ep_in.reset(ix);
+ a1.push_back(ep_in);
+ v1_out.reset(2*ix);
+ v1.push_back(v1_out);
+ v2_out.reset(2*ix);
+ v2.push_back(v2_out);
+ }
+ vector<double> me(4,0.0);
+ me_.reset(ProductionMatrixElement(PDT::Spin1Half,PDT::Spin1Half,
+ PDT::Spin1,PDT::Spin1));
+ vector<Complex> diag(2,0.0);
+ SpinorWaveFunction inter;
+ for(unsigned int ihel1=0;ihel1<2;++ihel1) {
+ for(unsigned int ihel2=0;ihel2<2;++ihel2) {
+ for(unsigned int ohel1=0;ohel1<2;++ohel1) {
+ for(unsigned int ohel2=0;ohel2<2;++ohel2) {
+ inter = FFPvertex_->evaluate(ZERO,5,f1[ihel1].particle(),
+ f1[ihel1],v1[ohel1]);
+ diag[0] = FFPvertex_->evaluate(ZERO,inter,a1[ihel2],v2[ohel2]);
+ inter = FFPvertex_->evaluate(ZERO,5,f1[ihel1].particle(),
+ f1[ihel1] ,v2[ohel2]);
+ diag[1] = FFPvertex_->evaluate(ZERO,inter,a1[ihel2],v1[ohel1]);
+ // individual diagrams
+ for (size_t ii=0; ii<2; ++ii) me[ii] += std::norm(diag[ii]);
+ // full matrix element
+ diag[0] += diag[1];
+ output += std::norm(diag[0]);
+ // storage of the matrix element for spin correlations
+ me_(ihel1,ihel2,2*ohel1,2*ohel2) = diag[0];
+ }
+ }
+ }
+ }
+ // store diagram info, etc.
+ DVector save(3);
+ for (size_t i = 0; i < 3; ++i) save[i] = 0.25 * me[i];
+ meInfo(save);
+ // spin and colour factors
+ output *= 0.125/3./norm(FFPvertex_->norm());
+ }
+ return output;
+}
+
+double MEPP2GammaGammaPowheg::loGammaqME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first) const {
+ double output(0.);
+ // analytic formula for speed
+ if(!first) {
+ Energy2 sh = (momenta[0]+momenta[1]).m2();
+ Energy2 th = (momenta[0]-momenta[2]).m2();
+ Energy2 uh = (momenta[0]-momenta[3]).m2();
+ output = -1./3./sh/th*(sh*sh+th*th+2.*uh*(sh+th+uh))*
+ 4.*Constants::pi*SM().alphaEM(ZERO)*
+ sqr(particles[0]->iCharge()/3.);
+ }
+ // HE result
+ else {
+ vector<SpinorWaveFunction> fin;
+ vector<VectorWaveFunction> gin;
+ vector<SpinorBarWaveFunction> fout;
+ vector<VectorWaveFunction> vout;
+ SpinorWaveFunction qin (momenta[0],particles[0],incoming);
+ VectorWaveFunction glin(momenta[1],particles[1],incoming);
+ VectorWaveFunction wout(momenta[2],particles[2],outgoing);
+ SpinorBarWaveFunction qout(momenta[3],particles[3],outgoing);
+ // polarization states for the particles
+ for(unsigned int ix=0;ix<2;++ix) {
+ qin.reset(ix) ;
+ fin.push_back(qin);
+ qout.reset(ix);
+ fout.push_back(qout);
+ glin.reset(2*ix);
+ gin.push_back(glin);
+ wout.reset(2*ix);
+ vout.push_back(wout);
+ }
+ me_.reset(ProductionMatrixElement(PDT::Spin1Half,PDT::Spin1,
+ PDT::Spin1,PDT::Spin1Half));
+ // compute the matrix elements
+ double me[3]={0.,0.,0.};
+ Complex diag[2];
+ SpinorWaveFunction inters;
+ SpinorBarWaveFunction interb;
+ for(unsigned int ihel1=0;ihel1<2;++ihel1) {
+ for(unsigned int ihel2=0;ihel2<2;++ihel2) {
+ for(unsigned int ohel1=0;ohel1<2;++ohel1) {
+ // intermediates for the diagrams
+ interb= FFGvertex_->evaluate(scale(),5,particles[3],
+ fout[ohel1],gin[ihel2]);
+ inters= FFGvertex_->evaluate(scale(),5,particles[0],
+ fin[ihel1],gin[ihel2]);
+ for(unsigned int vhel=0;vhel<2;++vhel) {
+ diag[0] = FFPvertex_->evaluate(ZERO,fin[ihel1],interb,vout[vhel]);
+ diag[1] = FFPvertex_->evaluate(ZERO,inters,fout[ohel1],vout[vhel]);
+ // diagram contributions
+ me[1] += norm(diag[0]);
+ me[2] += norm(diag[1]);
+ // total
+ diag[0] += diag[1];
+ me[0] += norm(diag[0]);
+ me_(ihel1,2*ihel2,2*vhel,ohel1) = diag[0];
+ }
+ }
+ }
+ }
+ // results
+ // initial state spin and colour average
+ double colspin = 1./24./4.;
+ // and C_F N_c from matrix element
+ colspin *= 4.;
+ DVector save;
+ for(unsigned int ix=0;ix<3;++ix) {
+ me[ix] *= colspin;
+ if(ix>0) save.push_back(me[ix]);
+ }
+ meInfo(save);
+ output = me[0]/norm(FFGvertex_->norm());
+ }
+ return output;
+}
+
+double MEPP2GammaGammaPowheg::loGammaqbarME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first) const {
+ double output(0.);
+ // analytic formula for speed
+ if(!first) {
+ Energy2 sh = (momenta[0]+momenta[1]).m2();
+ Energy2 uh = (momenta[0]-momenta[2]).m2();
+ Energy2 th = (momenta[0]-momenta[3]).m2();
+ output = -1./3./sh/th*(sh*sh+th*th+2.*uh*(sh+th+uh))*
+ 4.*Constants::pi*SM().alphaEM()*
+ sqr(particles[1]->iCharge()/3.);
+ }
+ // HE result
+ else {
+ vector<SpinorBarWaveFunction> ain;
+ vector<VectorWaveFunction> gin;
+ vector<SpinorWaveFunction> aout;
+ vector<VectorWaveFunction> vout;
+ VectorWaveFunction glin (momenta[0],particles[0],incoming);
+ SpinorBarWaveFunction qbin (momenta[1],particles[1],incoming);
+ VectorWaveFunction wout (momenta[2],particles[2],outgoing);
+ SpinorWaveFunction qbout(momenta[3],particles[3],outgoing);
+ // polarization states for the particles
+ for(unsigned int ix=0;ix<2;++ix) {
+ qbin .reset(ix );
+ ain .push_back(qbin );
+ qbout.reset(ix );
+ aout.push_back(qbout);
+ glin.reset(2*ix);
+ gin.push_back(glin);
+ wout.reset(2*ix);
+ vout.push_back(wout);
+ }
+ // if calculation spin corrections construct the me
+ me_.reset(ProductionMatrixElement(PDT::Spin1,PDT::Spin1Half,
+ PDT::Spin1,PDT::Spin1Half));
+ // compute the matrix elements
+ double me[3]={0.,0.,0.};
+ Complex diag[2];
+ SpinorWaveFunction inters;
+ SpinorBarWaveFunction interb;
+ for(unsigned int ihel1=0;ihel1<2;++ihel1) {
+ for(unsigned int ihel2=0;ihel2<2;++ihel2) {
+ for(unsigned int ohel1=0;ohel1<2;++ohel1) {
+ // intermediates for the diagrams
+ inters= FFGvertex_->evaluate(scale(),5,particles[3],
+ aout[ohel1],gin[ihel1]);
+ interb= FFGvertex_->evaluate(scale(),5,particles[1],
+ ain[ihel2],gin[ihel1]);
+ for(unsigned int vhel=0;vhel<2;++vhel) {
+ diag[0]= FFPvertex_->evaluate(ZERO,inters,ain[ihel2],vout[vhel]);
+ diag[1]= FFPvertex_->evaluate(ZERO,aout[ohel1],interb,vout[vhel]);
+ // diagram contributions
+ me[1] += norm(diag[0]);
+ me[2] += norm(diag[1]);
+ // total
+ diag[0] += diag[1];
+ me[0] += norm(diag[0]);
+ me_(2*ihel1,ihel2,2*vhel,ohel1) = diag[0];
+ }
+ }
+ }
+ }
+ // results
+ // initial state spin and colour average
+ double colspin = 1./24./4.;
+ // and C_F N_c from matrix element
+ colspin *= 4.;
+ DVector save;
+ for(unsigned int ix=0;ix<3;++ix) {
+ me[ix] *= colspin;
+ if(ix>0) save.push_back(me[ix]);
+ }
+ meInfo(save);
+ output = me[0]/norm(FFGvertex_->norm());
+ }
+ return output;
+}
+
+double MEPP2GammaGammaPowheg::loGammagME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first) const {
+ double output(0.);
+ // analytic formula for speed
+ if(!first) {
+ Energy2 uh = (momenta[0]-momenta[2]).m2();
+ Energy2 th = (momenta[0]-momenta[3]).m2();
+ output = 8./9.*double((th*th+uh*uh)/uh/th)*
+ 4.*Constants::pi*SM().alphaEM(ZERO)*
+ sqr(particles[0]->iCharge()/3.);
+ }
+ else {
+ vector<SpinorWaveFunction> fin;
+ vector<SpinorBarWaveFunction> ain;
+ vector<VectorWaveFunction> gout;
+ vector<VectorWaveFunction> vout;
+ SpinorWaveFunction qin (momenta[0],particles[0],incoming);
+ SpinorBarWaveFunction qbin(momenta[1],particles[1],incoming);
+ VectorWaveFunction wout(momenta[2],particles[2],outgoing);
+ VectorWaveFunction glout(momenta[3],particles[3],outgoing);
+ // polarization states for the particles
+ for(unsigned int ix=0;ix<2;++ix) {
+ qin.reset(ix) ;
+ fin.push_back(qin);
+ qbin.reset(ix) ;
+ ain.push_back(qbin);
+ glout.reset(2*ix);
+ gout.push_back(glout);
+ wout.reset(2*ix);
+ vout.push_back(wout);
+ }
+ // if calculation spin corrections construct the me
+ if(first) me_.reset(ProductionMatrixElement(PDT::Spin1Half,PDT::Spin1Half,
+ PDT::Spin1,PDT::Spin1));
+ // compute the matrix elements
+ double me[3]={0.,0.,0.};
+ Complex diag[2];
+ SpinorWaveFunction inters;
+ SpinorBarWaveFunction interb;
+ for(unsigned int ihel1=0;ihel1<2;++ihel1) {
+ for(unsigned int ihel2=0;ihel2<2;++ihel2) {
+ for(unsigned int ohel1=0;ohel1<2;++ohel1) {
+ // intermediates for the diagrams
+ inters= FFGvertex_->evaluate(scale(),5,particles[0],
+ fin[ihel1],gout[ohel1]);
+ interb= FFGvertex_->evaluate(scale(),5,particles[1],
+ ain[ihel2],gout[ohel1]);
+ for(unsigned int vhel=0;vhel<2;++vhel) {
+ diag[0]= FFPvertex_->evaluate(ZERO,fin[ihel1],interb,vout[vhel]);
+ diag[1]= FFPvertex_->evaluate(ZERO,inters,ain[ihel2],vout[vhel]);
+ // diagram contributions
+ me[1] += norm(diag[0]);
+ me[2] += norm(diag[1]);
+ // total
+ diag[0] += diag[1];
+ me[0] += norm(diag[0]);
+ if(first) me_(ihel1,ihel2,vhel,2*ohel1) = diag[0];
+ }
+ }
+ }
+ }
+ // results
+ // initial state spin and colour average
+ double colspin = 1./9./4.;
+ // and C_F N_c from matrix element
+ colspin *= 4.;
+ DVector save;
+ for(unsigned int ix=0;ix<3;++ix) {
+ me[ix] *= colspin;
+ if(ix>0) save.push_back(me[ix]);
+ }
+ meInfo(save);
+ output = me[0]/norm(FFGvertex_->norm());
+ }
+ return output;
+}
+
+InvEnergy2 MEPP2GammaGammaPowheg::
+realGammaGammagME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ DipoleType dipole, RadiationType rad,
+ bool ) const {
+ // matrix element
+ double sum = realME(particles,momenta);
+ // loop over the QCD and QCD dipoles
+ InvEnergy2 dipoles[2];
+ pair<double,double> supress[2];
+ // compute the two dipole terms
+ unsigned int iemit = 4, ihard = 3;
+ double x = (momenta[0]*momenta[1]-momenta[iemit]*momenta[1]-
+ momenta[iemit]*momenta[0])/(momenta[0]*momenta[1]);
+ Lorentz5Momentum Kt = momenta[0]+momenta[1]-momenta[iemit];
+ vector<Lorentz5Momentum> pa(4),pb(4);
+ // momenta for q -> q g/gamma emission
+ pa[0] = x*momenta[0];
+ pa[1] = momenta[1];
+ Lorentz5Momentum K = pa[0]+pa[1];
+ Lorentz5Momentum Ksum = K+Kt;
+ Energy2 K2 = K.m2();
+ Energy2 Ksum2 = Ksum.m2();
+ pa[2] = momenta[2]-2.*Ksum*(Ksum*momenta[2])/Ksum2+2*K*(Kt*momenta[2])/K2;
+ pa[2].setMass(momenta[2].mass());
+ pa[3] = momenta[ihard]
+ -2.*Ksum*(Ksum*momenta[ihard])/Ksum2+2*K*(Kt*momenta[ihard])/K2;
+ pa[3].setMass(ZERO);
+ cPDVector part(particles.begin(),--particles.end());
+ part[3] = particles[ihard];
+ // first leading-order matrix element
+ double lo1 = loGammaGammaME(part,pa);
+ // first dipole
+ dipoles[0] = 1./(momenta[0]*momenta[iemit])/x*(2./(1.-x)-(1.+x))*lo1;
+ supress[0] = supressionFunction(momenta[iemit].perp(),pa[3].perp());
+ // momenta for qbar -> qbar g/gamma emission
+ pb[0] = momenta[0];
+ pb[1] = x*momenta[1];
+ K = pb[0]+pb[1];
+ Ksum = K+Kt;
+ K2 = K.m2();
+ Ksum2 = Ksum.m2();
+ pb[2] = momenta[2]-2.*Ksum*(Ksum*momenta[2])/Ksum2+2*K*(Kt*momenta[2])/K2;
+ pb[2].setMass(momenta[2].mass());
+ pb[3] = momenta[ihard]
+ -2.*Ksum*(Ksum*momenta[ihard])/Ksum2+2*K*(Kt*momenta[ihard])/K2;
+ pb[3].setMass(ZERO);
+ // second LO matrix element
+ double lo2 = loGammaGammaME(part,pb);
+ // second dipole
+ dipoles[1] = 1./(momenta[1]*momenta[iemit])/x*(2./(1.-x)-(1.+x))*lo2;
+ supress[1] = supressionFunction(momenta[iemit].perp(),pb[3].perp());
+ for(unsigned int ix=0;ix<2;++ix) dipoles[ix] *= 4./3.;
+ // denominator for the matrix element
+ InvEnergy2 denom = abs(dipoles[0]) + abs(dipoles[1]);
+ // contribution
+ if( denom==ZERO || dipoles[(dipole-1)/2]==ZERO ) return ZERO;
+ sum *= abs(dipoles[(dipole-1)/2])/denom;
+ // final coupling factors
+ InvEnergy2 output;
+ if(rad==Subtraction) {
+ output = alphaS_*alphaEM_*
+ (sum*UnitRemoval::InvE2*supress[(dipole-1)/2].first
+ - dipoles[(dipole-1)/2]);
+ }
+ else {
+ output = alphaS_*alphaEM_*sum*UnitRemoval::InvE2;
+ if(rad==Hard) output *=supress[(dipole-1)/2].second;
+ else if(rad==Shower) output *=supress[(dipole-1)/2].first ;
+ }
+ return output;
+}
+
+InvEnergy2 MEPP2GammaGammaPowheg::realGammaGammaqME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ DipoleType dipole, RadiationType rad,
+ bool ) const {
+ double sum = realME(particles,momenta);
+ // initial-state QCD dipole
+ double x = (momenta[0]*momenta[1]-momenta[4]*momenta[1]-
+ momenta[4]*momenta[0])/(momenta[0]*momenta[1]);
+ Lorentz5Momentum Kt = momenta[0]+momenta[1]-momenta[4];
+ vector<Lorentz5Momentum> pa(4);
+ pa[0] = momenta[0];
+ pa[1] = x*momenta[1];
+ Lorentz5Momentum K = pa[0]+pa[1];
+ Lorentz5Momentum Ksum = K+Kt;
+ Energy2 K2 = K.m2();
+ Energy2 Ksum2 = Ksum.m2();
+ pa[2] = momenta[2]-2.*Ksum*(Ksum*momenta[2])/Ksum2+2*K*(Kt*momenta[2])/K2;
+ pa[2].setMass(momenta[2].mass());
+ pa[3] = momenta[3]
+ -2.*Ksum*(Ksum*momenta[3])/Ksum2+2*K*(Kt*momenta[3])/K2;
+ pa[3].setMass(ZERO);
+ cPDVector part(particles.begin(),--particles.end());
+ part[1] = particles[4]->CC();
+ double lo1 = loGammaGammaME(part,pa);
+ InvEnergy2 D1 = 0.5/(momenta[1]*momenta[4])/x*(1.-2.*x*(1.-x))*lo1;
+ // initial-final QED dipole
+ vector<Lorentz5Momentum> pb(4);
+ x = 1.-(momenta[3]*momenta[4])/(momenta[4]*momenta[0]+momenta[0]*momenta[3]);
+ pb[3] = momenta[4]+momenta[3]-(1.-x)*momenta[0];
+ pb[0] = x*momenta[0];
+ pb[1] = momenta[1];
+ pb[2] = momenta[2];
+ double z = momenta[0]*momenta[3]/(momenta[0]*momenta[3]+momenta[0]*momenta[4]);
+ part[1] = particles[1];
+ part[3] = particles[4];
+ double lo2 = loGammaqME(part,pb);
+ Energy pT = sqrt(-(pb[0]-pb[3]).m2()*(1.-x)*(1.-z)*z/x);
+ InvEnergy2 DF = 1./(momenta[4]*momenta[3])/x*(1./(1.-x+z)-2.+z)*lo2;
+ InvEnergy2 DI = 1./(momenta[0]*momenta[3])/x*(1./(1.-x+z)-1.-x)*lo2;
+ DI *= sqr(double(particles[0]->iCharge())/3.);
+ DF *= sqr(double(particles[0]->iCharge())/3.);
+ InvEnergy2 denom = abs(D1)+abs(DI)+abs(DF);
+ pair<double,double> supress;
+ InvEnergy2 term;
+ if ( dipole == IFQED1 ) {
+ term = DI;
+ supress = supressionFunction(pT,pb[3].perp());
+ }
+ else if( dipole == FIQED1 ) {
+ term = DF;
+ supress = supressionFunction(pT,pb[3].perp());
+ }
+ else {
+ term = D1;
+ supress = supressionFunction(momenta[4].perp(),pa[3].perp());
+ }
+ if( denom==ZERO || term == ZERO ) return ZERO;
+ sum *= abs(term)/denom;
+ // final coupling factors
+ InvEnergy2 output;
+ if(rad==Subtraction) {
+ output = alphaS_*alphaEM_*
+ (sum*UnitRemoval::InvE2*supress.first - term);
+ }
+ else {
+ output = alphaS_*alphaEM_*sum*UnitRemoval::InvE2;
+ if(rad==Hard) output *= supress.second;
+ else if(rad==Shower) output *= supress.first ;
+ }
+ // final coupling factors
+ return output;
+}
+
+InvEnergy2 MEPP2GammaGammaPowheg::
+realGammaGammaqbarME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ DipoleType dipole, RadiationType rad,
+ bool) const {
+ double sum = realME(particles,momenta);
+ // initial-state QCD dipole
+ double x = (momenta[0]*momenta[1]-momenta[4]*momenta[1]-momenta[4]*momenta[0])/
+ (momenta[0]*momenta[1]);
+ Lorentz5Momentum Kt = momenta[0]+momenta[1]-momenta[4];
+ vector<Lorentz5Momentum> pa(4);
+ pa[0] = x*momenta[0];
+ pa[1] = momenta[1];
+ Lorentz5Momentum K = pa[0]+pa[1];
+ Lorentz5Momentum Ksum = K+Kt;
+ Energy2 K2 = K.m2();
+ Energy2 Ksum2 = Ksum.m2();
+ pa[2] = momenta[2]-2.*Ksum*(Ksum*momenta[2])/Ksum2+2*K*(Kt*momenta[2])/K2;
+ pa[2].setMass(momenta[2].mass());
+ pa[3] = momenta[3]
+ -2.*Ksum*(Ksum*momenta[3])/Ksum2+2*K*(Kt*momenta[3])/K2;
+ pa[3].setMass(ZERO);
+ cPDVector part(particles.begin(),--particles.end());
+ part[0] = particles[4]->CC();
+ double lo1 = loGammaGammaME(part,pa);
+ InvEnergy2 D1 = 0.5/(momenta[0]*momenta[4])/x*(1.-2.*x*(1.-x))*lo1;
+ // initial-final QED dipole
+ vector<Lorentz5Momentum> pb(4);
+ x = 1.-(momenta[3]*momenta[4])/(momenta[4]*momenta[1]+momenta[1]*momenta[3]);
+ pb[3] = momenta[4]+momenta[3]-(1.-x)*momenta[1];
+ pb[0] = momenta[0];
+ pb[1] = x*momenta[1];
+ pb[2] = momenta[2];
+ double z = momenta[1]*momenta[3]/(momenta[1]*momenta[3]+momenta[1]*momenta[4]);
+ part[0] = particles[0];
+ part[3] = particles[4];
+ double lo2 = loGammaqbarME(part,pb);
+ Energy pT = sqrt(-(pb[1]-pb[3]).m2()*(1.-x)*(1.-z)*z/x);
+ InvEnergy2 DF = 1./(momenta[4]*momenta[3])/x*(2./(1.-x+z)-2.+z)*lo2;
+ InvEnergy2 DI = 1./(momenta[0]*momenta[3])/x*(2./(1.-x+z)-1.-x)*lo2;
+ InvEnergy2 term;
+ DI *= sqr(double(particles[1]->iCharge())/3.);
+ DF *= sqr(double(particles[1]->iCharge())/3.);
+ InvEnergy2 denom = abs(D1)+abs(DI)+abs(DF);
+ pair<double,double> supress;
+ if ( dipole == IFQED2 ) {
+ term = DI;
+ supress = supressionFunction(pT,pb[3].perp());
+ }
+ else if( dipole == FIQED2 ) {
+ term = DF;
+ supress = supressionFunction(pT,pb[3].perp());
+ }
+ else {
+ term = D1;
+ supress = supressionFunction(momenta[4].perp(),pa[3].perp());
+ }
+ if( denom==ZERO || dipole==ZERO ) return ZERO;
+ sum *= abs(term)/denom;
+ // final coupling factors
+ InvEnergy2 output;
+ if(rad==Subtraction) {
+ output = alphaS_*alphaEM_*
+ (sum*UnitRemoval::InvE2*supress.first - term);
+ }
+ else {
+ output = alphaS_*alphaEM_*sum*UnitRemoval::InvE2;
+ if(rad==Hard) output *= supress.second;
+ else if(rad==Shower) output *= supress.first ;
+ }
+ // final coupling factors
+ return output;
+}
+
+double MEPP2GammaGammaPowheg::
+realME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta) const {
+ vector<SpinorWaveFunction> qin;
+ vector<SpinorBarWaveFunction> qbarin;
+ vector<VectorWaveFunction> wout,pout,gout;
+ SpinorWaveFunction q_in;
+ SpinorBarWaveFunction qbar_in;
+ VectorWaveFunction g_out;
+ VectorWaveFunction v_out (momenta[2],particles[2],outgoing);
+ VectorWaveFunction p_out (momenta[3],particles[3],outgoing);
+ // q qbar -> gamma gamma g
+ if(particles[4]->id()==ParticleID::g) {
+ q_in = SpinorWaveFunction (momenta[0],particles[0],incoming);
+ qbar_in = SpinorBarWaveFunction (momenta[1],particles[1],incoming);
+ g_out = VectorWaveFunction (momenta[4],particles[4],outgoing);
+ }
+ // q g -> gamma gamma q
+ else if(particles[4]->id()>0) {
+ q_in = SpinorWaveFunction (momenta[0],particles[0],incoming);
+ qbar_in = SpinorBarWaveFunction (momenta[4],particles[4],outgoing);
+ g_out = VectorWaveFunction (momenta[1],particles[1],incoming);
+ }
+ else if(particles[4]->id()<0) {
+ q_in = SpinorWaveFunction (momenta[4],particles[4],outgoing);
+ qbar_in = SpinorBarWaveFunction (momenta[1],particles[1],incoming);
+ g_out = VectorWaveFunction (momenta[0],particles[0],incoming);
+ }
+ else assert(false);
+ for(unsigned int ix=0;ix<2;++ix) {
+ q_in.reset(ix);
+ qin.push_back(q_in);
+ qbar_in.reset(ix);
+ qbarin.push_back(qbar_in);
+ g_out.reset(2*ix);
+ gout.push_back(g_out);
+ p_out.reset(2*ix);
+ pout.push_back(p_out);
+ v_out.reset(2*ix);
+ wout.push_back(v_out);
+ }
+ vector<Complex> diag(6 , 0.);
+ Energy2 mu2 = scale();
+ double sum(0.);
+ for(unsigned int ihel1=0;ihel1<2;++ihel1) {
+ for(unsigned int ihel2=0;ihel2<2;++ihel2) {
+ for(unsigned int whel=0;whel<2;++whel) {
+ for(unsigned int phel=0;phel<2;++phel) {
+ for(unsigned int ghel=0;ghel<2;++ghel) {
+ // first diagram
+ SpinorWaveFunction inters1 =
+ FFPvertex_->evaluate(ZERO,5,qin[ihel1].particle(),qin[ihel1],pout[phel]);
+ SpinorBarWaveFunction inters2 =
+ FFPvertex_->evaluate(ZERO,5,qin[ihel1].particle()->CC(),
+ qbarin[ihel2],wout[whel]);
+ diag[0] = FFGvertex_->evaluate(mu2,inters1,inters2,gout[ghel]);
+ // second diagram
+ SpinorWaveFunction inters3 =
+ FFGvertex_->evaluate(mu2,5,qin[ihel1].particle(),qin[ihel1],gout[ghel]);
+ SpinorBarWaveFunction inters4 =
+ FFPvertex_->evaluate(ZERO,5,qbarin[ihel2].particle(),
+ qbarin[ihel2],pout[phel]);
+ diag[1] = FFPvertex_->evaluate(ZERO,inters3,inters4,wout[whel]);
+ // fourth diagram
+ diag[2] = FFPvertex_->evaluate(ZERO,inters3,inters2,pout[phel]);
+ // fifth diagram
+ SpinorBarWaveFunction inters5 =
+ FFGvertex_->evaluate(mu2,5,qbarin[ihel2].particle(),
+ qbarin[ihel2],gout[ghel]);
+ diag[3] =
+ FFPvertex_->evaluate(ZERO,inters1,inters5,wout[whel]);
+ // sixth diagram
+ SpinorWaveFunction inters6 =
+ FFPvertex_->evaluate(ZERO,5,qbarin[ihel2].particle()->CC(),
+ qin[ihel1],wout[whel]);
+ diag[4] = FFGvertex_->evaluate(mu2,inters6,inters4,gout[ghel]);
+ // eighth diagram
+ diag[5] = FFPvertex_->evaluate(ZERO,inters6,inters5,pout[phel]);
+ // sum
+ Complex dsum = std::accumulate(diag.begin(),diag.end(),Complex(0.));
+ sum += norm(dsum);
+ }
+ }
+ }
+ }
+ }
+ // divide out the em and strong couplings
+ sum /= norm(FFGvertex_->norm()*FFPvertex_->norm());
+ // final spin and colour factors spin = 1/4 colour = 4/9
+ if(particles[4]->id()==ParticleID::g) sum /= 9.;
+ // final spin and colour factors spin = 1/4 colour = 4/(3*8)
+ else sum /= 24.;
+ // finally identical particle factor
+ return 0.5*sum;
+}
+
+double MEPP2GammaGammaPowheg::subtractedVirtual() const {
+ double v = 1+tHat()/sHat();
+ double born = (1-v)/v+v/(1-v);
+ double finite_term = born*
+ (2./3.*sqr(Constants::pi)-3.+sqr(log(v))+sqr(log(1-v))+3.*log(1-v))+
+ 2.+2.*log(v)+2.*log(1-v)+3.*(1-v)/v*(log(v)-log(1-v))+
+ (2.+v/(1-v))*sqr(log(v))+(2.+(1-v)/v)*sqr(log(1-v));
+
+ double virt = ((6.-(2./3.)*sqr(Constants::pi))*
+ born-2.+finite_term);
+
+ return virt/born;
+}
+
+double MEPP2GammaGammaPowheg::subtractedReal(pair<double,double> x, double z,
+ double zJac, double oldqPDF, double newqPDF,
+ double newgPDF,bool order) const {
+ double vt = vTilde_*(1.-z);
+ double vJac = 1.-z;
+ Energy pT = sqrt(sHat()*vt*(1.-vt-z)/z);
+ // rapidities
+ double rapidity;
+ if(order) {
+ rapidity = -log(x.second*sqrt(lastS())/pT*vt);
+ }
+ else {
+ rapidity = log(x.first *sqrt(lastS())/pT*vt);
+ }
+ // CMS system
+ Energy rs=sqrt(lastS());
+ Lorentz5Momentum pcmf = Lorentz5Momentum(ZERO,ZERO,0.5*rs*(x.first-x.second),
+ 0.5*rs*(x.first+x.second));
+ pcmf.rescaleMass();
+ Boost blab(pcmf.boostVector());
+ // emission from the quark radiation
+ vector<Lorentz5Momentum> pnew(5);
+ if(order) {
+ pnew [0] = Lorentz5Momentum(ZERO,ZERO,0.5*rs*x.first/z,
+ 0.5*rs*x.first/z,ZERO);
+ pnew [1] = Lorentz5Momentum(ZERO,ZERO,-0.5*rs*x.second,
+ 0.5*rs*x.second,ZERO) ;
+ }
+ else {
+ pnew[0] = Lorentz5Momentum(ZERO,ZERO,0.5*rs*x.first,
+ 0.5*rs*x.first,ZERO);
+ pnew[1] = Lorentz5Momentum(ZERO,ZERO,-0.5*rs*x.second/z,
+ 0.5*rs*x.second/z,ZERO) ;
+ }
+ pnew [2] = meMomenta()[2];
+ pnew [3] = meMomenta()[3];
+ pnew [4] = Lorentz5Momentum(pT*cos(phi_),pT*sin(phi_),
+ pT*sinh(rapidity),
+ pT*cosh(rapidity), ZERO);
+ Lorentz5Momentum K = pnew [0]+pnew [1]-pnew [4];
+ Lorentz5Momentum Kt = pcmf;
+ Lorentz5Momentum Ksum = K+Kt;
+ Energy2 K2 = K.m2();
+ Energy2 Ksum2 = Ksum.m2();
+ for(unsigned int ix=2;ix<4;++ix) {
+ pnew [ix].boost(blab);
+ pnew [ix] = pnew [ix] - 2.*Ksum*(Ksum*pnew [ix])/Ksum2
+ +2*K*(Kt*pnew [ix])/K2;
+ }
+ // phase-space prefactors
+ double phase = zJac*vJac/z;
+ // real emission q qbar
+ vector<double> output(4,0.);
+ double realQQ(0.),realGQ(0.);
+ if(!(zTilde_<1e-7 || vt<1e-7 || 1.-z-vt < 1e-7 )) {
+ cPDVector particles(mePartonData());
+ particles.push_back(gluon_);
+ // calculate the full 2->3 matrix element
+ realQQ = sHat()*phase*newqPDF/oldqPDF*
+ realGammaGammagME(particles,pnew,order ? IIQCD1 : IIQCD2,Subtraction,false);
+ if(order) {
+ particles[0] = gluon_;
+ particles[4] = mePartonData()[0]->CC();
+ realGQ = sHat()*phase*newgPDF/oldqPDF*
+ realGammaGammaqbarME(particles,pnew,IIQCD2,Subtraction,false);
+ }
+ else {
+ particles[1] = gluon_;
+ particles[4] = mePartonData()[1]->CC();
+ realGQ = sHat()*phase*newgPDF/oldqPDF*
+ realGammaGammaqME (particles,pnew,IIQCD1,Subtraction,false);
+ }
+ }
+ // return the answer
+ return realQQ+realGQ;
+}
+
+double MEPP2GammaGammaPowheg::collinearQuark(double x, Energy2 mu2, double jac, double z,
+ double oldPDF, double newPDF) const {
+ if(1.-z < 1.e-8) return 0.;
+ return CFfact_*(
+ // this bit is multiplied by LO PDF
+ sqr(Constants::pi)/3.-5.+2.*sqr(log(1.-x ))
+ +(1.5+2.*log(1.-x ))*log(sHat()/mu2)
+ // NLO PDF bit
+ +jac /z * newPDF /oldPDF *
+ (1.-z -(1.+z )*log(sqr(1.-z )/z )
+ -(1.+z )*log(sHat()/mu2)-2.*log(z )/(1.-z ))
+ // + function bit
+ +jac /z *(newPDF /oldPDF -z )*
+ 2./(1.-z )*log(sHat()*sqr(1.-z )/mu2));
+}
+
+double MEPP2GammaGammaPowheg::collinearGluon(Energy2 mu2, double jac, double z,
+ double oldPDF, double newPDF) const {
+ if(1.-z < 1.e-8) return 0.;
+ return TRfact_*jac/z*newPDF/oldPDF*
+ ((sqr(z)+sqr(1.-z))*log(sqr(1.-z)*sHat()/z/mu2)
+ +2.*z*(1.-z));
+}
+
+void MEPP2GammaGammaPowheg::doinit() {
+ HwMEBase::doinit();
+ vector<unsigned int> mopt(2,1);
+ massOption(mopt);
+ // get the vertices we need
+ // get a pointer to the standard model object in the run
+ static const tcHwSMPtr hwsm
+ = dynamic_ptr_cast<tcHwSMPtr>(standardModel());
+ if (!hwsm) throw InitException() << "hwsm pointer is null in"
+ << " MEPP2GammaGamma::doinit()"
+ << Exception::abortnow;
+ // get pointers to all required Vertex objects
+ FFPvertex_ = hwsm->vertexFFP();
+ FFGvertex_ = hwsm->vertexFFG();
+ gluon_ = getParticleData(ParticleID::g);
+ // sampling factors
+ prefactor_.push_back(preQCDqqbarq_);
+ prefactor_.push_back(preQCDqqbarqbar_);
+ prefactor_.push_back(preQCDqg_);
+ prefactor_.push_back(preQCDgqbar_);
+ prefactor_.push_back(preQEDqqbarq_);
+ prefactor_.push_back(preQEDqqbarqbar_);
+ prefactor_.push_back(preQEDqgq_);
+ prefactor_.push_back(preQEDgqbarqbar_);
+}
+
+HardTreePtr MEPP2GammaGammaPowheg::
+generateHardest(ShowerTreePtr tree,
+ vector<ShowerInteraction::Type> interactions) {
+ beams_.clear();
+ partons_.clear();
+ bool QCDAllowed(false),QEDAllowed(false);
+ for(unsigned int ix=0;ix<interactions.size();++ix) {
+ if(interactions[ix]==ShowerInteraction::QED)
+ QEDAllowed = true;
+ else if(interactions[ix]==ShowerInteraction::QCD)
+ QCDAllowed = true;
+ else if(interactions[ix]==ShowerInteraction::Both) {
+ QEDAllowed = true;
+ QCDAllowed = true;
+ }
+ }
+ // find the incoming particles
+ ShowerParticleVector incoming;
+ // get the particles to be showered
+ map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator cit;
+ vector<ShowerProgenitorPtr> particlesToShower;
+ //progenitor particles are produced in z direction.
+ for( cit = tree->incomingLines().begin();
+ cit != tree->incomingLines().end(); ++cit ) {
+ incoming.push_back( cit->first->progenitor() );
+ beams_.push_back( cit->first->beam() );
+ partons_.push_back( cit->first->progenitor()->dataPtr() );
+ particlesToShower.push_back( cit->first );
+ }
+ // find the parton which should be first
+ if( ( particlesToShower[1]->progenitor()->id() > 0 &&
+ particlesToShower[0]->progenitor()->id() < 0 ) ||
+ ( particlesToShower[0]->progenitor()->id() == ParticleID::g &&
+ particlesToShower[1]->progenitor()->id() < 6 &&
+ particlesToShower[1]->progenitor()->id() > 0 ) )
+ swap(particlesToShower[0],particlesToShower[1]);
+ // check that quark is along +ve z direction
+ quarkplus_ = particlesToShower[0]->progenitor()->momentum().z() > ZERO;
+ if( partons_[0]->id() < 0 ||
+ (partons_[0]->id()==ParticleID::g && partons_[1]->id()>0)) {
+ swap(partons_[0],partons_[1]);
+ swap(beams_ [0],beams_ [1]);
+ }
+ // outgoing partons
+ for( map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
+ cjt= tree->outgoingLines().begin();
+ cjt != tree->outgoingLines().end();++cjt ) {
+ particlesToShower.push_back( cjt->first );
+ }
+ if(particlesToShower.size()!=4) return HardTreePtr();
+ if(particlesToShower[2]->id()!=ParticleID::gamma)
+ swap(particlesToShower[2],particlesToShower[3]);
+ if(particlesToShower[3]->progenitor()->id()==ParticleID::gamma) {
+ if(QCDAllowed) return hardQCDEmission(particlesToShower);
+ }
+ else {
+ if(QEDAllowed) return hardQEDEmission(particlesToShower);
+ }
+ return HardTreePtr();
+}
+
+HardTreePtr MEPP2GammaGammaPowheg::
+hardQCDEmission(vector<ShowerProgenitorPtr> particlesToShower) {
+ Energy rootS = sqrt(lastS());
+ // limits on the rapidity of the jet
+ double minyj = -8.0,maxyj = 8.0;
+ // generate the hard emission
+ pair<double,double> x = make_pair(particlesToShower[0]->progenitor()->x(),
+ particlesToShower[1]->progenitor()->x());
+ vector<Energy> pT;
+ Energy pTmax(-GeV);
+ cPDVector selectedParticles;
+ vector<Lorentz5Momentum> selectedMomenta;
+ int iemit(-1);
+ for(unsigned int ix=0;ix<4;++ix) {
+ pT.push_back(0.5*generator()->maximumCMEnergy());
+ double a = alphaQCD_->overestimateValue()/Constants::twopi*
+ prefactor_[ix]*(maxyj-minyj);
+ cPDVector particles;
+ for(unsigned int iy=0;iy<particlesToShower.size();++iy)
+ particles.push_back(particlesToShower[iy]->progenitor()->dataPtr());
+ if(ix<2) particles.push_back(gluon_);
+ else if(ix==2) {
+ particles.push_back(particles[0]->CC());
+ particles[0] = gluon_;
+ }
+ else {
+ particles.push_back(particles[1]->CC());
+ particles[1] = gluon_;
+ }
+ vector<Lorentz5Momentum> momenta(5);
+ do {
+ pT[ix] *= pow(UseRandom::rnd(),1./a);
+ double y = UseRandom::rnd()*(maxyj-minyj)+ minyj;
+ double vt,z;
+ if(ix%2==0) {
+ vt = pT[ix]*exp(-y)/rootS/x.second;
+ z = (1.-pT[ix]*exp(-y)/rootS/x.second)/(1.+pT[ix]*exp( y)/rootS/x.first );
+ if(z>1.||z<x.first) continue;
+ }
+ else {
+ vt = pT[ix]*exp( y)/rootS/x.first ;
+ z = (1.-pT[ix]*exp( y)/rootS/x.first )/(1.+pT[ix]*exp(-y)/rootS/x.second );
+ if(z>1.||z<x.second) continue;
+ }
+ if(vt>1.-z || vt<0.) continue;
+ if(ix%2==0) {
+ momenta[0] = particlesToShower[0]->progenitor()->momentum()/z;
+ momenta[1] = particlesToShower[1]->progenitor()->momentum();
+ }
+ else {
+ momenta[0] = particlesToShower[0]->progenitor()->momentum();
+ momenta[1] = particlesToShower[1]->progenitor()->momentum()/z;
+ }
+ double phi = Constants::twopi*UseRandom::rnd();
+ momenta[2] = particlesToShower[2]->progenitor()->momentum();
+ momenta[3] = particlesToShower[3]->progenitor()->momentum();
+ if(!quarkplus_) y *= -1.;
+ momenta[4] = Lorentz5Momentum(pT[ix]*cos(phi),pT[ix]*sin(phi),
+ pT[ix]*sinh(y),pT[ix]*cosh(y), ZERO);
+ Lorentz5Momentum K = momenta[0] + momenta[1] - momenta[4];
+ Lorentz5Momentum Kt = momenta[2]+momenta[3];
+ Lorentz5Momentum Ksum = K+Kt;
+ Energy2 K2 = K.m2(), Ksum2 = Ksum.m2();
+ for(unsigned int iy=2;iy<4;++iy) {
+ momenta [iy] = momenta [iy] - 2.*Ksum*(Ksum*momenta [iy])/Ksum2
+ +2*K*(Kt*momenta [iy])/K2;
+ }
+ // matrix element piece
+ double wgt = alphaQCD_->ratio(sqr(pT[ix]))*z/(1.-vt)/prefactor_[ix]/loME_;
+ if(ix==0)
+ wgt *= sqr(pT[ix])*realGammaGammagME(particles,momenta,IIQCD1,Shower,false);
+ else if(ix==1)
+ wgt *= sqr(pT[ix])*realGammaGammagME(particles,momenta,IIQCD2,Shower,false);
+ else if(ix==2)
+ wgt *= sqr(pT[ix])*realGammaGammaqbarME(particles,momenta,IIQCD1,Shower,false);
+ else if(ix==3)
+ wgt *= sqr(pT[ix])*realGammaGammaqME(particles,momenta,IIQCD2,Shower,false);
+ wgt *= 4.*Constants::pi/alphaS_;
+ // pdf piece
+ double pdf[2];
+ if(ix%2==0) {
+ pdf[0] = beams_[0]->pdf()->xfx(beams_[0],partons_ [0],
+ scale(), x.first ) /x.first;
+ pdf[1] = beams_[0]->pdf()->xfx(beams_[0],particles[0],
+ scale()+sqr(pT[ix]),x.first /z)*z/x.first;
+ }
+ else {
+ pdf[0] = beams_[1]->pdf()->xfx(beams_[1],partons_ [1],
+ scale() ,x.second ) /x.second;
+ pdf[1] = beams_[1]->pdf()->xfx(beams_[1],particles[1],
+ scale()+sqr(pT[ix]),x.second/z)*z/x.second;
+ }
+ if(pdf[0]<=0.||pdf[1]<=0.) continue;
+ wgt *= pdf[1]/pdf[0];
+ if(wgt>1.) generator()->log() << "Weight greater than one in "
+ << "MEPP2GammaGammaPowheg::hardQCDEmission() "
+ << "for channel " << ix
+ << " Weight = " << wgt << "\n";
+ if(UseRandom::rnd()<wgt) break;
+ }
+ while(pT[ix]>minpT_);
+ if(pT[ix]>minpT_ && pT[ix]>pTmax) {
+ pTmax = pT[ix];
+ selectedParticles = particles;
+ selectedMomenta = momenta;
+ iemit=ix;
+ }
+ }
+ // if no emission
+ if(pTmax<ZERO) {
+ for(unsigned int ix=0;ix<particlesToShower.size();++ix)
+ particlesToShower[ix]->maximumpT(minpT_,ShowerInteraction::QCD);
+ return HardTreePtr();
+ }
+ // construct the HardTree object needed to perform the showers
+ // create the partons
+ ShowerParticleVector newparticles;
+ newparticles.push_back(new_ptr(ShowerParticle(selectedParticles[0],false)));
+ newparticles.push_back(new_ptr(ShowerParticle(selectedParticles[1],false)));
+ newparticles.push_back(new_ptr(ShowerParticle(selectedParticles[4], true)));
+ // set the momenta
+ for(unsigned int ix=0;ix<2;++ix)
+ newparticles[ix]->set5Momentum(selectedMomenta[ix]);
+ newparticles[2]->set5Momentum(selectedMomenta[4]);
+ // create the off-shell particle
+ Lorentz5Momentum poff = selectedMomenta[iemit%2] - selectedMomenta[4];
+ poff.rescaleMass();
+ newparticles.push_back(new_ptr(ShowerParticle(partons_[iemit%2],false)));
+ newparticles.back()->set5Momentum(poff);
+ for(unsigned int ix=2;ix<particlesToShower.size();++ix) {
+ newparticles.push_back(new_ptr(ShowerParticle(particlesToShower[ix]->
+ progenitor()->dataPtr(),true)));
+ newparticles.back()->set5Momentum(selectedMomenta[ix]);
+ }
+ vector<HardBranchingPtr> inBranch,hardBranch;
+ // create the branchings for the incoming particles
+ inBranch.push_back(new_ptr(HardBranching(newparticles[0],SudakovPtr(),
+ HardBranchingPtr(),HardBranching::Incoming)));
+ inBranch.push_back(new_ptr(HardBranching(newparticles[1],SudakovPtr(),
+ HardBranchingPtr(),HardBranching::Incoming)));
+ // intermediate IS particle
+ hardBranch.push_back(new_ptr(HardBranching(newparticles[3],SudakovPtr(),
+ inBranch[iemit%2],HardBranching::Incoming)));
+ inBranch[iemit%2]->addChild(hardBranch.back());
+ if(newparticles[3]->id()>0)
+ inBranch[iemit%2]->type(ShowerPartnerType::QCDColourLine );
+ else
+ inBranch[iemit%2]->type(ShowerPartnerType::QCDAntiColourLine);
+ // create the branching for the emitted jet
+ inBranch[iemit%2]->addChild(new_ptr(HardBranching(newparticles[2],SudakovPtr(),
+ inBranch[iemit%2],
+ HardBranching::Outgoing)));
+ // set the colour partners
+ hardBranch.back()->colourPartner(inBranch[iemit%2==0 ? 1 : 0]);
+ inBranch[iemit%2==0 ? 1 : 0]->colourPartner(hardBranch.back());
+ // add other particle
+ hardBranch.push_back(inBranch[iemit%2==0 ? 1 : 0]);
+ // outgoing particles
+ for(unsigned int ix=4;ix<newparticles.size();++ix) {
+ hardBranch.push_back(new_ptr(HardBranching(newparticles[ix],SudakovPtr(),
+ HardBranchingPtr(),
+ HardBranching::Outgoing)));
+ }
+ // make the tree
+ HardTreePtr hardtree=new_ptr(HardTree(hardBranch,inBranch,ShowerInteraction::QCD));
+ // connect the ShowerParticles with the branchings
+ // and set the maximum pt for the radiation
+ set<HardBranchingPtr> hard=hardtree->branchings();
+ for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
+ particlesToShower[ix]->maximumpT(pTmax,ShowerInteraction::QCD);
+ for(set<HardBranchingPtr>::const_iterator mit=hard.begin();
+ mit!=hard.end();++mit) {
+ if(particlesToShower[ix]->progenitor()->id()==(*mit)->branchingParticle()->id()&&
+ (( particlesToShower[ix]->progenitor()->isFinalState()&&
+ (**mit).status()==HardBranching::Outgoing)||
+ (!particlesToShower[ix]->progenitor()->isFinalState()&&
+ (**mit).status()==HardBranching::Incoming))) {
+ hardtree->connect(particlesToShower[ix]->progenitor(),*mit);
+ if((**mit).status()==HardBranching::Incoming) {
+ (*mit)->beam(particlesToShower[ix]->original()->parents()[0]);
+ }
+ HardBranchingPtr parent=(*mit)->parent();
+ while(parent) {
+ parent->beam(particlesToShower[ix]->original()->parents()[0]);
+ parent=parent->parent();
+ };
+ }
+ }
+ }
+ ColinePtr newline=new_ptr(ColourLine());
+ for(set<HardBranchingPtr>::const_iterator cit=hardtree->branchings().begin();
+ cit!=hardtree->branchings().end();++cit) {
+ if((**cit).branchingParticle()->dataPtr()->iColour()==PDT::Colour3)
+ newline->addColoured((**cit).branchingParticle());
+ else if((**cit).branchingParticle()->dataPtr()->iColour()==PDT::Colour3bar)
+ newline->addAntiColoured((**cit).branchingParticle());
+ }
+ // return the tree
+ return hardtree;
+}
+
+HardTreePtr MEPP2GammaGammaPowheg::
+hardQEDEmission(vector<ShowerProgenitorPtr> particlesToShower) {
+ // return if not emission from quark
+ if(particlesToShower[0]->progenitor()->id()!=ParticleID::g &&
+ particlesToShower[1]->progenitor()->id()!=ParticleID::g )
+ return HardTreePtr();
+ // generate the hard emission
+ pair<double,double> x = make_pair(particlesToShower[0]->progenitor()->x(),
+ particlesToShower[1]->progenitor()->x());
+ vector<Energy> pT;
+ Energy pTmax(-GeV);
+ cPDVector selectedParticles;
+ vector<Lorentz5Momentum> selectedMomenta;
+ int iemit(-1);
+ pair<double,double> mewgt(make_pair(0.,0.));
+ for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
+ selectedParticles.push_back(particlesToShower[ix]->progenitor()->dataPtr());
+ selectedMomenta.push_back(particlesToShower[ix]->progenitor()->momentum());
+ }
+ selectedParticles.push_back(getParticleData(ParticleID::gamma));
+ swap(selectedParticles[3],selectedParticles[4]);
+ selectedMomenta.push_back(Lorentz5Momentum());
+ swap(selectedMomenta[3],selectedMomenta[4]);
+ Lorentz5Momentum pin,pout;
+ double xB;
+ unsigned int iloc;
+ if(particlesToShower[0]->progenitor()->dataPtr()->charged()) {
+ pin = particlesToShower[0]->progenitor()->momentum();
+ xB = x.first;
+ iloc = 6;
+ }
+ else {
+ pin = particlesToShower[1]->progenitor()->momentum();
+ xB = x.second;
+ iloc = 7;
+ }
+ pout = particlesToShower[3]->progenitor()->momentum();
+ Lorentz5Momentum q = pout-pin;
+ Axis axis(q.vect().unit());
+ LorentzRotation rot;
+ double sinth(sqrt(sqr(axis.x())+sqr(axis.y())));
+ rot = LorentzRotation();
+ if(axis.perp2()>1e-20) {
+ rot.setRotate(-acos(axis.z()),Axis(-axis.y()/sinth,axis.x()/sinth,0.));
+ rot.rotateX(Constants::pi);
+ }
+ if(abs(1.-q.e()/q.vect().mag())>1e-6)
+ rot.boostZ(q.e()/q.vect().mag());
+ Lorentz5Momentum ptemp = rot*pin;
+ if(ptemp.perp2()/GeV2>1e-20) {
+ Boost trans = -1./ptemp.e()*ptemp.vect();
+ trans.setZ(0.);
+ rot.boost(trans);
+ }
+ rot.invert();
+ Energy Q = sqrt(-q.m2());
+ double xT = sqrt((1.-xB)/xB);
+ double xTMin = 2.*minpT_/Q;
+ double wgt(0.);
+ double a = alphaQED_->overestimateValue()*prefactor_[iloc]/Constants::twopi;
+ Lorentz5Momentum p1,p2,p3;
+ do {
+ wgt = 0.;
+ // intergration variables dxT/xT^3
+ xT *= 1./sqrt(1.-2.*log(UseRandom::rnd())/a*sqr(xT));
+ // dz
+ double zp = UseRandom::rnd();
+ double xp = 1./(1.+0.25*sqr(xT)/zp/(1.-zp));
+ if(xT<xTMin) break;
+ // check allowed
+ if(xp<xB||xp>1.) continue;
+ // phase-space piece of the weight
+ wgt = 4.*sqr(1.-xp)*(1.-zp)*zp/prefactor_[iloc]/loME_;
+ // coupling
+ Energy2 pT2 = 0.25*sqr(Q*xT);
+ wgt *= alphaQED_->ratio(pT2);
+ // matrix element
+ wgt *= 4.*Constants::pi/alphaEM_;
+ // PDF
+ double pdf[2];
+ if(iloc==6) {
+ pdf[0] = beams_[0]->pdf()->
+ xfx(beams_[0],partons_[0],scale() ,x.first );
+ pdf[1] = beams_[0]->pdf()->
+ xfx(beams_[0],partons_[0],scale()+pT2,x.first /xp);
+ }
+ else {
+ pdf[0] = beams_[1]->pdf()->
+ xfx(beams_[1],partons_[1],scale() ,x.second );
+ pdf[1] = beams_[1]->pdf()->
+ xfx(beams_[1],partons_[1],scale()+pT2,x.second/xp);
+ }
+ if(pdf[0]<=0.||pdf[1]<=0.) {
+ wgt = 0.;
+ continue;
+ }
+ wgt *= pdf[1]/pdf[0];
+ // matrix element piece
+ double phi = Constants::twopi*UseRandom::rnd();
+ double x2 = 1.-(1.-zp)/xp;
+ double x3 = 2.-1./xp-x2;
+ p1=Lorentz5Momentum(ZERO,ZERO,0.5*Q/xp,0.5*Q/xp,ZERO);
+ p2=Lorentz5Momentum( 0.5*Q*xT*cos(phi), 0.5*Q*xT*sin(phi),
+ -0.5*Q*x2,0.5*Q*sqrt(sqr(xT)+sqr(x2)));
+ p3=Lorentz5Momentum(-0.5*Q*xT*cos(phi),-0.5*Q*xT*sin(phi),
+ -0.5*Q*x3,0.5*Q*sqrt(sqr(xT)+sqr(x3)));
+ selectedMomenta[iloc-6] = rot*p1;
+ selectedMomenta[3] = rot*p3;
+ selectedMomenta[4] = rot*p2;
+ if(iloc==6) {
+ mewgt.first =
+ sqr(Q)*realGammaGammaqME(selectedParticles,selectedMomenta,IFQED1,Shower,false);
+ mewgt.second =
+ sqr(Q)*realGammaGammaqME(selectedParticles,selectedMomenta,FIQED1,Shower,false);
+ wgt *= mewgt.first+mewgt.second;
+ }
+ else {
+ mewgt.first =
+ sqr(Q)*realGammaGammaqbarME(selectedParticles,selectedMomenta,IFQED2,Shower,false);
+ mewgt.second =
+ sqr(Q)*realGammaGammaqbarME(selectedParticles,selectedMomenta,FIQED2,Shower,false);
+ wgt *= mewgt.first+mewgt.second;
+ }
+ if(wgt>1.) generator()->log() << "Weight greater than one in "
+ << "MEPP2GammaGammaPowheg::hardQEDEmission() "
+ << "for IF channel "
+ << " Weight = " << wgt << "\n";
+ }
+ while(xT>xTMin&&UseRandom::rnd()>wgt);
+ // if no emission
+ if(xT<xTMin) {
+ for(unsigned int ix=0;ix<particlesToShower.size();++ix)
+ particlesToShower[ix]->maximumpT(minpT_,ShowerInteraction::QED);
+ return HardTreePtr();
+ }
+ pTmax = 0.5*xT*Q;
+ iemit = mewgt.first>mewgt.second ? 2 : 3;
+ // construct the HardTree object needed to perform the showers
+ // create the partons
+ ShowerParticleVector newparticles;
+ newparticles.push_back(new_ptr(ShowerParticle(selectedParticles[0],false)));
+ newparticles.push_back(new_ptr(ShowerParticle(selectedParticles[1],false)));
+ newparticles.push_back(new_ptr(ShowerParticle(selectedParticles[3], true)));
+ // set the momenta
+ for(unsigned int ix=0;ix<2;++ix)
+ newparticles[ix]->set5Momentum(selectedMomenta[ix]);
+ newparticles[2]->set5Momentum(selectedMomenta[3]);
+ // create the off-shell particle
+ if(iemit==2) {
+ if(particlesToShower[0]->progenitor()->dataPtr()->charged()) {
+ Lorentz5Momentum poff = selectedMomenta[0] - selectedMomenta[3];
+ poff.rescaleMass();
+ newparticles.push_back(new_ptr(ShowerParticle(partons_[0],false)));
+ newparticles.back()->set5Momentum(poff);
+ }
+ else {
+ Lorentz5Momentum poff = selectedMomenta[1] - selectedMomenta[3];
+ poff.rescaleMass();
+ newparticles.push_back(new_ptr(ShowerParticle(partons_[1],false)));
+ newparticles.back()->set5Momentum(poff);
+ }
+ }
+ else if(iemit==3) {
+ Lorentz5Momentum poff = selectedMomenta[3]+selectedMomenta[4];
+ poff.rescaleMass();
+ newparticles.push_back(new_ptr(ShowerParticle(particlesToShower[3]
+ ->progenitor()->dataPtr(),true)));
+ newparticles.back()->set5Momentum(poff);
+ }
+ else
+ assert(false);
+ for(unsigned int ix=2;ix<particlesToShower.size();++ix) {
+ newparticles.push_back(new_ptr(ShowerParticle(particlesToShower[ix]->
+ progenitor()->dataPtr(),true)));
+ newparticles.back()->set5Momentum(selectedMomenta[ix==2 ? 2 : 4 ]);
+ }
+ vector<HardBranchingPtr> inBranch,hardBranch;
+ // create the branchings for the incoming particles
+ inBranch.push_back(new_ptr(HardBranching(newparticles[0],SudakovPtr(),
+ HardBranchingPtr(),HardBranching::Incoming)));
+ inBranch.push_back(new_ptr(HardBranching(newparticles[1],SudakovPtr(),
+ HardBranchingPtr(),HardBranching::Incoming)));
+ if(iemit<3) {
+ int icharged = iemit;
+ if(icharged==2) icharged = particlesToShower[0]->progenitor()->
+ dataPtr()->charged() ? 0 : 1;
+ // intermediate IS particle
+ hardBranch.push_back(new_ptr(HardBranching(newparticles[3],SudakovPtr(),
+ inBranch[icharged],HardBranching::Incoming)));
+ inBranch[icharged]->addChild(hardBranch.back());
+ inBranch[icharged]->type(ShowerPartnerType::QED);
+ // create the branching for the emitted jet
+ inBranch[icharged]->addChild(new_ptr(HardBranching(newparticles[2],SudakovPtr(),
+ inBranch[icharged],
+ HardBranching::Outgoing)));
+ // set the colour partners
+ if(iemit<2) {
+ hardBranch.back()->colourPartner(inBranch[icharged==0 ? 1 : 0]);
+ inBranch[icharged==0 ? 1 : 0]->colourPartner(hardBranch.back());
+ }
+ // add other particle
+ hardBranch.push_back(inBranch[icharged == 0 ? 1 : 0]);
+ // outgoing particles
+ for(unsigned int ix=4;ix<newparticles.size();++ix) {
+ hardBranch.push_back(new_ptr(HardBranching(newparticles[ix],SudakovPtr(),
+ HardBranchingPtr(),
+ HardBranching::Outgoing)));
+ }
+ if(iemit==2) {
+ hardBranch.back()->colourPartner(hardBranch[0]);
+ hardBranch[0]->colourPartner(hardBranch.back());
+ }
+ }
+ else {
+ for(unsigned int ix=0;ix<2;++ix)
+ hardBranch.push_back(inBranch[ix]);
+ hardBranch.push_back(new_ptr(HardBranching(newparticles[4],SudakovPtr(),
+ HardBranchingPtr(),
+ HardBranching::Outgoing)));
+ hardBranch.push_back(new_ptr(HardBranching(newparticles[3],SudakovPtr(),
+ HardBranchingPtr(),
+ HardBranching::Outgoing)));
+ hardBranch.back()->type(ShowerPartnerType::QED);
+ hardBranch.back()->addChild(new_ptr(HardBranching(newparticles[5],SudakovPtr(),
+ HardBranchingPtr(),
+ HardBranching::Outgoing)));
+ hardBranch.back()->addChild(new_ptr(HardBranching(newparticles[2],SudakovPtr(),
+ HardBranchingPtr(),
+ HardBranching::Outgoing)));
+ if(hardBranch[0]->branchingParticle()->dataPtr()->charged()) {
+ hardBranch.back()->colourPartner(hardBranch[0]);
+ hardBranch[0]->colourPartner(hardBranch.back());
+ }
+ else {
+ hardBranch.back()->colourPartner(hardBranch[1]);
+ hardBranch[1]->colourPartner(hardBranch.back());
+ }
+ }
+ // make the tree
+ HardTreePtr hardtree=new_ptr(HardTree(hardBranch,inBranch,ShowerInteraction::QED));
+ // connect the ShowerParticles with the branchings
+ // and set the maximum pt for the radiation
+ set<HardBranchingPtr> hard=hardtree->branchings();
+ for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
+ particlesToShower[ix]->maximumpT(pTmax,ShowerInteraction::QED);
+ for(set<HardBranchingPtr>::const_iterator mit=hard.begin();
+ mit!=hard.end();++mit) {
+ if(particlesToShower[ix]->progenitor()->id()==(*mit)->branchingParticle()->id()&&
+ (( particlesToShower[ix]->progenitor()->isFinalState()&&
+ (**mit).status()==HardBranching::Outgoing)||
+ (!particlesToShower[ix]->progenitor()->isFinalState()&&
+ (**mit).status()==HardBranching::Incoming))) {
+ hardtree->connect(particlesToShower[ix]->progenitor(),*mit);
+ if((**mit).status()==HardBranching::Incoming) {
+ (*mit)->beam(particlesToShower[ix]->original()->parents()[0]);
+ }
+ HardBranchingPtr parent=(*mit)->parent();
+ while(parent) {
+ parent->beam(particlesToShower[ix]->original()->parents()[0]);
+ parent=parent->parent();
+ };
+ }
+ }
+ }
+ ColinePtr newline1 = new_ptr(ColourLine());
+ ColinePtr newline2 = new_ptr(ColourLine());
+ HardBranchingPtr gluon,quark,antiQuark;
+ for(set<HardBranchingPtr>::const_iterator cit=hardtree->branchings().begin();
+ cit!=hardtree->branchings().end();++cit) {
+ if((**cit).branchingParticle()->dataPtr()->iColour()==PDT::Colour8) {
+ gluon = *cit;
+ if((**cit).status()==HardBranching::Incoming) {
+ newline1->addColoured ((**cit).branchingParticle());
+ newline2->addAntiColoured((**cit).branchingParticle());
+ }
+ else {
+ newline2->addColoured ((**cit).branchingParticle());
+ newline1->addAntiColoured((**cit).branchingParticle());
+ }
+ }
+ else if((**cit).branchingParticle()->dataPtr()->iColour()==PDT::Colour3) {
+ if((**cit).status()==HardBranching::Incoming) {
+ antiQuark = *cit;
+ newline2->addColoured((**cit).branchingParticle());
+ }
+ else {
+ quark = *cit;
+ newline1->addColoured((**cit).branchingParticle());
+ }
+ }
+ else if((**cit).branchingParticle()->dataPtr()->iColour()==PDT::Colour3bar) {
+ if((**cit).status()==HardBranching::Incoming) {
+ quark = *cit;
+ newline1->addAntiColoured((**cit).branchingParticle());
+ }
+ else {
+ antiQuark = *cit;
+ newline2->addAntiColoured((**cit).branchingParticle());
+ }
+ }
+ }
+ assert(quark&&antiQuark&&gluon);
+ gluon->colourPartner(UseRandom::rndbool() ? quark : antiQuark);
+ // return the tree
+ return hardtree;
+}
diff --git a/MatrixElement/Powheg/MEPP2GammaGammaPowheg.h b/MatrixElement/Powheg/MEPP2GammaGammaPowheg.h
new file mode 100644
--- /dev/null
+++ b/MatrixElement/Powheg/MEPP2GammaGammaPowheg.h
@@ -0,0 +1,538 @@
+// -*- C++ -*-
+#ifndef HERWIG_MEPP2GammaGammaPowheg_H
+#define HERWIG_MEPP2GammaGammaPowheg_H
+//
+// This is the declaration of the MEPP2GammaGammaPowheg class.
+//
+
+#include "Herwig/MatrixElement/HwMEBase.h"
+#include "ThePEG/Helicity/Vertex/Vector/FFVVertex.h"
+#include "Herwig/MatrixElement/ProductionMatrixElement.h"
+#include "Herwig/Shower/Couplings/ShowerAlpha.h"
+
+namespace Herwig {
+
+using namespace ThePEG;
+
+/**
+ * Here is the documentation of the MEPP2GammaGammaPowheg class.
+ *
+ * @see \ref MEPP2GammaGammaPowhegInterfaces "The interfaces"
+ * defined for MEPP2GammaGammaPowheg.
+ */
+class MEPP2GammaGammaPowheg: public HwMEBase {
+
+ enum DipoleType { IIQCD1=2, IIQCD2=4,
+ IFQED1=5, FIQED1=6, IFQED2=7, FIQED2=8 };
+
+ enum RadiationType {Subtraction,Hard,Shower};
+
+public:
+
+ /** @name Standard constructors and destructors. */
+ //@{
+ /**
+ * The default constructor.
+ */
+ MEPP2GammaGammaPowheg();
+ //@}
+
+ /** @name Member functions for the generation of hard QCD radiation */
+ //@{
+ /**
+ * Has a POWHEG style correction
+ */
+ virtual POWHEGType hasPOWHEGCorrection() {return ISR;}
+
+ /**
+ * Apply the POWHEG style correction
+ */
+ virtual HardTreePtr generateHardest(ShowerTreePtr,
+ vector<ShowerInteraction::Type>);
+ //@}
+
+public:
+
+ /** @name Virtual functions required by the MEBase class. */
+ //@{
+ /**
+ * Return the order in \f$\alpha_S\f$ in which this matrix
+ * element is given.
+ */
+ virtual unsigned int orderInAlphaS() const;
+
+ /**
+ * Return the order in \f$\alpha_{EW}\f$ in which this matrix
+ * element is given.
+ */
+ virtual unsigned int orderInAlphaEW() const;
+
+ /**
+ * The matrix element for the kinematical configuration
+ * previously provided by the last call to setKinematics(), suitably
+ * scaled by sHat() to give a dimension-less number.
+ * @return the matrix element scaled with sHat() to give a
+ * dimensionless number.
+ */
+ virtual double me2() const;
+
+ /**
+ * Return the scale associated with the last set phase space point.
+ */
+ virtual Energy2 scale() const;
+
+ /**
+ * The number of internal degrees of freedom used in the matrix
+ * element.
+ */
+ virtual int nDim() const;
+
+ /**
+ * Generate internal degrees of freedom given nDim() uniform
+ * random numbers in the interval \f$ ]0,1[ \f$. To help the phase space
+ * generator, the dSigHatDR should be a smooth function of these
+ * numbers, although this is not strictly necessary.
+ * @param r a pointer to the first of nDim() consecutive random numbers.
+ * @return true if the generation succeeded, otherwise false.
+ */
+ virtual bool generateKinematics(const double * r);
+
+ /**
+ * Return the matrix element squared differential in the variables
+ * given by the last call to generateKinematics().
+ */
+ virtual CrossSection dSigHatDR() const;
+
+ /**
+ * Add all possible diagrams with the add() function.
+ */
+ virtual void getDiagrams() const;
+
+ /**
+ * Get diagram selector. With the information previously supplied with the
+ * setKinematics method, a derived class may optionally
+ * override this method to weight the given diagrams with their
+ * (although certainly not physical) relative probabilities.
+ * @param dv the diagrams to be weighted.
+ * @return a Selector relating the given diagrams to their weights.
+ */
+ virtual Selector<DiagramIndex> diagrams(const DiagramVector & dv) const;
+
+ /**
+ * Return a Selector with possible colour geometries for the selected
+ * diagram weighted by their relative probabilities.
+ * @param diag the diagram chosen.
+ * @return the possible colour geometries weighted by their
+ * relative probabilities.
+ */
+ virtual Selector<const ColourLines *>
+ colourGeometries(tcDiagPtr diag) const;
+ //@}
+
+public:
+
+ /** @name Functions used by the persistent I/O system. */
+ //@{
+ /**
+ * Function used to write out object persistently.
+ * @param os the persistent output stream written to.
+ */
+ void persistentOutput(PersistentOStream & os) const;
+
+ /**
+ * Function used to read in object persistently.
+ * @param is the persistent input stream read from.
+ * @param version the version number of the object when written.
+ */
+ void persistentInput(PersistentIStream & is, int version);
+ //@}
+
+ /**
+ * The standard Init function used to initialize the interfaces.
+ * Called exactly once for each class by the class description system
+ * before the main function starts or
+ * when this class is dynamically loaded.
+ */
+ static void Init();
+
+protected:
+
+ /**
+ * Calculate of the full next-to-leading order weight
+ */
+ virtual double NLOWeight() const;
+
+ /**
+ * Leading-order matrix element for \f$q\bar q\to \gamma\gamma\f$
+ */
+ double loGammaGammaME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first=false) const;
+
+ /**
+ * Leading-order matrix element for \f$qg\to \gamma q\f$
+ */
+ double loGammaqME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first=false) const;
+
+ /**
+ * Leading-order matrix element for \f$g\bar q\to \gamma \bar q\f$
+ */
+ double loGammaqbarME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first=false) const;
+
+ /**
+ * Leading-order matrix element for \f$q\bar q\to \gamma g\f$
+ */
+ double loGammagME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ bool first=false) const;
+
+ /**
+ * Real emission matrix element for \f$q\bar q\to \gamma \gamma g\f$
+ */
+ InvEnergy2 realGammaGammagME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ DipoleType dipole, RadiationType rad,
+ bool first=false) const;
+
+ /**
+ * Real emission matrix element for \f$qg\to \gamma \gamma q\f$
+ */
+ InvEnergy2 realGammaGammaqME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ DipoleType dipole, RadiationType rad,
+ bool first=false) const;
+
+ /**
+ * Real emission matrix element for \f$g\bar q\to \gamma \gamma \bar q\f$
+ */
+ InvEnergy2 realGammaGammaqbarME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta,
+ DipoleType dipole, RadiationType rad,
+ bool first=false) const;
+
+ /**
+ * The dipole subtractedvirtual contribution
+ */
+ double subtractedVirtual() const;
+
+ /**
+ * Subtracted real contribution
+ */
+ double subtractedReal(pair<double,double> x, double z,
+ double zJac, double oldqPDF, double newqPDF,
+ double newgPDF,bool order) const;
+
+ /**
+ * Calculate of the collinear counterterms
+ */
+ //@{
+ /**
+ * Quark collinear counter term
+ */
+ double collinearQuark(double x, Energy2 mu2, double jac, double z,
+ double oldPDF, double newPDF) const;
+
+ /**
+ * Gluon collinear counter term
+ */
+ double collinearGluon(Energy2 mu2, double jac, double z,
+ double oldPDF, double newPDF) const;
+ //@}
+
+ /**
+ * The real matrix element divided by \f$2 g_S^2\f$, to be implemented in the
+ * inheriting classes.
+ * @param particles The ParticleData objects of the particles
+ * @param momenta The momenta of the particles
+ */
+ double realME(const cPDVector & particles,
+ const vector<Lorentz5Momentum> & momenta) const;
+
+ /**
+ * Generate hard QCD emission
+ */
+ HardTreePtr hardQCDEmission(vector<ShowerProgenitorPtr>);
+
+ /**
+ * Generate hard QED emission
+ */
+ HardTreePtr hardQEDEmission(vector<ShowerProgenitorPtr>);
+
+ /**
+ * The supression function
+ */
+ pair<double,double> supressionFunction(Energy pT,Energy scale) const {
+ if(supressionScale_==0) scale = lambda_;
+ Energy2 scale2 = sqr(scale), pT2 = sqr(pT);
+ switch( supressionFunction_ ) {
+ case 0:
+ return make_pair(1.,0.);
+ case 1:
+ if(pT < scale ) return make_pair(1.,0.);
+ else return make_pair(0.,1.);
+ case 2:
+ return make_pair(scale2/(pT2+scale2),pT2/(pT2+scale2));
+ default:
+ assert(false);
+ }
+ }
+
+
+protected:
+
+ /** @name Clone Methods. */
+ //@{
+ /**
+ * Make a simple clone of this object.
+ * @return a pointer to the new object.
+ */
+ virtual IBPtr clone() const;
+
+ /** Make a clone of this object, possibly modifying the cloned object
+ * to make it sane.
+ * @return a pointer to the new object.
+ */
+ virtual IBPtr fullclone() const;
+ //@}
+protected:
+
+ /** @name Standard Interfaced functions. */
+ //@{
+ /**
+ * Initialize this object after the setup phase before saving an
+ * EventGenerator to disk.
+ * @throws InitException if object could not be initialized properly.
+ */
+ virtual void doinit();
+ //@}
+
+private:
+
+ /**
+ * The assignment operator is private and must never be called.
+ * In fact, it should not even be implemented.
+ */
+ MEPP2GammaGammaPowheg & operator=(const MEPP2GammaGammaPowheg &);
+
+private:
+
+ /**
+ * Vertices
+ */
+ //@{
+ /**
+ * FFPVertex
+ */
+ AbstractFFVVertexPtr FFPvertex_;
+
+ /**
+ * FFGVertex
+ */
+ AbstractFFVVertexPtr FFGvertex_;
+ //@}
+
+ /**
+ * Kinematic variables for the real radiation
+ */
+ //@{
+ /**
+ * First variable
+ */
+ mutable double zTilde_;
+
+ /**
+ * Second variable
+ */
+ mutable double vTilde_;
+
+ /**
+ * Azimuthal angle
+ */
+ mutable double phi_;
+ //@}
+
+ /**
+ * Whether to generate the positive, negative or leading order contribution
+ */
+ unsigned int contrib_;
+
+ /**
+ * Power for sampling \f$x_p\f$
+ */
+ double power_;
+
+ /**
+ * Pointer to the gluon ParticleData object
+ */
+ tcPDPtr gluon_;
+
+ /**
+ * Processes
+ */
+ unsigned int process_;
+
+ /**
+ * Processes
+ */
+ unsigned int threeBodyProcess_;
+
+ /**
+ * Allowed flavours of the incoming quarks
+ */
+ int maxflavour_;
+
+ /**
+ * Factor for \f$C_F\f$ dependent pieces
+ */
+ mutable double CFfact_;
+
+ /**
+ * Factor for \f$T_R\f$ dependent pieces
+ */
+ mutable double TRfact_;
+
+ /**
+ * Strong coupling
+ */
+ mutable double alphaS_;
+
+ /**
+ * Use a fixed value of \f$\alpha_S\f$
+ */
+ bool fixedAlphaS_;
+
+ /**
+ * Electromagnetic coupling
+ */
+ mutable double alphaEM_;
+
+ /**
+ * Leading-order matrix element
+ */
+ mutable double loME_;
+
+ /**
+ * The matrix element
+ */
+ mutable ProductionMatrixElement me_;
+
+ /**
+ * the selected dipole
+ */
+ mutable DipoleType dipole_;
+
+ /**
+ * Supression Function
+ */
+ //@{
+ /**
+ * Choice of the supression function
+ */
+ unsigned int supressionFunction_;
+
+ /**
+ * Choice for the scale in the supression function
+ */
+ unsigned int supressionScale_;
+
+ /**
+ * Scalar for the supression function
+ */
+ Energy lambda_;
+ //@}
+
+
+ /**
+ * Hard emission stuff
+ */
+ //@{
+ /**
+ * Whether the quark is in the + or - z direction
+ */
+ bool quarkplus_;
+ //@}
+
+ /**
+ * Properties of the incoming particles
+ */
+ //@{
+ /**
+ * Pointers to the BeamParticleData objects
+ */
+ vector<tcBeamPtr> beams_;
+
+ /**
+ * Pointers to the ParticleDataObjects for the partons
+ */
+ vector<tcPDPtr> partons_;
+ //@}
+
+ /**
+ * Constants for the sampling. The distribution is assumed to have the
+ * form \f$\frac{c}{{\rm GeV}}\times\left(\frac{{\rm GeV}}{p_T}\right)^n\f$
+ */
+ //@{
+ /**
+ * The prefactor, \f$c\f$ for the \f$q\bar{q}\f$ channel
+ */
+ double preQCDqqbarq_;
+ /**
+ * The prefactor, \f$c\f$ for the \f$q\bar{q}\f$ channel
+ */
+ double preQCDqqbarqbar_;
+
+ /**
+ * The prefactor, \f$c\f$ for the \f$qg\f$ channel
+ */
+ double preQCDqg_;
+
+ /**
+ * The prefactor, \f$c\f$ for the \f$g\bar{q}\f$ channel
+ */
+ double preQCDgqbar_;
+
+ double preQEDqqbarq_;
+ double preQEDqqbarqbar_;
+ double preQEDqgq_;
+ double preQEDgqbarqbar_;
+
+ /**
+ * The prefactors as a vector for easy use
+ */
+ vector<double> prefactor_;
+ //@}
+
+ /**
+ * The transverse momentum of the jet
+ */
+ Energy minpT_;
+
+ /**
+ * Pointer to the object calculating the strong coupling
+ */
+ ShowerAlphaPtr alphaQCD_;
+
+ /**
+ * Pointer to the object calculating the EM
+ */
+ ShowerAlphaPtr alphaQED_;
+
+ /**
+ * Scale choice
+ */
+ unsigned int scaleChoice_;
+
+ /**
+ * Scale factor
+ */
+ double scalePreFactor_;
+
+};
+
+}
+
+#endif /* HERWIG_MEPP2GammaGammaPowheg_H */
diff --git a/MatrixElement/Powheg/Makefile.am b/MatrixElement/Powheg/Makefile.am
--- a/MatrixElement/Powheg/Makefile.am
+++ b/MatrixElement/Powheg/Makefile.am
@@ -1,16 +1,17 @@
pkglib_LTLIBRARIES = HwPowhegMEHadron.la HwPowhegMELepton.la
HwPowhegMEHadron_la_LDFLAGS = $(AM_LDFLAGS) -module -version-info 6:0:0
HwPowhegMEHadron_la_SOURCES = \
MEqq2gZ2ffPowheg.cc MEqq2gZ2ffPowheg.h \
MEqq2W2ffPowheg.cc MEqq2W2ffPowheg.h \
MEPP2HiggsPowheg.cc MEPP2HiggsPowheg.h \
MEPP2WHPowheg.cc MEPP2WHPowheg.h \
MEPP2ZHPowheg.cc MEPP2ZHPowheg.h \
MEPP2VVPowheg.cc MEPP2VVPowheg.h \
VVKinematics.cc VVKinematics.h \
+MEPP2GammaGammaPowheg.cc MEPP2GammaGammaPowheg.h \
MEPP2HiggsVBFPowheg.cc MEPP2HiggsVBFPowheg.h
HwPowhegMELepton_la_LDFLAGS = $(AM_LDFLAGS) -module -version-info 1:0:0
HwPowhegMELepton_la_SOURCES = \
MEee2gZ2qqPowheg.cc MEee2gZ2qqPowheg.h \
MEee2gZ2llPowheg.cc MEee2gZ2llPowheg.h
diff --git a/Shower/Base/Evolver.cc b/Shower/Base/Evolver.cc
--- a/Shower/Base/Evolver.cc
+++ b/Shower/Base/Evolver.cc
@@ -1,3630 +1,3630 @@
// -*- C++ -*-
//
// Evolver.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2011 The Herwig Collaboration
//
// Herwig is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the Evolver class.
//
#include "Evolver.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/RefVector.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "Herwig/Shower/Base/ShowerParticle.h"
#include "ThePEG/Utilities/EnumIO.h"
#include "ShowerKinematics.h"
#include "ThePEG/PDT/EnumParticles.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/Handlers/EventHandler.h"
#include "ThePEG/Utilities/Throw.h"
#include "ShowerTree.h"
#include "ShowerProgenitor.h"
#include "KinematicsReconstructor.h"
#include "PartnerFinder.h"
#include "ThePEG/Handlers/StandardXComb.h"
#include "ThePEG/PDT/DecayMode.h"
#include "Herwig/Shower/ShowerHandler.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "ShowerVertex.h"
#include "ThePEG/Repository/CurrentGenerator.h"
#include "Herwig/MatrixElement/Matchbox/Base/SubtractedME.h"
#include "Herwig/MatrixElement/Matchbox/MatchboxFactory.h"
#include "ThePEG/Handlers/StandardXComb.h"
using namespace Herwig;
namespace {
/**
* A struct to order the particles in the same way as in the DecayMode's
*/
struct ParticleOrdering {
/**
* Operator for the ordering
* @param p1 The first ParticleData object
* @param p2 The second ParticleData object
*/
bool operator() (tcPDPtr p1, tcPDPtr p2) {
return abs(p1->id()) > abs(p2->id()) ||
( abs(p1->id()) == abs(p2->id()) && p1->id() > p2->id() ) ||
( p1->id() == p2->id() && p1->fullName() > p2->fullName() );
}
};
typedef multiset<tcPDPtr,ParticleOrdering> OrderedParticles;
/**
* Cached lookup of decay modes.
* Generator::findDecayMode() is not efficient.
*/
tDMPtr findDecayMode(const string & tag) {
static map<string,DMPtr> cache;
map<string,DMPtr>::const_iterator pos = cache.find(tag);
if ( pos != cache.end() )
return pos->second;
tDMPtr dm = CurrentGenerator::current().findDecayMode(tag);
cache[tag] = dm;
return dm;
}
}
DescribeClass<Evolver,Interfaced>
describeEvolver ("Herwig::Evolver","HwShower.so");
bool Evolver::_hardEmissionModeWarn = true;
bool Evolver::_missingTruncWarn = true;
IBPtr Evolver::clone() const {
return new_ptr(*this);
}
IBPtr Evolver::fullclone() const {
return new_ptr(*this);
}
void Evolver::persistentOutput(PersistentOStream & os) const {
os << _model << _splittingGenerator << _maxtry
<< _meCorrMode << _hardVetoMode << _hardVetoRead << _hardVetoReadOption
<< _limitEmissions << _spinOpt << _softOpt << _hardPOWHEG
<< ounit(_iptrms,GeV) << _beta << ounit(_gamma,GeV) << ounit(_iptmax,GeV)
<< _vetoes << _trunc_Mode << _hardEmissionMode << _reconOpt
<< isMCatNLOSEvent << isMCatNLOHEvent
<< isPowhegSEvent << isPowhegHEvent
<< theFactorizationScaleFactor << theRenormalizationScaleFactor << ounit(muPt,GeV)
<< interaction_ << _maxTryFSR << _maxFailFSR << _fracFSR << interactions_.size();
for(unsigned int ix=0;ix<interactions_.size();++ix)
os << oenum(interactions_[ix]);
}
void Evolver::persistentInput(PersistentIStream & is, int) {
unsigned int isize;
is >> _model >> _splittingGenerator >> _maxtry
>> _meCorrMode >> _hardVetoMode >> _hardVetoRead >> _hardVetoReadOption
>> _limitEmissions >> _spinOpt >> _softOpt >> _hardPOWHEG
>> iunit(_iptrms,GeV) >> _beta >> iunit(_gamma,GeV) >> iunit(_iptmax,GeV)
>> _vetoes >> _trunc_Mode >> _hardEmissionMode >> _reconOpt
>> isMCatNLOSEvent >> isMCatNLOHEvent
>> isPowhegSEvent >> isPowhegHEvent
>> theFactorizationScaleFactor >> theRenormalizationScaleFactor >> iunit(muPt,GeV)
>> interaction_ >> _maxTryFSR >> _maxFailFSR >> _fracFSR >> isize;
interactions_.resize(isize);
for(unsigned int ix=0;ix<interactions_.size();++ix)
is >> ienum(interactions_[ix]);
}
void Evolver::doinit() {
Interfaced::doinit();
// interactions may have been changed through a setup file so we
// clear it up here
interactions_.clear();
if(interaction_==0) {
interactions_.push_back(ShowerInteraction::QCD);
interactions_.push_back(ShowerInteraction::QED);
}
else if(interaction_==1) {
interactions_.push_back(ShowerInteraction::QCD);
}
else if(interaction_==2) {
interactions_.push_back(ShowerInteraction::QED);
interactions_.push_back(ShowerInteraction::QCD);
}
else if(interaction_==3) {
interactions_.push_back(ShowerInteraction::QED);
}
else if(interaction_==4) {
interactions_.push_back(ShowerInteraction::Both);
}
// calculate max no of FSR vetos
_maxFailFSR = max(int(_maxFailFSR), int(_fracFSR*double(generator()->N())));
}
void Evolver::Init() {
static ClassDocumentation<Evolver> documentation
("This class is responsible for carrying out the showering,",
"including the kinematics reconstruction, in a given scale range,"
"including the option of the POWHEG approach to simulated next-to-leading order"
" radiation\\cite{Nason:2004rx}.",
"%\\cite{Nason:2004rx}\n"
"\\bibitem{Nason:2004rx}\n"
" P.~Nason,\n"
" ``A new method for combining NLO QCD with shower Monte Carlo algorithms,''\n"
" JHEP {\\bf 0411} (2004) 040\n"
" [arXiv:hep-ph/0409146].\n"
" %%CITATION = JHEPA,0411,040;%%\n");
static Reference<Evolver,SplittingGenerator>
interfaceSplitGen("SplittingGenerator",
"A reference to the SplittingGenerator object",
&Herwig::Evolver::_splittingGenerator,
false, false, true, false);
static Reference<Evolver,ShowerModel> interfaceShowerModel
("ShowerModel",
"The pointer to the object which defines the shower evolution model.",
&Evolver::_model, false, false, true, false, false);
static Parameter<Evolver,unsigned int> interfaceMaxTry
("MaxTry",
"The maximum number of attempts to generate the shower from a"
" particular ShowerTree",
&Evolver::_maxtry, 100, 1, 1000,
false, false, Interface::limited);
static Switch<Evolver, unsigned int> ifaceMECorrMode
("MECorrMode",
"Choice of the ME Correction Mode",
&Evolver::_meCorrMode, 1, false, false);
static SwitchOption off
(ifaceMECorrMode,"No","MECorrections off", 0);
static SwitchOption on
(ifaceMECorrMode,"Yes","hard+soft on", 1);
static SwitchOption hard
(ifaceMECorrMode,"Hard","only hard on", 2);
static SwitchOption soft
(ifaceMECorrMode,"Soft","only soft on", 3);
static Switch<Evolver, unsigned int> ifaceHardVetoMode
("HardVetoMode",
"Choice of the Hard Veto Mode",
&Evolver::_hardVetoMode, 1, false, false);
static SwitchOption HVoff
(ifaceHardVetoMode,"No","hard vetos off", 0);
static SwitchOption HVon
(ifaceHardVetoMode,"Yes","hard vetos on", 1);
static SwitchOption HVIS
(ifaceHardVetoMode,"Initial", "only IS emissions vetoed", 2);
static SwitchOption HVFS
(ifaceHardVetoMode,"Final","only FS emissions vetoed", 3);
static Switch<Evolver, unsigned int> ifaceHardVetoRead
("HardVetoScaleSource",
"If hard veto scale is to be read",
&Evolver::_hardVetoRead, 0, false, false);
static SwitchOption HVRcalc
(ifaceHardVetoRead,"Calculate","Calculate from hard process", 0);
static SwitchOption HVRread
(ifaceHardVetoRead,"Read","Read from XComb->lastScale", 1);
static Switch<Evolver, bool> ifaceHardVetoReadOption
("HardVetoReadOption",
"Apply read-in scale veto to all collisions or just the primary one?",
&Evolver::_hardVetoReadOption, false, false, false);
static SwitchOption AllCollisions
(ifaceHardVetoReadOption,
"AllCollisions",
"Read-in pT veto applied to primary and secondary collisions.",
false);
static SwitchOption PrimaryCollision
(ifaceHardVetoReadOption,
"PrimaryCollision",
"Read-in pT veto applied to primary but not secondary collisions.",
true);
static Parameter<Evolver, Energy> ifaceiptrms
("IntrinsicPtGaussian",
"RMS of intrinsic pT of Gaussian distribution:\n"
"2*(1-Beta)*exp(-sqr(intrinsicpT/RMS))/sqr(RMS)",
&Evolver::_iptrms, GeV, ZERO, ZERO, 1000000.0*GeV,
false, false, Interface::limited);
static Parameter<Evolver, double> ifacebeta
("IntrinsicPtBeta",
"Proportion of inverse quadratic distribution in generating intrinsic pT.\n"
"(1-Beta) is the proportion of Gaussian distribution",
&Evolver::_beta, 0, 0, 1,
false, false, Interface::limited);
static Parameter<Evolver, Energy> ifacegamma
("IntrinsicPtGamma",
"Parameter for inverse quadratic:\n"
"2*Beta*Gamma/(sqr(Gamma)+sqr(intrinsicpT))",
&Evolver::_gamma,GeV, ZERO, ZERO, 100000.0*GeV,
false, false, Interface::limited);
static Parameter<Evolver, Energy> ifaceiptmax
("IntrinsicPtIptmax",
"Upper bound on intrinsic pT for inverse quadratic",
&Evolver::_iptmax,GeV, ZERO, ZERO, 100000.0*GeV,
false, false, Interface::limited);
static RefVector<Evolver,ShowerVeto> ifaceVetoes
("Vetoes",
"The vetoes to be checked during showering",
&Evolver::_vetoes, -1,
false,false,true,true,false);
static Switch<Evolver,unsigned int> interfaceLimitEmissions
("LimitEmissions",
"Limit the number and type of emissions for testing",
&Evolver::_limitEmissions, 0, false, false);
static SwitchOption interfaceLimitEmissionsNoLimit
(interfaceLimitEmissions,
"NoLimit",
"Allow an arbitrary number of emissions",
0);
static SwitchOption interfaceLimitEmissionsOneInitialStateEmission
(interfaceLimitEmissions,
"OneInitialStateEmission",
"Allow one emission in the initial state and none in the final state",
1);
static SwitchOption interfaceLimitEmissionsOneFinalStateEmission
(interfaceLimitEmissions,
"OneFinalStateEmission",
"Allow one emission in the final state and none in the initial state",
2);
static SwitchOption interfaceLimitEmissionsHardOnly
(interfaceLimitEmissions,
"HardOnly",
"Only allow radiation from the hard ME correction",
3);
static SwitchOption interfaceLimitEmissionsOneEmission
(interfaceLimitEmissions,
"OneEmission",
"Allow one emission in either the final state or initial state, but not both",
4);
static Switch<Evolver,bool> interfaceTruncMode
("TruncatedShower", "Include the truncated shower?",
&Evolver::_trunc_Mode, 1, false, false);
static SwitchOption interfaceTruncMode0
(interfaceTruncMode,"No","Truncated Shower is OFF", 0);
static SwitchOption interfaceTruncMode1
(interfaceTruncMode,"Yes","Truncated Shower is ON", 1);
static Switch<Evolver,int> interfaceHardEmissionMode
("HardEmissionMode",
"Whether to use ME corrections or POWHEG for the hardest emission",
&Evolver::_hardEmissionMode, 0, false, false);
static SwitchOption interfaceHardEmissionModeDecayMECorrection
(interfaceHardEmissionMode,
"DecayMECorrection",
"Old fashioned ME correction for decays only",
-1);
static SwitchOption interfaceHardEmissionModeMECorrection
(interfaceHardEmissionMode,
"MECorrection",
"Old fashioned ME correction",
0);
static SwitchOption interfaceHardEmissionModePOWHEG
(interfaceHardEmissionMode,
"POWHEG",
"Powheg style hard emission using internal matrix elements",
1);
static SwitchOption interfaceHardEmissionModeMatchboxPOWHEG
(interfaceHardEmissionMode,
"MatchboxPOWHEG",
"Powheg style emission for the hard process using Matchbox",
2);
static SwitchOption interfaceHardEmissionModeFullPOWHEG
(interfaceHardEmissionMode,
"FullPOWHEG",
"Powheg style emission for the hard process using Matchbox "
"and decays using internal matrix elements",
3);
static Switch<Evolver,unsigned int > interfaceInteractions
("Interactions",
"The interactions to be used in the shower",
&Evolver::interaction_, 1, false, false);
static SwitchOption interfaceInteractionsQCDFirst
(interfaceInteractions,
"QCDFirst",
"QCD first then QED",
0);
static SwitchOption interfaceInteractionsQCDOnly
(interfaceInteractions,
"QCDOnly",
"Only QCD",
1);
static SwitchOption interfaceInteractionsQEDFirst
(interfaceInteractions,
"QEDFirst",
"QED first then QCD",
2);
static SwitchOption interfaceInteractionsQEDOnly
(interfaceInteractions,
"QEDOnly",
"Only QED",
3);
static SwitchOption interfaceInteractionsBothAtOnce
(interfaceInteractions,
"BothAtOnce",
"Generate both at the same time",
4);
static Switch<Evolver,unsigned int> interfaceReconstructionOption
("ReconstructionOption",
"Treatment of the reconstruction of the transverse momentum of "
"a branching from the evolution scale.",
&Evolver::_reconOpt, 0, false, false);
static SwitchOption interfaceReconstructionOptionCutOff
(interfaceReconstructionOption,
"CutOff",
"Use the cut-off masses in the calculation",
0);
static SwitchOption interfaceReconstructionOptionOffShell
(interfaceReconstructionOption,
"OffShell",
"Use the off-shell masses in the calculation veto the emission of the parent,"
" no veto in generation of emissions from children",
1);
static SwitchOption interfaceReconstructionOptionOffShell2
(interfaceReconstructionOption,
"OffShell2",
"Use the off-shell masses in the calculation veto the emissions from the children."
" no veto in generation of emissions from children",
2);
static SwitchOption interfaceReconstructionOptionOffShell3
(interfaceReconstructionOption,
"OffShell3",
"Use the off-shell masses in the calculation veto the emissions from the children."
" veto in generation of emissions from children using cut-off for second parton",
3);
static Switch<Evolver,unsigned int> interfaceSpinCorrelations
("SpinCorrelations",
"Treatment of spin correlations in the parton shower",
&Evolver::_spinOpt, 1, false, false);
static SwitchOption interfaceSpinCorrelationsOff
(interfaceSpinCorrelations,
"No",
"No spin correlations",
0);
static SwitchOption interfaceSpinCorrelationsSpin
(interfaceSpinCorrelations,
"Yes",
"Include the azimuthal spin correlations only",
1);
static Switch<Evolver,unsigned int> interfaceSoftCorrelations
("SoftCorrelations",
"Option for the treatment of soft correlations in the parton shower",
&Evolver::_softOpt, 2, false, false);
static SwitchOption interfaceSoftCorrelationsNone
(interfaceSoftCorrelations,
"No",
"No soft correlations",
0);
static SwitchOption interfaceSoftCorrelationsFull
(interfaceSoftCorrelations,
"Full",
"Use the full eikonal",
1);
static SwitchOption interfaceSoftCorrelationsSingular
(interfaceSoftCorrelations,
"Singular",
"Use original Webber-Marchisini form",
2);
static Switch<Evolver,bool> interfaceHardPOWHEG
("HardPOWHEG",
"Treatment of powheg emissions which are too hard to have a shower interpretation",
&Evolver::_hardPOWHEG, false, false, false);
static SwitchOption interfaceHardPOWHEGAsShower
(interfaceHardPOWHEG,
"AsShower",
"Still interpret as shower emissions",
false);
static SwitchOption interfaceHardPOWHEGRealEmission
(interfaceHardPOWHEG,
"RealEmission",
"Generate shower from the real emmission configuration",
true);
static Parameter<Evolver,unsigned int> interfaceMaxTryFSR
("MaxTryFSR",
"The maximum number of attempted FSR emissions in"
" the generation of the FSR",
&Evolver::_maxTryFSR, 100000, 10, 100000000,
false, false, Interface::limited);
static Parameter<Evolver,unsigned int> interfaceMaxFailFSR
("MaxFailFSR",
"Maximum number of failures generating the FSR",
&Evolver::_maxFailFSR, 100, 1, 100000000,
false, false, Interface::limited);
static Parameter<Evolver,double> interfaceFSRFailureFraction
("FSRFailureFraction",
"Maximum fraction of events allowed to fail due to too many FSR emissions",
&Evolver::_fracFSR, 0.001, 1e-10, 1,
false, false, Interface::limited);
}
void Evolver::generateIntrinsicpT(vector<ShowerProgenitorPtr> particlesToShower) {
_intrinsic.clear();
if ( !ipTon() || !isISRadiationON() ) return;
// don't do anything for the moment for secondary scatters
if( !ShowerHandler::currentHandler()->firstInteraction() ) return;
// generate intrinsic pT
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
// only consider initial-state particles
if(particlesToShower[ix]->progenitor()->isFinalState()) continue;
if(!particlesToShower[ix]->progenitor()->dataPtr()->coloured()) continue;
Energy ipt;
if(UseRandom::rnd() > _beta) {
ipt=_iptrms*sqrt(-log(UseRandom::rnd()));
}
else {
ipt=_gamma*sqrt(pow(1.+sqr(_iptmax/_gamma), UseRandom::rnd())-1.);
}
pair<Energy,double> pt = make_pair(ipt,UseRandom::rnd(Constants::twopi));
_intrinsic[particlesToShower[ix]] = pt;
}
}
void Evolver::setupMaximumScales(const vector<ShowerProgenitorPtr> & p,
XCPtr xcomb) {
// let POWHEG events radiate freely
if(_hardEmissionMode>0&&hardTree()) {
vector<ShowerProgenitorPtr>::const_iterator ckt = p.begin();
for (; ckt != p.end(); ckt++) (*ckt)->maxHardPt(Constants::MaxEnergy);
return;
}
// return if no vetos
if (!hardVetoOn()) return;
// find out if hard partonic subprocess.
bool isPartonic(false);
map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator
cit = _currenttree->incomingLines().begin();
Lorentz5Momentum pcm;
for(; cit!=currentTree()->incomingLines().end(); ++cit) {
pcm += cit->first->progenitor()->momentum();
isPartonic |= cit->first->progenitor()->coloured();
}
// find minimum pt from hard process, the maximum pt from all outgoing
// coloured lines (this is simpler and more general than
// 2stu/(s^2+t^2+u^2)). Maximum scale for scattering processes will
// be transverse mass.
Energy ptmax = generator()->maximumCMEnergy();
// general case calculate the scale
if (!hardVetoXComb()||
(hardVetoReadOption()&&
!ShowerHandler::currentHandler()->firstInteraction())) {
// scattering process
if(currentTree()->isHard()) {
assert(xcomb);
// coloured incoming particles
if (isPartonic) {
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
cjt = currentTree()->outgoingLines().begin();
for(; cjt!=currentTree()->outgoingLines().end(); ++cjt) {
if (cjt->first->progenitor()->coloured())
ptmax = min(ptmax,cjt->first->progenitor()->momentum().mt());
}
}
if (ptmax == generator()->maximumCMEnergy() ) ptmax = pcm.m();
if(hardVetoXComb()&&hardVetoReadOption()&&
!ShowerHandler::currentHandler()->firstInteraction()) {
- ptmax=min(ptmax,sqrt(xcomb->lastCentralScale()));
+ ptmax=min(ptmax,sqrt(xcomb->lastShowerScale()));
}
}
// decay, incoming() is the decaying particle.
else {
ptmax = currentTree()->incomingLines().begin()->first
->progenitor()->momentum().mass();
}
}
// hepeup.SCALUP is written into the lastXComb by the
// LesHouchesReader itself - use this by user's choice.
// Can be more general than this.
else {
if(currentTree()->isHard()) {
assert(xcomb);
- ptmax = sqrt( xcomb->lastCentralScale() );
+ ptmax = sqrt( xcomb->lastShowerScale() );
}
else {
ptmax = currentTree()->incomingLines().begin()->first
->progenitor()->momentum().mass();
}
}
ptmax *= ShowerHandler::currentHandler()->hardScaleFactor();
// set maxHardPt for all progenitors. For partonic processes this
// is now the max pt in the FS, for non-partonic processes or
// processes with no coloured FS the invariant mass of the IS
vector<ShowerProgenitorPtr>::const_iterator ckt = p.begin();
for (; ckt != p.end(); ckt++) (*ckt)->maxHardPt(ptmax);
}
void Evolver::setupHardScales(const vector<ShowerProgenitorPtr> & p,
XCPtr xcomb) {
if ( hardVetoXComb() &&
(!hardVetoReadOption() ||
ShowerHandler::currentHandler()->firstInteraction()) ) {
Energy hardScale = ZERO;
if(currentTree()->isHard()) {
assert(xcomb);
- hardScale = sqrt( xcomb->lastCentralScale() );
+ hardScale = sqrt( xcomb->lastShowerScale() );
}
else {
hardScale = currentTree()->incomingLines().begin()->first
->progenitor()->momentum().mass();
}
hardScale *= ShowerHandler::currentHandler()->hardScaleFactor();
vector<ShowerProgenitorPtr>::const_iterator ckt = p.begin();
for (; ckt != p.end(); ckt++) (*ckt)->hardScale(hardScale);
muPt = hardScale;
}
}
void Evolver::showerHardProcess(ShowerTreePtr hard, XCPtr xcomb) {
isMCatNLOSEvent = false;
isMCatNLOHEvent = false;
isPowhegSEvent = false;
isPowhegHEvent = false;
Ptr<SubtractedME>::tptr subme;
Ptr<MatchboxMEBase>::tptr me;
Ptr<SubtractionDipole>::tptr dipme;
Ptr<StandardXComb>::ptr sxc = dynamic_ptr_cast<Ptr<StandardXComb>::ptr>(xcomb);
if ( sxc ) {
subme = dynamic_ptr_cast<Ptr<SubtractedME>::tptr>(sxc->matrixElement());
me = dynamic_ptr_cast<Ptr<MatchboxMEBase>::tptr>(sxc->matrixElement());
dipme = dynamic_ptr_cast<Ptr<SubtractionDipole>::tptr>(sxc->matrixElement());
}
if ( subme ) {
if ( subme->showerApproximation() ) {
theShowerApproximation = subme->showerApproximation();
// separate MCatNLO and POWHEG-type corrections
if ( !subme->showerApproximation()->needsSplittingGenerator() ) {
if ( subme->realShowerSubtraction() )
isMCatNLOHEvent = true;
else if ( subme->virtualShowerSubtraction() )
isMCatNLOSEvent = true;
}
else {
if ( subme->realShowerSubtraction() )
isPowhegHEvent = true;
else if ( subme->virtualShowerSubtraction() || subme->loopSimSubtraction() )
isPowhegSEvent = true;
}
}
} else if ( me ) {
if ( me->factory()->showerApproximation() ) {
theShowerApproximation = me->factory()->showerApproximation();
if ( !me->factory()->showerApproximation()->needsSplittingGenerator() )
isMCatNLOSEvent = true;
else
isPowhegSEvent = true;
}
}
string error = "Inconsistent hard emission set-up in Evolver::showerHardProcess(). ";
if ( ( isMCatNLOSEvent || isMCatNLOHEvent ) ){
if (_hardEmissionMode > 1)
throw Exception() << error
<< "Cannot generate POWHEG matching with MC@NLO shower "
<< "approximation. Add 'set Evolver:HardEmissionMode 0' to input file."
<< Exception::runerror;
if ( ShowerHandler::currentHandler()->canHandleMatchboxTrunc())
throw Exception() << error
<< "Cannot use truncated qtilde shower with MC@NLO shower "
<< "approximation. Set LHCGenerator:EventHandler"
<< ":CascadeHandler to '/Herwig/Shower/ShowerHandler' or "
<< "'/Herwig/DipoleShower/DipoleShowerHandler'."
<< Exception::runerror;
}
else if ( ((isPowhegSEvent || isPowhegHEvent) || dipme) &&
_hardEmissionMode < 2){
if ( ShowerHandler::currentHandler()->canHandleMatchboxTrunc())
throw Exception() << error
<< "Unmatched events requested for POWHEG shower "
<< "approximation. Set Evolver:HardEmissionMode to "
<< "'MatchboxPOWHEG' or 'FullPOWHEG'."
<< Exception::runerror;
else if (_hardEmissionModeWarn){
_hardEmissionModeWarn = false;
_hardEmissionMode+=2;
throw Exception() << error
<< "Unmatched events requested for POWHEG shower "
<< "approximation. Changing Evolver:HardEmissionMode from "
<< _hardEmissionMode-2 << " to " << _hardEmissionMode
<< Exception::warning;
}
}
if ( isPowhegSEvent || isPowhegHEvent) {
if (theShowerApproximation->needsTruncatedShower() &&
!ShowerHandler::currentHandler()->canHandleMatchboxTrunc() )
throw Exception() << error
<< "Current shower handler cannot generate truncated shower. "
<< "Set Generator:EventHandler:CascadeHandler to "
<< "'/Herwig/Shower/PowhegShowerHandler'."
<< Exception::runerror;
}
else if ( dipme && _missingTruncWarn){
_missingTruncWarn=false;
throw Exception() << "Warning: POWHEG shower approximation used without "
<< "truncated shower. Set Generator:EventHandler:"
<< "CascadeHandler to '/Herwig/Shower/PowhegShowerHandler' and "
<< "'MEMatching:TruncatedShower Yes'."
<< Exception::warning;
}
else if ( !dipme && _hardEmissionMode > 1 &&
ShowerHandler::currentHandler()->firstInteraction())
throw Exception() << error
<< "POWHEG matching requested for LO events. Include "
<< "'set Factory:ShowerApproximation MEMatching' in input file."
<< Exception::runerror;
_hardme = HwMEBasePtr();
// extract the matrix element
tStdXCombPtr lastXC = dynamic_ptr_cast<tStdXCombPtr>(xcomb);
if(lastXC) {
_hardme = dynamic_ptr_cast<HwMEBasePtr>(lastXC->matrixElement());
}
_decayme = HwDecayerBasePtr();
// set the current tree
currentTree(hard);
hardTree(HardTreePtr());
// number of attempts if more than one interaction switched on
unsigned int interactionTry=0;
do {
try {
// generate the showering
doShowering(true,xcomb);
// if no vetos return
return;
}
catch (InteractionVeto) {
currentTree()->clear();
++interactionTry;
}
}
while(interactionTry<=5);
throw Exception() << "Too many tries for shower in "
<< "Evolver::showerHardProcess()"
<< Exception::eventerror;
}
void Evolver::hardMatrixElementCorrection(bool hard) {
// set the initial enhancement factors for the soft correction
_initialenhance = 1.;
_finalenhance = 1.;
// if hard matrix element switched off return
if(!MECOn(hard)) return;
// see if we can get the correction from the matrix element
// or decayer
if(hard) {
if(_hardme&&_hardme->hasMECorrection()) {
_hardme->initializeMECorrection(_currenttree,
_initialenhance,_finalenhance);
if(hardMEC(hard))
_hardme->applyHardMatrixElementCorrection(_currenttree);
}
}
else {
if(_decayme&&_decayme->hasMECorrection()) {
_decayme->initializeMECorrection(_currenttree,
_initialenhance,_finalenhance);
if(hardMEC(hard))
_decayme->applyHardMatrixElementCorrection(_currenttree);
}
}
}
ShowerParticleVector Evolver::createTimeLikeChildren(tShowerParticlePtr particle, IdList ids) {
// Create the ShowerParticle objects for the two children of
// the emitting particle; set the parent/child relationship
// if same as definition create particles, otherwise create cc
tcPDPtr pdata[2];
for(unsigned int ix=0;ix<2;++ix) pdata[ix]=getParticleData(ids[ix+1]);
if(particle->id()!=ids[0]) {
for(unsigned int ix=0;ix<2;++ix) {
tPDPtr cc(pdata[ix]->CC());
if(cc) pdata[ix]=cc;
}
}
ShowerParticleVector children;
for(unsigned int ix=0;ix<2;++ix) {
children.push_back(new_ptr(ShowerParticle(pdata[ix],true)));
if(children[ix]->id()==_progenitor->id()&&!pdata[ix]->stable())
children[ix]->set5Momentum(Lorentz5Momentum(_progenitor->progenitor()->mass()));
else
children[ix]->set5Momentum(Lorentz5Momentum(pdata[ix]->mass()));
}
return children;
}
bool Evolver::timeLikeShower(tShowerParticlePtr particle,
ShowerInteraction::Type type,
Branching fb, bool first) {
// don't do anything if not needed
if(_limitEmissions == 1 || hardOnly() ||
( _limitEmissions == 2 && _nfs != 0) ||
( _limitEmissions == 4 && _nfs + _nis != 0) ) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
// too many tries
if(_nFSR>=_maxTryFSR) {
++_nFailedFSR;
// too many failed events
if(_nFailedFSR>=_maxFailFSR)
throw Exception() << "Too many events have failed due to too many shower emissions, in\n"
<< "Evolver::timeLikeShower(). Terminating run\n"
<< Exception::runerror;
throw Exception() << "Too many attempted emissions in Evolver::timeLikeShower()\n"
<< Exception::eventerror;
}
// generate the emission
ShowerParticleVector children;
int ntry=0;
// generate the emission
if(!fb.kinematics)
fb = selectTimeLikeBranching(particle,type,HardBranchingPtr());
// no emission, return
if(!fb.kinematics) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
fc[0] = Branching();
fc[1] = Branching();
++ntry;
assert(fb.kinematics);
// has emitted
// Assign the shower kinematics to the emitting particle.
if(setupChildren) {
++_nFSR;
particle->showerKinematics(fb.kinematics);
// generate phi
fb.kinematics->phi(fb.sudakov->generatePhiForward(*particle,fb.ids,fb.kinematics));
// check highest pT
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// create the children
children = createTimeLikeChildren(particle,fb.ids);
// update the children
particle->showerKinematics()->
updateChildren(particle, children,fb.type,_reconOpt>=3);
// update number of emissions
++_nfs;
if(_limitEmissions!=0) {
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
setupChildren = false;
}
// select branchings for children
fc[0] = selectTimeLikeBranching(children[0],type,HardBranchingPtr());
fc[1] = selectTimeLikeBranching(children[1],type,HardBranchingPtr());
// old default
if(_reconOpt==0) {
// shower the first particle
if(fc[0].kinematics) timeLikeShower(children[0],type,fc[0],false);
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],false);
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
break;
}
// Herwig default
else if(_reconOpt==1) {
// shower the first particle
if(fc[0].kinematics) timeLikeShower(children[0],type,fc[0],false);
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],false);
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectTimeLikeBranching(particle,type,HardBranchingPtr());
// no emission, return
if(!fb.kinematics) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
setupChildren = true;
continue;
}
else
break;
}
// veto children
else if(_reconOpt>=2) {
// cut-off masses for the branching
const vector<Energy> & virtualMasses = fb.sudakov->virtualMasses(fb.ids);
// compute the masses of the children
Energy masses[3];
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics) {
const vector<Energy> & vm = fc[ix].sudakov->virtualMasses(fc[ix].ids);
Energy2 q2 =
fc[ix].kinematics->z()*(1.-fc[ix].kinematics->z())*sqr(fc[ix].kinematics->scale());
if(fc[ix].ids[0]!=ParticleID::g) q2 += sqr(vm[0]);
masses[ix+1] = sqrt(q2);
}
else {
masses[ix+1] = virtualMasses[ix+1];
}
}
masses[0] = fb.ids[0]!=ParticleID::g ? virtualMasses[0] : ZERO;
double z = fb.kinematics->z();
Energy2 pt2 = z*(1.-z)*(z*(1.-z)*sqr(fb.kinematics->scale()) + sqr(masses[0]))
- sqr(masses[1])*(1.-z) - sqr(masses[2])*z;
if(pt2>=ZERO) {
break;
}
else {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics)
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
children[ix]->virtualMass(ZERO);
}
}
}
};
if(_reconOpt>=2) {
// shower the first particle
if(fc[0].kinematics) timeLikeShower(children[0],type,fc[0],false);
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],false);
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
}
if(first&&!children.empty())
particle->showerKinematics()->resetChildren(particle,children);
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
bool
Evolver::spaceLikeShower(tShowerParticlePtr particle, PPtr beam,
ShowerInteraction::Type type) {
//using the pdf's associated with the ShowerHandler assures, that
//modified pdf's are used for the secondary interactions via
//CascadeHandler::resetPDFs(...)
tcPDFPtr pdf;
if(ShowerHandler::currentHandler()->firstPDF().particle() == _beam)
pdf = ShowerHandler::currentHandler()->firstPDF().pdf();
if(ShowerHandler::currentHandler()->secondPDF().particle() == _beam)
pdf = ShowerHandler::currentHandler()->secondPDF().pdf();
Energy freeze = ShowerHandler::currentHandler()->pdfFreezingScale();
// don't do anything if not needed
if(_limitEmissions == 2 || hardOnly() ||
( _limitEmissions == 1 && _nis != 0 ) ||
( _limitEmissions == 4 && _nis + _nfs != 0 ) ) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
Branching bb;
// generate branching
while (true) {
bb=_splittingGenerator->chooseBackwardBranching(*particle,beam,
_initialenhance,
_beam,type,
pdf,freeze);
// return if no emission
if(!bb.kinematics) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
// if not vetoed break
if(!spaceLikeVetoed(bb,particle)) break;
// otherwise reset scale and continue
particle->vetoEmission(bb.type,bb.kinematics->scale());
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
}
// assign the splitting function and shower kinematics
particle->showerKinematics(bb.kinematics);
if(bb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(bb.kinematics->pT());
// For the time being we are considering only 1->2 branching
// particles as in Sudakov form factor
tcPDPtr part[2]={getParticleData(bb.ids[0]),
getParticleData(bb.ids[2])};
if(particle->id()!=bb.ids[1]) {
if(part[0]->CC()) part[0]=part[0]->CC();
if(part[1]->CC()) part[1]=part[1]->CC();
}
// Now create the actual particles, make the otherChild a final state
// particle, while the newParent is not
ShowerParticlePtr newParent=new_ptr(ShowerParticle(part[0],false));
ShowerParticlePtr otherChild = new_ptr(ShowerParticle(part[1],true,true));
ShowerParticleVector theChildren;
theChildren.push_back(particle);
theChildren.push_back(otherChild);
//this updates the evolution scale
particle->showerKinematics()->
updateParent(newParent, theChildren,bb.type);
// update the history if needed
_currenttree->updateInitialStateShowerProduct(_progenitor,newParent);
_currenttree->addInitialStateBranching(particle,newParent,otherChild);
// for the reconstruction of kinematics, parent/child
// relationships are according to the branching process:
// now continue the shower
++_nis;
bool emitted = _limitEmissions==0 ?
spaceLikeShower(newParent,beam,type) : false;
if(newParent->spinInfo()) newParent->spinInfo()->develop();
// now reconstruct the momentum
if(!emitted) {
if(_intrinsic.find(_progenitor)==_intrinsic.end()) {
bb.kinematics->updateLast(newParent,ZERO,ZERO);
}
else {
pair<Energy,double> kt=_intrinsic[_progenitor];
bb.kinematics->updateLast(newParent,
kt.first*cos(kt.second),
kt.first*sin(kt.second));
}
}
particle->showerKinematics()->
updateChildren(newParent, theChildren,bb.type,false);
if(_limitEmissions!=0) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
// perform the shower of the final-state particle
timeLikeShower(otherChild,type,Branching(),true);
updateHistory(otherChild);
if(theChildren[1]->spinInfo()) theChildren[1]->spinInfo()->develop();
// return the emitted
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
void Evolver::showerDecay(ShowerTreePtr decay) {
_decayme = HwDecayerBasePtr();
_hardme = HwMEBasePtr();
// find the decayer
// try the normal way if possible
tDMPtr dm = decay->incomingLines().begin()->first->original() ->decayMode();
if(!dm) dm = decay->incomingLines().begin()->first->copy() ->decayMode();
if(!dm) dm = decay->incomingLines().begin()->first->progenitor()->decayMode();
// otherwise make a string and look it up
if(!dm) {
string tag = decay->incomingLines().begin()->first->original()->dataPtr()->name()
+ "->";
OrderedParticles outgoing;
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
it=decay->outgoingLines().begin();it!=decay->outgoingLines().end();++it) {
if(abs(decay->incomingLines().begin()->first->original()->id()) == ParticleID::t &&
abs(it->first->original()->id())==ParticleID::Wplus &&
decay->treelinks().size() == 1) {
ShowerTreePtr Wtree = decay->treelinks().begin()->first;
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
it2=Wtree->outgoingLines().begin();it2!=Wtree->outgoingLines().end();++it2) {
outgoing.insert(it2->first->original()->dataPtr());
}
}
else {
outgoing.insert(it->first->original()->dataPtr());
}
}
for(OrderedParticles::const_iterator it=outgoing.begin(); it!=outgoing.end();++it) {
if(it!=outgoing.begin()) tag += ",";
tag +=(**it).name();
}
tag += ";";
dm = findDecayMode(tag);
}
if(dm) _decayme = dynamic_ptr_cast<HwDecayerBasePtr>(dm->decayer());
// set the ShowerTree to be showered
currentTree(decay);
decay->applyTransforms();
hardTree(HardTreePtr());
unsigned int interactionTry=0;
do {
try {
// generate the showering
doShowering(false,XCPtr());
// if no vetos
// force calculation of spin correlations
SpinPtr spInfo = decay->incomingLines().begin()->first->progenitor()->spinInfo();
if(spInfo) {
if(!spInfo->developed()) spInfo->needsUpdate();
spInfo->develop();
}
// and then return
return;
}
catch (InteractionVeto) {
currentTree()->clear();
++interactionTry;
}
}
while(interactionTry<=5);
throw Exception() << "Too many tries for QED shower in Evolver::showerDecay()"
<< Exception::eventerror;
}
bool Evolver::spaceLikeDecayShower(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minmass,ShowerInteraction::Type type,
Branching fb) {
// too many tries
if(_nFSR>=_maxTryFSR) {
++_nFailedFSR;
// too many failed events
if(_nFailedFSR>=_maxFailFSR)
throw Exception() << "Too many events have failed due to too many shower emissions, in\n"
<< "Evolver::timeLikeShower(). Terminating run\n"
<< Exception::runerror;
throw Exception() << "Too many attempted emissions in Evolver::timeLikeShower()\n"
<< Exception::eventerror;
}
// generate the emission
ShowerParticleVector children;
int ntry=0;
// generate the emission
if(!fb.kinematics)
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,
HardBranchingPtr());
// no emission, return
if(!fb.kinematics) return false;
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
if(particle->virtualMass()==ZERO)
particle->virtualMass(_progenitor->progenitor()->mass());
fc[0] = Branching();
fc[1] = Branching();
++ntry;
assert(fb.kinematics);
// has emitted
// Assign the shower kinematics to the emitting particle.
if(setupChildren) {
++_nFSR;
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// create the ShowerParticle objects for the two children
children = createTimeLikeChildren(particle,fb.ids);
// updateChildren the children
particle->showerKinematics()->
updateChildren(particle, children, fb.type,_reconOpt>=3);
setupChildren = false;
}
// select branchings for children
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,
type,HardBranchingPtr());
fc[1] = selectTimeLikeBranching (children[1],type,HardBranchingPtr());
// old default
if(_reconOpt==0) {
// shower the first particle
_currenttree->updateInitialStateShowerProduct(_progenitor,children[0]);
_currenttree->addInitialStateBranching(particle,children[0],children[1]);
if(fc[0].kinematics) spaceLikeDecayShower(children[0],maxScales,minmass,type,Branching());
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],true);
updateHistory(children[1]);
// branching has happened
break;
}
// Herwig default
else if(_reconOpt==1) {
// shower the first particle
_currenttree->updateInitialStateShowerProduct(_progenitor,children[0]);
_currenttree->addInitialStateBranching(particle,children[0],children[1]);
if(fc[0].kinematics) spaceLikeDecayShower(children[0],maxScales,minmass,type,Branching());
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],true);
updateHistory(children[1]);
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,
HardBranchingPtr());
// no emission, return
if(!fb.kinematics) {
return false;
}
setupChildren = true;
continue;
}
else
break;
}
else if(_reconOpt>=2) {
// cut-off masses for the branching
const vector<Energy> & virtualMasses = fb.sudakov->virtualMasses(fb.ids);
// compute the masses of the children
Energy masses[3];
// space-like children
masses[1] = children[0]->virtualMass();
// time-like child
if(fc[1].kinematics) {
const vector<Energy> & vm = fc[1].sudakov->virtualMasses(fc[1].ids);
Energy2 q2 =
fc[1].kinematics->z()*(1.-fc[1].kinematics->z())*sqr(fc[1].kinematics->scale());
if(fc[1].ids[0]!=ParticleID::g) q2 += sqr(vm[0]);
masses[2] = sqrt(q2);
}
else {
masses[2] = virtualMasses[2];
}
masses[0]=particle->virtualMass();
double z = fb.kinematics->z();
Energy2 pt2 = (1.-z)*(z*sqr(masses[0])-sqr(masses[1])-z/(1.-z)*sqr(masses[2]));
if(pt2>=ZERO) {
break;
}
else {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics)
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else {
if(ix==0)
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,Constants::MaxEnergy);
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
}
}
children[0]->virtualMass(_progenitor->progenitor()->mass());
children[1]->virtualMass(ZERO);
}
}
};
if(_reconOpt>=2) {
// In the case of splittings which involves coloured particles,
// set properly the colour flow of the branching.
// update the history if needed
_currenttree->updateInitialStateShowerProduct(_progenitor,children[0]);
_currenttree->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) spaceLikeDecayShower(children[0],maxScales,minmass,type,Branching());
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],true);
updateHistory(children[1]);
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
}
// branching has happened
return true;
}
vector<ShowerProgenitorPtr> Evolver::setupShower(bool hard) {
// generate POWHEG hard emission if needed
if(_hardEmissionMode>0) hardestEmission(hard);
ShowerInteraction::Type inter = interactions_[0];
if(_hardtree&&inter!=ShowerInteraction::Both) {
inter = _hardtree->interaction();
}
// set the initial colour partners
setEvolutionPartners(hard,inter,false);
// generate hard me if needed
if(_hardEmissionMode==0 ||
(!hard && _hardEmissionMode==-1)) hardMatrixElementCorrection(hard);
// get the particles to be showered
vector<ShowerProgenitorPtr> particlesToShower =
currentTree()->extractProgenitors();
// remake the colour partners if needed
if(_currenttree->hardMatrixElementCorrection()) {
setEvolutionPartners(hard,interactions_[0],true);
_currenttree->resetShowerProducts();
}
// return the answer
return particlesToShower;
}
void Evolver::setEvolutionPartners(bool hard,ShowerInteraction::Type type,
bool clear) {
// match the particles in the ShowerTree and hardTree
if(hardTree() && !hardTree()->connect(currentTree()))
throw Exception() << "Can't match trees in "
<< "Evolver::setEvolutionPartners()"
<< Exception::eventerror;
// extract the progenitors
vector<ShowerParticlePtr> particles =
currentTree()->extractProgenitorParticles();
// clear the partners if needed
if(clear) {
for(unsigned int ix=0;ix<particles.size();++ix) {
particles[ix]->partner(ShowerParticlePtr());
particles[ix]->clearPartners();
}
}
// sort out the colour partners
if(hardTree()) {
// find the partner
for(unsigned int ix=0;ix<particles.size();++ix) {
tHardBranchingPtr partner =
hardTree()->particles()[particles[ix]]->colourPartner();
if(!partner) continue;
for(map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
it=hardTree()->particles().begin();
it!=hardTree()->particles().end();++it) {
if(it->second==partner) particles[ix]->partner(it->first);
}
if(!particles[ix]->partner())
throw Exception() << "Can't match partners in "
<< "Evolver::setEvolutionPartners()"
<< Exception::eventerror;
}
}
// Set the initial evolution scales
showerModel()->partnerFinder()->
setInitialEvolutionScales(particles,!hard,type,!_hardtree);
if(hardTree() && _hardPOWHEG) {
bool tooHard=false;
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit=hardTree()->particles().end();
for(unsigned int ix=0;ix<particles.size();++ix) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
mit = hardTree()->particles().find(particles[ix]);
Energy hardScale(ZERO);
ShowerPartnerType::Type type(ShowerPartnerType::Undefined);
// final-state
if(particles[ix]->isFinalState()) {
if(mit!= eit && !mit->second->children().empty()) {
hardScale = mit->second->scale();
type = mit->second->type();
}
}
// initial-state
else {
if(mit!= eit && mit->second->parent()) {
hardScale = mit->second->parent()->scale();
type = mit->second->parent()->type();
}
}
if(type!=ShowerPartnerType::Undefined) {
if(type==ShowerPartnerType::QED) {
tooHard |= particles[ix]->scales().QED_noAO<hardScale;
}
else if(type==ShowerPartnerType::QCDColourLine) {
tooHard |= particles[ix]->scales().QCD_c_noAO<hardScale;
}
else if(type==ShowerPartnerType::QCDAntiColourLine) {
tooHard |= particles[ix]->scales().QCD_ac_noAO<hardScale;
}
}
}
if(tooHard) convertHardTree(hard,type);
}
}
void Evolver::updateHistory(tShowerParticlePtr particle) {
if(!particle->children().empty()) {
ShowerParticleVector theChildren;
for(unsigned int ix=0;ix<particle->children().size();++ix) {
ShowerParticlePtr part = dynamic_ptr_cast<ShowerParticlePtr>
(particle->children()[ix]);
theChildren.push_back(part);
}
// update the history if needed
if(particle==_currenttree->getFinalStateShowerProduct(_progenitor))
_currenttree->updateFinalStateShowerProduct(_progenitor,
particle,theChildren);
_currenttree->addFinalStateBranching(particle,theChildren);
for(unsigned int ix=0;ix<theChildren.size();++ix)
updateHistory(theChildren[ix]);
}
}
bool Evolver::startTimeLikeShower(ShowerInteraction::Type type) {
_nFSR = 0;
if(hardTree()) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit=hardTree()->particles().end(),
mit = hardTree()->particles().find(progenitor()->progenitor());
if( mit != eit && !mit->second->children().empty() ) {
bool output=truncatedTimeLikeShower(progenitor()->progenitor(),
mit->second ,type,Branching(),true);
if(output) updateHistory(progenitor()->progenitor());
return output;
}
}
bool output = hardOnly() ? false :
timeLikeShower(progenitor()->progenitor() ,type,Branching(),true) ;
if(output) updateHistory(progenitor()->progenitor());
return output;
}
bool Evolver::startSpaceLikeShower(PPtr parent, ShowerInteraction::Type type) {
if(hardTree()) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit =hardTree()->particles().end(),
mit = hardTree()->particles().find(progenitor()->progenitor());
if( mit != eit && mit->second->parent() ) {
return truncatedSpaceLikeShower( progenitor()->progenitor(),
parent, mit->second->parent(), type );
}
}
return hardOnly() ? false :
spaceLikeShower(progenitor()->progenitor(),parent,type);
}
bool Evolver::
startSpaceLikeDecayShower(const ShowerParticle::EvolutionScales & maxScales,
Energy minimumMass,ShowerInteraction::Type type) {
_nFSR = 0;
if(hardTree()) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit =hardTree()->particles().end(),
mit = hardTree()->particles().find(progenitor()->progenitor());
if( mit != eit && mit->second->parent() ) {
HardBranchingPtr branch=mit->second;
while(branch->parent()) branch=branch->parent();
return truncatedSpaceLikeDecayShower(progenitor()->progenitor(),maxScales,
minimumMass, branch ,type, Branching());
}
}
return hardOnly() ? false :
spaceLikeDecayShower(progenitor()->progenitor(),maxScales,minimumMass,type,Branching());
}
bool Evolver::timeLikeVetoed(const Branching & fb,
ShowerParticlePtr particle) {
// work out type of interaction
ShowerInteraction::Type type = fb.type==ShowerPartnerType::QED ?
ShowerInteraction::QED : ShowerInteraction::QCD;
// check whether emission was harder than largest pt of hard subprocess
if ( hardVetoFS() && fb.kinematics->pT() > _progenitor->maxHardPt() )
return true;
// soft matrix element correction veto
if( softMEC()) {
if(_hardme && _hardme->hasMECorrection()) {
if(_hardme->softMatrixElementVeto(_progenitor,particle,fb))
return true;
}
else if(_decayme && _decayme->hasMECorrection()) {
if(_decayme->softMatrixElementVeto(_progenitor,particle,fb))
return true;
}
}
// veto on maximum pt
if(fb.kinematics->pT()>_progenitor->maximumpT(type)) return true;
// general vetos
if (fb.kinematics && !_vetoes.empty()) {
bool vetoed=false;
for (vector<ShowerVetoPtr>::iterator v = _vetoes.begin();
v != _vetoes.end(); ++v) {
bool test = (**v).vetoTimeLike(_progenitor,particle,fb);
switch((**v).vetoType()) {
case ShowerVeto::Emission:
vetoed |= test;
break;
case ShowerVeto::Shower:
if(test) throw VetoShower();
break;
case ShowerVeto::Event:
if(test) throw Veto();
break;
}
}
if(vetoed) return true;
}
if ( ShowerHandler::currentHandler()->firstInteraction() &&
ShowerHandler::currentHandler()->profileScales() ) {
double weight =
ShowerHandler::currentHandler()->profileScales()->
hardScaleProfile(_progenitor->hardScale(),fb.kinematics->pT());
if ( UseRandom::rnd() > weight )
return true;
}
return false;
}
bool Evolver::spaceLikeVetoed(const Branching & bb,
ShowerParticlePtr particle) {
// work out type of interaction
ShowerInteraction::Type type = bb.type==ShowerPartnerType::QED ?
ShowerInteraction::QED : ShowerInteraction::QCD;
// check whether emission was harder than largest pt of hard subprocess
if (hardVetoIS() && bb.kinematics->pT() > _progenitor->maxHardPt())
return true;
// apply the soft correction
if( softMEC() && _hardme && _hardme->hasMECorrection() ) {
if(_hardme->softMatrixElementVeto(_progenitor,particle,bb))
return true;
}
// the more general vetos
// check vs max pt for the shower
if(bb.kinematics->pT()>_progenitor->maximumpT(type)) return true;
if (!_vetoes.empty()) {
bool vetoed=false;
for (vector<ShowerVetoPtr>::iterator v = _vetoes.begin();
v != _vetoes.end(); ++v) {
bool test = (**v).vetoSpaceLike(_progenitor,particle,bb);
switch ((**v).vetoType()) {
case ShowerVeto::Emission:
vetoed |= test;
break;
case ShowerVeto::Shower:
if(test) throw VetoShower();
break;
case ShowerVeto::Event:
if(test) throw Veto();
break;
}
}
if (vetoed) return true;
}
if ( ShowerHandler::currentHandler()->firstInteraction() &&
ShowerHandler::currentHandler()->profileScales() ) {
double weight =
ShowerHandler::currentHandler()->profileScales()->
hardScaleProfile(_progenitor->hardScale(),bb.kinematics->pT());
if ( UseRandom::rnd() > weight )
return true;
}
return false;
}
bool Evolver::spaceLikeDecayVetoed( const Branching & fb,
ShowerParticlePtr particle) {
// work out type of interaction
ShowerInteraction::Type type = fb.type==ShowerPartnerType::QED ?
ShowerInteraction::QED : ShowerInteraction::QCD;
// apply the soft correction
if( softMEC() && _decayme && _decayme->hasMECorrection() ) {
if(_decayme->softMatrixElementVeto(_progenitor,particle,fb))
return true;
}
// veto on hardest pt in the shower
if(fb.kinematics->pT()> _progenitor->maximumpT(type)) return true;
// general vetos
if (!_vetoes.empty()) {
bool vetoed=false;
for (vector<ShowerVetoPtr>::iterator v = _vetoes.begin();
v != _vetoes.end(); ++v) {
bool test = (**v).vetoSpaceLike(_progenitor,particle,fb);
switch((**v).vetoType()) {
case ShowerVeto::Emission:
vetoed |= test;
break;
case ShowerVeto::Shower:
if(test) throw VetoShower();
break;
case ShowerVeto::Event:
if(test) throw Veto();
break;
}
if (vetoed) return true;
}
}
return false;
}
void Evolver::hardestEmission(bool hard) {
HardTreePtr ISRTree;
if( ( _hardme && _hardme->hasPOWHEGCorrection()!=0 && _hardEmissionMode< 2) ||
( _decayme && _decayme->hasPOWHEGCorrection()!=0 && _hardEmissionMode!=2) ) {
if(_hardme) {
assert(hard);
if(interaction_==4) {
vector<ShowerInteraction::Type> inter(2);
inter[0] = ShowerInteraction::QCD;
inter[1] = ShowerInteraction::QED;
_hardtree = _hardme->generateHardest( currentTree(),inter );
}
else {
_hardtree = _hardme->generateHardest( currentTree(),interactions_ );
}
}
else {
assert(!hard);
_hardtree = _decayme->generateHardest( currentTree() );
}
// store initial state POWHEG radiation
if(_hardtree && _hardme && _hardme->hasPOWHEGCorrection()==1)
ISRTree=_hardtree;
}
else if (_hardEmissionMode>1 && hard) {
// Get minimum pT cutoff used in shower approximation
Energy maxpt = 1.*GeV;
int colouredIn = 0;
int colouredOut = 0;
for( map< ShowerProgenitorPtr, tShowerParticlePtr >::iterator it
= currentTree()->outgoingLines().begin();
it != currentTree()->outgoingLines().end(); ++it ) {
if( it->second->coloured() ) colouredOut+=1;
}
for( map< ShowerProgenitorPtr, ShowerParticlePtr >::iterator it
= currentTree()->incomingLines().begin();
it != currentTree()->incomingLines().end(); ++it ) {
if( ! it->second->coloured() ) colouredIn+=1;
}
if ( theShowerApproximation ){
if ( theShowerApproximation->ffPtCut() == theShowerApproximation->fiPtCut() &&
theShowerApproximation->ffPtCut() == theShowerApproximation->iiPtCut() )
maxpt = theShowerApproximation->ffPtCut();
else if ( colouredIn == 2 && colouredOut == 0 )
maxpt = theShowerApproximation->iiPtCut();
else if ( colouredIn == 0 && colouredOut > 1 )
maxpt = theShowerApproximation->ffPtCut();
else if ( colouredIn == 2 && colouredOut == 1 )
maxpt = min(theShowerApproximation->iiPtCut(), theShowerApproximation->fiPtCut());
else if ( colouredIn == 1 && colouredOut > 1 )
maxpt = min(theShowerApproximation->ffPtCut(), theShowerApproximation->fiPtCut());
else
maxpt = min(min(theShowerApproximation->iiPtCut(), theShowerApproximation->fiPtCut()),
theShowerApproximation->ffPtCut());
}
// Generate hardtree from born and real emission subprocesses
_hardtree = ShowerHandler::currentHandler()->generateCKKW(currentTree());
// Find transverse momentum of hardest emission
if (_hardtree){
for(set<HardBranchingPtr>::iterator it=_hardtree->branchings().begin();
it!=_hardtree->branchings().end();++it) {
if ((*it)->parent() && (*it)->status()==HardBranching::Incoming)
maxpt=(*it)->branchingParticle()->momentum().perp();
if ((*it)->children().size()==2 && (*it)->status()==HardBranching::Outgoing){
if ((*it)->branchingParticle()->id()!=21 &&
abs((*it)->branchingParticle()->id())>5 ){
if ((*it)->children()[0]->branchingParticle()->id()==21 ||
abs((*it)->children()[0]->branchingParticle()->id())<6)
maxpt=(*it)->children()[0]->branchingParticle()->momentum().perp();
else if ((*it)->children()[1]->branchingParticle()->id()==21 ||
abs((*it)->children()[1]->branchingParticle()->id())<6)
maxpt=(*it)->children()[1]->branchingParticle()->momentum().perp();
}
else {
if ( abs((*it)->branchingParticle()->id())<6){
if (abs((*it)->children()[0]->branchingParticle()->id())<6)
maxpt = (*it)->children()[1]->branchingParticle()->momentum().perp();
else
maxpt = (*it)->children()[0]->branchingParticle()->momentum().perp();
}
else maxpt = (*it)->children()[1]->branchingParticle()->momentum().perp();
}
}
}
}
// Hardest (pt) emission should be the first powheg emission.
- maxpt=min(sqrt(ShowerHandler::currentHandler()->lastXCombPtr()->lastCentralScale()),maxpt);
+ maxpt=min(sqrt(ShowerHandler::currentHandler()->lastXCombPtr()->lastShowerScale()),maxpt);
// Set maxpt to pT of emission when showering POWHEG real-emission subprocesses
if (!isPowhegSEvent && !isPowhegHEvent){
vector<int> outGluon;
vector<int> outQuark;
map< ShowerProgenitorPtr, tShowerParticlePtr >::iterator it;
for( it = currentTree()->outgoingLines().begin();
it != currentTree()->outgoingLines().end(); ++it ) {
if ( abs(it->second->id())< 6) outQuark.push_back(it->second->id());
if ( it->second->id()==21 ) outGluon.push_back(it->second->id());
}
if (outGluon.size() + outQuark.size() == 1){
for( it = currentTree()->outgoingLines().begin();
it != currentTree()->outgoingLines().end(); ++it ) {
if ( abs(it->second->id())< 6 || it->second->id()==21 )
maxpt = it->second->momentum().perp();
}
}
else if (outGluon.size() + outQuark.size() > 1){
// assume qqbar pair from a Z/gamma
if (outGluon.size()==1 && outQuark.size() == 2 && outQuark[0]==-outQuark[1]){
for( it = currentTree()->outgoingLines().begin();
it != currentTree()->outgoingLines().end(); ++it ) {
if ( it->second->id()==21 )
maxpt = it->second->momentum().perp();
}
}
// otherwise take the lowest pT avoiding born DY events
else {
maxpt = generator()->maximumCMEnergy();
for( it = currentTree()->outgoingLines().begin();
it != currentTree()->outgoingLines().end(); ++it ) {
if ( abs(it->second->id())< 6 || it->second->id()==21 )
maxpt = min(maxpt,it->second->momentum().perp());
}
}
}
}
// set maximum pT for subsequent emissions from S events
if ( isPowhegSEvent || (!isPowhegSEvent && !isPowhegHEvent)){
for( map< ShowerProgenitorPtr, tShowerParticlePtr >::iterator it
= currentTree()->outgoingLines().begin();
it != currentTree()->outgoingLines().end(); ++it ) {
if( ! it->second->coloured() ) continue;
it->first->maximumpT(maxpt, ShowerInteraction::QCD );
}
for( map< ShowerProgenitorPtr, ShowerParticlePtr >::iterator it
= currentTree()->incomingLines().begin();
it != currentTree()->incomingLines().end(); ++it ) {
if( ! it->second->coloured() ) continue;
it->first->maximumpT(maxpt, ShowerInteraction::QCD );
}
}
}
else
_hardtree = ShowerHandler::currentHandler()->generateCKKW(currentTree());
// if hard me doesn't have a FSR powheg
// correction use decay powheg correction
if (_hardme && _hardme->hasPOWHEGCorrection()<2) {
// check for intermediate colour singlet resonance
const ParticleVector inter = _hardme->subProcess()->intermediates();
if (inter.size()!=1 ||
inter[0]->momentum().m2()/GeV2 < 0 ||
inter[0]->dataPtr()->iColour()!=PDT::Colour0){
if(_hardtree) connectTrees(currentTree(),_hardtree,hard);
return;
}
map<ShowerProgenitorPtr, tShowerParticlePtr > out = currentTree()->outgoingLines();
// ignore cases where outgoing particles are not coloured
if (out.size()!=2 ||
out. begin()->second->dataPtr()->iColour()==PDT::Colour0 ||
out.rbegin()->second->dataPtr()->iColour()==PDT::Colour0) {
if(_hardtree) connectTrees(currentTree(),_hardtree,hard);
return;
}
// look up decay mode
tDMPtr dm;
string tag;
string inParticle = inter[0]->dataPtr()->name() + "->";
vector<string> outParticles;
outParticles.push_back(out.begin ()->first->progenitor()->dataPtr()->name());
outParticles.push_back(out.rbegin()->first->progenitor()->dataPtr()->name());
for (int it=0; it<2; ++it){
tag = inParticle + outParticles[it] + "," + outParticles[(it+1)%2] + ";";
dm = generator()->findDecayMode(tag);
if(dm) break;
}
// get the decayer
HwDecayerBasePtr decayer;
if(dm) decayer = dynamic_ptr_cast<HwDecayerBasePtr>(dm->decayer());
// check if decayer has a FSR POWHEG correction
if (!decayer || decayer->hasPOWHEGCorrection()<2){
if(_hardtree) connectTrees(currentTree(),_hardtree,hard);
return;
}
// generate the hardest emission
ShowerDecayMap decay;
PPtr in = new_ptr(*inter[0]);
ShowerTreePtr decayTree = new_ptr(ShowerTree(in, decay));
HardTreePtr FSRTree = decayer->generateHardest(decayTree);
if (!FSRTree) {
if(_hardtree) connectTrees(currentTree(),_hardtree,hard);
return;
}
// if there is no ISRTree make _hardtree from FSRTree
if (!ISRTree){
vector<HardBranchingPtr> inBranch,hardBranch;
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator
cit =currentTree()->incomingLines().begin();
cit!=currentTree()->incomingLines().end();++cit ) {
inBranch.push_back(new_ptr(HardBranching(cit->second,SudakovPtr(),
HardBranchingPtr(),
HardBranching::Incoming)));
inBranch.back()->beam(cit->first->original()->parents()[0]);
hardBranch.push_back(inBranch.back());
}
if(inBranch[0]->branchingParticle()->dataPtr()->coloured()) {
inBranch[0]->colourPartner(inBranch[1]);
inBranch[1]->colourPartner(inBranch[0]);
}
for(set<HardBranchingPtr>::iterator it=FSRTree->branchings().begin();
it!=FSRTree->branchings().end();++it) {
if((**it).branchingParticle()->id()!=in->id())
hardBranch.push_back(*it);
}
hardBranch[2]->colourPartner(hardBranch[3]);
hardBranch[3]->colourPartner(hardBranch[2]);
HardTreePtr newTree = new_ptr(HardTree(hardBranch,inBranch,
ShowerInteraction::QCD));
_hardtree = newTree;
}
// Otherwise modify the ISRTree to include the emission in FSRTree
else {
vector<tShowerParticlePtr> FSROut, ISROut;
set<HardBranchingPtr>::iterator itFSR, itISR;
// get outgoing particles
for(itFSR =FSRTree->branchings().begin();
itFSR!=FSRTree->branchings().end();++itFSR){
if ((**itFSR).status()==HardBranching::Outgoing)
FSROut.push_back((*itFSR)->branchingParticle());
}
for(itISR =ISRTree->branchings().begin();
itISR!=ISRTree->branchings().end();++itISR){
if ((**itISR).status()==HardBranching::Outgoing)
ISROut.push_back((*itISR)->branchingParticle());
}
// find COM frame formed by outgoing particles
LorentzRotation eventFrameFSR, eventFrameISR;
eventFrameFSR = ((FSROut[0]->momentum()+FSROut[1]->momentum()).findBoostToCM());
eventFrameISR = ((ISROut[0]->momentum()+ISROut[1]->momentum()).findBoostToCM());
// find rotation between ISR and FSR frames
int j=0;
if (ISROut[0]->id()!=FSROut[0]->id()) j=1;
eventFrameISR.rotateZ( (eventFrameFSR*FSROut[0]->momentum()).phi()-
(eventFrameISR*ISROut[j]->momentum()).phi() );
eventFrameISR.rotateY( (eventFrameFSR*FSROut[0]->momentum()).theta()-
(eventFrameISR*ISROut[j]->momentum()).theta() );
eventFrameISR.invert();
for (itFSR=FSRTree->branchings().begin();
itFSR!=FSRTree->branchings().end();++itFSR){
if ((**itFSR).branchingParticle()->id()==in->id()) continue;
for (itISR =ISRTree->branchings().begin();
itISR!=ISRTree->branchings().end();++itISR){
if ((**itISR).status()==HardBranching::Incoming) continue;
if ((**itFSR).branchingParticle()->id()==
(**itISR).branchingParticle()->id()){
// rotate FSRTree particle to ISRTree event frame
(**itISR).branchingParticle()->setMomentum(eventFrameISR*
eventFrameFSR*
(**itFSR).branchingParticle()->momentum());
(**itISR).branchingParticle()->rescaleMass();
// add the children of the FSRTree particles to the ISRTree
if(!(**itFSR).children().empty()){
(**itISR).addChild((**itFSR).children()[0]);
(**itISR).addChild((**itFSR).children()[1]);
// rotate momenta to ISRTree event frame
(**itISR).children()[0]->branchingParticle()->setMomentum(eventFrameISR*
eventFrameFSR*
(**itFSR).children()[0]->branchingParticle()->momentum());
(**itISR).children()[1]->branchingParticle()->setMomentum(eventFrameISR*
eventFrameFSR*
(**itFSR).children()[1]->branchingParticle()->momentum());
}
}
}
}
_hardtree = ISRTree;
}
}
if(_hardtree){
connectTrees(currentTree(),_hardtree,hard);
}
}
bool Evolver::truncatedTimeLikeShower(tShowerParticlePtr particle,
HardBranchingPtr branch,
ShowerInteraction::Type type,
Branching fb, bool first) {
// select a branching if we don't have one
if(!fb.kinematics)
fb = selectTimeLikeBranching(particle,type,branch);
// must be an emission, the forced one it not a truncated one
assert(fb.kinematics);
ShowerParticleVector children;
int ntry=0;
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
if(!fc[0].hard) fc[0] = Branching();
if(!fc[1].hard) fc[1] = Branching();
++ntry;
// Assign the shower kinematics to the emitting particle.
if(setupChildren) {
++_nFSR;
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// if not hard generate phi
if(!fb.hard)
fb.kinematics->phi(fb.sudakov->generatePhiForward(*particle,fb.ids,fb.kinematics));
// create the children
children = createTimeLikeChildren(particle,fb.ids);
// update the children
particle->showerKinematics()->
updateChildren(particle, children,fb.type,_reconOpt>=3);
setupChildren = false;
}
// select branchings for children
if(!fc[0].kinematics) {
// select branching for first particle
if(!fb.hard && fb.iout ==1 )
fc[0] = selectTimeLikeBranching(children[0],type,branch);
else if(fb.hard && !branch->children()[0]->children().empty() )
fc[0] = selectTimeLikeBranching(children[0],type,branch->children()[0]);
else
fc[0] = selectTimeLikeBranching(children[0],type,HardBranchingPtr());
}
// select branching for the second particle
if(!fc[1].kinematics) {
// select branching for first particle
if(!fb.hard && fb.iout ==2 )
fc[1] = selectTimeLikeBranching(children[1],type,branch);
else if(fb.hard && !branch->children()[1]->children().empty() )
fc[1] = selectTimeLikeBranching(children[1],type,branch->children()[1]);
else
fc[1] = selectTimeLikeBranching(children[1],type,HardBranchingPtr());
}
// old default
if(_reconOpt==0 || (_reconOpt==1 && fb.hard) ) {
// shower the first particle
if(fc[0].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 1)
truncatedTimeLikeShower(children[0],branch,type,fc[0],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 2)
truncatedTimeLikeShower(children[1],branch,type,fc[1],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[1]->children().empty() )
truncatedTimeLikeShower(children[1],branch->children()[1],type,fc[1],false);
else
timeLikeShower(children[1],type,fc[1],false);
}
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
break;
}
// H7 default
else if(_reconOpt==1) {
// shower the first particle
if(fc[0].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 1)
truncatedTimeLikeShower(children[0],branch,type,fc[0],false);
else
timeLikeShower(children[0],type,fc[0],false);
}
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 2)
truncatedTimeLikeShower(children[1],branch,type,fc[1],false);
else
timeLikeShower(children[1],type,fc[1],false);
}
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectTimeLikeBranching(particle,type,branch);
// must be at least hard emission
assert(fb.kinematics);
setupChildren = true;
continue;
}
else
break;
}
else if(_reconOpt>=2) {
// cut-off masses for the branching
const vector<Energy> & virtualMasses = fb.sudakov->virtualMasses(fb.ids);
// compute the masses of the children
Energy masses[3];
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics) {
const vector<Energy> & vm = fc[ix].sudakov->virtualMasses(fc[ix].ids);
Energy2 q2 =
fc[ix].kinematics->z()*(1.-fc[ix].kinematics->z())*sqr(fc[ix].kinematics->scale());
if(fc[ix].ids[0]!=ParticleID::g) q2 += sqr(vm[0]);
masses[ix+1] = sqrt(q2);
}
else {
masses[ix+1] = virtualMasses[ix+1];
}
}
masses[0] = fb.ids[0]!=ParticleID::g ? virtualMasses[0] : ZERO;
double z = fb.kinematics->z();
Energy2 pt2 = z*(1.-z)*(z*(1.-z)*sqr(fb.kinematics->scale()) + sqr(masses[0]))
- sqr(masses[1])*(1.-z) - sqr(masses[2])*z;
if(pt2>=ZERO) {
break;
}
// if only the hard emission have to accept it
else if ((fc[0].hard && !fc[1].kinematics) ||
(fc[1].hard && !fc[0].kinematics) ) {
break;
}
else {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].hard) continue;
if(fc[ix].kinematics && ! fc[ix].hard )
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
children[ix]->virtualMass(ZERO);
}
}
}
};
if(_reconOpt>=2) {
// shower the first particle
if(fc[0].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 1)
truncatedTimeLikeShower(children[0],branch,type,fc[0],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 2)
truncatedTimeLikeShower(children[1],branch,type,fc[1],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[1]->children().empty() )
truncatedTimeLikeShower(children[1],branch->children()[1],type,fc[1],false);
else
timeLikeShower(children[1],type,fc[1],false);
}
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
}
if(first&&!children.empty())
particle->showerKinematics()->resetChildren(particle,children);
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
bool Evolver::truncatedSpaceLikeShower(tShowerParticlePtr particle, PPtr beam,
HardBranchingPtr branch,
ShowerInteraction::Type type) {
tcPDFPtr pdf;
if(ShowerHandler::currentHandler()->firstPDF().particle() == beamParticle())
pdf = ShowerHandler::currentHandler()->firstPDF().pdf();
if(ShowerHandler::currentHandler()->secondPDF().particle() == beamParticle())
pdf = ShowerHandler::currentHandler()->secondPDF().pdf();
Energy freeze = ShowerHandler::currentHandler()->pdfFreezingScale();
Branching bb;
// parameters of the force branching
double z(0.);
HardBranchingPtr timelike;
for( unsigned int ix = 0; ix < branch->children().size(); ++ix ) {
if( branch->children()[ix]->status() ==HardBranching::Outgoing) {
timelike = branch->children()[ix];
}
if( branch->children()[ix]->status() ==HardBranching::Incoming )
z = branch->children()[ix]->z();
}
// generate truncated branching
tcPDPtr part[2];
if(z>=0.&&z<=1.) {
while (true) {
if( !isTruncatedShowerON() || hardOnly() ) break;
bb = splittingGenerator()->chooseBackwardBranching( *particle,
beam, 1., beamParticle(),
type , pdf,freeze);
if( !bb.kinematics || bb.kinematics->scale() < branch->scale() ) {
bb = Branching();
break;
}
// particles as in Sudakov form factor
part[0] = getParticleData( bb.ids[0] );
part[1] = getParticleData( bb.ids[2] );
//is emitter anti-particle
if( particle->id() != bb.ids[1]) {
if( part[0]->CC() ) part[0] = part[0]->CC();
if( part[1]->CC() ) part[1] = part[1]->CC();
}
double zsplit = bb.kinematics->z();
// apply the vetos for the truncated shower
// if doesn't carry most of momentum
ShowerInteraction::Type type2 = bb.type==ShowerPartnerType::QED ?
ShowerInteraction::QED : ShowerInteraction::QCD;
if(type2==branch->sudakov()->interactionType() &&
zsplit < 0.5) {
particle->vetoEmission(bb.type,bb.kinematics->scale());
continue;
}
// others
if( part[0]->id() != particle->id() || // if particle changes type
bb.kinematics->pT() > progenitor()->maximumpT(type2) || // pt veto
bb.kinematics->scale() < branch->scale()) { // angular ordering veto
particle->vetoEmission(bb.type,bb.kinematics->scale());
continue;
}
// and those from the base class
if(spaceLikeVetoed(bb,particle)) {
particle->vetoEmission(bb.type,bb.kinematics->scale());
continue;
}
break;
}
}
if( !bb.kinematics ) {
//do the hard emission
ShoKinPtr kinematics =
branch->sudakov()->createInitialStateBranching( branch->scale(), z, branch->phi(),
branch->children()[0]->pT() );
kinematics->initialize( *particle, beam );
// assign the splitting function and shower kinematics
particle->showerKinematics( kinematics );
if(kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(kinematics->pT());
// For the time being we are considering only 1->2 branching
// Now create the actual particles, make the otherChild a final state
// particle, while the newParent is not
ShowerParticlePtr newParent =
new_ptr( ShowerParticle( branch->branchingParticle()->dataPtr(), false ) );
ShowerParticlePtr otherChild =
new_ptr( ShowerParticle( timelike->branchingParticle()->dataPtr(),
true, true ) );
ShowerParticleVector theChildren;
theChildren.push_back( particle );
theChildren.push_back( otherChild );
particle->showerKinematics()->
updateParent( newParent, theChildren, branch->type());
// update the history if needed
currentTree()->updateInitialStateShowerProduct( progenitor(), newParent );
currentTree()->addInitialStateBranching( particle, newParent, otherChild );
// for the reconstruction of kinematics, parent/child
// relationships are according to the branching process:
// now continue the shower
bool emitted=false;
if(!hardOnly()) {
if( branch->parent() ) {
emitted = truncatedSpaceLikeShower( newParent, beam, branch->parent() , type);
}
else {
emitted = spaceLikeShower( newParent, beam , type);
}
}
if( !emitted ) {
if( intrinsicpT().find( progenitor() ) == intrinsicpT().end() ) {
kinematics->updateLast( newParent, ZERO, ZERO );
}
else {
pair<Energy,double> kt = intrinsicpT()[progenitor()];
kinematics->updateLast( newParent,
kt.first*cos( kt.second ),
kt.first*sin( kt.second ) );
}
}
particle->showerKinematics()->
updateChildren( newParent, theChildren,bb.type,false);
if(hardOnly()) return true;
// perform the shower of the final-state particle
if( timelike->children().empty() ) {
timeLikeShower( otherChild , type,Branching(),true);
}
else {
truncatedTimeLikeShower( otherChild, timelike , type,Branching(), true);
}
updateHistory(otherChild);
// return the emitted
return true;
}
// assign the splitting function and shower kinematics
particle->showerKinematics( bb.kinematics );
if(bb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(bb.kinematics->pT());
// For the time being we are considering only 1->2 branching
// Now create the actual particles, make the otherChild a final state
// particle, while the newParent is not
ShowerParticlePtr newParent = new_ptr( ShowerParticle( part[0], false ) );
ShowerParticlePtr otherChild = new_ptr( ShowerParticle( part[1], true, true ) );
ShowerParticleVector theChildren;
theChildren.push_back( particle );
theChildren.push_back( otherChild );
particle->showerKinematics()->
updateParent( newParent, theChildren, bb.type);
// update the history if needed
currentTree()->updateInitialStateShowerProduct( progenitor(), newParent );
currentTree()->addInitialStateBranching( particle, newParent, otherChild );
// for the reconstruction of kinematics, parent/child
// relationships are according to the branching process:
// now continue the shower
bool emitted = truncatedSpaceLikeShower( newParent, beam, branch,type);
// now reconstruct the momentum
if( !emitted ) {
if( intrinsicpT().find( progenitor() ) == intrinsicpT().end() ) {
bb.kinematics->updateLast( newParent, ZERO, ZERO );
}
else {
pair<Energy,double> kt = intrinsicpT()[ progenitor() ];
bb.kinematics->updateLast( newParent,
kt.first*cos( kt.second ),
kt.first*sin( kt.second ) );
}
}
particle->showerKinematics()->
updateChildren( newParent, theChildren, bb.type,false);
// perform the shower of the final-state particle
timeLikeShower( otherChild , type,Branching(),true);
updateHistory(otherChild);
// return the emitted
return true;
}
bool Evolver::
truncatedSpaceLikeDecayShower(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minmass, HardBranchingPtr branch,
ShowerInteraction::Type type, Branching fb) {
// select a branching if we don't have one
if(!fb.kinematics)
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,branch);
// must be an emission, the forced one it not a truncated one
assert(fb.kinematics);
ShowerParticleVector children;
int ntry=0;
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
if(!fc[0].hard) fc[0] = Branching();
if(!fc[1].hard) fc[1] = Branching();
++ntry;
if(setupChildren) {
++_nFSR;
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// create the ShowerParticle objects for the two children
children = createTimeLikeChildren(particle,fb.ids);
// updateChildren the children
particle->showerKinematics()->
updateChildren(particle, children, fb.type,_reconOpt>=3);
setupChildren = false;
}
// select branchings for children
if(!fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
// select branching for first particle
if(!fb.hard)
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,type,branch);
else if(fb.hard && ! branch->children()[0]->children().empty() )
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,type,
branch->children()[0]);
else
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,type,
HardBranchingPtr());
}
else {
// select branching for first particle
if(fb.hard && !branch->children()[0]->children().empty() )
fc[0] = selectTimeLikeBranching(children[0],type,branch->children()[0]);
else
fc[0] = selectTimeLikeBranching(children[0],type,HardBranchingPtr());
}
}
// select branching for the second particle
if(!fc[1].kinematics) {
if(children[1]->id()==particle->id()) {
// select branching for first particle
if(!fb.hard)
fc[1] = selectSpaceLikeDecayBranching(children[1],maxScales,minmass,type,branch);
else if(fb.hard && ! branch->children()[1]->children().empty() )
fc[1] = selectSpaceLikeDecayBranching(children[1],maxScales,minmass,type,
branch->children()[1]);
else
fc[1] = selectSpaceLikeDecayBranching(children[1],maxScales,minmass,type,
HardBranchingPtr());
}
else {
if(fb.hard && !branch->children()[1]->children().empty() )
fc[1] = selectTimeLikeBranching(children[1],type,branch->children()[1]);
else
fc[1] = selectTimeLikeBranching(children[1],type,HardBranchingPtr());
}
}
// old default
if(_reconOpt==0 || (_reconOpt==1 && fb.hard) ) {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),children[0]);
currentTree()->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[0]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[0]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[0]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
}
// shower the second particle
if(fc[1].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[1]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[1]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[1]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[1],false);
// normal shower
else
timeLikeShower(children[0],type,fc[1],false);
}
}
updateHistory(children[1]);
// branching has happened
break;
}
// H7 default
else if(_reconOpt==1) {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),children[0]);
currentTree()->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[0]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[0]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[0]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
}
// shower the second particle
if(fc[1].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[1]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[1]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[1]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[1],false);
// normal shower
else
timeLikeShower(children[0],type,fc[1],false);
}
}
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,branch);
// must be at least hard emission
assert(fb.kinematics);
setupChildren = true;
continue;
}
else {
updateHistory(children[1]);
break;
}
}
else if(_reconOpt>=2) {
// cut-off masses for the branching
const vector<Energy> & virtualMasses = fb.sudakov->virtualMasses(fb.ids);
// compute the masses of the children
Energy masses[3];
// space-like children
masses[1] = children[0]->virtualMass();
// time-like child
if(fc[1].kinematics) {
const vector<Energy> & vm = fc[1].sudakov->virtualMasses(fc[1].ids);
Energy2 q2 =
fc[1].kinematics->z()*(1.-fc[1].kinematics->z())*sqr(fc[1].kinematics->scale());
if(fc[1].ids[0]!=ParticleID::g) q2 += sqr(vm[0]);
masses[2] = sqrt(q2);
}
else {
masses[2] = virtualMasses[2];
}
masses[0]=particle->virtualMass();
double z = fb.kinematics->z();
Energy2 pt2 = (1.-z)*(z*sqr(masses[0])-sqr(masses[1])-z/(1.-z)*sqr(masses[2]));
if(pt2>=ZERO) {
break;
}
else {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics)
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else {
if(ix==0)
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,Constants::MaxEnergy);
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
}
}
children[0]->virtualMass(_progenitor->progenitor()->mass());
children[1]->virtualMass(ZERO);
}
}
};
if(_reconOpt>=2) {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),children[0]);
currentTree()->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[0]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[0]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[0]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
}
// shower the second particle
if(fc[1].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[1]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[1]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[1]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[1],false);
// normal shower
else
timeLikeShower(children[0],type,fc[1],false);
}
}
updateHistory(children[1]);
}
return true;
}
bool Evolver::constructDecayTree(vector<ShowerProgenitorPtr> & particlesToShower,
ShowerInteraction::Type inter) {
Energy ptmax(-GeV);
// get the maximum pt is all ready a hard tree
if(hardTree()) {
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
if(particlesToShower[ix]->maximumpT(inter)>ptmax&&
particlesToShower[ix]->progenitor()->isFinalState())
ptmax = particlesToShower[ix]->maximumpT(inter);
}
}
vector<HardBranchingPtr> spaceBranchings,allBranchings;
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
if(particlesToShower[ix]->progenitor()->isFinalState()) {
HardBranchingPtr newBranch;
if(particlesToShower[ix]->hasEmitted()) {
newBranch =
new_ptr(HardBranching(particlesToShower[ix]->progenitor(),
particlesToShower[ix]->progenitor()->
showerKinematics()->SudakovFormFactor(),
HardBranchingPtr(),HardBranching::Outgoing));
constructTimeLikeLine(newBranch,particlesToShower[ix]->progenitor());
}
else {
newBranch =
new_ptr(HardBranching(particlesToShower[ix]->progenitor(),
SudakovPtr(),HardBranchingPtr(),
HardBranching::Outgoing));
}
allBranchings.push_back(newBranch);
}
else {
HardBranchingPtr newBranch;
if(particlesToShower[ix]->hasEmitted()) {
newBranch =
new_ptr(HardBranching(particlesToShower[ix]->progenitor(),
particlesToShower[ix]->progenitor()->
showerKinematics()->SudakovFormFactor(),
HardBranchingPtr(),HardBranching::Decay));
constructTimeLikeLine(newBranch,particlesToShower[ix]->progenitor());
HardBranchingPtr last=newBranch;
do {
for(unsigned int ix=0;ix<last->children().size();++ix) {
if(last->children()[ix]->branchingParticle()->id()==
particlesToShower[ix]->id()) {
last = last->children()[ix];
continue;
}
}
}
while(!last->children().empty());
last->status(HardBranching::Incoming);
spaceBranchings.push_back(newBranch);
allBranchings .push_back(last);
}
else {
newBranch =
new_ptr(HardBranching(particlesToShower[ix]->progenitor(),
SudakovPtr(),HardBranchingPtr(),
HardBranching::Incoming));
spaceBranchings.push_back(newBranch);
allBranchings .push_back(newBranch);
}
}
}
HardTreePtr QCDTree = new_ptr(HardTree(allBranchings,spaceBranchings,inter));
// set the charge partners
ShowerParticleVector particles;
particles.push_back(spaceBranchings.back()->branchingParticle());
for(set<HardBranchingPtr>::iterator cit=QCDTree->branchings().begin();
cit!=QCDTree->branchings().end();++cit) {
if((*cit)->status()==HardBranching::Outgoing)
particles.push_back((*cit)->branchingParticle());
}
// get the partners
showerModel()->partnerFinder()->setInitialEvolutionScales(particles,true,inter,true);
// do the inverse recon
if(!showerModel()->kinematicsReconstructor()->
deconstructDecayJets(QCDTree,this,inter)) {
return false;
}
// clear the old shower
currentTree()->clear();
// set the hard tree
hardTree(QCDTree);
// set the charge partners
setEvolutionPartners(false,inter,false);
// get the particles to be showered
map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator cit;
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator cjt;
particlesToShower.clear();
// incoming particles
for(cit=currentTree()->incomingLines().begin();
cit!=currentTree()->incomingLines().end();++cit)
particlesToShower.push_back(((*cit).first));
assert(particlesToShower.size()==1);
// outgoing particles
for(cjt=currentTree()->outgoingLines().begin();
cjt!=currentTree()->outgoingLines().end();++cjt) {
particlesToShower.push_back(((*cjt).first));
if(ptmax>ZERO) particlesToShower.back()->maximumpT(ptmax,inter);
}
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit=hardTree()->particles().end(),
mit = hardTree()->particles().find(particlesToShower[ix]->progenitor());
if( mit != eit) {
if(mit->second->status()==HardBranching::Outgoing)
particlesToShower[ix]->progenitor()->set5Momentum(mit->second->pVector());
}
}
return true;
}
bool Evolver::constructHardTree(vector<ShowerProgenitorPtr> & particlesToShower,
ShowerInteraction::Type inter) {
bool noEmission = true;
vector<HardBranchingPtr> spaceBranchings,allBranchings;
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
if(particlesToShower[ix]->progenitor()->isFinalState()) {
HardBranchingPtr newBranch;
if(particlesToShower[ix]->hasEmitted()) {
noEmission = false;
newBranch =
new_ptr(HardBranching(particlesToShower[ix]->progenitor(),
particlesToShower[ix]->progenitor()->
showerKinematics()->SudakovFormFactor(),
HardBranchingPtr(),HardBranching::Outgoing));
constructTimeLikeLine(newBranch,particlesToShower[ix]->progenitor());
}
else {
newBranch =
new_ptr(HardBranching(particlesToShower[ix]->progenitor(),
SudakovPtr(),HardBranchingPtr(),
HardBranching::Outgoing));
}
allBranchings.push_back(newBranch);
}
else {
HardBranchingPtr first,last;
if(!particlesToShower[ix]->progenitor()->parents().empty()) {
noEmission = false;
constructSpaceLikeLine(particlesToShower[ix]->progenitor(),
first,last,SudakovPtr(),
particlesToShower[ix]->original()->parents()[0]);
}
else {
first = new_ptr(HardBranching(particlesToShower[ix]->progenitor(),
SudakovPtr(),HardBranchingPtr(),
HardBranching::Incoming));
if(particlesToShower[ix]->original()->parents().empty())
first->beam(particlesToShower[ix]->original());
else
first->beam(particlesToShower[ix]->original()->parents()[0]);
last = first;
}
spaceBranchings.push_back(first);
allBranchings.push_back(last);
}
}
if(!noEmission) {
HardTreePtr QCDTree = new_ptr(HardTree(allBranchings,spaceBranchings,
inter));
// set the charge partners
ShowerParticleVector particles;
for(set<HardBranchingPtr>::iterator cit=QCDTree->branchings().begin();
cit!=QCDTree->branchings().end();++cit) {
particles.push_back((*cit)->branchingParticle());
}
// get the partners
showerModel()->partnerFinder()->setInitialEvolutionScales(particles,false,
inter,true);
// do the inverse recon
if(!showerModel()->kinematicsReconstructor()->
deconstructHardJets(QCDTree,this,inter))
throw Exception() << "Can't to shower deconstruction for QED shower in"
<< "QEDEvolver::showerHard" << Exception::eventerror;
// set the hard tree
hardTree(QCDTree);
}
// clear the old shower
currentTree()->clear();
// set the charge partners
setEvolutionPartners(true,inter,false);
// get the particles to be showered
particlesToShower = currentTree()->extractProgenitors();
// reset momenta
if(hardTree()) {
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit=hardTree()->particles().end(),
mit = hardTree()->particles().find(particlesToShower[ix]->progenitor());
if( mit != eit) {
particlesToShower[ix]->progenitor()->set5Momentum(mit->second->showerMomentum());
}
}
}
return true;
}
void Evolver::constructTimeLikeLine(tHardBranchingPtr branch,
tShowerParticlePtr particle) {
for(unsigned int ix=0;ix<particle->children().size();++ix) {
HardBranching::Status status = branch->status();
tShowerParticlePtr child =
dynamic_ptr_cast<ShowerParticlePtr>(particle->children()[ix]);
if(child->children().empty()) {
HardBranchingPtr newBranch =
new_ptr(HardBranching(child,SudakovPtr(),branch,status));
branch->addChild(newBranch);
}
else {
HardBranchingPtr newBranch =
new_ptr(HardBranching(child,child->showerKinematics()->SudakovFormFactor(),
branch,status));
constructTimeLikeLine(newBranch,child);
branch->addChild(newBranch);
}
}
// sort out the type of interaction
if(!branch->children().empty()) {
if(branch->branchingParticle()->id()==ParticleID::gamma ||
branch->children()[0]->branchingParticle()->id()==ParticleID::gamma ||
branch->children()[1]->branchingParticle()->id()==ParticleID::gamma)
branch->type(ShowerPartnerType::QED);
else {
if(branch->branchingParticle()->id()==
branch->children()[0]->branchingParticle()->id()) {
if(branch->branchingParticle()->dataPtr()->iColour()==PDT::Colour8) {
tShowerParticlePtr emittor =
branch->branchingParticle()->showerKinematics()->z()>0.5 ?
branch->children()[0]->branchingParticle() :
branch->children()[1]->branchingParticle();
if(branch->branchingParticle()->colourLine()==emittor->colourLine())
branch->type(ShowerPartnerType::QCDAntiColourLine);
else if(branch->branchingParticle()->antiColourLine()==emittor->antiColourLine())
branch->type(ShowerPartnerType::QCDColourLine);
else
assert(false);
}
else if(branch->branchingParticle()->colourLine()) {
branch->type(ShowerPartnerType::QCDColourLine);
}
else if(branch->branchingParticle()->antiColourLine()) {
branch->type(ShowerPartnerType::QCDAntiColourLine);
}
else
assert(false);
}
else if(branch->branchingParticle()->id()==ParticleID::g &&
branch->children()[0]->branchingParticle()->id()==
-branch->children()[1]->branchingParticle()->id()) {
if(branch->branchingParticle()->showerKinematics()->z()>0.5)
branch->type(ShowerPartnerType::QCDAntiColourLine);
else
branch->type(ShowerPartnerType::QCDColourLine);
}
else
assert(false);
}
}
}
void Evolver::constructSpaceLikeLine(tShowerParticlePtr particle,
HardBranchingPtr & first,
HardBranchingPtr & last,
SudakovPtr sud,PPtr beam) {
if(!particle) return;
if(!particle->parents().empty()) {
tShowerParticlePtr parent =
dynamic_ptr_cast<ShowerParticlePtr>(particle->parents()[0]);
SudakovPtr newSud=particle->showerKinematics()->SudakovFormFactor();
constructSpaceLikeLine(parent,first,last,newSud,beam);
}
HardBranchingPtr newBranch =
new_ptr(HardBranching(particle,sud,last,HardBranching::Incoming));
newBranch->beam(beam);
if(!first) {
first=newBranch;
last =newBranch;
return;
}
last->addChild(newBranch);
tShowerParticlePtr timeChild =
dynamic_ptr_cast<ShowerParticlePtr>(particle->parents()[0]->children()[1]);
HardBranchingPtr timeBranch;
if(!timeChild->children().empty()) {
timeBranch =
new_ptr(HardBranching(timeChild,
timeChild->showerKinematics()->SudakovFormFactor(),
last,HardBranching::Outgoing));
constructTimeLikeLine(timeBranch,timeChild);
}
else {
timeBranch =
new_ptr(HardBranching(timeChild,SudakovPtr(),last,HardBranching::Outgoing));
}
last->addChild(timeBranch);
// sort out the type
if(last->branchingParticle() ->id() == ParticleID::gamma ||
newBranch->branchingParticle() ->id() == ParticleID::gamma ||
timeBranch->branchingParticle()->id() == ParticleID::gamma) {
last->type(ShowerPartnerType::QED);
}
else if(last->branchingParticle()->id()==newBranch->branchingParticle()->id()) {
if(last->branchingParticle()->id()==ParticleID::g) {
if(last->branchingParticle()->colourLine()==
newBranch->branchingParticle()->colourLine()) {
last->type(ShowerPartnerType::QCDAntiColourLine);
}
else {
last->type(ShowerPartnerType::QCDColourLine);
}
}
else if(last->branchingParticle()->hasColour()) {
last->type(ShowerPartnerType::QCDColourLine);
}
else if(last->branchingParticle()->hasAntiColour()) {
last->type(ShowerPartnerType::QCDAntiColourLine);
}
else
assert(false);
}
else if(newBranch->branchingParticle()->id()==ParticleID::g) {
if(last->branchingParticle()->hasColour()) {
last->type(ShowerPartnerType::QCDAntiColourLine);
}
else if(last->branchingParticle()->hasAntiColour()) {
last->type(ShowerPartnerType::QCDColourLine);
}
else
assert(false);
}
else if(newBranch->branchingParticle()->hasColour()) {
last->type(ShowerPartnerType::QCDColourLine);
}
else if(newBranch->branchingParticle()->hasAntiColour()) {
last->type(ShowerPartnerType::QCDAntiColourLine);
}
else {
assert(false);
}
last=newBranch;
}
void Evolver::connectTrees(ShowerTreePtr showerTree,
HardTreePtr hardTree, bool hard ) {
ShowerParticleVector particles;
// find the Sudakovs
for(set<HardBranchingPtr>::iterator cit=hardTree->branchings().begin();
cit!=hardTree->branchings().end();++cit) {
// Sudakovs for ISR
if((**cit).parent()&&(**cit).status()==HardBranching::Incoming) {
++_nis;
IdList br(3);
br[0] = (**cit).parent()->branchingParticle()->id();
br[1] = (**cit). branchingParticle()->id();
br[2] = (**cit).parent()->children()[0]==*cit ?
(**cit).parent()->children()[1]->branchingParticle()->id() :
(**cit).parent()->children()[0]->branchingParticle()->id();
BranchingList branchings = splittingGenerator()->initialStateBranchings();
if(br[1]<0&&br[0]==br[1]) {
br[0] = abs(br[0]);
br[1] = abs(br[1]);
}
else if(br[1]<0) {
br[1] = -br[1];
br[2] = -br[2];
}
long index = abs(br[1]);
SudakovPtr sudakov;
for(BranchingList::const_iterator cjt = branchings.lower_bound(index);
cjt != branchings.upper_bound(index); ++cjt ) {
IdList ids = cjt->second.second;
if(ids[0]==br[0]&&ids[1]==br[1]&&ids[2]==br[2]) {
sudakov=cjt->second.first;
break;
}
}
if(!sudakov) throw Exception() << "Can't find Sudakov for the hard emission in "
<< "Evolver::connectTrees() for ISR"
<< Exception::runerror;
(**cit).parent()->sudakov(sudakov);
}
// Sudakovs for FSR
else if(!(**cit).children().empty()) {
++_nfs;
IdList br(3);
br[0] = (**cit) .branchingParticle()->id();
br[1] = (**cit).children()[0]->branchingParticle()->id();
br[2] = (**cit).children()[1]->branchingParticle()->id();
BranchingList branchings = splittingGenerator()->finalStateBranchings();
if(br[0]<0) {
br[0] = abs(br[0]);
br[1] = abs(br[1]);
br[2] = abs(br[2]);
}
long index = br[0];
SudakovPtr sudakov;
for(BranchingList::const_iterator cjt = branchings.lower_bound(index);
cjt != branchings.upper_bound(index); ++cjt ) {
IdList ids = cjt->second.second;
if(ids[0]==br[0]&&ids[1]==br[1]&&ids[2]==br[2]) {
sudakov=cjt->second.first;
break;
}
}
if(!sudakov) throw Exception() << "Can't find Sudakov for the hard emission in "
<< "Evolver::connectTrees()"
<< Exception::runerror;
(**cit).sudakov(sudakov);
}
}
// calculate the evolution scale
for(set<HardBranchingPtr>::iterator cit=hardTree->branchings().begin();
cit!=hardTree->branchings().end();++cit) {
particles.push_back((*cit)->branchingParticle());
}
showerModel()->partnerFinder()->
setInitialEvolutionScales(particles,!hard,hardTree->interaction(),
!hardTree->partnersSet());
hardTree->partnersSet(true);
// inverse reconstruction
if(hard) {
showerModel()->kinematicsReconstructor()->
deconstructHardJets(hardTree,ShowerHandler::currentHandler()->evolver(),
hardTree->interaction());
}
else
showerModel()->kinematicsReconstructor()->
deconstructDecayJets(hardTree,ShowerHandler::currentHandler()->evolver(),
hardTree->interaction());
// now reset the momenta of the showering particles
vector<ShowerProgenitorPtr> particlesToShower;
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator
cit=showerTree->incomingLines().begin();
cit!=showerTree->incomingLines().end();++cit )
particlesToShower.push_back(cit->first);
// extract the showering particles
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
cit=showerTree->outgoingLines().begin();
cit!=showerTree->outgoingLines().end();++cit )
particlesToShower.push_back(cit->first);
// match them
map<ShowerProgenitorPtr,HardBranchingPtr> partners;
for(set<HardBranchingPtr>::const_iterator bit=hardTree->branchings().begin();
bit!=hardTree->branchings().end();++bit) {
Energy2 dmin( 1e30*GeV2 );
ShowerProgenitorPtr partner;
for(vector<ShowerProgenitorPtr>::const_iterator pit=particlesToShower.begin();
pit!=particlesToShower.end();++pit) {
if(partners.find(*pit)!=partners.end()) continue;
if( (**bit).branchingParticle()->id() != (**pit).progenitor()->id() ) continue;
if( (**bit).branchingParticle()->isFinalState() !=
(**pit).progenitor()->isFinalState() ) continue;
if( (**pit).progenitor()->isFinalState() ) {
Energy2 dtest =
sqr( (**pit).progenitor()->momentum().x() - (**bit).showerMomentum().x() ) +
sqr( (**pit).progenitor()->momentum().y() - (**bit).showerMomentum().y() ) +
sqr( (**pit).progenitor()->momentum().z() - (**bit).showerMomentum().z() ) +
sqr( (**pit).progenitor()->momentum().t() - (**bit).showerMomentum().t() );
// add mass difference for identical particles (e.g. Z0 Z0 production)
dtest += 1e10*sqr((**pit).progenitor()->momentum().m()-(**bit).showerMomentum().m());
if( dtest < dmin ) {
partner = *pit;
dmin = dtest;
}
}
else {
// ensure directions are right
if((**pit).progenitor()->momentum().z()/(**bit).showerMomentum().z()>ZERO) {
partner = *pit;
break;
}
}
}
if(!partner) throw Exception() << "Failed to match shower and hard trees in Evolver::hardestEmission"
<< Exception::eventerror;
partners[partner] = *bit;
}
for(vector<ShowerProgenitorPtr>::const_iterator pit=particlesToShower.begin();
pit!=particlesToShower.end();++pit) {
HardBranchingPtr partner = partners[*pit];
if((**pit).progenitor()->dataPtr()->stable()) {
(**pit).progenitor()->set5Momentum(partner->showerMomentum());
(**pit).copy()->set5Momentum(partner->showerMomentum());
}
else {
Lorentz5Momentum oldMomentum = (**pit).progenitor()->momentum();
Lorentz5Momentum newMomentum = partner->showerMomentum();
LorentzRotation boost( oldMomentum.findBoostToCM(),oldMomentum.e()/oldMomentum.mass());
(**pit).progenitor()->transform(boost);
(**pit).copy() ->transform(boost);
boost = LorentzRotation(-newMomentum.findBoostToCM(),newMomentum.e()/newMomentum.mass());
(**pit).progenitor()->transform(boost);
(**pit).copy() ->transform(boost);
}
}
// correction boosts for daughter trees
for(map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator
tit = showerTree->treelinks().begin();
tit != showerTree->treelinks().end();++tit) {
ShowerTreePtr decayTree = tit->first;
map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator
cit = decayTree->incomingLines().begin();
// reset the momentum of the decay particle
Lorentz5Momentum oldMomentum = cit->first->progenitor()->momentum();
Lorentz5Momentum newMomentum = tit->second.second->momentum();
LorentzRotation boost( oldMomentum.findBoostToCM(),oldMomentum.e()/oldMomentum.mass());
decayTree->transform(boost,true);
boost = LorentzRotation(-newMomentum.findBoostToCM(),newMomentum.e()/newMomentum.mass());
decayTree->transform(boost,true);
}
}
void Evolver::doShowering(bool hard,XCPtr xcomb) {
// order of the interactions
bool showerOrder(true);
// zero number of emissions
_nis = _nfs = 0;
// if MC@NLO H event and limited emissions
// indicate both final and initial state emission
if ( isMCatNLOHEvent && _limitEmissions != 0 ) {
_nis = _nfs = 1;
}
// extract particles to shower
vector<ShowerProgenitorPtr> particlesToShower(setupShower(hard));
// setup the maximum scales for the shower
if (hardVetoOn()) setupMaximumScales(particlesToShower,xcomb);
// set the hard scales for the profiles
setupHardScales(particlesToShower,xcomb);
// specific stuff for hard processes and decays
Energy minmass(ZERO), mIn(ZERO);
// hard process generate the intrinsic p_T once and for all
if(hard) {
generateIntrinsicpT(particlesToShower);
}
// decay compute the minimum mass of the final-state
else {
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
if(particlesToShower[ix]->progenitor()->isFinalState()) {
if(particlesToShower[ix]->progenitor()->dataPtr()->stable())
minmass += particlesToShower[ix]->progenitor()->dataPtr()->constituentMass();
else
minmass += particlesToShower[ix]->progenitor()->mass();
}
else {
mIn = particlesToShower[ix]->progenitor()->mass();
}
}
// throw exception if decay can't happen
if ( minmass > mIn ) {
throw Exception() << "Evolver.cc: Mass of decaying particle is "
<< "below constituent masses of decay products."
<< Exception::eventerror;
}
}
// check if interactions in right order
if(hardTree() && interaction_!=4 &&
hardTree()->interaction()!=interactions_[0]) {
assert(interactions_.size()==2);
showerOrder = false;
swap(interactions_[0],interactions_[1]);
}
// loop over possible interactions
for(unsigned int inter=0;inter<interactions_.size();++inter) {
// set up for second pass if required
if(inter!=0) {
// zero intrinsic pt so only added first time round
intrinsicpT().clear();
// construct the tree and throw veto if not possible
if(!(hard ?
constructHardTree (particlesToShower,interactions_[inter]) :
constructDecayTree(particlesToShower,interactions_[inter])))
throw InteractionVeto();
}
// create random particle vector (only need to do once)
vector<ShowerProgenitorPtr> tmp;
unsigned int nColouredIncoming = 0;
while(particlesToShower.size()>0){
unsigned int xx=UseRandom::irnd(particlesToShower.size());
tmp.push_back(particlesToShower[xx]);
particlesToShower.erase(particlesToShower.begin()+xx);
}
particlesToShower=tmp;
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
if(!particlesToShower[ix]->progenitor()->isFinalState() &&
particlesToShower[ix]->progenitor()->coloured()) ++nColouredIncoming;
}
bool switchRecon = hard && nColouredIncoming !=1;
// main shower loop
unsigned int ntry(0);
bool reconstructed = false;
do {
// clear results of last attempt if needed
if(ntry!=0) {
currentTree()->clear();
setEvolutionPartners(hard,interactions_[inter],true);
_nis = _nfs = 0;
// if MC@NLO H event and limited emissions
// indicate both final and initial state emission
if ( isMCatNLOHEvent && _limitEmissions != 0 ) {
_nis = _nfs = 1;
}
for(unsigned int ix=0; ix<particlesToShower.size();++ix) {
SpinPtr spin = particlesToShower[ix]->progenitor()->spinInfo();
if(spin && spin->decayVertex() &&
dynamic_ptr_cast<tcSVertexPtr>(spin->decayVertex())) {
spin->decayVertex(VertexPtr());
}
}
}
// loop over particles
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
// extract the progenitor
progenitor(particlesToShower[ix]);
// final-state radiation
if(progenitor()->progenitor()->isFinalState()) {
if(!isFSRadiationON()) continue;
// perform shower
progenitor()->hasEmitted(startTimeLikeShower(interactions_[inter]));
}
// initial-state radiation
else {
if(!isISRadiationON()) continue;
// hard process
if(hard) {
// get the PDF
setBeamParticle(_progenitor->beam());
assert(beamParticle());
// perform the shower
// set the beam particle
tPPtr beamparticle=progenitor()->original();
if(!beamparticle->parents().empty())
beamparticle=beamparticle->parents()[0];
// generate the shower
progenitor()->hasEmitted(startSpaceLikeShower(beamparticle,
interactions_[inter]));
}
// decay
else {
// skip colour and electrically neutral particles
if(!progenitor()->progenitor()->dataPtr()->coloured() &&
!progenitor()->progenitor()->dataPtr()->charged()) {
progenitor()->hasEmitted(false);
continue;
}
// perform shower
// set the scales correctly. The current scale is the maximum scale for
// emission not the starting scale
ShowerParticle::EvolutionScales maxScales(progenitor()->progenitor()->scales());
progenitor()->progenitor()->scales() = ShowerParticle::EvolutionScales();
if(progenitor()->progenitor()->dataPtr()->charged()) {
progenitor()->progenitor()->scales().QED = progenitor()->progenitor()->mass();
progenitor()->progenitor()->scales().QED_noAO = progenitor()->progenitor()->mass();
}
if(progenitor()->progenitor()->hasColour()) {
progenitor()->progenitor()->scales().QCD_c = progenitor()->progenitor()->mass();
progenitor()->progenitor()->scales().QCD_c_noAO = progenitor()->progenitor()->mass();
}
if(progenitor()->progenitor()->hasAntiColour()) {
progenitor()->progenitor()->scales().QCD_ac = progenitor()->progenitor()->mass();
progenitor()->progenitor()->scales().QCD_ac_noAO = progenitor()->progenitor()->mass();
}
// perform the shower
progenitor()->hasEmitted(startSpaceLikeDecayShower(maxScales,minmass,
interactions_[inter]));
}
}
}
// do the kinematic reconstruction, checking if it worked
reconstructed = hard ?
showerModel()->kinematicsReconstructor()->
reconstructHardJets (currentTree(),intrinsicpT(),interactions_[inter],
switchRecon && ntry>maximumTries()/2) :
showerModel()->kinematicsReconstructor()->
reconstructDecayJets(currentTree(),interactions_[inter]);
}
while(!reconstructed&&maximumTries()>++ntry);
// check if failed to generate the shower
if(ntry==maximumTries()) {
if(hard)
throw ShowerHandler::ShowerTriesVeto(ntry);
else
throw Exception() << "Failed to generate the shower after "
<< ntry << " attempts in Evolver::showerDecay()"
<< Exception::eventerror;
}
}
// tree has now showered
_currenttree->hasShowered(true);
if(!showerOrder) swap(interactions_[0],interactions_[1]);
hardTree(HardTreePtr());
}
void Evolver:: convertHardTree(bool hard,ShowerInteraction::Type type) {
map<ColinePtr,ColinePtr> cmap;
// incoming particles
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator
cit=currentTree()->incomingLines().begin();cit!=currentTree()->incomingLines().end();++cit) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
mit = hardTree()->particles().find(cit->first->progenitor());
// put the colour lines in the map
ShowerParticlePtr oldParticle = cit->first->progenitor();
ShowerParticlePtr newParticle = mit->second->branchingParticle();
ColinePtr cLine = oldParticle-> colourLine();
ColinePtr aLine = oldParticle->antiColourLine();
if(newParticle->colourLine() &&
cmap.find(newParticle-> colourLine())==cmap.end())
cmap[newParticle-> colourLine()] = cLine;
if(newParticle->antiColourLine() &&
cmap.find(newParticle->antiColourLine())==cmap.end())
cmap[newParticle->antiColourLine()] = aLine;
// check whether or not particle emits
bool emission = mit->second->parent();
if(emission) {
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
}
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
}
newParticle = mit->second->parent()->branchingParticle();
}
// get the new colour lines
ColinePtr newCLine,newALine;
// sort out colour lines
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newCLine = cmap[ctemp];
}
else {
newCLine = new_ptr(ColourLine());
cmap[ctemp] = newCLine;
}
}
// and anticolour lines
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newALine = cmap[ctemp];
}
else {
newALine = new_ptr(ColourLine());
cmap[ctemp] = newALine;
}
}
// remove colour lines from old particle
if(aLine) {
aLine->removeAntiColoured(cit->first->copy());
aLine->removeAntiColoured(cit->first->progenitor());
}
if(cLine) {
cLine->removeColoured(cit->first->copy());
cLine->removeColoured(cit->first->progenitor());
}
// add particle to colour lines
if(newCLine) newCLine->addColoured (newParticle);
if(newALine) newALine->addAntiColoured(newParticle);
// insert new particles
cit->first->copy(newParticle);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*newParticle,1,false)));
cit->first->progenitor(sp);
currentTree()->incomingLines()[cit->first]=sp;
cit->first->perturbative(!emission);
// and the emitted particle if needed
if(emission) {
ShowerParticlePtr newOut = mit->second->parent()->children()[1]->branchingParticle();
if(newOut->colourLine()) {
ColinePtr ctemp = newOut-> colourLine();
ctemp->removeColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addColoured (newOut);
}
if(newOut->antiColourLine()) {
ColinePtr ctemp = newOut->antiColourLine();
ctemp->removeAntiColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addAntiColoured(newOut);
}
ShowerParticlePtr sout=new_ptr(ShowerParticle(*newOut,1,true));
ShowerProgenitorPtr out=new_ptr(ShowerProgenitor(cit->first->original(),newOut,sout));
out->perturbative(false);
currentTree()->outgoingLines().insert(make_pair(out,sout));
}
if(hard) {
// sort out the value of x
if(mit->second->beam()->momentum().z()>ZERO) {
sp->x(newParticle->momentum(). plus()/mit->second->beam()->momentum(). plus());
}
else {
sp->x(newParticle->momentum().minus()/mit->second->beam()->momentum().minus());
}
}
}
// outgoing particles
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
cit=currentTree()->outgoingLines().begin();cit!=currentTree()->outgoingLines().end();++cit) {
map<tShowerTreePtr,pair<tShowerProgenitorPtr,
tShowerParticlePtr> >::const_iterator tit;
for(tit = currentTree()->treelinks().begin();
tit != currentTree()->treelinks().end();++tit) {
if(tit->second.first && tit->second.second==cit->first->progenitor())
break;
}
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
mit = hardTree()->particles().find(cit->first->progenitor());
if(mit==hardTree()->particles().end()) continue;
// put the colour lines in the map
ShowerParticlePtr oldParticle = cit->first->progenitor();
ShowerParticlePtr newParticle = mit->second->branchingParticle();
ShowerParticlePtr newOut;
ColinePtr cLine = oldParticle-> colourLine();
ColinePtr aLine = oldParticle->antiColourLine();
if(newParticle->colourLine() &&
cmap.find(newParticle-> colourLine())==cmap.end())
cmap[newParticle-> colourLine()] = cLine;
if(newParticle->antiColourLine() &&
cmap.find(newParticle->antiColourLine())==cmap.end())
cmap[newParticle->antiColourLine()] = aLine;
// check whether or not particle emits
bool emission = !mit->second->children().empty();
if(emission) {
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
}
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
}
newParticle = mit->second->children()[0]->branchingParticle();
newOut = mit->second->children()[1]->branchingParticle();
if(newParticle->id()!=oldParticle->id()&&newParticle->id()==newOut->id())
swap(newParticle,newOut);
}
// get the new colour lines
ColinePtr newCLine,newALine;
// sort out colour lines
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newCLine = cmap[ctemp];
}
else {
newCLine = new_ptr(ColourLine());
cmap[ctemp] = newCLine;
}
}
// and anticolour lines
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newALine = cmap[ctemp];
}
else {
newALine = new_ptr(ColourLine());
cmap[ctemp] = newALine;
}
}
// remove colour lines from old particle
if(aLine) {
aLine->removeAntiColoured(cit->first->copy());
aLine->removeAntiColoured(cit->first->progenitor());
}
if(cLine) {
cLine->removeColoured(cit->first->copy());
cLine->removeColoured(cit->first->progenitor());
}
// special for unstable particles
if(newParticle->id()==oldParticle->id() &&
(tit!=currentTree()->treelinks().end()||!oldParticle->dataPtr()->stable())) {
Lorentz5Momentum oldMomentum = oldParticle->momentum();
Lorentz5Momentum newMomentum = newParticle->momentum();
LorentzRotation boost( oldMomentum.findBoostToCM(),oldMomentum.e()/oldMomentum.mass());
if(tit!=currentTree()->treelinks().end()) tit->first->transform(boost,false);
oldParticle->transform(boost);
boost = LorentzRotation(-newMomentum.findBoostToCM(),newMomentum.e()/newMomentum.mass());
oldParticle->transform(boost);
if(tit!=currentTree()->treelinks().end()) tit->first->transform(boost,false);
newParticle=oldParticle;
}
// add particle to colour lines
if(newCLine) newCLine->addColoured (newParticle);
if(newALine) newALine->addAntiColoured(newParticle);
// insert new particles
cit->first->copy(newParticle);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*newParticle,1,true)));
cit->first->progenitor(sp);
currentTree()->outgoingLines()[cit->first]=sp;
cit->first->perturbative(!emission);
// and the emitted particle if needed
if(emission) {
if(newOut->colourLine()) {
ColinePtr ctemp = newOut-> colourLine();
ctemp->removeColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addColoured (newOut);
}
if(newOut->antiColourLine()) {
ColinePtr ctemp = newOut->antiColourLine();
ctemp->removeAntiColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addAntiColoured(newOut);
}
ShowerParticlePtr sout=new_ptr(ShowerParticle(*newOut,1,true));
ShowerProgenitorPtr out=new_ptr(ShowerProgenitor(cit->first->original(),newOut,sout));
out->perturbative(false);
currentTree()->outgoingLines().insert(make_pair(out,sout));
}
// update any decay products
if(tit!=currentTree()->treelinks().end())
currentTree()->updateLink(tit->first,make_pair(cit->first,sp));
}
// reset the tree
currentTree()->resetShowerProducts();
// reextract the particles and set the colour partners
vector<ShowerParticlePtr> particles =
currentTree()->extractProgenitorParticles();
// clear the partners
for(unsigned int ix=0;ix<particles.size();++ix) {
particles[ix]->partner(ShowerParticlePtr());
particles[ix]->clearPartners();
}
// clear the tree
hardTree(HardTreePtr());
// Set the initial evolution scales
showerModel()->partnerFinder()->
setInitialEvolutionScales(particles,!hard,type,!_hardtree);
}
Branching Evolver::selectTimeLikeBranching(tShowerParticlePtr particle,
ShowerInteraction::Type type,
HardBranchingPtr branch) {
Branching fb;
unsigned int iout=0;
tcPDPtr pdata[2];
while (true) {
// break if doing truncated shower and no truncated shower needed
if(branch && (!isTruncatedShowerON()||hardOnly())) break;
fb=_splittingGenerator->chooseForwardBranching(*particle,_finalenhance,type);
// no emission break
if(!fb.kinematics) break;
// special for truncated shower
if(branch) {
// check haven't evolved too far
if(fb.kinematics->scale() < branch->scale()) {
fb=Branching();
break;
}
// get the particle data objects
for(unsigned int ix=0;ix<2;++ix) pdata[ix]=getParticleData(fb.ids[ix+1]);
if(particle->id()!=fb.ids[0]) {
for(unsigned int ix=0;ix<2;++ix) {
tPDPtr cc(pdata[ix]->CC());
if(cc) pdata[ix]=cc;
}
}
// find the truncated line
iout=0;
if(pdata[0]->id()!=pdata[1]->id()) {
if(pdata[0]->id()==particle->id()) iout=1;
else if (pdata[1]->id()==particle->id()) iout=2;
}
else if(pdata[0]->id()==particle->id()) {
if(fb.kinematics->z()>0.5) iout=1;
else iout=2;
}
// apply the vetos for the truncated shower
// no flavour changing branchings
if(iout==0) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
double zsplit = iout==1 ? fb.kinematics->z() : 1-fb.kinematics->z();
// only if same interaction for forced branching
ShowerInteraction::Type type2 = fb.type==ShowerPartnerType::QED ?
ShowerInteraction::QED : ShowerInteraction::QCD;
// and evolution
if(type2==branch->sudakov()->interactionType()) {
if(zsplit < 0.5 || // hardest line veto
fb.kinematics->scale()*zsplit < branch->scale() ) { // angular ordering veto
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// pt veto
if(fb.kinematics->pT() > progenitor()->maximumpT(type2)) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// standard vetos for all emissions
if(timeLikeVetoed(fb,particle)) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
continue;
}
break;
}
// normal case
if(!branch) {
if(fb.kinematics) fb.hard = false;
return fb;
}
// truncated emission
if(fb.kinematics) {
fb.hard = false;
fb.iout = iout;
return fb;
}
// otherwise need to return the hard emission
// construct the kinematics for the hard emission
ShoKinPtr showerKin=
branch->sudakov()->createFinalStateBranching(branch->scale(),
branch->children()[0]->z(),
branch->phi(),
branch->children()[0]->pT());
showerKin->initialize( *particle,PPtr() );
IdList idlist(3);
idlist[0] = particle->id();
idlist[1] = branch->children()[0]->branchingParticle()->id();
idlist[2] = branch->children()[1]->branchingParticle()->id();
fb = Branching( showerKin, idlist, branch->sudakov(),branch->type() );
fb.hard = true;
fb.iout=0;
// return it
return fb;
}
Branching Evolver::selectSpaceLikeDecayBranching(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minmass,ShowerInteraction::Type type,
HardBranchingPtr branch) {
Branching fb;
unsigned int iout=0;
tcPDPtr pdata[2];
while (true) {
// break if doing truncated shower and no truncated shower needed
if(branch && (!isTruncatedShowerON()||hardOnly())) break;
// select branching
fb=_splittingGenerator->chooseDecayBranching(*particle,maxScales,minmass,
_initialenhance,type);
// return if no radiation
if(!fb.kinematics) break;
// special for truncated shower
if(branch) {
// check haven't evolved too far
if(fb.kinematics->scale() < branch->scale()) {
fb=Branching();
break;
}
// get the particle data objects
for(unsigned int ix=0;ix<2;++ix) pdata[ix]=getParticleData(fb.ids[ix+1]);
if(particle->id()!=fb.ids[0]) {
for(unsigned int ix=0;ix<2;++ix) {
tPDPtr cc(pdata[ix]->CC());
if(cc) pdata[ix]=cc;
}
}
// find the truncated line
iout=0;
if(pdata[0]->id()!=pdata[1]->id()) {
if(pdata[0]->id()==particle->id()) iout=1;
else if (pdata[1]->id()==particle->id()) iout=2;
}
else if(pdata[0]->id()==particle->id()) {
if(fb.kinematics->z()>0.5) iout=1;
else iout=2;
}
// apply the vetos for the truncated shower
// no flavour changing branchings
if(iout==0) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
ShowerInteraction::Type type2 = fb.type==ShowerPartnerType::QED ?
ShowerInteraction::QED : ShowerInteraction::QCD;
double zsplit = iout==1 ? fb.kinematics->z() : 1-fb.kinematics->z();
if(type2==branch->sudakov()->interactionType()) {
if(zsplit < 0.5 || // hardest line veto
fb.kinematics->scale()*zsplit < branch->scale() ) { // angular ordering veto
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// pt veto
if(fb.kinematics->pT() > progenitor()->maximumpT(type2)) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// if not vetoed break
if(spaceLikeDecayVetoed(fb,particle)) {
// otherwise reset scale and continue
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
break;
}
// normal case
if(!branch) {
if(fb.kinematics) fb.hard = false;
return fb;
}
// truncated emission
if(fb.kinematics) {
fb.hard = false;
fb.iout = iout;
return fb;
}
// otherwise need to return the hard emission
// construct the kinematics for the hard emission
ShoKinPtr showerKin=
branch->sudakov()->createDecayBranching(branch->scale(),
branch->children()[0]->z(),
branch->phi(),
branch->children()[0]->pT());
showerKin->initialize( *particle,PPtr() );
IdList idlist(3);
idlist[0] = particle->id();
idlist[1] = branch->children()[0]->branchingParticle()->id();
idlist[2] = branch->children()[1]->branchingParticle()->id();
// create the branching
fb = Branching( showerKin, idlist, branch->sudakov(),ShowerPartnerType::QCDColourLine );
fb.hard=true;
fb.iout=0;
// return it
return fb;
}
diff --git a/Tests/Makefile.am b/Tests/Makefile.am
--- a/Tests/Makefile.am
+++ b/Tests/Makefile.am
@@ -1,357 +1,360 @@
AUTOMAKE_OPTIONS = -Wno-portability
AM_LDFLAGS += -module -avoid-version -rpath /dummy/path/not/used
EXTRA_DIST = Inputs python Rivet
dist-hook:
rm -rf $(distdir)/Inputs/.svn
rm -rf $(distdir)/python/.svn
rm -rf $(distdir)/Rivet/.svn
EXTRA_LTLIBRARIES = LeptonTest.la GammaTest.la HadronTest.la DISTest.la
if WANT_LIBFASTJET
EXTRA_LTLIBRARIES += HadronJetTest.la LeptonJetTest.la
HadronJetTest_la_SOURCES = \
Hadron/VHTest.h Hadron/VHTest.cc\
Hadron/VTest.h Hadron/VTest.cc\
Hadron/HTest.h Hadron/HTest.cc
HadronJetTest_la_CPPFLAGS = $(AM_CPPFLAGS) $(FASTJETINCLUDE) \
-I$(FASTJETPATH)
HadronJetTest_la_LIBADD = $(FASTJETLIBS)
LeptonJetTest_la_SOURCES = \
Lepton/TopDecay.h Lepton/TopDecay.cc
LeptonJetTest_la_CPPFLAGS = $(AM_CPPFLAGS) $(FASTJETINCLUDE) \
-I$(FASTJETPATH)
LeptonJetTest_la_LIBADD = $(FASTJETLIBS)
endif
LeptonTest_la_SOURCES = \
Lepton/VVTest.h Lepton/VVTest.cc \
Lepton/VBFTest.h Lepton/VBFTest.cc \
Lepton/VHTest.h Lepton/VHTest.cc \
Lepton/FermionTest.h Lepton/FermionTest.cc
GammaTest_la_SOURCES = \
Gamma/GammaMETest.h Gamma/GammaMETest.cc \
Gamma/GammaPMETest.h Gamma/GammaPMETest.cc
DISTest_la_SOURCES = \
DIS/DISTest.h DIS/DISTest.cc
HadronTest_la_SOURCES = \
Hadron/HadronVVTest.h Hadron/HadronVVTest.cc\
Hadron/HadronVBFTest.h Hadron/HadronVBFTest.cc\
Hadron/WHTest.h Hadron/WHTest.cc\
Hadron/ZHTest.h Hadron/ZHTest.cc\
Hadron/VGammaTest.h Hadron/VGammaTest.cc\
Hadron/ZJetTest.h Hadron/ZJetTest.cc\
Hadron/WJetTest.h Hadron/WJetTest.cc\
Hadron/QQHTest.h Hadron/QQHTest.cc
REPO = $(top_builddir)/src/HerwigDefaults.rpo
HERWIG = $(top_builddir)/src/Herwig
HWREAD = $(HERWIG) read --repo $(REPO) -L $(builddir)/.libs -i $(top_builddir)/src
HWRUN = $(HERWIG) run
tests : tests-LEP tests-DIS tests-LHC tests-Gamma
if WANT_LIBFASTJET
tests-LEP : test-LEP-VV test-LEP-VH test-LEP-VBF test-LEP-BB test-LEP-Quarks test-LEP-Leptons \
test-LEP-default test-LEP-Powheg test-LEP-TopDecay
else
tests-LEP : test-LEP-VV test-LEP-VH test-LEP-VBF test-LEP-BB test-LEP-Quarks test-LEP-Leptons
endif
tests-DIS : test-DIS-Charged test-DIS-Neutral
if WANT_LIBFASTJET
tests-LHC : test-LHC-WW test-LHC-WZ test-LHC-ZZ test-LHC-ZGamma test-LHC-WGamma \
test-LHC-ZH test-LHC-WH test-LHC-ZJet test-LHC-WJet test-LHC-Z test-LHC-W test-LHC-ZZVBF test-LHC-VBF \
test-LHC-WWVBF test-LHC-bbH test-LHC-ttH test-LHC-GammaGamma test-LHC-GammaJet test-LHC-Higgs \
test-LHC-HiggsJet test-LHC-QCDFast test-LHC-QCD test-LHC-Top test-LHC-Bottom \
test-LHC-WHJet test-LHC-ZHJet test-LHC-HJet test-LHC-ZShower test-LHC-WShower\
test-LHC-WHJet-Powheg test-LHC-ZHJet-Powheg test-LHC-HJet-Powheg \
test-LHC-ZShower-Powheg test-LHC-WShower-Powheg
else
tests-LHC : test-LHC-WW test-LHC-WZ test-LHC-ZZ test-LHC-ZGamma test-LHC-WGamma \
test-LHC-ZH test-LHC-WH test-LHC-ZJet test-LHC-WJet test-LHC-Z test-LHC-W test-LHC-ZZVBF test-LHC-VBF \
test-LHC-WWVBF test-LHC-bbH test-LHC-ttH test-LHC-GammaGamma test-LHC-GammaJet test-LHC-Higgs \
test-LHC-HiggsJet test-LHC-QCDFast test-LHC-QCD test-LHC-Top
endif
tests-Gamma : test-Gamma-FF test-Gamma-WW test-Gamma-P
if WANT_LIBFASTJET
test-LEP-% : Inputs/LEP-%.in LeptonTest.la LeptonJetTest.la
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
else
test-LEP-% : Inputs/LEP-%.in LeptonTest.la
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
endif
Rivet-LHC-Matchbox-% : Rivet/LHC-Matchbox-%.in
if [ ! -d Rivet-$(notdir $(subst .in,,$<)) ]; then mkdir Rivet-$(notdir $(subst .in,,$<)); fi;
cd Rivet-$(notdir $(subst .in,,$<)); echo `pwd`; \
../$(HERWIG) read --repo ../$(REPO) -L ../$(top_builddir)/lib -i ../$(top_builddir)/src ../$<; \
../$(HERWIG) run $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}; \
mv $(notdir $(subst .in,.yoda,$<)) ..; \
cd ..
Rivet-TVT-Matchbox-% : Rivet/TVT-Matchbox-%.in
if [ ! -d Rivet-$(notdir $(subst .in,,$<)) ]; then mkdir Rivet-$(notdir $(subst .in,,$<)); fi;
cd Rivet-$(notdir $(subst .in,,$<)); echo `pwd`; \
../$(HERWIG) read --repo ../$(REPO) -L ../$(top_builddir)/lib -i ../$(top_builddir)/src ../$<; \
../$(HERWIG) run $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}; \
mv $(notdir $(subst .in,.yoda,$<)) ..; \
cd ..
Rivet-TVT-Dipole-% : Rivet/TVT-Dipole-%.in
if [ ! -d Rivet-$(notdir $(subst .in,,$<)) ]; then mkdir Rivet-$(notdir $(subst .in,,$<)); fi;
cd Rivet-$(notdir $(subst .in,,$<)); echo `pwd`; \
../$(HERWIG) read --repo ../$(REPO) -L ../$(top_builddir)/lib -i ../$(top_builddir)/src ../$<; \
../$(HERWIG) run $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}; \
mv $(notdir $(subst .in,.yoda,$<)) ..; \
cd ..
Rivet-LHC-Dipole-% : Rivet/LHC-Dipole-%.in
if [ ! -d Rivet-$(notdir $(subst .in,,$<)) ]; then mkdir Rivet-$(notdir $(subst .in,,$<)); fi;
cd Rivet-$(notdir $(subst .in,,$<)); echo `pwd`; \
../$(HERWIG) read --repo ../$(REPO) -L ../$(top_builddir)/lib -i ../$(top_builddir)/src ../$<; \
../$(HERWIG) run $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}; \
mv $(notdir $(subst .in,.yoda,$<)) ..; \
cd ..
Rivet/LEP-%.in :
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet/DIS-%.in :
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet/BFactory-%.in:
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet/TVT-%.in:
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet/LHC-%.in:
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet/Star-%.in:
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet/SppS-%.in:
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet/ISR-%.in:
python/make_input_files.py $(notdir $(subst .in,,$@))
Rivet-LEP-Matchbox-% : Rivet/LEP-Matchbox-%.in
if [ ! -d Rivet-$(notdir $(subst .in,,$<)) ]; then mkdir Rivet-$(notdir $(subst .in,,$<)); fi;
cd Rivet-$(notdir $(subst .in,,$<)); echo `pwd`; \
../$(HERWIG) read --repo ../$(REPO) -L ../$(top_builddir)/lib -i ../$(top_builddir)/src ../$<; \
../$(HERWIG) run $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}; \
mv $(notdir $(subst .in,.yoda,$<)) ..; \
cd ..
Rivet-LEP-Dipole-% : Rivet/LEP-Dipole-%.in
if [ ! -d Rivet-$(notdir $(subst .in,,$<)) ]; then mkdir Rivet-$(notdir $(subst .in,,$<)); fi;
cd Rivet-$(notdir $(subst .in,,$<)); echo `pwd`; \
../$(HERWIG) read --repo ../$(REPO) -L ../$(top_builddir)/lib -i ../$(top_builddir)/src ../$<; \
../$(HERWIG) run $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}; \
mv $(notdir $(subst .in,.yoda,$<)) ..; \
cd ..
Rivet-BFactory-Matchbox-% : Rivet/BFactory-Matchbox-%.in
if [ ! -d Rivet-$(notdir $(subst .in,,$<)) ]; then mkdir Rivet-$(notdir $(subst .in,,$<)); fi;
cd Rivet-$(notdir $(subst .in,,$<)); echo `pwd`; \
../$(HERWIG) read --repo ../$(REPO) -L ../$(top_builddir)/lib -i ../$(top_builddir)/src ../$<; \
../$(HERWIG) run $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}; \
mv $(notdir $(subst .in,.yoda,$<)) ..; \
cd ..
Rivet-LEP-% : Rivet/LEP-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-BFactory-% : Rivet/BFactory-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-TVT-% : Rivet/TVT-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-DIS-% : Rivet/DIS-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-LHC-% : Rivet/LHC-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-Star-% : Rivet/Star-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-SppS-% : Rivet/SppS-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-ISR-% : Rivet/ISR-%.in
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
Rivet-inputfiles: $(shell echo Rivet/LEP{,-Powheg,-Matchbox,-Dipole,-Matchbox-Powheg}-{10,14,22,35,44,91,130,133,136,161,172,177,183,189,192,196,197,200,202,206,91-nopi}.in) \
$(shell echo Rivet/BFactory{,-Powheg,-Matchbox,-Dipole,-Matchbox-Powheg}-{10.52,10.52-sym,10.54,10.45,10.58}.in) \
$(shell echo Rivet/BFactory-{Upsilon,Upsilon2,Upsilon4,Tau}.in) \
$(shell echo Rivet/DIS{,-NoME,-Powheg,-Matchbox,-Dipole,-Matchbox-Powheg}-{e--LowQ2,e+-LowQ2,e+-HighQ2}.in) \
$(shell echo Rivet/TVT{,-Powheg,-Matchbox,-Dipole,-Matchbox-Powheg}-{Run-I-Z,Run-I-W,Run-I-WZ,Run-II-Z-e,Run-II-Z-{,LowMass-,HighMass-}mu,Run-II-W}.in) \
- $(shell echo Rivet/TVT-Run-II-{DiPhoton,PromptPhoton}.in) \
+ $(shell echo Rivet/TVT-Run-II-{DiPhoton-GammaGamma,DiPhoton-GammaJet,PromptPhoton}.in) \
+ $(shell echo Rivet/TVT-Powheg-Run-II-{DiPhoton-GammaGamma,DiPhoton-GammaJet}.in) \
$(shell echo Rivet/TVT{,-Dipole,-Matchbox,-Matchbox-Powheg}-{Run-II-Jets-{0..11},Run-I-Jets-{1..8}}.in ) \
$(shell echo Rivet/TVT{,-Dipole,-Matchbox,-Matchbox-Powheg}-{630-Jets-{1..3},300-Jets-1,900-Jets-1}.in ) \
$(shell echo Rivet/TVT-{Run-I,Run-II,300,630,900}-UE.in) \
$(shell echo Rivet/LHC{,-Dipole,-Matchbox,-Matchbox-Powheg}-7-Jets-{0..15}.in ) \
$(shell echo Rivet/LHC-{900,2360,2760,7,8,13}-UE.in ) \
$(shell echo Rivet/LHC-{900,7}-UE-Long.in ) \
$(shell echo Rivet/LHC{,-Dipole,-Matchbox,-Matchbox-Powheg}-7-Charm-{1..5}.in) \
$(shell echo Rivet/LHC{,-Dipole,-Matchbox,-Matchbox-Powheg}-7-Bottom-{0..8}.in) \
$(shell echo Rivet/LHC{,-Matchbox,-Matchbox-Powheg}-7-Top-{L,SL,All}.in) \
$(shell echo Rivet/Star-{UE,Jets-{1..4}}.in ) \
$(shell echo Rivet/ISR-{30,44,53,62}-UE.in ) \
$(shell echo Rivet/SppS-{53,63,200,500,900,546}-UE.in ) \
$(shell echo Rivet/LHC{,-Matchbox,-Matchbox-Powheg,-Powheg,-Dipole}-{W-{e,mu},13-Z-{e,mu},Z-{e,mu},Z-LowMass-{e,mu},Z-MedMass-e,WZ,WW-{emu,ll},ZZ-{ll,lv},W-Z-{e,mu},8-Z-mu}.in) \
$(shell echo Rivet/LHC{,-Matchbox,-Matchbox-Powheg,-Dipole}-{7-W-Jet-{1..3}-e,7-Z-Jet-{0..3}-e,7-Z-Jet-0-mu}.in) \
$(shell echo Rivet/LHC{-Matchbox,-Matchbox-Powheg,-Dipole}-{Z-b,Z-bb,W-b,8-Z-jj}.in) \
- $(shell echo Rivet/LHC-7-PromptPhoton-{1..4}.in) \
- Rivet/LHC-7-DiPhoton.in Rivet/LHC-GammaGamma-7.in \
+ $(shell echo Rivet/LHC-7-PromptPhoton-{1..4}.in) Rivet/LHC-GammaGamma-7.in \
+ $(shell echo Rivet/LHC{,-Powheg}-7-{DiPhoton-GammaGamma,DiPhoton-GammaJet}.in) \
$(shell echo Rivet/LHC{,-Powheg,-Matchbox,-Matchbox-Powheg,-Dipole}-{ggH,VBF,WH,ZH}.in) \
$(shell echo Rivet/LHC{,-Powheg,-Matchbox,-Matchbox-Powheg,-Dipole}-8-{ggH,VBF,WH,ZH}{,-GammaGamma}.in) \
$(shell echo Rivet/LHC{,-Matchbox,-Matchbox-Powheg,-Dipole}-ggHJet.in)
Rivet-LEP: $(shell echo Rivet-LEP{,-Powheg,-Matchbox,-Dipole}-{10,14,22,35,44,91,130,133,136,161,172,177,183,189,192,196,197,200,202,206,91-nopi})
rm -rf Rivet-LEP
python/merge-LEP LEP
python/merge-LEP LEP-Powheg
python/merge-LEP LEP-Matchbox
python/merge-LEP LEP-Dipole
rivet-mkhtml -o Rivet-LEP LEP.yoda:Hw++ LEP-Powheg.yoda:Hw++-Powheg LEP-Matchbox.yoda:Hw++-Matchbox LEP-Dipole.yoda:Hw++-Dipole
Rivet-BFactory: $(shell echo Rivet-BFactory{,-Powheg,-Matchbox,-Dipole}-{10.52,10.52-sym,10.54,10.45,10.58}) \
$(shell echo Rivet-BFactory-{Upsilon,Upsilon2,Upsilon4,Tau})
rm -rf Rivet-BFactory
python/merge-BFactory BFactory
python/merge-BFactory BFactory-Powheg
python/merge-BFactory BFactory-Matchbox
python/merge-BFactory BFactory-Dipole
rivet-mkhtml -o Rivet-BFactory BFactory.yoda:Hw++ BFactory-Powheg.yoda:Hw++-Powheg BFactory-Matchbox.yoda:Hw++-Matchbox BFactory-Dipole.yoda:Hw++-Dipole
Rivet-DIS: $(shell echo Rivet-DIS{,-NoME,-Powheg,-Matchbox,-Dipole}-{e--LowQ2,e+-LowQ2,e+-HighQ2})
rm -rf Rivet-DIS
python/merge-DIS DIS
python/merge-DIS DIS-Powheg
python/merge-DIS DIS-NoME
python/merge-DIS DIS-Matchbox
python/merge-DIS DIS-Dipole
rivet-mkhtml -o Rivet-DIS DIS.yoda:Hw++ DIS-Powheg.yoda:Hw++-Powheg DIS-NoME.yoda:Hw++-NoME DIS-Matchbox.yoda:Hw++-Matchbox DIS-Dipole.yoda:Hw++-Dipole
Rivet-TVT-WZ: $(shell echo Rivet-TVT{,-Powheg,-Matchbox,-Dipole}-{Run-I-Z,Run-I-W,Run-I-WZ,Run-II-Z-{e,{,LowMass-,HighMass-}mu},Run-II-W})
rm -rf Rivet-TVT-WZ
python/merge-TVT-EW TVT-Run-II-W.yoda TVT-Run-II-Z-{e,{,LowMass-,HighMass-}mu}.yoda\
TVT-Run-I-{W,Z,WZ}.yoda -o TVT-WZ.yoda
python/merge-TVT-EW TVT-Powheg-Run-II-W.yoda TVT-Powheg-Run-II-Z-{e,{,LowMass-,HighMass-}mu}.yoda\
TVT-Powheg-Run-I-{W,Z,WZ}.yoda -o TVT-Powheg-WZ.yoda
python/merge-TVT-EW TVT-Matchbox-Run-II-W.yoda TVT-Matchbox-Run-II-Z-{e,{,LowMass-,HighMass-}mu}.yoda\
TVT-Matchbox-Run-I-{W,Z,WZ}.yoda -o TVT-Matchbox-WZ.yoda
python/merge-TVT-EW TVT-Dipole-Run-II-W.yoda TVT-Dipole-Run-II-Z-{e,{,LowMass-,HighMass-}mu}.yoda\
TVT-Dipole-Run-I-{W,Z,WZ}.yoda -o TVT-Dipole-WZ.yoda
rivet-mkhtml -o Rivet-TVT-WZ TVT-WZ.yoda:Hw++ TVT-Powheg-WZ.yoda:Hw++-Powheg TVT-Matchbox-WZ.yoda:Hw++-Matchbox TVT-Dipole-WZ.yoda:Hw++-Dipole
-Rivet-TVT-Photon: $(shell echo Rivet-TVT-Run-II-{DiPhoton,PromptPhoton})
-# Rivet-TVT-Run-I-PromptPhoton
- rm -rf Rivet-TVT-Photon
- cat TVT-Run-II-DiPhoton.yoda TVT-Run-II-PromptPhoton.yoda > TVT-Photon.yoda
- rivet-mkhtml -o Rivet-TVT-Photon TVT-Photon.yoda:Hw++
+Rivet-TVT-Photon: $(shell echo Rivet-TVT-Run-II-{DiPhoton-GammaGamma,DiPhoton-GammaJet,PromptPhoton}) \
+ $(shell echo Rivet-TVT-Powheg-Run-II-{DiPhoton-GammaGamma,DiPhoton-GammaJet})
+ rm -rf Rivet-TVT-Photon
+ python/merge-TVT-Photon TVT -o TVT-Photon.yoda
+ python/merge-TVT-Photon TVT-Powheg -o TVT-Powheg-Photon.yoda
+ rivet-mkhtml -o Rivet-TVT-Photon TVT-Photon.yoda:Hw TVT-Powheg-Photon.yoda:Hw-Powheg
Rivet-TVT-Jets: $(shell echo Rivet-TVT-{Run-II-Jets-{0..11},Run-I-Jets-{1..8}} ) \
$(shell echo Rivet-TVT-{630-Jets-{1..3},300-Jets-1,900-Jets-1} ) \
$(shell echo Rivet-TVT-{Run-I,Run-II,300,630,900}-UE)
python/merge-TVT-Energy TVT
rivet-merge-CDF_2012_NOTE10874 TVT-300-Energy.yoda TVT-900-Energy.yoda TVT-1960-Energy.yoda
flat2yoda RatioPlots.dat -o TVT-RatioPlots.yoda
rm -rf Rivet-TVT-Jets
python/merge-TVT-Jets TVT
rivet-mkhtml -o Rivet-TVT-Jets TVT-Jets.yoda:Hw++
Rivet-LHC-Jets: $(shell echo Rivet-LHC-7-Jets-{0..15} ) \
$(shell echo Rivet-LHC-{900,2360,2760,7,8,13}-UE ) \
$(shell echo Rivet-LHC-{900,7}-UE-Long ) \
$(shell echo Rivet-LHC-7-Charm-{1..5}) \
$(shell echo Rivet-LHC-7-Bottom-{0..8}) \
$(shell echo Rivet-LHC-7-Top-{L,SL,All})
rm -rf Rivet-LHC-Jets
python/merge-LHC-Jets
rivet-mkhtml -o Rivet-LHC-Jets LHC-Jets.yoda:Hw++
Rivet-Star: $(shell echo Rivet-Star-{UE,Jets-{1..4}} )
rm -rf Rivet-Star
python/merge-Star Star
rivet-mkhtml -o Rivet-Star Star.yoda
Rivet-SppS: $(shell echo Rivet-ISR-{30,44,53,62}-UE ) \
$(shell echo Rivet-SppS-{53,63,200,500,900,546}-UE )
rm -rf Rivet-SppS
python/merge-SppS SppS
rivet-mkhtml -o Rivet-SppS SppS.yoda
Rivet-LHC-EW: $(shell echo Rivet-LHC{,-Matchbox,-Powheg,-Dipole}-{13-Z-{e,mu},W-{e,mu},Z-{e,mu},Z-LowMass-{e,mu},Z-MedMass-e,WZ,WW-{emu,ll},ZZ-{ll,lv},W-Z-{e,mu},8-Z-mu}) \
$(shell echo Rivet-LHC{,-Matchbox,-Dipole}-{7-W-Jet-{1..3}-e,7-Z-Jet-{0..3}-e,7-Z-Jet-0-mu}) \
$(shell echo Rivet-LHC{-Matchbox,-Dipole}-{Z-b,Z-bb,W-b,8-Z-jj})
rm -rf Rivet-LHC-EW;
python/merge-LHC-EW LHC-{13-Z-{e,mu},W-{e,mu},Z-e,Z-mu,Z-LowMass-{e,mu},Z-MedMass-e,W-Z-{e,mu},WW-{emu,ll},WZ,ZZ-{ll,lv}}.yoda LHC-7-{W,Z}-Jet-{1,2,3}-e.yoda -o LHC-EW.yoda;
python/merge-LHC-EW LHC-Matchbox-{13-Z-{e,mu},W-{e,mu},Z-{e,mu},Z-LowMass-{e,mu},Z-MedMass-e,W-Z-{e,mu},WW-{emu,ll},WZ,ZZ-{ll,lv}}.yoda LHC-Matchbox-7-{W,Z}-Jet-{1,2,3}-e.yoda -o LHC-Matchbox-EW.yoda;
python/merge-LHC-EW LHC-Dipole-{13-Z-{e,mu},W-{e,mu},Z-{e,mu},Z-LowMass-{e,mu},Z-MedMass-e,W-Z-{e,mu},WW-{emu,ll},WZ,ZZ-{ll,lv}}.yoda LHC-Dipole-7-{W,Z}-Jet-{1,2,3}-e.yoda -o LHC-Dipole-EW.yoda;
python/merge-LHC-EW LHC-Powheg-{W-{e,mu},Z-{e,mu},Z-LowMass-{e,mu},Z-MedMass-e,W-Z-{e,mu},WW-{emu,ll},WZ,ZZ-{ll,lv}}.yoda -o LHC-Powheg-EW.yoda;
rivet-mkhtml -o Rivet-LHC-EW LHC-EW.yoda:Hw++ LHC-Powheg-EW.yoda:Hw++-Powheg LHC-Matchbox-EW.yoda:Hw++-Matchbox LHC-Matchbox-Z-b.yoda:Hw++-Matchbox-Zb \
LHC-Matchbox-Z-bb.yoda:Hw++-Matchbox-Zbb LHC-Matchbox-W-b.yoda:Hw++-Matchbox-W-bb LHC-Dipole-EW.yoda:Hw++-Dipole \
LHC-Dipole-Z-b.yoda:Hw++-Dipole-Zb LHC-Dipole-Z-bb.yoda:Hw++-Dipole-Zbb LHC-Dipole-W-b.yoda:Hw++-Dipole-W-bb;
-Rivet-LHC-Photon: $(shell echo Rivet-LHC-7-PromptPhoton-{1..4}) \
- Rivet-LHC-7-DiPhoton Rivet-LHC-GammaGamma-7
- rm -rf Rivet-LHC-Photon
- python/merge-LHC-Photon -o LHC-Photon.yoda
- rivet-mkhtml -o Rivet-LHC-Photon LHC-Photon.yoda:Hw++
+Rivet-LHC-Photon: $(shell echo Rivet-LHC-7-PromptPhoton-{1..4}) Rivet-LHC-GammaGamma-7 \
+ $(shell echo Rivet-LHC{,-Powheg}-7-{DiPhoton-GammaGamma,DiPhoton-GammaJet})
+ rm -rf Rivet-LHC-Photon
+ python/merge-LHC-Photon LHC -o LHC-Photon.yoda
+ python/merge-LHC-Photon LHC-Powheg -o LHC-Powheg-Photon.yoda
+ rivet-mkhtml -o Rivet-LHC-Photon LHC-Photon.yoda:Hw LHC-Powheg-Photon.yoda:Hw-Powheg
Rivet-LHC-Higgs: $(shell echo Rivet-LHC{,-Powheg}-{ggH,VBF,WH,ZH})\
$(shell echo Rivet-LHC{,-Powheg}-8-{ggH,VBF,WH,ZH}{,-GammaGamma}) Rivet-LHC-ggHJet
rm -rf Rivet-LHC-Higgs
rivet-mkhtml -o Rivet-LHC-Higgs LHC-Powheg-ggH.yoda:gg-Powheg LHC-ggH.yoda:gg LHC-ggHJet.yoda:HJet \
LHC-Powheg-VBF.yoda:VBF-Powheg LHC-VBF.yoda:VBF LHC-WH.yoda:WH LHC-ZH.yoda:ZH \
LHC-Powheg-WH.yoda:WH-Powheg LHC-Powheg-ZH.yoda:ZH-Powheg
tests-Rivet : Rivet-LEP Rivet-BFactory Rivet-DIS Rivet-TVT-WZ Rivet-TVT-Photon Rivet-TVT-Jets Rivet-LHC-Jets Rivet-Star Rivet-SppS Rivet-LHC-EW Rivet-LHC-Photon
test-Gamma-% : Inputs/Gamma-%.in GammaTest.la
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
test-DIS-% : Inputs/DIS-%.in DISTest.la
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
if WANT_LIBFASTJET
test-LHC-% : Inputs/LHC-%.in HadronTest.la GammaTest.la HadronJetTest.la
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
else
test-LHC-% : Inputs/LHC-%.in HadronTest.la GammaTest.la
$(HWREAD) $<
$(HWRUN) $(notdir $(subst .in,.run,$<)) -N $${NUMEVENTS:-10000}
endif
clean-local:
rm -f *.out *.log *.tex *.top *.run *.dump *.mult *.Bmult *.yoda
diff --git a/Tests/python/make_input_files.py b/Tests/python/make_input_files.py
--- a/Tests/python/make_input_files.py
+++ b/Tests/python/make_input_files.py
@@ -1,1318 +1,1356 @@
#! /usr/bin/env python
import logging,sys,os
from string import strip, Template
import sys
if sys.version_info[:3] < (2,4,0):
print "rivet scripts require Python version >= 2.4.0... exiting"
sys.exit(1)
if __name__ == "__main__":
import logging
from optparse import OptionParser, OptionGroup
parser = OptionParser(usage="%prog name [...]")
(opts, args) = parser.parse_args()
## Check args
if len(args) != 1:
logging.error("Must specify at least input file")
sys.exit(1)
name=args[0]
collider=""
# select the template to load
# collider
parameters = {}
if(name.find("BFactory")==0) :
collider="BFactory"
elif(name.find("LEP")==0) :
collider="LEP"
elif(name.find("DIS")==0) :
collider="DIS"
elif(name.find("TVT")==0) :
collider="TVT"
elif(name.find("LHC-GammaGamma")==0) :
collider="LHC-GammaGamma"
elif(name.find("LHC")==0) :
collider="LHC"
elif(name.find("ISR")==0) :
collider="ISR"
elif(name.find("SppS")==0) :
collider="SppS"
elif(name.find("Star")==0) :
collider="Star"
simulation=""
istart = 1
print name
if(name.find("Matchbox-Powheg")>0) :
istart = 3
simulation="Matchbox"
parameters["shower"] = "read Matchbox/Powheg-DefaultShower.in\n"
elif(name.find("Matchbox")>0) :
istart = 2
simulation="Matchbox"
parameters["shower"] = "read Matchbox/MCatNLO-DefaultShower.in\n"
elif(name.find("Dipole")>0) :
istart = 2
simulation="Matchbox"
parameters["shower"] = "read Matchbox/MCatNLO-DipoleShower.in\n"
elif(name.find("Powheg")>0) :
istart = 2
simulation="Powheg"
if(simulation=="Matchbox") :
parameters["bscheme"] = "read Matchbox/FiveFlavourScheme.in\n"
if(parameters["shower"].find("Dipole")>=0) :
parameters["bscheme"] += "read Matchbox/FiveFlavourNoBMassScheme.in\n"
if(collider.find("DIS")<0) :
parameters["nlo"] = "read Matchbox/MadGraph-OpenLoops.in\n"
if(collider=="") :
logging.error("Can\'t find collider")
sys.exit(1)
# find the template
if(simulation=="") :
if(collider.find("LHC-GammaGamma") >=0) :
istart += 1
templateName="Hadron-Gamma.in"
elif(collider.find("TVT")>=0 or collider.find("LHC") >=0 or
collider.find("ISR")>=0 or collider.find("SppS")>=0 or
collider.find("Star")>=0) :
templateName="Hadron.in"
elif(collider.find("BFactory")<0) :
templateName= "%s.in" % (collider)
else :
templateName= "LEP.in"
else :
if(collider.find("TVT")>=0 or collider.find("LHC") >=0 or
collider.find("ISR")>=0 or collider.find("SppS")>=0 or
collider.find("Star")>=0) :
templateName= "Hadron-%s.in" % (simulation)
elif(collider.find("BFactory")<0) :
templateName= "%s-%s.in" % (collider,simulation)
else :
templateName= "LEP-%s.in" % (simulation)
with open(os.path.join("Rivet/Templates",templateName), 'r') as f:
templateText = f.read()
template = Template( templateText )
# work out the name of the parameter file
nameSplit=name.split("-")
parameterName=nameSplit[istart]
for i in range(istart+1,len(nameSplit)) :
parameterName += "-%s" % nameSplit[i]
# work out the process and parameters
process=""
# Bfactory
if(collider=="BFactory") :
if(simulation=="") :
process = "set /Herwig/MatrixElements/MEee2gZ2qq:MaximumFlavour 4"
if(parameterName=="10.58") :
process += "\ncreate Herwig::MEee2VectorMeson /Herwig/MatrixElements/MEUpsilon HwMELepton.so\nset /Herwig/MatrixElements/MEUpsilon:VectorMeson /Herwig/Particles/Upsilon(4S)\nset /Herwig/MatrixElements/MEUpsilon:Coupling 0.0004151809\ninsert /Herwig/MatrixElements/SimpleEE:MatrixElements 0 /Herwig/MatrixElements/MEUpsilon"
elif(simulation=="Powheg") :
process = "set /Herwig/MatrixElements/PowhegMEee2gZ2qq:MaximumFlavour 4"
if(parameterName=="10.58") :
process += "\ncreate Herwig::MEee2VectorMeson /Herwig/MatrixElements/MEUpsilon HwMELepton.so\nset /Herwig/MatrixElements/MEUpsilon:VectorMeson /Herwig/Particles/Upsilon(4S)\nset /Herwig/MatrixElements/MEUpsilon:Coupling 0.0004151809\ninsert /Herwig/MatrixElements/SimpleEE:MatrixElements 0 /Herwig/MatrixElements/MEUpsilon"
elif(simulation=="Matchbox" ) :
process = "do Factory:Process e- e+ -> u ubar\ndo Factory:Process e- e+ -> d dbar\ndo Factory:Process e- e+ -> c cbar\ndo Factory:Process e- e+ -> s sbar"
if(parameterName=="10.58") :
process += "\ninsert /Herwig/Generators/EventGenerator:EventHandler:SubProcessHandlers 0 /Herwig/MatrixElements/SimpleEE\ncreate Herwig::MEee2VectorMeson /Herwig/MatrixElements/MEUpsilon HwMELepton.so\nset /Herwig/MatrixElements/MEUpsilon:VectorMeson /Herwig/Particles/Upsilon(4S)\nset /Herwig/MatrixElements/MEUpsilon:Coupling 0.0004151809\ninsert /Herwig/MatrixElements/SimpleEE:MatrixElements 0 /Herwig/MatrixElements/MEUpsilon\n"
# DIS
elif(collider=="DIS") :
if(simulation=="") :
if(parameterName.find("NoME")>=0) :
process = "set /Herwig/Shower/Evolver:MECorrMode 0"
parameterName=parameterName.replace("NoME-","")
else :
process = ""
elif(simulation=="Powheg") :
process = ""
elif(simulation=="Matchbox" ) :
if(parameterName.find("e-")>=0) :
process="do Factory:Process e- p -> e- j"
else :
process="do Factory:Process e+ p -> e+ j"
# LEP
elif(collider=="LEP") :
if(simulation=="") :
process=""
if(parameterName=="10") :
process="set /Herwig/MatrixElements/MEee2gZ2qq:MaximumFlavour 4"
elif(simulation=="Powheg") :
process=""
if(parameterName=="10") :
process="set /Herwig/MatrixElements/PowhegMEee2gZ2qq:MaximumFlavour 4"
elif(simulation=="Matchbox" ) :
if(parameterName=="10") :
process="do Factory:Process e- e+ -> u ubar\ndo Factory:Process e- e+ -> d dbar\ndo Factory:Process e- e+ -> c cbar\ndo Factory:Process e- e+ -> s sbar"
else :
process="do Factory:Process e- e+ -> j j"
# TVT
elif(collider=="TVT") :
process="set /Herwig/Generators/EventGenerator:EventHandler:BeamB /Herwig/Particles/pbar-\n"
if(parameterName.find("Run-II")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 1960.0\n"
elif(parameterName.find("Run-I")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 1800.0\n"
elif(parameterName.find("900")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 900.0\n"
elif(parameterName.find("630")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 630.0\n"
elif(parameterName.find("300")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 300.0\n"
if(simulation=="") :
if(parameterName.find("PromptPhoton")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEGammaJet\n"
process+="set /Herwig/Cuts/PhotonKtCut:MinKT 15.\n"
- elif(parameterName.find("DiPhoton")>=0) :
+ elif(parameterName.find("DiPhoton-GammaGamma")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEGammaGamma\n"
process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaGamma","")
+ elif(parameterName.find("DiPhoton-GammaJet")>=0) :
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaJet\n"
+ process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaJet","")
elif(parameterName.find("UE")>=0) :
process += "insert SimpleQCD:MatrixElements[0] MEMinBias\n"
process += "set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
process += "set /Herwig/Generators/EventGenerator:EventHandler:Cuts /Herwig/Cuts/MinBiasCuts\n"
process += "create Herwig::MPIXSecReweighter /Herwig/Generators/MPIXSecReweighter\n"
process += "insert /Herwig/Generators/EventGenerator:EventHandler:PostSubProcessHandlers 0 /Herwig/Generators/MPIXSecReweighter\n"
process += "set /Herwig/Decays/DecayHandler:LifeTimeOption 0\n"
process += "set /Herwig/Decays/DecayHandler:MaxLifeTime 10*mm\n"
elif(parameterName.find("Jets")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEQCD2to2\n"
process+="set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
if(parameterName.find("Run-II-Jets-10")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 500.*GeV\n"
elif(parameterName.find("Run-II-Jets-11")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 900.*GeV\n"
elif(parameterName.find("Run-I-Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
elif(parameterName.find("Run-I-Jets-2")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 40.\n"
elif(parameterName.find("Run-I-Jets-3")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 65.\n"
elif(parameterName.find("Run-I-Jets-4")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 90.\n"
elif(parameterName.find("Run-I-Jets-5")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 160.\n"
elif(parameterName.find("Run-I-Jets-6")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 100.*GeV\n"
elif(parameterName.find("Run-I-Jets-7")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 400.*GeV\n"
elif(parameterName.find("Run-I-Jets-8")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 700.*GeV\n"
elif(parameterName.find("Run-II-Jets-0")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 15.\n"
elif(parameterName.find("Run-II-Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 25.\n"
elif(parameterName.find("Run-II-Jets-2")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 40.\n"
elif(parameterName.find("Run-II-Jets-3")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 60.\n"
elif(parameterName.find("Run-II-Jets-4")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 85.\n"
elif(parameterName.find("Run-II-Jets-5")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 110.\n"
elif(parameterName.find("Run-II-Jets-6")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 160.\n"
elif(parameterName.find("Run-II-Jets-7")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 250.\n"
elif(parameterName.find("Run-II-Jets-8")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 100.*GeV\n"
elif(parameterName.find("Run-II-Jets-9")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 300.*GeV\n"
elif(parameterName.find("900-Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 10.\n"
elif(parameterName.find("300-Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 6.\n"
elif(parameterName.find("630-Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
elif(parameterName.find("630-Jets-2")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 40.\n"
elif(parameterName.find("630-Jets-3")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 75.\n"
elif(parameterName.find("900-Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 10.\n"
elif(parameterName.find("Run-I-WZ")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2W2ff\nset MEqq2W2ff:Process Electron\ninsert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Electron\n"
elif(parameterName.find("Run-I-W")>=0 or parameterName.find("Run-II-W")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2W2ff\nset MEqq2W2ff:Process Electron\n"
elif(parameterName.find("Run-I-Z")>=0 or parameterName.find("Run-II-Z-e")>=0) :
process +="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Electron\n"
elif(parameterName.find("Run-II-Z-LowMass-mu")>=0) :
process +="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Muon\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 25*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 70*GeV\n"
elif(parameterName.find("Run-II-Z-HighMass-mu")>=0) :
process +="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Muon\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 150*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 600*GeV\n"
elif(parameterName.find("Run-II-Z-mu")>=0) :
process +="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Muon\n"
elif(simulation=="Powheg") :
if(parameterName.find("Run-I-WZ")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2W2ff\nset PowhegMEqq2W2ff:Process Electron\ninsert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Electron\n"
elif(parameterName.find("Run-I-W")>=0 or parameterName.find("Run-II-W")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2W2ff\nset PowhegMEqq2W2ff:Process Electron\n"
elif(parameterName.find("Run-I-Z")>=0 or parameterName.find("Run-II-Z-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Electron\n"
elif(parameterName.find("Run-II-Z-LowMass-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Muon\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 25*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 70*GeV\n"
elif(parameterName.find("Run-II-Z-HighMass-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Muon\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 150*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 600*GeV\n"
elif(parameterName.find("Run-II-Z-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Muon\n"
+ elif(parameterName.find("DiPhoton-GammaGamma")>=0) :
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaGammaPowheg\n"
+ process+="set MEGammaGammaPowheg:Process GammaGamma\n"
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaGamma\n"
+ process+="set MEGammaGamma:Process gg\n"
+ process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ process+="set /Herwig/Cuts/JetKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaGamma","")
+ elif(parameterName.find("DiPhoton-GammaJet")>=0) :
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaGammaPowheg\n"
+ process+="set MEGammaGammaPowheg:Process VJet\n"
+ process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ process+="set /Herwig/Cuts/JetKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaJet","")
elif(simulation=="Matchbox" ) :
if(parameterName.find("Jets")>=0) :
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 0\n"
process+="do Factory:Process p p j j\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/MaxJetPtScale\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
if(parameterName.find("Run-II-Jets-10")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 500.*GeV\n"
elif(parameterName.find("Run-II-Jets-11")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 900.*GeV\n"
elif(parameterName.find("Run-II-Jets-12")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 300.*GeV\n"
elif(parameterName.find("Run-I-Jets-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 20.\n"
elif(parameterName.find("Run-I-Jets-2")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 40.\n"
elif(parameterName.find("Run-I-Jets-3")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 65.\n"
elif(parameterName.find("Run-I-Jets-4")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 90.\n"
elif(parameterName.find("Run-I-Jets-5")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 160.\n"
elif(parameterName.find("Run-I-Jets-6")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 100.*GeV\n"
elif(parameterName.find("Run-I-Jets-7")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 400.*GeV\n"
elif(parameterName.find("Run-I-Jets-8")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 700.*GeV\n"
elif(parameterName.find("Run-II-Jets-0")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 15.\n"
elif(parameterName.find("Run-II-Jets-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 25.\n"
elif(parameterName.find("Run-II-Jets-2")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 40.\n"
elif(parameterName.find("Run-II-Jets-3")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 60.\n"
elif(parameterName.find("Run-II-Jets-4")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 85.\n"
elif(parameterName.find("Run-II-Jets-5")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 110.\n"
elif(parameterName.find("Run-II-Jets-6")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 160.\n"
elif(parameterName.find("Run-II-Jets-7")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 250.\n"
elif(parameterName.find("Run-II-Jets-8")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 100.*GeV\n"
elif(parameterName.find("Run-II-Jets-9")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 300.*GeV\n"
elif(parameterName.find("900-Jets-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 10.\n"
elif(parameterName.find("300-Jets-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 6.\n"
elif(parameterName.find("630-Jets-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 20.\n"
elif(parameterName.find("630-Jets-2")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 40.\n"
elif(parameterName.find("630-Jets-3")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 75.\n"
elif(parameterName.find("900-Jets-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 10.\n"
elif(parameterName.find("Run-I-WZ")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p pbar e+ e-\ndo Factory:Process p pbar e+ nu\ndo Factory:Process p pbar e- nu\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Run-I-W")>=0 or parameterName.find("Run-II-W")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p pbar e+ nu\ndo Factory:Process p pbar e- nu\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Run-I-Z")>=0 or parameterName.find("Run-II-Z-e")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p pbar e+ e-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Run-II-Z-LowMass-mu")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p pbar mu+ mu-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 25*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 70*GeV\n"
elif(parameterName.find("Run-II-Z-HighMass-mu")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p pbar mu+ mu-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 150.*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 600*GeV\n"
elif(parameterName.find("Run-II-Z-mu")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p pbar mu+ mu-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
# Star
elif(collider=="Star" ) :
process = "set /Herwig/Decays/DecayHandler:LifeTimeOption 0\n"
process+= "set /Herwig/Decays/DecayHandler:MaxLifeTime 10*mm\n"
process+= "set /Herwig/Generators/EventGenerator:EventHandler:BeamB /Herwig/Particles/p+\n"
process+= "set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 200.0\n"
process+= "set /Herwig/Cuts/QCDCuts:X2Min 0.01\n"
if(simulation=="") :
if(parameterName.find("UE")>=0) :
process += "insert SimpleQCD:MatrixElements[0] MEMinBias\n"
process += "set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
process += "set /Herwig/Generators/EventGenerator:EventHandler:Cuts /Herwig/Cuts/MinBiasCuts\n"
process += "create Herwig::MPIXSecReweighter /Herwig/Generators/MPIXSecReweighter\n"
process += "insert /Herwig/Generators/EventGenerator:EventHandler:PostSubProcessHandlers 0 /Herwig/Generators/MPIXSecReweighter\n"
else :
process+="insert SimpleQCD:MatrixElements[0] MEQCD2to2\n"
process+="set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
if(parameterName.find("Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 2.\n"
elif(parameterName.find("Jets-2")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 5.\n"
elif(parameterName.find("Jets-3")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
elif(parameterName.find("Jets-4")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 25.\n"
else :
logging.error("Star not supported for %s " % simulation)
sys.exit(1)
# ISR and SppS
elif(collider=="ISR" or collider =="SppS" ) :
process="set /Herwig/Decays/DecayHandler:LifeTimeOption 0\n"
process+="set /Herwig/Decays/DecayHandler:MaxLifeTime 10*mm\n"
if(collider=="SppS") :
process ="set /Herwig/Generators/EventGenerator:EventHandler:BeamB /Herwig/Particles/pbar-\n"
if(parameterName.find("30")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 30.4\n"
elif(parameterName.find("44")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 44.4\n"
elif(parameterName.find("53")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 53.0\n"
elif(parameterName.find("62")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 62.2\n"
elif(parameterName.find("63")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 63.0\n"
elif(parameterName.find("200")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 200.0\n"
elif(parameterName.find("500")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 500.0\n"
elif(parameterName.find("546")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 546.0\n"
elif(parameterName.find("900")>=0) :
process+="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 900.0\n"
if(simulation=="") :
process += "insert SimpleQCD:MatrixElements[0] MEMinBias\n"
process += "set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
process += "set /Herwig/Generators/EventGenerator:EventHandler:Cuts /Herwig/Cuts/MinBiasCuts\n"
process += "create Herwig::MPIXSecReweighter /Herwig/Generators/MPIXSecReweighter\n"
process += "insert /Herwig/Generators/EventGenerator:EventHandler:PostSubProcessHandlers 0 /Herwig/Generators/MPIXSecReweighter\n"
else :
logging.error(" SppS and ISR not supported for %s " % simulation)
sys.exit(1)
# LHC
elif(collider=="LHC") :
if(parameterName.find("7-")==0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 7000.0\n"
elif(parameterName.find("8-")==0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 8000.0\n"
elif(parameterName.find("13-")==0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 13000.0\n"
elif(parameterName.find("900")==0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 900.0\n"
elif(parameterName.find("2360")==0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 2360.0\n"
elif(parameterName.find("2760")==0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 2760.0\n"
else :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 7000.0\n"
if(simulation=="") :
if(parameterName.find("8-VBF")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2HiggsVBF\n"
elif(parameterName.find("VBF")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
process+="insert SimpleQCD:MatrixElements[0] MEPP2HiggsVBF\n"
elif(parameterName.find("ggHJet")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
process+="insert SimpleQCD:MatrixElements[0] MEHiggsJet\n"
elif(parameterName.find("8-ggH")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEHiggs\n"
process+="insert SimpleQCD:MatrixElements[0] MEHiggsJet\n"
process+="set MEHiggsJet:Process qqbar\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("ggH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
process+="insert SimpleQCD:MatrixElements[0] MEHiggs\n"
process+="insert SimpleQCD:MatrixElements[0] MEHiggsJet\n"
process+="set MEHiggsJet:Process qqbar\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("PromptPhoton")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEGammaJet\n"
if(parameterName.find("PromptPhoton-1")>=0) :
process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
elif(parameterName.find("PromptPhoton-2")>=0) :
process+="set /Herwig/Cuts/PhotonKtCut:MinKT 25.\n"
elif(parameterName.find("PromptPhoton-3")>=0) :
process+="set /Herwig/Cuts/PhotonKtCut:MinKT 80.\n"
elif(parameterName.find("PromptPhoton-4")>=0) :
process+="set /Herwig/Cuts/PhotonKtCut:MinKT 150.\n"
- elif(parameterName.find("DiPhoton")>=0) :
+ elif(parameterName.find("DiPhoton-GammaGamma")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEGammaGamma\n"
process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaGamma","")
+ elif(parameterName.find("DiPhoton-GammaJet")>=0) :
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaJet\n"
+ process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaJet","")
elif(parameterName.find("8-WH")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2WH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("8-ZH")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2ZH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("WH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->b,bbar;\n"
process+="do /Herwig/Particles/W+:SelectDecayModes W+->nu_e,e+; W+->nu_mu,mu+;\n"
process+="insert SimpleQCD:MatrixElements[0] MEPP2WH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("ZH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->b,bbar;\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes Z0->e-,e+; Z0->mu-,mu+;\n"
process+="insert SimpleQCD:MatrixElements[0] MEPP2ZH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("UE")>=0) :
process += "insert SimpleQCD:MatrixElements[0] MEMinBias\n"
process += "set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
process += "set /Herwig/Generators/EventGenerator:EventHandler:Cuts /Herwig/Cuts/MinBiasCuts\n"
process += "create Herwig::MPIXSecReweighter /Herwig/Generators/MPIXSecReweighter\n"
process += "insert /Herwig/Generators/EventGenerator:EventHandler:PostSubProcessHandlers 0 /Herwig/Generators/MPIXSecReweighter\n"
if(parameterName.find("Long")>=0) :
process += "set /Herwig/Decays/DecayHandler:MaxLifeTime 100*mm\n"
elif(parameterName.find("7-Jets")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEQCD2to2\n"
process+="set MEQCD2to2:MaximumFlavour 5\n"
process+="set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
if(parameterName.find("7-Jets-0")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 5.\n"
elif(parameterName.find("7-Jets-10")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 200.*GeV\n"
elif(parameterName.find("7-Jets-11")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 600.*GeV\n"
elif(parameterName.find("7-Jets-12")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 1000.*GeV\n"
elif(parameterName.find("7-Jets-13")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 1600.*GeV\n"
elif(parameterName.find("7-Jets-14")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 2200.*GeV\n"
elif(parameterName.find("7-Jets-15")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 2800.*GeV\n"
elif(parameterName.find("7-Jets-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 10.\n"
elif(parameterName.find("7-Jets-2")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
elif(parameterName.find("7-Jets-3")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 40.\n"
elif(parameterName.find("7-Jets-4")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 70.\n"
elif(parameterName.find("7-Jets-5")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 150.\n"
elif(parameterName.find("7-Jets-6")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 200.\n"
elif(parameterName.find("7-Jets-7")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 300.\n"
elif(parameterName.find("7-Jets-8")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 500.\n"
elif(parameterName.find("7-Jets-9")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 90.*GeV\n"
elif(parameterName.find("7-Charm")>=0 or \
parameterName.find("7-Bottom")>=0) :
if(parameterName.find("7-Bottom")>=0) :
process+="cp MEHeavyQuark MEBottom\n"
process+="set MEBottom:QuarkType Bottom\n"
process+="insert SimpleQCD:MatrixElements[0] MEBottom\n"
else :
process+="cp MEHeavyQuark MECharm\n"
process+="set MECharm:QuarkType Charm\n"
process+="insert SimpleQCD:MatrixElements[0] MECharm\n"
process+="set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
if(parameterName.find("7-Heavy-0")>=0) :
if(parameterName.find("7-Bottom")>=0) :
process+="set MEBottom:Process Pair\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.\n"
elif(parameterName.find("-1")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 5.\n"
elif(parameterName.find("-2")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 20.\n"
elif(parameterName.find("-3")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 50.\n"
elif(parameterName.find("-4")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 80.\n"
elif(parameterName.find("-5")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 110.\n"
elif(parameterName.find("-6")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 90.*GeV\n"
elif(parameterName.find("-7")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 340.*GeV\n"
elif(parameterName.find("-8")>=0) :
process+="set /Herwig/Cuts/JetKtCut:MinKT 30.\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 500.*GeV\n"
elif(parameterName.find("7-Top-L")>=0) :
process+="set MEHeavyQuark:QuarkType Top\n"
process+="insert SimpleQCD:MatrixElements[0] MEHeavyQuark\n"
process+="do /Herwig/Particles/t:SelectDecayModes t->nu_e,e+,b; t->nu_mu,mu+,b;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("7-Top-SL")>=0) :
process+="set MEHeavyQuark:QuarkType Top\n"
process+="insert SimpleQCD:MatrixElements[0] MEHeavyQuark\n"
process+="set /Herwig/Particles/t:Synchronized Not_synchronized\n"
process+="set /Herwig/Particles/tbar:Synchronized Not_synchronized\n"
process+="do /Herwig/Particles/t:SelectDecayModes t->nu_e,e+,b; t->nu_mu,mu+,b;\n"
process+="do /Herwig/Particles/tbar:SelectDecayModes tbar->b,bbar,cbar; tbar->bbar,cbar,d; tbar->bbar,cbar,s; tbar->bbar,s,ubar; tbar->bbar,ubar,d;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("7-Top-All")>=0) :
process+="set MEHeavyQuark:QuarkType Top\n"
process+="insert SimpleQCD:MatrixElements[0] MEHeavyQuark\n"
elif(parameterName.find("WZ")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2VV\nset MEPP2VV:Process WZ\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+; /Herwig/Particles/W+/W+->nu_mu,mu+;\n"
process+="do /Herwig/Particles/W-:SelectDecayModes /Herwig/Particles/W-/W-->nu_ebar,e-; /Herwig/Particles/W-/W-->nu_mubar,mu-;\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("WW-emu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2VV\nset MEPP2VV:Process WW\n"
process+="set /Herwig/Particles/W+:Synchronized 0\n"
process+="set /Herwig/Particles/W-:Synchronized 0\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+;\n"
process+="do /Herwig/Particles/W-:SelectDecayModes /Herwig/Particles/W-/W-->nu_mubar,mu-;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("WW-ll")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2VV\nset MEPP2VV:Process WW\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+; /Herwig/Particles/W+/W+->nu_mu,mu+; /Herwig/Particles/W+/W+->nu_tau,tau+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("ZZ-ll")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2VV\nset MEPP2VV:Process ZZ\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+; /Herwig/Particles/Z0/Z0->tau-,tau+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("ZZ-lv")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEPP2VV\nset MEPP2VV:Process ZZ\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+; /Herwig/Particles/Z0/Z0->tau-,tau+; /Herwig/Particles/Z0/Z0->nu_e,nu_ebar; /Herwig/Particles/Z0/Z0->nu_mu,nu_mubar; /Herwig/Particles/Z0/Z0->nu_tau,nu_taubar;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("W-Z-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Electron\n"
process+="insert SimpleQCD:MatrixElements[0] MEqq2W2ff\nset MEqq2W2ff:Process Electron\n"
elif(parameterName.find("W-Z-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Muon\n"
process+="insert SimpleQCD:MatrixElements[0] MEqq2W2ff\nset MEqq2W2ff:Process Muon\n"
elif(parameterName.find("W-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2W2ff\nset MEqq2W2ff:Process Electron\n"
elif(parameterName.find("W-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2W2ff\nset MEqq2W2ff:Process Muon\n"
elif(parameterName.find("Z-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Electron\n"
elif(parameterName.find("Z-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Muon\n"
elif(parameterName.find("Z-LowMass-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Electron\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 20.*GeV\nset /Herwig/Cuts/MassCut:MinM 20.*GeV\nset /Herwig/Cuts/MassCut:MaxM 70.*GeV\n"
elif(parameterName.find("Z-MedMass-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Electron\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 40.*GeV\nset /Herwig/Cuts/MassCut:MinM 40.*GeV\nset /Herwig/Cuts/MassCut:MaxM 130.*GeV\n"
elif(parameterName.find("Z-LowMass-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Muon\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 10.*GeV\nset /Herwig/Cuts/MassCut:MinM 10.*GeV\nset /Herwig/Cuts/MassCut:MaxM 70.*GeV\n"
elif(parameterName.find("W-Jet")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEWJet\nset MEWJet:WDecay Electron\n"
if(parameterName.find("W-Jet-1-e")>=0) :
process+="set /Herwig/Cuts/WBosonKtCut:MinKT 100.0*GeV\n"
parameterName=parameterName.replace("W-Jet-1-e","W-Jet-e")
elif(parameterName.find("W-Jet-2-e")>=0) :
process+="set /Herwig/Cuts/WBosonKtCut:MinKT 190.0*GeV\n"
parameterName=parameterName.replace("W-Jet-2-e","W-Jet-e")
elif(parameterName.find("W-Jet-3-e")>=0) :
process+="set /Herwig/Cuts/WBosonKtCut:MinKT 270.0*GeV\n"
parameterName=parameterName.replace("W-Jet-3-e","W-Jet-e")
elif(parameterName.find("Z-Jet")>=0) :
if(parameterName.find("-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEZJet\nset MEZJet:ZDecay Electron\n"
if(parameterName.find("Z-Jet-0-e")>=0) :
process+="set /Herwig/Cuts/ZBosonKtCut:MinKT 35.0*GeV\n"
parameterName=parameterName.replace("Z-Jet-0-e","Z-Jet-e")
elif(parameterName.find("Z-Jet-1-e")>=0) :
process+="set /Herwig/Cuts/ZBosonKtCut:MinKT 100.0*GeV\n"
parameterName=parameterName.replace("Z-Jet-1-e","Z-Jet-e")
elif(parameterName.find("Z-Jet-2-e")>=0) :
process+="set /Herwig/Cuts/ZBosonKtCut:MinKT 190.0*GeV\n"
parameterName=parameterName.replace("Z-Jet-2-e","Z-Jet-e")
elif(parameterName.find("Z-Jet-3-e")>=0) :
process+="set /Herwig/Cuts/ZBosonKtCut:MinKT 270.0*GeV\n"
parameterName=parameterName.replace("Z-Jet-3-e","Z-Jet-e")
else :
process+="insert SimpleQCD:MatrixElements[0] MEZJet\nset MEZJet:ZDecay Muon\n"
process+="set /Herwig/Cuts/ZBosonKtCut:MinKT 35.0*GeV\n"
parameterName=parameterName.replace("Z-Jet-0-mu","Z-Jet-mu")
else :
logging.error(" Process %s not supported for internal matrix elements" % name)
sys.exit(1)
elif(simulation=="Powheg") :
if(parameterName.find("8-VBF")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2HiggsVBF\n"
elif(parameterName.find("VBF")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2HiggsVBF\n"
elif(parameterName.find("ggHJet")>=0) :
logging.error(" Process %s not supported for POWHEG matrix elements" % name)
sys.exit(1)
elif(parameterName.find("8-ggH")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEHiggs\n"
elif(parameterName.find("ggH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEHiggs\n"
elif(parameterName.find("8-WH")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2WH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("8-ZH")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2ZH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("WH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->b,bbar;\n"
process+="do /Herwig/Particles/W+:SelectDecayModes W+->nu_e,e+; W+->nu_mu,mu+;\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2WH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("ZH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->b,bbar;\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes Z0->e-,e+; Z0->mu-,mu+;\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2ZH\n"
process+="set /Herwig/Cuts/JetKtCut:MinKT 0.0*GeV\n"
elif(parameterName.find("UE")>=0) :
logging.error(" Process %s not supported for powheg matrix elements" % name)
sys.exit(1)
elif(parameterName.find("WZ")>=0) :
process+="create Herwig::HwDecayHandler /Herwig/NewPhysics/DecayHandler\n"
process+="set /Herwig/NewPhysics/DecayHandler:NewStep No\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 0 /Herwig/Particles/tau-\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 1 /Herwig/Particles/tau+\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PreCascadeHandlers 0 /Herwig/NewPhysics/DecayHandler\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2VV\nset PowhegMEPP2VV:Process WZ\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+; /Herwig/Particles/W+/W+->nu_mu,mu+;\n"
process+="do /Herwig/Particles/W-:SelectDecayModes /Herwig/Particles/W-/W-->nu_ebar,e-; /Herwig/Particles/W-/W-->nu_mubar,mu-;\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("WW-emu")>=0) :
process+="create Herwig::HwDecayHandler /Herwig/NewPhysics/DecayHandler\n"
process+="set /Herwig/NewPhysics/DecayHandler:NewStep No\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 0 /Herwig/Particles/tau-\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 1 /Herwig/Particles/tau+\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PreCascadeHandlers 0 /Herwig/NewPhysics/DecayHandler\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2VV\nset PowhegMEPP2VV:Process WW\n"
process+="set /Herwig/Particles/W+:Synchronized 0\n"
process+="set /Herwig/Particles/W-:Synchronized 0\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+;\n"
process+="do /Herwig/Particles/W-:SelectDecayModes /Herwig/Particles/W-/W-->nu_mubar,mu-;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("WW-ll")>=0) :
process+="create Herwig::HwDecayHandler /Herwig/NewPhysics/DecayHandler\n"
process+="set /Herwig/NewPhysics/DecayHandler:NewStep No\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 0 /Herwig/Particles/tau-\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 1 /Herwig/Particles/tau+\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PreCascadeHandlers 0 /Herwig/NewPhysics/DecayHandler\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2VV\nset PowhegMEPP2VV:Process WW\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+; /Herwig/Particles/W+/W+->nu_mu,mu+; /Herwig/Particles/W+/W+->nu_tau,tau+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("ZZ-ll")>=0) :
process+="create Herwig::HwDecayHandler /Herwig/NewPhysics/DecayHandler\n"
process+="set /Herwig/NewPhysics/DecayHandler:NewStep No\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 0 /Herwig/Particles/tau-\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 1 /Herwig/Particles/tau+\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PreCascadeHandlers 0 /Herwig/NewPhysics/DecayHandler\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2VV\nset PowhegMEPP2VV:Process ZZ\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+; /Herwig/Particles/Z0/Z0->tau-,tau+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("ZZ-lv")>=0) :
process+="create Herwig::HwDecayHandler /Herwig/NewPhysics/DecayHandler\n"
process+="set /Herwig/NewPhysics/DecayHandler:NewStep No\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 0 /Herwig/Particles/tau-\n"
process+="insert /Herwig/NewPhysics/DecayHandler:Excluded 1 /Herwig/Particles/tau+\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PreCascadeHandlers 0 /Herwig/NewPhysics/DecayHandler\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEPP2VV\nset PowhegMEPP2VV:Process ZZ\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+; /Herwig/Particles/Z0/Z0->tau-,tau+; /Herwig/Particles/Z0/Z0->nu_e,nu_ebar; /Herwig/Particles/Z0/Z0->nu_mu,nu_mubar; /Herwig/Particles/Z0/Z0->nu_tau,nu_taubar;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("W-Z-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Electron\n"
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2W2ff\nset PowhegMEqq2W2ff:Process Electron\n"
elif(parameterName.find("W-Z-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] MEqq2gZ2ff\nset MEqq2gZ2ff:Process Muon\n"
process+="insert SimpleQCD:MatrixElements[0] MEqq2W2ff\nset MEqq2W2ff:Process Muon\n"
elif(parameterName.find("W-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2W2ff\nset PowhegMEqq2W2ff:Process Electron\n"
elif(parameterName.find("W-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2W2ff\nset PowhegMEqq2W2ff:Process Muon\n"
elif(parameterName.find("Z-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Electron\n"
elif(parameterName.find("Z-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Muon\n"
elif(parameterName.find("Z-LowMass-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Electron\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 20.*GeV\nset /Herwig/Cuts/MassCut:MinM 20.*GeV\nset /Herwig/Cuts/MassCut:MaxM 70.*GeV\n"
elif(parameterName.find("Z-MedMass-e")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Electron\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 40.*GeV\nset /Herwig/Cuts/MassCut:MinM 40.*GeV\nset /Herwig/Cuts/MassCut:MaxM 130.*GeV\n"
elif(parameterName.find("Z-LowMass-mu")>=0) :
process+="insert SimpleQCD:MatrixElements[0] PowhegMEqq2gZ2ff\nset PowhegMEqq2gZ2ff:Process Muon\n"
process+="set /Herwig/Cuts/QCDCuts:MHatMin 10.*GeV\nset /Herwig/Cuts/MassCut:MinM 10.*GeV\nset /Herwig/Cuts/MassCut:MaxM 70.*GeV\n"
+ elif(parameterName.find("DiPhoton-GammaGamma")>=0) :
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaGammaPowheg\n"
+ process+="set MEGammaGammaPowheg:Process GammaGamma\n"
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaGamma\n"
+ process+="set MEGammaGamma:Process gg\n"
+ process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ process+="set /Herwig/Cuts/JetKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaGamma","")
+ elif(parameterName.find("DiPhoton-GammaJet")>=0) :
+ process+="insert SimpleQCD:MatrixElements[0] MEGammaGammaPowheg\n"
+ process+="set MEGammaGammaPowheg:Process VJet\n"
+ process+="set /Herwig/Cuts/PhotonKtCut:MinKT 5.\n"
+ process+="set /Herwig/Cuts/JetKtCut:MinKT 5.\n"
+ parameterName=parameterName.replace("-GammaJet","")
else :
logging.error(" Process %s not supported for internal POWHEG matrix elements" % name)
sys.exit(1)
elif(simulation=="Matchbox" ) :
if(parameterName.find("8-VBF")>=0) :
parameters["nlo"] = "read Matchbox/VBFNLO.in\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 3\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/Z0\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/W+\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/W-\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/gamma\n"
process+="do Factory:DiagramGenerator:TimeLikeRange 0 0\n"
process+="do Factory:Process p p h0 j j\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 125.7\n"
elif(parameterName.find("VBF")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
parameters["nlo"] = "read Matchbox/VBFNLO.in\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 3\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/Z0\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/W+\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/W-\n"
process+="insert Factory:DiagramGenerator:RestrictLines 0 /Herwig/Particles/gamma\n"
process+="do Factory:DiagramGenerator:TimeLikeRange 0 0\n"
process+="do Factory:Process p p h0 j j\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 125.7\n"
elif(parameterName.find("ggHJet")>=0) :
parameters["nlo"] = "read Matchbox/MadGraph-GoSam.in\nread Matchbox/HiggsEffective.in\n"
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
process+="set Factory:OrderInAlphaS 3\nset Factory:OrderInAlphaEW 1\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="do Factory:Process p p h0 j\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 125.7\n"
elif(parameterName.find("8-ggH")>=0) :
parameters["nlo"] = "read Matchbox/MadGraph-GoSam.in\nread Matchbox/HiggsEffective.in\n"
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 1\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="do Factory:Process p p h0\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 125.7\n"
elif(parameterName.find("ggH")>=0) :
parameters["nlo"] = "read Matchbox/MadGraph-GoSam.in\nread Matchbox/HiggsEffective.in\n"
process+="do /Herwig/Particles/h0:SelectDecayModes h0->tau-,tau+;\n"
process+="set /Herwig/Particles/tau-:Stable Stable\n"
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 1\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="do Factory:Process p p h0\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 125.7\n"
elif(parameterName.find("8-WH")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="do Factory:Process p p W+ h0\n"
process+="do Factory:Process p p W- h0\n"
process+="set /Herwig/Particles/W+:HardProcessWidth 0.\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 125.7\n"
elif(parameterName.find("8-ZH")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="set /Herwig/Particles/Z0:HardProcessWidth 0.\n"
process+="do Factory:Process p p Z0 h0\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 125.7\n"
elif(parameterName.find("WH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->b,bbar;\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 3\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="do Factory:Process p p e+ nu h0\n"
process+="do Factory:Process p p e- nu h0\n"
process+="do Factory:Process p p mu+ nu h0\n"
process+="do Factory:Process p p mu- nu h0\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("ZH")>=0) :
process+="do /Herwig/Particles/h0:SelectDecayModes h0->b,bbar;\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 3\n"
process+="set /Herwig/Particles/h0:HardProcessWidth 0.\n"
process+="do Factory:Process p p e+ e- h0\n"
process+="do Factory:Process p p mu+ mu- h0\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("UE")>=0) :
logging.error(" Process %s not supported for Matchbox matrix elements" % name)
sys.exit(1)
elif(parameterName.find("7-Jets")>=0) :
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 0\n"
process+="do Factory:Process p p j j\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/MaxJetPtScale\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
if(parameterName.find("7-Jets-0")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 5.\n"
elif(parameterName.find("7-Jets-10")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 200.*GeV\n"
elif(parameterName.find("7-Jets-11")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 600.*GeV\n"
elif(parameterName.find("7-Jets-12")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 1000.*GeV\n"
elif(parameterName.find("7-Jets-13")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 1600.*GeV\n"
elif(parameterName.find("7-Jets-14")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 2200.*GeV\n"
elif(parameterName.find("7-Jets-15")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 2800.*GeV\n"
elif(parameterName.find("7-Jets-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 10.\n"
elif(parameterName.find("7-Jets-2")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 20.\n"
elif(parameterName.find("7-Jets-3")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 40.\n"
elif(parameterName.find("7-Jets-4")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 70.\n"
elif(parameterName.find("7-Jets-5")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 150.\n"
elif(parameterName.find("7-Jets-6")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 200.\n"
elif(parameterName.find("7-Jets-7")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 300.\n"
elif(parameterName.find("7-Jets-8")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 500.\n"
elif(parameterName.find("7-Jets-9")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 20.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 90.*GeV\n"
elif(parameterName.find("7-Charm")>=0 or \
parameterName.find("7-Bottom")>=0) :
parameters["bscheme"]="read Matchbox/FourFlavourScheme.in"
process+="set /Herwig/Particles/b:HardProcessMass 4.2*GeV\n"
process+="set /Herwig/Particles/bbar:HardProcessMass 4.2*GeV\n"
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 0\n"
if(parameterName.find("7-Bottom")>=0) :
process+="do Factory:Process p p b bbar\n"
else:
process+="do Factory:Process p p c cbar\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/MaxJetPtScale\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/UnderlyingEvent/MPIHandler:IdenticalToUE 0\n"
if(parameterName.find("-0")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 0.\n"
elif(parameterName.find("-1")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 5.\n"
elif(parameterName.find("-2")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 20.\n"
elif(parameterName.find("-3")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 50.\n"
elif(parameterName.find("-4")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 80.\n"
elif(parameterName.find("-5")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 110.\n"
elif(parameterName.find("-6")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 90.*GeV\n"
elif(parameterName.find("-7")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 340.*GeV\n"
elif(parameterName.find("-8")>=0) :
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 25.\n"
process+="create ThePEG::JetPairRegion /Herwig/Cuts/JetPairMass JetCuts.so\n"
process+="set /Herwig/Cuts/JetPairMass:FirstRegion /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/JetPairMass:SecondRegion /Herwig/Cuts/SecondJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetPairRegions 0 /Herwig/Cuts/JetPairMass\n"
process+="set /Herwig/Cuts/JetPairMass:MassMin 500.*GeV\n"
elif(parameterName.find("7-Top-L")>=0) :
process+="set /Herwig/Particles/t:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/tbar:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 0\n"
process+="do Factory:Process p p t tbar\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/TopPairMTScale\n"
process+="do /Herwig/Particles/t:SelectDecayModes t->nu_e,e+,b; t->nu_mu,mu+,b;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("7-Top-SL")>=0) :
process+="set /Herwig/Particles/t:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/tbar:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 0\n"
process+="do Factory:Process p p t tbar\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/TopPairMTScale\n"
process+="set /Herwig/Particles/t:Synchronized Not_synchronized\n"
process+="set /Herwig/Particles/tbar:Synchronized Not_synchronized\n"
process+="do /Herwig/Particles/t:SelectDecayModes t->nu_e,e+,b; t->nu_mu,mu+,b;\n"
process+="do /Herwig/Particles/tbar:SelectDecayModes tbar->b,bbar,cbar; tbar->bbar,cbar,d; tbar->bbar,cbar,s; tbar->bbar,s,ubar; tbar->bbar,ubar,d;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
elif(parameterName.find("7-Top-All")>=0) :
process+="set /Herwig/Particles/t:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/tbar:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 0\n"
process+="do Factory:Process p p t tbar\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/TopPairMTScale\n"
elif(parameterName.find("WZ")>=0) :
process+="set /Herwig/Particles/W+:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/W-:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/Z0:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p W+ Z0\ndo Factory:Process p p W- Z0\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 171.6*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+; /Herwig/Particles/W+/W+->nu_mu,mu+;\n"
process+="do /Herwig/Particles/W-:SelectDecayModes /Herwig/Particles/W-/W-->nu_ebar,e-; /Herwig/Particles/W-/W-->nu_mubar,mu-;\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("WW-emu")>=0) :
process+="set /Herwig/Particles/W+:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/W-:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/Z0:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p W+ W-\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 160.8*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/Particles/W+:Synchronized 0\n"
process+="set /Herwig/Particles/W-:Synchronized 0\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+;\n"
process+="do /Herwig/Particles/W-:SelectDecayModes /Herwig/Particles/W-/W-->nu_mubar,mu-;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("WW-ll")>=0) :
process+="set /Herwig/Particles/W+:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/W-:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/Z0:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p W+ W-\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 160.8*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="do /Herwig/Particles/W+:SelectDecayModes /Herwig/Particles/W+/W+->nu_e,e+; /Herwig/Particles/W+/W+->nu_mu,mu+; /Herwig/Particles/W+/W+->nu_tau,tau+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("ZZ-ll")>=0) :
process+="set /Herwig/Particles/W+:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/W-:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/Z0:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p Z0 Z0\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 182.2*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+; /Herwig/Particles/Z0/Z0->tau-,tau+;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("ZZ-lv")>=0) :
process+="set /Herwig/Particles/W+:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/W-:HardProcessWidth 0.*GeV\n"
process+="set /Herwig/Particles/Z0:HardProcessWidth 0.*GeV\n"
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p Z0 Z0\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 182.2*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="do /Herwig/Particles/Z0:SelectDecayModes /Herwig/Particles/Z0/Z0->e-,e+; /Herwig/Particles/Z0/Z0->mu-,mu+; /Herwig/Particles/Z0/Z0->tau-,tau+; /Herwig/Particles/Z0/Z0->nu_e,nu_ebar; /Herwig/Particles/Z0/Z0->nu_mu,nu_mubar; /Herwig/Particles/Z0/Z0->nu_tau,nu_taubar;\n"
process+="create Herwig::BranchingRatioReweighter /Herwig/Generators/BRReweighter\n"
process+="insert /Herwig/Generators/EventGenerator:EventHandler:PostHadronizationHandlers 0 /Herwig/Generators/BRReweighter\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("W-Z-e")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\n"
process+="do Factory:Process p p e+ e-\ndo Factory:Process p p e+ nu\ndo Factory:Process p p e- nu\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("W-Z-mu")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\n"
process+="do Factory:Process p p mu+ mu-\ndo Factory:Process p p mu+ nu\ndo Factory:Process p p mu- nu\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("W-e")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p e+ nu\ndo Factory:Process p p e- nu\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("W-mu")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p mu+ nu\ndo Factory:Process p p mu- nu\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Z-e")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p e+ e-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Z-mu")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p mu+ mu-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Z-jj")>=0) :
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 2\n"
process+="do Factory:Process p p e+ e- j j\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 40.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Z-LowMass-e")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p e+ e-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 20*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 70*GeV\n"
elif(parameterName.find("Z-MedMass-e")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p e+ e-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 40*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 130*GeV\n"
elif(parameterName.find("Z-LowMass-mu")>=0) :
process+="set Factory:OrderInAlphaS 0\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p mu+ mu-\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/LeptonPairMassScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 10*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 70*GeV\n"
elif(parameterName.find("W-Jet")>=0) :
process+="set Factory:OrderInAlphaS 1\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p e+ nu j\ndo Factory:Process p p e- nu j\n\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/HTScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
if(parameterName.find("W-Jet-1-e")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 100.*GeV\n"
parameterName=parameterName.replace("W-Jet-1-e","W-Jet-e")
elif(parameterName.find("W-Jet-2-e")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 190.0*GeV\n"
parameterName=parameterName.replace("W-Jet-2-e","W-Jet-e")
elif(parameterName.find("W-Jet-3-e")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 270.0*GeV\n"
parameterName=parameterName.replace("W-Jet-3-e","W-Jet-e")
elif(parameterName.find("Z-Jet")>=0) :
process+="set Factory:OrderInAlphaS 1\nset Factory:OrderInAlphaEW 2\n"
if(parameterName.find("-e")>=0) :
process+="do Factory:Process p p e+ e- j\n"
if(parameterName.find("Z-Jet-0-e")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 35.*GeV\n"
parameterName=parameterName.replace("Z-Jet-0-e","Z-Jet-e")
elif(parameterName.find("Z-Jet-1-e")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 100.*GeV\n"
parameterName=parameterName.replace("Z-Jet-1-e","Z-Jet-e")
elif(parameterName.find("Z-Jet-2-e")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 190.0*GeV\n"
parameterName=parameterName.replace("Z-Jet-2-e","Z-Jet-e")
elif(parameterName.find("Z-Jet-3-e")>=0) :
process+="set /Herwig/Cuts/FirstJet:PtMin 270.0*GeV\n"
parameterName=parameterName.replace("Z-Jet-3-e","Z-Jet-e")
else :
process+="do Factory:Process p p mu+ mu- j\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 35.*GeV\n"
parameterName=parameterName.replace("Z-Jet-0-mu","Z-Jet-mu")
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
process+="set Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/HTScale\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
elif(parameterName.find("Z-bb")>=0) :
parameters["bscheme"]="read Matchbox/FourFlavourScheme.in"
process+="set /Herwig/Particles/b:HardProcessMass 4.2*GeV\nset /Herwig/Particles/bbar:HardProcessMass 4.2*GeV\n"
process+="set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p e+ e- b bbar\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 91.2*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 66*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 116*GeV\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/SecondJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 18.*GeV\n"
process+="set /Herwig/Cuts/SecondJet:PtMin 15.*GeV\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
elif(parameterName.find("Z-b")>=0) :
process+="do Factory:StartParticleGroup bjet\n"
process+="insert Factory:ParticleGroup 0 /Herwig/Particles/b\n"
process+="insert Factory:ParticleGroup 0 /Herwig/Particles/bbar\n"
process+="do Factory:EndParticleGroup\n"
process+="set Factory:OrderInAlphaS 1\nset Factory:OrderInAlphaEW 2\ndo Factory:Process p p e+ e- bjet\n"
process+="set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 91.2*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 15.*GeV\n"
elif(parameterName.find("W-b")>=0) :
parameters["bscheme"]="read Matchbox/FourFlavourScheme.in"
process += "set /Herwig/Particles/b:HardProcessMass 4.2*GeV\nset /Herwig/Particles/bbar:HardProcessMass 4.2*GeV\n"
process += "set Factory:OrderInAlphaS 2\nset Factory:OrderInAlphaEW 2\n"
process += "do Factory:Process p p e+ nu b bbar\ndo Factory:Process p p e- nu b bbar\n"
process += "do Factory:Process p p mu+ nu b bbar\ndo Factory:Process p p mu- nu b bbar\n"
process += "set /Herwig/MatrixElements/Matchbox/Scales/FixedScale:FixedScale 80.4*GeV\nset Factory:ScaleChoice /Herwig/MatrixElements/Matchbox/Scales/FixedScale\n"
process+="set /Herwig/Cuts/Cuts:JetFinder /Herwig/Cuts/JetFinder\n"
process+="insert /Herwig/Cuts/Cuts:MultiCuts 0 /Herwig/Cuts/JetCuts\n"
process+="insert /Herwig/Cuts/JetCuts:JetRegions 0 /Herwig/Cuts/FirstJet\n"
process+="set /Herwig/Cuts/FirstJet:PtMin 30.*GeV\n"
process+="set /Herwig/Cuts/LeptonPairMassCut:MinMass 60*GeV\nset /Herwig/Cuts/LeptonPairMassCut:MaxMass 120*GeV\n"
else :
logging.error(" Process %s not supported for Matchbox matrix elements" % name)
sys.exit(1)
# Star
elif(collider=="LHC-GammaGamma" ) :
if(parameterName.find("-7-")>=0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 7000.0\n"
elif(parameterName.find("-8-")>=0) :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 8000.0\n"
else :
process="set /Herwig/Generators/EventGenerator:EventHandler:LuminosityFunction:Energy 7000.0\n"
if(simulation=="") :
if(parameterName.find("7")>=0) :
process += "insert SimpleQCD:MatrixElements 0 /Herwig/MatrixElements/MEgg2ff\n"
process += "set /Herwig/MatrixElements/MEgg2ff:Process Muon\n"
else :
logging.error(" Process %s not supported for default matrix elements" % name)
sys.exit(1)
else :
logging.error("LHC-GammaGamma not supported for %s " % simulation)
sys.exit(1)
parameters['parameterFile'] = os.path.join(collider,collider+"-"+parameterName+".in")
parameters['runname'] = name
parameters['process'] = process
# write the file
if(simulation=="Matchbox" ) :
with open(os.path.join("Rivet",name+".in") ,'w') as f:
f.write( template.substitute(parameters))
else :
with open(os.path.join("Rivet",name+".in") ,'w') as f:
f.write( template.substitute(parameters))
diff --git a/Tests/python/merge-LHC-Photon b/Tests/python/merge-LHC-Photon
--- a/Tests/python/merge-LHC-Photon
+++ b/Tests/python/merge-LHC-Photon
@@ -1,252 +1,265 @@
#! /usr/bin/env python
import logging
import sys
import os, yoda
"""%prog
Script for merging aida files
"""
def fillAbove(scale,desthisto, sourcehistosbyptmin):
pthigh= 1e100
ptlow =-1e100
for pt, h in sorted(sourcehistosbyptmin.iteritems(),reverse=True):
ptlow=pt
if(type(desthisto)==yoda.core.Scatter2D) :
for i in range(0,h.numPoints) :
xMin = h.points[i].x-h.points[i].xErrs.minus
if( xMin*scale >= ptlow and
xMin*scale < pthigh ) :
desthisto.addPoint(h.points[i])
elif(type(desthisto)==yoda.core.Profile1D) :
for i in range(0,h.numBins) :
if(h.bins[i].xMin*scale >= ptlow and
h.bins[i].xMin*scale < pthigh ) :
desthisto.bins[i] += h.bins[i]
elif(type(desthisto)==yoda.core.Histo1D) :
for i in range(0,h.numBins) :
if(h.bins[i].xMin*scale >= ptlow and
h.bins[i].xMin*scale < pthigh ) :
desthisto.bins[i] += h.bins[i]
else :
logging.error("Can't merge %s, unknown type" % desthisto.path)
sys.exit(1)
pthigh=pt
def mergeByPt(hpath, scale=1.):
global inhistos
global outhistos
try:
fillAbove(scale,outhistos[hpath], inhistos[hpath])
except:
pass
def useOnePt(hpath, ptmin):
global inhistos
global outhistos
try:
## Find best pT_min match
ptmins = inhistos[hpath].keys()
closest_ptmin = None
for ptm in ptmins:
if closest_ptmin is None or \
abs(ptm-float(ptmin)) < abs(closest_ptmin-float(ptmin)):
closest_ptmin = ptm
if closest_ptmin != float(ptmin):
logging.warning("Inexact match for requested pTmin=%s: " % ptmin + \
"using pTmin=%e instead" % closest_ptmin)
outhistos[hpath] = inhistos[hpath][closest_ptmin]
except:
pass
if sys.version_info[:3] < (2,4,0):
print "rivet scripts require Python version >= 2.4.0... exiting"
sys.exit(1)
if __name__ == "__main__":
import logging
from optparse import OptionParser, OptionGroup
parser = OptionParser(usage="%prog aidafile aidafile2 [...]")
parser.add_option("-o", "--out", dest="OUTFILE", default="-")
verbgroup = OptionGroup(parser, "Verbosity control")
verbgroup.add_option("-v", "--verbose", action="store_const", const=logging.DEBUG, dest="LOGLEVEL",
default=logging.INFO, help="print debug (very verbose) messages")
verbgroup.add_option("-q", "--quiet", action="store_const", const=logging.WARNING, dest="LOGLEVEL",
default=logging.INFO, help="be very quiet")
parser.add_option_group(verbgroup)
(opts, args) = parser.parse_args()
logging.basicConfig(level=opts.LOGLEVEL, format="%(message)s")
+ ## Check args
+ if len(args) < 1:
+ logging.error("Must specify at least the name of the files")
+ sys.exit(1)
+
files=["-7-PromptPhoton-1.yoda","-7-PromptPhoton-2.yoda",
"-7-PromptPhoton-3.yoda","-7-PromptPhoton-4.yoda",
- "-7-DiPhoton.yoda","-GammaGamma-7.yoda"]
+ "-7-DiPhoton-GammaGamma.yoda","-7-DiPhoton-GammaJet.yoda","-GammaGamma-7.yoda"]
## Get histos
inhistos = {}
outhistos={}
for f in files:
- file="LHC"+f
+ file=args[0]+f
if not os.access(file, os.R_OK):
logging.error("%s can not be read" % file)
- break
+ continue
try:
aos = yoda.read(file)
except:
logging.error("%s can not be parsed as XML" % file)
break
if(file.find("PromptPhoton")>=0) :
if(file.find("-7-PromptPhoton-1")>0) :
ptmin=0.
elif(file.find("-7-PromptPhoton-2")>0) :
ptmin=35.
elif(file.find("-7-PromptPhoton-3")>0) :
ptmin=90.
elif(file.find("-7-PromptPhoton-4")>0) :
ptmin=170.
## Get histos from this YODA file
for aopath, ao in aos.iteritems() :
if not inhistos.has_key(aopath):
inhistos[aopath] = {}
if (aopath.find("CMS_2013_I1258128")>0) :
if(aopath.find("d05")>0 or aopath.find("d06")>0 or
aopath.find("d07")>0 or aopath.find("d08")>0) :
inhistos[aopath][ptmin] = ao
else :
inhistos[aopath][ptmin] = ao
else :
## Get histos from this YODA file
for aopath, ao in aos.iteritems() :
- outhistos[aopath] = ao
-
+ if(aopath.find("XSEC")>=0 or aopath.find("EVTCOUNT")>=0) : continue
+ print aopath
+ if ( aopath in outhistos ) :
+ aotype = type(ao)
+ if aotype in (yoda.Counter, yoda.Histo1D, yoda.Histo2D, yoda.Profile1D, yoda.Profile2D):
+ outhistos[aopath] += ao
+ else :
+ quit()
+ else:
+ outhistos[aopath] = ao
for hpath,hsets in inhistos.iteritems():
if( hpath.find("1263495")>0 or
hpath.find("1093738")>0 or
hpath.find("921594")>0 or
hpath.find("8914702")>0 or
hpath.find("1244522")>0 ) :
if(type(hsets.values()[0])==yoda.core.Scatter2D) :
outhistos[hpath] = yoda.core.Scatter2D(hsets.values()[0].path,
hsets.values()[0].title)
elif(type(hsets.values()[0])==yoda.core.Profile1D) :
outhistos[hpath] = yoda.core.Profile1D(hsets.values()[0].path,
hsets.values()[0].title)
for i in range(0,hsets.values()[0].numBins) :
outhistos[hpath].addBin(hsets.values()[0].bins[i].xMin,
hsets.values()[0].bins[i].xMax)
elif(type(hsets.values()[0])==yoda.core.Histo1D) :
outhistos[hpath] = yoda.core.Histo1D(hsets.values()[0].path,
hsets.values()[0].title)
for i in range(0,hsets.values()[0].numBins) :
outhistos[hpath].addBin(hsets.values()[0].bins[i].xMin,
hsets.values()[0].bins[i].xMax)
else :
logging.error("Histogram %s is of unknown type" % hpath)
print hpath,type(hsets.values()[0])
sys.exit(1)
logging.info("Processing ATLAS_2013_I1263495")
mergeByPt("/ATLAS_2013_I1263495/d01-x01-y01")
mergeByPt("/ATLAS_2013_I1263495/d01-x01-y03")
useOnePt("/ATLAS_2013_I1263495/d01-x02-y01", "90" )
logging.info("Processing ATLAS_2012_I1093738")
mergeByPt("/ATLAS_2012_I1093738/d01-x01-y01")
mergeByPt("/ATLAS_2012_I1093738/d02-x01-y01")
mergeByPt("/ATLAS_2012_I1093738/d03-x01-y01")
mergeByPt("/ATLAS_2012_I1093738/d04-x01-y01")
mergeByPt("/ATLAS_2012_I1093738/d05-x01-y01")
mergeByPt("/ATLAS_2012_I1093738/d06-x01-y01")
logging.info("Processing ATLAS_2011_I921594")
mergeByPt("/ATLAS_2011_I921594/d01-x01-y01")
mergeByPt("/ATLAS_2011_I921594/d01-x01-y02")
mergeByPt("/ATLAS_2011_I921594/d01-x01-y04")
mergeByPt("/ATLAS_2011_I921594/d01-x01-y05")
logging.info("Processing ATLAS_2010_S8914702")
mergeByPt("/ATLAS_2010_S8914702/d01-x01-y01")
mergeByPt("/ATLAS_2010_S8914702/d01-x01-y02")
mergeByPt("/ATLAS_2010_S8914702/d01-x01-y03")
logging.info("Processing CMS_2013_I1258128")
useOnePt("/CMS_2013_I1258128/d05-x01-y01", "35" )
useOnePt("/CMS_2013_I1258128/d06-x01-y01", "35" )
useOnePt("/CMS_2013_I1258128/d07-x01-y01", "35" )
useOnePt("/CMS_2013_I1258128/d08-x01-y01", "35" )
logging.info("Processing ATLAS_2013_I1244522")
mergeByPt("/ATLAS_2013_I1244522/d01-x01-y01")
mergeByPt("/ATLAS_2013_I1244522/d02-x01-y01")
useOnePt("/ATLAS_2013_I1244522/d03-x01-y01", "35" )
useOnePt("/ATLAS_2013_I1244522/d04-x01-y01", "35" )
useOnePt("/ATLAS_2013_I1244522/d05-x01-y01", "35" )
useOnePt("/ATLAS_2013_I1244522/d06-x01-y01", "35" )
useOnePt("/ATLAS_2013_I1244522/d07-x01-y01", "35" )
logging.info("Processing /MC_PHOTONJETS")
useOnePt("/MC_PHOTONJETS/jet_HT","0")
useOnePt("/MC_PHOTONJETS/jet_eta_1","0")
useOnePt("/MC_PHOTONJETS/jet_eta_2","0")
useOnePt("/MC_PHOTONJETS/jet_eta_3","0")
useOnePt("/MC_PHOTONJETS/jet_eta_4","0")
useOnePt("/MC_PHOTONJETS/jet_eta_pmratio_1","0")
useOnePt("/MC_PHOTONJETS/jet_eta_pmratio_2","0")
useOnePt("/MC_PHOTONJETS/jet_eta_pmratio_3","0")
useOnePt("/MC_PHOTONJETS/jet_eta_pmratio_4","0")
useOnePt("/MC_PHOTONJETS/jet_mass_1","0")
useOnePt("/MC_PHOTONJETS/jet_mass_2","0")
useOnePt("/MC_PHOTONJETS/jet_mass_3","0")
useOnePt("/MC_PHOTONJETS/jet_mass_4","0")
useOnePt("/MC_PHOTONJETS/jet_multi_exclusive","0")
useOnePt("/MC_PHOTONJETS/jet_multi_inclusive","0")
useOnePt("/MC_PHOTONJETS/jet_multi_ratio","0")
useOnePt("/MC_PHOTONJETS/jet_pT_1","0")
useOnePt("/MC_PHOTONJETS/jet_pT_2","0")
useOnePt("/MC_PHOTONJETS/jet_pT_3","0")
useOnePt("/MC_PHOTONJETS/jet_pT_4","0")
useOnePt("/MC_PHOTONJETS/jet_y_1","0")
useOnePt("/MC_PHOTONJETS/jet_y_2","0")
useOnePt("/MC_PHOTONJETS/jet_y_3","0")
useOnePt("/MC_PHOTONJETS/jet_y_4","0")
useOnePt("/MC_PHOTONJETS/jet_y_pmratio_1","0")
useOnePt("/MC_PHOTONJETS/jet_y_pmratio_2","0")
useOnePt("/MC_PHOTONJETS/jet_y_pmratio_3","0")
useOnePt("/MC_PHOTONJETS/jet_y_pmratio_4","0")
useOnePt("/MC_PHOTONJETS/jets_dR_12","0")
useOnePt("/MC_PHOTONJETS/jets_dR_13","0")
useOnePt("/MC_PHOTONJETS/jets_dR_23","0")
useOnePt("/MC_PHOTONJETS/jets_deta_12","0")
useOnePt("/MC_PHOTONJETS/jets_deta_13","0")
useOnePt("/MC_PHOTONJETS/jets_deta_23","0")
useOnePt("/MC_PHOTONJETS/jets_dphi_12","0")
useOnePt("/MC_PHOTONJETS/jets_dphi_13","0")
useOnePt("/MC_PHOTONJETS/jets_dphi_23","0")
useOnePt("/MC_PHOTONJETS/photon_jet1_dR","0")
useOnePt("/MC_PHOTONJETS/photon_jet1_deta","0")
useOnePt("/MC_PHOTONJETS/photon_jet1_dphi","0")
useOnePt("/MC_PHOTONJETUE/gammajet-dR","0")
useOnePt("/MC_PHOTONJETUE/gammajet-dphi","0")
useOnePt("/MC_PHOTONJETUE/trans-maxnchg-gamma","0")
useOnePt("/MC_PHOTONJETUE/trans-maxnchg-jet","0")
useOnePt("/MC_PHOTONJETUE/trans-maxptsum-gamma","0")
useOnePt("/MC_PHOTONJETUE/trans-maxptsum-jet","0")
useOnePt("/MC_PHOTONJETUE/trans-minnchg-gamma","0")
useOnePt("/MC_PHOTONJETUE/trans-minnchg-jet","0")
useOnePt("/MC_PHOTONJETUE/trans-minptsum-gamma","0")
useOnePt("/MC_PHOTONJETUE/trans-minptsum-jet","0")
useOnePt("/MC_PHOTONJETUE/trans-nchg-gamma","0")
useOnePt("/MC_PHOTONJETUE/trans-nchg-jet","0")
useOnePt("/MC_PHOTONJETUE/trans-ptavg-gamma","0")
useOnePt("/MC_PHOTONJETUE/trans-ptavg-jet","0")
useOnePt("/MC_PHOTONJETUE/trans-ptsum-gamma","0")
useOnePt("/MC_PHOTONJETUE/trans-ptsum-jet","0")
# Choose output file
yoda.writeYODA(outhistos,opts.OUTFILE)
sys.exit(0)
diff --git a/Tests/python/merge-TVT-Photon b/Tests/python/merge-TVT-Photon
new file mode 100644
--- /dev/null
+++ b/Tests/python/merge-TVT-Photon
@@ -0,0 +1,65 @@
+#! /usr/bin/env python
+import logging
+import sys
+import os, yoda
+
+"""%prog
+
+Script for merging aida files
+
+"""
+
+if sys.version_info[:3] < (2,4,0):
+ print "rivet scripts require Python version >= 2.4.0... exiting"
+ sys.exit(1)
+
+if __name__ == "__main__":
+ import logging
+ from optparse import OptionParser, OptionGroup
+ parser = OptionParser(usage="%prog aidafile aidafile2 [...]")
+ parser.add_option("-o", "--out", dest="OUTFILE", default="-")
+ verbgroup = OptionGroup(parser, "Verbosity control")
+ verbgroup.add_option("-v", "--verbose", action="store_const", const=logging.DEBUG, dest="LOGLEVEL",
+ default=logging.INFO, help="print debug (very verbose) messages")
+ verbgroup.add_option("-q", "--quiet", action="store_const", const=logging.WARNING, dest="LOGLEVEL",
+ default=logging.INFO, help="be very quiet")
+ parser.add_option_group(verbgroup)
+ (opts, args) = parser.parse_args()
+ logging.basicConfig(level=opts.LOGLEVEL, format="%(message)s")
+
+ ## Check args
+ if len(args) < 1:
+ logging.error("Must specify at least the name of the files")
+ sys.exit(1)
+
+files=["-Run-II-PromptPhoton.yoda",
+ "-Run-II-DiPhoton-GammaGamma.yoda","-Run-II-DiPhoton-GammaJet.yoda"]
+
+## Get histos
+inhistos = {}
+outhistos={}
+for f in files:
+ file=args[0]+f
+ if not os.access(file, os.R_OK):
+ logging.error("%s can not be read" % file)
+ continue
+ try:
+ aos = yoda.read(file)
+ except:
+ logging.error("%s can not be parsed as XML" % file)
+ break
+ ## Get histos from this YODA file
+ for aopath, ao in aos.iteritems() :
+ if(aopath.find("XSEC")>=0 or aopath.find("EVTCOUNT")>=0) : continue
+ if ( aopath in outhistos ) :
+ aotype = type(ao)
+ if aotype in (yoda.Counter, yoda.Histo1D, yoda.Histo2D, yoda.Profile1D, yoda.Profile2D):
+ outhistos[aopath] += ao
+ else :
+ quit()
+ else:
+ outhistos[aopath] = ao
+
+# Choose output file
+yoda.writeYODA(outhistos,opts.OUTFILE)
+sys.exit(0)
diff --git a/src/defaults/MatrixElements.in b/src/defaults/MatrixElements.in
--- a/src/defaults/MatrixElements.in
+++ b/src/defaults/MatrixElements.in
@@ -1,254 +1,261 @@
# -*- ThePEG-repository -*-
##############################################################################
# Setup of default matrix elements.
#
# Only one ME is activated by default, but this file lists
# some alternatives. All available MEs can be found in the
# 'include/Herwig/MatrixElements' subdirectory of your Herwig
# installation.
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# Instead of editing this file directly, you should reset
# the matrix elements in your own input files:
#
# - create your custom SubProcessHandler
# - insert the MEs you need
# - set your SubProcessHandler instead of the default (see HerwigDefaults.in)
##############################################################################
mkdir /Herwig/MatrixElements
cd /Herwig/MatrixElements
library HwMELepton.so
library HwMEHadron.so
library HwMEDIS.so
############################################################
# e+e- matrix elements
############################################################
# e+e- > q qbar
create Herwig::MEee2gZ2qq MEee2gZ2qq
newdef MEee2gZ2qq:MinimumFlavour 1
newdef MEee2gZ2qq:MaximumFlavour 5
newdef MEee2gZ2qq:AlphaQCD /Herwig/Shower/AlphaQCD
newdef MEee2gZ2qq:AlphaQED /Herwig/Shower/AlphaQED
# e+e- -> l+l-
create Herwig::MEee2gZ2ll MEee2gZ2ll
newdef MEee2gZ2ll:Allowed Charged
set MEee2gZ2ll:AlphaQED /Herwig/Shower/AlphaQED
# e+e- -> W+W- ZZ
create Herwig::MEee2VV MEee2VV
# e+e- -> ZH
create Herwig::MEee2ZH MEee2ZH
newdef MEee2ZH:Coupling /Herwig/Shower/AlphaQCD
# e+e- -> e+e-H/nu_enu_ebarH
create Herwig::MEee2HiggsVBF MEee2HiggsVBF
############################################################
# NLO (POWHEG e+e- matrix elements
############################################################
library HwPowhegMELepton.so
create Herwig::MEee2gZ2qqPowheg PowhegMEee2gZ2qq
newdef PowhegMEee2gZ2qq:MinimumFlavour 1
newdef PowhegMEee2gZ2qq:MaximumFlavour 5
newdef PowhegMEee2gZ2qq:AlphaQCD /Herwig/Shower/AlphaQCD
newdef PowhegMEee2gZ2qq:AlphaQED /Herwig/Shower/AlphaQED
create Herwig::MEee2gZ2llPowheg PowhegMEee2gZ2ll
newdef PowhegMEee2gZ2ll:Allowed Charged
set PowhegMEee2gZ2ll:AlphaQED /Herwig/Shower/AlphaQED
############################################################
# hadron-hadron matrix elements
############################################################
###################################
# Electroweak processes
###################################
# q qbar -> gamma/Z -> l+l-
create Herwig::MEqq2gZ2ff MEqq2gZ2ff
newdef MEqq2gZ2ff:Process 3
newdef MEqq2gZ2ff:Coupling /Herwig/Shower/AlphaQCD
# q qbar to W -> l nu
create Herwig::MEqq2W2ff MEqq2W2ff
newdef MEqq2W2ff:Process 2
newdef MEqq2W2ff:Coupling /Herwig/Shower/AlphaQCD
# W+jet
create Herwig::MEPP2WJet MEWJet
newdef MEWJet:WDecay Leptons
# Z+jet
create Herwig::MEPP2ZJet MEZJet
newdef MEZJet:ZDecay ChargedLeptons
# PP->WW/WZ/ZZ
create Herwig::MEPP2VV MEPP2VV
# PP->WZ gamma
create Herwig::MEPP2VGamma MEPP2VGamma
###################################
# Photon and jet processes
###################################
# qqbar/gg -> gamma gamma
create Herwig::MEPP2GammaGamma MEGammaGamma
# hadron-hadron to gamma+jet
create Herwig::MEPP2GammaJet MEGammaJet
# QCD 2-to-2
create Herwig::MEQCD2to2 MEQCD2to2
# MinBias
create Herwig::MEMinBias MEMinBias
###################################
# Heavy Quark
###################################
# qqbar/gg -> t tbar
create Herwig::MEPP2QQ MEHeavyQuark
create Herwig::MEPP2SingleTop MESingleTopTChannel
set MESingleTopTChannel:Process tChannel
create Herwig::MEPP2SingleTop MESingleTopSChannel
set MESingleTopSChannel:Process sChannel
create Herwig::MEPP2SingleTop MESingleTopTW
set MESingleTopTW:Process tW
###################################
# Higgs processes
###################################
# hadron-hadron to higgs
create Herwig::MEPP2Higgs MEHiggs
newdef MEHiggs:ShapeScheme MassGenerator
newdef MEHiggs:Process gg
newdef MEHiggs:Coupling /Herwig/Shower/AlphaQCD
# hadron-hadron to higgs+jet
create Herwig::MEPP2HiggsJet MEHiggsJet
# PP->ZH
create Herwig::MEPP2ZH MEPP2ZH
newdef MEPP2ZH:Coupling /Herwig/Shower/AlphaQCD
# PP->WH
create Herwig::MEPP2WH MEPP2WH
newdef MEPP2WH:Coupling /Herwig/Shower/AlphaQCD
# PP -> Higgs via VBF
create Herwig::MEPP2HiggsVBF MEPP2HiggsVBF
newdef MEPP2HiggsVBF:ShowerAlphaQCD /Herwig/Shower/AlphaQCD
# PP -> t tbar Higgs
create Herwig::MEPP2QQHiggs MEPP2ttbarH
newdef MEPP2ttbarH:QuarkType Top
# PP -> b bbar Higgs
create Herwig::MEPP2QQHiggs MEPP2bbbarH
newdef MEPP2bbbarH:QuarkType Bottom
##########################################################
# Hadron-Hadron NLO matrix elements in the Powheg scheme
##########################################################
library HwPowhegMEHadron.so
# q qbar -> gamma/Z -> l+l-
create Herwig::MEqq2gZ2ffPowheg PowhegMEqq2gZ2ff
newdef PowhegMEqq2gZ2ff:Process 3
newdef PowhegMEqq2gZ2ff:Coupling /Herwig/Shower/AlphaQCD
# q qbar to W -> l nu
create Herwig::MEqq2W2ffPowheg PowhegMEqq2W2ff
newdef PowhegMEqq2W2ff:Process 2
newdef PowhegMEqq2W2ff:Coupling /Herwig/Shower/AlphaQCD
# PP->ZH
create Herwig::MEPP2ZHPowheg PowhegMEPP2ZH
newdef PowhegMEPP2ZH:Coupling /Herwig/Shower/AlphaQCD
# PP->WH
create Herwig::MEPP2WHPowheg PowhegMEPP2WH
newdef PowhegMEPP2WH:Coupling /Herwig/Shower/AlphaQCD
# hadron-hadron to higgs
create Herwig::MEPP2HiggsPowheg PowhegMEHiggs
newdef PowhegMEHiggs:ShapeScheme MassGenerator
newdef PowhegMEHiggs:Process gg
newdef PowhegMEHiggs:Coupling /Herwig/Shower/AlphaQCD
# PP->VV
create Herwig::MEPP2VVPowheg PowhegMEPP2VV
newdef PowhegMEPP2VV:Coupling /Herwig/Shower/AlphaQCD
# PP -> Higgs via VBF
create Herwig::MEPP2HiggsVBFPowheg PowhegMEPP2HiggsVBF
newdef PowhegMEPP2HiggsVBF:ShowerAlphaQCD /Herwig/Shower/AlphaQCD
+# PP -> diphoton NLO
+create Herwig::MEPP2GammaGammaPowheg MEGammaGammaPowheg
+set MEGammaGammaPowheg:Process 0
+set MEGammaGammaPowheg:Contribution 1
+set MEGammaGammaPowheg:ShowerAlphaQCD /Herwig/Shower/AlphaQCD
+set MEGammaGammaPowheg:ShowerAlphaQED /Herwig/Shower/AlphaQED
+
##########################################################
# DIS matrix elements
##########################################################
# neutral current
create Herwig::MENeutralCurrentDIS MEDISNC
newdef MEDISNC:Coupling /Herwig/Shower/AlphaQCD
newdef MEDISNC:Contribution 0
# charged current
create Herwig::MEChargedCurrentDIS MEDISCC
newdef MEDISCC:Coupling /Herwig/Shower/AlphaQCD
newdef MEDISCC:Contribution 0
# neutral current (POWHEG)
create Herwig::MENeutralCurrentDIS PowhegMEDISNC
newdef PowhegMEDISNC:Coupling /Herwig/Shower/AlphaQCD
newdef PowhegMEDISNC:Contribution 1
# charged current (POWHEG)
create Herwig::MEChargedCurrentDIS PowhegMEDISCC
newdef PowhegMEDISCC:Coupling /Herwig/Shower/AlphaQCD
newdef PowhegMEDISCC:Contribution 1
##########################################################
# Gamma-Gamma matrix elements
##########################################################
# fermion-antiferimon
create Herwig::MEGammaGamma2ff MEgg2ff HwMEGammaGamma.so
# W+ W-
create Herwig::MEGammaGamma2WW MEgg2WW HwMEGammaGamma.so
##########################################################
# Gamma-Hadron matrix elements
##########################################################
# gamma parton -> 2 jets
create Herwig::MEGammaP2Jets MEGammaP2Jets HwMEGammaHadron.so
##########################################################
# Set up the Subprocesses
#
# For e+e-
##########################################################
create ThePEG::SubProcessHandler SimpleEE
newdef SimpleEE:PartonExtractor /Herwig/Partons/EEExtractor
##########################################################
# For hadron-hadron
##########################################################
create ThePEG::SubProcessHandler SimpleQCD
newdef SimpleQCD:PartonExtractor /Herwig/Partons/QCDExtractor
##########################################################
# For DIS
##########################################################
create ThePEG::SubProcessHandler SimpleDIS
newdef SimpleDIS:PartonExtractor /Herwig/Partons/DISExtractor