Page MenuHomeHEPForge
Files F7879724

No OneTemporary
Actions

View Options

diff --git a/Handlers/StdXCombGroup.cc b/Handlers/StdXCombGroup.cc
--- a/Handlers/StdXCombGroup.cc
+++ b/Handlers/StdXCombGroup.cc
@@ -1,362 +1,364 @@
// -*- C++ -*-
//
// StdXCombGroup.cc is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2007 Leif Lonnblad
// Copyright (C) 2009-2010 Simon Platzer
//
// ThePEG 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 StdXCombGroup class.
//
#include "StdXCombGroup.h"
#include "ThePEG/MatrixElement/MEGroup.h"
#include "ThePEG/Handlers/StandardEventHandler.h"
#include "ThePEG/Handlers/SubProcessHandler.h"
#include "ThePEG/Cuts/Cuts.h"
#include "ThePEG/PDF/PartonExtractor.h"
#include "ThePEG/Utilities/Debug.h"
#include "ThePEG/Utilities/Maths.h"
#include "ThePEG/PDT/ParticleData.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "ThePEG/Utilities/SimplePhaseSpace.h"
#include "ThePEG/Utilities/UtilityBase.h"
#include "ThePEG/EventRecord/Particle.h"
#include "ThePEG/EventRecord/SubProcessGroup.h"
#include "ThePEG/Vectors/LorentzRotation.h"
#include "ThePEG/MatrixElement/MEBase.h"
#include "ThePEG/MatrixElement/ColourLines.h"
#include "ThePEG/Handlers/LuminosityFunction.h"
#include "ThePEG/Handlers/CascadeHandler.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/EventRecord/TmpTransform.h"
using namespace ThePEG;
StdXCombGroup::StdXCombGroup(Energy newMaxEnergy, const cPDPair & inc,
tEHPtr newEventHandler,tSubHdlPtr newSubProcessHandler,
tPExtrPtr newExtractor, tCascHdlPtr newCKKW,
const PBPair & newPartonBins, tCutsPtr newCuts, tMEGroupPtr newME,
const DiagramVector & newDiagrams, bool mir)
: StandardXComb(newMaxEnergy,inc,newEventHandler,newSubProcessHandler,
newExtractor, newCKKW, newPartonBins, newCuts,
newME, newDiagrams, mir),
theMEGroup(newME), theDependent(), theLastHeadCrossSection(ZERO) {}
StdXCombGroup::StdXCombGroup()
: StandardXComb(), theDependent() {}
void StdXCombGroup::build(const PartonPairVec& allPBins) {
for ( MEVector::const_iterator me = theMEGroup->dependent().begin();
me != theMEGroup->dependent().end(); ++me ) {
StdDependentXCombPtr dep =
theMEGroup->makeDependentXComb(this,diagrams().front()->partons(),*me,allPBins);
theDependent.push_back(dep);
}
}
StdXCombGroup::~StdXCombGroup() { }
CrossSection StdXCombGroup::dSigDR(const pair<double,double> ll, int nr, const double * r) {
matrixElement()->flushCaches();
if ( matrixElement()->keepRandomNumbers() ) {
lastRandomNumbers().resize(nDim());
copy(r,r+nDim(),lastRandomNumbers().begin());
}
pExtractor()->select(this);
setPartonBinInfo();
lastP1P2(ll);
lastS(sqr(maxEnergy())/exp(lastP1() + lastP2()));
meMomenta().resize(mePartonData().size());
matrixElement()->setXComb(this);
PPair partons;
if ( !matrixElement()->haveX1X2() ) {
if ( !pExtractor()->generateL(partonBinInstances(),
r, r + nr - partonDims.second) ) {
lastCrossSection(ZERO);
return ZERO;
}
partons = make_pair(partonBinInstances().first->parton(),
partonBinInstances().second->parton());
lastSHat(lastS()/exp(partonBinInstances().first->l() +
partonBinInstances().second->l()));
meMomenta()[0] = partons.first->momentum();
meMomenta()[1] = partons.second->momentum();
} else {
if ( !matrixElement()->generateKinematics(r + partonDims.first) ) {
lastCrossSection(ZERO);
return ZERO;
}
lastSHat((meMomenta()[0]+meMomenta()[1]).m2());
matrixElement()->setKinematics();
lastScale(matrixElement()->scale());
partons.first = mePartonData()[0]->produceParticle(meMomenta()[0]);
partons.second = mePartonData()[1]->produceParticle(meMomenta()[1]);
Direction<0> dir(true);
partonBinInstances().first =
new_ptr(PartonBinInstance(lastParticles().first,partons.first,
partonBins().first,lastScale()));
dir.reverse();
partonBinInstances().second =
new_ptr(PartonBinInstance(lastParticles().second,partons.second,
partonBins().second,lastScale()));
}
lastPartons(partons);
if ( lastSHat() < cuts()->sHatMin() ) {
lastCrossSection(ZERO);
return ZERO;
}
lastY(0.5*(partonBinInstances().second->l() -
partonBinInstances().first->l()));
if ( !cuts()->initSubProcess(lastSHat(), lastY(), mirror()) ) {
lastCrossSection(ZERO);
return ZERO;
}
if ( mirror() ) swap(meMomenta()[0], meMomenta()[1]);
if ( matrixElement()->wantCMS() &&
!matrixElement()->haveX1X2() )
SimplePhaseSpace::CMS(meMomenta()[0], meMomenta()[1], lastSHat());
Energy summ = ZERO;
if ( meMomenta().size() == 3 ) {
if ( !matrixElement()->haveX1X2() )
meMomenta()[2] = Lorentz5Momentum(sqrt(lastSHat()));
} else {
for ( int i = 2, N = meMomenta().size(); i < N; ++i ) {
if ( !matrixElement()->haveX1X2() )
meMomenta()[i] = Lorentz5Momentum(mePartonData()[i]->mass());
summ += mePartonData()[i]->massMin();
}
if ( sqr(summ) >= lastSHat() ) {
lastCrossSection(ZERO);
return ZERO;
}
}
matrixElement()->setXComb(this);
if ( !matrixElement()->haveX1X2() )
lastScale(max(lastSHat()/4.0, cuts()->scaleMin()));
lastSHat(pExtractor()->generateSHat(lastS(), partonBinInstances(),
r, r + nr - partonDims.second,
matrixElement()->haveX1X2()));
if ( !cuts()->sHat(lastSHat()) ) {
lastCrossSection(ZERO);
return ZERO;
}
r += partonDims.first;
lastX1X2(make_pair(lastPartons().first->momentum().plus()/
lastParticles().first->momentum().plus(),
lastPartons().second->momentum().minus()/
lastParticles().second->momentum().minus()));
if ( !cuts()->x1(lastX1()) || !cuts()->x2(lastX2()) ) {
lastCrossSection(ZERO);
return ZERO;
}
lastY((lastPartons().first->momentum() +
lastPartons().second->momentum()).rapidity());
if ( !cuts()->yHat(lastY()) ) {
lastCrossSection(ZERO);
return ZERO;
}
if ( !cuts()->initSubProcess(lastSHat(), lastY(), mirror()) ) {
lastCrossSection(ZERO);
return ZERO;
}
meMomenta()[0] = lastPartons().first->momentum();
meMomenta()[1] = lastPartons().second->momentum();
if ( mirror() ) swap(meMomenta()[0], meMomenta()[1]);
if ( matrixElement()->wantCMS() &&
!matrixElement()->haveX1X2() )
SimplePhaseSpace::CMS(meMomenta()[0], meMomenta()[1], lastSHat());
if ( meMomenta().size() == 3 ) {
if ( !matrixElement()->haveX1X2() )
meMomenta()[2] = Lorentz5Momentum(sqrt(lastSHat()));
} else {
if ( sqr(summ) >= lastSHat() ) {
lastCrossSection(ZERO);
return ZERO;
}
}
matrixElement()->setXComb(this);
if ( !matrixElement()->haveX1X2() ) {
if ( !matrixElement()->generateKinematics(r) ) {
lastCrossSection(ZERO);
return ZERO;
}
}
lastScale(matrixElement()->scale());
if ( !cuts()->scale(lastScale()) ) {
lastCrossSection(ZERO);
return ZERO;
}
pair<bool,bool> evalPDFS =
make_pair(matrixElement()->havePDFWeight1(),
matrixElement()->havePDFWeight2());
if ( mirror() )
swap(evalPDFS.first,evalPDFS.second);
lastPDFWeight(pExtractor()->fullFn(partonBinInstances(), lastScale(),
evalPDFS));
if ( lastPDFWeight() == 0.0 ) {
lastCrossSection(ZERO);
return ZERO;
}
matrixElement()->setKinematics();
CrossSection xsec = matrixElement()->dSigHatDR() * lastPDFWeight();
bool noHeadPass = !willPassCuts() || xsec == ZERO;
- if ( noHeadPass )
+ if ( noHeadPass ) {
+ xsec = ZERO;
lastCrossSection(ZERO);
+ }
lastAlphaS(matrixElement()->alphaS());
lastAlphaEM(matrixElement()->alphaEM());
subProcess(SubProPtr());
if ( CKKWHandler() && matrixElement()->maxMultCKKW() > 0 &&
matrixElement()->maxMultCKKW() > matrixElement()->minMultCKKW() ) {
newSubProcess(theMEGroup->subProcessGroups());
CKKWHandler()->setXComb(this);
xsec *= CKKWHandler()->reweightCKKW(matrixElement()->minMultCKKW(),
matrixElement()->maxMultCKKW());
}
if ( matrixElement()->reweighted() ) {
newSubProcess(theMEGroup->subProcessGroups());
xsec *= matrixElement()->reWeight() * matrixElement()->preWeight();
}
lastHeadCrossSection(xsec);
CrossSection depxsec = ZERO;
if ( !theMEGroup->mcSumDependent() ) {
for ( StdDepXCVector::const_iterator dep = theDependent.begin();
dep != theDependent.end(); ++dep ) {
if ( !(*dep) )
continue;
if ( !(**dep).matrixElement()->apply() )
continue;
if ( noHeadPass && (**dep).matrixElement()->headCuts() )
continue;
depxsec += (**dep).dSigDR();
}
} else {
if ( !noHeadPass || !theMEGroup->lastDependentXComb()->matrixElement()->headCuts() )
depxsec = theDependent.size()*theMEGroup->lastDependentXComb()->dSigDR();
}
if ( xsec != ZERO ) {
double rw = 1.0 + depxsec/xsec;
xsec *= rw;
} else {
xsec = depxsec;
}
lastCrossSection(xsec);
if ( xsec != ZERO )
theMEGroup->lastEventStatistics();
return xsec;
}
void StdXCombGroup::newSubProcess(bool) {
// subprocess selection goes here
// if me group returns an associated
// selector
StandardXComb::newSubProcess(theMEGroup->subProcessGroups());
if ( !theMEGroup->subProcessGroups() )
return;
subProcess()->groupWeight(lastHeadCrossSection()/lastCrossSection());
Ptr<SubProcessGroup>::tptr group =
dynamic_ptr_cast<Ptr<SubProcessGroup>::tptr>(subProcess());
assert(group);
for ( StdDepXCVector::iterator dep = theDependent.begin();
dep != theDependent.end(); ++dep ) {
if ( !(*dep) )
continue;
if ( (**dep).lastCrossSection() == ZERO ||
!(**dep).matrixElement()->apply() )
continue;
tSubProPtr ds;
try {
ds = (**dep).construct();
} catch(Veto&) {
continue;
}
if ( ds )
group->add(ds);
}
}
tSubProPtr StdXCombGroup::construct() {
if ( !theMEGroup->subProcessGroups() )
return StandardXComb::construct();
matrixElement()->setXComb(this);
setPartonBinInfo();
matrixElement()->setKinematics();
newSubProcess(true);
TmpTransform<tSubProPtr>
tmp(subProcess(), Utilities::getBoostToCM(subProcess()->incoming()));
if ( !cuts()->passCuts(*subProcess()) ) {
subProcess()->groupWeight(0.0);
}
return subProcess();
}
void StdXCombGroup::Init() {}
void StdXCombGroup::persistentOutput(PersistentOStream & os) const {
os << theDependent << theMEGroup << ounit(theLastHeadCrossSection,nanobarn);
}
void StdXCombGroup::persistentInput(PersistentIStream & is, int) {
is >> theDependent >> theMEGroup >> iunit(theLastHeadCrossSection,nanobarn);
}
ClassDescription<StdXCombGroup> StdXCombGroup::initStdXCombGroup;

File Metadata

Mime Type
text/x-diff
Expires
Tue, Nov 19, 8:47 PM (1 d, 32 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
3806150
Default Alt Text
(11 KB)

Event Timeline