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diff --git a/.hgignore b/.hgignore
--- a/.hgignore
+++ b/.hgignore
@@ -1,100 +1,101 @@
Makefile$
Makefile\.in$
\.deps$
\.libs$
\.l[ao]$
\.so$
\.so\.
\.o$
~$
\.pyc$
\.codereplace$
\.orig$
\.tar\.(gz|bz2)$
^autom4te.cache$
^config.herwig$
^config.log$
^config.status$
^configure$
^include/Herwig$
^Config/config.guess$
^Config/config.h$
^Config/config.h.in$
^Config/config.sub$
^Config/depcomp$
^Config/compile$
^Config/install-sh$
^Config/missing$
^Config/stamp-h1$
^Config/ar-lib$
^Contrib/make_makefiles.sh$
+^Contrib/.*/.*\.(log|out|tex|run)$
^Utilities/hgstamp.inc$
^Doc/HerwigDefaults.in$
^Doc/refman-html$
^Doc/fixinterfaces.pl$
^Doc/refman.conf$
^Doc/refman.h$
^Doc/AllInterfaces.h$
^Doc/HerwigDefaults.rpo$
^Doc/Herwig-refman.tag$
^Doc/tagfileThePEG.tag$
^Doc/.*\.log$
^INSTALL$
^aclocal.m4$
^confdefs.h$
^conftest.c$
^conftest.err$
^include/done-all-links$
^libtool$
\.dirstamp$
^src/hgstamp.inc$
^src/herwigopts.h$
^src/herwigopts.c$
^src/defaults/Analysis.in$
^src/herwig-config$
^src/.*\.(run|tex|out|log|rpo|spc|top|dump|dot|aux|pdf|ps|png|svg|hepmc|dvi)$
^src/Makefile-UserModules$
^lib/done-all-links$
^lib/apple-fixes$
^src/defaults/PDF.in$
^src/defaults/done-all-links$
^src/tune$
^src/Herwig$
^src/Herwig-scratch$
^src/tests/.*\.(time|mult|Bmult|chisq)$
^Tests/.*/.*\.(top|ps|pyc|info|dat|pdf|png)$
^Tests/.*\.(top|ps|pyc|info|dat|pdf|png|log|out)$
^Tests/.*\.(top|run|tex|mult|Bmult|aida|yoda)$
^Tests/Rivet-.*$
^Tests/Rivet/(LEP|DIS|LHC|TVT|Star|BFactory|ISR|SppS)-.*\.in$
^Tests/plots$
^Tests/Herwig$
^Tests/.*index.html$
^Herwig\-
^Models/Feynrules/python/Makefile-FR$
^MatrixElement/Matchbox/External/MadGraph/mg2herwig.py$
^MatrixElement/Matchbox/Scales/MatchboxScale.cc$
^Utilities/Statistics/herwig-combinedistributions$
^Utilities/Statistics/herwig-combineruns$
^Utilities/Statistics/herwig-makedistributions$
^src/defaults/MatchboxDefaults.in$
^src/defaults/setup.gosam.in$
^src/Matchbox/LO-DefaultShower.in$
^src/Matchbox/LO-DipoleShower.in$
^src/Matchbox/LO-NoShower.in$
^src/Matchbox/MCatLO-DefaultShower.in$
^src/Matchbox/MCatLO-DipoleShower.in$
^src/Matchbox/MCatNLO-DefaultShower.in$
^src/Matchbox/MCatNLO-DipoleShower.in$
^src/Matchbox/NLO-NoShower.in$
^src/Matchbox/Powheg-DefaultShower.in$
^src/Matchbox/Powheg-DipoleShower.in$
^src/Matchbox/done-all-links$
^src/snippets/done-all-links$
^Utilities/XML/xml_test$
^Utilities/utilities_test$
^Utilities/versionstring.h$
test\.(log|trs)$
test-suite\.log$
^Config/test-driver$
param_card\.dat$
diff --git a/Contrib/Makefile.am b/Contrib/Makefile.am
--- a/Contrib/Makefile.am
+++ b/Contrib/Makefile.am
@@ -1,20 +1,21 @@
EXTRA_DIST = \
AcerDetInterface \
AlpGen \
Analysis2 \
AnomalousHVV \
DecayAnalysis \
FxFx \
HiggsPair \
HiggsPairOL \
LeptonME \
PGSInterface \
RadiativeZPrime \
TauAnalysis \
-MultiWeight
+MultiWeight \
+ShowerVeto
dist-hook:
rm -rf `find $(distdir) -name '.svn' -or -name 'Makefile' -or -name '.hg'`
all:
bash make_makefiles.sh
diff --git a/Contrib/ShowerVeto/LHC.in b/Contrib/ShowerVeto/LHC.in
new file mode 100644
--- /dev/null
+++ b/Contrib/ShowerVeto/LHC.in
@@ -0,0 +1,62 @@
+# -*- ThePEG-repository -*-
+
+##################################################
+# Example generator based on LHC parameters
+# usage: Herwig read LHC.in
+##################################################
+
+##################################################
+# Technical parameters for this run
+##################################################
+cd /Herwig/Generators
+set LHCGenerator:NumberOfEvents 10000000
+set LHCGenerator:RandomNumberGenerator:Seed 31122001
+set LHCGenerator:PrintEvent 10000
+set LHCGenerator:MaxErrors 10000
+
+##################################################
+# LHC physics parameters (override defaults here)
+##################################################
+
+# Intrinsic pT tune extrapolated to LHC energy
+set /Herwig/Shower/Evolver:IntrinsicPtGaussian 2.2*GeV
+
+########################
+## sqrt(s) = 13000 GeV ##
+########################
+set LHCGenerator:EventHandler:LuminosityFunction:Energy 13000.0
+
+##################################################
+# Matrix Elements for hadron-hadron collisions
+# (by default only gamma/Z switched on)
+##################################################
+cd /Herwig/MatrixElements/
+
+#
+# QCD and gamma processes
+#
+# QCD 2-2 scattering
+insert SimpleQCD:MatrixElements[0] MEQCD2to2
+set MEQCD2to2:Process 1
+
+cd /Herwig/Shower
+# setup to reweight events ensuring b quarks after shower
+create Herwig::NonBShowerVeto NonBShowerVeto HwShowerVeto.so
+insert Evolver:FullShowerVetoes 0 NonBShowerVeto
+set NonBShowerVeto:Type Primary
+# reweighting, change for other behaviour
+set NonBShowerVeto:Behaviour ShowerReweight
+# or to veto events which don't have b quarks after shower
+# set NonBShowerVeto:Behaviour Event
+set Evolver:MaxTry 1000
+
+
+cd /Herwig/Generators
+##################################################
+# Save run for later usage with 'Herwig run'
+##################################################
+set /Herwig/Analysis/Basics:CheckQuark 0
+set /Herwig/Shower/ShowerHandler:MPIHandler NULL
+set LHCGenerator:EventHandler:DecayHandler NULL
+set LHCGenerator:EventHandler:HadronizationHandler NULL
+saverun LHC LHCGenerator
diff --git a/Contrib/ShowerVeto/Makefile.in b/Contrib/ShowerVeto/Makefile.in
new file mode 100644
--- /dev/null
+++ b/Contrib/ShowerVeto/Makefile.in
@@ -0,0 +1,36 @@
+# -*- Makefile -*- (for emacs)
+
+#
+# This Makefile is intended for compiling Herwig++ plugins
+# You can find plugins here: INSERT URL
+#
+# This Makefile received very little testing,
+# any bug reports are very welcome!
+#
+
+# location of include files
+THEPEGINCLUDE =
+GSLINCLUDE =
+HERWIGINCLUDE =
+INCLUDE = $(THEPEGINCLUDE) $(GSLINCLUDE) $(HERWIGINCLUDE)
+#
+# C++ flags
+#
+CXX =
+CXXFLAGS =
+LDFLAGS =
+SHARED_FLAG =
+
+ALLCCFILES=$(shell echo *.cc)
+
+default : HwShowerVeto.so
+
+%.o : %.cc %.h
+ $(CXX) -fPIC $(CPPFLAGS) $(INCLUDE) $(CXXFLAGS) -c -shared $< -o $@
+
+HwShowerVeto.so: NonBShowerVeto.o
+ $(CXX) -fPIC $(CPPFLAGS) $(INCLUDE) $(CXXFLAGS) \
+ NonBShowerVeto.o $(SHARED_FLAG) $(LDFLAGS) -o HwShowerVeto.so
+
+clean:
+ rm -f $(ALLCCFILES:.cc=.o) HwShowerVeto.so
diff --git a/Contrib/ShowerVeto/NonBShowerVeto.cc b/Contrib/ShowerVeto/NonBShowerVeto.cc
new file mode 100644
--- /dev/null
+++ b/Contrib/ShowerVeto/NonBShowerVeto.cc
@@ -0,0 +1,46 @@
+// -*- C++ -*-
+//
+// This is the implementation of the non-inlined, non-templated member
+// functions of the NonBShowerVeto class.
+//
+
+#include "NonBShowerVeto.h"
+#include "ThePEG/Interface/ClassDocumentation.h"
+#include "ThePEG/EventRecord/Particle.h"
+#include "ThePEG/Repository/UseRandom.h"
+#include "ThePEG/Repository/EventGenerator.h"
+#include "ThePEG/Utilities/DescribeClass.h"
+
+using namespace Herwig;
+
+IBPtr NonBShowerVeto::clone() const {
+ return new_ptr(*this);
+}
+
+IBPtr NonBShowerVeto::fullclone() const {
+ return new_ptr(*this);
+}
+
+// The following static variable is needed for the type
+// description system in ThePEG.
+DescribeNoPIOClass<NonBShowerVeto,FullShowerVeto>
+ describeHerwigNonBShowerVeto("Herwig::NonBShowerVeto", "HwShowerVeto.so");
+
+void NonBShowerVeto::Init() {
+
+ static ClassDocumentation<NonBShowerVeto> documentation
+ ("The NonBShowerVeto class vetos the parton-shower when no b (anti)quarks have been produced");
+
+}
+
+bool NonBShowerVeto::vetoShower() {
+ // loop over final-state
+ for(vector<tPPtr>::const_iterator it=finalState().begin(); it!=finalState().end();++it) {
+ // don't veto if find a b (anti)quark
+ if(abs((**it).id())==5) {
+ return false;
+ }
+ }
+ // no b (anti)quarks veto shower
+ return true;
+}
diff --git a/Contrib/ShowerVeto/NonBShowerVeto.h b/Contrib/ShowerVeto/NonBShowerVeto.h
new file mode 100644
--- /dev/null
+++ b/Contrib/ShowerVeto/NonBShowerVeto.h
@@ -0,0 +1,75 @@
+// -*- C++ -*-
+#ifndef Herwig_NonBShowerVeto_H
+#define Herwig_NonBShowerVeto_H
+//
+// This is the declaration of the NonBShowerVeto class.
+//
+
+#include "Herwig/Shower/Base/FullShowerVeto.h"
+
+namespace Herwig {
+
+using namespace ThePEG;
+
+/**
+ * The NonBShowerVeto class vetos parton showers where no b (anti)quarks are produced.
+ *
+ * @see \ref NonBShowerVetoInterfaces "The interfaces"
+ * defined for NonBShowerVeto.
+ */
+class NonBShowerVeto: public FullShowerVeto {
+
+public:
+ /**
+ * The default constructor.
+ */
+ NonBShowerVeto() {}
+
+protected:
+
+ /**
+ * Determine whether to not to veto the shower, to be implemented in inheriting classes
+ */
+ virtual bool vetoShower();
+
+
+public:
+
+ /**
+ * 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;
+ //@}
+
+private:
+
+ /**
+ * The assignment operator is private and must never be called.
+ * In fact, it should not even be implemented.
+ */
+ NonBShowerVeto & operator=(const NonBShowerVeto &);
+
+};
+
+}
+
+#endif /* Herwig_NonBShowerVeto_H */
diff --git a/DipoleShower/DipoleShowerHandler.cc b/DipoleShower/DipoleShowerHandler.cc
--- a/DipoleShower/DipoleShowerHandler.cc
+++ b/DipoleShower/DipoleShowerHandler.cc
@@ -1,1115 +1,1119 @@
// -*- C++ -*-
//
// DipoleShowerHandler.cc 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 DipoleShowerHandler class.
//
#include <config.h>
#include "DipoleShowerHandler.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/RefVector.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
// include theses to have complete types
#include "Herwig/Shower/Base/Evolver.h"
#include "Herwig/Shower/Base/ShowerParticle.h"
#include "Herwig/PDF/MPIPDF.h"
#include "Herwig/PDF/MinBiasPDF.h"
#include "Herwig/Shower/Base/ShowerTree.h"
#include "Herwig/Shower/Base/KinematicsReconstructor.h"
#include "Herwig/Shower/Base/PartnerFinder.h"
#include "Herwig/PDF/HwRemDecayer.h"
#include "Herwig/DipoleShower/Utility/DipolePartonSplitter.h"
#include "Herwig/MatrixElement/Matchbox/Base/SubtractedME.h"
#include "Herwig/MatrixElement/Matchbox/MatchboxFactory.h"
using namespace Herwig;
bool DipoleShowerHandler::firstWarn = true;
DipoleShowerHandler::DipoleShowerHandler()
: ShowerHandler(), chainOrderVetoScales(true),
nEmissions(0), discardNoEmissions(false), firstMCatNLOEmission(false),
doFSR(true), doISR(true), realignmentScheme(0),
verbosity(0), printEvent(0), nTries(0),
didRadiate(false), didRealign(false),
theRenormalizationScaleFreeze(1.*GeV),
theFactorizationScaleFreeze(2.*GeV),
isMCatNLOSEvent(false),
isMCatNLOHEvent(false), theDoCompensate(false),
theFreezeGrid(500000), theDetuning(1.0),
maxPt(ZERO), muPt(ZERO) {}
DipoleShowerHandler::~DipoleShowerHandler() {}
IBPtr DipoleShowerHandler::clone() const {
return new_ptr(*this);
}
IBPtr DipoleShowerHandler::fullclone() const {
return new_ptr(*this);
}
tPPair DipoleShowerHandler::cascade(tSubProPtr sub, XCPtr,
Energy optHardPt, Energy optCutoff) {
useMe();
prepareCascade(sub);
resetWeights();
if ( !doFSR && ! doISR )
return sub->incoming();
eventRecord().clear();
eventRecord().prepare(sub,dynamic_ptr_cast<tStdXCombPtr>(lastXCombPtr()),pdfs());
if ( eventRecord().outgoing().empty() && !doISR )
return sub->incoming();
if ( !eventRecord().incoming().first->coloured() &&
!eventRecord().incoming().second->coloured() &&
!doFSR )
return sub->incoming();
nTries = 0;
while ( true ) {
try {
didRadiate = false;
didRealign = false;
isMCatNLOSEvent = false;
isMCatNLOHEvent = false;
if ( eventRecord().xcombPtr() ) {
Ptr<SubtractedME>::tptr subme =
dynamic_ptr_cast<Ptr<SubtractedME>::tptr>(eventRecord().xcombPtr()->matrixElement());
Ptr<MatchboxMEBase>::tptr me =
dynamic_ptr_cast<Ptr<MatchboxMEBase>::tptr>(eventRecord().xcombPtr()->matrixElement());
Ptr<SubtractionDipole>::tptr dipme =
dynamic_ptr_cast<Ptr<SubtractionDipole>::tptr>(eventRecord().xcombPtr()->matrixElement());
if ( subme ) {
if ( subme->showerApproximation() ) {
// don't do this for POWHEG-type corrections
if ( !subme->showerApproximation()->needsSplittingGenerator() ) {
theShowerApproximation = subme->showerApproximation();
if ( subme->realShowerSubtraction() )
isMCatNLOHEvent = true;
else if ( subme->virtualShowerSubtraction() )
isMCatNLOSEvent = true;
}
}
} else if ( me ) {
if ( me->factory()->showerApproximation() ) {
if ( !me->factory()->showerApproximation()->needsSplittingGenerator() ) {
theShowerApproximation = me->factory()->showerApproximation();
isMCatNLOSEvent = true;
}
}
}
string error = "Inconsistent hard emission set-up in DipoleShowerHandler::cascade. ";
if (evolver()->hardEmissionMode()==1 || evolver()->hardEmissionMode()==3 )
throw Exception() << error
<< "Cannot generate POWHEG corrections "
<< "for particle decays using DipoleShowerHandler. "
<< "Check value of Evolver:HardEmissionMode."
<< Exception::runerror;
if ( ( isMCatNLOSEvent || isMCatNLOHEvent ) && evolver()->hardEmissionMode()==2)
throw Exception() << error
<< "Cannot generate POWHEG matching with MC@NLO shower approximation. "
<< "Add 'set Evolver:HardEmissionMode 0' to input file."
<< Exception::runerror;
if (me && me->factory()->showerApproximation()){
if(me->factory()->showerApproximation()->needsTruncatedShower())
throw Exception() << error
<< "No truncated shower needed with DipoleShowerHandler. Add "
<< "'set MEMatching:TruncatedShower No' to input file."
<< Exception::runerror;
if (!( isMCatNLOSEvent || isMCatNLOHEvent ) &&
evolver()->hardEmissionMode()==0 && firstWarn){
firstWarn=false;
throw Exception() << error
<< "Evolver:HardEmissionMode will be set to 'MatchboxPOWHEG'"
<< Exception::warning;
}
}
else if (subme && subme->factory()->showerApproximation()){
if(subme->factory()->showerApproximation()->needsTruncatedShower())
throw Exception() << error
<< "No truncated shower needed with DipoleShowerHandler. Add "
<< "'set MEMatching:TruncatedShower No' to input file."
<< Exception::runerror;
if (!( isMCatNLOSEvent || isMCatNLOHEvent ) &&
evolver()->hardEmissionMode()==0 && firstWarn){
firstWarn=false;
throw Exception() << error
<< "Evolver:HardEmissionMode will be set to 'MatchboxPOWHEG'"
<< Exception::warning;
}
}
else if (dipme && evolver()->hardEmissionMode() == 0 && firstWarn){
firstWarn=false;
throw Exception() << error
<< "Evolver:HardEmissionMode will be set to 'MatchboxPOWHEG'"
<< Exception::warning;
}
else if (!dipme && evolver()->hardEmissionMode()==2 &&
ShowerHandler::currentHandler()->firstInteraction())
throw Exception() << error
<< "POWHEG matching requested for LO events. Include "
<< "'set Factory:ShowerApproximation MEMatching' in input file."
<< Exception::runerror;
}
hardScales(lastXCombPtr()->lastShowerScale());
if ( verbosity > 1 ) {
generator()->log() << "DipoleShowerHandler starting off:\n";
eventRecord().debugLastEvent(generator()->log());
generator()->log() << flush;
}
unsigned int nEmitted = 0;
if ( firstMCatNLOEmission ) {
if ( !isMCatNLOHEvent )
nEmissions = 1;
else
nEmissions = 0;
}
if ( !firstMCatNLOEmission ) {
doCascade(nEmitted,optHardPt,optCutoff);
if ( discardNoEmissions ) {
if ( !didRadiate )
throw Veto();
if ( nEmissions )
if ( nEmissions < nEmitted )
throw Veto();
}
} else {
if ( nEmissions == 1 )
doCascade(nEmitted,optHardPt,optCutoff);
}
if ( intrinsicPtGenerator ) {
if ( eventRecord().incoming().first->coloured() &&
eventRecord().incoming().second->coloured() ) {
SpinOneLorentzRotation rot =
intrinsicPtGenerator->kick(eventRecord().incoming(),
eventRecord().intermediates());
eventRecord().transform(rot);
}
}
didRealign = realign();
constituentReshuffle();
break;
} catch (RedoShower&) {
resetWeights();
if ( ++nTries > maxtry() )
throw ShowerTriesVeto(maxtry());
eventRecord().clear();
eventRecord().prepare(sub,dynamic_ptr_cast<tStdXCombPtr>(lastXCombPtr()),pdfs());
continue;
} catch (...) {
throw;
}
}
return eventRecord().fillEventRecord(newStep(),firstInteraction(),didRealign);
}
void DipoleShowerHandler::constituentReshuffle() {
if ( constituentReshuffler ) {
constituentReshuffler->reshuffle(eventRecord().outgoing(),
eventRecord().incoming(),
eventRecord().intermediates());
}
}
void DipoleShowerHandler::hardScales(Energy2 muf) {
maxPt = generator()->maximumCMEnergy();
if ( restrictPhasespace() ) {
if ( !hardScaleIsMuF() || !firstInteraction() ) {
if ( !eventRecord().outgoing().empty() ) {
for ( PList::const_iterator p = eventRecord().outgoing().begin();
p != eventRecord().outgoing().end(); ++p )
maxPt = min(maxPt,(**p).momentum().mt());
} else {
assert(!eventRecord().hard().empty());
Lorentz5Momentum phard(ZERO,ZERO,ZERO,ZERO);
for ( PList::const_iterator p = eventRecord().hard().begin();
p != eventRecord().hard().end(); ++p )
phard += (**p).momentum();
Energy mhard = phard.m();
maxPt = mhard;
}
maxPt *= hardScaleFactor();
} else {
maxPt = hardScaleFactor()*sqrt(muf);
}
muPt = maxPt;
} else {
muPt = hardScaleFactor()*sqrt(muf);
}
for ( list<DipoleChain>::iterator ch = eventRecord().chains().begin();
ch != eventRecord().chains().end(); ++ch ) {
Energy minVetoScale = -1.*GeV;
for ( list<Dipole>::iterator dip = ch->dipoles().begin();
dip != ch->dipoles().end(); ++dip ) {
// max scale per config
Energy maxFirst = 0.0*GeV;
Energy maxSecond = 0.0*GeV;
for ( vector<Ptr<DipoleSplittingKernel>::ptr>::iterator k =
kernels.begin(); k != kernels.end(); ++k ) {
pair<bool,bool> conf = make_pair(true,false);
if ( (**k).canHandle(dip->index(conf)) ) {
Energy scale =
evolutionOrdering()->hardScale(dip->emitter(conf),dip->spectator(conf),
dip->emitterX(conf),dip->spectatorX(conf),
**k,dip->index(conf));
maxFirst = max(maxFirst,scale);
}
conf = make_pair(false,true);
if ( (**k).canHandle(dip->index(conf)) ) {
Energy scale =
evolutionOrdering()->hardScale(dip->emitter(conf),dip->spectator(conf),
dip->emitterX(conf),dip->spectatorX(conf),
**k,dip->index(conf));
maxSecond = max(maxSecond,scale);
}
}
if ( dip->leftParticle()->vetoScale() >= ZERO ) {
maxFirst = min(maxFirst,sqrt(dip->leftParticle()->vetoScale()));
if ( minVetoScale >= ZERO )
minVetoScale = min(minVetoScale,sqrt(dip->leftParticle()->vetoScale()));
else
minVetoScale = sqrt(dip->leftParticle()->vetoScale());
}
if ( dip->rightParticle()->vetoScale() >= ZERO ) {
maxSecond = min(maxSecond,sqrt(dip->rightParticle()->vetoScale()));
if ( minVetoScale >= ZERO )
minVetoScale = min(minVetoScale,sqrt(dip->rightParticle()->vetoScale()));
else
minVetoScale = sqrt(dip->rightParticle()->vetoScale());
}
maxFirst = min(maxPt,maxFirst);
dip->emitterScale(make_pair(true,false),maxFirst);
maxSecond = min(maxPt,maxSecond);
dip->emitterScale(make_pair(false,true),maxSecond);
}
if ( !evolutionOrdering()->independentDipoles() &&
chainOrderVetoScales &&
minVetoScale >= ZERO ) {
for ( list<Dipole>::iterator dip = ch->dipoles().begin();
dip != ch->dipoles().end(); ++dip ) {
dip->leftScale(min(dip->leftScale(),minVetoScale));
dip->rightScale(min(dip->rightScale(),minVetoScale));
}
}
}
}
Energy DipoleShowerHandler::getWinner(DipoleSplittingInfo& winner,
const Dipole& dip,
pair<bool,bool> conf,
Energy optHardPt,
Energy optCutoff) {
return
getWinner(winner,dip.index(conf),
dip.emitterX(conf),dip.spectatorX(conf),
conf,dip.emitter(conf),dip.spectator(conf),
dip.emitterScale(conf),optHardPt,optCutoff);
}
Energy DipoleShowerHandler::getWinner(SubleadingSplittingInfo& winner,
Energy optHardPt,
Energy optCutoff) {
return
getWinner(winner,winner.index(),
winner.emitterX(),winner.spectatorX(),
winner.configuration(),
winner.emitter(),winner.spectator(),
winner.startScale(),optHardPt,optCutoff);
}
Energy DipoleShowerHandler::getWinner(DipoleSplittingInfo& winner,
const DipoleIndex& index,
double emitterX, double spectatorX,
pair<bool,bool> conf,
tPPtr emitter, tPPtr spectator,
Energy startScale,
Energy optHardPt,
Energy optCutoff) {
if ( !index.initialStateEmitter() &&
!doFSR ) {
winner.didStopEvolving();
return 0.0*GeV;
}
if ( index.initialStateEmitter() &&
!doISR ) {
winner.didStopEvolving();
return 0.0*GeV;
}
DipoleSplittingInfo candidate;
candidate.index(index);
candidate.configuration(conf);
candidate.emitterX(emitterX);
candidate.spectatorX(spectatorX);
+ candidate.emitter(emitter);
+ candidate.spectator(spectator);
if ( generators().find(candidate.index()) == generators().end() )
- getGenerators(candidate.index());
+ getGenerators(candidate.index(),theSplittingReweight);
//
// NOTE -- needs proper fixing at some point
//
// For some very strange reason, equal_range gives back
// key ranges it hasn't been asked for. This particularly
// happens e.g. for FI dipoles of the same kind, but different
// PDF (hard vs MPI PDF). I can't see a reason for this,
// as DipoleIndex properly implements comparison for equality
// and (lexicographic) ordering; for the time being, we
// use equal_range, extented by an explicit check for wether
// the key is indeed what we wanted. See line after (*) comment
// below.
//
pair<GeneratorMap::iterator,GeneratorMap::iterator> gens
= generators().equal_range(candidate.index());
Energy winnerScale = 0.0*GeV;
GeneratorMap::iterator winnerGen = generators().end();
for ( GeneratorMap::iterator gen = gens.first; gen != gens.second; ++gen ) {
// (*) see NOTE above
if ( !(gen->first == candidate.index()) )
continue;
if ( startScale <= gen->second->splittingKinematics()->IRCutoff() )
continue;
Energy dScale =
gen->second->splittingKinematics()->dipoleScale(emitter->momentum(),
spectator->momentum());
// in very exceptional cases happening in DIS
if ( isnan(dScale/GeV ) )
throw RedoShower();
candidate.scale(dScale);
candidate.continuesEvolving();
Energy hardScale = evolutionOrdering()->maxPt(startScale,candidate,*(gen->second->splittingKernel()));
Energy maxPossible =
gen->second->splittingKinematics()->ptMax(candidate.scale(),
candidate.emitterX(), candidate.spectatorX(),
candidate.index(),
*gen->second->splittingKernel());
Energy ircutoff =
optCutoff < gen->second->splittingKinematics()->IRCutoff() ?
gen->second->splittingKinematics()->IRCutoff() :
optCutoff;
if ( maxPossible <= ircutoff ) {
continue;
}
if ( maxPossible >= hardScale )
candidate.hardPt(hardScale);
else {
hardScale = maxPossible;
candidate.hardPt(maxPossible);
}
gen->second->generate(candidate,currentWeights_,optHardPt,optCutoff);
Energy nextScale = evolutionOrdering()->evolutionScale(gen->second->lastSplitting(),*(gen->second->splittingKernel()));
if ( nextScale > winnerScale ) {
winner.fill(candidate);
gen->second->completeSplitting(winner);
winnerGen = gen;
winnerScale = nextScale;
}
reweight_ *= gen->second->splittingWeight();
}
if ( winnerGen == generators().end() ) {
winner.didStopEvolving();
return 0.0*GeV;
}
if ( winner.stoppedEvolving() )
return 0.0*GeV;
return winnerScale;
}
void DipoleShowerHandler::doCascade(unsigned int& emDone,
Energy optHardPt,
Energy optCutoff) {
if ( nEmissions )
if ( emDone == nEmissions )
return;
DipoleSplittingInfo winner;
DipoleSplittingInfo dipoleWinner;
while ( eventRecord().haveChain() ) {
if ( verbosity > 2 ) {
generator()->log() << "DipoleShowerHandler selecting splittings for the chain:\n"
<< eventRecord().currentChain() << flush;
}
list<Dipole>::iterator winnerDip = eventRecord().currentChain().dipoles().end();
Energy winnerScale = 0.0*GeV;
Energy nextLeftScale = 0.0*GeV;
Energy nextRightScale = 0.0*GeV;
for ( list<Dipole>::iterator dip = eventRecord().currentChain().dipoles().begin();
dip != eventRecord().currentChain().dipoles().end(); ++dip ) {
nextLeftScale = getWinner(dipoleWinner,*dip,make_pair(true,false),optHardPt,optCutoff);
if ( nextLeftScale > winnerScale ) {
winnerScale = nextLeftScale;
winner = dipoleWinner;
winnerDip = dip;
}
nextRightScale = getWinner(dipoleWinner,*dip,make_pair(false,true),optHardPt,optCutoff);
if ( nextRightScale > winnerScale ) {
winnerScale = nextRightScale;
winner = dipoleWinner;
winnerDip = dip;
}
if ( evolutionOrdering()->independentDipoles() ) {
Energy dipScale = max(nextLeftScale,nextRightScale);
if ( dip->leftScale() > dipScale )
dip->leftScale(dipScale);
if ( dip->rightScale() > dipScale )
dip->rightScale(dipScale);
}
}
if ( verbosity > 1 ) {
if ( winnerDip != eventRecord().currentChain().dipoles().end() )
generator()->log() << "DipoleShowerHandler selected the splitting:\n"
<< winner << " for the dipole\n"
<< (*winnerDip) << flush;
else
generator()->log() << "DipoleShowerHandler could not select a splitting above the IR cutoff\n"
<< flush;
}
// pop the chain if no dipole did radiate
if ( winnerDip == eventRecord().currentChain().dipoles().end() ) {
eventRecord().popChain();
if ( theEventReweight && eventRecord().chains().empty() )
if ( (theEventReweight->firstInteraction() && firstInteraction()) ||
(theEventReweight->secondaryInteractions() && !firstInteraction()) ) {
double w = theEventReweight->weightCascade(eventRecord().incoming(),
eventRecord().outgoing(),
eventRecord().hard(),theGlobalAlphaS);
reweight_ *= w;
}
continue;
}
// otherwise perform the splitting
didRadiate = true;
isMCatNLOSEvent = false;
isMCatNLOHEvent = false;
pair<list<Dipole>::iterator,list<Dipole>::iterator> children;
DipoleChain* firstChain = 0;
DipoleChain* secondChain = 0;
eventRecord().split(winnerDip,winner,children,firstChain,secondChain);
assert(firstChain && secondChain);
evolutionOrdering()->setEvolutionScale(winnerScale,winner,*firstChain,children);
if ( !secondChain->dipoles().empty() )
evolutionOrdering()->setEvolutionScale(winnerScale,winner,*secondChain,children);
if ( verbosity > 1 ) {
generator()->log() << "DipoleShowerHandler did split the last selected dipole into:\n"
<< (*children.first) << (*children.second) << flush;
}
if ( verbosity > 2 ) {
generator()->log() << "After splitting the last selected dipole, "
<< "DipoleShowerHandler encountered the following chains:\n"
<< (*firstChain) << (*secondChain) << flush;
}
if ( theEventReweight )
if ( (theEventReweight->firstInteraction() && firstInteraction()) ||
(theEventReweight->secondaryInteractions() && !firstInteraction()) ) {
double w = theEventReweight->weight(eventRecord().incoming(),
eventRecord().outgoing(),
eventRecord().hard(),theGlobalAlphaS);
reweight_ *= w;
}
if ( nEmissions )
if ( ++emDone == nEmissions )
return;
}
}
bool DipoleShowerHandler::realign() {
if ( !didRadiate && !intrinsicPtGenerator )
return false;
if ( eventRecord().incoming().first->coloured() ||
eventRecord().incoming().second->coloured() ) {
if ( eventRecord().incoming().first->momentum().perp2()/GeV2 < 1e-10 &&
eventRecord().incoming().second->momentum().perp2()/GeV2 < 1e-10 )
return false;
pair<Lorentz5Momentum,Lorentz5Momentum> inMomenta
(eventRecord().incoming().first->momentum(),
eventRecord().incoming().second->momentum());
SpinOneLorentzRotation transform((inMomenta.first+inMomenta.second).findBoostToCM());
Axis dir = (transform * inMomenta.first).vect().unit();
Axis rot (-dir.y(),dir.x(),0);
double theta = dir.theta();
if ( lastParticles().first->momentum().z() < ZERO )
theta = -theta;
transform.rotate(-theta,rot);
inMomenta.first = transform*inMomenta.first;
inMomenta.second = transform*inMomenta.second;
assert(inMomenta.first.z() > ZERO &&
inMomenta.second.z() < ZERO);
Energy2 sHat =
(eventRecord().incoming().first->momentum() +
eventRecord().incoming().second->momentum()).m2();
pair<Energy,Energy> masses(eventRecord().incoming().first->mass(),
eventRecord().incoming().second->mass());
pair<Energy,Energy> qs;
if ( !eventRecord().incoming().first->coloured() ) {
assert(masses.second == ZERO);
qs.first = eventRecord().incoming().first->momentum().z();
qs.second = (sHat-sqr(masses.first))/(2.*(qs.first+sqrt(sqr(masses.first)+sqr(qs.first))));
} else if ( !eventRecord().incoming().second->coloured() ) {
assert(masses.first == ZERO);
qs.second = eventRecord().incoming().second->momentum().z();
qs.first = (sHat-sqr(masses.second))/(2.*(qs.second+sqrt(sqr(masses.second)+sqr(qs.second))));
} else {
assert(masses.first == ZERO && masses.second == ZERO);
if ( realignmentScheme == 0 ) {
double yX = eventRecord().pX().rapidity();
double yInt = (transform*eventRecord().pX()).rapidity();
double dy = yX-yInt;
qs.first = (sqrt(sHat)/2.)*exp(dy);
qs.second = (sqrt(sHat)/2.)*exp(-dy);
} else if ( realignmentScheme == 1 ) {
Energy sS = sqrt((lastParticles().first->momentum() +
lastParticles().second->momentum()).m2());
qs.first = eventRecord().fractions().first * sS / 2.;
qs.second = eventRecord().fractions().second * sS / 2.;
}
}
double beta =
(qs.first-qs.second) /
( sqrt(sqr(masses.first)+sqr(qs.first)) +
sqrt(sqr(masses.second)+sqr(qs.second)) );
transform.boostZ(beta);
Lorentz5Momentum tmp;
if ( eventRecord().incoming().first->coloured() ) {
tmp = eventRecord().incoming().first->momentum();
tmp = transform * tmp;
eventRecord().incoming().first->set5Momentum(tmp);
}
if ( eventRecord().incoming().second->coloured() ) {
tmp = eventRecord().incoming().second->momentum();
tmp = transform * tmp;
eventRecord().incoming().second->set5Momentum(tmp);
}
eventRecord().transform(transform);
return true;
}
return false;
}
void DipoleShowerHandler::resetAlphaS(Ptr<AlphaSBase>::tptr as) {
for ( vector<Ptr<DipoleSplittingKernel>::ptr>::iterator k = kernels.begin();
k != kernels.end(); ++k ) {
- (**k).alphaS(as);
+ if ( !(**k).alphaS() )
+ (**k).alphaS(as);
(**k).renormalizationScaleFreeze(theRenormalizationScaleFreeze);
(**k).factorizationScaleFreeze(theFactorizationScaleFreeze);
}
// clear the generators to be rebuild
// actually, there shouldn't be any generators
// when this happens.
generators().clear();
}
void DipoleShowerHandler::resetReweight(Ptr<DipoleSplittingReweight>::tptr rw) {
for ( GeneratorMap::iterator k = generators().begin();
k != generators().end(); ++k )
k->second->splittingReweight(rw);
}
void DipoleShowerHandler::getGenerators(const DipoleIndex& ind,
Ptr<DipoleSplittingReweight>::tptr rw) {
bool gotone = false;
for ( vector<Ptr<DipoleSplittingKernel>::ptr>::iterator k =
kernels.begin(); k != kernels.end(); ++k ) {
if ( (**k).canHandle(ind) ) {
if ( verbosity > 0 ) {
generator()->log() << "DipoleShowerHandler encountered the dipole configuration\n"
<< ind << " in event number "
<< eventHandler()->currentEvent()->number()
<< "\nwhich can be handled by the splitting kernel '"
<< (**k).name() << "'.\n" << flush;
}
gotone = true;
Ptr<DipoleSplittingGenerator>::ptr nGenerator =
new_ptr(DipoleSplittingGenerator());
nGenerator->doCompensate(theDoCompensate);
nGenerator->splittingKernel(*k);
- nGenerator->splittingKernel()->renormalizationScaleFactor(renormalizationScaleFactor());
- nGenerator->splittingKernel()->factorizationScaleFactor(factorizationScaleFactor());
+ if ( renormalizationScaleFactor() != 1. )
+ nGenerator->splittingKernel()->renormalizationScaleFactor(renormalizationScaleFactor());
+ if ( factorizationScaleFactor() != 1. )
+ nGenerator->splittingKernel()->factorizationScaleFactor(factorizationScaleFactor());
+ if ( !nGenerator->splittingReweight() )
+ nGenerator->splittingReweight(rw);
nGenerator->splittingKernel()->freezeGrid(theFreezeGrid);
nGenerator->splittingKernel()->detuning(theDetuning);
GeneratorMap::const_iterator equivalent = generators().end();
for ( GeneratorMap::const_iterator eq = generators().begin();
eq != generators().end(); ++eq ) {
if ( !eq->second->wrapping() )
if ( (**k).canHandleEquivalent(ind,*(eq->second->splittingKernel()),eq->first) ) {
equivalent = eq;
if ( verbosity > 0 ) {
generator()->log() << "The dipole configuration "
<< ind
<< " can equivalently be handled by the existing\n"
<< "generator for configuration "
<< eq->first << " using the kernel '"
<< eq->second->splittingKernel()->name()
<< "'\n" << flush;
}
break;
}
}
if ( equivalent != generators().end() ) {
nGenerator->wrap(equivalent->second);
}
DipoleSplittingInfo dummy;
dummy.index(ind);
- nGenerator->splittingReweight(rw);
nGenerator->prepare(dummy);
generators().insert(make_pair(ind,nGenerator));
}
}
if ( !gotone ) {
generator()->logWarning(Exception()
<< "DipoleShowerHandler could not "
<< "find a splitting kernel which is able "
<< "to handle splittings off the dipole "
<< ind << ".\n"
<< "Please check the input files."
<< Exception::warning);
}
}
// If needed, insert default implementations of virtual function defined
// in the InterfacedBase class here (using ThePEG-interfaced-impl in Emacs).
void DipoleShowerHandler::doinit() {
ShowerHandler::doinit();
if ( theGlobalAlphaS )
resetAlphaS(theGlobalAlphaS);
- if ( theSplittingReweight )
- resetReweight(theSplittingReweight);
}
void DipoleShowerHandler::dofinish() {
ShowerHandler::dofinish();
}
void DipoleShowerHandler::doinitrun() {
ShowerHandler::doinitrun();
}
void DipoleShowerHandler::persistentOutput(PersistentOStream & os) const {
os << kernels << theEvolutionOrdering
<< constituentReshuffler << intrinsicPtGenerator
<< theGlobalAlphaS << chainOrderVetoScales
<< nEmissions << discardNoEmissions << firstMCatNLOEmission << doFSR << doISR
<< realignmentScheme << verbosity << printEvent
<< ounit(theRenormalizationScaleFreeze,GeV)
<< ounit(theFactorizationScaleFreeze,GeV)
<< isMCatNLOSEvent << isMCatNLOHEvent << theShowerApproximation
<< theDoCompensate << theFreezeGrid << theDetuning
<< theEventReweight << theSplittingReweight << ounit(maxPt,GeV)
<< ounit(muPt,GeV);
}
void DipoleShowerHandler::persistentInput(PersistentIStream & is, int) {
is >> kernels >> theEvolutionOrdering
>> constituentReshuffler >> intrinsicPtGenerator
>> theGlobalAlphaS >> chainOrderVetoScales
>> nEmissions >> discardNoEmissions >> firstMCatNLOEmission >> doFSR >> doISR
>> realignmentScheme >> verbosity >> printEvent
>> iunit(theRenormalizationScaleFreeze,GeV)
>> iunit(theFactorizationScaleFreeze,GeV)
>> isMCatNLOSEvent >> isMCatNLOHEvent >> theShowerApproximation
>> theDoCompensate >> theFreezeGrid >> theDetuning
>> theEventReweight >> theSplittingReweight >> iunit(maxPt,GeV)
>> iunit(muPt,GeV);
}
ClassDescription<DipoleShowerHandler> DipoleShowerHandler::initDipoleShowerHandler;
// Definition of the static class description member.
void DipoleShowerHandler::Init() {
static ClassDocumentation<DipoleShowerHandler> documentation
("The DipoleShowerHandler class manages the showering using "
"the dipole shower algorithm.",
"The shower evolution was performed using the algorithm described in "
"\\cite{Platzer:2009jq} and \\cite{Platzer:2011bc}.",
"%\\cite{Platzer:2009jq}\n"
"\\bibitem{Platzer:2009jq}\n"
"S.~Platzer and S.~Gieseke,\n"
"``Coherent Parton Showers with Local Recoils,''\n"
" JHEP {\\bf 1101}, 024 (2011)\n"
"arXiv:0909.5593 [hep-ph].\n"
"%%CITATION = ARXIV:0909.5593;%%\n"
"%\\cite{Platzer:2011bc}\n"
"\\bibitem{Platzer:2011bc}\n"
"S.~Platzer and S.~Gieseke,\n"
"``Dipole Showers and Automated NLO Matching in Herwig,''\n"
"arXiv:1109.6256 [hep-ph].\n"
"%%CITATION = ARXIV:1109.6256;%%");
static RefVector<DipoleShowerHandler,DipoleSplittingKernel> interfaceKernels
("Kernels",
"Set the splitting kernels to be used by the dipole shower.",
&DipoleShowerHandler::kernels, -1, false, false, true, false, false);
static Reference<DipoleShowerHandler,DipoleEvolutionOrdering> interfaceEvolutionOrdering
("EvolutionOrdering",
"Set the evolution ordering to be used.",
&DipoleShowerHandler::theEvolutionOrdering, false, false, true, false, false);
static Reference<DipoleShowerHandler,ConstituentReshuffler> interfaceConstituentReshuffler
("ConstituentReshuffler",
"The object to be used to reshuffle partons to their constitutent mass shells.",
&DipoleShowerHandler::constituentReshuffler, false, false, true, true, false);
static Reference<DipoleShowerHandler,IntrinsicPtGenerator> interfaceIntrinsicPtGenerator
("IntrinsicPtGenerator",
"Set the object in charge to generate intrinsic pt for incoming partons.",
&DipoleShowerHandler::intrinsicPtGenerator, false, false, true, true, false);
static Reference<DipoleShowerHandler,AlphaSBase> interfaceGlobalAlphaS
("GlobalAlphaS",
"Set a global strong coupling for all splitting kernels.",
&DipoleShowerHandler::theGlobalAlphaS, false, false, true, true, false);
static Switch<DipoleShowerHandler,bool> interfaceDoFSR
("DoFSR",
"Switch on or off final state radiation.",
&DipoleShowerHandler::doFSR, true, false, false);
static SwitchOption interfaceDoFSROn
(interfaceDoFSR,
"On",
"Switch on final state radiation.",
true);
static SwitchOption interfaceDoFSROff
(interfaceDoFSR,
"Off",
"Switch off final state radiation.",
false);
static Switch<DipoleShowerHandler,bool> interfaceDoISR
("DoISR",
"Switch on or off initial state radiation.",
&DipoleShowerHandler::doISR, true, false, false);
static SwitchOption interfaceDoISROn
(interfaceDoISR,
"On",
"Switch on initial state radiation.",
true);
static SwitchOption interfaceDoISROff
(interfaceDoISR,
"Off",
"Switch off initial state radiation.",
false);
static Switch<DipoleShowerHandler,int> interfaceRealignmentScheme
("RealignmentScheme",
"The realignment scheme to use.",
&DipoleShowerHandler::realignmentScheme, 0, false, false);
static SwitchOption interfaceRealignmentSchemePreserveRapidity
(interfaceRealignmentScheme,
"PreserveRapidity",
"Preserve the rapidity of non-coloured outgoing system.",
0);
static SwitchOption interfaceRealignmentSchemeEvolutionFractions
(interfaceRealignmentScheme,
"EvolutionFractions",
"Use momentum fractions as generated by the evolution.",
1);
static SwitchOption interfaceRealignmentSchemeCollisionFrame
(interfaceRealignmentScheme,
"CollisionFrame",
"Determine realignment from collision frame.",
2);
static Switch<DipoleShowerHandler,bool> interfaceChainOrderVetoScales
("ChainOrderVetoScales",
"[experimental] Switch on or off the chain ordering for veto scales.",
&DipoleShowerHandler::chainOrderVetoScales, true, false, false);
static SwitchOption interfaceChainOrderVetoScalesOn
(interfaceChainOrderVetoScales,
"On",
"Switch on chain ordering for veto scales.",
true);
static SwitchOption interfaceChainOrderVetoScalesOff
(interfaceChainOrderVetoScales,
"Off",
"Switch off chain ordering for veto scales.",
false);
interfaceChainOrderVetoScales.rank(-1);
static Parameter<DipoleShowerHandler,unsigned int> interfaceNEmissions
("NEmissions",
"[debug option] Limit the number of emissions to be generated. Zero does not limit the number of emissions.",
&DipoleShowerHandler::nEmissions, 0, 0, 0,
false, false, Interface::lowerlim);
interfaceNEmissions.rank(-1);
static Switch<DipoleShowerHandler,bool> interfaceDiscardNoEmissions
("DiscardNoEmissions",
"[debug option] Discard events without radiation.",
&DipoleShowerHandler::discardNoEmissions, false, false, false);
static SwitchOption interfaceDiscardNoEmissionsOn
(interfaceDiscardNoEmissions,
"On",
"Discard events without radiation.",
true);
static SwitchOption interfaceDiscardNoEmissionsOff
(interfaceDiscardNoEmissions,
"Off",
"Do not discard events without radiation.",
false);
interfaceDiscardNoEmissions.rank(-1);
static Switch<DipoleShowerHandler,bool> interfaceFirstMCatNLOEmission
("FirstMCatNLOEmission",
"[debug option] Only perform the first MC@NLO emission.",
&DipoleShowerHandler::firstMCatNLOEmission, false, false, false);
static SwitchOption interfaceFirstMCatNLOEmissionOn
(interfaceFirstMCatNLOEmission,
"On",
"",
true);
static SwitchOption interfaceFirstMCatNLOEmissionOff
(interfaceFirstMCatNLOEmission,
"Off",
"",
false);
interfaceFirstMCatNLOEmission.rank(-1);
static Parameter<DipoleShowerHandler,int> interfaceVerbosity
("Verbosity",
"[debug option] Set the level of debug information provided.",
&DipoleShowerHandler::verbosity, 0, 0, 0,
false, false, Interface::lowerlim);
interfaceVerbosity.rank(-1);
static Parameter<DipoleShowerHandler,int> interfacePrintEvent
("PrintEvent",
"[debug option] The number of events for which debugging information should be provided.",
&DipoleShowerHandler::printEvent, 0, 0, 0,
false, false, Interface::lowerlim);
interfacePrintEvent.rank(-1);
static Parameter<DipoleShowerHandler,Energy> interfaceRenormalizationScaleFreeze
("RenormalizationScaleFreeze",
"The freezing scale for the renormalization scale.",
&DipoleShowerHandler::theRenormalizationScaleFreeze, GeV, 1.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Parameter<DipoleShowerHandler,Energy> interfaceFactorizationScaleFreeze
("FactorizationScaleFreeze",
"The freezing scale for the factorization scale.",
&DipoleShowerHandler::theFactorizationScaleFreeze, GeV, 2.0*GeV, 0.0*GeV, 0*GeV,
false, false, Interface::lowerlim);
static Switch<DipoleShowerHandler,bool> interfaceDoCompensate
("DoCompensate",
"",
&DipoleShowerHandler::theDoCompensate, false, false, false);
static SwitchOption interfaceDoCompensateYes
(interfaceDoCompensate,
"Yes",
"",
true);
static SwitchOption interfaceDoCompensateNo
(interfaceDoCompensate,
"No",
"",
false);
static Parameter<DipoleShowerHandler,unsigned long> interfaceFreezeGrid
("FreezeGrid",
"",
&DipoleShowerHandler::theFreezeGrid, 500000, 1, 0,
false, false, Interface::lowerlim);
static Parameter<DipoleShowerHandler,double> interfaceDetuning
("Detuning",
"A value to detune the overestimate kernel.",
&DipoleShowerHandler::theDetuning, 1.0, 1.0, 0,
false, false, Interface::lowerlim);
static Reference<DipoleShowerHandler,DipoleEventReweight> interfaceEventReweight
("EventReweight",
"",
&DipoleShowerHandler::theEventReweight, false, false, true, true, false);
static Reference<DipoleShowerHandler,DipoleSplittingReweight> interfaceSplittingReweight
("SplittingReweight",
"Set the splitting reweight.",
&DipoleShowerHandler::theSplittingReweight, false, false, true, true, false);
}
diff --git a/MatrixElement/Matchbox/Scales/MatchboxHtScale.cc b/MatrixElement/Matchbox/Scales/MatchboxHtScale.cc
--- a/MatrixElement/Matchbox/Scales/MatchboxHtScale.cc
+++ b/MatrixElement/Matchbox/Scales/MatchboxHtScale.cc
@@ -1,152 +1,164 @@
// -*- C++ -*-
//
// MatchboxHtScale.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 MatchboxHtScale class.
//
#include "MatchboxHtScale.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Interface/Reference.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"
using namespace Herwig;
MatchboxHtScale::MatchboxHtScale()
: theIncludeMT(false), theHTFactor(1.0),
- theMTFactor(1.0) {}
+ theMTFactor(1.0),theScalePtCut(15.*GeV) {}
MatchboxHtScale::~MatchboxHtScale() {}
IBPtr MatchboxHtScale::clone() const {
return new_ptr(*this);
}
IBPtr MatchboxHtScale::fullclone() const {
return new_ptr(*this);
}
Energy2 MatchboxHtScale::renormalizationScale() const {
tcPDVector pd (mePartonData().begin() + 2, mePartonData().end());
vector<LorentzMomentum> p (meMomenta().begin() + 2, meMomenta().end());
tcPDPtr t1 = mePartonData()[0];
tcPDPtr t2 = mePartonData()[1];
tcCutsPtr cuts = lastCutsPtr();
theJetFinder->cluster(pd, p, cuts, t1, t2);
initWeightFactors(pd,p,theJetFinder);
// momentum of the non-jet system
LorentzMomentum nonJetMomentum(ZERO,ZERO,ZERO,ZERO);
// (weighted) pt of the jet systems
Energy ptJetSum = ZERO;
bool gotone = false;
tcPDVector::const_iterator pdata = pd.begin();
vector<LorentzMomentum>::const_iterator mom = p.begin();
for ( ; mom != p.end(); ++pdata, ++mom ) {
- if ( theJetFinder->unresolvedMatcher()->check(**pdata) ) {
+
+ if ( theJetFinder->unresolvedMatcher()->check(**pdata)&&
+ mom->perp()>theScalePtCut){
+ //abs(mom->rapidity()+(!lastXCombPtr()->head()?lastXCombPtr()->lastY():lastXCombPtr()->head()->lastY()))<5.01
gotone = true;
ptJetSum += jetPtWeight(*mom)*mom->perp();
} else if ( theIncludeMT ) {
nonJetMomentum += *mom;
}
}
if ( !gotone && lastXCombPtr()->willPassCuts() )
throw Exception() << "MatchboxHtScale::renormalizationScale(): "
- << "No jets could be found. Check your setup."
- << Exception::runerror;
+ << "No jets could be found. Check your setup."
+ << "\nHint: The HT scale is defined with a PtMin cut on jets. (default:) "
+ << "\n set /Herwig/MatrixElements/Matchbox/ScalesHTScale:JetPtCut 15.*GeV "
+ << Exception::runerror;
+
Energy mtNonJetSum =
sqrt(nonJetMomentum.perp2() + nonJetMomentum.m2());
mtNonJetSum *= theMTFactor;
ptJetSum *= theHTFactor;
return sqr(ptJetSum + mtNonJetSum);
}
Energy2 MatchboxHtScale::factorizationScale() const {
return renormalizationScale();
}
// If needed, insert default implementations of virtual function defined
// in the InterfacedBase class here (using ThePEG-interfaced-impl in Emacs).
void MatchboxHtScale::persistentOutput(PersistentOStream & os) const {
- os << theJetFinder << theIncludeMT << theHTFactor << theMTFactor;
+ os << theJetFinder << theIncludeMT << theHTFactor << theMTFactor << ounit(theScalePtCut,GeV);
}
void MatchboxHtScale::persistentInput(PersistentIStream & is, int) {
- is >> theJetFinder >> theIncludeMT >> theHTFactor >> theMTFactor;
+ is >> theJetFinder >> theIncludeMT >> theHTFactor >> theMTFactor >> iunit(theScalePtCut,GeV);
}
// *** 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<MatchboxHtScale,MatchboxScaleChoice>
describeHerwigMatchboxHtScale("Herwig::MatchboxHtScale", "HwMatchboxScales.so");
void MatchboxHtScale::Init() {
static ClassDocumentation<MatchboxHtScale> documentation
("MatchboxHtScale implements scale choices related to transverse momenta.");
static Reference<MatchboxHtScale,JetFinder> interfaceJetFinder
("JetFinder",
"A reference to the jet finder.",
&MatchboxHtScale::theJetFinder, false, false, true, false, false);
static Switch<MatchboxHtScale,bool> interfaceIncludeMT
("IncludeMT",
"Include the transverse masses of the non-jet objects.",
&MatchboxHtScale::theIncludeMT, false, false, false);
static SwitchOption interfaceIncludeMTYes
(interfaceIncludeMT,
"Yes",
"",
true);
static SwitchOption interfaceIncludeMTNo
(interfaceIncludeMT,
"No",
"",
false);
static Parameter<MatchboxHtScale,double> interfaceHTFactor
("HTFactor",
"A factor to scale the HT contribution.",
&MatchboxHtScale::theHTFactor, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
static Parameter<MatchboxHtScale,double> interfaceMTFactor
("MTFactor",
"A factor to scale the MT contribution.",
&MatchboxHtScale::theMTFactor, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
+ static Parameter<MatchboxHtScale,Energy> interfaceScalePtCut
+ ("JetPtCut",
+ "The Pt cut to define jets in the sum.",
+ &MatchboxHtScale::theScalePtCut, 15.*GeV, 0.*GeV, 0.*GeV,
+ false, false, Interface::lowerlim);
+
}
diff --git a/MatrixElement/Matchbox/Scales/MatchboxHtScale.h b/MatrixElement/Matchbox/Scales/MatchboxHtScale.h
--- a/MatrixElement/Matchbox/Scales/MatchboxHtScale.h
+++ b/MatrixElement/Matchbox/Scales/MatchboxHtScale.h
@@ -1,155 +1,160 @@
// -*- C++ -*-
//
// MatchboxHtScale.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_MatchboxHtScale_H
#define Herwig_MatchboxHtScale_H
//
// This is the declaration of the MatchboxHtScale class.
//
#include "Herwig/MatrixElement/Matchbox/Utility/MatchboxScaleChoice.h"
#include "ThePEG/PDT/MatcherBase.h"
#include "ThePEG/Cuts/JetFinder.h"
namespace Herwig {
using namespace ThePEG;
/**
* \ingroup Matchbox
* \author Simon Platzer
*
* \brief MatchboxHtScale implements scale choices related to transverse momenta.
*
*/
class MatchboxHtScale: public MatchboxScaleChoice {
public:
/** @name Standard constructors and destructors. */
//@{
/**
* The default constructor.
*/
MatchboxHtScale();
/**
* The destructor.
*/
virtual ~MatchboxHtScale();
//@}
public:
/**
* Return the renormalization scale. This default version returns
* shat.
*/
virtual Energy2 renormalizationScale() const;
/**
* Return the factorization scale. This default version returns
* shat.
*/
virtual Energy2 factorizationScale() const;
protected:
/**
* Initialize potential weighting factors for the given final state
*/
virtual void initWeightFactors(const tcPDVector&, const vector<LorentzMomentum>&,
const Ptr<JetFinder>::ptr&) const {}
/**
* Return the jet pt weighting factor for the given jet
*/
virtual double jetPtWeight(const LorentzMomentum&) const { return 1.; }
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;
//@}
private:
/**
* Reference to the jet finder
*/
Ptr<JetFinder>::ptr theJetFinder;
/**
* Include the transverse masses of the non-jet objects
*/
bool theIncludeMT;
/**
* An ovewrall scaling factor for the jet contribution
*/
double theHTFactor;
/**
* An ovewrall scaling factor for the non-jet contribution
*/
double theMTFactor;
+
+ /**
+ * We define jets as clustered objects with a minimum pT
+ */
+ Energy theScalePtCut;
// If needed, insert declarations of virtual function defined in the
// InterfacedBase class here (using ThePEG-interfaced-decl in Emacs).
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
MatchboxHtScale & operator=(const MatchboxHtScale &);
};
}
#endif /* Herwig_MatchboxHtScale_H */
diff --git a/PDT/StandardMatchers.cc b/PDT/StandardMatchers.cc
--- a/PDT/StandardMatchers.cc
+++ b/PDT/StandardMatchers.cc
@@ -1,32 +1,33 @@
// -*- C++ -*-
//
// StandardMatchers.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.
//
//
// Ensures the StandardMatchers get created
//
#include "ThePEG/PDT/Matcher.h"
#include "ThePEG/PDT/StandardMatchers.h"
#include "StandardMatchers.h"
using namespace Herwig;
using namespace ThePEG;
namespace {
void dummy() {
static MatchPhoton m00;
- static MatchTop m01;
- static MatchHadron m02;
- static MatchWBoson m03;
- static MatchZBoson m04;
- static MatchHiggsBoson m05;
- static MatchChargedLepton m06;
+ static MatchBottom m01;
+ static MatchTop m02;
+ static MatchHadron m03;
+ static MatchWBoson m04;
+ static MatchZBoson m05;
+ static MatchHiggsBoson m06;
+ static MatchChargedLepton m07;
}
}
diff --git a/PDT/StandardMatchers.h b/PDT/StandardMatchers.h
--- a/PDT/StandardMatchers.h
+++ b/PDT/StandardMatchers.h
@@ -1,190 +1,210 @@
// -*- C++ -*-
//
// StandardMatchers.h 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.
//
#ifndef Herwig_StandardMatchers_H
#define Herwig_StandardMatchers_H
// This is the declaration of the AnyMatcher,
#include "ThePEG/PDT/Matcher.h"
#include "ThePEG/Repository/CurrentGenerator.h"
#include "ThePEG/PDF/BeamParticleData.h"
#include "ThePEG/PDT/EnumParticles.h"
namespace Herwig {
using namespace ThePEG;
/**
*
* This file declare a set of standard matcher classes in addition to those
* defined in ThePEG. The classes can be used by themselves (with
* their static functions) or together with the Matcher class to
* define Interfaced objects of the MatcherBase type to be used in the
* Repository. Suitable typedefs are declared for the latter.
*
* @see Matcher
* @see MatcherBase
*/
/**
* A Matcher class which matches photons
*/
struct PhotonMatcher: public MatcherType {
/** Typedef the class matching the complex conjugate particles. */
typedef PhotonMatcher CC;
/** The main static function to check if a given particle type \a pd
matches. */
static bool Check(const ParticleData & pd) {
return pd.id()==ParticleID::gamma;
}
/** A simplified but unique class name. */
static string className() { return "Photon"; }
};
/**
* Gives a MatcherBase class based on PhotonMatcher.
*/
typedef Matcher<PhotonMatcher> MatchPhoton;
/**
* A Matcher class which matches top quarks
*/
struct TopMatcher: public MatcherType {
/** Typedef the class matching the complex conjugate particles. */
typedef TopMatcher CC;
/** The main static function to check if a given particle type \a pd
matches. */
static bool Check(const ParticleData & pd) {
return abs(pd.id())==ParticleID::t;
}
/** A simplified but unique class name. */
static string className() { return "Top"; }
};
/**
* Gives a MatcherBase class based on TopMatcher.
*/
typedef Matcher<TopMatcher> MatchTop;
/**
+ * A Matcher class which matches bottom quarks
+ */
+struct BottomMatcher: public MatcherType {
+ /** Typedef the class matching the complex conjugate particles. */
+ typedef BottomMatcher CC;
+ /** The main static function to check if a given particle type \a pd
+ matches. */
+ static bool Check(const ParticleData & pd) {
+ return abs(pd.id())==ParticleID::b;
+ }
+ /** A simplified but unique class name. */
+ static string className() { return "Bottom"; }
+};
+
+/**
+ * Gives a MatcherBase class based on BottomMatcher.
+ */
+typedef Matcher<BottomMatcher> MatchBottom;
+
+/**
* A Matcher class which matches any hadron.
*/
struct HadronMatcher: public MatcherType {
/** Typedef the class matching the complex conjugate particles. */
typedef HadronMatcher CC;
/** The main static function to check if a given particle type \a pd
matches. */
static bool Check(const ParticleData & pd) {
if (pd.id() != ParticleID::gamma) return Check(pd.id());
else {
Ptr<BeamParticleData>::const_pointer beam =
dynamic_ptr_cast< Ptr<BeamParticleData>::const_pointer>(&pd);
return beam && beam->pdf();
}
}
/** The main static function to check if a given particle with type
\a id matches. */
static bool Check(long id) {
bool hadron = (id/10)%10 && (id/100)%10;
if(hadron) return true;
// special for gamma when acting like a hadron
if (id != ParticleID::gamma) return false;
tcPDPtr gamma = CurrentGenerator::current().getParticleData(ParticleID::gamma);
Ptr<BeamParticleData>::const_pointer beam =
dynamic_ptr_cast< Ptr<BeamParticleData>::const_pointer>(gamma);
return beam && beam->pdf();
}
/** A simplified but unique class name. */
static string className() { return "Hadron"; }
};
/** Gives a MatcherBase class based on HadronMatcher. */
typedef Matcher<HadronMatcher> MatchHadron;
/**
* A Matcher class which matches W bosons
*/
struct WBosonMatcher: public MatcherType {
/** Typedef the class matching the complex conjugate particles. */
typedef WBosonMatcher CC;
/** The main static function to check if a given particle type \a pd
matches. */
static bool Check(const ParticleData & pd) {
return abs(pd.id())==ParticleID::Wplus;
}
/** A simplified but unique class name. */
static string className() { return "WBoson"; }
};
/**
* Gives a MatcherBase class based on WBosonMatcher.
*/
typedef Matcher<WBosonMatcher> MatchWBoson;
/**
* A Matcher class which matches Z bosons
*/
struct ZBosonMatcher: public MatcherType {
/** Typedef the class matching the complex conjugate particles. */
typedef ZBosonMatcher CC;
/** The main static function to check if a given particle type \a pd
matches. */
static bool Check(const ParticleData & pd) {
return abs(pd.id())==ParticleID::Z0;
}
/** A simplified but unique class name. */
static string className() { return "ZBoson"; }
};
/**
* Gives a MatcherBase class based on ZBosonMatcher.
*/
typedef Matcher<ZBosonMatcher> MatchZBoson;
/**
* A Matcher class which matches Higgs bosons
*/
struct HiggsBosonMatcher: public MatcherType {
/** Typedef the class matching the complex conjugate particles. */
typedef HiggsBosonMatcher CC;
/** The main static function to check if a given particle type \a pd
matches. */
static bool Check(const ParticleData & pd) {
return abs(pd.id())==ParticleID::h0;
}
/** A simplified but unique class name. */
static string className() { return "HiggsBoson"; }
};
/**
* Gives a MatcherBase class based on HiggsBosonMatcher.
*/
typedef Matcher<HiggsBosonMatcher> MatchHiggsBoson;
/**
* A Matcher class which matches any charged lepton.
*/
struct ChargedLeptonMatcher: public MatcherType {
/** Typedef the class matching the complex conjugate particles. */
typedef ChargedLeptonMatcher CC;
/** The main static function to check if a given particle type \a pd
matches. */
static bool Check(const ParticleData & pd) {
return Check(pd.id());
}
static bool Check(long id) {
return abs(id) > 10 && abs(id) <= 20 && abs(id)%2!=0;
}
/** A simplified but unique class name. */
static string className() { return "ChargedLepton"; }
};
/** Gives a MatcherBase class based on ChargedLeptonMatcher. */
typedef Matcher<ChargedLeptonMatcher> MatchChargedLepton;
}
#endif /* Herwig_StandardMatchers_H */
diff --git a/Shower/Base/Evolver.cc b/Shower/Base/Evolver.cc
--- a/Shower/Base/Evolver.cc
+++ b/Shower/Base/Evolver.cc
@@ -1,3222 +1,3299 @@
// -*- 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/Handlers/StandardEventHandler.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
+ << _vetoes << _fullShowerVetoes << _nReWeight << _reWeight
+ << _trunc_Mode << _hardEmissionMode << _reconOpt
<< _massVetoOption << 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
+ >> _vetoes >> _fullShowerVetoes >> _nReWeight >> _reWeight
+ >> _trunc_Mode >> _hardEmissionMode >> _reconOpt
>> _massVetoOption >> 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())));
+ // check on the reweighting
+ for(unsigned int ix=0;ix<_fullShowerVetoes.size();++ix) {
+ if(_fullShowerVetoes[ix]->behaviour()==1) {
+ _reWeight = true;
+ break;
+ }
+ }
+ if(_reWeight && maximumTries()<_nReWeight) {
+ throw Exception() << "Reweight being performed in the shower but the number of attempts for the"
+ << "shower is less than that for the reweighting.\n"
+ << "Maximum number of attempt for the shower "
+ << fullName() << ":MaxTry is " << maximumTries() << "\nand for reweighting is "
+ << fullName() << ":NReWeight is " << _nReWeight << "\n"
+ << "we recommend the number of attempts is 10 times the number for reweighting\n"
+ << Exception::runerror;
+ }
}
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,
+ &Evolver::_maxtry, 100, 1, 100000,
+ false, false, Interface::limited);
+
+ static Parameter<Evolver,unsigned int> interfaceNReWeight
+ ("NReWeight",
+ "The number of attempts for the shower when reweighting",
+ &Evolver::_nReWeight, 100, 10, 10000,
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 RefVector<Evolver,FullShowerVeto> interfaceFullShowerVetoes
+ ("FullShowerVetoes",
+ "The vetos to be appliede on the full final state of the shower",
+ &Evolver::_fullShowerVetoes, -1, false, false, true, false, 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",
1);
static SwitchOption interfaceReconstructionOptionOffShell2
(interfaceReconstructionOption,
"OffShell2",
"Use the off-shell masses in the calculation but only locally for each branching",
2);
static Switch<Evolver,unsigned int> interfaceMassVetoOption
("MassVetoOption",
"Option for the handling of the mass vetos",
&Evolver::_massVetoOption, 1, false, false);
static SwitchOption interfaceMassVetoOptionReset
(interfaceMassVetoOption,
"Reset",
"Try another branching without resetting the starting scale",
0);
static SwitchOption interfaceMassVetoOptionInclude
(interfaceMassVetoOption,
"Include",
"Include the veto in the scale generation via the veto algorithm",
1);
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->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->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->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);
}
}
}
Branching Evolver::selectTimeLikeBranching(tShowerParticlePtr particle,
ShowerInteraction::Type type) {
Branching fb;
while (true) {
fb=_splittingGenerator->chooseForwardBranching(*particle,_finalenhance,type);
// no emission return
if(!fb.kinematics) return fb;
// if emission OK break
if(!timeLikeVetoed(fb,particle)) break;
// otherwise reset scale and continue - SO IS involved in veto algorithm
particle->vetoEmission(fb.type,fb.kinematics->scale());
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
}
return fb;
}
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;
while (ntry<50) {
++ntry;
// generate the emission
if(!fb.kinematics)
fb = selectTimeLikeBranching(particle,type);
// no emission, return
if(!fb.kinematics) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
// has emitted
// Assign the shower kinematics to the emitting particle.
++_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);
// 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;
}
// select branchings for children
Branching fc[2] = {selectTimeLikeBranching(children[0],type),
selectTimeLikeBranching(children[1],type)};
// old recon option
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();
}
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());
if(_massVetoOption==1) particle->vetoEmission(fb.type,fb.kinematics->scale());
fb = Branching();
continue;
}
}
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) {
// branching has happened
particle->showerKinematics()->
updateParent(particle, children,fb.type);
// 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();
}
else {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
if(_massVetoOption==1) particle->vetoEmission(fb.type,fb.kinematics->scale());
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
fb = Branching();
continue;
}
}
break;
};
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);
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;
while (true) {
fb=_splittingGenerator->chooseDecayBranching(*particle,maxScales,minmass,
_initialenhance,type);
// return if no radiation
if(!fb.kinematics) return false;
// if not vetoed break
if(!spaceLikeDecayVetoed(fb,particle)) break;
// otherwise reset scale and continue
particle->vetoEmission(fb.type,fb.kinematics->scale());
}
// has emitted
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// For the time being we are considering only 1->2 branching
// 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(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;
}
}
ShowerParticleVector theChildren;
for(unsigned int ix=0;ix<2;++ix) {
theChildren.push_back(new_ptr(ShowerParticle(pdata[ix],true)));
if(theChildren[ix]->id()==_progenitor->id()&&!pdata[ix]->stable())
theChildren[ix]->set5Momentum(Lorentz5Momentum(_progenitor->progenitor()->mass()));
else
theChildren[ix]->set5Momentum(Lorentz5Momentum(pdata[ix]->mass()));
}
// some code moved to updateChildren
particle->showerKinematics()->
updateChildren(particle, theChildren, fb.type);
// 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,theChildren[0]);
_currenttree->addInitialStateBranching(particle,theChildren[0],theChildren[1]);
// shower the first particle
spaceLikeDecayShower(theChildren[0],maxScales,minmass,type);
// shower the second particle
timeLikeShower(theChildren[1],type,Branching(),true);
updateHistory(theChildren[1]);
// 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,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) {
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);
}
}
return hardOnly() ? false :
spaceLikeDecayShower(progenitor()->progenitor(),maxScales,minimumMass,type);
}
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()->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,bool first) {
int ntry=0;
do {
++ntry;
Branching fb;
unsigned int iout=0;
tcPDPtr pdata[2];
while (true) {
// no truncated shower break
if(!isTruncatedShowerON()||hardOnly()) break;
// generate emission
fb=splittingGenerator()->chooseForwardBranching(*particle,1.,type);
// no emission break
if(!fb.kinematics) break;
// 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;
}
// should do base class vetos as well
if(timeLikeVetoed(fb,particle)) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
break;
}
// if no branching force truncated emission
if(!fb.kinematics) {
// 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() );
// Assign the shower kinematics to the emitting particle.
++_nFSR;
particle->showerKinematics( fb.kinematics );
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// Assign the splitting function to the emitting particle.
// For the time being we are considering only 1->2 branching
// 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
ShowerParticleVector theChildren;
for(unsigned int ix=0;ix<2;++ix) {
theChildren.push_back(new_ptr(ShowerParticle(branch->children()[ix]->
branchingParticle()->dataPtr(),true)));
if(theChildren[ix]->id()==_progenitor->id()&&!theChildren[ix]->dataPtr()->stable())
theChildren[ix]->set5Momentum(Lorentz5Momentum(_progenitor->progenitor()->mass()));
else
theChildren[ix]->set5Momentum(Lorentz5Momentum(theChildren[ix]->dataPtr()->mass()));
}
particle->showerKinematics()->
updateChildren(particle, theChildren,fb.type);
for(unsigned int ix=0;ix<2;++ix) {
theChildren[ix]->scales().QED = min(theChildren[ix]->scales().QED ,particle->scales().QED );
theChildren[ix]->scales().QED_noAO = min(theChildren[ix]->scales().QED_noAO ,particle->scales().QED_noAO );
theChildren[ix]->scales().QCD_c = min(theChildren[ix]->scales().QCD_c ,particle->scales().QCD_c );
theChildren[ix]->scales().QCD_c_noAO = min(theChildren[ix]->scales().QCD_c_noAO ,particle->scales().QCD_c_noAO );
theChildren[ix]->scales().QCD_ac = min(theChildren[ix]->scales().QCD_ac ,particle->scales().QCD_ac );
theChildren[ix]->scales().QCD_ac_noAO = min(theChildren[ix]->scales().QCD_ac_noAO,particle->scales().QCD_ac_noAO);
}
// shower the first particle
if( branch->children()[0]->children().empty() ) {
if( ! hardOnly() )
timeLikeShower(theChildren[0],type,Branching(),false);
}
else {
truncatedTimeLikeShower( theChildren[0],branch->children()[0],type,false);
}
// shower the second particle
if( branch->children()[1]->children().empty() ) {
if( ! hardOnly() )
timeLikeShower( theChildren[1] , type,Branching(),false);
}
else {
truncatedTimeLikeShower( theChildren[1],branch->children()[1] ,type,false);
}
// that's if for old approach
if(_reconOpt==0) return true;
// branching has happened
particle->showerKinematics()->updateParent(particle, theChildren,fb.type);
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<theChildren.size();++ix)
particle->abandonChild(theChildren[ix]);
theChildren.clear();
continue;
}
else {
if(first&&!theChildren.empty())
particle->showerKinematics()->resetChildren(particle,theChildren);
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
}
// has emitted
// Assign the shower kinematics to the emitting particle.
++_nFSR;
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// Assign the splitting function to the emitting particle.
// For the time being we are considering only 1->2 branching
// 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
ShowerParticleVector theChildren;
for(unsigned int ix=0;ix<2;++ix) {
theChildren.push_back( new_ptr( ShowerParticle( pdata[ix], true ) ) );
if(theChildren[ix]->id()==_progenitor->id()&&!pdata[ix]->stable())
theChildren[ix]->set5Momentum(Lorentz5Momentum(_progenitor->progenitor()->mass()));
else
theChildren[ix]->set5Momentum(Lorentz5Momentum(pdata[ix]->mass()));
}
particle->showerKinematics()->
updateChildren( particle, theChildren , fb.type);
// shower the first particle
if( iout == 1 ) truncatedTimeLikeShower( theChildren[0], branch , type ,false);
else timeLikeShower( theChildren[0] , type,Branching(),false);
// shower the second particle
if( iout == 2 ) truncatedTimeLikeShower( theChildren[1], branch , type ,false);
else timeLikeShower( theChildren[1] , type,Branching(),false);
// that's if for old approach
if(_reconOpt==0) return true;
// branching has happened
particle->showerKinematics()->updateParent(particle, theChildren,fb.type);
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<theChildren.size();++ix)
particle->abandonChild(theChildren[ix]);
theChildren.clear();
}
else {
if(first&&!theChildren.empty())
particle->showerKinematics()->resetChildren(particle,theChildren);
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
}
while(ntry<50);
return false;
}
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);
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,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);
// 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;
unsigned int iout=0;
tcPDPtr pdata[2];
while (true) {
// no truncated shower break
if(!isTruncatedShowerON()||hardOnly()) break;
fb=splittingGenerator()->chooseDecayBranching(*particle,maxScales,minmass,1.,type);
// return if no radiation
if(!fb.kinematics) break;
// 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;
}
// should do base class vetos as well
// if not vetoed break
if(!spaceLikeDecayVetoed(fb,particle)) break;
// otherwise reset scale and continue
particle->vetoEmission(fb.type,fb.kinematics->scale());
}
// this may not be currently used but in principle could be
// and should be included
if (!fb.kinematics) {
// 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 );
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics( fb.kinematics );
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// Assign the splitting function to the emitting particle.
// For the time being we are considering only 1->2 branching
// 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
ShowerParticleVector theChildren;
theChildren.push_back(new_ptr(ShowerParticle(branch->children()[0]->
branchingParticle()->dataPtr(),true)));
theChildren.push_back(new_ptr(ShowerParticle(branch->children()[1]->
branchingParticle()->dataPtr(),true)));
particle->showerKinematics()->
updateChildren(particle, theChildren,fb.type);
if(theChildren[0]->id()==particle->id()) {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),theChildren[0]);
currentTree()->addInitialStateBranching(particle,theChildren[0],theChildren[1]);
// shower the space-like particle
if( branch->children()[0]->children().empty() ) {
if( ! hardOnly() ) spaceLikeDecayShower(theChildren[0],maxScales,minmass,type);
}
else {
truncatedSpaceLikeDecayShower( theChildren[0],maxScales,minmass,
branch->children()[0],type);
}
// shower the second particle
if( branch->children()[1]->children().empty() ) {
if( ! hardOnly() ) timeLikeShower( theChildren[1] , type,Branching(), true);
}
else {
truncatedTimeLikeShower( theChildren[1],branch->children()[1] ,type,true);
}
updateHistory(theChildren[1]);
}
else {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),theChildren[1]);
currentTree()->addInitialStateBranching(particle,theChildren[0],theChildren[1]);
// shower the space-like particle
if( branch->children()[1]->children().empty() ) {
if( ! hardOnly() ) spaceLikeDecayShower(theChildren[1],maxScales,minmass,type);
}
else {
truncatedSpaceLikeDecayShower( theChildren[1],maxScales,minmass,
branch->children()[1],type);
}
// shower the second particle
if( branch->children()[0]->children().empty() ) {
if( ! hardOnly() ) timeLikeShower( theChildren[0] , type, Branching(),true);
}
else {
truncatedTimeLikeShower( theChildren[0],branch->children()[0] ,type,true);
}
updateHistory(theChildren[0]);
}
return true;
}
// has emitted
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// For the time being we are considering only 1->2 branching
// 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
ShowerParticleVector theChildren;
theChildren.push_back(new_ptr(ShowerParticle(pdata[0],true)));
theChildren.push_back(new_ptr(ShowerParticle(pdata[1],true)));
particle->showerKinematics()->updateChildren(particle, theChildren,fb.type);
// 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(),theChildren[0]);
currentTree()->addInitialStateBranching(particle,theChildren[0],theChildren[1]);
// shower the first particle
truncatedSpaceLikeDecayShower(theChildren[0],maxScales,minmass,branch,type);
// shower the second particle
timeLikeShower(theChildren[1],type,Branching(),true);
updateHistory(theChildren[1]);
// branching has happened
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
+ bool reWeighting = _reWeight && hard && ShowerHandler::currentHandler()->firstInteraction();
+ double eventWeight=0.;
+ unsigned int nTryReWeight(0);
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]);
+ if(!reconstructed) continue;
+ // apply vetos on the full shower
+ for(vector<FullShowerVetoPtr>::const_iterator it=_fullShowerVetoes.begin();
+ it!=_fullShowerVetoes.end();++it) {
+ int veto = (**it).applyVeto(currentTree());
+ if(veto<0) continue;
+ // veto the shower
+ if(veto==0) {
+ reconstructed = false;
+ break;
+ }
+ // veto the shower and reweight
+ else if(veto==1) {
+ reconstructed = false;
+ break;
+ }
+ // veto the event
+ else if(veto==2) {
+ throw Veto();
+ }
+ }
+ if(reWeighting) {
+ if(reconstructed) eventWeight += 1.;
+ reconstructed=false;
+ ++nTryReWeight;
+ if(nTryReWeight==_nReWeight) {
+ reWeighting = false;
+ if(eventWeight==0.) throw Veto();
+ }
+ }
}
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;
}
}
+ // handle the weights and apply any reweighting required
+ if(nTryReWeight>0) {
+ tStdEHPtr seh = dynamic_ptr_cast<tStdEHPtr>(generator()->currentEventHandler());
+ static bool first = true;
+ if(seh) {
+ seh->reweight(eventWeight/double(nTryReWeight));
+ }
+ else if(first) {
+ generator()->log() << "Reweighting the shower only works with internal Herwig7 processes"
+ << "Presumably you are showering Les Houches Events. These will not be"
+ << "reweighted\n";
+ first = false;
+ }
+ }
// 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);
}
diff --git a/Shower/Base/Evolver.h b/Shower/Base/Evolver.h
--- a/Shower/Base/Evolver.h
+++ b/Shower/Base/Evolver.h
@@ -1,946 +1,964 @@
// -*- C++ -*-
//
// Evolver.h 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.
//
#ifndef HERWIG_Evolver_H
#define HERWIG_Evolver_H
//
// This is the declaration of the Evolver class.
//
#include "ThePEG/Interface/Interfaced.h"
#include "Herwig/Shower/SplittingFunctions/SplittingGenerator.h"
#include "ShowerModel.h"
#include "ThePEG/PDF/BeamParticleData.h"
#include "ShowerTree.h"
#include "ShowerProgenitor.fh"
#include "Herwig/Shower/ShowerHandler.fh"
#include "Branching.h"
#include "ShowerVeto.h"
+#include "FullShowerVeto.h"
#include "HardTree.h"
#include "ThePEG/Handlers/XComb.h"
#include "Evolver.fh"
#include "Herwig/MatrixElement/HwMEBase.h"
#include "Herwig/Decay/HwDecayerBase.h"
#include "Herwig/MatrixElement/Matchbox/Matching/ShowerApproximation.h"
+#include "Herwig/Utilities/Statistic.h"
namespace Herwig {
using namespace ThePEG;
/**\ingroup Shower
* Exception class
* used to communicate failure of QED shower
*/
struct InteractionVeto {};
/** \ingroup Shower
* The Evolver class class performs the sohwer evolution of hard scattering
* and decay processes in Herwig.
*
* @see \ref EvolverInterfaces "The interfaces"
* defined for Evolver.
*/
class Evolver: public Interfaced {
/**
* The ShowerHandler is a friend to set some parameters at initialisation
*/
friend class ShowerHandler;
public:
/**
* Pointer to an XComb object
*/
typedef Ptr<XComb>::pointer XCPtr;
public:
/**
* Default Constructor
*/
Evolver() : _maxtry(100), _meCorrMode(1), _hardVetoMode(1),
_hardVetoRead(0), _reconOpt(0),
_massVetoOption(1), _hardVetoReadOption(false),
_iptrms(ZERO), _beta(0.), _gamma(ZERO), _iptmax(),
_limitEmissions(0), _initialenhance(1.), _finalenhance(1.),
+ _nReWeight(100), _reWeight(false),
interaction_(1), _trunc_Mode(true), _hardEmissionMode(0),
_spinOpt(1), _softOpt(2), _hardPOWHEG(false),
theFactorizationScaleFactor(1.0),
theRenormalizationScaleFactor(1.0), muPt(ZERO),
_maxTryFSR(100000),_maxFailFSR(100),_fracFSR(0.001),
_nFSR(0), _nFailedFSR(0)
{}
/**
* Members to perform the shower
*/
//@{
/**
* Perform the shower of the hard process
*/
virtual void showerHardProcess(ShowerTreePtr,XCPtr);
/**
* Perform the shower of a decay
*/
virtual void showerDecay(ShowerTreePtr);
//@}
/**
* Access to the flags and shower variables
*/
//@{
/**
* Is there any showering switched on
*/
bool showeringON() const { return isISRadiationON() || isFSRadiationON(); }
/**
* It returns true/false if the initial-state radiation is on/off.
*/
bool isISRadiationON() const { return _splittingGenerator->isISRadiationON(); }
/**
* It returns true/false if the final-state radiation is on/off.
*/
bool isFSRadiationON() const { return _splittingGenerator->isFSRadiationON(); }
/**
* Get the ShowerModel
*/
ShowerModelPtr showerModel() const {return _model;}
/**
* Get the SplittingGenerator
*/
tSplittingGeneratorPtr splittingGenerator() const { return _splittingGenerator; }
/**
* Mode for hard emissions
*/
int hardEmissionMode() const {return _hardEmissionMode;}
/**
* Switch on or off hard vetoes
*/
void restrictPhasespace(bool yes) {
if ( yes )
_hardVetoMode = 1;
else
_hardVetoMode = 0;
}
/**
* Switch on or off hard veto scale from muF
*/
void hardScaleIsMuF(bool yes) {
if ( yes )
_hardVetoRead = 1;
else
_hardVetoRead = 0;
}
//@}
/**
* Connect the Hard and Shower trees
*/
virtual void connectTrees(ShowerTreePtr showerTree, HardTreePtr hardTree, bool hard );
/**
* Access to switches for spin correlations
*/
//@{
/**
* Spin Correlations
*/
unsigned int spinCorrelations() const {
return _spinOpt;
}
/**
* Soft correlations
*/
unsigned int softCorrelations() const {
return _softOpt;
}
/**
* Any correlations
*/
bool correlations() const {
return _spinOpt!=0||_softOpt!=0;
}
//@}
/**
* Set the factorization scale factor
*/
void factorizationScaleFactor(double f) {
if ( f == theFactorizationScaleFactor )
return;
theFactorizationScaleFactor = f;
splittingGenerator()->factorizationScaleFactor(f);
}
/**
* Set the renormalization scale factor
*/
void renormalizationScaleFactor(double f) {
if ( f == theRenormalizationScaleFactor )
return;
theRenormalizationScaleFactor = f;
splittingGenerator()->renormalizationScaleFactor(f);
}
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:
/**
* Perform the shower
*/
void doShowering(bool hard,XCPtr);
/**
* Generate the hard matrix element correction
*/
virtual void hardMatrixElementCorrection(bool);
/**
* Generate the hardest emission
*/
virtual void hardestEmission(bool hard);
/**
* Extract the particles to be showered, set the evolution scales
* and apply the hard matrix element correction
* @param hard Whether this is a hard process or decay
* @return The particles to be showered
*/
virtual vector<ShowerProgenitorPtr> setupShower(bool hard);
/**
* set the colour partners
*/
virtual void setEvolutionPartners(bool hard,ShowerInteraction::Type,
bool clear);
/**
* Methods to perform the evolution of an individual particle, including
* recursive calling on the products
*/
//@{
/**
* It does the forward evolution of the time-like input particle
* (and recursively for all its radiation products).
* accepting only emissions which conforms to the showerVariables
* and soft matrix element correction.
* If at least one emission has occurred then the method returns true.
* @param particle The particle to be showered
*/
virtual bool timeLikeShower(tShowerParticlePtr particle, ShowerInteraction::Type,
Branching fb, bool first);
/**
* It does the backward evolution of the space-like input particle
* (and recursively for all its time-like radiation products).
* accepting only emissions which conforms to the showerVariables.
* If at least one emission has occurred then the method returns true
* @param particle The particle to be showered
* @param beam The beam particle
*/
virtual bool spaceLikeShower(tShowerParticlePtr particle,PPtr beam,
ShowerInteraction::Type);
/**
* If does the forward evolution of the input on-shell particle
* involved in a decay
* (and recursively for all its time-like radiation products).
* accepting only emissions which conforms to the showerVariables.
* @param particle The particle to be showered
* @param maxscale The maximum scale for the shower.
* @param minimumMass The minimum mass of the final-state system
*/
virtual bool
spaceLikeDecayShower(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minimumMass,ShowerInteraction::Type);
/**
* Truncated shower from a time-like particle
*/
virtual bool truncatedTimeLikeShower(tShowerParticlePtr particle,
HardBranchingPtr branch,
ShowerInteraction::Type type, bool first);
/**
* Truncated shower from a space-like particle
*/
virtual bool truncatedSpaceLikeShower(tShowerParticlePtr particle,PPtr beam,
HardBranchingPtr branch,
ShowerInteraction::Type type);
/**
* Truncated shower from a time-like particle
*/
virtual bool truncatedSpaceLikeDecayShower(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minimumMass, HardBranchingPtr branch,
ShowerInteraction::Type type);
//@}
/**
* Switches for matrix element corrections
*/
//@{
/**
* Any ME correction?
*/
bool MECOn(bool hard) const {
return ( _hardEmissionMode == 0 ||
(!hard && _hardEmissionMode ==-1) ) &&
_meCorrMode > 0;
}
/**
* Any hard ME correction?
*/
bool hardMEC(bool hard) const {
return ( _hardEmissionMode == 0 ||
(!hard && _hardEmissionMode ==-1) ) &&
(_meCorrMode == 1 || _meCorrMode == 2);
}
/**
* Any soft ME correction?
*/
bool softMEC() const {
return ( _hardEmissionMode == 0 ||
(_currenttree->isDecay() && _hardEmissionMode ==-1) ) &&
(_meCorrMode == 1 || _meCorrMode > 2);
}
//@}
/**
* Is the truncated shower on?
*/
bool isTruncatedShowerON() const {return _trunc_Mode;}
/**
* Switch for intrinsic pT
*/
//@{
/**
* Any intrinsic pT?
*/
bool ipTon() const {
return _iptrms != ZERO || ( _beta == 1.0 && _gamma != ZERO && _iptmax !=ZERO );
}
//@}
/**@name Additional shower vetoes */
//@{
/**
* Insert a veto.
*/
void addVeto (ShowerVetoPtr v) { _vetoes.push_back(v); }
/**
* Remove a veto.
*/
void removeVeto (ShowerVetoPtr v) {
vector<ShowerVetoPtr>::iterator vit = find(_vetoes.begin(),_vetoes.end(),v);
if (vit != _vetoes.end())
_vetoes.erase(vit);
}
//@}
/**
* Switches for vetoing hard emissions
*/
//@{
/**
* Vetos on?
*/
bool hardVetoOn() const { return _hardVetoMode > 0; }
/**
* veto hard emissions in IS shower?
*/
bool hardVetoIS() const { return _hardVetoMode == 1 || _hardVetoMode == 2; }
/**
* veto hard emissions in FS shower?
*/
bool hardVetoFS() const { return _hardVetoMode == 1 || _hardVetoMode > 2; }
/**
* veto hard emissions according to lastScale from XComb?
*/
bool hardVetoXComb() const {return (_hardVetoRead == 1);}
/**
* Returns true if the hard veto read-in is to be applied to only
* the primary collision and false otherwise.
*/
bool hardVetoReadOption() const {return _hardVetoReadOption;}
//@}
/**
* Enhancement factors for radiation needed to generate the soft matrix
* element correction.
*/
//@{
/**
* Access the enhancement factor for initial-state radiation
*/
double initialStateRadiationEnhancementFactor() const { return _initialenhance; }
/**
* Access the enhancement factor for final-state radiation
*/
double finalStateRadiationEnhancementFactor() const { return _finalenhance; }
/**
* Set the enhancement factor for initial-state radiation
*/
void initialStateRadiationEnhancementFactor(double in) { _initialenhance=in; }
/**
* Set the enhancement factor for final-state radiation
*/
void finalStateRadiationEnhancementFactor(double in) { _finalenhance=in; }
//@}
/**
* Access to set/get the HardTree currently beinging showered
*/
//@{
/**
* The HardTree currently being showered
*/
tHardTreePtr hardTree() {return _hardtree;}
/**
* The HardTree currently being showered
*/
void hardTree(tHardTreePtr in) {_hardtree = in;}
//@}
/**
* Access/set the beam particle for the current initial-state shower
*/
//@{
/**
* Get the beam particle data
*/
Ptr<BeamParticleData>::const_pointer beamParticle() const { return _beam; }
/**
* Set the beam particle data
*/
void setBeamParticle(Ptr<BeamParticleData>::const_pointer in) { _beam=in; }
//@}
/**
* Set/Get the current tree being evolverd for inheriting classes
*/
//@{
/**
* Get the tree
*/
tShowerTreePtr currentTree() { return _currenttree; }
/**
* Set the tree
*/
void currentTree(tShowerTreePtr tree) { _currenttree=tree; }
//@}
/**
* Access the maximum number of attempts to generate the shower
*/
unsigned int maximumTries() const { return _maxtry; }
/**
* Set/Get the ShowerProgenitor for the current shower
*/
//@{
/**
* Access the progenitor
*/
ShowerProgenitorPtr progenitor() { return _progenitor; }
/**
* Set the progenitor
*/
void progenitor(ShowerProgenitorPtr in) { _progenitor=in; }
//@}
/**
* Calculate the intrinsic \f$p_T\f$.
*/
virtual void generateIntrinsicpT(vector<ShowerProgenitorPtr>);
/**
* Access to the intrinsic \f$p_T\f$ for inheriting classes
*/
map<tShowerProgenitorPtr,pair<Energy,double> > & intrinsicpT() { return _intrinsic; }
/**
* find the maximally allowed pt acc to the hard process.
*/
void setupMaximumScales(const vector<ShowerProgenitorPtr> &,XCPtr);
/**
* find the relevant hard scales for profile scales.
*/
void setupHardScales(const vector<ShowerProgenitorPtr> &,XCPtr);
/**
* Return the relevant hard scale to be used in the profile scales
*/
Energy hardScale() const {
return muPt;
}
/**
* Convert the HardTree into an extra shower emission
*/
void convertHardTree(bool hard,ShowerInteraction::Type type);
protected:
/**
* Start the shower of a timelike particle
*/
virtual bool startTimeLikeShower(ShowerInteraction::Type);
/**
* Update of the time-like stuff
*/
void updateHistory(tShowerParticlePtr particle);
/**
* Start the shower of a spacelike particle
*/
virtual bool startSpaceLikeShower(PPtr,ShowerInteraction::Type);
/**
* Start the shower of a spacelike particle
*/
virtual bool
startSpaceLikeDecayShower(const ShowerParticle::EvolutionScales & maxScales,
Energy minimumMass,ShowerInteraction::Type);
/**
* Select the branching for the next time-like emission
*/
Branching selectTimeLikeBranching(tShowerParticlePtr particle,
ShowerInteraction::Type type);
/**
* Create the timelike child of a branching
*/
ShowerParticleVector createTimeLikeChildren(tShowerParticlePtr particle,
IdList ids);
/**
* Vetos for the timelike shower
*/
virtual bool timeLikeVetoed(const Branching &,ShowerParticlePtr);
/**
* Vetos for the spacelike shower
*/
virtual bool spaceLikeVetoed(const Branching &,ShowerParticlePtr);
/**
* Vetos for the spacelike shower
*/
virtual bool spaceLikeDecayVetoed(const Branching &,ShowerParticlePtr);
/**
* Only generate the hard emission, for testing only.
*/
bool hardOnly() const {return _limitEmissions==3;}
/**
* Members to construct the HardTree from the shower if needed
*/
//@{
/**
* Construct the tree for a scattering process
*/
bool constructHardTree(vector<ShowerProgenitorPtr> & particlesToShower,
ShowerInteraction::Type inter);
/**
* Construct the tree for a decay process
*/
bool constructDecayTree(vector<ShowerProgenitorPtr> & particlesToShower,
ShowerInteraction::Type inter);
/**
* Construct a time-like line
*/
void constructTimeLikeLine(tHardBranchingPtr branch,tShowerParticlePtr particle);
/**
* Construct a space-like line
*/
void constructSpaceLikeLine(tShowerParticlePtr particle,
HardBranchingPtr & first, HardBranchingPtr & last,
SudakovPtr sud,PPtr beam);
//@}
public:
/** @name MC@NLO diagnostics */
//@{
/**
* True, if Matchbox MC@NLO S-event
*/
bool wasMCatNLOSEvent() const { return isMCatNLOSEvent; }
/**
* True, if matchbox MC@NLO H-event
*/
bool wasMCatNLOHEvent() const { return isMCatNLOHEvent; }
//@}
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.
*/
Evolver & operator=(const Evolver &);
private:
/**
* Pointer to the model for the shower evolution model
*/
ShowerModelPtr _model;
/**
* Pointer to the splitting generator
*/
SplittingGeneratorPtr _splittingGenerator;
/**
* Maximum number of tries to generate the shower of a particular tree
*/
unsigned int _maxtry;
/**
* Matrix element correction switch
*/
unsigned int _meCorrMode;
/**
* Hard emission veto switch
*/
unsigned int _hardVetoMode;
/**
* Hard veto to be read switch
*/
unsigned int _hardVetoRead;
/**
* Control of the reconstruction option
*/
unsigned int _reconOpt;
/**
* Option for inclusion of mass veto
*/
unsigned int _massVetoOption;
/**
* If hard veto pT scale is being read-in this determines
* whether the read-in value is applied to primary and
* secondary (MPI) scatters or just the primary one, with
* the usual computation of the veto being performed for
* the secondary (MPI) scatters.
*/
bool _hardVetoReadOption;
/**
* rms intrinsic pT of Gaussian distribution
*/
Energy _iptrms;
/**
* Proportion of inverse quadratic intrinsic pT distribution
*/
double _beta;
/**
* Parameter for inverse quadratic: 2*Beta*Gamma/(sqr(Gamma)+sqr(intrinsicpT))
*/
Energy _gamma;
/**
* Upper bound on intrinsic pT for inverse quadratic
*/
Energy _iptmax;
/**
* Limit the number of emissions for testing
*/
unsigned int _limitEmissions;
/**
* The progenitor of the current shower
*/
ShowerProgenitorPtr _progenitor;
/**
* Matrix element
*/
HwMEBasePtr _hardme;
/**
* Decayer
*/
HwDecayerBasePtr _decayme;
/**
* The ShowerTree currently being showered
*/
ShowerTreePtr _currenttree;
/**
* The HardTree currently being showered
*/
HardTreePtr _hardtree;
/**
* Radiation enhancement factors for use with the veto algorithm
* if needed by the soft matrix element correction
*/
//@{
/**
* Enhancement factor for initial-state radiation
*/
double _initialenhance;
/**
* Enhancement factor for final-state radiation
*/
double _finalenhance;
//@}
/**
* The beam particle data for the current initial-state shower
*/
Ptr<BeamParticleData>::const_pointer _beam;
/**
* Storage of the intrinsic \f$p_t\f$ of the particles
*/
map<tShowerProgenitorPtr,pair<Energy,double> > _intrinsic;
/**
* Vetoes
*/
vector<ShowerVetoPtr> _vetoes;
/**
+ * Full Shower Vetoes
+ */
+ vector<FullShowerVetoPtr> _fullShowerVetoes;
+
+ /**
+ * Number of iterations for reweighting
+ */
+ unsigned int _nReWeight;
+
+ /**
+ * Whether or not we are reweighting
+ */
+ bool _reWeight;
+
+ /**
* number of IS emissions
*/
unsigned int _nis;
/**
* Number of FS emissions
*/
unsigned int _nfs;
/**
* The option for wqhich interactions to use
*/
unsigned int interaction_;
/**
* Interactions allowed in the shower
*/
vector<ShowerInteraction::Type> interactions_;
/**
* Truncated shower switch
*/
bool _trunc_Mode;
/**
* Count of the number of truncated emissions
*/
unsigned int _truncEmissions;
/**
* Mode for the hard emissions
*/
int _hardEmissionMode;
/**
* Option to include spin correlations
*/
unsigned int _spinOpt;
/**
* Option for the kernal for soft correlations
*/
unsigned int _softOpt;
/**
* Option for hard radiation in POWHEG events
*/
bool _hardPOWHEG;
/**
* True, if Matchbox MC@NLO S-event
*/
bool isMCatNLOSEvent;
/**
* True, if matchbox MC@NLO H-event
*/
bool isMCatNLOHEvent;
/**
* True, if Matchbox Powheg S-event
*/
bool isPowhegSEvent;
/**
* True, if matchbox Powheg H-event
*/
bool isPowhegHEvent;
/**
* The shower approximation to provide the hard scale profile
*/
Ptr<ShowerApproximation>::tptr theShowerApproximation;
/**
* The factorization scale factor.
*/
double theFactorizationScaleFactor;
/**
* The renormalization scale factor.
*/
double theRenormalizationScaleFactor;
/**
* True if no warnings about incorrect hard emission
* mode setting have been issued yet
*/
static bool _hardEmissionModeWarn;
/**
* True if no warnings about missing truncated shower
* have been issued yet
*/
static bool _missingTruncWarn;
/**
* The relevant hard scale to be used in the profile scales
*/
Energy muPt;
/**
* Maximum number of emission attempts for FSR
*/
unsigned int _maxTryFSR;
/**
* Maximum number of failures for FSR generation
*/
unsigned int _maxFailFSR;
/**
* Failure fraction for FSR generation
*/
double _fracFSR;
/**
* Counter for number of FSR emissions
*/
unsigned int _nFSR;
/**
* Counter for the number of failed events due to FSR emissions
*/
unsigned int _nFailedFSR;
};
}
#endif /* HERWIG_Evolver_H */
diff --git a/Shower/Base/FullShowerVeto.cc b/Shower/Base/FullShowerVeto.cc
new file mode 100644
--- /dev/null
+++ b/Shower/Base/FullShowerVeto.cc
@@ -0,0 +1,158 @@
+// -*- C++ -*-
+//
+// This is the implementation of the non-inlined, non-templated member
+// functions of the FullShowerVeto class.
+//
+
+#include "FullShowerVeto.h"
+#include "ThePEG/Interface/ClassDocumentation.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 "Herwig/Shower/ShowerHandler.h"
+#include "ThePEG/Persistency/PersistentOStream.h"
+#include "ThePEG/Persistency/PersistentIStream.h"
+
+using namespace Herwig;
+
+void FullShowerVeto::persistentOutput(PersistentOStream & os) const {
+ os << type_ << behaviour_;
+}
+
+void FullShowerVeto::persistentInput(PersistentIStream & is, int) {
+ is >> type_ >> behaviour_;
+}
+
+void FullShowerVeto::doinit() {
+ Interfaced::doinit();
+ // check reweighting
+ if(behaviour_==1&&type_!=2)
+ throw Exception() << "Reweighting in the FullShowerVeto is only"
+ << " supported for the primary hard process\n"
+ << Exception::runerror;
+}
+
+DescribeAbstractClass<FullShowerVeto,Interfaced>
+describeHerwigFullShowerVeto("Herwig::FullShowerVeto", "HwShower.so");
+
+void FullShowerVeto::Init() {
+
+ static ClassDocumentation<FullShowerVeto> documentation
+ ("The FullShowerVeto class allows the parton shower generated from a configuration to be vetoed.");
+
+ static Switch<FullShowerVeto,unsigned int> interfaceType
+ ("Type",
+ "Which type of processes to consider",
+ &FullShowerVeto::type_, 1, false, false);
+ static SwitchOption interfaceTypeAll
+ (interfaceType,
+ "All",
+ "All Processes",
+ 0);
+ static SwitchOption interfaceTypeScattering
+ (interfaceType,
+ "Scattering",
+ "Only apply to scattering processes and not decays",
+ 1);
+ static SwitchOption interfaceTypePrimary
+ (interfaceType,
+ "Primary",
+ "Only apply to the primary scattering process",
+ 2);
+ static SwitchOption interfaceTypeDecay
+ (interfaceType,
+ "Decay",
+ "Only apply to decays",
+ 3);
+
+ static Switch<FullShowerVeto,unsigned int> interfaceBehaviour
+ ("Behaviour",
+ "What to do if the shower if vetoed",
+ &FullShowerVeto::behaviour_, 0, false, false);
+ static SwitchOption interfaceBehaviourShower
+ (interfaceBehaviour,
+ "Shower",
+ "Veto the shower and try showering the process again",
+ 0);
+ static SwitchOption interfaceBehaviourShowerReweight
+ (interfaceBehaviour,
+ "ShowerReweight",
+ "Veto the shower and reweight the event to take this into account, only supported for the primary process",
+ 1);
+ static SwitchOption interfaceBehaviourEvent
+ (interfaceBehaviour,
+ "Event",
+ "Veto the event, cross section automatically reweigted",
+ 2);
+
+}
+
+int FullShowerVeto::applyVeto(ShowerTreePtr tree) {
+ // return if veto should not be calculated
+ // decay process and only doing hard processes
+ // or vice versa
+ if(((type_ == 1 || type_ ==2 ) && tree->isDecay() ) ||
+ ( type_ == 3 && tree->isHard()))
+ return -1;
+ // not primary process and only doing those
+ if( type_ == 2 && !ShowerHandler::currentHandler()->firstInteraction() )
+ return -1;
+ // extract the incoming and outgoing particles from the ShowerTree
+ finalState_.clear();
+ incoming_.clear();
+ outgoing_.clear();
+ // incoming
+ for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator it=tree->incomingLines().begin();
+ it!=tree->incomingLines().end();++it) {
+ incoming_.push_back(it->first->progenitor());
+ }
+ // outgoing
+ for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator it=tree->outgoingLines().begin();
+ it!=tree->outgoingLines().end();++it) {
+ outgoing_.push_back(it->first->progenitor());
+ }
+ // call function in inheriting class to decide what to do
+ bool vetoed = vetoShower();
+ // clear storage
+ finalState_.clear();
+ incoming_.clear();
+ outgoing_.clear();
+ // return the answer
+ return vetoed ? behaviour_ : -1;
+}
+
+namespace {
+
+void addFinal(vector<tPPtr> & finalState, tPPtr particle) {
+ if(particle->children().empty()) {
+ finalState.push_back(particle);
+ return;
+ }
+ for(unsigned int ix=0;ix<particle->children().size();++ix) {
+ addFinal(finalState,particle->children()[ix]);
+ }
+}
+}
+
+
+// extract the incoming and outgoing particles
+const vector<tPPtr> & FullShowerVeto::finalState() {
+ if(!finalState_.empty()) return finalState_;
+ // incoming
+ for(unsigned int ix=0;ix<incoming_.size();++ix) {
+ if(incoming_[ix]->parents().empty()) continue;
+ tPPtr parent = incoming_[ix]->parents()[0];
+ while (parent) {
+ addFinal(finalState_,parent->children()[1]);
+ if(parent->parents().empty()) break;
+ parent = parent->parents()[0];
+ }
+ }
+ // outgoing
+ for(unsigned int ix=0;ix<outgoing_.size();++ix) {
+ addFinal(finalState_,outgoing_[ix]);
+ }
+ return finalState_;
+}
diff --git a/Shower/Base/FullShowerVeto.fh b/Shower/Base/FullShowerVeto.fh
new file mode 100644
--- /dev/null
+++ b/Shower/Base/FullShowerVeto.fh
@@ -0,0 +1,21 @@
+// -*- C++ -*-
+//
+// This is the forward declaration of the FullShowerVeto class.
+//
+#ifndef Herwig_FullShowerVeto_FH
+#define Herwig_FullShowerVeto_FH
+
+#include "ThePEG/Config/ThePEG.h"
+
+namespace Herwig {
+
+class FullShowerVeto;
+
+}
+namespace ThePEG {
+
+ThePEG_DECLARE_POINTERS(Herwig::FullShowerVeto,FullShowerVetoPtr);
+
+}
+
+#endif
diff --git a/Shower/Base/FullShowerVeto.h b/Shower/Base/FullShowerVeto.h
new file mode 100644
--- /dev/null
+++ b/Shower/Base/FullShowerVeto.h
@@ -0,0 +1,155 @@
+// -*- C++ -*-
+#ifndef Herwig_FullShowerVeto_H
+#define Herwig_FullShowerVeto_H
+//
+// This is the declaration of the FullShowerVeto class.
+//
+
+#include "ThePEG/Interface/Interfaced.h"
+#include "FullShowerVeto.fh"
+#include "ShowerTree.h"
+
+namespace Herwig {
+
+using namespace ThePEG;
+
+/**
+ * Here is the documentation of the FullShowerVeto class.
+ *
+ * @see \ref FullShowerVetoInterfaces "The interfaces"
+ * defined for FullShowerVeto.
+ */
+class FullShowerVeto: public Interfaced {
+
+public:
+
+ /**
+ * The default constructor.
+ */
+ FullShowerVeto() : type_(1), behaviour_(0) {}
+
+ /**
+ * Apply the veto
+ */
+ int applyVeto(ShowerTreePtr);
+
+ /**
+ * Which type of processes to consider
+ */
+ unsigned int type() const {return type_;}
+
+ /**
+ * What to do if the event is vetoed
+ */
+ unsigned int behaviour() const {return behaviour_;}
+
+protected:
+
+ /**
+ * Determine whether to not to veto the shower, to be implemented in inheriting classes
+ */
+ virtual bool vetoShower() = 0;
+
+ /**
+ * Incoming particles to the hard process
+ */
+ const vector<tPPtr> & incoming() {return incoming_;}
+
+ /**
+ * Outgoing particles from the hard process
+ */
+ const vector<tPPtr> & outgoing() {return outgoing_;}
+
+ /**
+ * The final-state particles at the end of the shower
+ */
+ const vector<tPPtr> & finalState();
+
+
+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 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.
+ */
+ FullShowerVeto & operator=(const FullShowerVeto &);
+
+private:
+
+ /**
+ * Switches
+ */
+ //@{
+ /**
+ * Which type of processes to consider
+ */
+ unsigned int type_;
+
+ /**
+ * What to do if the event is vetoed
+ */
+ unsigned int behaviour_;
+ //}
+
+ /**
+ * Temporary storage
+ */
+ //@{
+ /**
+ * Incoming to hard process
+ */
+ vector<tPPtr> incoming_;
+
+ /**
+ * Outgoing from the hard process
+ */
+ vector<tPPtr> outgoing_;
+
+ /**
+ * Final State particles
+ */
+ vector<tPPtr> finalState_;
+ //@}
+};
+
+}
+
+#endif /* Herwig_FullShowerVeto_H */
diff --git a/Shower/Default/QTildeSudakov.cc b/Shower/Default/QTildeSudakov.cc
--- a/Shower/Default/QTildeSudakov.cc
+++ b/Shower/Default/QTildeSudakov.cc
@@ -1,1118 +1,1118 @@
// -*- C++ -*-
//
// QTildeSudakov.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 QTildeSudakov class.
//
#include "QTildeSudakov.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/PDT/ParticleData.h"
#include "ThePEG/EventRecord/Event.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/Repository/CurrentGenerator.h"
#include "ThePEG/PDT/EnumParticles.h"
#include "Herwig/Shower/Default/FS_QTildeShowerKinematics1to2.h"
#include "Herwig/Shower/Default/IS_QTildeShowerKinematics1to2.h"
#include "Herwig/Shower/Default/Decay_QTildeShowerKinematics1to2.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "Herwig/Shower/Base/ShowerVertex.h"
#include "Herwig/Shower/Base/ShowerParticle.h"
#include "Herwig/Shower/ShowerHandler.h"
#include "Herwig/Shower/Base/Evolver.h"
#include "Herwig/Shower/Base/PartnerFinder.h"
#include "Herwig/Shower/Base/ShowerModel.h"
#include "Herwig/Shower/Base/KinematicsReconstructor.h"
using namespace Herwig;
DescribeNoPIOClass<QTildeSudakov,Herwig::SudakovFormFactor>
describeQTildeSudakov ("Herwig::QTildeSudakov","HwShower.so");
void QTildeSudakov::Init() {
static ClassDocumentation<QTildeSudakov> documentation
("The QTildeSudakov class implements the Sudakov form factor for ordering it"
" qtilde");
}
bool QTildeSudakov::guessTimeLike(Energy2 &t,Energy2 tmin,double enhance,
const double & detune) {
Energy2 told = t;
// calculate limits on z and if lower>upper return
if(!computeTimeLikeLimits(t)) return false;
// guess values of t and z
t = guesst(told,0,ids_,enhance,ids_[1]==ids_[2],detune);
z(guessz(0,ids_));
// actual values for z-limits
if(!computeTimeLikeLimits(t)) return false;
if(t<tmin) {
t=-1.0*GeV2;
return false;
}
else
return true;
}
bool QTildeSudakov::guessSpaceLike(Energy2 &t, Energy2 tmin, const double x,
double enhance,
const double & detune) {
Energy2 told = t;
// calculate limits on z if lower>upper return
if(!computeSpaceLikeLimits(t,x)) return false;
// guess values of t and z
t = guesst(told,1,ids_,enhance,ids_[1]==ids_[2],detune);
z(guessz(1,ids_));
// actual values for z-limits
if(!computeSpaceLikeLimits(t,x)) return false;
if(t<tmin) {
t=-1.0*GeV2;
return false;
}
else
return true;
}
bool QTildeSudakov::PSVeto(const Energy2 t) {
// still inside PS, return true if outside
// check vs overestimated limits
if(z() < zLimits().first || z() > zLimits().second) return true;
// compute the pts
Energy2 pt2=sqr(z()*(1.-z()))*t-masssquared_[1]*(1.-z())-masssquared_[2]*z();
if(ids_[0]!=ParticleID::g) pt2+=z()*(1.-z())*masssquared_[0];
// if pt2<0 veto
if(pt2<pT2min()) return true;
// otherwise calculate pt and return
pT(sqrt(pt2));
return false;
}
ShoKinPtr QTildeSudakov::generateNextTimeBranching(const Energy startingScale,
const IdList &ids,const bool cc,
double enhance,
double detuning) {
// First reset the internal kinematics variables that can
// have been eventually set in the previous call to the method.
q_ = ZERO;
z(0.);
phi(0.);
// perform initialization
Energy2 tmax(sqr(startingScale)),tmin;
initialize(ids,tmin,cc);
// check max > min
if(tmax<=tmin) return ShoKinPtr();
// calculate next value of t using veto algorithm
Energy2 t(tmax);
bool calcVariations=!ShowerHandler::currentHandler()->showerVariations().empty();
if(!calcVariations){
// Without variations do the usual Veto algorithm
// No need for more if-statements in this loop.
do {
if(!guessTimeLike(t,tmin,enhance,detuning)) break;
}
while(PSVeto(t) ||
SplittingFnVeto(z()*(1.-z())*t,ids,true,detuning) ||
alphaSVeto(splittingFn()->angularOrdered() ? sqr(z()*(1.-z()))*t : z()*(1.-z())*t));
}else{
bool alphaRew(true),PSRew(true),SplitRew(true);
do {
if(!guessTimeLike(t,tmin,enhance,detuning)) break;
PSRew=PSVeto(t);
if (PSRew) continue;
SplitRew=SplittingFnVeto(z()*(1.-z())*t,ids,true,detuning);
alphaRew=alphaSVeto(splittingFn()->angularOrdered() ? sqr(z()*(1.-z()))*t : z()*(1.-z())*t);
double factor=alphaSVetoRatio(splittingFn()->angularOrdered() ? sqr(z()*(1.-z()))*t : z()*(1.-z())*t,1.)*
SplittingFnVetoRatio(z()*(1.-z())*t,ids,true,detuning);
ShowerHandlerPtr ch = ShowerHandler::currentHandler();
if( !(SplitRew || alphaRew) ) {
//Emission
q_ = t > ZERO ? Energy(sqrt(t)) : -1.*MeV;
if (q_ <= ZERO) break;
}
for ( map<string,ShowerHandler::ShowerVariation>::const_iterator var =
ch->showerVariations().begin();
var != ch->showerVariations().end(); ++var ) {
if ( ( ch->firstInteraction() && var->second.firstInteraction ) ||
( !ch->firstInteraction() && var->second.secondaryInteractions ) ) {
double newfactor = alphaSVetoRatio(splittingFn()->angularOrdered() ?
sqr(z()*(1.-z()))*t :
z()*(1.-z())*t,var->second.renormalizationScaleFactor)
* SplittingFnVetoRatio(z()*(1.-z())*t,ids,true,detuning);
double varied;
if ( SplitRew || alphaRew ) {
// No Emission
varied = (1. - newfactor) / (1. - factor);
} else {
// Emission
varied = newfactor / factor;
}
map<string,double>::iterator wi = ch->currentWeights().find(var->first);
if ( wi != ch->currentWeights().end() )
wi->second *= varied;
else {
assert(false);
//ch->currentWeights()[var->first] = varied;
}
}
}
}
while(PSRew || SplitRew || alphaRew);
}
q_ = t > ZERO ? Energy(sqrt(t)) : -1.*MeV;
if(q_ < ZERO) return ShoKinPtr();
// return the ShowerKinematics object
return createFinalStateBranching(q_,z(),phi(),pT());
}
ShoKinPtr QTildeSudakov::
generateNextSpaceBranching(const Energy startingQ,
const IdList &ids,
double x,bool cc,
double enhance,
Ptr<BeamParticleData>::transient_const_pointer beam,
double detuning) {
// First reset the internal kinematics variables that can
// have been eventually set in the previous call to the method.
q_ = ZERO;
z(0.);
phi(0.);
// perform the initialization
Energy2 tmax(sqr(startingQ)),tmin;
initialize(ids,tmin,cc);
// check max > min
if(tmax<=tmin) return ShoKinPtr();
// extract the partons which are needed for the PDF veto
// Different order, incoming parton is id = 1, outgoing are id=0,2
tcPDPtr parton0 = getParticleData(ids[0]);
tcPDPtr parton1 = getParticleData(ids[1]);
if(cc) {
if(parton0->CC()) parton0 = parton0->CC();
if(parton1->CC()) parton1 = parton1->CC();
}
// calculate next value of t using veto algorithm
Energy2 t(tmax),pt2(ZERO);
bool calcVariations=!ShowerHandler::currentHandler()->showerVariations().empty();
if(!calcVariations){
// Without variations do the usual Veto algorithm
// No need for more if-statements in this loop.
do {
if(!guessSpaceLike(t,tmin,x,enhance,detuning)) break;
pt2=sqr(1.-z())*t-z()*masssquared_[2];
}
while(pt2 < pT2min()||
z() > zLimits().second||
- SplittingFnVeto((1.-z())*t/z(),ids,true,detuning)||
+ SplittingFnVeto((1.-z())*t/z(),ids,false,detuning)||
alphaSVeto(splittingFn()->angularOrdered() ? sqr(1.-z())*t : (1.-z())*t)||
PDFVeto(t,x,parton0,parton1,beam));
}else{
bool alphaRew(true),PDFRew(true),ptRew(true),zRew(true),SplitRew(true);
do {
if(!guessSpaceLike(t,tmin,x,enhance,detuning)) break;
pt2=sqr(1.-z())*t-z()*masssquared_[2];
ptRew=pt2 < pT2min();
zRew=z() > zLimits().second;
if (ptRew||zRew) continue;
- SplitRew=SplittingFnVeto((1.-z())*t/z(),ids,true,detuning);
+ SplitRew=SplittingFnVeto((1.-z())*t/z(),ids,false,detuning);
alphaRew=alphaSVeto(splittingFn()->angularOrdered() ? sqr(1.-z())*t : (1.-z())*t);
PDFRew=PDFVeto(t,x,parton0,parton1,beam);
double factor=PDFVetoRatio(t,x,parton0,parton1,beam,1.)*
alphaSVetoRatio(splittingFn()->angularOrdered() ? sqr(1.-z())*t : (1.-z())*t,1.)*
- SplittingFnVetoRatio((1.-z())*t/z(),ids,true,detuning);
+ SplittingFnVetoRatio((1.-z())*t/z(),ids,false,detuning);
ShowerHandlerPtr ch = ShowerHandler::currentHandler();
if( !(PDFRew || SplitRew || alphaRew) ) {
//Emission
q_ = t > ZERO ? Energy(sqrt(t)) : -1.*MeV;
if (q_ <= ZERO) break;
}
for ( map<string,ShowerHandler::ShowerVariation>::const_iterator var =
ch->showerVariations().begin();
var != ch->showerVariations().end(); ++var ) {
if ( ( ch->firstInteraction() && var->second.firstInteraction ) ||
( !ch->firstInteraction() && var->second.secondaryInteractions ) ) {
double newfactor = PDFVetoRatio(t,x,parton0,parton1,beam,var->second.factorizationScaleFactor)*
alphaSVetoRatio(splittingFn()->angularOrdered() ?
sqr(1.-z())*t : (1.-z())*t,var->second.renormalizationScaleFactor)
- *SplittingFnVetoRatio((1.-z())*t/z(),ids,true,detuning);
+ *SplittingFnVetoRatio((1.-z())*t/z(),ids,false,detuning);
double varied;
if( PDFRew || SplitRew || alphaRew) {
// No Emission
varied = (1. - newfactor) / (1. - factor);
} else {
// Emission
varied = newfactor / factor;
}
map<string,double>::iterator wi = ch->currentWeights().find(var->first);
if ( wi != ch->currentWeights().end() )
wi->second *= varied;
else {
assert(false);
//ch->currentWeights()[var->first] = varied;
}
}
}
}
while( PDFRew || SplitRew || alphaRew);
}
if(t > ZERO && zLimits().first < zLimits().second) q_ = sqrt(t);
else return ShoKinPtr();
pT(sqrt(pt2));
// create the ShowerKinematics and return it
return createInitialStateBranching(q_,z(),phi(),pT());
}
void QTildeSudakov::initialize(const IdList & ids, Energy2 & tmin,const bool cc) {
ids_=ids;
if(cc) {
for(unsigned int ix=0;ix<ids.size();++ix) {
if(getParticleData(ids[ix])->CC()) ids_[ix]*=-1;
}
}
tmin = cutOffOption() != 2 ? ZERO : 4.*pT2min();
masses_ = virtualMasses(ids);
masssquared_.clear();
for(unsigned int ix=0;ix<masses_.size();++ix) {
masssquared_.push_back(sqr(masses_[ix]));
if(ix>0) tmin=max(masssquared_[ix],tmin);
}
}
ShoKinPtr QTildeSudakov::generateNextDecayBranching(const Energy startingScale,
const Energy stoppingScale,
const Energy minmass,
const IdList &ids,
const bool cc,
double enhance,
double detuning) {
// First reset the internal kinematics variables that can
// have been eventually set in the previous call to this method.
q_ = Constants::MaxEnergy;
z(0.);
phi(0.);
// perform initialisation
Energy2 tmax(sqr(stoppingScale)),tmin;
initialize(ids,tmin,cc);
tmin=sqr(startingScale);
// check some branching possible
if(tmax<=tmin) return ShoKinPtr();
// perform the evolution
Energy2 t(tmin),pt2(-MeV2);
do {
if(!guessDecay(t,tmax,minmass,enhance,detuning)) break;
pt2 = sqr(1.-z())*(t-masssquared_[0])-z()*masssquared_[2];
}
while(SplittingFnVeto((1.-z())*t/z(),ids,true,detuning)||
alphaSVeto(splittingFn()->angularOrdered() ? sqr(1.-z())*t : (1.-z())*t ) ||
pt2<pT2min() ||
t*(1.-z())>masssquared_[0]-sqr(minmass));
if(t > ZERO) {
q_ = sqrt(t);
pT(sqrt(pt2));
}
else return ShoKinPtr();
phi(0.);
// create the ShowerKinematics object
return createDecayBranching(q_,z(),phi(),pT());
}
bool QTildeSudakov::guessDecay(Energy2 &t,Energy2 tmax, Energy minmass,
double enhance, const double & detune) {
// previous scale
Energy2 told = t;
// overestimated limits on z
if(tmax<masssquared_[0]) {
t=-1.0*GeV2;
return false;
}
Energy2 tm2 = tmax-masssquared_[0];
Energy tm = sqrt(tm2);
pair<double,double> limits=make_pair(sqr(minmass/masses_[0]),
1.-sqrt(masssquared_[2]+pT2min()+
0.25*sqr(masssquared_[2])/tm2)/tm
+0.5*masssquared_[2]/tm2);
zLimits(limits);
if(zLimits().second<zLimits().first) {
t=-1.0*GeV2;
return false;
}
// guess values of t and z
t = guesst(told,2,ids_,enhance,ids_[1]==ids_[2],detune);
z(guessz(2,ids_));
// actual values for z-limits
if(t<masssquared_[0]) {
t=-1.0*GeV2;
return false;
}
tm2 = t-masssquared_[0];
tm = sqrt(tm2);
limits=make_pair(sqr(minmass/masses_[0]),
1.-sqrt(masssquared_[2]+pT2min()+
0.25*sqr(masssquared_[2])/tm2)/tm
+0.5*masssquared_[2]/tm2);
zLimits(limits);
if(t>tmax||zLimits().second<zLimits().first) {
t=-1.0*GeV2;
return false;
}
else
return true;
}
bool QTildeSudakov::computeTimeLikeLimits(Energy2 & t) {
if (t < 1e-20 * GeV2) {
t=-1.*GeV2;
return false;
}
// special case for gluon radiating
pair<double,double> limits;
if(ids_[0]==ParticleID::g||ids_[0]==ParticleID::gamma) {
// no emission possible
if(t<16.*(masssquared_[1]+pT2min())) {
t=-1.*GeV2;
return false;
}
// overestimate of the limits
limits.first = 0.5*(1.-sqrt(1.-4.*sqrt((masssquared_[1]+pT2min())/t)));
limits.second = 1.-limits.first;
}
// special case for radiated particle is gluon
else if(ids_[2]==ParticleID::g||ids_[2]==ParticleID::gamma) {
limits.first = sqrt((masssquared_[1]+pT2min())/t);
limits.second = 1.-sqrt((masssquared_[2]+pT2min())/t);
}
else if(ids_[1]==ParticleID::g||ids_[1]==ParticleID::gamma) {
limits.second = sqrt((masssquared_[2]+pT2min())/t);
limits.first = 1.-sqrt((masssquared_[1]+pT2min())/t);
}
else {
limits.first = (masssquared_[1]+pT2min())/t;
limits.second = 1.-(masssquared_[2]+pT2min())/t;
}
if(limits.first>=limits.second) {
t=-1.*GeV2;
return false;
}
zLimits(limits);
return true;
}
bool QTildeSudakov::computeSpaceLikeLimits(Energy2 & t, double x) {
if (t < 1e-20 * GeV2) {
t=-1.*GeV2;
return false;
}
pair<double,double> limits;
// compute the limits
limits.first = x;
double yy = 1.+0.5*masssquared_[2]/t;
limits.second = yy - sqrt(sqr(yy)-1.+pT2min()/t);
// return false if lower>upper
zLimits(limits);
if(limits.second<limits.first) {
t=-1.*GeV2;
return false;
}
else
return true;
}
namespace {
tShowerParticlePtr findCorrelationPartner(ShowerParticle & particle,
bool forward,
ShowerInteraction::Type inter) {
tPPtr child = &particle;
tShowerParticlePtr mother;
if(forward) {
mother = !particle.parents().empty() ?
dynamic_ptr_cast<tShowerParticlePtr>(particle.parents()[0]) : tShowerParticlePtr();
}
else {
mother = particle.children().size()==2 ?
dynamic_ptr_cast<tShowerParticlePtr>(&particle) : tShowerParticlePtr();
}
tShowerParticlePtr partner;
while(mother) {
tPPtr otherChild;
if(forward) {
for (unsigned int ix=0;ix<mother->children().size();++ix) {
if(mother->children()[ix]!=child) {
otherChild = mother->children()[ix];
break;
}
}
}
else {
otherChild = mother->children()[1];
}
tShowerParticlePtr other = dynamic_ptr_cast<tShowerParticlePtr>(otherChild);
if((inter==ShowerInteraction::QCD && otherChild->dataPtr()->coloured()) ||
(inter==ShowerInteraction::QED && otherChild->dataPtr()->charged())) {
partner = other;
break;
}
if(forward && !other->isFinalState()) {
partner = dynamic_ptr_cast<tShowerParticlePtr>(mother);
break;
}
child = mother;
if(forward) {
mother = ! mother->parents().empty() ?
dynamic_ptr_cast<tShowerParticlePtr>(mother->parents()[0]) : tShowerParticlePtr();
}
else {
if(mother->children()[0]->children().size()!=2)
break;
tShowerParticlePtr mtemp =
dynamic_ptr_cast<tShowerParticlePtr>(mother->children()[0]);
if(!mtemp)
break;
else
mother=mtemp;
}
}
if(!partner) {
if(forward) {
partner = dynamic_ptr_cast<tShowerParticlePtr>( child)->partner();
}
else {
if(mother) {
tShowerParticlePtr parent;
if(!mother->children().empty()) {
parent = dynamic_ptr_cast<tShowerParticlePtr>(mother->children()[0]);
}
if(!parent) {
parent = dynamic_ptr_cast<tShowerParticlePtr>(mother);
}
partner = parent->partner();
}
else {
partner = dynamic_ptr_cast<tShowerParticlePtr>(&particle)->partner();
}
}
}
return partner;
}
pair<double,double> softPhiMin(double phi0, double phi1, double A, double B, double C, double D) {
double c01 = cos(phi0 - phi1);
double s01 = sin(phi0 - phi1);
double s012(sqr(s01)), c012(sqr(c01));
double A2(A*A), B2(B*B), C2(C*C), D2(D*D);
if(abs(B/A)<1e-10 && abs(D/C)<1e-10) return make_pair(phi0,phi0+Constants::pi);
double root = sqr(B2)*C2*D2*sqr(s012) + 2.*A*B2*B*C2*C*D*c01*s012 + 2.*A*B2*B*C*D2*D*c01*s012
+ 4.*A2*B2*C2*D2*c012 - A2*B2*C2*D2*s012 - A2*B2*sqr(D2)*s012 - sqr(B2)*sqr(C2)*s012
- sqr(B2)*C2*D2*s012 - 4.*A2*A*B*C*D2*D*c01 - 4.*A*B2*B*C2*C*D*c01 + sqr(A2)*sqr(D2)
+ 2.*A2*B2*C2*D2 + sqr(B2)*sqr(C2);
if(root<0.) return make_pair(phi0,phi0+Constants::pi);
root = sqrt(root);
double denom = (-2.*A*B*C*D*c01 + A2*D2 + B2*C2);
double denom2 = (-B*C*c01 + A*D);
double num = B2*C*D*s012;
return make_pair(atan2(B*s01*(-C*(num + root) / denom + D) / denom2, -(num + root ) / denom) + phi0,
atan2(B*s01*(-C*(num - root) / denom + D) / denom2, -(num - root ) / denom) + phi0);
}
}
double QTildeSudakov::generatePhiForward(ShowerParticle & particle,
const IdList & ids,
ShoKinPtr kinematics) {
// no correlations, return flat phi
if(! ShowerHandler::currentHandler()->evolver()->correlations())
return Constants::twopi*UseRandom::rnd();
// get the kinematic variables
double z = kinematics->z();
Energy2 t = z*(1.-z)*sqr(kinematics->scale());
Energy pT = kinematics->pT();
// if soft correlations
Energy2 pipj,pik;
bool canBeSoft[2] = {ids[1]==ParticleID::g || ids[1]==ParticleID::gamma,
ids[2]==ParticleID::g || ids[2]==ParticleID::gamma };
vector<Energy2> pjk(3,ZERO);
vector<Energy> Ek(3,ZERO);
Energy Ei,Ej;
Energy2 m12(ZERO),m22(ZERO);
InvEnergy2 aziMax(ZERO);
bool softAllowed = ShowerHandler::currentHandler()->evolver()->softCorrelations()&&
(canBeSoft[0] || canBeSoft[1]);
if(softAllowed) {
// find the partner for the soft correlations
tShowerParticlePtr partner=findCorrelationPartner(particle,true,splittingFn()->interactionType());
// remember we want the softer gluon
bool swapOrder = !canBeSoft[1] || (canBeSoft[0] && canBeSoft[1] && z < 0.5);
double zFact = !swapOrder ? (1.-z) : z;
// compute the transforms to the shower reference frame
// first the boost
vector<Lorentz5Momentum> basis = kinematics->getBasis();
Lorentz5Momentum pVect = basis[0], nVect = basis[1];
Boost beta_bb;
if(kinematics->frame()==ShowerKinematics::BackToBack) {
beta_bb = -(pVect + nVect).boostVector();
}
else if(kinematics->frame()==ShowerKinematics::Rest) {
beta_bb = -pVect.boostVector();
}
else
assert(false);
pVect.boost(beta_bb);
nVect.boost(beta_bb);
Axis axis;
if(kinematics->frame()==ShowerKinematics::BackToBack) {
axis = pVect.vect().unit();
}
else if(kinematics->frame()==ShowerKinematics::Rest) {
axis = nVect.vect().unit();
}
else
assert(false);
// and then the rotation
LorentzRotation rot;
if(axis.perp2()>0.) {
double sinth(sqrt(sqr(axis.x())+sqr(axis.y())));
rot.rotate(acos(axis.z()),Axis(-axis.y()/sinth,axis.x()/sinth,0.));
}
else if(axis.z()<0.) {
rot.rotate(Constants::pi,Axis(1.,0.,0.));
}
rot.invert();
pVect *= rot;
nVect *= rot;
// shower parameters
Energy2 pn = pVect*nVect, m2 = pVect.m2();
double alpha0 = particle.showerParameters().alpha;
double beta0 = 0.5/alpha0/pn*
(sqr(particle.dataPtr()->mass())-sqr(alpha0)*m2+sqr(particle.showerParameters().pt));
Lorentz5Momentum qperp0(particle.showerParameters().ptx,
particle.showerParameters().pty,ZERO,ZERO);
assert(partner);
Lorentz5Momentum pj = partner->momentum();
pj.boost(beta_bb);
pj *= rot;
// compute the two phi independent dot products
pik = 0.5*zFact*(sqr(alpha0)*m2 - sqr(particle.showerParameters().pt) + 2.*alpha0*beta0*pn )
+0.5*sqr(pT)/zFact;
Energy2 dot1 = pj*pVect;
Energy2 dot2 = pj*nVect;
Energy2 dot3 = pj*qperp0;
pipj = alpha0*dot1+beta0*dot2+dot3;
// compute the constants for the phi dependent dot product
pjk[0] = zFact*(alpha0*dot1+dot3-0.5*dot2/pn*(alpha0*m2-sqr(particle.showerParameters().pt)/alpha0))
+0.5*sqr(pT)*dot2/pn/zFact/alpha0;
pjk[1] = (pj.x() - dot2/alpha0/pn*qperp0.x())*pT;
pjk[2] = (pj.y() - dot2/alpha0/pn*qperp0.y())*pT;
m12 = sqr(particle.dataPtr()->mass());
m22 = sqr(partner->dataPtr()->mass());
if(swapOrder) {
pjk[1] *= -1.;
pjk[2] *= -1.;
}
Ek[0] = zFact*(alpha0*pVect.t()-0.5*nVect.t()/pn*(alpha0*m2-sqr(particle.showerParameters().pt)/alpha0))
+0.5*sqr(pT)*nVect.t()/pn/zFact/alpha0;
Ek[1] = -nVect.t()/alpha0/pn*qperp0.x()*pT;
Ek[2] = -nVect.t()/alpha0/pn*qperp0.y()*pT;
if(swapOrder) {
Ek[1] *= -1.;
Ek[2] *= -1.;
}
Energy mag2=sqrt(sqr(Ek[1])+sqr(Ek[2]));
Ei = alpha0*pVect.t()+beta0*nVect.t();
Ej = pj.t();
double phi0 = atan2(-pjk[2],-pjk[1]);
if(phi0<0.) phi0 += Constants::twopi;
double phi1 = atan2(-Ek[2],-Ek[1]);
if(phi1<0.) phi1 += Constants::twopi;
double xi_min = pik/Ei/(Ek[0]+mag2), xi_max = pik/Ei/(Ek[0]-mag2), xi_ij = pipj/Ei/Ej;
if(xi_min>xi_max) swap(xi_min,xi_max);
if(xi_min>xi_ij) softAllowed = false;
Energy2 mag = sqrt(sqr(pjk[1])+sqr(pjk[2]));
if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==1) {
aziMax = -m12/sqr(pik) -m22/sqr(pjk[0]+mag) +2.*pipj/pik/(pjk[0]-mag);
}
else if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==2) {
double A = (pipj*Ek[0]- Ej*pik)/Ej/sqr(Ej);
double B = -sqrt(sqr(pipj)*(sqr(Ek[1])+sqr(Ek[2])))/Ej/sqr(Ej);
double C = pjk[0]/sqr(Ej);
double D = -sqrt(sqr(pjk[1])+sqr(pjk[2]))/sqr(Ej);
pair<double,double> minima = softPhiMin(phi0,phi1,A,B,C,D);
aziMax = 0.5/pik/(Ek[0]-mag2)*(Ei-m12*(Ek[0]-mag2)/pik + max(Ej*(A+B*cos(minima.first -phi1))/(C+D*cos(minima.first -phi0)),
Ej*(A+B*cos(minima.second-phi1))/(C+D*cos(minima.second-phi0))));
}
else
assert(false);
}
// if spin correlations
vector<pair<int,Complex> > wgts;
if(ShowerHandler::currentHandler()->evolver()->spinCorrelations()) {
// get the spin density matrix and the mapping
RhoDMatrix mapping;
SpinPtr inspin;
bool needMapping = getMapping(inspin,mapping,particle,kinematics);
// set the decayed flag
inspin->decay();
// get the spin density matrix
RhoDMatrix rho=inspin->rhoMatrix();
// map to the shower basis if needed
if(needMapping) {
RhoDMatrix rhop(rho.iSpin(),false);
for(int ixa=0;ixa<rho.iSpin();++ixa) {
for(int ixb=0;ixb<rho.iSpin();++ixb) {
for(int iya=0;iya<rho.iSpin();++iya) {
for(int iyb=0;iyb<rho.iSpin();++iyb) {
rhop(ixa,ixb) += rho(iya,iyb)*mapping(iya,ixa)*conj(mapping(iyb,ixb));
}
}
}
}
rhop.normalize();
rho = rhop;
}
// calculate the weights
wgts = splittingFn()->generatePhiForward(z,t,ids,rho);
}
else {
wgts = vector<pair<int,Complex> >(1,make_pair(0,1.));
}
// generate the azimuthal angle
double phi,wgt;
static const Complex ii(0.,1.);
unsigned int ntry(0);
double phiMax(0.),wgtMax(0.);
do {
phi = Constants::twopi*UseRandom::rnd();
// first the spin correlations bit (gives 1 if correlations off)
Complex spinWgt = 0.;
for(unsigned int ix=0;ix<wgts.size();++ix) {
if(wgts[ix].first==0)
spinWgt += wgts[ix].second;
else
spinWgt += exp(double(wgts[ix].first)*ii*phi)*wgts[ix].second;
}
wgt = spinWgt.real();
if(wgt-1.>1e-10) {
generator()->log() << "Forward spin weight problem " << wgt << " " << wgt-1.
<< " " << ids[0] << " " << ids[1] << " " << ids[2] << " " << " " << phi << "\n";
generator()->log() << "Weights \n";
for(unsigned int ix=0;ix<wgts.size();++ix)
generator()->log() << wgts[ix].first << " " << wgts[ix].second << "\n";
}
// soft correlations bit
double aziWgt = 1.;
if(softAllowed) {
Energy2 dot = pjk[0]+pjk[1]*cos(phi)+pjk[2]*sin(phi);
Energy Eg = Ek[0]+Ek[1]*cos(phi)+Ek[2]*sin(phi);
if(pipj*Eg>pik*Ej) {
if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==1) {
aziWgt = (-m12/sqr(pik) -m22/sqr(dot) +2.*pipj/pik/dot)/aziMax;
}
else if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==2) {
aziWgt = max(ZERO,0.5/pik/Eg*(Ei-m12*Eg/pik + (pipj*Eg - Ej*pik)/dot)/aziMax);
}
if(aziWgt-1.>1e-10||aziWgt<-1e-10) {
generator()->log() << "Forward soft weight problem " << aziWgt << " " << aziWgt-1.
<< " " << ids[0] << " " << ids[1] << " " << ids[2] << " " << " " << phi << "\n";
}
}
else {
aziWgt = 0.;
}
}
wgt *= aziWgt;
if(wgt>wgtMax) {
phiMax = phi;
wgtMax = wgt;
}
++ntry;
}
while(wgt<UseRandom::rnd()&&ntry<10000);
if(ntry==10000) {
generator()->log() << "Too many tries to generate phi in forward evolution\n";
phi = phiMax;
}
// return the azimuthal angle
return phi;
}
double QTildeSudakov::generatePhiBackward(ShowerParticle & particle,
const IdList & ids,
ShoKinPtr kinematics) {
// no correlations, return flat phi
if(! ShowerHandler::currentHandler()->evolver()->correlations())
return Constants::twopi*UseRandom::rnd();
// get the kinematic variables
double z = kinematics->z();
Energy2 t = (1.-z)*sqr(kinematics->scale())/z;
Energy pT = kinematics->pT();
// if soft correlations
bool softAllowed = ShowerHandler::currentHandler()->evolver()->softCorrelations() &&
(ids[2]==ParticleID::g || ids[2]==ParticleID::gamma);
Energy2 pipj,pik,m12(ZERO),m22(ZERO);
vector<Energy2> pjk(3,ZERO);
Energy Ei,Ej,Ek;
InvEnergy2 aziMax(ZERO);
if(softAllowed) {
// find the partner for the soft correlations
tShowerParticlePtr partner=findCorrelationPartner(particle,false,splittingFn()->interactionType());
double zFact = (1.-z);
// compute the transforms to the shower reference frame
// first the boost
vector<Lorentz5Momentum> basis = kinematics->getBasis();
Lorentz5Momentum pVect = basis[0];
Lorentz5Momentum nVect = basis[1];
assert(kinematics->frame()==ShowerKinematics::BackToBack);
Boost beta_bb = -(pVect + nVect).boostVector();
pVect.boost(beta_bb);
nVect.boost(beta_bb);
Axis axis = pVect.vect().unit();
// and then the rotation
LorentzRotation rot;
if(axis.perp2()>0.) {
double sinth(sqrt(sqr(axis.x())+sqr(axis.y())));
rot.rotate(acos(axis.z()),Axis(-axis.y()/sinth,axis.x()/sinth,0.));
}
else if(axis.z()<0.) {
rot.rotate(Constants::pi,Axis(1.,0.,0.));
}
rot.invert();
pVect *= rot;
nVect *= rot;
// shower parameters
Energy2 pn = pVect*nVect;
Energy2 m2 = pVect.m2();
double alpha0 = particle.x();
double beta0 = -0.5/alpha0/pn*sqr(alpha0)*m2;
Lorentz5Momentum pj = partner->momentum();
pj.boost(beta_bb);
pj *= rot;
double beta2 = 0.5*(1.-zFact)*(sqr(alpha0*zFact/(1.-zFact))*m2+sqr(pT))/alpha0/zFact/pn;
// compute the two phi independent dot products
Energy2 dot1 = pj*pVect;
Energy2 dot2 = pj*nVect;
pipj = alpha0*dot1+beta0*dot2;
pik = alpha0*(alpha0*zFact/(1.-zFact)*m2+pn*(beta2+zFact/(1.-zFact)*beta0));
// compute the constants for the phi dependent dot product
pjk[0] = alpha0*zFact/(1.-zFact)*dot1+beta2*dot2;
pjk[1] = pj.x()*pT;
pjk[2] = pj.y()*pT;
m12 = ZERO;
m22 = sqr(partner->dataPtr()->mass());
Energy2 mag = sqrt(sqr(pjk[1])+sqr(pjk[2]));
if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==1) {
aziMax = -m12/sqr(pik) -m22/sqr(pjk[0]+mag) +2.*pipj/pik/(pjk[0]-mag);
}
else if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==2) {
Ek = alpha0*zFact/(1.-zFact)*pVect.t()+beta2*nVect.t();
Ei = alpha0*pVect.t()+beta0*nVect.t();
Ej = pj.t();
if(pipj*Ek> Ej*pik) {
aziMax = 0.5/pik/Ek*(Ei-m12*Ek/pik + (pipj*Ek- Ej*pik)/(pjk[0]-mag));
}
else {
aziMax = 0.5/pik/Ek*(Ei-m12*Ek/pik);
}
}
else {
assert(ShowerHandler::currentHandler()->evolver()->softCorrelations()==0);
}
}
// if spin correlations
vector<pair<int,Complex> > wgts;
if(ShowerHandler::currentHandler()->evolver()->spinCorrelations()) {
// get the spin density matrix and the mapping
RhoDMatrix mapping;
SpinPtr inspin;
bool needMapping = getMapping(inspin,mapping,particle,kinematics);
// set the decayed flag (counterintuitive but going backward)
inspin->decay();
// get the spin density matrix
RhoDMatrix rho=inspin->DMatrix();
// map to the shower basis if needed
if(needMapping) {
RhoDMatrix rhop(rho.iSpin(),false);
for(int ixa=0;ixa<rho.iSpin();++ixa) {
for(int ixb=0;ixb<rho.iSpin();++ixb) {
for(int iya=0;iya<rho.iSpin();++iya) {
for(int iyb=0;iyb<rho.iSpin();++iyb) {
rhop(ixa,ixb) += rho(iya,iyb)*mapping(iya,ixa)*conj(mapping(iyb,ixb));
}
}
}
}
rhop.normalize();
rho = rhop;
}
wgts = splittingFn()->generatePhiBackward(z,t,ids,rho);
}
else {
wgts = vector<pair<int,Complex> >(1,make_pair(0,1.));
}
// generate the azimuthal angle
double phi,wgt;
static const Complex ii(0.,1.);
unsigned int ntry(0);
double phiMax(0.),wgtMax(0.);
do {
phi = Constants::twopi*UseRandom::rnd();
Complex spinWgt = 0.;
for(unsigned int ix=0;ix<wgts.size();++ix) {
if(wgts[ix].first==0)
spinWgt += wgts[ix].second;
else
spinWgt += exp(double(wgts[ix].first)*ii*phi)*wgts[ix].second;
}
wgt = spinWgt.real();
if(wgt-1.>1e-10) {
generator()->log() << "Backward weight problem " << wgt << " " << wgt-1.
<< " " << ids[0] << " " << ids[1] << " " << ids[2] << " " << " " << z << " " << phi << "\n";
generator()->log() << "Weights \n";
for(unsigned int ix=0;ix<wgts.size();++ix)
generator()->log() << wgts[ix].first << " " << wgts[ix].second << "\n";
}
// soft correlations bit
double aziWgt = 1.;
if(softAllowed) {
Energy2 dot = pjk[0]+pjk[1]*cos(phi)+pjk[2]*sin(phi);
if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==1) {
aziWgt = (-m12/sqr(pik) -m22/sqr(dot) +2.*pipj/pik/dot)/aziMax;
}
else if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==2) {
aziWgt = max(ZERO,0.5/pik/Ek*(Ei-m12*Ek/pik + pipj*Ek/dot - Ej*pik/dot)/aziMax);
}
if(aziWgt-1.>1e-10||aziWgt<-1e-10) {
generator()->log() << "Backward soft weight problem " << aziWgt << " " << aziWgt-1.
<< " " << ids[0] << " " << ids[1] << " " << ids[2] << " " << " " << phi << "\n";
}
}
wgt *= aziWgt;
if(wgt>wgtMax) {
phiMax = phi;
wgtMax = wgt;
}
++ntry;
}
while(wgt<UseRandom::rnd()&&ntry<10000);
if(ntry==10000) {
generator()->log() << "Too many tries to generate phi in backward evolution\n";
phi = phiMax;
}
// return the azimuthal angle
return phi;
}
double QTildeSudakov::generatePhiDecay(ShowerParticle & particle,
const IdList & ids,
ShoKinPtr kinematics) {
// only soft correlations in this case
// no correlations, return flat phi
if( !(ShowerHandler::currentHandler()->evolver()->softCorrelations() &&
(ids[2]==ParticleID::g || ids[2]==ParticleID::gamma )))
return Constants::twopi*UseRandom::rnd();
// get the kinematic variables
double z = kinematics->z();
Energy pT = kinematics->pT();
// if soft correlations
// find the partner for the soft correlations
tShowerParticlePtr partner = findCorrelationPartner(particle,true,splittingFn()->interactionType());
double zFact(1.-z);
vector<Lorentz5Momentum> basis = kinematics->getBasis();
// compute the transforms to the shower reference frame
// first the boost
Lorentz5Momentum pVect = basis[0];
Lorentz5Momentum nVect = basis[1];
assert(kinematics->frame()==ShowerKinematics::Rest);
Boost beta_bb = -pVect.boostVector();
pVect.boost(beta_bb);
nVect.boost(beta_bb);
Axis axis = nVect.vect().unit();
// and then the rotation
LorentzRotation rot;
if(axis.perp2()>0.) {
double sinth(sqrt(sqr(axis.x())+sqr(axis.y())));
rot.rotate(acos(axis.z()),Axis(-axis.y()/sinth,axis.x()/sinth,0.));
}
else if(axis.z()<0.) {
rot.rotate(Constants::pi,Axis(1.,0.,0.));
}
rot.invert();
pVect *= rot;
nVect *= rot;
// shower parameters
Energy2 pn = pVect*nVect;
Energy2 m2 = pVect.m2();
double alpha0 = particle.showerParameters().alpha;
double beta0 = 0.5/alpha0/pn*
(sqr(particle.dataPtr()->mass())-sqr(alpha0)*m2+sqr(particle.showerParameters().pt));
Lorentz5Momentum qperp0(particle.showerParameters().ptx,
particle.showerParameters().pty,ZERO,ZERO);
Lorentz5Momentum pj = partner->momentum();
pj.boost(beta_bb);
pj *= rot;
// compute the two phi independent dot products
Energy2 pik = 0.5*zFact*(sqr(alpha0)*m2 - sqr(particle.showerParameters().pt) + 2.*alpha0*beta0*pn )
+0.5*sqr(pT)/zFact;
Energy2 dot1 = pj*pVect;
Energy2 dot2 = pj*nVect;
Energy2 dot3 = pj*qperp0;
Energy2 pipj = alpha0*dot1+beta0*dot2+dot3;
// compute the constants for the phi dependent dot product
vector<Energy2> pjk(3,ZERO);
pjk[0] = zFact*(alpha0*dot1+dot3-0.5*dot2/pn*(alpha0*m2-sqr(particle.showerParameters().pt)/alpha0))
+0.5*sqr(pT)*dot2/pn/zFact/alpha0;
pjk[1] = (pj.x() - dot2/alpha0/pn*qperp0.x())*pT;
pjk[2] = (pj.y() - dot2/alpha0/pn*qperp0.y())*pT;
Energy2 m12 = sqr(particle.dataPtr()->mass());
Energy2 m22 = sqr(partner->dataPtr()->mass());
Energy2 mag = sqrt(sqr(pjk[1])+sqr(pjk[2]));
InvEnergy2 aziMax;
vector<Energy> Ek(3,ZERO);
Energy Ei,Ej;
if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==1) {
aziMax = -m12/sqr(pik) -m22/sqr(pjk[0]+mag) +2.*pipj/pik/(pjk[0]-mag);
}
else if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==2) {
Ek[0] = zFact*(alpha0*pVect.t()+-0.5*nVect.t()/pn*(alpha0*m2-sqr(particle.showerParameters().pt)/alpha0))
+0.5*sqr(pT)*nVect.t()/pn/zFact/alpha0;
Ek[1] = -nVect.t()/alpha0/pn*qperp0.x()*pT;
Ek[2] = -nVect.t()/alpha0/pn*qperp0.y()*pT;
Energy mag2=sqrt(sqr(Ek[1])+sqr(Ek[2]));
Ei = alpha0*pVect.t()+beta0*nVect.t();
Ej = pj.t();
aziMax = 0.5/pik/(Ek[0]-mag2)*(Ei-m12*(Ek[0]-mag2)/pik + pipj*(Ek[0]+mag2)/(pjk[0]-mag) - Ej*pik/(pjk[0]-mag) );
}
else
assert(ShowerHandler::currentHandler()->evolver()->softCorrelations()==0);
// generate the azimuthal angle
double phi,wgt(0.);
unsigned int ntry(0);
double phiMax(0.),wgtMax(0.);
do {
phi = Constants::twopi*UseRandom::rnd();
Energy2 dot = pjk[0]+pjk[1]*cos(phi)+pjk[2]*sin(phi);
if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==1) {
wgt = (-m12/sqr(pik) -m22/sqr(dot) +2.*pipj/pik/dot)/aziMax;
}
else if(ShowerHandler::currentHandler()->evolver()->softCorrelations()==2) {
if(qperp0.m2()==ZERO) {
wgt = 1.;
}
else {
Energy Eg = Ek[0]+Ek[1]*cos(phi)+Ek[2]*sin(phi);
wgt = max(ZERO,0.5/pik/Eg*(Ei-m12*Eg/pik + (pipj*Eg - Ej*pik)/dot)/aziMax);
}
}
if(wgt-1.>1e-10||wgt<-1e-10) {
generator()->log() << "Decay soft weight problem " << wgt << " " << wgt-1.
<< " " << ids[0] << " " << ids[1] << " " << ids[2] << " " << " " << phi << "\n";
}
if(wgt>wgtMax) {
phiMax = phi;
wgtMax = wgt;
}
++ntry;
}
while(wgt<UseRandom::rnd()&&ntry<10000);
if(ntry==10000) {
phi = phiMax;
generator()->log() << "Too many tries to generate phi\n";
}
// return the azimuthal angle
return phi;
}
Energy QTildeSudakov::calculateScale(double zin, Energy pt, IdList ids,
unsigned int iopt) {
Energy2 tmin;
initialize(ids,tmin,false);
// final-state branching
if(iopt==0) {
Energy2 scale=(sqr(pt)+masssquared_[1]*(1.-zin)+masssquared_[2]*zin);
if(ids[0]!=ParticleID::g) scale -= zin*(1.-zin)*masssquared_[0];
scale /= sqr(zin*(1-zin));
return scale<=ZERO ? sqrt(tmin) : sqrt(scale);
}
else if(iopt==1) {
Energy2 scale=(sqr(pt)+zin*masssquared_[2])/sqr(1.-zin);
return scale<=ZERO ? sqrt(tmin) : sqrt(scale);
}
else if(iopt==2) {
Energy2 scale = (sqr(pt)+zin*masssquared_[2])/sqr(1.-zin)+masssquared_[0];
return scale<=ZERO ? sqrt(tmin) : sqrt(scale);
}
else {
throw Exception() << "Unknown option in QTildeSudakov::calculateScale() "
<< "iopt = " << iopt << Exception::runerror;
}
}
ShoKinPtr QTildeSudakov::createFinalStateBranching(Energy scale,double z,
double phi, Energy pt) {
ShoKinPtr showerKin = new_ptr(FS_QTildeShowerKinematics1to2());
showerKin->scale(scale);
showerKin->z(z);
showerKin->phi(phi);
showerKin->pT(pt);
showerKin->SudakovFormFactor(this);
return showerKin;
}
ShoKinPtr QTildeSudakov::createInitialStateBranching(Energy scale,double z,
double phi, Energy pt) {
ShoKinPtr showerKin = new_ptr(IS_QTildeShowerKinematics1to2());
showerKin->scale(scale);
showerKin->z(z);
showerKin->phi(phi);
showerKin->pT(pt);
showerKin->SudakovFormFactor(this);
return showerKin;
}
ShoKinPtr QTildeSudakov::createDecayBranching(Energy scale,double z,
double phi, Energy pt) {
ShoKinPtr showerKin = new_ptr(Decay_QTildeShowerKinematics1to2());
showerKin->scale(scale);
showerKin->z(z);
showerKin->phi(phi);
showerKin->pT(pt);
showerKin->SudakovFormFactor(this);
return showerKin;
}
diff --git a/Shower/Makefile.am b/Shower/Makefile.am
--- a/Shower/Makefile.am
+++ b/Shower/Makefile.am
@@ -1,50 +1,51 @@
SUBDIRS = Matching .
pkglib_LTLIBRARIES = HwShower.la
HwShower_la_LDFLAGS = $(AM_LDFLAGS) -module -version-info 21:0:0
HwShower_la_LIBADD = \
$(top_builddir)/PDF/libHwRemDecayer.la \
$(top_builddir)/PDF/libHwMPIPDF.la
HwShower_la_SOURCES = \
UEBase.h UEBase.cc UEBase.fh \
Couplings/ShowerAlphaQCD.h Couplings/ShowerAlphaQCD.cc \
Couplings/ShowerAlphaQED.h Couplings/ShowerAlphaQED.cc\
ShowerHandler.h ShowerHandler.fh ShowerHandler.cc \
SplittingFunctions/HalfHalfOneSplitFn.h SplittingFunctions/HalfHalfOneSplitFn.cc\
SplittingFunctions/OneOneOneSplitFn.h SplittingFunctions/OneOneOneSplitFn.cc\
SplittingFunctions/ZeroZeroOneSplitFn.h SplittingFunctions/ZeroZeroOneSplitFn.cc\
SplittingFunctions/OneHalfHalfSplitFn.h SplittingFunctions/OneHalfHalfSplitFn.cc\
SplittingFunctions/HalfOneHalfSplitFn.h SplittingFunctions/HalfOneHalfSplitFn.cc\
Default/QTildeSudakov.cc Default/QTildeSudakov.h\
Default/QTildeModel.cc Default/QTildeModel.h\
Default/Decay_QTildeShowerKinematics1to2.cc \
Default/Decay_QTildeShowerKinematics1to2.h \
Default/IS_QTildeShowerKinematics1to2.cc Default/IS_QTildeShowerKinematics1to2.h \
Default/FS_QTildeShowerKinematics1to2.cc Default/FS_QTildeShowerKinematics1to2.h \
Default/QTildeShowerKinematics1to2.cc Default/QTildeShowerKinematics1to2.fh\
Default/QTildeShowerKinematics1to2.h \
Default/QTildeFinder.cc Default/QTildeFinder.h\
Default/QTildeReconstructor.cc Default/QTildeReconstructor.h Default/QTildeReconstructor.tcc \
Base/KinematicsReconstructor.cc \
Base/KinematicsReconstructor.h \
Base/KinematicsReconstructor.fh \
Base/ShowerModel.cc Base/ShowerModel.h Base/ShowerModel.fh \
Base/PartnerFinder.h Base/PartnerFinder.fh Base/PartnerFinder.cc \
Base/Evolver.h Base/Evolver.fh Base/Evolver.cc \
-Base/ShowerVeto.h Base/ShowerVeto.fh Base/ShowerVeto.cc
+Base/ShowerVeto.h Base/ShowerVeto.fh Base/ShowerVeto.cc \
+Base/FullShowerVeto.h Base/FullShowerVeto.fh Base/FullShowerVeto.cc
noinst_LTLIBRARIES = libHwShower.la
libHwShower_la_SOURCES = ShowerConfig.h \
Base/Branching.h \
Base/ShowerParticle.cc Base/ShowerParticle.fh Base/ShowerParticle.h \
Base/ShowerKinematics.fh Base/ShowerKinematics.h Base/ShowerKinematics.cc \
Base/ShowerTree.h Base/ShowerTree.fh Base/ShowerTree.cc \
Base/ShowerProgenitor.fh Base/ShowerProgenitor.h \
Base/HardTree.h Base/HardTree.fh Base/HardTree.cc\
Base/SudakovFormFactor.cc Base/SudakovFormFactor.h Base/SudakovFormFactor.fh \
Base/HardBranching.h Base/HardBranching.fh Base/HardBranching.cc\
Couplings/ShowerAlpha.h Couplings/ShowerAlpha.cc Couplings/ShowerAlpha.fh\
SplittingFunctions/SplittingGenerator.cc SplittingFunctions/SplittingGenerator.h\
SplittingFunctions/SplittingGenerator.fh \
SplittingFunctions/SplittingFunction.h SplittingFunctions/SplittingFunction.fh \
SplittingFunctions/SplittingFunction.cc \
Base/ShowerVertex.cc Base/ShowerVertex.fh Base/ShowerVertex.h
diff --git a/src/Matchbox/GenericCollider.in b/src/Matchbox/GenericCollider.in
--- a/src/Matchbox/GenericCollider.in
+++ b/src/Matchbox/GenericCollider.in
@@ -1,99 +1,100 @@
# -*- ThePEG-repository -*-
cd /Herwig/Cuts
create ThePEG::Cuts Cuts
set Cuts:Fuzzy FuzzyTheta
set MatchboxJetMatcher:Factory /Herwig/MatrixElements/Matchbox/Factory
insert Cuts:OneCuts[0] PhotonCut
insert Cuts:OneCuts[1] LeptonCut
insert Cuts:OneCuts[2] TopQuarkCut
-insert Cuts:OneCuts[3] WBosonCut
-insert Cuts:OneCuts[4] ZBosonCut
-insert Cuts:OneCuts[5] HiggsBosonCut
-insert Cuts:OneCuts[6] ChargedLeptonCut
+insert Cuts:OneCuts[3] BottomQuarkCut
+insert Cuts:OneCuts[4] WBosonCut
+insert Cuts:OneCuts[5] ZBosonCut
+insert Cuts:OneCuts[6] HiggsBosonCut
+insert Cuts:OneCuts[7] ChargedLeptonCut
insert Cuts:TwoCuts[0] LeptonPairMassCut
insert Cuts:TwoCuts[1] ChargedLeptonPairMassCut
insert Cuts:TwoCuts[2] LeptonDeltaRCut
insert Cuts:TwoCuts[3] ChargedLeptonDeltaRCut
insert Cuts:MultiCuts[0] PhotonIsolationCut
insert Cuts:MultiCuts[1] MissingPtCut
cd /Herwig/MatrixElements/Matchbox
set MECorrectionHandler:Factory Factory
set Factory:Cuts /Herwig/Cuts/Cuts
cd /Herwig/EventHandlers
create ThePEG::StandardEventHandler EventHandler
set EventHandler:CascadeHandler /Herwig/Shower/ShowerHandler
set EventHandler:HadronizationHandler /Herwig/Hadronization/ClusterHadHandler
set EventHandler:DecayHandler /Herwig/Decays/DecayHandler
set EventHandler:Cuts /Herwig/Cuts/Cuts
set EventHandler:Sampler /Herwig/Samplers/Sampler
set EventHandler:Weighted Off
set EventHandler:CollisionCuts Off
insert EventHandler:SubProcessHandlers[0] /Herwig/MatrixElements/Matchbox/Factory
cd /Herwig/Generators
create ThePEG::EventGenerator EventGenerator
set EventGenerator:RandomNumberGenerator /Herwig/Random
set EventGenerator:StandardModelParameters /Herwig/Model
set EventGenerator:EventHandler /Herwig/EventHandlers/EventHandler
set EventGenerator:Strategy DefaultStrategy
set EventGenerator:DumpPeriod -1
set EventGenerator:RandomNumberGenerator:Seed 31122001
set EventGenerator:DebugLevel 1
set EventGenerator:PrintEvent 10
set EventGenerator:MaxErrors 10000
set EventGenerator:NumberOfEvents 100000000
insert EventGenerator:AnalysisHandlers 0 /Herwig/Analysis/Basics
cd /Herwig/Particles
set d:NominalMass 0*GeV
set dbar:NominalMass 0*GeV
set u:NominalMass 0*GeV
set ubar:NominalMass 0*GeV
set s:NominalMass 0*GeV
set sbar:NominalMass 0*GeV
set c:HardProcessMass 0*GeV
set cbar:HardProcessMass 0*GeV
set b:HardProcessMass 0*GeV
set bbar:HardProcessMass 0*GeV
set e+:HardProcessMass 0*GeV
set e-:HardProcessMass 0*GeV
set mu+:HardProcessMass 0*GeV
set mu-:HardProcessMass 0*GeV
set nu_e:HardProcessMass 0*GeV
set nu_ebar:HardProcessMass 0*GeV
set nu_mu:HardProcessMass 0*GeV
set nu_mubar:HardProcessMass 0*GeV
set nu_tau:HardProcessMass 0*GeV
set nu_taubar:HardProcessMass 0*GeV
cd /Herwig/Partons
set /Herwig/Particles/p+:PDF HardNLOPDF
set /Herwig/Particles/pbar-:PDF HardNLOPDF
set /Herwig/Partons/QCDExtractor:FirstPDF HardNLOPDF
set /Herwig/Partons/QCDExtractor:SecondPDF HardNLOPDF
set /Herwig/Shower/ShowerHandler:PDFA ShowerNLOPDF
set /Herwig/Shower/ShowerHandler:PDFB ShowerNLOPDF
set /Herwig/DipoleShower/DipoleShowerHandler:PDFA ShowerNLOPDF
set /Herwig/DipoleShower/DipoleShowerHandler:PDFB ShowerNLOPDF
set /Herwig/Generators/EventGenerator:StandardModelParameters:QCD/RunningAlphaS /Herwig/Couplings/NLOAlphaS
diff --git a/src/defaults/Cuts.in b/src/defaults/Cuts.in
--- a/src/defaults/Cuts.in
+++ b/src/defaults/Cuts.in
@@ -1,125 +1,126 @@
# -*- ThePEG-repository -*-
###########################################################
# Default cuts (applied to the hard subprocess)
#
# Don't change values here, re-set them in your own input
# files using these as examples.
###########################################################
mkdir /Herwig/Matchers
cd /Herwig/Matchers
create ThePEG::Matcher<Lepton> Lepton
create ThePEG::Matcher<Neutrino> Neutrino
create ThePEG::Matcher<ChargedLepton> ChargedLepton
create ThePEG::Matcher<LightQuark> LightQuark
create ThePEG::Matcher<LightAntiQuark> LightAntiQuark
create ThePEG::Matcher<StandardQCDParton> StandardQCDParton
create ThePEG::Matcher<Photon> Photon
create ThePEG::Matcher<Top> Top
+create ThePEG::Matcher<Bottom> Bottom
create ThePEG::Matcher<WBoson> WBoson
create ThePEG::Matcher<ZBoson> ZBoson
create ThePEG::Matcher<HiggsBoson> HiggsBoson
mkdir /Herwig/Cuts
cd /Herwig/Cuts
# create the cuts object for e+e-
create ThePEG::Cuts EECuts
newdef EECuts:MHatMin 22.36*GeV
# create the cuts object for hadron collisions
create ThePEG::Cuts QCDCuts
newdef QCDCuts:ScaleMin 2.0*GeV
newdef QCDCuts:X1Min 1.0e-5
newdef QCDCuts:X2Min 1.0e-5
newdef QCDCuts:MHatMin 20.*GeV
# cut on jet pt
create ThePEG::SimpleKTCut JetKtCut SimpleKTCut.so
newdef JetKtCut:Matcher /Herwig/Matchers/StandardQCDParton
newdef JetKtCut:MinKT 20.0*GeV
# cut on photon
create ThePEG::SimpleKTCut PhotonKtCut SimpleKTCut.so
newdef PhotonKtCut:Matcher /Herwig/Matchers/Photon
newdef PhotonKtCut:MinKT 20.0*GeV
newdef PhotonKtCut:MinEta -3.
newdef PhotonKtCut:MaxEta 3.
# cut on leptons
create ThePEG::SimpleKTCut LeptonKtCut SimpleKTCut.so
newdef LeptonKtCut:Matcher /Herwig/Matchers/Lepton
newdef LeptonKtCut:MinKT 0.0*GeV
# cut on charged leptons
create ThePEG::SimpleKTCut ChargedLeptonKtCut SimpleKTCut.so
newdef ChargedLeptonKtCut:Matcher /Herwig/Matchers/ChargedLepton
newdef ChargedLeptonKtCut:MinKT 0.0*GeV
# cut on top quarks
create ThePEG::KTRapidityCut TopKtCut KTRapidityCut.so
newdef TopKtCut:Matcher /Herwig/Matchers/Top
newdef TopKtCut:MinKT 0.0*GeV
# cut on W bosons
create ThePEG::KTRapidityCut WBosonKtCut KTRapidityCut.so
newdef WBosonKtCut:Matcher /Herwig/Matchers/WBoson
newdef WBosonKtCut:MinKT 0.0*GeV
# cut on Z bosons
create ThePEG::KTRapidityCut ZBosonKtCut KTRapidityCut.so
newdef ZBosonKtCut:Matcher /Herwig/Matchers/ZBoson
newdef ZBosonKtCut:MinKT 0.0*GeV
# cut on Higgs bosons
create ThePEG::KTRapidityCut HiggsBosonKtCut KTRapidityCut.so
newdef HiggsBosonKtCut:Matcher /Herwig/Matchers/HiggsBoson
newdef HiggsBosonKtCut:MinKT 0.0*GeV
# create a cut on the invariant mass of lepton pairs
create ThePEG::V2LeptonsCut MassCut V2LeptonsCut.so
newdef MassCut:Families All
newdef MassCut:CComb All
newdef MassCut:MinM 20.*GeV
newdef MassCut:MaxM 14000.*GeV
# create a cut on Q^2 for neutral current DIS
create ThePEG::SimpleDISCut NeutralCurrentCut SimpleDISCut.so
newdef NeutralCurrentCut:MinQ2 20.
newdef NeutralCurrentCut:Current Neutral
# create a cut on Q^2 for charged current DIS
create ThePEG::SimpleDISCut ChargedCurrentCut SimpleDISCut.so
newdef ChargedCurrentCut:MinQ2 20.
newdef ChargedCurrentCut:Current Charged
# create a cut of Q^2 for charged current DIS
# insert into hadron cuts
insert QCDCuts:OneCuts[0] JetKtCut
insert QCDCuts:OneCuts[1] PhotonKtCut
insert QCDCuts:OneCuts[2] LeptonKtCut
insert QCDCuts:OneCuts[3] TopKtCut
insert QCDCuts:OneCuts[4] WBosonKtCut
insert QCDCuts:OneCuts[5] ZBosonKtCut
insert QCDCuts:OneCuts[6] HiggsBosonKtCut
insert QCDCuts:OneCuts[7] ChargedLeptonKtCut
insert QCDCuts:MultiCuts[0] MassCut
# cuts for DIS
create ThePEG::Cuts DISCuts
newdef DISCuts:ScaleMin 1.0*GeV
newdef DISCuts:X1Min 1.0e-5
newdef DISCuts:X2Min 1.0e-5
insert DISCuts:TwoCuts[0] NeutralCurrentCut
insert DISCuts:TwoCuts[1] ChargedCurrentCut
# create diffrent cuts object for MinBias to avoid numerical problems
create ThePEG::Cuts MinBiasCuts
newdef MinBiasCuts:ScaleMin 2.0*GeV
newdef MinBiasCuts:X1Min 0.055
newdef MinBiasCuts:X2Min 0.055
newdef MinBiasCuts:MHatMin 0.0*GeV
diff --git a/src/defaults/MatchboxDefaults.in.in b/src/defaults/MatchboxDefaults.in.in
--- a/src/defaults/MatchboxDefaults.in.in
+++ b/src/defaults/MatchboxDefaults.in.in
@@ -1,774 +1,781 @@
# -*- ThePEG-repository -*-
################################################################################
#
# Default setup for Matchbox matrix element generation.
# You do not need to make any change in here; processes of
# interest can be chosen in the standard input files.
#
################################################################################
################################################################################
# Load libraries
################################################################################
library JetCuts.so
library FastJetFinder.so
library HwMatchboxScales.so
library HwMatchboxCuts.so
library HwSampling.so
library HwColorFull.so
library HwMatchboxBuiltin.so
################################################################################
# Integration/sampling
################################################################################
mkdir /Herwig/Samplers
cd /Herwig/Samplers
create Herwig::BinSampler FlatBinSampler
set FlatBinSampler:InitialPoints 1000
set FlatBinSampler:UseAllIterations No
create Herwig::CellGridSampler CellGridSampler
set CellGridSampler:InitialPoints 10000
set CellGridSampler:ExplorationPoints 500
set CellGridSampler:ExplorationSteps 4
set CellGridSampler:Gain 0.3
set CellGridSampler:Epsilon 1.0
set CellGridSampler:MinimumSelection 0.000001
set CellGridSampler:NIterations 1
set CellGridSampler:EnhancementFactor 1
set CellGridSampler:UseAllIterations No
set CellGridSampler:RemapperPoints 50000
set CellGridSampler:RemapperMinSelection 0.00001
set CellGridSampler:RemapChannelDimension Yes
set CellGridSampler:LuminosityMapperBins 20
set CellGridSampler:GeneralMapperBins 0
set CellGridSampler:HalfPoints No
set CellGridSampler:MaxNewMax 30
set CellGridSampler:NonZeroInPresampling Yes
create Herwig::MonacoSampler MonacoSampler
set MonacoSampler:InitialPoints 15000
set MonacoSampler:NIterations 4
set MonacoSampler:EnhancementFactor 1.2
set MonacoSampler:UseAllIterations No
set MonacoSampler:RemapChannelDimension No
set MonacoSampler:LuminosityMapperBins 0
set MonacoSampler:HalfPoints No
set MonacoSampler:MaxNewMax 30
set MonacoSampler:NonZeroInPresampling Yes
create Herwig::GeneralSampler Sampler
set Sampler:UpdateAfter 1000
set Sampler:BinSampler CellGridSampler
set Sampler:AddUpSamplers Off
set Sampler:GlobalMaximumWeight Off
set Sampler:FlatSubprocesses Off
set Sampler:MinSelection 0.000001
set Sampler:AlmostUnweighted Off
set Sampler:RunCombinationData Off
set Sampler:WriteGridsOnFinish No
set Sampler:MaxEnhancement 1.1
################################################################################
# Setup the factory object
################################################################################
mkdir /Herwig/MatrixElements/Matchbox
cd /Herwig/MatrixElements/Matchbox
create Herwig::MatchboxFactory Factory
do Factory:StartParticleGroup p
insert Factory:ParticleGroup 0 /Herwig/Particles/b
insert Factory:ParticleGroup 0 /Herwig/Particles/bbar
insert Factory:ParticleGroup 0 /Herwig/Particles/c
insert Factory:ParticleGroup 0 /Herwig/Particles/cbar
insert Factory:ParticleGroup 0 /Herwig/Particles/s
insert Factory:ParticleGroup 0 /Herwig/Particles/sbar
insert Factory:ParticleGroup 0 /Herwig/Particles/d
insert Factory:ParticleGroup 0 /Herwig/Particles/dbar
insert Factory:ParticleGroup 0 /Herwig/Particles/u
insert Factory:ParticleGroup 0 /Herwig/Particles/ubar
insert Factory:ParticleGroup 0 /Herwig/Particles/g
do Factory:EndParticleGroup
do Factory:StartParticleGroup pbar
insert Factory:ParticleGroup 0 /Herwig/Particles/b
insert Factory:ParticleGroup 0 /Herwig/Particles/bbar
insert Factory:ParticleGroup 0 /Herwig/Particles/c
insert Factory:ParticleGroup 0 /Herwig/Particles/cbar
insert Factory:ParticleGroup 0 /Herwig/Particles/s
insert Factory:ParticleGroup 0 /Herwig/Particles/sbar
insert Factory:ParticleGroup 0 /Herwig/Particles/d
insert Factory:ParticleGroup 0 /Herwig/Particles/dbar
insert Factory:ParticleGroup 0 /Herwig/Particles/u
insert Factory:ParticleGroup 0 /Herwig/Particles/ubar
insert Factory:ParticleGroup 0 /Herwig/Particles/g
do Factory:EndParticleGroup
do Factory:StartParticleGroup j
insert Factory:ParticleGroup 0 /Herwig/Particles/b
insert Factory:ParticleGroup 0 /Herwig/Particles/bbar
insert Factory:ParticleGroup 0 /Herwig/Particles/c
insert Factory:ParticleGroup 0 /Herwig/Particles/cbar
insert Factory:ParticleGroup 0 /Herwig/Particles/s
insert Factory:ParticleGroup 0 /Herwig/Particles/sbar
insert Factory:ParticleGroup 0 /Herwig/Particles/d
insert Factory:ParticleGroup 0 /Herwig/Particles/dbar
insert Factory:ParticleGroup 0 /Herwig/Particles/u
insert Factory:ParticleGroup 0 /Herwig/Particles/ubar
insert Factory:ParticleGroup 0 /Herwig/Particles/g
do Factory:EndParticleGroup
do Factory:StartParticleGroup u
insert Factory:ParticleGroup 0 /Herwig/Particles/u
do Factory:EndParticleGroup
do Factory:StartParticleGroup ubar
insert Factory:ParticleGroup 0 /Herwig/Particles/ubar
do Factory:EndParticleGroup
do Factory:StartParticleGroup d
insert Factory:ParticleGroup 0 /Herwig/Particles/d
do Factory:EndParticleGroup
do Factory:StartParticleGroup dbar
insert Factory:ParticleGroup 0 /Herwig/Particles/dbar
do Factory:EndParticleGroup
do Factory:StartParticleGroup s
insert Factory:ParticleGroup 0 /Herwig/Particles/s
do Factory:EndParticleGroup
do Factory:StartParticleGroup sbar
insert Factory:ParticleGroup 0 /Herwig/Particles/sbar
do Factory:EndParticleGroup
do Factory:StartParticleGroup c
insert Factory:ParticleGroup 0 /Herwig/Particles/c
do Factory:EndParticleGroup
do Factory:StartParticleGroup cbar
insert Factory:ParticleGroup 0 /Herwig/Particles/cbar
do Factory:EndParticleGroup
do Factory:StartParticleGroup b
insert Factory:ParticleGroup 0 /Herwig/Particles/b
do Factory:EndParticleGroup
do Factory:StartParticleGroup bbar
insert Factory:ParticleGroup 0 /Herwig/Particles/bbar
do Factory:EndParticleGroup
do Factory:StartParticleGroup t
insert Factory:ParticleGroup 0 /Herwig/Particles/t
do Factory:EndParticleGroup
do Factory:StartParticleGroup tbar
insert Factory:ParticleGroup 0 /Herwig/Particles/tbar
do Factory:EndParticleGroup
do Factory:StartParticleGroup g
insert Factory:ParticleGroup 0 /Herwig/Particles/g
do Factory:EndParticleGroup
do Factory:StartParticleGroup gamma
insert Factory:ParticleGroup 0 /Herwig/Particles/gamma
do Factory:EndParticleGroup
do Factory:StartParticleGroup h0
insert Factory:ParticleGroup 0 /Herwig/Particles/h0
do Factory:EndParticleGroup
do Factory:StartParticleGroup W+
insert Factory:ParticleGroup 0 /Herwig/Particles/W+
do Factory:EndParticleGroup
do Factory:StartParticleGroup W-
insert Factory:ParticleGroup 0 /Herwig/Particles/W-
do Factory:EndParticleGroup
do Factory:StartParticleGroup Z0
insert Factory:ParticleGroup 0 /Herwig/Particles/Z0
do Factory:EndParticleGroup
do Factory:StartParticleGroup e+
insert Factory:ParticleGroup 0 /Herwig/Particles/e+
do Factory:EndParticleGroup
do Factory:StartParticleGroup e-
insert Factory:ParticleGroup 0 /Herwig/Particles/e-
do Factory:EndParticleGroup
do Factory:StartParticleGroup mu+
insert Factory:ParticleGroup 0 /Herwig/Particles/mu+
do Factory:EndParticleGroup
do Factory:StartParticleGroup mu-
insert Factory:ParticleGroup 0 /Herwig/Particles/mu-
do Factory:EndParticleGroup
do Factory:StartParticleGroup tau+
insert Factory:ParticleGroup 0 /Herwig/Particles/tau+
do Factory:EndParticleGroup
do Factory:StartParticleGroup tau-
insert Factory:ParticleGroup 0 /Herwig/Particles/tau-
do Factory:EndParticleGroup
do Factory:StartParticleGroup nu_e
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_e
do Factory:EndParticleGroup
do Factory:StartParticleGroup nu_mu
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_mu
do Factory:EndParticleGroup
do Factory:StartParticleGroup nu_tau
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_tau
do Factory:EndParticleGroup
do Factory:StartParticleGroup nu_ebar
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_ebar
do Factory:EndParticleGroup
do Factory:StartParticleGroup nu_mubar
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_mubar
do Factory:EndParticleGroup
do Factory:StartParticleGroup nu_taubar
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_taubar
do Factory:EndParticleGroup
do Factory:StartParticleGroup l
insert Factory:ParticleGroup 0 /Herwig/Particles/e+
insert Factory:ParticleGroup 0 /Herwig/Particles/mu+
insert Factory:ParticleGroup 0 /Herwig/Particles/e-
insert Factory:ParticleGroup 0 /Herwig/Particles/mu-
do Factory:EndParticleGroup
do Factory:StartParticleGroup nu
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_e
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_mu
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_ebar
insert Factory:ParticleGroup 0 /Herwig/Particles/nu_mubar
do Factory:EndParticleGroup
do Factory:StartParticleGroup l+
insert Factory:ParticleGroup 0 /Herwig/Particles/e+
insert Factory:ParticleGroup 0 /Herwig/Particles/mu+
do Factory:EndParticleGroup
do Factory:StartParticleGroup l-
insert Factory:ParticleGroup 0 /Herwig/Particles/e-
insert Factory:ParticleGroup 0 /Herwig/Particles/mu-
do Factory:EndParticleGroup
################################################################################
# Default settings for hard process widths
################################################################################
set /Herwig/Particles/mu+:HardProcessWidth 0*GeV
set /Herwig/Particles/mu-:HardProcessWidth 0*GeV
set /Herwig/Particles/tau+:HardProcessWidth 0*GeV
set /Herwig/Particles/tau-:HardProcessWidth 0*GeV
################################################################################
# Setup amplitudes
################################################################################
cd /Herwig/MatrixElements/Matchbox
mkdir Amplitudes
cd Amplitudes
create ColorFull::TraceBasis TraceBasis
create Herwig::MatchboxHybridAmplitude GenericProcesses
@LOAD_MADGRAPH@ HwMatchboxMadGraph.so
@CREATE_MADGRAPH@ Herwig::MadGraphAmplitude MadGraph
@SET_MADGRAPH@ MadGraph:ColourBasis TraceBasis
@LOAD_GOSAM@ HwMatchboxGoSam.so
@CREATE_GOSAM@ Herwig::GoSamAmplitude GoSam
@LOAD_NJET@ HwMatchboxNJet.so
@CREATE_NJET@ Herwig::NJetsAmplitude NJet
@DO_NJET@ NJet:Massless 5
@DO_NJET@ NJet:Massless -5
@LOAD_OPENLOOPS@ HwMatchboxOpenLoops.so
@CREATE_OPENLOOPS@ Herwig::OpenLoopsAmplitude OpenLoops
@LOAD_VBFNLO@ HwMatchboxVBFNLO.so
@CREATE_VBFNLO@ Herwig::VBFNLOAmplitude VBFNLO
mkdir Builtin
cd Builtin
create Herwig::SimpleColourBasis SimpleColourBasis
create Herwig::SimpleColourBasis2 SimpleColourBasis2
create Herwig::MatchboxAmplitudellbarqqbar Amplitudellbarqqbar
set Amplitudellbarqqbar:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudellbarqqbarg Amplitudellbarqqbarg
set Amplitudellbarqqbarg:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudellbarqqbargg Amplitudellbarqqbargg
set Amplitudellbarqqbargg:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudellbarqqbarqqbar Amplitudellbarqqbarqqbar
set Amplitudellbarqqbarqqbar:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudelnuqqbar Amplitudelnuqqbar
set Amplitudelnuqqbar:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudelnuqqbarg Amplitudelnuqqbarg
set Amplitudelnuqqbarg:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudelnuqqbargg Amplitudelnuqqbargg
set Amplitudelnuqqbargg:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudelnuqqbarqqbar Amplitudelnuqqbarqqbar
set Amplitudelnuqqbarqqbar:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudehgg Amplitudehgg
set Amplitudehgg:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudehggg Amplitudehggg
set Amplitudehggg:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudehqqbarg Amplitudehqqbarg
set Amplitudehqqbarg:ColourBasis SimpleColourBasis
create Herwig::MatchboxAmplitudeqqbarttbar Amplitudeqqbarttbar
set Amplitudeqqbarttbar:ColourBasis SimpleColourBasis2
create Herwig::MatchboxAmplitudeqqbarttbarg Amplitudeqqbarttbarg
set Amplitudeqqbarttbarg:ColourBasis SimpleColourBasis2
create Herwig::MatchboxAmplitudeggttbar Amplitudeggttbar
set Amplitudeggttbar:ColourBasis SimpleColourBasis2
create Herwig::MatchboxAmplitudeggttbarg Amplitudeggttbarg
set Amplitudeggttbarg:ColourBasis SimpleColourBasis2
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudellbarqqbar
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudellbarqqbarg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudellbarqqbargg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudellbarqqbarqqbar
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudelnuqqbar
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudelnuqqbarg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudelnuqqbargg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudelnuqqbarqqbar
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudehgg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudehggg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudehqqbarg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudeqqbarttbar
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudeqqbarttbarg
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudeggttbar
insert /Herwig/MatrixElements/Matchbox/Factory:Amplitudes 0 Amplitudeggttbarg
################################################################################
# Setup phasespace generators
################################################################################
cd /Herwig/MatrixElements/Matchbox
mkdir Phasespace
cd Phasespace
create Herwig::PhasespaceCouplings PhasespaceCouplings
create Herwig::MatchboxRambo Rambo
set Rambo:CouplingData PhasespaceCouplings
create Herwig::FlatInvertiblePhasespace InvertiblePhasespace
set InvertiblePhasespace:CouplingData PhasespaceCouplings
create Herwig::FlatInvertibleLabframePhasespace InvertibleLabframePhasespace
set InvertibleLabframePhasespace:CouplingData PhasespaceCouplings
set InvertibleLabframePhasespace:LogSHat False
create Herwig::TreePhasespaceChannels TreePhasespaceChannels
create Herwig::TreePhasespace TreePhasespace
set TreePhasespace:ChannelMap TreePhasespaceChannels
set TreePhasespace:M0 0.0001*GeV
set TreePhasespace:MC 0.000001*GeV
set TreePhasespace:CouplingData PhasespaceCouplings
do TreePhasespace:SetPhysicalCoupling 21 -1 1 0.059
do TreePhasespace:SetPhysicalCoupling 21 -2 2 0.059
do TreePhasespace:SetPhysicalCoupling 21 -3 3 0.059
do TreePhasespace:SetPhysicalCoupling 21 -4 4 0.059
do TreePhasespace:SetPhysicalCoupling 21 -5 5 0.059
do TreePhasespace:SetPhysicalCoupling 21 -6 6 0.059
do TreePhasespace:SetPhysicalCoupling 21 1 -1 0.059
do TreePhasespace:SetPhysicalCoupling 21 2 -2 0.059
do TreePhasespace:SetPhysicalCoupling 21 3 -3 0.059
do TreePhasespace:SetPhysicalCoupling 21 4 -4 0.059
do TreePhasespace:SetPhysicalCoupling 21 5 -5 0.059
do TreePhasespace:SetPhysicalCoupling 21 6 -6 0.059
do TreePhasespace:SetPhysicalCoupling 1 21 1 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 2 21 2 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 3 21 3 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 4 21 4 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 5 21 5 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 6 21 6 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -1 21 -1 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -2 21 -2 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -3 21 -3 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -4 21 -4 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -5 21 -5 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -6 21 -6 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 1 1 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 2 2 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 3 3 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 4 4 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 5 5 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling 6 6 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -1 -1 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -2 -2 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -3 -3 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -4 -4 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -5 -5 21 0.15733333333333333333
do TreePhasespace:SetPhysicalCoupling -6 -6 21 0.15733333333333333333
do TreePhasespace:SetCoupling 25 -1 1 0
do TreePhasespace:SetCoupling 25 -2 2 0
do TreePhasespace:SetCoupling 25 -3 3 0.00000001184279069851
do TreePhasespace:SetCoupling 25 -4 4 0.00000205034465001885
do TreePhasespace:SetCoupling 25 -5 5 0.00002314757096085280
do TreePhasespace:SetCoupling 25 -6 6 0.03982017320025470767
do TreePhasespace:SetCoupling 25 -11 11 0.00000000000034264835
do TreePhasespace:SetCoupling 25 -12 12 0
do TreePhasespace:SetCoupling 25 -13 13 0.00000001464912263400
do TreePhasespace:SetCoupling 25 -14 14 0
do TreePhasespace:SetCoupling 25 -15 15 0.00000414359033108195
do TreePhasespace:SetCoupling 25 -16 16 0
do TreePhasespace:SetCoupling 22 -1 1 0.00083932358497608365
do TreePhasespace:SetCoupling 22 -2 2 0.00335729433990433461
do TreePhasespace:SetCoupling 22 -3 3 0.00083932358497608365
do TreePhasespace:SetCoupling 22 -4 4 0.00335729433990433461
do TreePhasespace:SetCoupling 22 -5 5 0.00083932358497608365
do TreePhasespace:SetCoupling 22 -6 6 0.00335729433990433461
do TreePhasespace:SetCoupling 22 -11 11 0.00755391226478475287
do TreePhasespace:SetCoupling 22 -13 13 0.00755391226478475287
do TreePhasespace:SetCoupling 22 -15 15 0.00755391226478475287
do TreePhasespace:SetCoupling 24 -2 1 0.01652748072644379386
do TreePhasespace:SetCoupling 24 -4 1 0.00382028458188709739
do TreePhasespace:SetCoupling 24 -6 1 0.00014707756360995175
do TreePhasespace:SetCoupling 24 -2 3 0.00382265953677814621
do TreePhasespace:SetCoupling 24 -4 3 0.01651340063673257587
do TreePhasespace:SetCoupling 24 -6 3 0.00068534412570265868
do TreePhasespace:SetCoupling 24 -2 5 0.00005954351191129535
do TreePhasespace:SetCoupling 24 -4 5 0.00069891529650865192
do TreePhasespace:SetCoupling 24 -6 5 0.01694947628265615369
do TreePhasespace:SetCoupling 24 -12 11 0.01696396350749155147
do TreePhasespace:SetCoupling 24 -14 13 0.01696396350749155147
do TreePhasespace:SetCoupling 24 -16 15 0.01696396350749155147
do TreePhasespace:SetCoupling -24 2 -1 0.01652748072644379386
do TreePhasespace:SetCoupling -24 4 -1 0.00382028458188709739
do TreePhasespace:SetCoupling -24 6 -1 0.00014707756360995175
do TreePhasespace:SetCoupling -24 2 -3 0.00382265953677814621
do TreePhasespace:SetCoupling -24 4 -3 0.01651340063673257587
do TreePhasespace:SetCoupling -24 6 -3 0.00068534412570265868
do TreePhasespace:SetCoupling -24 2 -5 0.00005954351191129535
do TreePhasespace:SetCoupling -24 4 -5 0.00069891529650865192
do TreePhasespace:SetCoupling -24 6 -5 0.01694947628265615369
do TreePhasespace:SetCoupling -24 12 -11 0.01696396350749155147
do TreePhasespace:SetCoupling -24 14 -13 0.01696396350749155147
do TreePhasespace:SetCoupling -24 16 -15 0.01696396350749155147
do TreePhasespace:SetCoupling 23 -1 1 0.00407649129960709158
do TreePhasespace:SetCoupling 23 -2 2 0.00317809816318353030
do TreePhasespace:SetCoupling 23 -3 3 0.00407649129960709158
do TreePhasespace:SetCoupling 23 -4 4 0.00317809816318353030
do TreePhasespace:SetCoupling 23 -5 5 0.00407649129960709158
do TreePhasespace:SetCoupling 23 -6 6 0.00317809816318353030
do TreePhasespace:SetCoupling 23 -11 11 0.00276049468148072129
do TreePhasespace:SetCoupling 23 -12 12 0.00545567409075140513
do TreePhasespace:SetCoupling 23 -13 13 0.00276049468148072129
do TreePhasespace:SetCoupling 23 -14 14 0.00545567409075140513
do TreePhasespace:SetCoupling 23 -15 15 0.00276049468148072129
do TreePhasespace:SetCoupling 23 -16 16 0.00545567409075140513
do TreePhasespace:SetCoupling 21 21 21 0.354
do TreePhasespace:SetCoupling 25 21 21 0.00000000016160437564
do TreePhasespace:SetCoupling 25 25 25 0.18719783125611995353
do TreePhasespace:SetCoupling 25 22 22 0.00000000006295673620
do TreePhasespace:SetCoupling 25 24 -24 219.30463760755686425818
do TreePhasespace:SetCoupling 25 23 23 362.91922658249853887524
do TreePhasespace:SetCoupling 22 24 -24 0.00755391226478475287
do TreePhasespace:SetCoupling 23 24 -24 0.02637401475019835008
@CREATE_VBFNLO@ Herwig::VBFNLOPhasespace VBFNLOPhasespace
@SET_VBFNLO@ VBFNLOPhasespace:CouplingData PhasespaceCouplings
set /Herwig/MatrixElements/Matchbox/Factory:Phasespace TreePhasespace
################################################################################
# Setup utilities for matching
################################################################################
cd /Herwig/MatrixElements/Matchbox
create Herwig::HardScaleProfile HardScaleProfile
create Herwig::MEMatching MEMatching
set MEMatching:RestrictPhasespace On
set MEMatching:HardScaleProfile /Herwig/MatrixElements/Matchbox/HardScaleProfile
set MEMatching:BornScaleInSubtraction BornScale
set MEMatching:RealEmissionScaleInSubtraction RealScale
set MEMatching:EmissionScaleInSubtraction RealScale
set MEMatching:BornScaleInSplitting ShowerScale
set MEMatching:RealEmissionScaleInSplitting ShowerScale
set MEMatching:EmissionScaleInSplitting ShowerScale
set MEMatching:TruncatedShower Yes
set MEMatching:MaxPtIsMuF Yes
set MEMatching:FFPtCut 1.0*GeV
set MEMatching:FIPtCut 1.0*GeV
set MEMatching:IIPtCut 1.0*GeV
set MEMatching:SafeCut 0.*GeV
create Herwig::ShowerApproximationGenerator MECorrectionHandler
set MECorrectionHandler:ShowerApproximation MEMatching
set MECorrectionHandler:Phasespace /Herwig/MatrixElements/Matchbox/Phasespace/InvertiblePhasespace
set MECorrectionHandler:PresamplingPoints 50000
set MECorrectionHandler:FreezeGrid 100000
create Herwig::DipoleMatching DipoleMatching HwDipoleMatching.so
# set in DipoleShowerDefaults.in as not available at this point
# set DipoleMatching:ShowerHandler /Herwig/DipoleShower/DipoleShowerHandler
set DipoleMatching:BornScaleInSubtraction BornScale
set DipoleMatching:RealEmissionScaleInSubtraction BornScale
set DipoleMatching:EmissionScaleInSubtraction BornScale
set DipoleMatching:FFPtCut 1.0*GeV
set DipoleMatching:FIPtCut 1.0*GeV
set DipoleMatching:IIPtCut 1.0*GeV
set DipoleMatching:SafeCut 4.*GeV
create Herwig::QTildeMatching QTildeMatching HwQTildeMatching.so
set QTildeMatching:ShowerHandler /Herwig/Shower/ShowerHandler
set QTildeMatching:BornScaleInSubtraction BornScale
set QTildeMatching:RealEmissionScaleInSubtraction BornScale
set QTildeMatching:EmissionScaleInSubtraction BornScale
set QTildeMatching:QTildeFinder /Herwig/Shower/PartnerFinder
set QTildeMatching:SafeCut 4.*GeV
# just a dummy, since SudakovCommonn can't be used
# it's only used to get the value of the kinCutoffScale
set QTildeMatching:QTildeSudakov /Herwig/Shower/QtoQGSudakov
################################################################################
# Setup utilities for process generation
################################################################################
cd /Herwig/MatrixElements/Matchbox
mkdir Utility
cd Utility
create Herwig::Tree2toNGenerator DiagramGenerator
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/FFGVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/GGGVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/FFPVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/FFZVertex
cp /Herwig/Vertices/FFWVertex /Herwig/Vertices/FFWMatchboxVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/FFWMatchboxVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/WWHVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/WWWVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/HGGVertex
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/HHHVertex
cp /Herwig/Vertices/FFHVertex /Herwig/Vertices/TTHVertex
set /Herwig/Vertices/TTHVertex:Fermion 6
insert DiagramGenerator:Vertices 0 /Herwig/Vertices/TTHVertex
cp /Herwig/Vertices/FFHVertex /Herwig/Vertices/BBHVertex
set /Herwig/Vertices/BBHVertex:Fermion 5
create Herwig::ProcessData ProcessData
set /Herwig/MatrixElements/Matchbox/Factory:DiagramGenerator DiagramGenerator
set /Herwig/MatrixElements/Matchbox/Factory:ProcessData ProcessData
################################################################################
# Setup jet cuts
################################################################################
cd /Herwig/Cuts
create Herwig::MatchboxFactoryMatcher MatchboxJetMatcher
set MatchboxJetMatcher:Group j
create ThePEG::FastJetFinder JetFinder
set JetFinder:UnresolvedMatcher MatchboxJetMatcher
set JetFinder:Variant AntiKt
set JetFinder:RecombinationScheme E
set JetFinder:Mode Inclusive
set JetFinder:ConeRadius 0.7
create ThePEG::JetRegion FirstJet
set FirstJet:PtMin 20.*GeV
do FirstJet:YRange -5.0 5.0
set FirstJet:Fuzzy Yes
set FirstJet:EnergyCutWidth 4.0*GeV
set FirstJet:RapidityCutWidth 0.4
insert FirstJet:Accepts[0] 1
create ThePEG::JetRegion SecondJet
set SecondJet:PtMin 20.*GeV
do SecondJet:YRange -5.0 5.0
set SecondJet:Fuzzy Yes
set SecondJet:EnergyCutWidth 4.0*GeV
set SecondJet:RapidityCutWidth 0.4
insert SecondJet:Accepts[0] 2
create ThePEG::JetRegion ThirdJet
set ThirdJet:PtMin 20.*GeV
do ThirdJet:YRange -5.0 5.0
set ThirdJet:Fuzzy Yes
set ThirdJet:EnergyCutWidth 4.0*GeV
set ThirdJet:RapidityCutWidth 0.4
insert ThirdJet:Accepts[0] 3
create ThePEG::JetRegion FourthJet
set FourthJet:PtMin 20.*GeV
do FourthJet:YRange -5.0 5.0
set FourthJet:Fuzzy Yes
set FourthJet:EnergyCutWidth 4.0*GeV
set FourthJet:RapidityCutWidth 0.4
insert FourthJet:Accepts[0] 4
create ThePEG::FuzzyTheta FuzzyTheta
set FuzzyTheta:EnergyWidth 4.0*GeV
set FuzzyTheta:RapidityWidth 0.4
set FuzzyTheta:AngularWidth 0.4
create ThePEG::NJetsCut NJetsCut
set NJetsCut:UnresolvedMatcher MatchboxJetMatcher
set NJetsCut:NJetsMin 2
create ThePEG::JetCuts JetCuts
set JetCuts:UnresolvedMatcher MatchboxJetMatcher
set JetCuts:Ordering OrderPt
create Herwig::IdentifiedParticleCut IdentifiedParticleCut
cp IdentifiedParticleCut LeptonCut
set LeptonCut:Matcher /Herwig/Matchers/Lepton
cp IdentifiedParticleCut ChargedLeptonCut
set ChargedLeptonCut:Matcher /Herwig/Matchers/ChargedLepton
+cp IdentifiedParticleCut BottomQuarkCut
+set BottomQuarkCut:Matcher /Herwig/Matchers/Bottom
+
cp IdentifiedParticleCut TopQuarkCut
set TopQuarkCut:Matcher /Herwig/Matchers/Top
cp IdentifiedParticleCut WBosonCut
set WBosonCut:Matcher /Herwig/Matchers/WBoson
cp IdentifiedParticleCut ZBosonCut
set ZBosonCut:Matcher /Herwig/Matchers/ZBoson
cp IdentifiedParticleCut HiggsBosonCut
set HiggsBosonCut:Matcher /Herwig/Matchers/HiggsBoson
cp IdentifiedParticleCut PhotonCut
set PhotonCut:Matcher /Herwig/Matchers/Photon
create Herwig::FrixionePhotonSeparationCut PhotonIsolationCut
set PhotonIsolationCut:UnresolvedMatcher MatchboxJetMatcher
create Herwig::MatchboxDeltaRCut MatchboxDeltaRCut
cp MatchboxDeltaRCut LeptonDeltaRCut
set LeptonDeltaRCut:FirstMatcher /Herwig/Matchers/Lepton
set LeptonDeltaRCut:SecondMatcher /Herwig/Matchers/Lepton
cp MatchboxDeltaRCut ChargedLeptonDeltaRCut
set ChargedLeptonDeltaRCut:FirstMatcher /Herwig/Matchers/ChargedLepton
set ChargedLeptonDeltaRCut:SecondMatcher /Herwig/Matchers/ChargedLepton
create Herwig::InvariantMassCut InvariantMassCut
cp InvariantMassCut LeptonPairMassCut
set LeptonPairMassCut:FirstMatcher /Herwig/Matchers/Lepton
set LeptonPairMassCut:SecondMatcher /Herwig/Matchers/Lepton
cp InvariantMassCut ChargedLeptonPairMassCut
set ChargedLeptonPairMassCut:FirstMatcher /Herwig/Matchers/ChargedLepton
set ChargedLeptonPairMassCut:SecondMatcher /Herwig/Matchers/ChargedLepton
create Herwig::MissingPtCut MissingPtCut
set MissingPtCut:Matcher /Herwig/Matchers/Neutrino
+
+
################################################################################
# Setup scale choices
################################################################################
cd /Herwig/MatrixElements/Matchbox
mkdir Scales
cd Scales
create Herwig::MatchboxScaleChoice SHatScale
cp SHatScale FixedScale
set FixedScale:FixedScale 100.*GeV
create Herwig::MatchboxPtScale MaxJetPtScale
set MaxJetPtScale:JetFinder /Herwig/Cuts/JetFinder
create Herwig::MatchboxLeptonMassScale LeptonPairMassScale
create Herwig::MatchboxLeptonPtScale LeptonPairPtScale
create Herwig::MatchboxHtScale HTScale
create Herwig::MatchboxTopMassScale TopPairMassScale
create Herwig::MatchboxTopMTScale TopPairMTScale
set HTScale:JetFinder /Herwig/Cuts/JetFinder
set HTScale:IncludeMT No
+set HTScale:JetPtCut 15.*GeV
cp HTScale HTPrimeScale
set HTPrimeScale:IncludeMT Yes
+set HTPrimeScale:JetPtCut 15.*GeV
cp LeptonPairMassScale LeptonQ2Scale
set /Herwig/MatrixElements/Matchbox/Factory:ScaleChoice LeptonPairMassScale
################################################################################
# Factories for different colliders
# only provided for backwards compatibility; refer to Matchbox/*.in input file
# snippets for generic handling
################################################################################
cd /Herwig/MatrixElements/Matchbox
cp Factory EEFactory
set EEFactory:PartonExtractor /Herwig/Partons/EEExtractor
set EEFactory:Cuts /Herwig/Cuts/EECuts
set EEFactory:FirstPerturbativePDF No
set EEFactory:SecondPerturbativePDF No
cp Factory DISFactory
set DISFactory:PartonExtractor /Herwig/Partons/DISExtractor
set DISFactory:Cuts /Herwig/Cuts/DISCuts
set DISFactory:FirstPerturbativePDF No
set DISFactory:SecondPerturbativePDF Yes
cp Factory PPFactory
set PPFactory:PartonExtractor /Herwig/Partons/QCDExtractor
set PPFactory:Cuts /Herwig/Cuts/QCDCuts
set PPFactory:FirstPerturbativePDF Yes
set PPFactory:SecondPerturbativePDF Yes
cd /

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