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diff --git a/Shower/Makefile.am b/Shower/Makefile.am
--- a/Shower/Makefile.am
+++ b/Shower/Makefile.am
@@ -1,31 +1,28 @@
SUBDIRS = Dipole QTilde
noinst_LTLIBRARIES = libHwShower.la
libHwShower_la_LIBADD = \
$(top_builddir)/PDF/libHwMPIPDF.la\
$(top_builddir)/PDF/libHwRemDecayer.la
libHwShower_la_SOURCES = \
ShowerHandler.h ShowerHandler.fh ShowerHandler.cc \
ShowerVariation.h ShowerVariation.cc \
ShowerEventRecord.h ShowerEventRecord.cc \
PerturbativeProcess.h PerturbativeProcess.fh \
RealEmissionProcess.h RealEmissionProcess.fh \
UEBase.h UEBase.cc UEBase.fh \
Core/ShowerInteraction.h Core/ShowerConfig.h Core/ShowerConfig.cc \
Core/Base/Branching.h \
Core/Base/ShowerParticle.cc Core/Base/ShowerParticle.fh Core/Base/ShowerParticle.h \
Core/Base/ShowerKinematics.fh Core/Base/ShowerKinematics.h Core/Base/ShowerKinematics.cc \
Core/Base/ShowerBasis.fh Core/Base/ShowerBasis.h Core/Base/ShowerBasis.cc \
-Core/Base/ShowerTree.h Core/Base/ShowerTree.fh Core/Base/ShowerTree.cc \
Core/Base/ShowerProgenitor.fh Core/Base/ShowerProgenitor.h \
-Core/Base/HardTree.h Core/Base/HardTree.fh Core/Base/HardTree.cc\
Core/Base/SudakovFormFactor.cc Core/Base/SudakovFormFactor.h Core/Base/SudakovFormFactor.fh \
-Core/Base/HardBranching.h Core/Base/HardBranching.fh Core/Base/HardBranching.cc\
Core/Couplings/ShowerAlpha.h Core/Couplings/ShowerAlpha.cc Core/Couplings/ShowerAlpha.fh\
Core/SplittingFunctions/SplittingGenerator.cc Core/SplittingFunctions/SplittingGenerator.h\
Core/SplittingFunctions/SplittingGenerator.fh \
Core/SplittingFunctions/SplittingFunction.h Core/SplittingFunctions/SplittingFunction.fh \
Core/SplittingFunctions/SplittingFunction.cc \
Core/Base/ShowerVertex.cc Core/Base/ShowerVertex.fh Core/Base/ShowerVertex.h
diff --git a/Shower/QTilde/Base/FullShowerVeto.h b/Shower/QTilde/Base/FullShowerVeto.h
--- a/Shower/QTilde/Base/FullShowerVeto.h
+++ b/Shower/QTilde/Base/FullShowerVeto.h
@@ -1,155 +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 "Herwig/Shower/Core/Base/ShowerTree.h"
+#include "Herwig/Shower/QTilde/Base/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/Core/Base/HardBranching.cc b/Shower/QTilde/Base/HardBranching.cc
rename from Shower/Core/Base/HardBranching.cc
rename to Shower/QTilde/Base/HardBranching.cc
diff --git a/Shower/Core/Base/HardBranching.fh b/Shower/QTilde/Base/HardBranching.fh
rename from Shower/Core/Base/HardBranching.fh
rename to Shower/QTilde/Base/HardBranching.fh
diff --git a/Shower/Core/Base/HardBranching.h b/Shower/QTilde/Base/HardBranching.h
rename from Shower/Core/Base/HardBranching.h
rename to Shower/QTilde/Base/HardBranching.h
--- a/Shower/Core/Base/HardBranching.h
+++ b/Shower/QTilde/Base/HardBranching.h
@@ -1,363 +1,363 @@
// -*- C++ -*-
#ifndef HERWIG_HardBranching_H
#define HERWIG_HardBranching_H
//
// This is the declaration of the HardBranching class.
//
#include "ThePEG/Config/ThePEG.h"
#include "Herwig/Shower/Core/Base/ShowerProgenitor.h"
-#include "Herwig/Shower/Core/Base/ShowerTree.h"
+#include "Herwig/Shower/QTilde/Base/ShowerTree.h"
#include "Herwig/Shower/Core/Base/SudakovFormFactor.h"
#include "HardBranching.fh"
#include "HardTree.fh"
namespace Herwig {
using namespace ThePEG;
/**
* The HardBranching class is designed to contain the information needed for
* an individual branching in the POWHEG approach
*/
class HardBranching : public Base {
/**
* The HardTree is friend
*/
friend class HardTree;
public:
/**
* Enum for the status
*/
enum Status {Outgoing=0,Incoming,Decay};
public:
/**
* The default constructor
* @param particle The particle which is branching
* @param sudakov The Sudakov form factor for the branching
* @param parent The parent for the branching
* @param status Whether the particle is incoming or outgoing
*/
HardBranching(ShowerParticlePtr particle, SudakovPtr sudakov,
tHardBranchingPtr parent,Status status);
/**
* Add a child of the branching
* @param child The child of the branching
*/
void addChild(HardBranchingPtr child) {_children.push_back(child);}
/**
* Clear the children
*/
void clearChildren() { _children.clear(); }
/**
* Set the momenta of the particles
*/
void setMomenta(LorentzRotation R, double alpha, Lorentz5Momentum pt,
bool setMomentum=true);
/**
* Set and get members for the private member variables
*/
//@{
/**
* Return the branching particle.
*/
tShowerParticlePtr branchingParticle() const {return _particle;}
/**
* Set the branching particle
*/
void branchingParticle(ShowerParticlePtr in) {_particle=in;}
/**
* Get the original momentum
*/
const Lorentz5Momentum & original() const {return _original;}
/**
* Set the original momentum
*/
void original(const Lorentz5Momentum & in) {_original=in;}
/**
* Get the p reference vector
*/
const Lorentz5Momentum & pVector() const {return _p;}
/**
* Set the p reference vector
*/
void pVector(const Lorentz5Momentum & in) {_p=in;}
/**
* Get the n reference vector
*/
const Lorentz5Momentum & nVector() const {return _n;}
/**
* Set the n reference vector
*/
void nVector(const Lorentz5Momentum & in) {_n=in;}
/**
* Get the transverse momentum vector
*/
const Lorentz5Momentum & qPerp() const {return _qt;}
/**
* Set the transverse momentum vector
*/
void qPerp(const Lorentz5Momentum & in) {_qt=in;}
/**
* Get the momentum the particle should have as the start of a shower
*/
const Lorentz5Momentum & showerMomentum() const {return _shower;}
/**
* Set the momentum the particle should have as the start of a shower
*/
void showerMomentum(const Lorentz5Momentum & in ) {_shower=in;}
/**
* Get the transverse momentum
*/
Energy pT() const {return _pt;}
/**
* Set the transverse momentum
*/
void pT(Energy in) { _pt=in;}
/**
* Get the fraction of beam momentum x
*/
double x_frac() const {return _x_frac;}
/**
* Set the fraction of beam momentum x
*/
void x_frac( double x ) { _x_frac = x; }
/**
* Get whether the branching is incoming, outgoing or decay
*/
Status status() const {return _status;}
/**
* Set whether the branching is incoming, outgoing or decay
*/
void status(Status in) {_status=in;}
/**
* The parent of the branching
*/
tHardBranchingPtr parent() const {return _parent;}
/**
* Set the parent of the branching
*/
void parent(tHardBranchingPtr in) {_parent=in;}
/**
* The Sudakov form-factor
*/
SudakovPtr sudakov() const {return _sudakov;}
/**
* The Sudakov form-factor
*/
void sudakov(SudakovPtr in) {_sudakov=in;}
/**
* Get the beam particle
*/
PPtr beam() const {return _beam;}
/**
* Set the beam particle
*/
void beam(PPtr in) {_beam=in;}
/**
* The children
*/
vector<HardBranchingPtr> & children() {return _children;}
//@}
/**
* Information on the Shower variables for the branching
*/
//@{
/**
* Get the evolution scale
*/
Energy scale() const {return _scale;}
/**
* The evolution scale
*/
void scale(Energy in) {_scale=in;}
/**
* The energy fraction
*/
double z() const {return _z;}
/**
* The energy fraction
*/
void z(double in) {_z=in;}
/**
* The azimthual angle
*/
double phi() const {return _phi;}
/**
* The azimthual angle
*/
void phi(double in) {_phi=in;}
//@}
/**
* Colour partners
*/
//@{
/**
* Get the colour partner
*/
tHardBranchingPtr colourPartner() const {return _partner;}
/**
* The colour partner of the branching
*/
void colourPartner(tHardBranchingPtr in) {_partner=in;}
//@}
/**
* Type of branching
*/
ShowerPartnerType type() const {
assert(type_!=ShowerPartnerType::Undefined);
return type_;
}
/**
* Type of branching
*/
void type(ShowerPartnerType in) {
type_ = in;
assert(type_!=ShowerPartnerType::Undefined);
}
private:
/**
* The branching particle
*/
ShowerParticlePtr _particle;
/**
* The rescaled momentum
*/
Lorentz5Momentum _original;
/**
* The \f$p\f$ reference vector
*/
Lorentz5Momentum _p;
/**
* The \f$n\f$ reference vector
*/
Lorentz5Momentum _n;
/**
* The transverse momentum vector
*/
Lorentz5Momentum _qt;
/**
* The momentum the particle should have as the start of a shower
*/
Lorentz5Momentum _shower;
/**
* The transverse momentum
*/
Energy _pt;
/**
* The beam momentum fraction carried by an incoming parton x
*/
double _x_frac;
/**
* Whether the branching is incoming, outgoing or a decay
*/
Status _status;
/**
* Information on the Shower variables for the branching
*/
//@{
/**
* The evolution scale
*/
Energy _scale;
/**
* The energy fraction
*/
double _z;
/**
* The azimthual angle
*/
double _phi;
//@}
/**
* The parent of the branching
*/
tHardBranchingPtr _parent;
/**
* The Sudakov form-factor
*/
SudakovPtr _sudakov;
/**
* The children
*/
vector<HardBranchingPtr> _children;
/**
* The beam particle
*/
PPtr _beam;
/**
* The colour partner
*/
tHardBranchingPtr _partner;
/**
* The type of branching
*/
ShowerPartnerType type_;
};
}
#endif /* HERWIG_HardBranching_H */
diff --git a/Shower/Core/Base/HardTree.cc b/Shower/QTilde/Base/HardTree.cc
rename from Shower/Core/Base/HardTree.cc
rename to Shower/QTilde/Base/HardTree.cc
diff --git a/Shower/Core/Base/HardTree.fh b/Shower/QTilde/Base/HardTree.fh
rename from Shower/Core/Base/HardTree.fh
rename to Shower/QTilde/Base/HardTree.fh
diff --git a/Shower/Core/Base/HardTree.h b/Shower/QTilde/Base/HardTree.h
rename from Shower/Core/Base/HardTree.h
rename to Shower/QTilde/Base/HardTree.h
--- a/Shower/Core/Base/HardTree.h
+++ b/Shower/QTilde/Base/HardTree.h
@@ -1,143 +1,143 @@
// -*- C++ -*-
#ifndef HERWIG_HardTree_H
#define HERWIG_HardTree_H
//
// This is the declaration of the HardTree class.
//
#include "ThePEG/Config/ThePEG.h"
#include "Herwig/Shower/Core/Base/ShowerProgenitor.h"
-#include "Herwig/Shower/Core/Base/ShowerTree.h"
+#include "Herwig/Shower/QTilde/Base/ShowerTree.h"
#include "Herwig/Shower/Core/Base/SudakovFormFactor.h"
#include "Herwig/Shower/RealEmissionProcess.fh"
#include "HardBranching.h"
#include "HardTree.fh"
namespace Herwig {
using namespace ThePEG;
/**
* The HardTree class is designed to contain the information required
* to implement the POWHEG approach for Monte Carlo at next-to-leading order.
*/
class HardTree : public Base {
/**
* Output operator for testing
*/
friend ostream & operator << (ostream &, const HardTree & );
public:
/**
* The default constructor.
*/
HardTree(vector<HardBranchingPtr>, vector<HardBranchingPtr>, ShowerInteraction);
/**
* Contructor from Real emission process
*/
HardTree(RealEmissionProcessPtr real);
/**
* Match particles in the ShowerTree to branchings in the HardTree
*/
bool connect(ShowerParticlePtr particle, HardBranchingPtr branching) {
if(branchings_.find(branching)==branchings_.end()) return false;
particles_[particle]=branching;
return true;
}
/**
* Match the prticles in the ShowerTree to the branchings in the HardTree
*/
bool connect(ShowerTreePtr);
/**
* Access the map between the ShowerParticle and the HardBranching
*/
map<ShowerParticlePtr,tHardBranchingPtr> & particles()
{return particles_;}
/**
* Access the set of branchings
*/
set<HardBranchingPtr> & branchings() {return branchings_;}
/**
* Access the incoming branchings
*/
set<HardBranchingPtr> & incoming() {return spacelike_;}
/**
* Type of interaction
*/
ShowerInteraction interaction() {return interaction_;}
/**
* Get the Rotation to be applied to the tree
*/
LorentzRotation showerRot() { return showerRot_; }
/**
* Set the Rotation to be applied to the tree
*/
void showerRot( LorentzRotation r ) { showerRot_ = r; }
/**
* Whether or not the evolution partners are set
*/
bool partnersSet() const {return partnersSet_;}
/**
* Whether or not the evolution partners are set
*/
void partnersSet(bool in) {partnersSet_=in;}
private:
/**
* Type of interaction
*/
ShowerInteraction interaction_;
/**
* The ShowerTree
*/
ShowerTreePtr _tree;
/**
* Map from the particles in the ShowerTree to the HardBranchings
*/
map<ShowerParticlePtr,tHardBranchingPtr> particles_;
/**
* The HardBranchings in the hard process
*/
set<HardBranchingPtr> branchings_;
/**
* The HardBranchings which initiate the space-like showers
*/
set<HardBranchingPtr> spacelike_;
/**
* Rotation to shower frame
*/
LorentzRotation showerRot_;
/**
* Whether or not partners are set
*/
bool partnersSet_;
};
/**
* Output operator for testing
*/
ostream & operator << (ostream &, const HardTree & );
}
#endif /* HERWIG_HardTree_H */
diff --git a/Shower/QTilde/Base/KinematicsReconstructor.h b/Shower/QTilde/Base/KinematicsReconstructor.h
--- a/Shower/QTilde/Base/KinematicsReconstructor.h
+++ b/Shower/QTilde/Base/KinematicsReconstructor.h
@@ -1,132 +1,132 @@
// -*- C++ -*-
//
// KinematicsReconstructor.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_KinematicsReconstructor_H
#define HERWIG_KinematicsReconstructor_H
//
// This is the declaration of the KinematicsReconstructor class.
//
#include "ThePEG/Interface/Interfaced.h"
#include "Herwig/Shower/Core/Base/ShowerParticle.h"
#include "Herwig/Shower/Core/Base/ShowerProgenitor.h"
-#include "Herwig/Shower/Core/Base/ShowerTree.h"
-#include "Herwig/Shower/Core/Base/HardTree.h"
+#include "Herwig/Shower/QTilde/Base/ShowerTree.h"
+#include "Herwig/Shower/QTilde/Base/HardTree.h"
#include "KinematicsReconstructor.fh"
#include <cassert>
namespace Herwig {
using namespace ThePEG;
/**\ingroup Shower
* Exception class
* used to communicate failure of kinematics
* reconstruction.
*/
struct KinematicsReconstructionVeto {};
/** \ingroup Shower
*
* This class is responsible for the kinematical reconstruction
* after each showering step, and also for the necessary Lorentz boosts
* in order to preserve energy-momentum conservation in the overall collision,
* and also the invariant mass and the rapidity of the hard subprocess system.
* In the case of multi-step showering, there will be not unnecessary
* kinematical reconstructions.
*
* Notice:
* - although we often use the term "jet" in either methods or variables names,
* or in comments, which could appear applicable only for QCD showering,
* there is indeed no "dynamics" represented in this class: only kinematics
* is involved, as the name of this class remainds. Therefore it can be used
* for any kind of showers (QCD-,QED-,EWK-,... bremsstrahlung).
*
* @see \ref KinematicsReconstructorInterfaces "The interfaces"
* defined for KinematicsReconstructor.
*/
class KinematicsReconstructor: public Interfaced {
public:
/**
* Methods to reconstruct the kinematics of a scattering or decay process
*/
//@{
/**
* Given the ShowerTree for the shower from a hard process
* the method does the reconstruction of the jets,
* including the appropriate boosts (kinematics reshufflings)
* needed to conserve the total energy-momentum of the collision
* and preserving the invariant mass and the rapidity of the
* hard subprocess system.
*/
virtual bool reconstructHardJets(ShowerTreePtr hard,
const map<tShowerProgenitorPtr,
pair<Energy,double> > & pt,
ShowerInteraction type,
bool switchRecon) const=0;
/**
* Given the ShowerTree for a decay shower
* the method does the reconstruction of the jets,
* including the appropriate boosts (kinematics reshufflings)
* needed to conserve the total energy-momentum of the collision
* and preserving the invariant mass and the rapidity of the
* hard subprocess system.
*/
virtual bool reconstructDecayJets(ShowerTreePtr decay,
ShowerInteraction type) const=0;
//@}
/**
* Methods to invert the reconstruction of the shower for
* a scattering or decay process and calculate
* the variables used to generate the
* shower given the particles produced.
* This is needed for the CKKW and POWHEG approaches
*/
//@{
/**
* Given the particles, with a history which we wish to interpret
* as a shower reconstruct the variables used to generate the
* shower for a decay process
*/
virtual bool deconstructDecayJets(HardTreePtr decay,ShowerInteraction) const=0;
/**
* Given the particles, with a history which we wish to interpret
* as a shower reconstruct the variables used to generate the shower
* for a hard process
*/
virtual bool deconstructHardJets(HardTreePtr hard,ShowerInteraction) const=0;
//@}
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();
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
KinematicsReconstructor & operator=(const KinematicsReconstructor &);
};
}
#endif /* HERWIG_KinematicsReconstructor_H */
diff --git a/Shower/Core/Base/ShowerTree.cc b/Shower/QTilde/Base/ShowerTree.cc
rename from Shower/Core/Base/ShowerTree.cc
rename to Shower/QTilde/Base/ShowerTree.cc
--- a/Shower/Core/Base/ShowerTree.cc
+++ b/Shower/QTilde/Base/ShowerTree.cc
@@ -1,923 +1,922 @@
// -*- C++ -*-
//
// ShowerTree.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
-#include "ShowerProgenitor.h"
#include "ThePEG/EventRecord/MultiColour.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ShowerTree.h"
#include "Herwig/Shower/Core/Base/ShowerParticle.h"
#include "Herwig/Shower/ShowerHandler.h"
#include "ThePEG/PDT/DecayMode.h"
#include "ThePEG/Handlers/EventHandler.h"
#include "ThePEG/Handlers/XComb.h"
#include <cassert>
#include "ThePEG/Repository/CurrentGenerator.h"
#include "ThePEG/PDT/StandardMatchers.h"
using namespace Herwig;
using namespace ThePEG;
bool ShowerTree::_spaceTime = false;
Energy2 ShowerTree::_vmin2 = 0.1*GeV2;
namespace {
void findBeam(tPPtr & beam, PPtr incoming) {
while(!beam->children().empty()) {
bool found=false;
for(unsigned int ix=0;ix<beam->children().size();++ix) {
if(beam->children()[ix]==incoming) {
found = true;
break;
}
}
if(found) break;
beam = beam->children()[0];
}
}
}
ShowerTree::ShowerTree(PerturbativeProcessPtr process)
: _hardMECorrection(false),
_parent(), _hasShowered(false) {
// get the incoming and outgoing particles and make copies
vector<PPtr> original,copy;
for(unsigned int ix=0;ix<process->incoming().size();++ix) {
original.push_back(process->incoming()[ix].first);
copy .push_back(new_ptr(Particle(*original.back())));
}
for(unsigned int ix=0;ix<process->outgoing().size();++ix) {
original.push_back(process->outgoing()[ix].first);
copy .push_back(new_ptr(Particle(*original.back())));
}
// isolate the colour
colourIsolate(original,copy);
// hard process
unsigned int itype(1);
if(process->incoming().size()==2) {
_wasHard = true;
// set the beams and incoming particles
tPPair beam = CurrentGenerator::current().currentEvent()->incoming();
findBeam(beam.first ,process->incoming()[0].first);
findBeam(beam.second,process->incoming()[1].first);
_incoming = make_pair(process->incoming()[0].first,
process->incoming()[1].first);
double x1(_incoming.first ->momentum().rho()/beam.first ->momentum().rho());
double x2(_incoming.second->momentum().rho()/beam.second->momentum().rho());
// must have two incoming particles
assert(_incoming.first && _incoming.second);
// set the parent tree
_parent=ShowerTreePtr();
for(unsigned int ix=0;ix<2;++ix) {
ShowerParticlePtr temp=new_ptr(ShowerParticle(*copy[ix],itype,false));
fixColour(temp);
temp->x(ix==0 ? x1 : x2);
_incomingLines.insert(make_pair(new_ptr(ShowerProgenitor(original[ix],
copy[ix],temp)),temp));
_backward.insert(temp);
}
}
// decay process
else if(process->incoming().size()==1) {
_wasHard = false;
itype=2;
// create the parent shower particle
ShowerParticlePtr sparent(new_ptr(ShowerParticle(*copy[0],itype,false)));
fixColour(sparent);
_incomingLines.insert(make_pair(new_ptr(ShowerProgenitor(original[0],copy[0],sparent))
,sparent));
// return if not decayed
if(original.size()==1) return;
}
else
assert(false);
// create the children
assert(copy.size() == original.size());
for (unsigned int ix=process->incoming().size();ix<original.size();++ix) {
ShowerParticlePtr stemp= new_ptr(ShowerParticle(*copy[ix],itype,true));
fixColour(stemp);
_outgoingLines.insert(make_pair(new_ptr(ShowerProgenitor(original[ix],copy[ix],
stemp)),
stemp));
_forward.insert(stemp);
}
}
void ShowerTree::updateFinalStateShowerProduct(ShowerProgenitorPtr progenitor,
ShowerParticlePtr parent,
const ShowerParticleVector & children) {
assert(children.size()==2);
bool matches[2];
for(unsigned int ix=0;ix<2;++ix) {
matches[ix] = children[ix]->id()==progenitor->id();
}
ShowerParticlePtr newpart;
if(matches[0]&&matches[1]) {
if(parent->showerKinematics()->z()>0.5) newpart=children[0];
else newpart=children[1];
}
else if(matches[0]) newpart=children[0];
else if(matches[1]) newpart=children[1];
_outgoingLines[progenitor]=newpart;
}
void ShowerTree::updateInitialStateShowerProduct(ShowerProgenitorPtr progenitor,
ShowerParticlePtr newParent) {
_incomingLines[progenitor]=newParent;
}
void ShowerTree::insertHard(StepPtr pstep, bool ISR, bool) {
assert(_incomingLines.size()==2);
colourLines().clear();
map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator cit;
// construct the map of colour lines for hard process
for(cit=_incomingLines.begin();cit!=_incomingLines.end();++cit) {
if(!cit->first->perturbative()) continue;
mapColour(cit->first->original(),cit->first->copy());
}
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator cjt;
for(cjt=_outgoingLines.begin();cjt!=_outgoingLines.end();++cjt) {
if(!cjt->first->perturbative()) continue;
mapColour(cjt->first->original(),cjt->first->copy());
}
// initial-state radiation
if(ISR) {
for(cit=incomingLines().begin();cit!=incomingLines().end();++cit) {
ShowerParticlePtr init=(*cit).first->progenitor();
assert(init->thePEGBase());
PPtr original = (*cit).first->original();
if(original->parents().empty()) continue;
PPtr hadron= original->parents()[0];
assert(!original->children().empty());
PPtr copy=cit->first->copy();
ParticleVector intermediates=original->children();
for(unsigned int ix=0;ix<intermediates.size();++ix) {
init->abandonChild(intermediates[ix]);
copy->abandonChild(intermediates[ix]);
}
// if not from a matrix element correction
if(cit->first->perturbative()) {
// break mother/daugther relations
init->addChild(original);
hadron->abandonChild(original);
// if particle showers add shower
if(cit->first->hasEmitted()) {
addInitialStateShower(init,hadron,pstep,false);
}
// no showering for this particle
else {
updateColour(init,false);
hadron->addChild(init);
pstep->addIntermediate(init);
init->setLifeLength(Lorentz5Distance());
init->setVertex(LorentzPoint());
}
}
// from matrix element correction
else {
// break mother/daugther relations
hadron->abandonChild(original);
copy->addChild(original);
updateColour(copy,false);
init->addChild(copy);
pstep->addIntermediate(copy);
copy->setLifeLength(Lorentz5Distance());
copy->setVertex(LorentzPoint());
// if particle showers add shower
if(cit->first->hasEmitted()) {
addInitialStateShower(init,hadron,pstep,false);
}
// no showering for this particle
else {
updateColour(init,false);
hadron->addChild(init);
pstep->addIntermediate(init);
init->setLifeLength(Lorentz5Distance());
init->setVertex(LorentzPoint());
}
}
}
}
else {
for(cit=incomingLines().begin();cit!=incomingLines().end();++cit) {
ShowerParticlePtr init=(*cit).first->progenitor();
assert(init->thePEGBase());
PPtr original = (*cit).first->original();
if(original->parents().empty()) continue;
PPtr hadron= original->parents()[0];
assert(!original->children().empty());
PPtr copy=cit->first->copy();
ParticleVector intermediates=original->children();
for(unsigned int ix=0;ix<intermediates.size();++ix) {
init->abandonChild(intermediates[ix]);
copy->abandonChild(intermediates[ix]);
}
// break mother/daugther relations
init->addChild(original);
hadron->abandonChild(original);
// no showering for this particle
updateColour(init,false);
hadron->addChild(init);
pstep->addIntermediate(init);
init->setLifeLength(Lorentz5Distance());
init->setVertex(LorentzPoint());
original->setLifeLength(Lorentz5Distance());
original->setVertex(LorentzPoint());
}
}
// final-state radiation
for(cjt=outgoingLines().begin();cjt!=outgoingLines().end();++cjt) {
ShowerParticlePtr init=(*cjt).first->progenitor();
assert(init->thePEGBase());
// ZERO the distance of original
(*cjt).first->original()->setLifeLength(Lorentz5Distance());
(*cjt).first->original()->setVertex(LorentzPoint());
// if not from a matrix element correction
if(cjt->first->perturbative()) {
// register the shower particle as a
// copy of the one from the hard process
tParticleVector parents=init->parents();
for(unsigned int ix=0;ix<parents.size();++ix)
parents[ix]->abandonChild(init);
(*cjt).first->original()->addChild(init);
pstep->addDecayProduct(init);
}
// from a matrix element correction
else {
if(cjt->first->original()==_incoming.first||
cjt->first->original()==_incoming.second) {
updateColour((*cjt).first->copy(),false);
(*cjt).first->original()->parents()[0]->
addChild((*cjt).first->copy());
pstep->addDecayProduct((*cjt).first->copy());
(*cjt).first->copy()->addChild(init);
pstep->addDecayProduct(init);
}
else {
updateColour((*cjt).first->copy(),false);
(*cjt).first->original()->addChild((*cjt).first->copy());
pstep->addDecayProduct((*cjt).first->copy());
(*cjt).first->copy()->addChild(init);
pstep->addDecayProduct(init);
}
// ZERO the distance of copy ??? \todo change if add space-time
(*cjt).first->copy()->setLifeLength(Lorentz5Distance());
(*cjt).first->copy()->setVertex(LorentzPoint());
}
// copy so travels no distance
init->setLifeLength(Lorentz5Distance());
init->setVertex(init->parents()[0]->decayVertex());
// sort out the colour
updateColour(init,false);
// insert shower products
addFinalStateShower(init,pstep);
}
colourLines().clear();
}
void ShowerTree::addFinalStateShower(PPtr p, StepPtr s) {
// if endpoint assume doesn't travel
if(p->children().empty()) {
if(p->dataPtr()->stable()||ShowerHandler::currentHandler()->decaysInShower(p->id()))
p->setLifeLength(Lorentz5Distance());
else {
Length ctau = p->dataPtr()->generateLifeTime(p->mass(), p->dataPtr()->width());
Lorentz5Distance lifeLength(ctau,p->momentum().vect()*(ctau/p->mass()));
p->setLifeLength(lifeLength);
}
return;
}
// set the space-time distance
else {
p->setLifeLength(spaceTimeDistance(p));
}
ParticleVector::const_iterator child;
for(child=p->children().begin(); child != p->children().end(); ++child) {
updateColour(*child,false);
s->addDecayProduct(*child);
(**child).setVertex(p->decayVertex());
addFinalStateShower(*child,s);
}
}
void ShowerTree::addInitialStateShower(PPtr p, PPtr hadron,
StepPtr s, bool addchildren) {
// Each parton here should only have one parent
if(!p->parents().empty()) {
if(p->parents().size()!=1)
throw Exception() << "Particle must only have one parent in ShowerTree"
<< "::addInitialStateShower" << Exception::runerror;
// set the space-time distances
if(addchildren) {
p->setLifeLength(spaceTimeDistance(p));
p->setVertex(p->children()[0]->vertex()-p->lifeLength());
}
else {
p->setLifeLength(spaceTimeDistance(p));
p->setVertex(-p->lifeLength());
}
// recurse
addInitialStateShower(p->parents()[0],hadron,s);
}
else {
hadron->addChild(p);
s->addIntermediate(p);
p->setVertex(p->children()[0]->vertex());
p->setLifeLength(Lorentz5Distance());
}
updateColour(p,false);
// if not adding children return
if(!addchildren) return;
// add children
ParticleVector::const_iterator child;
for(child = p->children().begin(); child != p->children().end(); ++child) {
// if a final-state particle update the colour
ShowerParticlePtr schild =
dynamic_ptr_cast<ShowerParticlePtr>(*child);
(**child).setVertex(p->decayVertex());
if(schild && schild->isFinalState()) updateColour(*child,false);
// if there are grandchildren of p
if(!(*child)->children().empty()) {
// Add child as intermediate
s->addIntermediate(*child);
// If child is shower particle and final-state, add children
if(schild && schild->isFinalState()) addFinalStateShower(schild,s);
}
else
s->addDecayProduct(*child);
}
}
void ShowerTree::update(PerturbativeProcessPtr newProcess) {
// must be one incoming particle
assert(_incomingLines.size()==1);
colourLines().clear();
// copy the particles and isolate the colour
vector<PPtr> original,copy;
for(unsigned int ix=0;ix<newProcess->incoming().size();++ix) {
original.push_back(newProcess->incoming()[ix].first);
copy .push_back(new_ptr(Particle(*original.back())));
}
for(unsigned int ix=0;ix<newProcess->outgoing().size();++ix) {
original.push_back(newProcess->outgoing()[ix].first);
copy .push_back(new_ptr(Particle(*original.back())));
}
// isolate the colour
colourIsolate(original,copy);
// make the new progenitor
ShowerParticlePtr stemp=new_ptr(ShowerParticle(*copy[0],2,false));
fixColour(stemp);
ShowerProgenitorPtr newprog=new_ptr(ShowerProgenitor(original[0],copy[0],stemp));
_incomingLines.clear();
_incomingLines.insert(make_pair(newprog,stemp));
// create the children
assert(copy.size() == original.size());
for (unsigned int ix=newProcess->incoming().size();ix<original.size();++ix) {
ShowerParticlePtr stemp= new_ptr(ShowerParticle(*copy[ix],2,true));
fixColour(stemp);
_outgoingLines.insert(make_pair(new_ptr(ShowerProgenitor(original[ix],copy[ix],
stemp)),
stemp));
_forward.insert(stemp);
}
}
void ShowerTree::insertDecay(StepPtr pstep,bool ISR, bool) {
assert(_incomingLines.size()==1);
colourLines().clear();
// find final particle from previous tree
PPtr final;
if(_parent&&!_parent->_treelinks.empty())
final = _parent->_treelinks[this].second;
else
final=_incomingLines.begin()->first->original();
// construct the map of colour lines
PPtr copy=_incomingLines.begin()->first->copy();
mapColour(final,copy);
// now this is the ONE instance of the particle which should have a life length
// \todo change if space-time picture added
// set the lifelength, need this so that still in right direction after
// any ISR recoils
Length ctau = copy->lifeTime();
Lorentz5Distance lifeLength(ctau,final->momentum().vect()*(ctau/final->mass()));
final->setLifeLength(lifeLength);
// initial-state radiation
if(ISR&&!_incomingLines.begin()->first->progenitor()->children().empty()) {
ShowerParticlePtr init=_incomingLines.begin()->first->progenitor();
updateColour(init,false);
final->addChild(init);
pstep->addDecayProduct(init);
// just a copy doesn't travel
init->setLifeLength(Lorentz5Distance());
init->setVertex(final->decayVertex());
// insert shower products
addFinalStateShower(init,pstep);
// sort out colour
final=_incomingLines.begin()->second;
colourLines().clear();
mapColour(final,copy);
}
// get the decaying particles
// make the copy
tColinePair cline=make_pair(copy->colourLine(),copy->antiColourLine());
updateColour(copy,false);
// sort out sinks and sources if needed
if(cline.first) {
if(cline.first->sourceNeighbours().first) {
copy->colourLine()->setSourceNeighbours(cline.first->sourceNeighbours().first,
cline.first->sourceNeighbours().second);
}
else if (cline.first->sinkNeighbours().first) {
copy->colourLine()->setSinkNeighbours(cline.first->sinkNeighbours().first,
cline.first->sinkNeighbours().second);
}
}
if(cline.second) {
if(cline.second->sourceNeighbours().first) {
copy->antiColourLine()->setSourceNeighbours(cline.second->sourceNeighbours().first,
cline.second->sourceNeighbours().second);
}
else if (cline.second->sinkNeighbours().first) {
copy->antiColourLine()->setSinkNeighbours(cline.second->sinkNeighbours().first,
cline.second->sinkNeighbours().second);
}
}
// copy of the one from the hard process
tParticleVector dpar=copy->parents();
for(unsigned int ix=0;ix<dpar.size();++ix) dpar[ix]->abandonChild(copy);
final->addChild(copy);
pstep->addDecayProduct(copy);
// just a copy does not move
copy->setLifeLength(Lorentz5Distance());
copy->setVertex(final->decayVertex());
// final-state radiation
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator cit;
for(cit=outgoingLines().begin();cit!=outgoingLines().end();++cit) {
ShowerParticlePtr init=cit->first->progenitor();
// ZERO the distance
init->setLifeLength(Lorentz5Distance());
if(!init->thePEGBase())
throw Exception() << "Final-state particle must have a ThePEGBase"
<< " in ShowerTree::insertDecay()"
<< Exception::runerror;
// if not from matrix element correction
if(cit->first->perturbative()) {
// add the child
updateColour(cit->first->copy(),false);
PPtr orig=cit->first->original();
orig->setLifeLength(Lorentz5Distance());
orig->setVertex(copy->decayVertex());
copy->addChild(orig);
pstep->addDecayProduct(orig);
orig->addChild(cit->first->copy());
pstep->addDecayProduct(cit->first->copy());
// register the shower particle as a
// copy of the one from the hard process
tParticleVector parents=init->parents();
for(unsigned int ix=0;ix<parents.size();++ix)
{parents[ix]->abandonChild(init);}
(*cit).first->copy()->addChild(init);
pstep->addDecayProduct(init);
updateColour(init,false);
}
// from a matrix element correction
else {
if(copy->children().end()==
find(copy->children().begin(),copy->children().end(),
cit->first->original())) {
updateColour(cit->first->original(),false);
copy->addChild(cit->first->original());
pstep->addDecayProduct(cit->first->original());
}
updateColour(cit->first->copy(),false);
cit->first->original()->addChild(cit->first->copy());
pstep->addDecayProduct(cit->first->copy());
// register the shower particle as a
// copy of the one from the hard process
tParticleVector parents=init->parents();
for(unsigned int ix=0;ix<parents.size();++ix)
{parents[ix]->abandonChild(init);}
(*cit).first->copy()->addChild(init);
pstep->addDecayProduct(init);
updateColour(init,false);
}
// ZERO the distances as just copies
cit->first->copy()->setLifeLength(Lorentz5Distance());
init->setLifeLength(Lorentz5Distance());
cit->first->copy()->setVertex(copy->decayVertex());
init->setVertex(copy->decayVertex());
// insert shower products
addFinalStateShower(init,pstep);
}
colourLines().clear();
}
void ShowerTree::clear() {
// reset the has showered flag
_hasShowered=false;
// clear the colour map
colourLines().clear();
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator cit;
map<ShowerProgenitorPtr, ShowerParticlePtr>::const_iterator cjt;
// abandon the children of the outgoing particles
for(cit=_outgoingLines.begin();cit!=_outgoingLines.end();++cit) {
ShowerParticlePtr orig=cit->first->progenitor();
orig->set5Momentum(cit->first->copy()->momentum());
ParticleVector children=orig->children();
for(unsigned int ix=0;ix<children.size();++ix) orig->abandonChild(children[ix]);
_outgoingLines[cit->first]=orig;
cit->first->hasEmitted(false);
cit->first->reconstructed(ShowerProgenitor::notReconstructed);
}
// forward products
_forward.clear();
for(cit=_outgoingLines.begin();cit!=_outgoingLines.end();++cit)
_forward.insert(cit->first->progenitor());
// if a decay
if(!_wasHard) {
ShowerParticlePtr orig=_incomingLines.begin()->first->progenitor();
orig->set5Momentum(_incomingLines.begin()->first->copy()->momentum());
ParticleVector children=orig->children();
for(unsigned int ix=0;ix<children.size();++ix) orig->abandonChild(children[ix]);
_incomingLines.begin()->first->reconstructed(ShowerProgenitor::notReconstructed);
}
// if a hard process
else {
for(cjt=_incomingLines.begin();cjt!=_incomingLines.end();++cjt) {
tPPtr parent = cjt->first->original()->parents().empty() ?
tPPtr() : cjt->first->original()->parents()[0];
ShowerParticlePtr temp=
new_ptr(ShowerParticle(*cjt->first->copy(),
cjt->first->progenitor()->perturbative(),
cjt->first->progenitor()->isFinalState()));
fixColour(temp);
temp->x(cjt->first->progenitor()->x());
cjt->first->hasEmitted(false);
if(!(cjt->first->progenitor()==cjt->second)&&cjt->second&&parent)
parent->abandonChild(cjt->second);
cjt->first->progenitor(temp);
_incomingLines[cjt->first]=temp;
cjt->first->reconstructed(ShowerProgenitor::notReconstructed);
}
}
// reset the particles at the end of the shower
_backward.clear();
// if hard process backward products
if(_wasHard)
for(cjt=_incomingLines.begin();cjt!=_incomingLines.end();++cjt)
_backward.insert(cjt->first->progenitor());
clearTransforms();
}
void ShowerTree::resetShowerProducts() {
map<ShowerProgenitorPtr, ShowerParticlePtr>::const_iterator cit;
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator cjt;
_backward.clear();
_forward.clear();
for(cit=_incomingLines.begin();cit!=_incomingLines.end();++cit)
_backward.insert(cit->second);
for(cjt=_outgoingLines.begin();cjt!=_outgoingLines.end();++cjt)
_forward.insert(cjt->second);
}
void ShowerTree::updateAfterShower(ShowerDecayMap & decay) {
// update the links
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator mit;
map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::iterator tit;
for(tit=_treelinks.begin();tit!=_treelinks.end();++tit) {
if(tit->second.first) {
mit=_outgoingLines.find(tit->second.first);
if(mit!=_outgoingLines.end()) tit->second.second=mit->second;
}
}
// get the particles coming from those in the hard process
set<tShowerParticlePtr> hard;
for(mit=_outgoingLines.begin();mit!=_outgoingLines.end();++mit)
hard.insert(mit->second);
// find the shower particles which should be decayed in the
// shower but didn't come from the hard process
set<tShowerParticlePtr>::const_iterator cit;
for(cit=_forward.begin();cit!=_forward.end();++cit) {
if((ShowerHandler::currentHandler()->decaysInShower((**cit).id())&&
!(**cit).dataPtr()->stable()) &&
hard.find(*cit)==hard.end()) {
PerturbativeProcessPtr newProcess(new_ptr(PerturbativeProcess()));
newProcess->incoming().push_back(make_pair(*cit,PerturbativeProcessPtr()));
ShowerTreePtr newtree=new_ptr(ShowerTree(newProcess));
newtree->setParents();
newtree->_parent=this;
Energy width=(**cit).dataPtr()->generateWidth((**cit).mass());
decay.insert(make_pair(width,newtree));
_treelinks.insert(make_pair(newtree,
make_pair(tShowerProgenitorPtr(),*cit)));
}
}
}
void ShowerTree::addFinalStateBranching(ShowerParticlePtr parent,
const ShowerParticleVector & children) {
assert(children.size()==2);
_forward.erase(parent);
for(unsigned int ix=0; ix<children.size(); ++ix) {
_forward.insert(children[ix]);
}
}
void ShowerTree::addInitialStateBranching(ShowerParticlePtr oldParent,
ShowerParticlePtr newParent,
ShowerParticlePtr otherChild) {
_backward.erase(oldParent);
_backward.insert(newParent);
_forward.insert(otherChild);
}
void ShowerTree::setParents() {
// set the parent tree of the children
map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator tit;
for(tit=_treelinks.begin();tit!=_treelinks.end();++tit)
tit->first->_parent=this;
}
vector<ShowerProgenitorPtr> ShowerTree::extractProgenitors() {
// extract the particles from the ShowerTree
map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator mit;
vector<ShowerProgenitorPtr> ShowerHardJets;
for(mit=incomingLines().begin();mit!=incomingLines().end();++mit)
ShowerHardJets.push_back((*mit).first);
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator mjt;
for(mjt=outgoingLines().begin();mjt!=outgoingLines().end();++mjt)
ShowerHardJets.push_back((*mjt).first);
return ShowerHardJets;
}
void ShowerTree::transform(const LorentzRotation & boost, bool applyNow) {
if(applyNow) {
// now boost all the particles
map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator cit;
// incoming
for(cit=_incomingLines.begin();cit!=_incomingLines.end();++cit) {
cit->first->progenitor()->deepTransform(boost);
cit->first->copy()->deepTransform(boost);
}
// outgoing
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator cjt;
for(cjt=_outgoingLines.begin();cjt!=_outgoingLines.end();++cjt) {
cjt->first->progenitor()->deepTransform(boost);
cjt->first->copy()->deepTransform(boost);
}
}
else {
_transforms.transform(boost);
}
// child trees
for(map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator
tit=_treelinks.begin();tit!=_treelinks.end();++tit)
tit->first->transform(boost,applyNow);
}
void ShowerTree::applyTransforms() {
// now boost all the particles
map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator cit;
// incoming
for(cit=_incomingLines.begin();cit!=_incomingLines.end();++cit) {
cit->first->progenitor()->deepTransform(_transforms);
cit->first->copy()->deepTransform(_transforms);
}
// outgoing
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator cjt;
for(cjt=_outgoingLines.begin();cjt!=_outgoingLines.end();++cjt) {
cjt->first->progenitor()->deepTransform(_transforms);
cjt->first->copy()->deepTransform(_transforms);
}
// child trees
for(map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator
tit=_treelinks.begin();tit!=_treelinks.end();++tit)
tit->first->applyTransforms();
_transforms = LorentzRotation();
}
void ShowerTree::clearTransforms() {
_transforms = LorentzRotation();
// // child trees
// for(map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator
// tit=_treelinks.begin();tit!=_treelinks.end();++tit)
// tit->first->clearTransforms();
}
void ShowerTree::fixColour(tShowerParticlePtr part) {
if(!part->colourInfo()->colourLines().empty()) {
if(part->colourInfo()->colourLines().size()==1) {
ColinePtr line=part->colourLine();
if(line) {
line->removeColoured(part);
line->addColoured(part);
}
}
else {
Ptr<MultiColour>::pointer colour =
dynamic_ptr_cast<Ptr<MultiColour>::pointer>(part->colourInfo());
vector<tcColinePtr> lines = colour->colourLines();
for(unsigned int ix=0;ix<lines.size();++ix) {
ColinePtr line = const_ptr_cast<ColinePtr>(lines[ix]);
if(line) {
line->removeColoured(part);
line->addColoured(part);
}
}
}
}
if(!part->colourInfo()->antiColourLines().empty()) {
if(part->colourInfo()->antiColourLines().size()==1) {
ColinePtr line=part->antiColourLine();
if(line) {
line->removeAntiColoured(part);
line->addAntiColoured(part);
}
}
else {
Ptr<MultiColour>::pointer colour =
dynamic_ptr_cast<Ptr<MultiColour>::pointer>(part->colourInfo());
vector<tcColinePtr> lines = colour->antiColourLines();
for(unsigned int ix=0;ix<lines.size();++ix) {
ColinePtr line = const_ptr_cast<ColinePtr>(lines[ix]);
if(line) {
line->removeAntiColoured(part);
line->addAntiColoured(part);
}
}
}
}
}
vector<ShowerParticlePtr> ShowerTree::extractProgenitorParticles() {
vector<ShowerParticlePtr> particles;
// incoming particles
for(map<ShowerProgenitorPtr, ShowerParticlePtr>::const_iterator
cit=incomingLines().begin(); cit!=incomingLines().end();++cit)
particles.push_back(cit->first->progenitor());
// outgoing particles
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
cjt=outgoingLines().begin(); cjt!=outgoingLines().end();++cjt)
particles.push_back(cjt->first->progenitor());
return particles;
}
Lorentz5Distance ShowerTree::spaceTimeDistance(tPPtr particle) {
if(!_spaceTime) return Lorentz5Distance();
Energy2 q2 = particle->mass() > ZERO ? sqr(particle->mass()) : -sqr(particle->mass());
const tcPDPtr data = particle->dataPtr();
// calculate width imposing min value
Energy conMass = max(data->constituentMass(),200*MeV);
Energy width = max(data->generateWidth(particle->mass()),_vmin2/conMass);
// offshellness
Energy2 offShell = q2-sqr(data->constituentMass());
if(abs(offShell)<1e-10*GeV2) offShell = ZERO;
InvEnergy2 fact = UseRandom::rndExp(1./sqrt((sqr(offShell)+sqr(q2*width/conMass))));
Lorentz5Distance output = (hbarc*fact)*particle->momentum();
return output;
}
void ShowerTree::constructTrees(ShowerTreePtr & hardTree,
ShowerDecayMap & decayTrees,
PerturbativeProcessPtr hard,
DecayProcessMap decay) {
map<PerturbativeProcessPtr,ShowerTreePtr> treeMap;
// convert the hard process
if(hardTree) {
hardTree->update(hard);
}
else {
hardTree = new_ptr(ShowerTree(hard));
}
treeMap.insert(make_pair(hard,hardTree));
for(DecayProcessMap::const_iterator it=decay.begin();it!=decay.end();++it) {
ShowerTreePtr newTree = new_ptr(ShowerTree(it->second));
treeMap.insert(make_pair(it->second,newTree));
decayTrees.insert(make_pair(it->first,newTree));
}
// set up the links between the trees
for(map<PerturbativeProcessPtr,ShowerTreePtr>::const_iterator it=treeMap.begin();
it!=treeMap.end();++it) {
// links to daughter trees
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator mit;
for(mit=it->second->_outgoingLines.begin();
mit!=it->second->_outgoingLines.end();++mit) {
unsigned int iloc=0;
for(;iloc<it->first->outgoing().size();++iloc) {
if(it->first->outgoing()[iloc].first==mit->first->original())
break;
}
if(it->first->outgoing()[iloc].second)
it->second->_treelinks.insert(make_pair(treeMap[it->first->outgoing()[iloc].second],
make_pair(mit->first,mit->first->progenitor())));
}
// links to parent trees
if(it->first->incoming()[0].second) {
it->second->_parent = treeMap[it->first->incoming()[0].second];
}
}
}
namespace {
Lorentz5Momentum sumMomenta(tPPtr particle) {
if(particle->children().empty())
return particle->momentum();
Lorentz5Momentum output;
for(unsigned int ix=0;ix<particle->children().size();++ix) {
output += sumMomenta(particle->children()[ix]);
}
return output;
}
}
void ShowerTree::checkMomenta() {
vector<Lorentz5Momentum> pin;
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator it=_incomingLines.begin();
it!=_incomingLines.end();++it) {
if(isDecay()) {
tPPtr parent = it->first->progenitor();
pin.push_back(parent->momentum());
while(!parent->children().empty()) {
pin.back() -= sumMomenta(parent->children()[1]);
parent = parent->children()[0];
}
}
else {
tPPtr parent = it->second;
pin.push_back(parent->momentum());
while(!parent->children().empty()&&parent->children().size()==2) {
pin.back() -= sumMomenta(parent->children()[1]);
parent = parent->children()[0];
if(parent==it->first->progenitor()) break;
}
}
}
vector<Lorentz5Momentum> pout;
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator it= _outgoingLines.begin();
it!=_outgoingLines.end();++it) {
pout.push_back(sumMomenta(it->first->progenitor()));
}
Lorentz5Momentum psum;
for(unsigned int ix=0;ix< pin.size();++ix) {
CurrentGenerator::log() << "pin " << ix << pin[ix]/GeV << "\n";
psum +=pin[ix];
}
CurrentGenerator::log() << "In total " << psum/GeV << " " << psum.m()/GeV << "\n";
Lorentz5Momentum psum2;
for(unsigned int ix=0;ix< pout.size();++ix) {
CurrentGenerator::log() << "pout " << ix << pout[ix]/GeV << "\n";
psum2 +=pout[ix];
}
CurrentGenerator::log() << "Out total " << psum2/GeV << " " << psum2.m()/GeV << "\n";
CurrentGenerator::log() << "Total " << (psum-psum2)/GeV << "\n";
}
RealEmissionProcessPtr ShowerTree::perturbativeProcess() {
RealEmissionProcessPtr output(new_ptr(RealEmissionProcess()));
// add the incoming particles
unsigned int ix=0;
pair<double,double> x;
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator it=_incomingLines.begin();
it!=_incomingLines.end();++it) {
output->bornIncoming().push_back(it->first->progenitor());
if(!it->first->original()->parents().empty())
output->hadrons().push_back(it->first->original()->parents()[0]);
else
output->hadrons().push_back(it->first->progenitor());
if(ix==0) x.first = it->second->x();
else x.second = it->second->x();
++ix;
}
output->x(x);
// add the outgoing particles
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator it= _outgoingLines.begin();
it!=_outgoingLines.end();++it) {
output->bornOutgoing().push_back(it->first->progenitor());
}
return output;
}
void ShowerTree::setVetoes(const map<ShowerInteraction,Energy> & pTs,
unsigned int type) {
if(type==1||type==3) {
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator it=_incomingLines.begin();
it!=_incomingLines.end();++it) {
for(map<ShowerInteraction,Energy>::const_iterator jt=pTs.begin();jt!=pTs.end();++jt)
it->first->maximumpT(jt->second,jt->first);
}
}
if(type==2||type==3) {
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator it= _outgoingLines.begin();
it!=_outgoingLines.end();++it) {
for(map<ShowerInteraction,Energy>::const_iterator jt=pTs.begin();jt!=pTs.end();++jt)
it->first->maximumpT(jt->second,jt->first);
}
}
}
diff --git a/Shower/Core/Base/ShowerTree.fh b/Shower/QTilde/Base/ShowerTree.fh
rename from Shower/Core/Base/ShowerTree.fh
rename to Shower/QTilde/Base/ShowerTree.fh
diff --git a/Shower/Core/Base/ShowerTree.h b/Shower/QTilde/Base/ShowerTree.h
rename from Shower/Core/Base/ShowerTree.h
rename to Shower/QTilde/Base/ShowerTree.h
--- a/Shower/Core/Base/ShowerTree.h
+++ b/Shower/QTilde/Base/ShowerTree.h
@@ -1,414 +1,414 @@
// -*- C++ -*-
//
// ShowerTree.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_ShowerTree_H
#define HERWIG_ShowerTree_H
#include "ThePEG/Config/ThePEG.h"
#include "Herwig/Shower/ShowerHandler.fh"
#include "Herwig/Shower/PerturbativeProcess.h"
#include "Herwig/Shower/RealEmissionProcess.h"
#include "Herwig/Shower/ShowerEventRecord.h"
#include "Herwig/Shower/Core/ShowerConfig.h"
#include "Herwig/Shower/Core/Base/ShowerParticle.h"
-#include "ShowerProgenitor.h"
+#include "Herwig/Shower/Core/Base/ShowerProgenitor.h"
#include "ThePEG/EventRecord/Step.h"
#include <cassert>
#include "ShowerTree.fh"
namespace Herwig {
/**
* Typedef for map of ShowerTrees for decays
*/
typedef multimap<Energy,ShowerTreePtr,std::greater<Energy> > ShowerDecayMap;
using namespace ThePEG;
/** \ingroup Shower
*
* The ShowerTree class stores the basic information needed for
* each hard interaction, either a scattering process or decay, which
* needs to be showered.
*
*/
class ShowerTree : public ShowerEventRecord {
- friend class ShowerHandler;
+ friend class QTildeShowerHandler;
public:
/**
* Constructor from a perturbative process
* @param process The perturbative process
*/
ShowerTree(PerturbativeProcessPtr process);
/**
* Calculate the space-time displacement
* @param particle The particle for which to calculate the displacement
*/
static Lorentz5Distance spaceTimeDistance(tPPtr particle);
/**
* Construct the trees from the hard process
* @param hardTree The output ShowerTree for the hard process
* @param decayTrees The output ShowerTrees for any decays.
* @param hard The output ShowerTree for the hard process
* @param decay The output ShowerTrees for any decays.
*/
static void constructTrees(ShowerTreePtr & hardTree,
ShowerDecayMap & decayTrees,
PerturbativeProcessPtr hard,
DecayProcessMap decay);
public:
/**
* Insert the tree into the event record
* @param pstep The step into which the particles should be inserted
* @param ISR Whether or not ISR is switched on
* @param FSR Whether or not FSR is switched on
*/
void fillEventRecord(StepPtr pstep,bool ISR,bool FSR) {
if(_wasHard)
insertHard (pstep,ISR,FSR);
else
insertDecay(pstep,ISR,FSR);
}
/**
* Set the parent tree to this tree for trees which come from this one.
* This needs to be run after the constructor.
*/
void setParents();
/**
* Access methods for the type of interaction
*/
//@{
/**
* Whether or not this is a scattering process
*/
bool isHard() const { return _wasHard; }
/**
* Whether or not this is a decay.
*/
bool isDecay() const { return !_wasHard; }
//@}
/**
* Flags relating to the application of the hard matrix element correction
*/
//@{
/**
* Was the hard matrix element correction applied
*/
bool hardMatrixElementCorrection() const { return _hardMECorrection; }
/**
* Set whether or not the hard matrix element correction was applied
*/
void hardMatrixElementCorrection(bool in) { _hardMECorrection=in; }
//@}
/**
* Get the incoming shower particles
*/
map<ShowerProgenitorPtr,ShowerParticlePtr> & incomingLines() {
return _incomingLines;
}
/**
* Get the outgoing shower particles
*/
map<ShowerProgenitorPtr,tShowerParticlePtr> & outgoingLines() {
return _outgoingLines;
}
/**
* Update the shower product for a final-state particle
*/
void updateFinalStateShowerProduct(ShowerProgenitorPtr progenitor,
ShowerParticlePtr parent,
const ShowerParticleVector & children);
/**
* Update the shower product for an initial-state particle
*/
void updateInitialStateShowerProduct(ShowerProgenitorPtr progenitor,
ShowerParticlePtr newParent);
/**
* Get the current final shower product for a final-state particle
*/
tShowerParticlePtr getFinalStateShowerProduct(ShowerProgenitorPtr progenitor) {
return _outgoingLines.find(progenitor)==_outgoingLines.end()
? tShowerParticlePtr() : _outgoingLines[progenitor];
}
/**
* Add a final-state branching. This method removes the parent of the branching
* from the list of particles at the end of the shower and inserts the children
* @param parent The parent for the branching
* @param children The outgoing particles in the branching
*/
void addFinalStateBranching(ShowerParticlePtr parent,
const ShowerParticleVector & children);
/**
* Add an initial-state branching. This method removes the oldParent of the
* branching and inserts the result of the backward evolution and the
* outgoing particle into the relevant lists.
* @param oldParent The particle being backward evolved
* @param newParent The initial-state particle resulting from the backward evolution
* @param otherChild The final-state particle produced in the evolution.
*/
void addInitialStateBranching(ShowerParticlePtr oldParent,
ShowerParticlePtr newParent,
ShowerParticlePtr otherChild);
// /**
// * Member called at the end of the shower of a tree to perform a number of
// * updates.
// * @param decay The map of widths and ShowerTrees for the decays so that
// * any unstable decay products can be added.
// */
void updateAfterShower(ShowerDecayMap & decay);
/**
* Access and set the flag for whether this tree has been showered
*/
//@{
/**
* Access the flag
*/
bool hasShowered() const { return _hasShowered; }
/**
* Set the flag
*/
void hasShowered(bool in) { _hasShowered=in; }
//@}
/**
* Access the parent tree
*/
ShowerTreePtr parent() const { return _parent; }
/**
* Clear all the shower products so that the event can be reshowered
* if the first attempt fail
*/
void clear();
/**
* Reset the particles resulting from the shower to those which started
* the shower
*/
void resetShowerProducts();
/**
* Set maximum Emission scales
*/
void setVetoes(const map<ShowerInteraction,Energy> & pTs,
unsigned int type);
/**
* Extract the progenitors for the reconstruction
*/
vector<ShowerProgenitorPtr> extractProgenitors();
/**
* Access to the outgoing particles
*/
const set<tShowerParticlePtr> & forwardParticles() const { return _forward; }
/**
* Map of particles in this Tree which are the initial particles in other
* trees
*/
const map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> > &
treelinks() const {return _treelinks;}
/**
* Update the link between shower particle and tree
*/
void updateLink(tShowerTreePtr tree,
pair<tShowerProgenitorPtr,tShowerParticlePtr> in) {
_treelinks[tree] = in;
}
/**
* Transform the tree
*/
void transform(const LorentzRotation & rot, bool applyNow);
/**
* Apply any postphoned transformations
*/
void applyTransforms();
/**
* Clear any postphoned transformations
*/
void clearTransforms();
/**
* Transform which needs to be applied
*/
const LorentzRotation & transform() {return _transforms;}
/**
* Get all the progenitors
*/
vector<ShowerParticlePtr> extractProgenitorParticles();
/**
* Check the momentum conservation in the tree
*/
void checkMomenta();
/**
* Update tree after the parent has been decayed.
*/
void update(PerturbativeProcessPtr newProcess);
/**
* The perturbative process
*/
RealEmissionProcessPtr perturbativeProcess();
protected:
/**
* Functions to add the shower to the event record.
*/
//@{
/**
* Insert a hard process
* @param pstep The step into which the particles should be inserted
* @param ISR Whether or not ISR is switched on
* @param FSR Whether or not FSR is switched on
*/
void insertHard(StepPtr pstep,bool ISR,bool FSR);
/**
* Insert a decay process
* @param pstep The step into which the particles should be inserted
* @param ISR Whether or not ISR is switched on
* @param FSR Whether or not FSR is switched on
*/
void insertDecay(StepPtr pstep,bool ISR,bool FSR);
/**
* Recursively add the final-state shower from the particle to the event record.
* @param particle The final-state particle
* @param step The step
*/
void addFinalStateShower(PPtr particle, StepPtr step);
/**
* Add the initial-state shwoer from the particle to the step
* @param particle The final-state particle
* @param hadron The incoming hadron
* @param step The step
* @param addchildren Add the children of the particle
*/
void addInitialStateShower(PPtr particle, PPtr hadron,
StepPtr step, bool addchildren=true);
//@}
/**
* After the creatation of a ShowerParticle make sure it is properly attached
* to its ColourLine
* @param part The particle
*/
void fixColour(tShowerParticlePtr part);
private:
/**
* Incoming partons for the hard process
*/
PPair _incoming;
/**
* The incoming ShowerParticles connected to the interaction
* as the index of a map with the particle the shower backward evolves
* them to as the value
*/
map<ShowerProgenitorPtr,ShowerParticlePtr> _incomingLines;
/**
* The outgoing ShowerParticles connected to the interaction
* as the index of a map with the particle the shower
* evolves them to as the value
*/
map<ShowerProgenitorPtr,tShowerParticlePtr> _outgoingLines;
/**
* The outgoing ShowerParticles at the end of the final-state shower
*/
set<tShowerParticlePtr> _forward;
/**
* The incoming ShowerParticles at the end of the initial-state shower
*/
set<tShowerParticlePtr> _backward;
/**
* Was the hard matrix element correction applied
*/
bool _hardMECorrection;
/**
* Was this a scattering process or a decay
*/
bool _wasHard;
/**
* Map of particles in this Tree which are the initial particles in other
* trees
*/
map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> > _treelinks;
/**
* The parent tree
*/
tShowerTreePtr _parent;
/**
* Has this tree showered
*/
bool _hasShowered;
/**
* The transforms which still need to be applied
*/
LorentzRotation _transforms;
private:
/**
* Whether or not to include space-time distances
*/
static bool _spaceTime;
/**
* Minimum virtuality for the space-time model
*/
static Energy2 _vmin2;
};
}
#endif
diff --git a/Shower/QTilde/Base/ShowerVeto.h b/Shower/QTilde/Base/ShowerVeto.h
--- a/Shower/QTilde/Base/ShowerVeto.h
+++ b/Shower/QTilde/Base/ShowerVeto.h
@@ -1,139 +1,139 @@
// -*- C++ -*-
//
// ShowerVeto.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_ShowerVeto_H
#define HERWIG_ShowerVeto_H
//
// This is the declaration of the ShowerVeto class.
//
#include "ThePEG/Interface/Interfaced.h"
#include "ShowerVeto.fh"
#include "Herwig/Shower/Core/ShowerConfig.h"
#include "Herwig/Shower/Core/Base/ShowerParticle.fh"
#include "Herwig/Shower/Core/Base/ShowerProgenitor.fh"
-#include "Herwig/Shower/Core/Base/ShowerTree.fh"
+#include "Herwig/Shower/QTilde/Base/ShowerTree.fh"
namespace Herwig {
struct Branching;
using namespace ThePEG;
/**\ingroup Shower
* Exception class for vetoing a showering
*/
struct VetoShower { };
/**\ingroup Shower
* ShowerVeto is a general interface for performing
* vetoes during showering.
*
* @see \ref ShowerVetoInterfaces "The interfaces"
* defined for ShowerVeto.
*/
class ShowerVeto: public Interfaced {
public:
/**
* Define types of ShowerVetoes
*/
enum ShowerVetoType {
/**
* Throw away emission, if veto encountered. Set the scale to
* the scale of vetoed emission.
*/
Emission = 1,
/**
* Throw away showering
*/
Shower,
/**
* Throw away event
*/
Event
};
public:
/**
* Constructor giving the behaviour of this veto
*/
ShowerVeto (ShowerVetoType vetoType) : _vetoType(vetoType) {}
/**
* Return the type of this veto
*/
ShowerVetoType vetoType () const {return _vetoType;}
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();
public:
/**
* Return true, if the selected emission off the given
* particle and progenitor is vetoed.
*/
virtual bool vetoTimeLike (tcShowerProgenitorPtr, tcShowerParticlePtr,
const Branching&,tcShowerTreePtr) = 0;
/**
* Return true, if the selected emission off the given
* particle and progenitor is vetoed.
*/
virtual bool vetoSpaceLike (tcShowerProgenitorPtr, tcShowerParticlePtr,
const Branching&,tcShowerTreePtr) = 0;
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
ShowerVeto & operator=(const ShowerVeto &);
private:
/**
* The type of this veto.
*/
ShowerVetoType _vetoType;
};
}
#endif /* HERWIG_ShowerVeto_H */
diff --git a/Shower/QTilde/Makefile.am b/Shower/QTilde/Makefile.am
--- a/Shower/QTilde/Makefile.am
+++ b/Shower/QTilde/Makefile.am
@@ -1,29 +1,32 @@
SUBDIRS = Matching
pkglib_LTLIBRARIES = HwShower.la
HwShower_la_LDFLAGS = $(AM_LDFLAGS) -module -version-info 25:0:0
HwShower_la_SOURCES = \
Couplings/ShowerAlphaQCD.h Couplings/ShowerAlphaQCD.cc \
Couplings/ShowerAlphaQED.h Couplings/ShowerAlphaQED.cc\
QTildeShowerHandler.h QTildeShowerHandler.fh QTildeShowerHandler.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\
SplittingFunctions/CMWOneOneOneSplitFn.h SplittingFunctions/CMWOneOneOneSplitFn.cc\
SplittingFunctions/CMWHalfHalfOneSplitFn.h SplittingFunctions/CMWHalfHalfOneSplitFn.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/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/HardTree.cc Base/HardTree.h Base/HardTree.fh \
+Base/HardBranching.h Base/HardBranching.fh Base/HardBranching.cc\
Base/PartnerFinder.h Base/PartnerFinder.fh Base/PartnerFinder.cc \
Base/ShowerVeto.h Base/ShowerVeto.fh Base/ShowerVeto.cc \
-Base/FullShowerVeto.h Base/FullShowerVeto.fh Base/FullShowerVeto.cc
+Base/FullShowerVeto.h Base/FullShowerVeto.fh Base/FullShowerVeto.cc \
+Base/ShowerTree.h Base/ShowerTree.fh Base/ShowerTree.cc
diff --git a/Shower/QTilde/Matching/CKKWTree.h b/Shower/QTilde/Matching/CKKWTree.h
--- a/Shower/QTilde/Matching/CKKWTree.h
+++ b/Shower/QTilde/Matching/CKKWTree.h
@@ -1,149 +1,149 @@
// -*- C++ -*-
#ifndef HERWIG_CKKWTree_H
#define HERWIG_CKKWTree_H
//
// This is the declaration of the CKKWTree class.
//
-#include "Herwig/Shower/Core/Base/HardTree.h"
+#include "Herwig/Shower/QTilde/Base/HardTree.h"
#include "CKKWTree.fh"
namespace Herwig {
using namespace ThePEG;
/**
* Here is the documentation of the CKKWTree class.
*/
class CKKWTree: public HardTree {
public:
/**
* The default constructor.
*/
CKKWTree(vector<HardBranchingPtr>, vector<HardBranchingPtr>, ShowerInteraction);
public:
/**
* Returns true if all spacelike lines are ordered in x
*/
bool checkXOrdering();
/**
* Get lowest Pt in which ever jet definition from the hardtree momentum
*/
Energy lowestPtMomentum( int jetMeasureMode, int cutOption );
/**
* Returns true if all lines in tree are ordered in /tilde(q)
*/
bool checkHardOrdering();
/**
* Returns sum of pts of all branchings in tree
*/
Energy totalPt() { return totalpT_; }
/**
* Calls recursive function to fill externals and nodes
* then finds the internal lines from the nodes
*/
void findNodes();
/**
* Access the nodal branchings
*/
map< HardBranchingPtr, Energy > & getNodes() { return nodes_; }
/**
* Get LowestPt in which ever jet definition from the shower variables
*/
Energy lowestPt( int jetMeasureMode, Energy2 s );
/**
* Is the tree ordered?
*/
bool ordered() const {return ordered_;}
protected:
/**
* Recursive function to find the lowest jet measure in a hardtree from clustered momenta
**/
void getLowestJetMeasure( HardBranchingPtr branch, int jetMeasureMode, int cutOption );
/**
* Function for finding the hadronic jet measure of two partons
**/
Energy hadronJetMeasure( const Lorentz5Momentum & p1,
const Lorentz5Momentum & p2,
bool final );
/**
* Function for finding the Durham or LUCLUS jet measures of two partons
**/
Energy getJetMeasure( const Lorentz5Momentum & p1,
const Lorentz5Momentum & p2,
int jetMeasureMode );
/**
* Function to determine whether a branching consists of external partons
**/
bool externalBranching( HardBranchingPtr a, HardBranchingPtr b );
/**
* Function to recursively find the hard line scales
**/
void fillHardScales( HardBranchingPtr branch, vector< pair< Energy, double > > & currentLine );
/**
* Recursive function to fill externals, nodes and intermediates from the time-like showers
*/
bool fillNodes( HardBranchingPtr );
/**
* Recursive function to fix the parent assignments
*/
bool fixParents( HardBranchingPtr );
private:
/**
* Map containing all nodes with the ingoing partons and their scale
* (this is the the intermediates and their ending node).
*/
map< HardBranchingPtr, Energy > nodes_;
/**
* Scales and z along each hard line to check ordering
*/
vector< vector< pair< Energy, double > > > hardLineScales_;
/**
* The lowest pt of the branchings in the hardtree in whatever
* jet measure according to the hardtree momenta (not the shower variables)
*/
Energy lowestpTMomentum_;
/**
* The sum of the pts of all branchings
*/
Energy totalpT_;
/**
* The hardBranching of softest branching
* This is found by looking at tree end points in fillNodes
*/
HardBranchingPtr lowestpT_;
/**
* Is the tree ordered
*/
bool ordered_;
};
}
#endif /* HERWIG_CKKWTree_H */
diff --git a/Shower/QTilde/Matching/MatchingHandler.h b/Shower/QTilde/Matching/MatchingHandler.h
--- a/Shower/QTilde/Matching/MatchingHandler.h
+++ b/Shower/QTilde/Matching/MatchingHandler.h
@@ -1,448 +1,448 @@
// -*- C++ -*-
#ifndef Herwig_MatchingHandler_H
#define Herwig_MatchingHandler_H
//
// This is the declaration of the MatchingHandler class.
//
#include "Herwig/Shower/QTilde/QTildeShowerHandler.h"
#include "ThePEG/MatrixElement/MEBase.h"
#include "Herwig/MatrixElement/HwMEBase.h"
#include "ThePEG/MatrixElement/DiagramBase.fh"
#include "ThePEG/PDF/PartonExtractor.h"
-#include "Herwig/Shower/Core/Base/HardBranching.h"
+#include "Herwig/Shower/QTilde/Base/HardBranching.h"
#include "ProtoTree.h"
#include "PotentialTree.h"
namespace Herwig {
using namespace ThePEG;
/**
* Here is the documentation of the MatchingHandler class.
*
* @see \ref MatchingHandlerInterfaces "The interfaces"
* defined for MatchingHandler.
*/
class MatchingHandler: public ShowerHandler {
public:
/**
* The default constructor.
*/
MatchingHandler(bool reWeight = false);
/** @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();
//@}
protected:
/**
* Access to the core matrix element
*/
MEPtr matrixElement() const {return matrixElement_;}
/**
* Access to the core Hw++ matrix element
*/
HwMEBasePtr HWMatrixElement() const {return HWmatrixElement_;}
/**
* The PartonExtractor object used to construct remnants.
*/
PExtrPtr partonExtractor() { return partonExtractor_;}
/**
* The pairs of PartonBin objects describing the partons which can
* be extracted by the PartonExtractor object.
*/
PartonPairVec partonBins() {return partonBins_;}
/**
* The pairs of PartonBin objects describing the partons which can
* be extracted by the PartonExtractor object.
*/
void partonBins(PartonPairVec bins) {partonBins_ = bins;}
/**
* The Cuts object to be used for this reader.
*/
CutsPtr & cuts() {return cuts_;}
/**
* Initialise the matching
*/
void initialiseMatching(int minMult, int maxMult);
protected:
/**
* Pointer to the object calculating the strong coupling
*/
ShowerAlphaPtr alphaS() {return alphaS_;}
/**
* whether to just reject event if there are no angular ordered histories (true)
* or to choose one of the non angular ordered histories (false)
*/
bool rejectNonAngularOrdered() {return rejectNonAO_;}
/**
* whether to reject events (true) for which there is no parton shower interpretation
* or just shower them with no reweighting
*/
bool rejectNoShowerHistory() {return rejectNOHistories_;}
/**
* Access to basic info on the event
*/
//@{
/**
* Centre of mass energy
*/
Energy2 sHat() const {return sHat_;}
/**
* Centre of mass energy
*/
void sHat(Energy2 in) {sHat_ = in;}
/**
* The fixed factorization scale used in the MEs.
*/
Energy pdfScale() const {return pdfScale_;}
/**
* The fixed factorization scale used in the MEs.
*/
void pdfScale(Energy in) {pdfScale_ = in;}
/**
* The fixed alphaS value that was used to generate parton configurations
*/
double alphaSMG() const {return alphaSMG_;}
/**
* The fixed alphaS value that was used to generate parton configurations
*/
void alphaSMG(double in) {alphaSMG_ = in;}
/**
* Whether we are treating an event with no shower interpretation
*/
bool noShowerHistory() {return noShowerHists_;}
/**
* whether the current event is a highest multiplicity event.
*/
bool highestMult() const {return highestMult_;}
/**
* whether the current event is a lowest multiplicity event
*/
bool lowestMult() const {return lowestMult_;}
//@}
/**
* Storage of potential shower interpretations
*/
//@{
/**
* Access to the potential branchings
*/
set<ProtoBranchingPtr> & protoBranchings() {return protoBranchings_;}
/**
* The ProtoTrees which will become CKKWTrees
*/
set< ProtoTreePtr > & protoTrees() {return protoTrees_;}
/**
* Access to the select tree
*/
PotentialTree & hardTree() {return hardTree_;}
/**
* Access to the select tree
*/
void hardTree(PotentialTree in) {hardTree_ = in;}
/**
* access to the hard tree object
*/
CKKWTreePtr getCKKWTree() const {return hardTree_.tree();}
/**
* The possible shower configurations that are angular-ordered
*/
vector< pair< PotentialTree, double > > & hardTrees() {
return hardTrees_;
}
/**
* The possible shower configurations that are not angular-ordered
*/
vector< pair< PotentialTree, double > > & nonOrderedTrees() {
return nonOrderedTrees_;
}
//@}
/**
* Returns the diagram corresponding to the (leading-order) hardTree
*/
double getDiagram(PotentialTree &);
/**
* Recursive function to find all possible clustered trees.
* Does not produce any repeated trees.
*/
void fillProtoTrees( ProtoTreePtr );
/**
* update sub process based on the CKKWTree and Diagram
*/
bool updateSubProcess();
/**
* Creates all (ordered) cluster histories and selects one.
*/
PotentialTree doClustering();
/**
* Calculate the Sudakov weight
*/
virtual double sudakovWeight( CKKWTreePtr ) = 0;
/**
* Select the hard tree
*/
virtual PotentialTree chooseHardTree(double totalWeight,
double nonOrderedWeight) = 0;
/**
* Function looks to see if a cluster of the branchings already exists
* in protoBranchings_ if so returns the pointer to that protoBranching
* if not creates the hardBranchings, adds it
* to protoBranchings and returns the pointer
*/
tProtoBranchingPtr getCluster( tProtoBranchingPtr, tProtoBranchingPtr );
/**
* Checks whether a ProtoTree containing the same branchings already
* exists in protoTrees_ in which case the current tree is a repeat
* and should be removed (and not recursed)
*/
bool repeatProtoTree( ProtoTreePtr currentProtoTree );
/**
* Returns the branching element for an FS-FS clustering
*/
BranchingElement allowedFinalStateBranching( tProtoBranchingPtr &,
tProtoBranchingPtr &);
/**
* Returns the branching element for an IS-FS clustering
*/
BranchingElement allowedInitialStateBranching( tProtoBranchingPtr & ,
tProtoBranchingPtr &);
/**
* Find decaying particles
*/
void findDecayingParticles(PPtr parent);
/**
* Check if a decayed particle
*/
map<PPtr,ParticleVector>::const_iterator parent(PPtr parent);
/**
* Add the decay products of a particle to the new SubProcess
*/
void addDecayProducts(SubProPtr subProcess, PPtr parent,
map<PPtr,ParticleVector>::const_iterator decay,
const LorentzRotation & boost) const;
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
MatchingHandler & operator=(const MatchingHandler &);
private:
/**
* Whether or not to reweight
*/
bool reWeight_;
/**
* whether to just reject event if there are no angular ordered histories (true)
* or to choose one of the non angular ordered histories (false)
*/
bool rejectNonAO_;
/**
* whether to reject events (true) for which there is no parton shower interpretation
* or just shower them with no reweighting
*/
bool rejectNOHistories_;
/**
* Include decaying particles
*/
bool includeDecays_;
/**
* The matrix element for the core process
*/
MEPtr matrixElement_;
/**
* The cast matrix element
*/
HwMEBasePtr HWmatrixElement_;
/**
* The PartonExtractor object used to construct remnants.
*/
PExtrPtr partonExtractor_;
/**
* The pairs of PartonBin objects describing the partons which can
* be extracted by the PartonExtractor object.
*/
PartonPairVec partonBins_;
/**
* The Cuts object to be used for this reader.
*/
CutsPtr cuts_;
/**
* Centre of mass energy
*/
Energy2 sHat_;
/**
* Pointer to the object calculating the strong coupling
*/
ShowerAlphaPtr alphaS_;
/**
* The fixed factorization scale used in the MEs.
*/
Energy pdfScale_;
/**
* The fixed alphaS value that was used to generate parton configurations
*/
double alphaSMG_;
private:
/**
* Storage of the potential shower interpretation
*/
//@{
/**
* All the Protobranchings used in finding the shower histories
*/
set<ProtoBranchingPtr> protoBranchings_;
/**
* The ProtoTrees which will become CKKWTrees
*/
set< ProtoTreePtr > protoTrees_;
/**
* The chosen hard tree
*/
PotentialTree hardTree_;
/**
* The possible shower configurations that are angular-ordered
*/
vector< pair< PotentialTree, double > > hardTrees_;
/**
* The possible shower configurations that are not angular-ordered
*/
vector< pair< PotentialTree, double > > nonOrderedTrees_;
/**
* Any decays
*/
map<PPtr,ParticleVector> decayingParticles_;
/**
* Whether we are treating an event with no shower interpretation
*/
bool noShowerHists_;
/**
* Whether we are treating the highest multiplicity contribution
*/
bool highestMult_;
/**
* Whether we are treating the lowest multiplicity contribution
*/
bool lowestMult_;
//@}
/**
* Which branchings are allowed?
*/
//@{
/**
* The allowed final-state branchings
*/
map<pair<long,long>,pair<SudakovPtr,IdList> > allowedFinal_;
/**
* The allowed initial-state branchings
*/
multimap<long, pair<SudakovPtr,IdList> > allowedInitial_;
//@}
};
}
#endif /* Herwig_MatchingHandler_H */
diff --git a/Shower/QTilde/Matching/PowhegShowerHandler.cc b/Shower/QTilde/Matching/PowhegShowerHandler.cc
--- a/Shower/QTilde/Matching/PowhegShowerHandler.cc
+++ b/Shower/QTilde/Matching/PowhegShowerHandler.cc
@@ -1,1103 +1,1103 @@
// -*- C++ -*-
//
// PowhegShowerHandler.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 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 PowhegShowerHandler class.
//
#include <config.h>
#include "PowhegShowerHandler.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 "ThePEG/Utilities/DescribeClass.h"
// include theses to have complete types
#include "Herwig/Shower/Core/Base/ShowerParticle.h"
#include "Herwig/PDF/MPIPDF.h"
#include "Herwig/PDF/MinBiasPDF.h"
-#include "Herwig/Shower/Core/Base/ShowerTree.h"
+#include "Herwig/Shower/QTilde/Base/ShowerTree.h"
#include "Herwig/Shower/QTilde/Base/KinematicsReconstructor.h"
#include "Herwig/Shower/QTilde/Base/PartnerFinder.h"
#include "Herwig/PDF/HwRemDecayer.h"
#include "Herwig/Shower/Core/Base/ShowerProgenitor.h"
-#include "Herwig/Shower/Core/Base/HardBranching.h"
-#include "Herwig/Shower/Core/Base/HardTree.h"
+#include "Herwig/Shower/QTilde/Base/HardBranching.h"
+#include "Herwig/Shower/QTilde/Base/HardTree.h"
#include "Herwig/MatrixElement/HwMEBase.h"
#include "ThePEG/MatrixElement/MEBase.h"
#include "ThePEG/MatrixElement/DiagramBase.fh"
#include "ThePEG/PDF/PartonExtractor.h"
#include "Herwig/MatrixElement/Matchbox/MatchboxFactory.h"
#include "Herwig/MatrixElement/Matchbox/Utility/DiagramDrawer.h"
using namespace Herwig;
namespace {
struct ParticleOrdering {
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() );
}
};
}
IBPtr PowhegShowerHandler::clone() const {
return new_ptr(*this);
}
IBPtr PowhegShowerHandler::fullclone() const {
return new_ptr(*this);
}
HardTreePtr PowhegShowerHandler::generateCKKW(ShowerTreePtr showerTree) const {
// hard subprocess
tSubProPtr sub = lastXCombPtr()->subProcess();
// real emission sub-process
tSubProPtr real = Factory()->hardTreeSubprocess();
// born emitter
emitter_ = Factory()->hardTreeEmitter();
spectator_ = Factory()->hardTreeSpectator();
// if no hard emission return
if ( !(real && emitter_>-1) )
return HardTreePtr();
// check emission
if(sub->outgoing().size()>=real->outgoing().size())
return HardTreePtr();
// check if decay has radiated don't add it
if(showerTree->outgoingLines().size() != sub->outgoing().size()) {
// loop over the decay trees
for(map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator
tit=showerTree->treelinks().begin(); tit != showerTree->treelinks().end(); ++tit) {
if(tit->first->outgoingLines().empty()) continue;
// match the particles
set<tPPtr> decayProducts;
set<PPtr> outgoing(real->outgoing().begin(),real->outgoing().end());
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator oit=tit->first->outgoingLines().begin();
oit!=tit->first->outgoingLines().end();++oit) {
tPPtr decayProd;
Energy2 dmin( 1e30*GeV2 );
tPPtr part = oit->second->original();
for( set<PPtr>::const_iterator it = outgoing.begin(); it != outgoing.end(); ++it ) {
if((**it).id()!=part->id()) continue;
Energy2 dtest =
sqr( part->momentum().x() - (**it).momentum().x() ) +
sqr( part->momentum().y() - (**it).momentum().y() ) +
sqr( part->momentum().z() - (**it).momentum().z() ) +
sqr( part->momentum().t() - (**it).momentum().t() );
dtest += 1e10*sqr(part->momentum().m()-(**it).momentum().m());
if( dtest < dmin ) {
decayProd = *it;
dmin = dtest;
}
}
if(!decayProd) {
throw Exception() << "PowhegShowerHandler::generateCKKW(). Can't match shower and hard trees."
<< Exception::eventerror;
}
outgoing .erase (decayProd);
decayProducts.insert(decayProd);
}
bool coloured = false, foundParent = true;
tPPtr parent,emitted;
unsigned int nprod(0);
for( set<tPPtr>::const_iterator it = decayProducts.begin(); it != decayProducts.end(); ++it ) {
coloured |= (**it).dataPtr()->coloured();
tPPtr newParent = !(**it).parents().empty() ? (**it).parents()[0] : tPPtr();
++nprod;
// check if from emission
if(newParent->id()==(**it).id()) {
if(newParent->children().size()!=2) foundParent=false;
bool foundChild(false), foundGluon(false);
for(unsigned int ix=0;ix<newParent->children().size();++ix) {
if(newParent->children()[ix]==*it) {
foundChild = true;
continue;
}
else if(newParent->children()[ix]->id()==ParticleID::g) {
foundGluon = true;
continue;
}
}
if(foundChild && foundGluon) {
newParent = !newParent->parents().empty() ? newParent->parents()[0] : tPPtr();
++nprod;
}
else
foundParent = false;
}
if(!newParent) {
foundParent = false;
}
else if(!parent) {
parent = newParent;
}
else {
if(parent!=newParent) foundParent = false;
}
}
if(nprod!=tit->first->outgoingLines().size()&&foundParent) {
if(decayRadiation_==0) {
throw Exception() << "The radiation generated in this event\n "
<< *real << "\n has been interepted as occuring in the "
<< "decay \nof a colour-singlet object and cannot be handled "
<< "you can either not simulated this process, "
<< "veto this class of events by using\n"
<< "set " << fullName() << ":DecayRadiation VetoEvent\n"
<< "or throw the hard radiation away using \n"
<< "set " << fullName() << ":DecayRadiation VetoRadiation\n"
<< "Please contact us at herwig@hepforge.org for advice\n"
<< "on how to simulate this process\n"
<< Exception::runerror;
}
else if(decayRadiation_==1) {
throw Exception() << "The radiation generated in this event\n "
<< *real << "\n has been interepted as occuring in the "
<< "decay \nof a colour-singlet object and cannot be handled "
<< "vetoing event\n"
<< Exception::eventerror;
}
else if(decayRadiation_==2) {
generator()->log() << "The radiation generated in this event\n "
<< *real << "\n has been interepted as occuring in the "
<< "decay \nof a colour-singlet object and cannot be handled "
<< "vetoing radiation\n";
return HardTreePtr();
}
else
assert(false);
}
}
}
tStdXCombPtr lastXC = dynamic_ptr_cast<tStdXCombPtr>(lastXCombPtr());
tStdXCombPtr headXC = lastXC->head();
if (headXC)
matrixElement_ = dynamic_ptr_cast<MEPtr>(headXC->matrixElement());
else if (lastXC)
matrixElement_ = dynamic_ptr_cast<MEPtr>(lastXC->matrixElement());
if (lastXC){
tStdXCombPtr projector= lastXC->lastProjector();
if (projector){
matrixElement_ = dynamic_ptr_cast<MEPtr>(projector->matrixElement());
setSubtractionIntegral(true);
}
else
setSubtractionIntegral(false);
}
assert(matrixElement_);
// create a hard tree by clustering the event
try {
hardTree(doClustering(real,showerTree));
} catch(exception &e) {
throw Exception() << "Caught a problem in PowhegShowerHandler::doClustering " << e.what()
<< Exception::eventerror;
}
// Get the HardTree from the CKKW handler.
CKKWTreePtr hardtree = hardTree().tree();
// zero to avoid MPI problems
Factory()->setHardTreeEmitter(-1);
Factory()->setHardTreeSubprocess(SubProPtr());
return hardtree;
}
PotentialTree PowhegShowerHandler::doClustering(tSubProPtr real,ShowerTreePtr showerTree) const {
// clear storage of the protoTrees
protoBranchings().clear();
protoTrees().clear();
hardTrees_.clear();
assert( matrixElement() );
// extract the XComb for the Born process
tStdXCombPtr lastXC;
if (subtractionIntegral()){
tStdXCombPtr lastXCReal = dynamic_ptr_cast<tStdXCombPtr>(lastXCombPtr());
lastXC = lastXCReal->lastProjector();
}
else
lastXC = dynamic_ptr_cast<tStdXCombPtr>(lastXCombPtr());
const StandardXComb xc= *lastXC;
// get the particles for the born process
PPair incomingBorn = xc.subProcess()->incoming();
ParticleVector outgoingBorn = xc.subProcess()->outgoing();
// get particles from the XComb object for the real process
ParticleVector outgoing = real->outgoing();
PPair incoming = real->incoming();
// loop through the FS particles and create ProtoBranchings
for( unsigned int i = 0; i < outgoing.size(); ++i) {
tPPtr parent = outgoing[i]->parents()[0];
ProtoBranchingPtr currentBranching =
new_ptr(ProtoBranching(outgoing[i]->dataPtr(),HardBranching::Outgoing,
outgoing[i]->momentum(),tSudakovPtr()));
currentBranching-> colourLine(outgoing[i]-> colourLine());
currentBranching->antiColourLine(outgoing[i]->antiColourLine());
protoBranchings().insert(currentBranching);
}
// add IS hardBranchings
ProtoBranchingPtr currentBranching =
new_ptr(ProtoBranching(incoming.first ->dataPtr(),HardBranching::Incoming,
incoming.first ->momentum(),tSudakovPtr()));
currentBranching-> colourLine(incoming.first-> colourLine());
currentBranching->antiColourLine(incoming.first->antiColourLine());
protoBranchings().insert(currentBranching);
currentBranching =
new_ptr(ProtoBranching(incoming.second->dataPtr(),HardBranching::Incoming,
incoming.second->momentum(),tSudakovPtr()));
currentBranching-> colourLine(incoming.second-> colourLine());
currentBranching->antiColourLine(incoming.second->antiColourLine());
protoBranchings().insert(currentBranching);
// create and initialise the first tree
ProtoTreePtr initialProtoTree = new_ptr( ProtoTree() );
for(set<ProtoBranchingPtr>::const_iterator it=protoBranchings().begin();
it!=protoBranchings().end();++it) {
initialProtoTree->addBranching(*it);
}
// fill _proto_trees with all possible trees
protoTrees().insert(initialProtoTree );
fillProtoTrees( initialProtoTree , xc.mePartonData()[emitter_]->id() );
// create a HardTree from each ProtoTree and fill hardTrees()
for( set< ProtoTreePtr >::const_iterator cit = protoTrees().begin();
cit != protoTrees().end(); ++cit ) {
set<tPPtr> bornParticles(outgoingBorn.begin(),outgoingBorn.end());
bornParticles.insert(incomingBorn.first );
bornParticles.insert(incomingBorn.second);
PotentialTree newTree;
newTree.tree((**cit).createHardTree());
// new check based on the colour structure
map<ColinePtr,ColinePtr> cmap;
// make the colour connections in the tree
ShowerParticleVector branchingParticles;
map<ShowerParticlePtr,HardBranchingPtr> branchingMap;
bool matched(true);
int iemitter(-1);
HardBranchingPtr emitter;
map<int,HardBranchingPtr> locMap;
for( set< HardBranchingPtr >::iterator it = newTree.tree()->branchings().begin();
it != newTree.tree()->branchings().end(); ++it ) {
matched = true;
// map the particle to the branching for future use
branchingParticles.push_back((**it).branchingParticle());
branchingMap.insert(make_pair((**it).branchingParticle(),*it));
tPPtr bornPartner;
if((**it).status()==HardBranching::Incoming) {
HardBranchingPtr parent=*it;
while(parent->parent()) {
parent = parent->parent();
};
if(parent->branchingParticle()->momentum().z()/incomingBorn.first->momentum().z()>0.) {
bornPartner = incomingBorn.first;
if(!parent->children().empty()) {
iemitter = 0;
emitter = *it;
}
locMap[0] = *it;
}
else {
bornPartner = incomingBorn.second;
if(!parent->children().empty()) {
iemitter = 1;
emitter = *it;
}
locMap[1] = *it;
}
}
else {
Energy2 dmin( 1e30*GeV2 );
for(set<tPPtr>::const_iterator bit=bornParticles.begin();bit!=bornParticles.end();
++bit) {
if((**it).branchingParticle()->id()!=(**bit).id()) continue;
if(*bit==incomingBorn.first||*bit==incomingBorn.second) continue;
Energy2 dtest =
sqr( (**bit).momentum().x() - (**it).branchingParticle()->momentum().x() ) +
sqr( (**bit).momentum().y() - (**it).branchingParticle()->momentum().y() ) +
sqr( (**bit).momentum().z() - (**it).branchingParticle()->momentum().z() ) +
sqr( (**bit).momentum().t() - (**it).branchingParticle()->momentum().t() );
dtest += 1e10*sqr((**bit).momentum().m()-(**it).branchingParticle()->momentum().m());
if( dtest < dmin ) {
bornPartner = *bit;
dmin = dtest;
}
}
// find the map
int iloc(-1);
for(unsigned int ix=0;ix<outgoingBorn.size();++ix) {
if(outgoingBorn[ix]==bornPartner) {
iloc = ix+2;
break;
}
}
if(!(**it).children().empty()) {
emitter = *it;
iemitter = iloc;
}
locMap[iloc]= *it;
}
if(!bornPartner) {
matched=false;
break;
}
bornParticles.erase(bornPartner);
// skip the next block if not enforcing colour consistency
if(!enforceColourConsistency_) continue;
if((**it).branchingParticle()->colourLine()) {
if(cmap.find((**it).branchingParticle()->colourLine())!=cmap.end()) {
if(cmap[(**it).branchingParticle()->colourLine()]!=bornPartner->colourLine()) {
matched=false;
}
}
else {
cmap[(**it).branchingParticle()->colourLine()] = bornPartner->colourLine();
}
}
if((**it).branchingParticle()->antiColourLine()) {
if(cmap.find((**it).branchingParticle()->antiColourLine())!=cmap.end()) {
if(cmap[(**it).branchingParticle()->antiColourLine()]!=bornPartner->antiColourLine()) {
matched=false;
}
}
else {
cmap[(**it).branchingParticle()->antiColourLine()] = bornPartner->antiColourLine();
}
}
// require a match
if(!matched) break;
}
// if no match continue
if(!matched) continue;
// now sort out any decays
if(showerTree->outgoingLines().size()+showerTree->incomingLines().size()
!= newTree.tree()->branchings().size()) {
if(showerTree->treelinks().empty()) {
matched = false;
continue;
}
// loop over the decay trees
for(map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator
tit=showerTree->treelinks().begin(); tit != showerTree->treelinks().end(); ++tit) {
if(tit->first->outgoingLines().empty()) continue;
set<HardBranchingPtr> decayProducts;
set<HardBranchingPtr> branchings = newTree.tree()->branchings();
// match the particles
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator oit=tit->first->outgoingLines().begin();
oit!=tit->first->outgoingLines().end();++oit) {
HardBranchingPtr decayProd;
Energy2 dmin( 1e30*GeV2 );
tPPtr part = oit->second->original();
for( set< HardBranchingPtr >::iterator it = branchings.begin(); it != branchings.end(); ++it ) {
if((**it).status()==HardBranching::Incoming ) continue;
if((**it).branchingParticle()->id()!=part->id()) continue;
Energy2 dtest =
sqr( part->momentum().x() - (**it).branchingParticle()->momentum().x() ) +
sqr( part->momentum().y() - (**it).branchingParticle()->momentum().y() ) +
sqr( part->momentum().z() - (**it).branchingParticle()->momentum().z() ) +
sqr( part->momentum().t() - (**it).branchingParticle()->momentum().t() );
dtest += 1e10*sqr(part->momentum().m()-(**it).branchingParticle()->momentum().m());
if( dtest < dmin ) {
decayProd = *it;
dmin = dtest;
}
}
if(!decayProd) {
throw Exception() << "PowhegShowerHandler::generateCKKW(). Can't match shower and hard trees."
<< Exception::eventerror;
}
branchings .erase (decayProd);
decayProducts.insert(decayProd);
}
// erase the decay products
Lorentz5Momentum pnew,pshower;
for(set<HardBranchingPtr>::iterator it = decayProducts.begin(); it!=decayProducts.end(); ++it) {
newTree.tree()->branchings().erase(*it);
pnew += (**it).branchingParticle()->momentum();
pshower += (**it).showerMomentum();
}
pnew .setMass(tit->second.second->mass());
pshower.setMass(tit->second.second->mass());
pnew .rescaleEnergy();
pshower.rescaleEnergy();
// create the decaying particle
ShowerParticlePtr particle = new_ptr( ShowerParticle( tit->second.second->dataPtr() , true ) );
particle->set5Momentum( pnew );
HardBranchingPtr newBranch = new_ptr( HardBranching( particle, tSudakovPtr(),
HardBranchingPtr(),
HardBranching::Outgoing ) );
newBranch->showerMomentum(pshower);
newTree.tree()->branchings().insert(newBranch);
}
}
// if no match continue
if(!matched) continue;
// find the colour partners
try {
showerModel()->partnerFinder()
->setInitialEvolutionScales(branchingParticles,false,
ShowerInteraction::QCD,true);
}
catch( Exception & e ) {
generator()->log() << "Problem in set evolution scales in "
<< "PowhegShowerHandler::doClustering(). Exception was"
<< e.what();
continue;
}
for(unsigned int ix=0;ix<branchingParticles.size();++ix) {
if(branchingParticles[ix]->partner()) {
HardBranchingPtr partner = branchingMap[branchingParticles[ix]->partner()];
branchingMap[branchingParticles[ix]]->colourPartner(partner);
}
}
if(forcePartners_) {
locMap[emitter_ ]->colourPartner(locMap[spectator_]);
locMap[spectator_]->colourPartner(locMap[emitter_ ]);
locMap[emitter_ ]->branchingParticle()->partner(locMap[spectator_]->branchingParticle());
locMap[spectator_]->branchingParticle()->partner(locMap[emitter_ ]->branchingParticle());
}
newTree.tree()->partnersSet(true);
// set the beam particles
PPair beams = lastXCombPtr()->lastParticles();
// remove children of beams
PVector beam_children = beams.first->children();
if( (**newTree.tree()->incoming().begin()).branchingParticle()->momentum().z() /
beams.first->momentum().z() < 0.)
swap( beams.first, beams.second );
set<HardBranchingPtr>::iterator it = newTree.tree()->incoming().begin();
HardBranchingPtr br = *it;
br->beam( beams.first );
while ( !br->children().empty() ) {
for(unsigned int ix = 0; ix < br->children().size(); ++ix ) {
if( br->children()[ix]->status() == HardBranching::Incoming ) {
br = br->children()[ix];
break;
}
}
br->beam( beams.first );
}
++it;
br = *it;
br->beam( beams.second );
while ( !br->children().empty() ) {
for( unsigned int ix = 0; ix < br->children().size(); ++ix ) {
if( br->children()[ix]->status() == HardBranching::Incoming ) {
br = br->children()[ix];
break;
}
}
br->beam( beams.second );
}
// check the emitter and the spectator some how
if(iemitter!=emitter_) continue;
//do inverse momentum reconstruction
if( !showerModel()->kinematicsReconstructor()
->deconstructHardJets( newTree.tree(), ShowerInteraction::QCD ) ) continue;
newTree.tree()->findNodes();
newTree.weight(1.);
hardTrees_.push_back( make_pair( newTree, 1. ) );
}
// select the tree
PotentialTree chosen_hardTree;
if (hardTrees_.size()==1) {
chosen_hardTree = hardTrees_[0].first;
}
else {
// if multiple trees pick the one with matching
// intermediate particle momenta
for (unsigned int il=0; il<hardTrees_.size(); ++il){
vector<pair <long int, Lorentz5Momentum> > particles;
PotentialTree testTree = hardTrees_[il].first;
CKKWTreePtr check = testTree.tree();
// get id and momenta of particles in hard tree
for (set< HardBranchingPtr >::iterator it=check->branchings().begin();
it!=check->branchings().end(); ++it) {
particles.push_back(make_pair((*it)->branchingParticle()->id(),
(*it)->branchingParticle()->momentum()));
if (!(*it)->children().empty()){
for (unsigned int ic=0; ic<(*it)->children().size(); ++ic)
particles.push_back(make_pair((*it)->children()[ic]->branchingParticle()->id(),
(*it)->children()[ic]->branchingParticle()->momentum()));
}
if ((*it)->parent()){
particles.push_back(make_pair((*it)->parent()->branchingParticle()->id(),
(*it)->parent()->branchingParticle()->momentum()));
if (!(*it)->parent()->children().empty()) {
for (unsigned int ic=0; ic<(*it)->parent()->children().size(); ++ic) {
if(*it==(*it)->parent()->children()[ic]) continue;
particles.push_back(make_pair((*it)->parent()->children()[ic]->branchingParticle()->id(),
(*it)->parent()->children()[ic]->branchingParticle()->momentum()));
}
}
}
}
// loop through and match to particles in real subprocess
vector<pair <long int, Lorentz5Momentum> >::iterator part = particles.begin();
// incoming
for (; part!=particles.end(); ++part){
if ((*part).first==real->incoming().first->id() &&
fuzzyEqual((*part).second, real->incoming().first->momentum()))
break;
}
if (part!=particles.end()) particles.erase(part);
part = particles.begin();
for (; part!=particles.end(); ++part){
if ((*part).first==real->incoming().second->id() &&
fuzzyEqual((*part).second, real->incoming().second->momentum()))
break;
}
if (part!=particles.end()) particles.erase(part);
// outgoing
for (unsigned int io=0; io<real->outgoing().size(); ++io){
part = particles.begin();
for (; part!=particles.end(); ++part){
if ((*part).first==real->outgoing()[io]->id() &&
fuzzyEqual((*part).second, real->outgoing()[io]->momentum()))
break;
}
if (part!=particles.end()) particles.erase(part);
}
// intermediate
for (unsigned int ii=0; ii<real->intermediates().size(); ++ii){
part = particles.begin();
for (; part!=particles.end(); ++part){
if ((*part).first==real->intermediates()[ii]->id() &&
fuzzyEqual((*part).second, real->intermediates()[ii]->momentum()))
break;
}
if (part!=particles.end()) particles.erase(part);
}
// intermediate CC with -1*momentum
for (unsigned int ii=0; ii<real->intermediates().size(); ++ii){
part = particles.begin();
for (; part!=particles.end(); ++part){
if (!real->intermediates()[ii]->coloured() ||
(real->intermediates()[ii]->hasColour() &&
real->intermediates()[ii]->hasAntiColour())){
if ((*part).first==real->intermediates()[ii]->id() &&
fuzzyEqual((*part).second, -1.*real->intermediates()[ii]->momentum()) )
break;
}
else {
if ((*part).first==-1.*real->intermediates()[ii]->id() &&
fuzzyEqual((*part).second, -1.*real->intermediates()[ii]->momentum()) )
break;
}
}
if (part!=particles.end()) particles.erase(part);
}
// if all particles match, set as hardtree
if (particles.empty()){
chosen_hardTree = testTree;
break;
}
}
}
protoBranchings().clear();
protoTrees().clear();
hardTrees_.clear();
if(! chosen_hardTree.tree() ) {
return PotentialTree();
}
else
return chosen_hardTree;
}
bool PowhegShowerHandler::checkDiagram(PotentialTree & tree,
tcDiagPtr loDiagram) const {
set<HardBranchingPtr>::const_iterator cit;
tcPDPair incoming;
multiset<tcPDPtr,ParticleOrdering> outgoing;
//get the incoming and outgoing partons involved in hard process
for( cit = tree.tree()->branchings().begin();
cit != tree.tree()->branchings().end(); ++cit ){
if( (*cit)->status() ==HardBranching::Incoming) {
HardBranchingPtr parent = *cit;
while(parent->parent()) parent = parent->parent();
if( parent->branchingParticle()->momentum().z()>ZERO )
incoming.first = (*cit)->branchingParticle()->dataPtr();
else
incoming.second = (*cit)->branchingParticle()->dataPtr();
}
else {
outgoing.insert( (*cit)->branchingParticle()->dataPtr() );
}
}
if(!incoming.first || !incoming.second)
return 0.;
pair<string,string> tag;
tag.first = incoming.first ->PDGName() + "," + incoming.second->PDGName() + "->";
tag.second = incoming.second ->PDGName() + "," + incoming.first ->PDGName() + "->";
string tag_out;
for ( multiset<tcPDPtr,ParticleOrdering>::iterator i = outgoing.begin();
i != outgoing.end(); ++i ) {
if ( i != outgoing.begin() ) tag_out += ",";
tag_out += (**i).PDGName();
}
tag.first += tag_out;
tag.second += tag_out;
// find the diagrams
if( tag.first == loDiagram->getTag() ||
tag.second == loDiagram->getTag() )
tree.diagram(loDiagram);
// check this is allowed
return tree.diagram();
}
void PowhegShowerHandler::fillProtoTrees( ProtoTreePtr currentProtoTree,long id ) const {
if(currentProtoTree->branchings().size()==(lastXCombPtr()->subProcess()->outgoing().size()+2))
return;
for( set<tProtoBranchingPtr>::const_iterator
ita = currentProtoTree->branchings().begin();
ita!=currentProtoTree->branchings().end();++ita) {
for( set<tProtoBranchingPtr>::const_iterator
itb = currentProtoTree->branchings().begin();
itb!=ita;++itb) {
// can't merge two incoming branchings
if( (**ita).status() == HardBranching::Incoming &&
(**itb).status() == HardBranching::Incoming ) continue;
// if branching must be outgoing, skip incoming
if(emitter_>=2 && ( (**ita).status() == HardBranching::Incoming ||
(**itb).status() == HardBranching::Incoming ))
continue;
// if branching must be incoming, skip outgoing
if(emitter_<2 && ( (**ita).status() != HardBranching::Incoming &&
(**itb).status() != HardBranching::Incoming ))
continue;
// get a new branching for this pair
ProtoBranchingPtr currentBranching = getCluster(*ita,*itb);
// check branching with the right PID
if( ! currentBranching ||
currentBranching->id() != id)
continue;
// branching allowed so make a new Tree out of these branchings
set< tProtoBranchingPtr > newTreeBranchings = currentProtoTree->branchings();
newTreeBranchings.erase(*ita);
newTreeBranchings.erase(*itb);
newTreeBranchings.insert(currentBranching);
ProtoTreePtr newProtoTree = new_ptr( ProtoTree( newTreeBranchings ) );
// remove duplicate trees
if( ! repeatProtoTree( newProtoTree ) ) protoTrees().insert( newProtoTree );
// remove the current tree if it hasn't already been removed
if( protoTrees().find( currentProtoTree ) != protoTrees().end() )
protoTrees().erase( currentProtoTree );
// do recursion
fillProtoTrees( newProtoTree , id);
}
}
}
bool PowhegShowerHandler::repeatProtoTree( ProtoTreePtr currentProtoTree ) const {
// loop over all prototrees and see
// how many ProtoBranchings of current ProtoTree are found in each
for( set< ProtoTreePtr >::const_iterator cit = protoTrees().begin();
cit != protoTrees().end(); ++cit ) {
unsigned int no_matches = 0;
for( set< tProtoBranchingPtr >::const_iterator ckt
= currentProtoTree->branchings().begin();
ckt != currentProtoTree->branchings().end(); ckt++ ) {
if( (*cit)->branchings().find( *ckt ) != (*cit)->branchings().end() )
++no_matches;
}
// return true if all match
if( no_matches == currentProtoTree->branchings().size() )
return true;
}
return false;
}
tProtoBranchingPtr PowhegShowerHandler::getCluster( tProtoBranchingPtr b1,
tProtoBranchingPtr b2 ) const {
// look for the clustered pair in protoBranchings_
for(set<ProtoBranchingPtr>::const_iterator cit = protoBranchings().begin();
cit != protoBranchings().end(); ++cit) {
// both outgoing
if(b1->status()==HardBranching::Outgoing &&
b2->status()==HardBranching::Outgoing) {
if((**cit).status()!=HardBranching::Outgoing||
(**cit).children().empty()) continue;
if( ( b1 == (**cit).children()[0] && b2 == (**cit).children()[1] ) ||
( b1 == (**cit).children()[1] && b2 == (**cit).children()[0] ) )
return *cit;
}
// first incoming
else if(b1->status()==HardBranching::Incoming) {
if((**cit).backChildren().empty() ) continue;
if(b1!=(**cit).backChildren()[0]) continue;
if(b2==(**cit).backChildren()[1]) return *cit;
}
// second incoming
else if(b2->status()==HardBranching::Incoming) {
if((**cit).backChildren().empty() ) continue;
if(b2!=(**cit).backChildren()[0]) continue;
if(b1==(**cit).backChildren()[1]) return *cit;
}
}
// is branching incoming or outgoing
bool incoming = b1->status()==HardBranching::Incoming ||
b2->status()==HardBranching::Incoming;
// get the branching
BranchingElement theBranching;
if( !incoming ) theBranching = allowedFinalStateBranching( b1, b2 );
else theBranching = allowedInitialStateBranching( b1, b2 );
//if branching is not allowed return null ProtoBrancing
if( !theBranching.sudakov ) return ProtoBranchingPtr();
// get the ParticleData object for the new branching
tcPDPtr particle_data = incoming ? theBranching.particles[1] : theBranching.particles[0];
// create clustered ProtoBranching
ProtoBranchingPtr clusteredBranch;
// outgoing
if( !incoming ) {
Lorentz5Momentum pairMomentum = b1->momentum() + b2->momentum();
pairMomentum.setMass(ZERO);
clusteredBranch = new_ptr(ProtoBranching(particle_data,HardBranching::Outgoing,
pairMomentum, theBranching.sudakov));
if(particle_data->iColour()==PDT::Colour0)
return ProtoBranchingPtr();
else if(particle_data->iColour()==PDT::Colour3) {
if(b1->particle()->iColour()==PDT::Colour3 && b2->particle()->iColour()==PDT::Colour8) {
if(b1->colourLine()!=b2->antiColourLine())
return ProtoBranchingPtr();
clusteredBranch->colourLine(b2->colourLine());
}
else if(b2->particle()->iColour()==PDT::Colour3 && b1->particle()->iColour()==PDT::Colour8) {
if(b2->colourLine()!=b1->antiColourLine())
return ProtoBranchingPtr();
clusteredBranch->antiColourLine(b1->colourLine());
}
else
assert(false);
clusteredBranch->type(ShowerPartnerType::QCDColourLine);
}
else if(particle_data->iColour()==PDT::Colour3bar) {
if(b1->particle()->iColour()==PDT::Colour3bar && b2->particle()->iColour()==PDT::Colour8) {
if(b1->antiColourLine()!=b2->colourLine())
return ProtoBranchingPtr();
clusteredBranch->antiColourLine(b2->antiColourLine());
}
else if(b2->particle()->iColour()==PDT::Colour3bar && b1->particle()->iColour()==PDT::Colour8) {
if(b2->antiColourLine()!=b1->colourLine())
return ProtoBranchingPtr();
clusteredBranch->antiColourLine(b1->antiColourLine());
}
else
assert(false);
clusteredBranch->type(ShowerPartnerType::QCDAntiColourLine);
}
else if(particle_data->iColour()==PDT::Colour8) {
tProtoBranchingPtr coloured,antiColoured;
if(b1->particle()->iColour()==PDT::Colour3 &&
b2->particle()->iColour()==PDT::Colour3bar) {
coloured = b1;
antiColoured = b2;
}
else if(b2->particle()->iColour()==PDT::Colour3 &&
b1->particle()->iColour()==PDT::Colour3bar) {
coloured = b2;
antiColoured = b1;
}
else if(b1->particle()->iColour()==PDT::Colour8 &&
b2->particle()->iColour()==PDT::Colour8 ) {
if(b1->colourLine()==b2->antiColourLine()) {
coloured = b2;
antiColoured = b1;
}
else if(b2->colourLine()==b1->antiColourLine()) {
coloured = b1;
antiColoured = b2;
}
else
return ProtoBranchingPtr();
}
else
assert(false);
// can't have colour self connected gluons
if(coloured-> colourLine()==antiColoured->antiColourLine())
return ProtoBranchingPtr();
clusteredBranch-> colourLine( coloured-> colourLine());
clusteredBranch->antiColourLine(antiColoured->antiColourLine());
// softest particle is the emitted
if(coloured->momentum().t()>antiColoured->momentum().t()) {
clusteredBranch->type(ShowerPartnerType::QCDAntiColourLine);
}
else {
clusteredBranch->type(ShowerPartnerType::QCDColourLine);
}
}
else
assert(false);
}
// incoming
else {
Lorentz5Momentum pairMomentum = b1->momentum() - b2->momentum();
pairMomentum.setMass( ZERO );
// check for CC
if( particle_data->CC() &&
( b1->id() != theBranching.particles[0]->id() ||
b2->id() != theBranching.particles[2]->id() ) ) {
particle_data = particle_data->CC();
}
clusteredBranch = new_ptr(ProtoBranching(particle_data,HardBranching::Incoming,
pairMomentum,theBranching.sudakov));
// work out the type of branching
if(b1->particle()->iColour()==PDT::Colour3) {
b1->type(ShowerPartnerType::QCDColourLine);
if(b2->particle()->iColour()==PDT::Colour3 &&
particle_data->iColour()==PDT::Colour8) {
if(b1->colourLine()==b2->colourLine())
return ProtoBranchingPtr();
clusteredBranch-> colourLine(b1->colourLine());
clusteredBranch->antiColourLine(b2->colourLine());
}
else if(b2->particle()->iColour()==PDT::Colour8 &&
particle_data->iColour()==PDT::Colour3) {
if(b1->colourLine()!=b2->colourLine())
return ProtoBranchingPtr();
clusteredBranch->colourLine(b2->antiColourLine());
}
else
assert(false);
}
else if(b1->particle()->iColour()==PDT::Colour3bar) {
b1->type(ShowerPartnerType::QCDAntiColourLine);
if(b2->particle()->iColour()==PDT::Colour3bar &&
particle_data->iColour()==PDT::Colour8) {
if(b1->antiColourLine()==b2->antiColourLine())
return ProtoBranchingPtr();
clusteredBranch-> colourLine(b2->antiColourLine());
clusteredBranch->antiColourLine(b1->antiColourLine());
}
else if(b2->particle()->iColour()==PDT::Colour8 &&
particle_data->iColour()==PDT::Colour3bar) {
if(b1->antiColourLine()!=b2->antiColourLine())
return ProtoBranchingPtr();
clusteredBranch->antiColourLine(b2->colourLine());
}
else
assert(false);
}
else if(b1->particle()->iColour()==PDT::Colour8) {
if(b2->particle()->iColour()==PDT::Colour3) {
if(b1->colourLine()!=b2->colourLine())
return ProtoBranchingPtr();
clusteredBranch->antiColourLine(b1->antiColourLine());
b1->type(ShowerPartnerType::QCDColourLine);
}
else if(b2->particle()->iColour()==PDT::Colour3bar) {
if(b1->antiColourLine()!=b2->antiColourLine())
return ProtoBranchingPtr();
clusteredBranch-> colourLine(b1->colourLine());
b1->type(ShowerPartnerType::QCDAntiColourLine);
}
else if(b2->particle()->iColour()==PDT::Colour8) {
if(b1->colourLine()==b2->colourLine()) {
b1->type(ShowerPartnerType::QCDColourLine);
clusteredBranch->antiColourLine(b1->antiColourLine());
clusteredBranch->colourLine(b2->antiColourLine());
}
else if(b1->antiColourLine()==b2->antiColourLine()) {
b1->type(ShowerPartnerType::QCDAntiColourLine);
clusteredBranch-> colourLine(b1->colourLine());
clusteredBranch->antiColourLine(b2->colourLine());
}
else {
return ProtoBranchingPtr();
}
}
else
assert(false);
}
else
assert(false);
}
protoBranchings().insert(clusteredBranch);
//set children relations
// outgoing
if( !incoming ){
clusteredBranch->addChild( b1 );
clusteredBranch->addChild( b2 );
}
else {
clusteredBranch->addBackChild( b1 );
clusteredBranch->addBackChild( b2 );
}
return clusteredBranch;
}
BranchingElement PowhegShowerHandler::
allowedFinalStateBranching( tProtoBranchingPtr & b1, tProtoBranchingPtr & b2) const {
// check with normal ID's
pair< long, long > ptest = make_pair( b1->id(), b2->id() );
map< pair< long, long >, BranchingElement >::const_iterator
split = allowedFinal_.find(ptest);
if( split != allowedFinal_.end() ) {
if( split->second.particles[1]->id() != ptest.first ) swap( b1, b2 );
return split->second;
}
// check with CC
if( b1->particle()->CC() ) ptest.first *= -1;
if( b2->particle()->CC() ) ptest.second *= -1;
split = allowedFinal_.find( ptest );
if( split != allowedFinal_.end() ) {
// cc the idlist only be for qbar g clusterings
BranchingElement ccBranch = split->second;
swap(ccBranch.particles,ccBranch.conjugateParticles);
if( split->second.particles[1]->id() != ptest.first ) swap( b1, b2);
return ccBranch;
}
// not found found null pointer
return BranchingElement();
}
BranchingElement PowhegShowerHandler::allowedInitialStateBranching( tProtoBranchingPtr & b1,
tProtoBranchingPtr & b2) const {
if(b2->status()==HardBranching::Incoming) swap(b1,b2);
// is initial parton an antiparticle
bool cc = b1->id() < 0;
//gives range of allowedInitial_ with matching first abs( id )
pair< multimap< long, BranchingElement >::const_iterator,
multimap< long, BranchingElement >::const_iterator >
location = allowedInitial_.equal_range( abs( b1->id() ) );
//iterates over this range
for( multimap< long, BranchingElement >::const_iterator it = location.first;
it != location.second; ++it ) {
long idtest = cc ? it->second.conjugateParticles[2]->id() : it->second.particles[2]->id();
// does second id match the test
if( idtest == b2->id() ) return it->second;
//if the the IS parton is a gluon and charge conjugate of second parton mathes accept
if( idtest == -b2->id() &&
! b1->particle()->CC() ) return it->second;
}
// not found found null pointer
return BranchingElement();
}
bool PowhegShowerHandler::fuzzyEqual(Lorentz5Momentum a,
Lorentz5Momentum b) const{
// check momenta are within 1% of each other
if ( (a.e()==ZERO && b.e()==ZERO) || (a.e()/b.e()>0.99 && a.e()/b.e()<1.01) ){
if ((a.x()==ZERO && b.x()==ZERO) || (a.x()/b.x()>0.99 && a.x()/b.x()<1.01) ){
if ((a.y()==ZERO && b.y()==ZERO) || (a.y()/b.y()>0.99 && a.y()/b.y()<1.01) ){
if ((a.z()==ZERO && b.z()==ZERO) || (a.z()/b.z()>0.99 && a.z()/b.z()<1.01) )
return true;
}
}
}
return false;
}
void PowhegShowerHandler::doinit() {
QTildeShowerHandler::doinit();
// extract the allowed branchings
// final-state
for(BranchingList::const_iterator
it = splittingGenerator()->finalStateBranchings().begin();
it != splittingGenerator()->finalStateBranchings().end(); ++it) {
pair<long,long> prod(make_pair(it->second.particles[1]->id(),
it->second.particles[2]->id()));
allowedFinal_.insert(make_pair(prod,it->second));
swap(prod.first,prod.second);
allowedFinal_.insert(make_pair(prod,it->second));
}
// initial-state
for(BranchingList::const_iterator
it = splittingGenerator()->initialStateBranchings().begin();
it != splittingGenerator()->initialStateBranchings().end(); ++it) {
allowedInitial_.insert(make_pair(it->second.particles[0]->id(),it->second));
}
}
void PowhegShowerHandler::persistentOutput(PersistentOStream & os) const {
os << allowedInitial_ << allowedFinal_
<< subtractionIntegral_ << enforceColourConsistency_ << forcePartners_
<< decayRadiation_;
}
void PowhegShowerHandler::persistentInput(PersistentIStream & is, int) {
is >> allowedInitial_ >> allowedFinal_
>> subtractionIntegral_ >> enforceColourConsistency_ >> forcePartners_
>> decayRadiation_;
}
// Static variable needed for the type description system in ThePEG.
DescribeClass<PowhegShowerHandler,Herwig::QTildeShowerHandler>
describeHerwigPowhegShowerHandler("Herwig::PowhegShowerHandler",
"HwMatchbox.so HwMatching.so");
void PowhegShowerHandler::Init() {
static ClassDocumentation<PowhegShowerHandler> documentation
("The PowhegShowerHandler class");
static Switch<PowhegShowerHandler,bool> interfaceEnforceColourConsistency
("EnforceColourConsistency",
"Force the Born and real emission colour flows to be consistent",
&PowhegShowerHandler::enforceColourConsistency_, false, false, false);
static SwitchOption interfaceEnforceColourConsistencyYes
(interfaceEnforceColourConsistency,
"Yes",
"Enforce the consistency",
true);
static SwitchOption interfaceEnforceColourConsistencyNo
(interfaceEnforceColourConsistency,
"No",
"Don't enforce consistency",
false);
static Switch<PowhegShowerHandler,bool> interfaceForcePartners
("ForcePartners",
"Whether or not to force the partners to be those from the kinematic generation",
&PowhegShowerHandler::forcePartners_, false, false, false);
static SwitchOption interfaceForcePartnersYes
(interfaceForcePartners,
"Yes",
"Force them",
true);
static SwitchOption interfaceForcePartnersNo
(interfaceForcePartners,
"No",
"Don't force them",
false);
static Switch<PowhegShowerHandler,unsigned int> interfaceDecayRadiation
("DecayRadiation",
"Handling of radiation which is interpretted as having come from decays",
&PowhegShowerHandler::decayRadiation_, 0, false,false);
static SwitchOption interfaceDecayRadiationNotAllowed
(interfaceDecayRadiation,
"NotAllowed",
"Not allowed at all, run error will be thrown",
0);
static SwitchOption interfaceDecayRadiationVetoEvent
(interfaceDecayRadiation,
"VetoEvent",
"Veto the whole event",
1);
static SwitchOption interfaceDecayRadiationVetoRadiation
(interfaceDecayRadiation,
"VetoRadiation",
"Throw the radiation away but keep the event",
2);
}
diff --git a/Shower/QTilde/Matching/PowhegShowerHandler.h b/Shower/QTilde/Matching/PowhegShowerHandler.h
--- a/Shower/QTilde/Matching/PowhegShowerHandler.h
+++ b/Shower/QTilde/Matching/PowhegShowerHandler.h
@@ -1,298 +1,298 @@
// -*- C++ -*-
//
// PowhegShowerHandler.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_PowhegShowerHandler_H
#define HERWIG_PowhegShowerHandler_H
//
// This is the declaration of the PowhegShowerHandler class.
//
#include "Herwig/Shower/QTilde/QTildeShowerHandler.h"
#include "Herwig/MatrixElement/Matchbox/MatchboxFactory.h"
#include "Herwig/MatrixElement/HwMEBase.h"
-#include "Herwig/Shower/Core/Base/HardBranching.h"
+#include "Herwig/Shower/QTilde/Base/HardBranching.h"
#include "Herwig/Shower/QTilde/Matching/CKKWTree.h"
#include "Herwig/Shower/QTilde/Matching/ProtoTree.h"
#include "Herwig/Shower/QTilde/Matching/ProtoBranching.h"
#include "Herwig/Shower/QTilde/Matching/PotentialTree.h"
#include "ThePEG/MatrixElement/DiagramBase.fh"
#include "ThePEG/MatrixElement/MEBase.h"
#include "ThePEG/PDF/PartonExtractor.h"
-#include "Herwig/Shower/Core/Base/HardTree.h"
+#include "Herwig/Shower/QTilde/Base/HardTree.h"
// #include "Herwig/Shower/Core/SplittingFunctions/SplittingGenerator.h"
// #include "Herwig/Shower/QTilde/Base/ShowerModel.h"
// #include "ThePEG/PDF/BeamParticleData.h"
-// #include "Herwig/Shower/Core/Base/ShowerTree.h"
+// #include "Herwig/Shower/QTilde/Base/ShowerTree.h"
// #include "Herwig/Shower/Core/Base/ShowerProgenitor.fh"
// #include "Herwig/Shower/QTilde/QTildeShowerHandler.fh"
// #include "Herwig/Shower/Core/Base/Branching.h"
// #include "Herwig/Shower/QTilde/Base/ShowerVeto.h"
// #include "ThePEG/Handlers/XComb.h"
// #include "Herwig/Decay/HwDecayerBase.h"
namespace Herwig {
using namespace ThePEG;
class PowhegShowerHandler: public QTildeShowerHandler {
public:
/**
* The default constructor.
*/
PowhegShowerHandler() : subtractionIntegral_(false),
enforceColourConsistency_(false),
forcePartners_(false),
decayRadiation_(0)
{}
public:
Ptr<MatchboxFactory>::tptr Factory() const{return MatchboxFactory::currentFactory();}
/**
* Return true, if the shower handler can generate a truncated
* shower for POWHEG style events generated using Matchbox
*/
virtual bool canHandleMatchboxTrunc() const { return true; }
protected:
/**
* Generate hard emissions for CKKW etc
*/
virtual HardTreePtr generateCKKW(ShowerTreePtr tree) const;
protected:
/**
* Access to the core matrix element
*/
MEPtr matrixElement() const {return matrixElement_;}
/**
* Creates all (ordered) cluster histories and selects one.
*/
PotentialTree doClustering(tSubProPtr sub,ShowerTreePtr showerTree) const;
/**
* Access to the select tree
*/
PotentialTree & hardTree() {return hardTree_;}
const PotentialTree & hardTree() const {return hardTree_;}
/**
* Access to the select tree
*/
void hardTree(PotentialTree in) const {hardTree_ = in;}
/**
* Check if two momenta are equal within 1%
*/
bool fuzzyEqual(Lorentz5Momentum a, Lorentz5Momentum b) const;
/**
* Access to the potential branchings
*/
set<ProtoBranchingPtr> & protoBranchings() const {return protoBranchings_;}
/**
* The ProtoTrees which will become CKKWTrees
*/
set< ProtoTreePtr > & protoTrees() const {return protoTrees_;}
/**
* Recursive function to find all possible clustered trees.
* Does not produce any repeated trees.
*/
void fillProtoTrees( ProtoTreePtr , long id ) const;
/**
* Function looks to see if a cluster of the branchings already exists
* in protoBranchings_ if so returns the pointer to that protoBranching
* if not creates the hardBranchings, adds it
* to protoBranchings and returns the pointer
*/
tProtoBranchingPtr getCluster( tProtoBranchingPtr, tProtoBranchingPtr ) const;
/**
* Checks whether a ProtoTree containing the same branchings already
* exists in protoTrees_ in which case the current tree is a repeat
* and should be removed (and not recursed)
*/
bool repeatProtoTree( ProtoTreePtr currentProtoTree ) const;
/**
* Returns the branching element for an FS-FS clustering
*/
BranchingElement allowedFinalStateBranching( tProtoBranchingPtr &,
tProtoBranchingPtr &) const;
/**
* Returns the branching element for an IS-FS clustering
*/
BranchingElement allowedInitialStateBranching( tProtoBranchingPtr & ,
tProtoBranchingPtr &) const;
/**
* Returns the diagram corresponding to the (leading-order) hardTree
*/
bool checkDiagram(PotentialTree &,tcDiagPtr) const;
bool subtractionIntegral() const {return subtractionIntegral_;}
void setSubtractionIntegral(bool subInt) const { subtractionIntegral_=subInt;}
private:
/**
* The matrix element for the core process
*/
mutable MEPtr matrixElement_;
/**
* The chosen hard tree
*/
mutable PotentialTree hardTree_;
/**
* All the Protobranchings used in finding the shower histories
*/
mutable set<ProtoBranchingPtr> protoBranchings_;
/**
* The ProtoTrees which will become CKKWTrees
*/
mutable set< ProtoTreePtr > protoTrees_;
/**
* The possible shower configurations that are angular-ordered
*/
mutable vector< pair< PotentialTree, double > > hardTrees_;
/**
* Which branchings are allowed?
*/
//@{
/**
* The allowed final-state branchings
*/
mutable map<pair<long,long>,BranchingElement > allowedFinal_;
/**
* The allowed initial-state branchings
*/
mutable multimap<long, BranchingElement > allowedInitial_;
//@}
public:
/** @name Functions used by the persistent I/O system. */
//@{
/**
* Function used to write out object persistently.
* @param os the persistent output stream written to.
*/
void persistentOutput(PersistentOStream & os) const;
/**
* Function used to read in object persistently.
* @param is the persistent input stream read from.
* @param version the version number of the object when written.
*/
void persistentInput(PersistentIStream & is, int version);
//@}
/**
* The standard Init function used to initialize the interfaces.
* Called exactly once for each class by the class description system
* before the main function starts or
* when this class is dynamically loaded.
*/
static void Init();
protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const;
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const;
//@}
protected:
/** @name Standard Interfaced functions. */
//@{
/**
* Initialize this object after the setup phase before saving an
* EventGenerator to disk.
* @throws InitException if object could not be initialized properly.
*/
virtual void doinit();
//@}
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
PowhegShowerHandler & operator=(const PowhegShowerHandler &);
private:
/**
* Emitter particle from the original generation
*/
mutable int emitter_;
/**
* Spectator particle from the original generation
*/
mutable int spectator_;
/**
* Whether or not a subtraction integral
*/
mutable bool subtractionIntegral_;
/**
* Whether or not do enforce consistency of the Born and real colour flows
*/
bool enforceColourConsistency_;
/**
* Force emitter and spectator partners
*/
bool forcePartners_;
/**
* Handling of radiation in decays
*/
unsigned int decayRadiation_;
};
}
#endif /* HERWIG_PowhegShowerHandler_H */
diff --git a/Shower/QTilde/QTildeShowerHandler.cc b/Shower/QTilde/QTildeShowerHandler.cc
--- a/Shower/QTilde/QTildeShowerHandler.cc
+++ b/Shower/QTilde/QTildeShowerHandler.cc
@@ -1,3691 +1,3699 @@
// -*- C++ -*-
//
// QTildeShowerHandler.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 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 QTildeShowerHandler class.
//
#include "QTildeShowerHandler.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/RefVector.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/EventRecord/Particle.h"
#include "ThePEG/Repository/UseRandom.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/Utilities/DescribeClass.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "ThePEG/Utilities/EnumIO.h"
#include "Herwig/Shower/Core/Base/ShowerParticle.h"
#include "Herwig/PDF/MPIPDF.h"
#include "Herwig/PDF/MinBiasPDF.h"
-#include "Herwig/Shower/Core/Base/ShowerTree.h"
-#include "Herwig/Shower/Core/Base/HardTree.h"
+#include "Herwig/Shower/QTilde/Base/ShowerTree.h"
+#include "Herwig/Shower/QTilde/Base/HardTree.h"
#include "Herwig/Shower/QTilde/Base/KinematicsReconstructor.h"
#include "Herwig/Shower/QTilde/Base/PartnerFinder.h"
#include "Herwig/PDF/HwRemDecayer.h"
#include "Herwig/Shower/Core/Base/ShowerVertex.h"
#include "ThePEG/Repository/CurrentGenerator.h"
#include "Herwig/MatrixElement/Matchbox/Base/SubtractedME.h"
#include "Herwig/MatrixElement/Matchbox/MatchboxFactory.h"
#include "ThePEG/PDF/PartonExtractor.h"
#include "Herwig/Shower/RealEmissionProcess.h"
using namespace Herwig;
bool QTildeShowerHandler::_hardEmissionWarn = true;
bool QTildeShowerHandler::_missingTruncWarn = true;
QTildeShowerHandler::QTildeShowerHandler() :
_maxtry(100), _meCorrMode(1), _reconOpt(0),
_hardVetoReadOption(false),
_iptrms(ZERO), _beta(0.), _gamma(ZERO), _iptmax(),
_limitEmissions(0), _initialenhance(1.), _finalenhance(1.),
_nReWeight(100), _reWeight(false),
interaction_(ShowerInteraction::Both),
_trunc_Mode(true), _hardEmission(1),
_spinOpt(1), _softOpt(2), _hardPOWHEG(false), muPt(ZERO),
_maxTryFSR(100000), _maxFailFSR(100), _fracFSR(0.001),
_nFSR(0), _nFailedFSR(0)
{}
QTildeShowerHandler::~QTildeShowerHandler() {}
IBPtr QTildeShowerHandler::clone() const {
return new_ptr(*this);
}
IBPtr QTildeShowerHandler::fullclone() const {
return new_ptr(*this);
}
void QTildeShowerHandler::persistentOutput(PersistentOStream & os) const {
os << _model << _splittingGenerator << _maxtry
<< _meCorrMode << _hardVetoReadOption
<< _limitEmissions << _spinOpt << _softOpt << _hardPOWHEG
<< ounit(_iptrms,GeV) << _beta << ounit(_gamma,GeV) << ounit(_iptmax,GeV)
<< _vetoes << _fullShowerVetoes << _nReWeight << _reWeight
<< _trunc_Mode << _hardEmission << _reconOpt
<< ounit(muPt,GeV)
<< oenum(interaction_) << _maxTryFSR << _maxFailFSR << _fracFSR;
}
void QTildeShowerHandler::persistentInput(PersistentIStream & is, int) {
is >> _model >> _splittingGenerator >> _maxtry
>> _meCorrMode >> _hardVetoReadOption
>> _limitEmissions >> _spinOpt >> _softOpt >> _hardPOWHEG
>> iunit(_iptrms,GeV) >> _beta >> iunit(_gamma,GeV) >> iunit(_iptmax,GeV)
>> _vetoes >> _fullShowerVetoes >> _nReWeight >> _reWeight
>> _trunc_Mode >> _hardEmission >> _reconOpt
>> iunit(muPt,GeV)
>> ienum(interaction_) >> _maxTryFSR >> _maxFailFSR >> _fracFSR;
}
// The following static variable is needed for the type
// description system in ThePEG.
DescribeClass<QTildeShowerHandler,ShowerHandler>
describeHerwigQTildeShowerHandler("Herwig::QTildeShowerHandler", "HwShower.so");
void QTildeShowerHandler::Init() {
static ClassDocumentation<QTildeShowerHandler> documentation
("TheQTildeShowerHandler class is the main class"
" for the angular-ordered parton shower",
"The Shower evolution was performed using an algorithm described in "
"\\cite{Marchesini:1983bm,Marchesini:1987cf,Gieseke:2003rz,Bahr:2008pv}.",
"%\\cite{Marchesini:1983bm}\n"
"\\bibitem{Marchesini:1983bm}\n"
" G.~Marchesini and B.~R.~Webber,\n"
" ``Simulation Of QCD Jets Including Soft Gluon Interference,''\n"
" Nucl.\\ Phys.\\ B {\\bf 238}, 1 (1984).\n"
" %%CITATION = NUPHA,B238,1;%%\n"
"%\\cite{Marchesini:1987cf}\n"
"\\bibitem{Marchesini:1987cf}\n"
" G.~Marchesini and B.~R.~Webber,\n"
" ``Monte Carlo Simulation of General Hard Processes with Coherent QCD\n"
" Radiation,''\n"
" Nucl.\\ Phys.\\ B {\\bf 310}, 461 (1988).\n"
" %%CITATION = NUPHA,B310,461;%%\n"
"%\\cite{Gieseke:2003rz}\n"
"\\bibitem{Gieseke:2003rz}\n"
" S.~Gieseke, P.~Stephens and B.~Webber,\n"
" ``New formalism for QCD parton showers,''\n"
" JHEP {\\bf 0312}, 045 (2003)\n"
" [arXiv:hep-ph/0310083].\n"
" %%CITATION = JHEPA,0312,045;%%\n"
);
static Reference<QTildeShowerHandler,SplittingGenerator>
interfaceSplitGen("SplittingGenerator",
"A reference to the SplittingGenerator object",
&Herwig::QTildeShowerHandler::_splittingGenerator,
false, false, true, false);
static Reference<QTildeShowerHandler,ShowerModel> interfaceShowerModel
("ShowerModel",
"The pointer to the object which defines the shower evolution model.",
&QTildeShowerHandler::_model, false, false, true, false, false);
static Parameter<QTildeShowerHandler,unsigned int> interfaceMaxTry
("MaxTry",
"The maximum number of attempts to generate the shower from a"
" particular ShowerTree",
&QTildeShowerHandler::_maxtry, 100, 1, 100000,
false, false, Interface::limited);
static Parameter<QTildeShowerHandler,unsigned int> interfaceNReWeight
("NReWeight",
"The number of attempts for the shower when reweighting",
&QTildeShowerHandler::_nReWeight, 100, 10, 10000,
false, false, Interface::limited);
static Switch<QTildeShowerHandler, unsigned int> ifaceMECorrMode
("MECorrMode",
"Choice of the ME Correction Mode",
&QTildeShowerHandler::_meCorrMode, 1, false, false);
static SwitchOption on
(ifaceMECorrMode,"HardPlusSoft","hard+soft on", 1);
static SwitchOption hard
(ifaceMECorrMode,"Hard","only hard on", 2);
static SwitchOption soft
(ifaceMECorrMode,"Soft","only soft on", 3);
static Switch<QTildeShowerHandler, bool> ifaceHardVetoReadOption
("HardVetoReadOption",
"Apply read-in scale veto to all collisions or just the primary one?",
&QTildeShowerHandler::_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<QTildeShowerHandler, Energy> ifaceiptrms
("IntrinsicPtGaussian",
"RMS of intrinsic pT of Gaussian distribution:\n"
"2*(1-Beta)*exp(-sqr(intrinsicpT/RMS))/sqr(RMS)",
&QTildeShowerHandler::_iptrms, GeV, ZERO, ZERO, 1000000.0*GeV,
false, false, Interface::limited);
static Parameter<QTildeShowerHandler, double> ifacebeta
("IntrinsicPtBeta",
"Proportion of inverse quadratic distribution in generating intrinsic pT.\n"
"(1-Beta) is the proportion of Gaussian distribution",
&QTildeShowerHandler::_beta, 0, 0, 1,
false, false, Interface::limited);
static Parameter<QTildeShowerHandler, Energy> ifacegamma
("IntrinsicPtGamma",
"Parameter for inverse quadratic:\n"
"2*Beta*Gamma/(sqr(Gamma)+sqr(intrinsicpT))",
&QTildeShowerHandler::_gamma,GeV, ZERO, ZERO, 100000.0*GeV,
false, false, Interface::limited);
static Parameter<QTildeShowerHandler, Energy> ifaceiptmax
("IntrinsicPtIptmax",
"Upper bound on intrinsic pT for inverse quadratic",
&QTildeShowerHandler::_iptmax,GeV, ZERO, ZERO, 100000.0*GeV,
false, false, Interface::limited);
static RefVector<QTildeShowerHandler,ShowerVeto> ifaceVetoes
("Vetoes",
"The vetoes to be checked during showering",
&QTildeShowerHandler::_vetoes, -1,
false,false,true,true,false);
static RefVector<QTildeShowerHandler,FullShowerVeto> interfaceFullShowerVetoes
("FullShowerVetoes",
"The vetos to be appliede on the full final state of the shower",
&QTildeShowerHandler::_fullShowerVetoes, -1, false, false, true, false, false);
static Switch<QTildeShowerHandler,unsigned int> interfaceLimitEmissions
("LimitEmissions",
"Limit the number and type of emissions for testing",
&QTildeShowerHandler::_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<QTildeShowerHandler,bool> interfaceTruncMode
("TruncatedShower", "Include the truncated shower?",
&QTildeShowerHandler::_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<QTildeShowerHandler,int> interfaceHardEmission
("HardEmission",
"Whether to use ME corrections or POWHEG for the hardest emission",
&QTildeShowerHandler::_hardEmission, 0, false, false);
static SwitchOption interfaceHardEmissionNone
(interfaceHardEmission,
"None",
"No Corrections",
0);
static SwitchOption interfaceHardEmissionMECorrection
(interfaceHardEmission,
"MECorrection",
"Old fashioned ME correction",
1);
static SwitchOption interfaceHardEmissionPOWHEG
(interfaceHardEmission,
"POWHEG",
"Powheg style hard emission",
2);
static Switch<QTildeShowerHandler,ShowerInteraction> interfaceInteractions
("Interactions",
"The interactions to be used in the shower",
&QTildeShowerHandler::interaction_, ShowerInteraction::Both, false, false);
static SwitchOption interfaceInteractionsQCD
(interfaceInteractions,
"QCD",
"Only QCD radiation",
ShowerInteraction::QCD);
static SwitchOption interfaceInteractionsQED
(interfaceInteractions,
"QED",
"Only QEd radiation",
ShowerInteraction::QED);
static SwitchOption interfaceInteractionsQCDandQED
(interfaceInteractions,
"QCDandQED",
"Both QED and QCD radiation",
ShowerInteraction::Both);
static Switch<QTildeShowerHandler,unsigned int> interfaceReconstructionOption
("ReconstructionOption",
"Treatment of the reconstruction of the transverse momentum of "
"a branching from the evolution scale.",
&QTildeShowerHandler::_reconOpt, 0, false, false);
static SwitchOption interfaceReconstructionOptionCutOff
(interfaceReconstructionOption,
"CutOff",
"Use the cut-off masses in the calculation",
0);
static SwitchOption interfaceReconstructionOptionOffShell
(interfaceReconstructionOption,
"OffShell",
"Use the off-shell masses in the calculation veto the emission of the parent,"
" no veto in generation of emissions from children",
1);
static SwitchOption interfaceReconstructionOptionOffShell2
(interfaceReconstructionOption,
"OffShell2",
"Use the off-shell masses in the calculation veto the emissions from the children."
" no veto in generation of emissions from children",
2);
static SwitchOption interfaceReconstructionOptionOffShell3
(interfaceReconstructionOption,
"OffShell3",
"Use the off-shell masses in the calculation veto the emissions from the children."
" veto in generation of emissions from children using cut-off for second parton",
3);
static SwitchOption interfaceReconstructionOptionOffShell4
(interfaceReconstructionOption,
"OffShell4",
"As OffShell3 but with a restriction on the mass of final-state"
" jets produced via backward evolution.",
4);
static SwitchOption interfaceReconstructionOptionOffShell5
(interfaceReconstructionOption,
"OffShell5",
"Try and preserve q2 but if pt negative just zero it",
5);
static Switch<QTildeShowerHandler,unsigned int> interfaceSpinCorrelations
("SpinCorrelations",
"Treatment of spin correlations in the parton shower",
&QTildeShowerHandler::_spinOpt, 1, false, false);
static SwitchOption interfaceSpinCorrelationsNo
(interfaceSpinCorrelations,
"No",
"No spin correlations",
0);
static SwitchOption interfaceSpinCorrelationsSpin
(interfaceSpinCorrelations,
"Yes",
"Include the azimuthal spin correlations only",
1);
static Switch<QTildeShowerHandler,unsigned int> interfaceSoftCorrelations
("SoftCorrelations",
"Option for the treatment of soft correlations in the parton shower",
&QTildeShowerHandler::_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<QTildeShowerHandler,bool> interfaceHardPOWHEG
("HardPOWHEG",
"Treatment of powheg emissions which are too hard to have a shower interpretation",
&QTildeShowerHandler::_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<QTildeShowerHandler,unsigned int> interfaceMaxTryFSR
("MaxTryFSR",
"The maximum number of attempted FSR emissions in"
" the generation of the FSR",
&QTildeShowerHandler::_maxTryFSR, 100000, 10, 100000000,
false, false, Interface::limited);
static Parameter<QTildeShowerHandler,unsigned int> interfaceMaxFailFSR
("MaxFailFSR",
"Maximum number of failures generating the FSR",
&QTildeShowerHandler::_maxFailFSR, 100, 1, 100000000,
false, false, Interface::limited);
static Parameter<QTildeShowerHandler,double> interfaceFSRFailureFraction
("FSRFailureFraction",
"Maximum fraction of events allowed to fail due to too many FSR emissions",
&QTildeShowerHandler::_fracFSR, 0.001, 1e-10, 1,
false, false, Interface::limited);
}
tPPair QTildeShowerHandler::cascade(tSubProPtr sub,
XCPtr xcomb) {
// use me for reference in tex file etc
useMe();
prepareCascade(sub);
// set things up in the base class
resetWeights();
hard_=ShowerTreePtr();
decay_.clear();
done_.clear();
// check if anything needs doing
if ( !doFSR() && ! doISR() )
return sub->incoming();
// start of the try block for the whole showering process
unsigned int countFailures=0;
while (countFailures<maxtry()) {
try {
decay_.clear();
done_.clear();
PerturbativeProcessPtr hard;
DecayProcessMap decay;
splitHardProcess(firstInteraction() ? tagged() :
tPVector(currentSubProcess()->outgoing().begin(),
currentSubProcess()->outgoing().end()),
hard,decay);
ShowerTree::constructTrees(hard_,decay_,hard,decay);
// if no hard process
if(!hard_) throw Exception() << "Shower starting with a decay"
<< "is not implemented"
<< Exception::runerror;
// perform the shower for the hard process
showerHardProcess(hard_,xcomb);
done_.push_back(hard_);
hard_->updateAfterShower(decay_);
// if no decaying particles to shower break out of the loop
if(decay_.empty()) break;
// shower the decay products
while(!decay_.empty()) {
// find particle whose production process has been showered
ShowerDecayMap::iterator dit = decay_.begin();
while(!dit->second->parent()->hasShowered() && dit!=decay_.end()) ++dit;
assert(dit!=decay_.end());
// get the particle
ShowerTreePtr decayingTree = dit->second;
// remove it from the multimap
decay_.erase(dit);
// make sure the particle has been decayed
QTildeShowerHandler::decay(decayingTree,decay_);
// now shower the decay
showerDecay(decayingTree);
done_.push_back(decayingTree);
decayingTree->updateAfterShower(decay_);
}
// suceeded break out of the loop
break;
}
catch (KinematicsReconstructionVeto) {
resetWeights();
++countFailures;
}
catch ( ... ) {
hard_=ShowerTreePtr();
decay_.clear();
done_.clear();
throw;
}
}
// if loop exited because of too many tries, throw event away
if (countFailures >= maxtry()) {
resetWeights();
hard_=ShowerTreePtr();
decay_.clear();
done_.clear();
throw Exception() << "Too many tries for main while loop "
<< "in QTildeShowerHandler::cascade()."
<< Exception::eventerror;
}
//enter the particles in the event record
fillEventRecord();
// clear storage
hard_=ShowerTreePtr();
decay_.clear();
done_.clear();
// non hadronic case return
if (!isResolvedHadron(incomingBeams().first ) &&
!isResolvedHadron(incomingBeams().second) )
return incomingBeams();
// remake the remnants (needs to be after the colours are sorted
// out in the insertion into the event record)
if ( firstInteraction() ) return remakeRemnant(sub->incoming());
//Return the new pair of incoming partons. remakeRemnant is not
//necessary here, because the secondary interactions are not yet
//connected to the remnants.
return make_pair(findFirstParton(sub->incoming().first ),
findFirstParton(sub->incoming().second));
}
void QTildeShowerHandler::fillEventRecord() {
// create a new step
StepPtr pstep = newStep();
assert(!done_.empty());
assert(done_[0]->isHard());
// insert the steps
for(unsigned int ix=0;ix<done_.size();++ix) {
done_[ix]->fillEventRecord(pstep,doISR(),doFSR());
}
}
HardTreePtr QTildeShowerHandler::generateCKKW(ShowerTreePtr ) const {
return HardTreePtr();
}
void QTildeShowerHandler::doinit() {
ShowerHandler::doinit();
// interactions may have been changed through a setup file so we
// clear it up here
// 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;
}
+ ShowerTree::_vmin2 = vMin();
+ ShowerTree::_spaceTime = includeSpaceTime();
}
+void QTildeShowerHandler::doinitrun() {
+ ShowerHandler::doinitrun();
+ ShowerTree::_vmin2 = vMin();
+ ShowerTree::_spaceTime = includeSpaceTime();
+}
+
void QTildeShowerHandler::generateIntrinsicpT(vector<ShowerProgenitorPtr> particlesToShower) {
_intrinsic.clear();
if ( !ipTon() || !doISR() ) return;
// don't do anything for the moment for secondary scatters
if( !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 QTildeShowerHandler::setupMaximumScales(const vector<ShowerProgenitorPtr> & p,
XCPtr xcomb) {
// let POWHEG events radiate freely
if(_hardEmission==2&&hardTree()) {
vector<ShowerProgenitorPtr>::const_iterator ckt = p.begin();
for (; ckt != p.end(); ckt++) (*ckt)->maxHardPt(Constants::MaxEnergy);
return;
}
// return if no vetos
if (!restrictPhasespace()) 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 ( !hardScaleIsMuF() || (hardVetoReadOption()&&!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(hardScaleIsMuF()&&hardVetoReadOption()&&
!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 *= 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 QTildeShowerHandler::setupHardScales(const vector<ShowerProgenitorPtr> & p,
XCPtr xcomb) {
if ( hardScaleIsMuF() &&
(!hardVetoReadOption() || firstInteraction()) ) {
Energy hardScale = ZERO;
if(currentTree()->isHard()) {
assert(xcomb);
hardScale = sqrt( xcomb->lastShowerScale() );
}
else {
hardScale = currentTree()->incomingLines().begin()->first
->progenitor()->momentum().mass();
}
hardScale *= hardScaleFactor();
vector<ShowerProgenitorPtr>::const_iterator ckt = p.begin();
for (; ckt != p.end(); ckt++) (*ckt)->hardScale(hardScale);
muPt = hardScale;
}
}
void QTildeShowerHandler::showerHardProcess(ShowerTreePtr hard, XCPtr xcomb) {
_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());
// work out the type of event
currentTree()->xcombPtr(dynamic_ptr_cast<StdXCombPtr>(xcomb));
currentTree()->identifyEventType();
checkFlags();
// generate the showering
doShowering(true,xcomb);
}
RealEmissionProcessPtr QTildeShowerHandler::hardMatrixElementCorrection(bool hard) {
// set the initial enhancement factors for the soft correction
_initialenhance = 1.;
_finalenhance = 1.;
// see if we can get the correction from the matrix element
// or decayer
RealEmissionProcessPtr real;
if(hard) {
if(_hardme&&_hardme->hasMECorrection()) {
_hardme->initializeMECorrection(_currenttree->perturbativeProcess(),
_initialenhance,_finalenhance);
if(hardMEC())
real =
_hardme->applyHardMatrixElementCorrection(_currenttree->perturbativeProcess());
}
}
else {
if(_decayme&&_decayme->hasMECorrection()) {
_decayme->initializeMECorrection(_currenttree->perturbativeProcess(),
_initialenhance,_finalenhance);
if(hardMEC())
real = _decayme->applyHardMatrixElementCorrection(_currenttree->perturbativeProcess());
}
}
return real;
}
ShowerParticleVector QTildeShowerHandler::createTimeLikeChildren(tShowerParticlePtr, 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
ShowerParticleVector children;
for(unsigned int ix=0;ix<2;++ix) {
children.push_back(new_ptr(ShowerParticle(ids[ix+1],true)));
if(children[ix]->id()==_progenitor->id()&&!ids[ix+1]->stable())
children[ix]->set5Momentum(Lorentz5Momentum(_progenitor->progenitor()->mass()));
else
children[ix]->set5Momentum(Lorentz5Momentum(ids[ix+1]->mass()));
}
return children;
}
bool QTildeShowerHandler::timeLikeShower(tShowerParticlePtr particle,
ShowerInteraction 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"
<< "QTildeShowerHandler::timeLikeShower(). Terminating run\n"
<< Exception::runerror;
throw Exception() << "Too many attempted emissions in QTildeShowerHandler::timeLikeShower()\n"
<< Exception::eventerror;
}
// generate the emission
ShowerParticleVector children;
int ntry=0;
// generate the emission
if(!fb.kinematics)
fb = selectTimeLikeBranching(particle,type,HardBranchingPtr());
// no emission, return
if(!fb.kinematics) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
fc[0] = Branching();
fc[1] = Branching();
++ntry;
assert(fb.kinematics);
// has emitted
// Assign the shower kinematics to the emitting particle.
if(setupChildren) {
++_nFSR;
particle->showerKinematics(fb.kinematics);
// check highest pT
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// create the children
children = createTimeLikeChildren(particle,fb.ids);
// update the children
particle->showerKinematics()->
updateChildren(particle, children,fb.type,_reconOpt==3 || _reconOpt==4);
// update number of emissions
++_nfs;
if(_limitEmissions!=0) {
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
setupChildren = false;
}
// select branchings for children
fc[0] = selectTimeLikeBranching(children[0],type,HardBranchingPtr());
fc[1] = selectTimeLikeBranching(children[1],type,HardBranchingPtr());
// old default
if(_reconOpt==0||_reconOpt==5) {
break;
}
// all other options
else {
// 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]->id()!=ParticleID::g) q2 += sqr(vm[0]);
masses[ix+1] = sqrt(q2);
}
else {
masses[ix+1] = virtualMasses[ix+1];
}
}
masses[0] = fb.ids[0]->id()!=ParticleID::g ? virtualMasses[0] : ZERO;
double z = fb.kinematics->z();
Energy2 pt2 = z*(1.-z)*(z*(1.-z)*sqr(fb.kinematics->scale()) + sqr(masses[0]))
- sqr(masses[1])*(1.-z) - sqr(masses[2])*z;
if(pt2>=ZERO) break;
// clean up the vetoed emission
if(_reconOpt==1) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectTimeLikeBranching(particle,type,HardBranchingPtr());
// no emission, return
if(!fb.kinematics) {
if(particle->spinInfo()) particle->spinInfo()->develop();
return false;
}
setupChildren = true;
continue;
}
// clean up vetoed children
else if(_reconOpt>=2) {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics)
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
children[ix]->virtualMass(ZERO);
}
}
}
};
// 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();
if(_reconOpt>=1)
particle->showerKinematics()->updateParent(particle, children,fb.type);
// branching has happened
if(first&&!children.empty())
particle->showerKinematics()->resetChildren(particle,children);
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
bool
QTildeShowerHandler::spaceLikeShower(tShowerParticlePtr particle, PPtr beam,
ShowerInteraction 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(firstPDF().particle() == _beam)
pdf = firstPDF().pdf();
if(secondPDF().particle() == _beam)
pdf = secondPDF().pdf();
Energy freeze = 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]={bb.ids[0],bb.ids[2]};
// 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,_reconOpt>=4);
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 QTildeShowerHandler::showerDecay(ShowerTreePtr decay) {
// work out the type of event
currentTree()->xcombPtr(StdXCombPtr());
currentTree()->identifyEventType();
_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());
// 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();
}
}
bool QTildeShowerHandler::spaceLikeDecayShower(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minmass,ShowerInteraction type,
Branching fb) {
// too many tries
if(_nFSR>=_maxTryFSR) {
++_nFailedFSR;
// too many failed events
if(_nFailedFSR>=_maxFailFSR)
throw Exception() << "Too many events have failed due to too many shower emissions, in\n"
<< "QTildeShowerHandler::timeLikeShower(). Terminating run\n"
<< Exception::runerror;
throw Exception() << "Too many attempted emissions in QTildeShowerHandler::timeLikeShower()\n"
<< Exception::eventerror;
}
// generate the emission
ShowerParticleVector children;
int ntry=0;
// generate the emission
if(!fb.kinematics)
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,
HardBranchingPtr());
// no emission, return
if(!fb.kinematics) return false;
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
if(particle->virtualMass()==ZERO)
particle->virtualMass(_progenitor->progenitor()->mass());
fc[0] = Branching();
fc[1] = Branching();
++ntry;
assert(fb.kinematics);
// has emitted
// Assign the shower kinematics to the emitting particle.
if(setupChildren) {
++_nFSR;
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// create the ShowerParticle objects for the two children
children = createTimeLikeChildren(particle,fb.ids);
// updateChildren the children
particle->showerKinematics()->
updateChildren(particle, children, fb.type,_reconOpt>=3);
setupChildren = false;
}
// select branchings for children
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,
type,HardBranchingPtr());
fc[1] = selectTimeLikeBranching (children[1],type,HardBranchingPtr());
// old default
if(_reconOpt==0) {
// shower the first particle
_currenttree->updateInitialStateShowerProduct(_progenitor,children[0]);
_currenttree->addInitialStateBranching(particle,children[0],children[1]);
if(fc[0].kinematics) spaceLikeDecayShower(children[0],maxScales,minmass,type,Branching());
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],true);
updateHistory(children[1]);
// branching has happened
break;
}
// Herwig default
else if(_reconOpt==1) {
// shower the first particle
_currenttree->updateInitialStateShowerProduct(_progenitor,children[0]);
_currenttree->addInitialStateBranching(particle,children[0],children[1]);
if(fc[0].kinematics) spaceLikeDecayShower(children[0],maxScales,minmass,type,Branching());
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],true);
updateHistory(children[1]);
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,
HardBranchingPtr());
// no emission, return
if(!fb.kinematics) {
return false;
}
setupChildren = true;
continue;
}
else
break;
}
else if(_reconOpt>=2) {
// cut-off masses for the branching
const vector<Energy> & virtualMasses = fb.sudakov->virtualMasses(fb.ids);
// compute the masses of the children
Energy masses[3];
// space-like children
masses[1] = children[0]->virtualMass();
// time-like child
if(fc[1].kinematics) {
const vector<Energy> & vm = fc[1].sudakov->virtualMasses(fc[1].ids);
Energy2 q2 =
fc[1].kinematics->z()*(1.-fc[1].kinematics->z())*sqr(fc[1].kinematics->scale());
if(fc[1].ids[0]->id()!=ParticleID::g) q2 += sqr(vm[0]);
masses[2] = sqrt(q2);
}
else {
masses[2] = virtualMasses[2];
}
masses[0]=particle->virtualMass();
double z = fb.kinematics->z();
Energy2 pt2 = (1.-z)*(z*sqr(masses[0])-sqr(masses[1])-z/(1.-z)*sqr(masses[2]));
if(pt2>=ZERO) {
break;
}
else {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics)
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else {
if(ix==0)
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,Constants::MaxEnergy);
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
}
}
children[0]->virtualMass(_progenitor->progenitor()->mass());
children[1]->virtualMass(ZERO);
}
}
};
if(_reconOpt>=2) {
// In the case of splittings which involves coloured particles,
// set properly the colour flow of the branching.
// update the history if needed
_currenttree->updateInitialStateShowerProduct(_progenitor,children[0]);
_currenttree->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) spaceLikeDecayShower(children[0],maxScales,minmass,type,Branching());
// shower the second particle
if(fc[1].kinematics) timeLikeShower(children[1],type,fc[1],true);
updateHistory(children[1]);
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
}
// branching has happened
return true;
}
vector<ShowerProgenitorPtr> QTildeShowerHandler::setupShower(bool hard) {
RealEmissionProcessPtr real;
// generate hard me if needed
if(_hardEmission==1) {
real = hardMatrixElementCorrection(hard);
if(real&&!real->outgoing().empty()) setupMECorrection(real);
}
// generate POWHEG hard emission if needed
else if(_hardEmission==2)
hardestEmission(hard);
// set the initial colour partners
setEvolutionPartners(hard,interaction_,false);
// get the particles to be showered
vector<ShowerProgenitorPtr> particlesToShower =
currentTree()->extractProgenitors();
// return the answer
return particlesToShower;
}
void QTildeShowerHandler::setEvolutionPartners(bool hard,ShowerInteraction type,
bool clear) {
// match the particles in the ShowerTree and hardTree
if(hardTree() && !hardTree()->connect(currentTree()))
throw Exception() << "Can't match trees in "
<< "QTildeShowerHandler::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) {
tShowerParticlePtr partner = hardTree()->particles()[particles[ix]]->branchingParticle()->partner();
if(!partner) continue;
for(map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
it=hardTree()->particles().begin();
it!=hardTree()->particles().end();++it) {
if(it->second->branchingParticle()==partner) {
particles[ix]->partner(it->first);
break;
}
}
if(!particles[ix]->partner())
throw Exception() << "Can't match partners in "
<< "QTildeShowerHandler::setEvolutionPartners()"
<< Exception::eventerror;
}
}
// Set the initial evolution scales
showerModel()->partnerFinder()->
setInitialEvolutionScales(particles,!hard,interaction_,!_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(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 QTildeShowerHandler::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 QTildeShowerHandler::startTimeLikeShower(ShowerInteraction type) {
_nFSR = 0;
// initialize basis vectors etc
if(!progenitor()->progenitor()->partner()) return false;
progenitor()->progenitor()->initializeFinalState();
if(hardTree()) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit=hardTree()->particles().end(),
mit = hardTree()->particles().find(progenitor()->progenitor());
if( mit != eit && !mit->second->children().empty() ) {
bool output=truncatedTimeLikeShower(progenitor()->progenitor(),
mit->second ,type,Branching(),true);
if(output) updateHistory(progenitor()->progenitor());
return output;
}
}
// do the shower
bool output = hardOnly() ? false :
timeLikeShower(progenitor()->progenitor() ,type,Branching(),true) ;
if(output) updateHistory(progenitor()->progenitor());
return output;
}
bool QTildeShowerHandler::startSpaceLikeShower(PPtr parent, ShowerInteraction type) {
// initialise the basis vectors
if(!progenitor()->progenitor()->partner()) return false;
progenitor()->progenitor()->initializeInitialState(parent);
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 );
}
}
// perform the shower
return hardOnly() ? false :
spaceLikeShower(progenitor()->progenitor(),parent,type);
}
bool QTildeShowerHandler::
startSpaceLikeDecayShower(const ShowerParticle::EvolutionScales & maxScales,
Energy minimumMass,ShowerInteraction type) {
_nFSR = 0;
// set up the particle basis vectors
if(!progenitor()->progenitor()->partner()) return false;
progenitor()->progenitor()->initializeDecay();
if(hardTree()) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
eit =hardTree()->particles().end(),
mit = hardTree()->particles().find(progenitor()->progenitor());
if( mit != eit && mit->second->parent() ) {
HardBranchingPtr branch=mit->second;
while(branch->parent()) branch=branch->parent();
return truncatedSpaceLikeDecayShower(progenitor()->progenitor(),maxScales,
minimumMass, branch ,type, Branching());
}
}
// perform the shower
return hardOnly() ? false :
spaceLikeDecayShower(progenitor()->progenitor(),maxScales,minimumMass,type,Branching());
}
bool QTildeShowerHandler::timeLikeVetoed(const Branching & fb,
ShowerParticlePtr particle) {
// work out type of interaction
ShowerInteraction type = convertInteraction(fb.type);
// check whether emission was harder than largest pt of hard subprocess
if ( restrictPhasespace() && 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,currentTree());
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 ( firstInteraction() &&
profileScales() ) {
double weight =
profileScales()->
hardScaleProfile(_progenitor->hardScale(),fb.kinematics->pT());
if ( UseRandom::rnd() > weight )
return true;
}
return false;
}
bool QTildeShowerHandler::spaceLikeVetoed(const Branching & bb,
ShowerParticlePtr particle) {
// work out type of interaction
ShowerInteraction type = convertInteraction(bb.type);
// check whether emission was harder than largest pt of hard subprocess
if (restrictPhasespace() && 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,currentTree());
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 ( firstInteraction() &&
profileScales() ) {
double weight =
profileScales()->
hardScaleProfile(_progenitor->hardScale(),bb.kinematics->pT());
if ( UseRandom::rnd() > weight )
return true;
}
return false;
}
bool QTildeShowerHandler::spaceLikeDecayVetoed( const Branching & fb,
ShowerParticlePtr particle) {
// work out type of interaction
ShowerInteraction type = convertInteraction(fb.type);
// 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,currentTree());
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 QTildeShowerHandler::hardestEmission(bool hard) {
HardTreePtr ISRTree;
// internal POWHEG in production or decay
if( (( _hardme && _hardme->hasPOWHEGCorrection()!=0 ) ||
( _decayme && _decayme->hasPOWHEGCorrection()!=0 ) ) ) {
RealEmissionProcessPtr real;
unsigned int type(0);
// production
if(_hardme) {
assert(hard);
real = _hardme->generateHardest( currentTree()->perturbativeProcess(),
interaction_);
type = _hardme->hasPOWHEGCorrection();
}
// decay
else {
assert(!hard);
real = _decayme->generateHardest( currentTree()->perturbativeProcess() );
type = _decayme->hasPOWHEGCorrection();
}
if(real) {
// set up ther hard tree
if(!real->outgoing().empty()) _hardtree = new_ptr(HardTree(real));
// set up the vetos
currentTree()->setVetoes(real->pT(),type);
}
// store initial state POWHEG radiation
if(_hardtree && _hardme && _hardme->hasPOWHEGCorrection()==1)
ISRTree = _hardtree;
}
else if (hard) {
// Get minimum pT cutoff used in shower approximation
Energy maxpt = 1.*GeV;
if ( currentTree()->showerApproximation() ) {
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;
}
for( map< ShowerProgenitorPtr, ShowerParticlePtr >::iterator it
= currentTree()->incomingLines().begin();
it != currentTree()->incomingLines().end(); ++it ) {
if( it->second->coloured() ) ++colouredIn;
}
if ( currentTree()->showerApproximation()->ffPtCut() == currentTree()->showerApproximation()->fiPtCut() &&
currentTree()->showerApproximation()->ffPtCut() == currentTree()->showerApproximation()->iiPtCut() )
maxpt = currentTree()->showerApproximation()->ffPtCut();
else if ( colouredIn == 2 && colouredOut == 0 )
maxpt = currentTree()->showerApproximation()->iiPtCut();
else if ( colouredIn == 0 && colouredOut > 1 )
maxpt = currentTree()->showerApproximation()->ffPtCut();
else if ( colouredIn == 2 && colouredOut == 1 )
maxpt = min(currentTree()->showerApproximation()->iiPtCut(), currentTree()->showerApproximation()->fiPtCut());
else if ( colouredIn == 1 && colouredOut > 1 )
maxpt = min(currentTree()->showerApproximation()->ffPtCut(), currentTree()->showerApproximation()->fiPtCut());
else
maxpt = min(min(currentTree()->showerApproximation()->iiPtCut(), currentTree()->showerApproximation()->fiPtCut()),
currentTree()->showerApproximation()->ffPtCut());
}
// Generate hardtree from born and real emission subprocesses
_hardtree = 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(lastXCombPtr()->lastShowerScale()),maxpt);
// set maximum pT for subsequent emissions from S events
if ( currentTree()->isPowhegSEvent() ) {
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 = generateCKKW(currentTree());
// if hard me doesn't have a FSR powheg
// correction use decay powheg correction
if (_hardme && _hardme->hasPOWHEGCorrection()<2) {
addFSRUsingDecayPOWHEG(ISRTree);
}
// connect the trees
if(_hardtree) {
connectTrees(currentTree(),_hardtree,hard);
}
}
void QTildeShowerHandler::addFSRUsingDecayPOWHEG(HardTreePtr ISRTree) {
// 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) {
return;
}
// ignore cases where outgoing particles are not coloured
map<ShowerProgenitorPtr, tShowerParticlePtr > out = currentTree()->outgoingLines();
if (out.size() != 2 ||
out. begin()->second->dataPtr()->iColour()==PDT::Colour0 ||
out.rbegin()->second->dataPtr()->iColour()==PDT::Colour0) {
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) {
return;
}
// generate the hardest emission
// create RealEmissionProcess
PPtr in = new_ptr(*inter[0]);
RealEmissionProcessPtr newProcess(new_ptr(RealEmissionProcess()));
newProcess->bornIncoming().push_back(in);
newProcess->bornOutgoing().push_back(out.begin ()->first->progenitor());
newProcess->bornOutgoing().push_back(out.rbegin()->first->progenitor());
// generate the FSR
newProcess = decayer->generateHardest(newProcess);
HardTreePtr FSRTree;
if(newProcess) {
// set up ther hard tree
if(!newProcess->outgoing().empty()) FSRTree = new_ptr(HardTree(newProcess));
// set up the vetos
currentTree()->setVetoes(newProcess->pT(),2);
}
if(!FSRTree) 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;
}
}
bool QTildeShowerHandler::truncatedTimeLikeShower(tShowerParticlePtr particle,
HardBranchingPtr branch,
ShowerInteraction type,
Branching fb, bool first) {
// select a branching if we don't have one
if(!fb.kinematics)
fb = selectTimeLikeBranching(particle,type,branch);
// must be an emission, the forced one it not a truncated one
assert(fb.kinematics);
ShowerParticleVector children;
int ntry=0;
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
if(!fc[0].hard) fc[0] = Branching();
if(!fc[1].hard) fc[1] = Branching();
++ntry;
// Assign the shower kinematics to the emitting particle.
if(setupChildren) {
++_nFSR;
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// create the children
children = createTimeLikeChildren(particle,fb.ids);
// update the children
particle->showerKinematics()->
updateChildren(particle, children,fb.type,_reconOpt>=3);
setupChildren = false;
}
// select branchings for children
if(!fc[0].kinematics) {
// select branching for first particle
if(!fb.hard && fb.iout ==1 )
fc[0] = selectTimeLikeBranching(children[0],type,branch);
else if(fb.hard && !branch->children()[0]->children().empty() )
fc[0] = selectTimeLikeBranching(children[0],type,branch->children()[0]);
else
fc[0] = selectTimeLikeBranching(children[0],type,HardBranchingPtr());
}
// select branching for the second particle
if(!fc[1].kinematics) {
// select branching for first particle
if(!fb.hard && fb.iout ==2 )
fc[1] = selectTimeLikeBranching(children[1],type,branch);
else if(fb.hard && !branch->children()[1]->children().empty() )
fc[1] = selectTimeLikeBranching(children[1],type,branch->children()[1]);
else
fc[1] = selectTimeLikeBranching(children[1],type,HardBranchingPtr());
}
// old default
if(_reconOpt==0 || (_reconOpt==1 && fb.hard) ) {
// shower the first particle
if(fc[0].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 1)
truncatedTimeLikeShower(children[0],branch,type,fc[0],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 2)
truncatedTimeLikeShower(children[1],branch,type,fc[1],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[1]->children().empty() )
truncatedTimeLikeShower(children[1],branch->children()[1],type,fc[1],false);
else
timeLikeShower(children[1],type,fc[1],false);
}
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
break;
}
// H7 default
else if(_reconOpt==1) {
// shower the first particle
if(fc[0].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 1)
truncatedTimeLikeShower(children[0],branch,type,fc[0],false);
else
timeLikeShower(children[0],type,fc[0],false);
}
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 2)
truncatedTimeLikeShower(children[1],branch,type,fc[1],false);
else
timeLikeShower(children[1],type,fc[1],false);
}
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectTimeLikeBranching(particle,type,branch);
// must be at least hard emission
assert(fb.kinematics);
setupChildren = true;
continue;
}
else
break;
}
else if(_reconOpt>=2) {
// cut-off masses for the branching
const vector<Energy> & virtualMasses = fb.sudakov->virtualMasses(fb.ids);
// compute the masses of the children
Energy masses[3];
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics) {
const vector<Energy> & vm = fc[ix].sudakov->virtualMasses(fc[ix].ids);
Energy2 q2 =
fc[ix].kinematics->z()*(1.-fc[ix].kinematics->z())*sqr(fc[ix].kinematics->scale());
if(fc[ix].ids[0]->id()!=ParticleID::g) q2 += sqr(vm[0]);
masses[ix+1] = sqrt(q2);
}
else {
masses[ix+1] = virtualMasses[ix+1];
}
}
masses[0] = fb.ids[0]->id()!=ParticleID::g ? virtualMasses[0] : ZERO;
double z = fb.kinematics->z();
Energy2 pt2 = z*(1.-z)*(z*(1.-z)*sqr(fb.kinematics->scale()) + sqr(masses[0]))
- sqr(masses[1])*(1.-z) - sqr(masses[2])*z;
if(pt2>=ZERO) {
break;
}
// if only the hard emission have to accept it
else if ((fc[0].hard && !fc[1].kinematics) ||
(fc[1].hard && !fc[0].kinematics) ) {
break;
}
else {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].hard) continue;
if(fc[ix].kinematics && ! fc[ix].hard )
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
children[ix]->virtualMass(ZERO);
}
}
}
};
if(_reconOpt>=2) {
// shower the first particle
if(fc[0].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 1)
truncatedTimeLikeShower(children[0],branch,type,fc[0],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
if(children[0]->spinInfo()) children[0]->spinInfo()->develop();
// shower the second particle
if(fc[1].kinematics) {
// the parent has truncated emission and following line
if(!fb.hard && fb.iout == 2)
truncatedTimeLikeShower(children[1],branch,type,fc[1],false);
// hard emission and subsquent hard emissions
else if(fb.hard && !branch->children()[1]->children().empty() )
truncatedTimeLikeShower(children[1],branch->children()[1],type,fc[1],false);
else
timeLikeShower(children[1],type,fc[1],false);
}
if(children[1]->spinInfo()) children[1]->spinInfo()->develop();
// branching has happened
particle->showerKinematics()->updateParent(particle, children,fb.type);
}
if(first&&!children.empty())
particle->showerKinematics()->resetChildren(particle,children);
if(particle->spinInfo()) particle->spinInfo()->develop();
return true;
}
bool QTildeShowerHandler::truncatedSpaceLikeShower(tShowerParticlePtr particle, PPtr beam,
HardBranchingPtr branch,
ShowerInteraction type) {
tcPDFPtr pdf;
if(firstPDF().particle() == beamParticle())
pdf = firstPDF().pdf();
if(secondPDF().particle() == beamParticle())
pdf = secondPDF().pdf();
Energy freeze = 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] = bb.ids[0];
part[1] = bb.ids[2];
double zsplit = bb.kinematics->z();
// apply the vetos for the truncated shower
// if doesn't carry most of momentum
ShowerInteraction type2 = convertInteraction(bb.type);
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() );
// assign the splitting function and shower kinematics
particle->showerKinematics( kinematics );
if(kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(kinematics->pT());
// For the time being we are considering only 1->2 branching
// Now create the actual particles, make the otherChild a final state
// particle, while the newParent is not
ShowerParticlePtr newParent =
new_ptr( ShowerParticle( branch->branchingParticle()->dataPtr(), false ) );
ShowerParticlePtr otherChild =
new_ptr( ShowerParticle( timelike->branchingParticle()->dataPtr(),
true, true ) );
ShowerParticleVector theChildren;
theChildren.push_back( particle );
theChildren.push_back( otherChild );
particle->showerKinematics()->
updateParent( newParent, theChildren, branch->type());
// update the history if needed
currentTree()->updateInitialStateShowerProduct( progenitor(), newParent );
currentTree()->addInitialStateBranching( particle, newParent, otherChild );
// for the reconstruction of kinematics, parent/child
// relationships are according to the branching process:
// now continue the shower
bool emitted=false;
if(!hardOnly()) {
if( branch->parent() ) {
emitted = truncatedSpaceLikeShower( newParent, beam, branch->parent() , type);
}
else {
emitted = spaceLikeShower( newParent, beam , type);
}
}
if( !emitted ) {
if( intrinsicpT().find( progenitor() ) == intrinsicpT().end() ) {
kinematics->updateLast( newParent, ZERO, ZERO );
}
else {
pair<Energy,double> kt = intrinsicpT()[progenitor()];
kinematics->updateLast( newParent,
kt.first*cos( kt.second ),
kt.first*sin( kt.second ) );
}
}
particle->showerKinematics()->
updateChildren( newParent, theChildren,bb.type,false);
if(hardOnly()) return true;
// perform the shower of the final-state particle
if( timelike->children().empty() ) {
timeLikeShower( otherChild , type,Branching(),true);
}
else {
truncatedTimeLikeShower( otherChild, timelike , type,Branching(), true);
}
updateHistory(otherChild);
// return the emitted
return true;
}
// assign the splitting function and shower kinematics
particle->showerKinematics( bb.kinematics );
if(bb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(bb.kinematics->pT());
// For the time being we are considering only 1->2 branching
// Now create the actual particles, make the otherChild a final state
// particle, while the newParent is not
ShowerParticlePtr newParent = new_ptr( ShowerParticle( part[0], false ) );
ShowerParticlePtr otherChild = new_ptr( ShowerParticle( part[1], true, true ) );
ShowerParticleVector theChildren;
theChildren.push_back( particle );
theChildren.push_back( otherChild );
particle->showerKinematics()->
updateParent( newParent, theChildren, bb.type);
// update the history if needed
currentTree()->updateInitialStateShowerProduct( progenitor(), newParent );
currentTree()->addInitialStateBranching( particle, newParent, otherChild );
// for the reconstruction of kinematics, parent/child
// relationships are according to the branching process:
// now continue the shower
bool emitted = truncatedSpaceLikeShower( newParent, beam, branch,type);
// now reconstruct the momentum
if( !emitted ) {
if( intrinsicpT().find( progenitor() ) == intrinsicpT().end() ) {
bb.kinematics->updateLast( newParent, ZERO, ZERO );
}
else {
pair<Energy,double> kt = intrinsicpT()[ progenitor() ];
bb.kinematics->updateLast( newParent,
kt.first*cos( kt.second ),
kt.first*sin( kt.second ) );
}
}
particle->showerKinematics()->
updateChildren( newParent, theChildren, bb.type,false);
// perform the shower of the final-state particle
timeLikeShower( otherChild , type,Branching(),true);
updateHistory(otherChild);
// return the emitted
return true;
}
bool QTildeShowerHandler::
truncatedSpaceLikeDecayShower(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minmass, HardBranchingPtr branch,
ShowerInteraction type, Branching fb) {
// select a branching if we don't have one
if(!fb.kinematics)
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,branch);
// must be an emission, the forced one it not a truncated one
assert(fb.kinematics);
ShowerParticleVector children;
int ntry=0;
Branching fc[2];
bool setupChildren = true;
while (ntry<50) {
if(!fc[0].hard) fc[0] = Branching();
if(!fc[1].hard) fc[1] = Branching();
++ntry;
if(setupChildren) {
++_nFSR;
// Assign the shower kinematics to the emitting particle.
particle->showerKinematics(fb.kinematics);
if(fb.kinematics->pT()>progenitor()->highestpT())
progenitor()->highestpT(fb.kinematics->pT());
// create the ShowerParticle objects for the two children
children = createTimeLikeChildren(particle,fb.ids);
// updateChildren the children
particle->showerKinematics()->
updateChildren(particle, children, fb.type,_reconOpt>=3);
setupChildren = false;
}
// select branchings for children
if(!fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
// select branching for first particle
if(!fb.hard)
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,type,branch);
else if(fb.hard && ! branch->children()[0]->children().empty() )
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,type,
branch->children()[0]);
else
fc[0] = selectSpaceLikeDecayBranching(children[0],maxScales,minmass,type,
HardBranchingPtr());
}
else {
// select branching for first particle
if(fb.hard && !branch->children()[0]->children().empty() )
fc[0] = selectTimeLikeBranching(children[0],type,branch->children()[0]);
else
fc[0] = selectTimeLikeBranching(children[0],type,HardBranchingPtr());
}
}
// select branching for the second particle
if(!fc[1].kinematics) {
if(children[1]->id()==particle->id()) {
// select branching for first particle
if(!fb.hard)
fc[1] = selectSpaceLikeDecayBranching(children[1],maxScales,minmass,type,branch);
else if(fb.hard && ! branch->children()[1]->children().empty() )
fc[1] = selectSpaceLikeDecayBranching(children[1],maxScales,minmass,type,
branch->children()[1]);
else
fc[1] = selectSpaceLikeDecayBranching(children[1],maxScales,minmass,type,
HardBranchingPtr());
}
else {
if(fb.hard && !branch->children()[1]->children().empty() )
fc[1] = selectTimeLikeBranching(children[1],type,branch->children()[1]);
else
fc[1] = selectTimeLikeBranching(children[1],type,HardBranchingPtr());
}
}
// old default
if(_reconOpt==0 || (_reconOpt==1 && fb.hard) ) {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),children[0]);
currentTree()->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[0]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[0]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[0]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
}
// shower the second particle
if(fc[1].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[1]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[1]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[1]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[1],false);
// normal shower
else
timeLikeShower(children[0],type,fc[1],false);
}
}
updateHistory(children[1]);
// branching has happened
break;
}
// H7 default
else if(_reconOpt==1) {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),children[0]);
currentTree()->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[0]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[0]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[0]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
}
// shower the second particle
if(fc[1].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[1]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[1]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[1]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[1],false);
// normal shower
else
timeLikeShower(children[0],type,fc[1],false);
}
}
// clean up the vetoed emission
if(particle->virtualMass()==ZERO) {
particle->showerKinematics(ShoKinPtr());
for(unsigned int ix=0;ix<children.size();++ix)
particle->abandonChild(children[ix]);
children.clear();
particle->vetoEmission(fb.type,fb.kinematics->scale());
// generate the new emission
fb = selectSpaceLikeDecayBranching(particle,maxScales,minmass,type,branch);
// must be at least hard emission
assert(fb.kinematics);
setupChildren = true;
continue;
}
else {
updateHistory(children[1]);
break;
}
}
else if(_reconOpt>=2) {
// cut-off masses for the branching
const vector<Energy> & virtualMasses = fb.sudakov->virtualMasses(fb.ids);
// compute the masses of the children
Energy masses[3];
// space-like children
masses[1] = children[0]->virtualMass();
// time-like child
if(fc[1].kinematics) {
const vector<Energy> & vm = fc[1].sudakov->virtualMasses(fc[1].ids);
Energy2 q2 =
fc[1].kinematics->z()*(1.-fc[1].kinematics->z())*sqr(fc[1].kinematics->scale());
if(fc[1].ids[0]->id()!=ParticleID::g) q2 += sqr(vm[0]);
masses[2] = sqrt(q2);
}
else {
masses[2] = virtualMasses[2];
}
masses[0]=particle->virtualMass();
double z = fb.kinematics->z();
Energy2 pt2 = (1.-z)*(z*sqr(masses[0])-sqr(masses[1])-z/(1.-z)*sqr(masses[2]));
if(pt2>=ZERO) {
break;
}
else {
// reset the scales for the children
for(unsigned int ix=0;ix<2;++ix) {
if(fc[ix].kinematics)
children[ix]->vetoEmission(fc[ix].type,fc[ix].kinematics->scale());
else {
if(ix==0)
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,Constants::MaxEnergy);
else
children[ix]->vetoEmission(ShowerPartnerType::QCDColourLine,ZERO);
}
}
children[0]->virtualMass(_progenitor->progenitor()->mass());
children[1]->virtualMass(ZERO);
}
}
};
if(_reconOpt>=2) {
// update the history if needed
currentTree()->updateInitialStateShowerProduct(progenitor(),children[0]);
currentTree()->addInitialStateBranching(particle,children[0],children[1]);
// shower the first particle
if(fc[0].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[0]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[0]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[0]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[0],false);
// normal shower
else
timeLikeShower(children[0],type,fc[0],false);
}
}
// shower the second particle
if(fc[1].kinematics) {
if(children[0]->id()==particle->id()) {
if(!fb.hard)
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch,type,fc[1]);
else if(fb.hard && ! branch->children()[0]->children().empty() )
truncatedSpaceLikeDecayShower( children[0],maxScales,minmass,
branch->children()[0],type,fc[1]);
else
spaceLikeDecayShower( children[0],maxScales,minmass,type,fc[1]);
}
else {
if(fb.hard && !branch->children()[0]->children().empty() )
truncatedTimeLikeShower(children[0],branch->children()[0],type,fc[1],false);
// normal shower
else
timeLikeShower(children[0],type,fc[1],false);
}
}
updateHistory(children[1]);
}
return true;
}
void QTildeShowerHandler::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;
vector<long> 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.particles;
if(ids[0]->id()==br[0]&&ids[1]->id()==br[1]&&ids[2]->id()==br[2]) {
sudakov=cjt->second.sudakov;
break;
}
}
if(!sudakov) throw Exception() << "Can't find Sudakov for the hard emission in "
<< "QTildeShowerHandler::connectTrees() for ISR"
<< Exception::runerror;
(**cit).parent()->sudakov(sudakov);
}
// Sudakovs for FSR
else if(!(**cit).children().empty()) {
++_nfs;
vector<long> 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.particles;
if(ids[0]->id()==br[0]&&ids[1]->id()==br[1]&&ids[2]->id()==br[2]) {
sudakov=cjt->second.sudakov;
break;
}
}
if(!sudakov) {
throw Exception() << "Can't find Sudakov for the hard emission in "
<< "QTildeShowerHandler::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,interaction_,true);
hardTree->partnersSet(true);
// inverse reconstruction
if(hard) {
showerModel()->kinematicsReconstructor()->
deconstructHardJets(hardTree,interaction_);
}
else
showerModel()->kinematicsReconstructor()->
deconstructDecayJets(hardTree,interaction_);
// now reset the momenta of the showering particles
vector<ShowerProgenitorPtr> particlesToShower=showerTree->extractProgenitors();
// 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 QTildeShowerHandler::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 QTildeShowerHandler::doShowering(bool hard,XCPtr xcomb) {
// zero number of emissions
_nis = _nfs = 0;
// if MC@NLO H event and limited emissions
// indicate both final and initial state emission
if ( currentTree()->isMCatNLOHEvent() && _limitEmissions != 0 ) {
_nis = _nfs = 1;
}
// extract particles to shower
vector<ShowerProgenitorPtr> particlesToShower(setupShower(hard));
// check if we should shower
bool colCharge = false;
for(unsigned int ix=0;ix<particlesToShower.size();++ix) {
if(particlesToShower[ix]->progenitor()->dataPtr()->coloured() ||
particlesToShower[ix]->progenitor()->dataPtr()->charged()) {
colCharge = true;
break;
}
}
if(!colCharge) {
_currenttree->hasShowered(true);
return;
}
// setup the maximum scales for the shower
if (restrictPhasespace()) 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() << "QTildeShowerHandler.cc: Mass of decaying particle is "
<< "below constituent masses of decay products."
<< Exception::eventerror;
}
}
// setup for reweighted
bool reWeighting = _reWeight && hard && ShowerHandler::currentHandler()->firstInteraction();
double eventWeight=0.;
unsigned int nTryReWeight(0);
// 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,interaction_,true);
_nis = _nfs = 0;
// if MC@NLO H event and limited emissions
// indicate both final and initial state emission
if ( currentTree()->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(!doFSR()) continue;
// perform shower
progenitor()->hasEmitted(startTimeLikeShower(interaction_));
}
// initial-state radiation
else {
if(!doISR()) continue;
// hard process
if(hard) {
// get the PDF
setBeamParticle(_progenitor->beam());
if(!beamParticle()) {
throw Exception() << "Incorrect type of beam particle in "
<< "QTildeShowerHandler::doShowering(). "
<< "This should not happen for conventional choices but may happen if you have used a"
<< " non-default choice and have not changed the create ParticleData line in the input files"
<< " for this particle to create BeamParticleData."
<< Exception::runerror;
}
// 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,
interaction_));
}
// 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,
interaction_));
}
}
}
// do the kinematic reconstruction, checking if it worked
reconstructed = hard ?
showerModel()->kinematicsReconstructor()->
reconstructHardJets (currentTree(),intrinsicpT(),interaction_,
switchRecon && ntry>maximumTries()/2) :
showerModel()->kinematicsReconstructor()->
reconstructDecayJets(currentTree(),interaction_);
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 QTildeShowerHandler::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);
hardTree(HardTreePtr());
}
void QTildeShowerHandler:: convertHardTree(bool hard,ShowerInteraction type) {
map<ColinePtr,ColinePtr> cmap;
// incoming particles
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::const_iterator
cit=currentTree()->incomingLines().begin();cit!=currentTree()->incomingLines().end();++cit) {
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
mit = hardTree()->particles().find(cit->first->progenitor());
// put the colour lines in the map
ShowerParticlePtr oldParticle = cit->first->progenitor();
ShowerParticlePtr newParticle = mit->second->branchingParticle();
ColinePtr cLine = oldParticle-> colourLine();
ColinePtr aLine = oldParticle->antiColourLine();
if(newParticle->colourLine() &&
cmap.find(newParticle-> colourLine())==cmap.end())
cmap[newParticle-> colourLine()] = cLine;
if(newParticle->antiColourLine() &&
cmap.find(newParticle->antiColourLine())==cmap.end())
cmap[newParticle->antiColourLine()] = aLine;
// check whether or not particle emits
bool emission = mit->second->parent();
if(emission) {
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
}
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
}
newParticle = mit->second->parent()->branchingParticle();
}
// get the new colour lines
ColinePtr newCLine,newALine;
// sort out colour lines
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newCLine = cmap[ctemp];
}
else {
newCLine = new_ptr(ColourLine());
cmap[ctemp] = newCLine;
}
}
// and anticolour lines
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newALine = cmap[ctemp];
}
else {
newALine = new_ptr(ColourLine());
cmap[ctemp] = newALine;
}
}
// remove colour lines from old particle
if(aLine) {
aLine->removeAntiColoured(cit->first->copy());
aLine->removeAntiColoured(cit->first->progenitor());
}
if(cLine) {
cLine->removeColoured(cit->first->copy());
cLine->removeColoured(cit->first->progenitor());
}
// add particle to colour lines
if(newCLine) newCLine->addColoured (newParticle);
if(newALine) newALine->addAntiColoured(newParticle);
// insert new particles
cit->first->copy(newParticle);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*newParticle,1,false)));
cit->first->progenitor(sp);
currentTree()->incomingLines()[cit->first]=sp;
cit->first->perturbative(!emission);
// and the emitted particle if needed
if(emission) {
ShowerParticlePtr newOut = mit->second->parent()->children()[1]->branchingParticle();
if(newOut->colourLine()) {
ColinePtr ctemp = newOut-> colourLine();
ctemp->removeColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addColoured (newOut);
}
if(newOut->antiColourLine()) {
ColinePtr ctemp = newOut->antiColourLine();
ctemp->removeAntiColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addAntiColoured(newOut);
}
ShowerParticlePtr sout=new_ptr(ShowerParticle(*newOut,1,true));
ShowerProgenitorPtr out=new_ptr(ShowerProgenitor(cit->first->original(),newOut,sout));
out->perturbative(false);
currentTree()->outgoingLines().insert(make_pair(out,sout));
}
if(hard) {
// sort out the value of x
if(mit->second->beam()->momentum().z()>ZERO) {
sp->x(newParticle->momentum(). plus()/mit->second->beam()->momentum(). plus());
}
else {
sp->x(newParticle->momentum().minus()/mit->second->beam()->momentum().minus());
}
}
}
// outgoing particles
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
cit=currentTree()->outgoingLines().begin();cit!=currentTree()->outgoingLines().end();++cit) {
map<tShowerTreePtr,pair<tShowerProgenitorPtr,
tShowerParticlePtr> >::const_iterator tit;
for(tit = currentTree()->treelinks().begin();
tit != currentTree()->treelinks().end();++tit) {
if(tit->second.first && tit->second.second==cit->first->progenitor())
break;
}
map<ShowerParticlePtr,tHardBranchingPtr>::const_iterator
mit = hardTree()->particles().find(cit->first->progenitor());
if(mit==hardTree()->particles().end()) continue;
// put the colour lines in the map
ShowerParticlePtr oldParticle = cit->first->progenitor();
ShowerParticlePtr newParticle = mit->second->branchingParticle();
ShowerParticlePtr newOut;
ColinePtr cLine = oldParticle-> colourLine();
ColinePtr aLine = oldParticle->antiColourLine();
if(newParticle->colourLine() &&
cmap.find(newParticle-> colourLine())==cmap.end())
cmap[newParticle-> colourLine()] = cLine;
if(newParticle->antiColourLine() &&
cmap.find(newParticle->antiColourLine())==cmap.end())
cmap[newParticle->antiColourLine()] = aLine;
// check whether or not particle emits
bool emission = !mit->second->children().empty();
if(emission) {
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
}
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
}
newParticle = mit->second->children()[0]->branchingParticle();
newOut = mit->second->children()[1]->branchingParticle();
if(newParticle->id()!=oldParticle->id()&&newParticle->id()==newOut->id())
swap(newParticle,newOut);
}
// get the new colour lines
ColinePtr newCLine,newALine;
// sort out colour lines
if(newParticle->colourLine()) {
ColinePtr ctemp = newParticle-> colourLine();
ctemp->removeColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newCLine = cmap[ctemp];
}
else {
newCLine = new_ptr(ColourLine());
cmap[ctemp] = newCLine;
}
}
// and anticolour lines
if(newParticle->antiColourLine()) {
ColinePtr ctemp = newParticle->antiColourLine();
ctemp->removeAntiColoured(newParticle);
if(cmap.find(ctemp)!=cmap.end()) {
newALine = cmap[ctemp];
}
else {
newALine = new_ptr(ColourLine());
cmap[ctemp] = newALine;
}
}
// remove colour lines from old particle
if(aLine) {
aLine->removeAntiColoured(cit->first->copy());
aLine->removeAntiColoured(cit->first->progenitor());
}
if(cLine) {
cLine->removeColoured(cit->first->copy());
cLine->removeColoured(cit->first->progenitor());
}
// special for unstable particles
if(newParticle->id()==oldParticle->id() &&
(tit!=currentTree()->treelinks().end()||!oldParticle->dataPtr()->stable())) {
Lorentz5Momentum oldMomentum = oldParticle->momentum();
Lorentz5Momentum newMomentum = newParticle->momentum();
LorentzRotation boost( oldMomentum.findBoostToCM(),oldMomentum.e()/oldMomentum.mass());
if(tit!=currentTree()->treelinks().end()) tit->first->transform(boost,false);
oldParticle->transform(boost);
boost = LorentzRotation(-newMomentum.findBoostToCM(),newMomentum.e()/newMomentum.mass());
oldParticle->transform(boost);
if(tit!=currentTree()->treelinks().end()) tit->first->transform(boost,false);
newParticle=oldParticle;
}
// add particle to colour lines
if(newCLine) newCLine->addColoured (newParticle);
if(newALine) newALine->addAntiColoured(newParticle);
// insert new particles
cit->first->copy(newParticle);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*newParticle,1,true)));
cit->first->progenitor(sp);
currentTree()->outgoingLines()[cit->first]=sp;
cit->first->perturbative(!emission);
// and the emitted particle if needed
if(emission) {
if(newOut->colourLine()) {
ColinePtr ctemp = newOut-> colourLine();
ctemp->removeColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addColoured (newOut);
}
if(newOut->antiColourLine()) {
ColinePtr ctemp = newOut->antiColourLine();
ctemp->removeAntiColoured(newOut);
assert(cmap.find(ctemp)!=cmap.end());
cmap[ctemp]->addAntiColoured(newOut);
}
ShowerParticlePtr sout=new_ptr(ShowerParticle(*newOut,1,true));
ShowerProgenitorPtr out=new_ptr(ShowerProgenitor(cit->first->original(),newOut,sout));
out->perturbative(false);
currentTree()->outgoingLines().insert(make_pair(out,sout));
}
// update any decay products
if(tit!=currentTree()->treelinks().end())
currentTree()->updateLink(tit->first,make_pair(cit->first,sp));
}
// reset the tree
currentTree()->resetShowerProducts();
// reextract the particles and set the colour partners
vector<ShowerParticlePtr> particles =
currentTree()->extractProgenitorParticles();
// clear the partners
for(unsigned int ix=0;ix<particles.size();++ix) {
particles[ix]->partner(ShowerParticlePtr());
particles[ix]->clearPartners();
}
// clear the tree
hardTree(HardTreePtr());
// Set the initial evolution scales
showerModel()->partnerFinder()->
setInitialEvolutionScales(particles,!hard,type,!_hardtree);
}
Branching QTildeShowerHandler::selectTimeLikeBranching(tShowerParticlePtr particle,
ShowerInteraction type,
HardBranchingPtr branch) {
Branching fb;
unsigned int iout=0;
while (true) {
// break if doing truncated shower and no truncated shower needed
if(branch && (!isTruncatedShowerON()||hardOnly())) break;
fb=_splittingGenerator->chooseForwardBranching(*particle,_finalenhance,type);
// no emission break
if(!fb.kinematics) break;
// special for truncated shower
if(branch) {
// check haven't evolved too far
if(fb.kinematics->scale() < branch->scale()) {
fb=Branching();
break;
}
// find the truncated line
iout=0;
if(fb.ids[1]->id()!=fb.ids[2]->id()) {
if(fb.ids[1]->id()==particle->id()) iout=1;
else if (fb.ids[2]->id()==particle->id()) iout=2;
}
else if(fb.ids[1]->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 type2 = convertInteraction(fb.type);
// and evolution
if(type2==branch->sudakov()->interactionType()) {
if(zsplit < 0.5 || // hardest line veto
fb.kinematics->scale()*zsplit < branch->scale() ) { // angular ordering veto
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// pt veto
if(fb.kinematics->pT() > progenitor()->maximumpT(type2)) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// standard vetos for all emissions
if(timeLikeVetoed(fb,particle)) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
continue;
}
// special for already decayed particles
// don't allow flavour changing branchings
bool vetoDecay = false;
for(map<tShowerTreePtr,pair<tShowerProgenitorPtr,
tShowerParticlePtr> >::const_iterator tit = currentTree()->treelinks().begin();
tit != currentTree()->treelinks().end();++tit) {
if(tit->second.first == progenitor()) {
map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
it = currentTree()->outgoingLines().find(progenitor());
if(it!=currentTree()->outgoingLines().end() && particle == it->second &&
fb.ids[0]!=fb.ids[1] && fb.ids[1]!=fb.ids[2]) {
vetoDecay = true;
break;
}
}
}
if(vetoDecay) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
if(particle->spinInfo()) particle->spinInfo()->decayVertex(VertexPtr());
continue;
}
break;
}
// normal case
if(!branch) {
if(fb.kinematics) fb.hard = false;
return fb;
}
// truncated emission
if(fb.kinematics) {
fb.hard = false;
fb.iout = iout;
return fb;
}
// otherwise need to return the hard emission
// construct the kinematics for the hard emission
ShoKinPtr showerKin=
branch->sudakov()->createFinalStateBranching(branch->scale(),
branch->children()[0]->z(),
branch->phi(),
branch->children()[0]->pT());
IdList idlist(3);
idlist[0] = particle->dataPtr();
idlist[1] = branch->children()[0]->branchingParticle()->dataPtr();
idlist[2] = branch->children()[1]->branchingParticle()->dataPtr();
fb = Branching( showerKin, idlist, branch->sudakov(),branch->type() );
fb.hard = true;
fb.iout=0;
// return it
return fb;
}
Branching QTildeShowerHandler::selectSpaceLikeDecayBranching(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minmass,ShowerInteraction type,
HardBranchingPtr branch) {
Branching fb;
unsigned int iout=0;
while (true) {
// break if doing truncated shower and no truncated shower needed
if(branch && (!isTruncatedShowerON()||hardOnly())) break;
// select branching
fb=_splittingGenerator->chooseDecayBranching(*particle,maxScales,minmass,
_initialenhance,type);
// return if no radiation
if(!fb.kinematics) break;
// special for truncated shower
if(branch) {
// check haven't evolved too far
if(fb.kinematics->scale() < branch->scale()) {
fb=Branching();
break;
}
// find the truncated line
iout=0;
if(fb.ids[1]->id()!=fb.ids[2]->id()) {
if(fb.ids[1]->id()==particle->id()) iout=1;
else if (fb.ids[2]->id()==particle->id()) iout=2;
}
else if(fb.ids[1]->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 type2 = convertInteraction(fb.type);
double zsplit = iout==1 ? fb.kinematics->z() : 1-fb.kinematics->z();
if(type2==branch->sudakov()->interactionType()) {
if(zsplit < 0.5 || // hardest line veto
fb.kinematics->scale()*zsplit < branch->scale() ) { // angular ordering veto
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// pt veto
if(fb.kinematics->pT() > progenitor()->maximumpT(type2)) {
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
}
// if not vetoed break
if(spaceLikeDecayVetoed(fb,particle)) {
// otherwise reset scale and continue
particle->vetoEmission(fb.type,fb.kinematics->scale());
continue;
}
break;
}
// normal case
if(!branch) {
if(fb.kinematics) fb.hard = false;
return fb;
}
// truncated emission
if(fb.kinematics) {
fb.hard = false;
fb.iout = iout;
return fb;
}
// otherwise need to return the hard emission
// construct the kinematics for the hard emission
ShoKinPtr showerKin=
branch->sudakov()->createDecayBranching(branch->scale(),
branch->children()[0]->z(),
branch->phi(),
branch->children()[0]->pT());
IdList idlist(3);
idlist[0] = particle->dataPtr();
idlist[1] = branch->children()[0]->branchingParticle()->dataPtr();
idlist[2] = branch->children()[1]->branchingParticle()->dataPtr();
// create the branching
fb = Branching( showerKin, idlist, branch->sudakov(),ShowerPartnerType::QCDColourLine );
fb.hard=true;
fb.iout=0;
// return it
return fb;
}
void QTildeShowerHandler::checkFlags() {
string error = "Inconsistent hard emission set-up in QTildeShowerHandler::showerHardProcess(). ";
if ( ( currentTree()->isMCatNLOSEvent() || currentTree()->isMCatNLOHEvent() ) ) {
if (_hardEmission ==2 )
throw Exception() << error
<< "Cannot generate POWHEG matching with MC@NLO shower "
<< "approximation. Add 'set QTildeShowerHandler:HardEmission 0' to input file."
<< Exception::runerror;
if ( canHandleMatchboxTrunc() )
throw Exception() << error
<< "Cannot use truncated qtilde shower with MC@NLO shower "
<< "approximation. Set LHCGenerator:EventHandler"
<< ":CascadeHandler to '/Herwig/Shower/ShowerHandler' or "
<< "'/Herwig/Shower/Dipole/DipoleShowerHandler'."
<< Exception::runerror;
}
else if ( ((currentTree()->isPowhegSEvent() || currentTree()->isPowhegHEvent()) ) &&
_hardEmission != 2){
if ( canHandleMatchboxTrunc())
throw Exception() << error
<< "Unmatched events requested for POWHEG shower "
<< "approximation. Set QTildeShowerHandler:HardEmission to "
<< "'POWHEG'."
<< Exception::runerror;
else if (_hardEmissionWarn) {
_hardEmissionWarn = false;
_hardEmission=2;
throw Exception() << error
<< "Unmatched events requested for POWHEG shower "
<< "approximation. Changing QTildeShowerHandler:HardEmission from "
<< _hardEmission << " to 2"
<< Exception::warning;
}
}
if ( currentTree()->isPowhegSEvent() || currentTree()->isPowhegHEvent()) {
if (currentTree()->showerApproximation()->needsTruncatedShower() &&
!canHandleMatchboxTrunc() )
throw Exception() << error
<< "Current shower handler cannot generate truncated shower. "
<< "Set Generator:EventHandler:CascadeHandler to "
<< "'/Herwig/Shower/PowhegShowerHandler'."
<< Exception::runerror;
}
else if ( currentTree()->truncatedShower() && _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 &&
// firstInteraction())
// throw Exception() << error
// << "POWHEG matching requested for LO events. Include "
// << "'set Factory:ShowerApproximation MEMatching' in input file."
// << Exception::runerror;
}
tPPair QTildeShowerHandler::remakeRemnant(tPPair oldp){
// get the parton extractor
PartonExtractor & pex = *lastExtractor();
// get the new partons
tPPair newp = make_pair(findFirstParton(oldp.first ),
findFirstParton(oldp.second));
// if the same do nothing
if(newp == oldp) return oldp;
// Creates the new remnants and returns the new PartonBinInstances
// ATTENTION Broken here for very strange configuration
PBIPair newbins = pex.newRemnants(oldp, newp, newStep());
newStep()->addIntermediate(newp.first);
newStep()->addIntermediate(newp.second);
// return the new partons
return newp;
}
PPtr QTildeShowerHandler::findFirstParton(tPPtr seed) const{
if(seed->parents().empty()) return seed;
tPPtr parent = seed->parents()[0];
//if no parent there this is a loose end which will
//be connected to the remnant soon.
if(!parent || parent == incomingBeams().first ||
parent == incomingBeams().second ) return seed;
else return findFirstParton(parent);
}
void QTildeShowerHandler::decay(ShowerTreePtr tree, ShowerDecayMap & decay) {
// must be one incoming particle
assert(tree->incomingLines().size()==1);
// apply any transforms
tree->applyTransforms();
// if already decayed return
if(!tree->outgoingLines().empty()) return;
// now we need to replace the particle with a new copy after the shower
// find particle after the shower
map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator
tit = tree->parent()->treelinks().find(tree);
assert(tit!=tree->parent()->treelinks().end());
ShowerParticlePtr newparent=tit->second.second;
PerturbativeProcessPtr newProcess = new_ptr(PerturbativeProcess());
newProcess->incoming().push_back(make_pair(newparent,PerturbativeProcessPtr()));
DecayProcessMap decayMap;
ShowerHandler::decay(newProcess,decayMap);
ShowerTree::constructTrees(tree,decay,newProcess,decayMap);
}
namespace {
ShowerProgenitorPtr
findFinalStateLine(ShowerTreePtr tree, long id, Lorentz5Momentum momentum) {
map<ShowerProgenitorPtr,tShowerParticlePtr>::iterator partner;
Energy2 dmin(1e30*GeV2);
for(map<ShowerProgenitorPtr,tShowerParticlePtr>::iterator
cit =tree->outgoingLines().begin(); cit!=tree->outgoingLines().end(); ++cit) {
if(cit->second->id()!=id) continue;
Energy2 test =
sqr(cit->second->momentum().x()-momentum.x())+
sqr(cit->second->momentum().y()-momentum.y())+
sqr(cit->second->momentum().z()-momentum.z())+
sqr(cit->second->momentum().t()-momentum.t());
if(test<dmin) {
dmin = test;
partner = cit;
}
}
return partner->first;
}
ShowerProgenitorPtr
findInitialStateLine(ShowerTreePtr tree, long id, Lorentz5Momentum momentum) {
map<ShowerProgenitorPtr,ShowerParticlePtr>::iterator partner;
Energy2 dmin(1e30*GeV2);
for(map<ShowerProgenitorPtr,ShowerParticlePtr>::iterator
cit =tree->incomingLines().begin(); cit!=tree->incomingLines().end(); ++cit) {
if(cit->second->id()!=id) continue;
Energy2 test =
sqr(cit->second->momentum().x()-momentum.x())+
sqr(cit->second->momentum().y()-momentum.y())+
sqr(cit->second->momentum().z()-momentum.z())+
sqr(cit->second->momentum().t()-momentum.t());
if(test<dmin) {
dmin = test;
partner = cit;
}
}
return partner->first;
}
void fixSpectatorColours(PPtr newSpect,ShowerProgenitorPtr oldSpect,
ColinePair & cline,ColinePair & aline, bool reconnect) {
cline.first = oldSpect->progenitor()->colourLine();
cline.second = newSpect->colourLine();
aline.first = oldSpect->progenitor()->antiColourLine();
aline.second = newSpect->antiColourLine();
if(!reconnect) return;
if(cline.first) {
cline.first ->removeColoured(oldSpect->copy());
cline.first ->removeColoured(oldSpect->progenitor());
cline.second->removeColoured(newSpect);
cline.first ->addColoured(newSpect);
}
if(aline.first) {
aline.first ->removeAntiColoured(oldSpect->copy());
aline.first ->removeAntiColoured(oldSpect->progenitor());
aline.second->removeAntiColoured(newSpect);
aline.first ->addAntiColoured(newSpect);
}
}
void fixInitialStateEmitter(ShowerTreePtr tree, PPtr newEmit,PPtr emitted, ShowerProgenitorPtr emitter,
ColinePair cline,ColinePair aline,double x) {
// sort out the colours
if(emitted->dataPtr()->iColour()==PDT::Colour8) {
// emitter
if(cline.first && cline.first == emitter->progenitor()->antiColourLine() &&
cline.second !=newEmit->antiColourLine()) {
// sort out not radiating line
ColinePtr col = emitter->progenitor()->colourLine();
if(col) {
col->removeColoured(emitter->copy());
col->removeColoured(emitter->progenitor());
newEmit->colourLine()->removeColoured(newEmit);
col->addColoured(newEmit);
}
}
else if(aline.first && aline.first == emitter->progenitor()->colourLine() &&
aline.second !=newEmit->colourLine()) {
// sort out not radiating line
ColinePtr anti = emitter->progenitor()->antiColourLine();
if(anti) {
anti->removeAntiColoured(emitter->copy());
anti->removeAntiColoured(emitter->progenitor());
newEmit->colourLine()->removeAntiColoured(newEmit);
anti->addAntiColoured(newEmit);
}
}
else
assert(false);
// emitted
if(cline.first && cline.second==emitted->colourLine()) {
cline.second->removeColoured(emitted);
cline.first->addColoured(emitted);
}
else if(aline.first && aline.second==emitted->antiColourLine()) {
aline.second->removeAntiColoured(emitted);
aline.first->addAntiColoured(emitted);
}
else
assert(false);
}
else {
if(emitter->progenitor()->antiColourLine() ) {
ColinePtr col = emitter->progenitor()->antiColourLine();
col->removeAntiColoured(emitter->copy());
col->removeAntiColoured(emitter->progenitor());
if(newEmit->antiColourLine()) {
newEmit->antiColourLine()->removeAntiColoured(newEmit);
col->addAntiColoured(newEmit);
}
else if (emitted->colourLine()) {
emitted->colourLine()->removeColoured(emitted);
col->addColoured(emitted);
}
else
assert(false);
}
if(emitter->progenitor()->colourLine() ) {
ColinePtr col = emitter->progenitor()->colourLine();
col->removeColoured(emitter->copy());
col->removeColoured(emitter->progenitor());
if(newEmit->colourLine()) {
newEmit->colourLine()->removeColoured(newEmit);
col->addColoured(newEmit);
}
else if (emitted->antiColourLine()) {
emitted->antiColourLine()->removeAntiColoured(emitted);
col->addAntiColoured(emitted);
}
else
assert(false);
}
}
// update the emitter
emitter->copy(newEmit);
ShowerParticlePtr sp = new_ptr(ShowerParticle(*newEmit,1,false));
sp->x(x);
emitter->progenitor(sp);
tree->incomingLines()[emitter]=sp;
emitter->perturbative(false);
// add emitted
sp=new_ptr(ShowerParticle(*emitted,1,true));
ShowerProgenitorPtr gluon=new_ptr(ShowerProgenitor(emitter->original(),emitted,sp));
gluon->perturbative(false);
tree->outgoingLines().insert(make_pair(gluon,sp));
}
void fixFinalStateEmitter(ShowerTreePtr tree, PPtr newEmit,PPtr emitted, ShowerProgenitorPtr emitter,
ColinePair cline,ColinePair aline) {
map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator tit;
// special case if decayed
for(tit = tree->treelinks().begin(); tit != tree->treelinks().end();++tit) {
if(tit->second.first && tit->second.second==emitter->progenitor())
break;
}
// sort out the colour lines
if(cline.first && cline.first == emitter->progenitor()->antiColourLine() &&
cline.second !=newEmit->antiColourLine()) {
// sort out not radiating line
ColinePtr col = emitter->progenitor()->colourLine();
if(col) {
col->removeColoured(emitter->copy());
col->removeColoured(emitter->progenitor());
newEmit->colourLine()->removeColoured(newEmit);
col->addColoured(newEmit);
}
}
else if(aline.first && aline.first == emitter->progenitor()->colourLine() &&
aline.second !=newEmit->colourLine()) {
// sort out not radiating line
ColinePtr anti = emitter->progenitor()->antiColourLine();
if(anti) {
anti->removeAntiColoured(emitter->copy());
anti->removeAntiColoured(emitter->progenitor());
newEmit->colourLine()->removeAntiColoured(newEmit);
anti->addAntiColoured(newEmit);
}
}
else
assert(false);
// update the emitter
emitter->copy(newEmit);
ShowerParticlePtr sp = new_ptr(ShowerParticle(*newEmit,1,true));
emitter->progenitor(sp);
tree->outgoingLines()[emitter]=sp;
emitter->perturbative(false);
// update for decaying particles
if(tit!=tree->treelinks().end())
tree->updateLink(tit->first,make_pair(emitter,sp));
// add the emitted particle
// sort out the colour
if(cline.first && cline.second==emitted->antiColourLine()) {
cline.second->removeAntiColoured(emitted);
cline.first->addAntiColoured(emitted);
}
else if(aline.first && aline.second==emitted->colourLine()) {
aline.second->removeColoured(emitted);
aline.first->addColoured(emitted);
}
else
assert(false);
sp=new_ptr(ShowerParticle(*emitted,1,true));
ShowerProgenitorPtr gluon=new_ptr(ShowerProgenitor(emitter->original(),
emitted,sp));
gluon->perturbative(false);
tree->outgoingLines().insert(make_pair(gluon,sp));
}
}
void QTildeShowerHandler::setupMECorrection(RealEmissionProcessPtr real) {
assert(real);
currentTree()->hardMatrixElementCorrection(true);
// II emission
if(real->emitter() < real->incoming().size() &&
real->spectator() < real->incoming().size()) {
// recoiling system
for( map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
cjt= currentTree()->outgoingLines().begin();
cjt != currentTree()->outgoingLines().end();++cjt ) {
cjt->first->progenitor()->transform(real->transformation());
cjt->first->copy()->transform(real->transformation());
}
// the the radiating system
ShowerProgenitorPtr emitter,spectator;
unsigned int iemit = real->emitter();
unsigned int ispect = real->spectator();
int ig = int(real->emitted())-int(real->incoming().size());
emitter = findInitialStateLine(currentTree(),
real->bornIncoming()[iemit]->id(),
real->bornIncoming()[iemit]->momentum());
spectator = findInitialStateLine(currentTree(),
real->bornIncoming()[ispect]->id(),
real->bornIncoming()[ispect]->momentum());
// sort out the colours
ColinePair cline,aline;
fixSpectatorColours(real->incoming()[ispect],spectator,cline,aline,true);
// update the spectator
spectator->copy(real->incoming()[ispect]);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*real->incoming()[ispect],1,false)));
sp->x(ispect ==0 ? real->x().first :real->x().second);
spectator->progenitor(sp);
currentTree()->incomingLines()[spectator]=sp;
spectator->perturbative(true);
// now for the emitter
fixInitialStateEmitter(currentTree(),real->incoming()[iemit],real->outgoing()[ig],
emitter,cline,aline,iemit ==0 ? real->x().first :real->x().second);
}
// FF emission
else if(real->emitter() >= real->incoming().size() &&
real->spectator() >= real->incoming().size()) {
assert(real->outgoing()[real->emitted()-real->incoming().size()]->id()==ParticleID::g);
// find the emitter and spectator in the shower tree
ShowerProgenitorPtr emitter,spectator;
int iemit = int(real->emitter())-int(real->incoming().size());
emitter = findFinalStateLine(currentTree(),
real->bornOutgoing()[iemit]->id(),
real->bornOutgoing()[iemit]->momentum());
int ispect = int(real->spectator())-int(real->incoming().size());
spectator = findFinalStateLine(currentTree(),
real->bornOutgoing()[ispect]->id(),
real->bornOutgoing()[ispect]->momentum());
map<tShowerTreePtr,pair<tShowerProgenitorPtr,tShowerParticlePtr> >::const_iterator tit;
// first the spectator
// special case if decayed
for(tit = currentTree()->treelinks().begin(); tit != currentTree()->treelinks().end();++tit) {
if(tit->second.first && tit->second.second==spectator->progenitor())
break;
}
// sort out the colours
ColinePair cline,aline;
fixSpectatorColours(real->outgoing()[ispect],spectator,cline,aline,true);
// update the spectator
spectator->copy(real->outgoing()[ispect]);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*real->outgoing()[ispect],1,true)));
spectator->progenitor(sp);
currentTree()->outgoingLines()[spectator]=sp;
spectator->perturbative(true);
// update for decaying particles
if(tit!=currentTree()->treelinks().end())
currentTree()->updateLink(tit->first,make_pair(spectator,sp));
// now the emitting particle
int ig = int(real->emitted())-int(real->incoming().size());
fixFinalStateEmitter(currentTree(),real->outgoing()[iemit],
real->outgoing()[ig],
emitter,cline,aline);
}
// IF emission
else {
// scattering process
if(real->incoming().size()==2) {
ShowerProgenitorPtr emitter,spectator;
unsigned int iemit = real->emitter();
unsigned int ispect = real->spectator();
int ig = int(real->emitted())-int(real->incoming().size());
ColinePair cline,aline;
// incoming spectator
if(ispect<2) {
spectator = findInitialStateLine(currentTree(),
real->bornIncoming()[ispect]->id(),
real->bornIncoming()[ispect]->momentum());
fixSpectatorColours(real->incoming()[ispect],spectator,cline,aline,true);
// update the spectator
spectator->copy(real->incoming()[ispect]);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*real->incoming()[ispect],1,false)));
sp->x(ispect ==0 ? real->x().first :real->x().second);
spectator->progenitor(sp);
currentTree()->incomingLines()[spectator]=sp;
spectator->perturbative(true);
}
// outgoing spectator
else {
spectator = findFinalStateLine(currentTree(),
real->bornOutgoing()[ispect-real->incoming().size()]->id(),
real->bornOutgoing()[ispect-real->incoming().size()]->momentum());
// special case if decayed
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==spectator->progenitor())
break;
}
fixSpectatorColours(real->outgoing()[ispect-real->incoming().size()],spectator,cline,aline,true);
// update the spectator
spectator->copy(real->outgoing()[ispect-real->incoming().size()]);
ShowerParticlePtr sp(new_ptr(ShowerParticle(*real->outgoing()[ispect-real->incoming().size()],1,true)));
spectator->progenitor(sp);
currentTree()->outgoingLines()[spectator]=sp;
spectator->perturbative(true);
// update for decaying particles
if(tit!=currentTree()->treelinks().end())
currentTree()->updateLink(tit->first,make_pair(spectator,sp));
}
// incoming emitter
if(iemit<2) {
emitter = findInitialStateLine(currentTree(),
real->bornIncoming()[iemit]->id(),
real->bornIncoming()[iemit]->momentum());
fixInitialStateEmitter(currentTree(),real->incoming()[iemit],real->outgoing()[ig],
emitter,aline,cline,iemit ==0 ? real->x().first :real->x().second);
}
// outgoing emitter
else {
emitter = findFinalStateLine(currentTree(),
real->bornOutgoing()[iemit-real->incoming().size()]->id(),
real->bornOutgoing()[iemit-real->incoming().size()]->momentum());
fixFinalStateEmitter(currentTree(),real->outgoing()[iemit-real->incoming().size()],
real->outgoing()[ig],emitter,aline,cline);
}
}
// decay process
else {
assert(real->spectator()==0);
unsigned int iemit = real->emitter()-real->incoming().size();
int ig = int(real->emitted())-int(real->incoming().size());
ColinePair cline,aline;
// incoming spectator
ShowerProgenitorPtr spectator = findInitialStateLine(currentTree(),
real->bornIncoming()[0]->id(),
real->bornIncoming()[0]->momentum());
fixSpectatorColours(real->incoming()[0],spectator,cline,aline,false);
// find the emitter
ShowerProgenitorPtr emitter =
findFinalStateLine(currentTree(),
real->bornOutgoing()[iemit]->id(),
real->bornOutgoing()[iemit]->momentum());
// recoiling system
for( map<ShowerProgenitorPtr,tShowerParticlePtr>::const_iterator
cjt= currentTree()->outgoingLines().begin();
cjt != currentTree()->outgoingLines().end();++cjt ) {
if(cjt->first==emitter) continue;
cjt->first->progenitor()->transform(real->transformation());
cjt->first->copy()->transform(real->transformation());
}
// sort out the emitter
fixFinalStateEmitter(currentTree(),real->outgoing()[iemit],
real->outgoing()[ig],emitter,aline,cline);
}
}
// clean up the shower tree
_currenttree->resetShowerProducts();
}
diff --git a/Shower/QTilde/QTildeShowerHandler.h b/Shower/QTilde/QTildeShowerHandler.h
--- a/Shower/QTilde/QTildeShowerHandler.h
+++ b/Shower/QTilde/QTildeShowerHandler.h
@@ -1,852 +1,856 @@
// -*- C++ -*-
#ifndef Herwig_QTildeShowerHandler_H
#define Herwig_QTildeShowerHandler_H
//
// This is the declaration of the QTildeShowerHandler class.
//
#include "QTildeShowerHandler.fh"
#include "Herwig/Shower/ShowerHandler.h"
#include "Herwig/Shower/QTilde/Base/ShowerModel.h"
#include "Herwig/Shower/Core/SplittingFunctions/SplittingGenerator.h"
-#include "Herwig/Shower/Core/Base/ShowerTree.h"
+#include "Herwig/Shower/QTilde/Base/ShowerTree.h"
#include "Herwig/Shower/Core/Base/ShowerProgenitor.fh"
-#include "Herwig/Shower/Core/Base/HardTree.h"
+#include "Herwig/Shower/QTilde/Base/HardTree.h"
#include "Herwig/Shower/Core/Base/Branching.h"
#include "Herwig/Shower/QTilde/Base/ShowerVeto.h"
#include "Herwig/Shower/QTilde/Base/FullShowerVeto.h"
#include "Herwig/MatrixElement/HwMEBase.h"
#include "Herwig/Decay/HwDecayerBase.h"
#include "Herwig/MatrixElement/Matchbox/Matching/ShowerApproximation.h"
#include "Herwig/Shower/RealEmissionProcess.h"
#include "Herwig/Utilities/Statistic.h"
namespace Herwig {
using namespace ThePEG;
/**
* The QTildeShowerHandler class.
*
* @see \ref QTildeShowerHandlerInterfaces "The interfaces"
* defined for QTildeShowerHandler.
*/
class QTildeShowerHandler: public ShowerHandler {
public:
/**
* Pointer to an XComb object
*/
typedef Ptr<XComb>::pointer XCPtr;
public:
/** @name Standard constructors and destructors. */
//@{
/**
* The default constructor.
*/
QTildeShowerHandler();
/**
* The destructor.
*/
virtual ~QTildeShowerHandler();
//@}
public:
/**
* At the end of the Showering, transform ShowerParticle objects
* into ThePEG particles and fill the event record with them.
* Notice that the parent/child relationships and the
* transformation from ShowerColourLine objects into ThePEG
* ColourLine ones must be properly handled.
*/
void fillEventRecord();
/**
* Return the relevant hard scale to be used in the profile scales
*/
virtual Energy hardScale() const {
return muPt;
}
/**
* Hook to allow vetoing of event after showering hard sub-process
* as in e.g. MLM merging.
*/
virtual bool showerHardProcessVeto() const { return false; }
/**
* Generate hard emissions for CKKW etc
*/
virtual HardTreePtr generateCKKW(ShowerTreePtr tree) const;
/**
* 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
*/
//@{
/**
* Get the ShowerModel
*/
ShowerModelPtr showerModel() const {return _model;}
/**
* Get the SplittingGenerator
*/
tSplittingGeneratorPtr splittingGenerator() const { return _splittingGenerator; }
/**
* Mode for hard emissions
*/
int hardEmission() const {return _hardEmission;}
//@}
/**
* 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;
}
//@}
protected:
/**
* Perform the shower
*/
void doShowering(bool hard,XCPtr);
/**
* Generate the hard matrix element correction
*/
virtual RealEmissionProcessPtr hardMatrixElementCorrection(bool);
/**
* Generate the hardest emission
*/
virtual void hardestEmission(bool hard);
/**
* Set up for applying a matrix element correction
*/
void setupMECorrection(RealEmissionProcessPtr real);
/**
* 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,
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,
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);
/**
* 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,
Branching fb);
/**
* Truncated shower from a time-like particle
*/
virtual bool truncatedTimeLikeShower(tShowerParticlePtr particle,
HardBranchingPtr branch,
ShowerInteraction type,
Branching fb, bool first);
/**
* Truncated shower from a space-like particle
*/
virtual bool truncatedSpaceLikeShower(tShowerParticlePtr particle,PPtr beam,
HardBranchingPtr branch,
ShowerInteraction type);
/**
* Truncated shower from a time-like particle
*/
virtual bool truncatedSpaceLikeDecayShower(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minimumMass, HardBranchingPtr branch,
ShowerInteraction type, Branching fb);
//@}
/**
* Switches for matrix element corrections
*/
//@{
/**
* Any ME correction?
*/
bool MECOn() const {
return _hardEmission == 1;
}
/**
* Any hard ME correction?
*/
bool hardMEC() const {
return _hardEmission == 1 && (_meCorrMode == 1 || _meCorrMode == 2);
}
/**
* Any soft ME correction?
*/
bool softMEC() const {
return _hardEmission == 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
*/
//@{
/**
* 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 evolver 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);
/**
* Convert the HardTree into an extra shower emission
*/
void convertHardTree(bool hard,ShowerInteraction type);
protected:
/**
* Find the parton extracted from the incoming particle after ISR
*/
PPtr findFirstParton(tPPtr seed) const;
/**
* Fix Remnant connections after ISR
*/
tPPair remakeRemnant(tPPair oldp);
protected:
/**
* Start the shower of a timelike particle
*/
virtual bool startTimeLikeShower(ShowerInteraction);
/**
* Update of the time-like stuff
*/
void updateHistory(tShowerParticlePtr particle);
/**
* Start the shower of a spacelike particle
*/
virtual bool startSpaceLikeShower(PPtr,ShowerInteraction);
/**
* Start the shower of a spacelike particle
*/
virtual bool
startSpaceLikeDecayShower(const ShowerParticle::EvolutionScales & maxScales,
Energy minimumMass,ShowerInteraction);
/**
* Select the branching for the next time-like emission
*/
Branching selectTimeLikeBranching(tShowerParticlePtr particle,
ShowerInteraction type,
HardBranchingPtr branch);
/**
* Select the branching for the next space-like emission in a decay
*/
Branching selectSpaceLikeDecayBranching(tShowerParticlePtr particle,
const ShowerParticle::EvolutionScales & maxScales,
Energy minmass,ShowerInteraction type,
HardBranchingPtr branch);
/**
* 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;}
/**
* Check the flags
*/
void checkFlags();
/**
*
*/
void addFSRUsingDecayPOWHEG(HardTreePtr ISRTree);
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:
/**
* The main method which manages the showering of a subprocess.
*/
virtual tPPair cascade(tSubProPtr sub, XCPtr xcomb);
/**
* Decay a ShowerTree
*/
void decay(ShowerTreePtr tree, ShowerDecayMap & decay);
protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const;
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const;
//@}
protected:
-
- /** @name Standard Interfaced functions. */
- //@{
+
/**
* Initialize this object after the setup phase before saving an
* EventGenerator to disk.
* @throws InitException if object could not be initialized properly.
*/
virtual void doinit();
+
+ /**
+ * Initialize this object. Called in the run phase just before
+ * a run begins.
+ */
+ virtual void doinitrun();
//@}
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
QTildeShowerHandler & operator=(const QTildeShowerHandler &);
private:
/**
* Stuff from the ShowerHandler
*/
//@{
/**
* The ShowerTree for the hard process
*/
ShowerTreePtr hard_;
/**
* The ShowerTree for the decays
*/
ShowerDecayMap decay_;
/**
* The ShowerTrees for which the initial shower
*/
vector<ShowerTreePtr> done_;
//@}
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;
/**
* Control of the reconstruction option
*/
unsigned int _reconOpt;
/**
* 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
*/
ShowerInteraction interaction_;
/**
* Truncated shower switch
*/
bool _trunc_Mode;
/**
* Count of the number of truncated emissions
*/
unsigned int _truncEmissions;
/**
* Mode for the hard emissions
*/
int _hardEmission;
/**
* 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 no warnings about incorrect hard emission
* mode setting have been issued yet
*/
static bool _hardEmissionWarn;
/**
* 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_QTildeShowerHandler_H */
diff --git a/Shower/ShowerHandler.cc b/Shower/ShowerHandler.cc
--- a/Shower/ShowerHandler.cc
+++ b/Shower/ShowerHandler.cc
@@ -1,1102 +1,1097 @@
// -*- C++ -*-
//
// ShowerHandler.cc is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 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 ShowerHandler class.
//
#include "ShowerHandler.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/Interface/Reference.h"
#include "ThePEG/Interface/Parameter.h"
#include "ThePEG/Interface/ParVector.h"
#include "ThePEG/Interface/Switch.h"
#include "ThePEG/Interface/Command.h"
#include "ThePEG/PDF/PartonExtractor.h"
#include "ThePEG/PDF/PartonBinInstance.h"
#include "Herwig/PDT/StandardMatchers.h"
#include "ThePEG/Cuts/Cuts.h"
#include "ThePEG/Handlers/StandardXComb.h"
#include "ThePEG/Utilities/Throw.h"
#include "ThePEG/Utilities/StringUtils.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "ThePEG/Repository/EventGenerator.h"
#include "Herwig/Utilities/EnumParticles.h"
#include "Herwig/PDF/MPIPDF.h"
#include "Herwig/PDF/MinBiasPDF.h"
#include "ThePEG/Handlers/EventHandler.h"
-#include "Herwig/Shower/Core/Base/ShowerTree.h"
#include "Herwig/PDF/HwRemDecayer.h"
#include <cassert>
#include "ThePEG/Utilities/DescribeClass.h"
#include "Herwig/Decay/DecayIntegrator.h"
#include "Herwig/Decay/DecayPhaseSpaceMode.h"
using namespace Herwig;
DescribeClass<ShowerHandler,CascadeHandler>
describeShowerHandler ("Herwig::ShowerHandler","HwShower.so");
ShowerHandler::~ShowerHandler() {}
tShowerHandlerPtr ShowerHandler::currentHandler_ = tShowerHandlerPtr();
void ShowerHandler::doinit() {
CascadeHandler::doinit();
// copy particles to decay before showering from input vector to the
// set used in the simulation
if ( particlesDecayInShower_.empty() ) {
for(unsigned int ix=0;ix<inputparticlesDecayInShower_.size();++ix)
particlesDecayInShower_.insert(abs(inputparticlesDecayInShower_[ix]));
}
- ShowerTree::_vmin2 = vMin_;
- ShowerTree::_spaceTime = includeSpaceTime_;
if ( profileScales() ) {
if ( profileScales()->unrestrictedPhasespace() &&
restrictPhasespace() ) {
generator()->log()
<< "ShowerApproximation warning: The scale profile chosen requires an unrestricted phase space,\n"
<< "however, the phase space was set to be restricted. Will switch to unrestricted phase space.\n"
<< flush;
restrictPhasespace_ = false;
}
}
}
IBPtr ShowerHandler::clone() const {
return new_ptr(*this);
}
IBPtr ShowerHandler::fullclone() const {
return new_ptr(*this);
}
ShowerHandler::ShowerHandler() :
maxtry_(10),maxtryMPI_(10),maxtryDP_(10),maxtryDecay_(100),
factorizationScaleFactor_(1.0),
renormalizationScaleFactor_(1.0),
hardScaleFactor_(1.0),
restrictPhasespace_(true), maxPtIsMuF_(false),
pdfFreezingScale_(2.5*GeV),
doFSR_(true), doISR_(true),
splitHardProcess_(true),
includeSpaceTime_(false), vMin_(0.1*GeV2),
reweight_(1.0) {
inputparticlesDecayInShower_.push_back( 6 ); // top
inputparticlesDecayInShower_.push_back( 23 ); // Z0
inputparticlesDecayInShower_.push_back( 24 ); // W+/-
inputparticlesDecayInShower_.push_back( 25 ); // h0
}
void ShowerHandler::doinitrun(){
CascadeHandler::doinitrun();
//can't use isMPIOn here, because the EventHandler is not set at that stage
if(MPIHandler_) {
MPIHandler_->initialize();
if(MPIHandler_->softInt())
remDec_->initSoftInteractions(MPIHandler_->Ptmin(), MPIHandler_->beta());
}
- ShowerTree::_vmin2 = vMin_;
- ShowerTree::_spaceTime = includeSpaceTime_;
}
void ShowerHandler::dofinish() {
CascadeHandler::dofinish();
if(MPIHandler_) MPIHandler_->finalize();
}
void ShowerHandler::persistentOutput(PersistentOStream & os) const {
os << remDec_ << ounit(pdfFreezingScale_,GeV) << maxtry_
<< maxtryMPI_ << maxtryDP_ << maxtryDecay_
<< inputparticlesDecayInShower_
<< particlesDecayInShower_ << MPIHandler_ << PDFA_ << PDFB_
<< PDFARemnant_ << PDFBRemnant_
<< includeSpaceTime_ << ounit(vMin_,GeV2)
<< factorizationScaleFactor_ << renormalizationScaleFactor_
<< hardScaleFactor_
<< restrictPhasespace_ << maxPtIsMuF_ << hardScaleProfile_
<< showerVariations_ << doFSR_ << doISR_ << splitHardProcess_;
}
void ShowerHandler::persistentInput(PersistentIStream & is, int) {
is >> remDec_ >> iunit(pdfFreezingScale_,GeV) >> maxtry_
>> maxtryMPI_ >> maxtryDP_ >> maxtryDecay_
>> inputparticlesDecayInShower_
>> particlesDecayInShower_ >> MPIHandler_ >> PDFA_ >> PDFB_
>> PDFARemnant_ >> PDFBRemnant_
>> includeSpaceTime_ >> iunit(vMin_,GeV2)
>> factorizationScaleFactor_ >> renormalizationScaleFactor_
>> hardScaleFactor_
>> restrictPhasespace_ >> maxPtIsMuF_ >> hardScaleProfile_
>> showerVariations_ >> doFSR_ >> doISR_ >> splitHardProcess_;
}
void ShowerHandler::Init() {
static ClassDocumentation<ShowerHandler> documentation
("Main driver class for the showering.");
static Reference<ShowerHandler,HwRemDecayer>
interfaceRemDecayer("RemDecayer",
"A reference to the Remnant Decayer object",
&Herwig::ShowerHandler::remDec_,
false, false, true, false);
static Parameter<ShowerHandler,Energy> interfacePDFFreezingScale
("PDFFreezingScale",
"The PDF freezing scale",
&ShowerHandler::pdfFreezingScale_, GeV, 2.5*GeV, 2.0*GeV, 10.0*GeV,
false, false, Interface::limited);
static Parameter<ShowerHandler,unsigned int> interfaceMaxTry
("MaxTry",
"The maximum number of attempts for the main showering loop",
&ShowerHandler::maxtry_, 10, 1, 100,
false, false, Interface::limited);
static Parameter<ShowerHandler,unsigned int> interfaceMaxTryMPI
("MaxTryMPI",
"The maximum number of regeneration attempts for an additional scattering",
&ShowerHandler::maxtryMPI_, 10, 0, 100,
false, false, Interface::limited);
static Parameter<ShowerHandler,unsigned int> interfaceMaxTryDP
("MaxTryDP",
"The maximum number of regeneration attempts for an additional hard scattering",
&ShowerHandler::maxtryDP_, 10, 0, 100,
false, false, Interface::limited);
static ParVector<ShowerHandler,long> interfaceDecayInShower
("DecayInShower",
"PDG codes of the particles to be decayed in the shower",
&ShowerHandler::inputparticlesDecayInShower_, -1, 0l, -10000000l, 10000000l,
false, false, Interface::limited);
static Reference<ShowerHandler,UEBase> interfaceMPIHandler
("MPIHandler",
"The object that administers all additional scatterings.",
&ShowerHandler::MPIHandler_, false, false, true, true);
static Reference<ShowerHandler,PDFBase> interfacePDFA
("PDFA",
"The PDF for beam particle A. Overrides the particle's own PDF setting."
"By default used for both the shower and forced splitting in the remnant",
&ShowerHandler::PDFA_, false, false, true, true, false);
static Reference<ShowerHandler,PDFBase> interfacePDFB
("PDFB",
"The PDF for beam particle B. Overrides the particle's own PDF setting."
"By default used for both the shower and forced splitting in the remnant",
&ShowerHandler::PDFB_, false, false, true, true, false);
static Reference<ShowerHandler,PDFBase> interfacePDFARemnant
("PDFARemnant",
"The PDF for beam particle A used to generate forced splittings of the remnant."
" This overrides both the particle's own PDF setting and the value set by PDFA if used.",
&ShowerHandler::PDFARemnant_, false, false, true, true, false);
static Reference<ShowerHandler,PDFBase> interfacePDFBRemnant
("PDFBRemnant",
"The PDF for beam particle B used to generate forced splittings of the remnant."
" This overrides both the particle's own PDF setting and the value set by PDFB if used.",
&ShowerHandler::PDFBRemnant_, false, false, true, true, false);
static Switch<ShowerHandler,bool> interfaceIncludeSpaceTime
("IncludeSpaceTime",
"Whether to include the model for the calculation of space-time distances",
&ShowerHandler::includeSpaceTime_, false, false, false);
static SwitchOption interfaceIncludeSpaceTimeYes
(interfaceIncludeSpaceTime,
"Yes",
"Include the model",
true);
static SwitchOption interfaceIncludeSpaceTimeNo
(interfaceIncludeSpaceTime,
"No",
"Only include the displacement from the particle-s lifetime for decaying particles",
false);
static Parameter<ShowerHandler,Energy2> interfaceMinimumVirtuality
("MinimumVirtuality",
"The minimum virtuality for the space-time model",
&ShowerHandler::vMin_, GeV2, 0.1*GeV2, 0.0*GeV2, 1000.0*GeV2,
false, false, Interface::limited);
static Parameter<ShowerHandler,double> interfaceFactorizationScaleFactor
("FactorizationScaleFactor",
"The factorization scale factor.",
&ShowerHandler::factorizationScaleFactor_, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerHandler,double> interfaceRenormalizationScaleFactor
("RenormalizationScaleFactor",
"The renormalization scale factor.",
&ShowerHandler::renormalizationScaleFactor_, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerHandler,double> interfaceHardScaleFactor
("HardScaleFactor",
"The hard scale factor.",
&ShowerHandler::hardScaleFactor_, 1.0, 0.0, 0,
false, false, Interface::lowerlim);
static Parameter<ShowerHandler,unsigned int> interfaceMaxTryDecay
("MaxTryDecay",
"The maximum number of attempts to generate a decay",
&ShowerHandler::maxtryDecay_, 200, 10, 0,
false, false, Interface::lowerlim);
static Reference<ShowerHandler,HardScaleProfile> interfaceHardScaleProfile
("HardScaleProfile",
"The hard scale profile to use.",
&ShowerHandler::hardScaleProfile_, false, false, true, true, false);
static Switch<ShowerHandler,bool> interfaceMaxPtIsMuF
("MaxPtIsMuF",
"",
&ShowerHandler::maxPtIsMuF_, false, false, false);
static SwitchOption interfaceMaxPtIsMuFYes
(interfaceMaxPtIsMuF,
"Yes",
"",
true);
static SwitchOption interfaceMaxPtIsMuFNo
(interfaceMaxPtIsMuF,
"No",
"",
false);
static Switch<ShowerHandler,bool> interfaceRestrictPhasespace
("RestrictPhasespace",
"Switch on or off phasespace restrictions",
&ShowerHandler::restrictPhasespace_, true, false, false);
static SwitchOption interfaceRestrictPhasespaceYes
(interfaceRestrictPhasespace,
"Yes",
"Perform phasespace restrictions",
true);
static SwitchOption interfaceRestrictPhasespaceNo
(interfaceRestrictPhasespace,
"No",
"Do not perform phasespace restrictions",
false);
static Command<ShowerHandler> interfaceAddVariation
("AddVariation",
"Add a shower variation.",
&ShowerHandler::doAddVariation, false);
static Switch<ShowerHandler,bool> interfaceDoFSR
("DoFSR",
"Switch on or off final state radiation.",
&ShowerHandler::doFSR_, true, false, false);
static SwitchOption interfaceDoFSRYes
(interfaceDoFSR,
"Yes",
"Switch on final state radiation.",
true);
static SwitchOption interfaceDoFSRNo
(interfaceDoFSR,
"No",
"Switch off final state radiation.",
false);
static Switch<ShowerHandler,bool> interfaceDoISR
("DoISR",
"Switch on or off initial state radiation.",
&ShowerHandler::doISR_, true, false, false);
static SwitchOption interfaceDoISRYes
(interfaceDoISR,
"Yes",
"Switch on initial state radiation.",
true);
static SwitchOption interfaceDoISRNo
(interfaceDoISR,
"No",
"Switch off initial state radiation.",
false);
static Switch<ShowerHandler,bool> interfaceSplitHardProcess
("SplitHardProcess",
"Whether or not to try and split the hard process into production and decay processes",
&ShowerHandler::splitHardProcess_, true, false, false);
static SwitchOption interfaceSplitHardProcessYes
(interfaceSplitHardProcess,
"Yes",
"Split the hard process",
true);
static SwitchOption interfaceSplitHardProcessNo
(interfaceSplitHardProcess,
"No",
"Don't split the hard process",
false);
}
Energy ShowerHandler::hardScale() const {
assert(false);
}
void ShowerHandler::cascade() {
useMe();
// Initialise the weights in the event object
// so that any variations are output regardless of
// whether showering occurs for the given event
initializeWeights();
// get the PDF's from ThePEG (if locally overridden use the local versions)
tcPDFPtr first = PDFA_ ? tcPDFPtr(PDFA_) : firstPDF().pdf();
tcPDFPtr second = PDFB_ ? tcPDFPtr(PDFB_) : secondPDF().pdf();
resetPDFs(make_pair(first,second));
// set the PDFs for the remnant
if( ! rempdfs_.first)
rempdfs_.first = PDFARemnant_ ? PDFPtr(PDFARemnant_) : const_ptr_cast<PDFPtr>(first);
if( ! rempdfs_.second)
rempdfs_.second = PDFBRemnant_ ? PDFPtr(PDFBRemnant_) : const_ptr_cast<PDFPtr>(second);
// get the incoming partons
tPPair incomingPartons =
eventHandler()->currentCollision()->primarySubProcess()->incoming();
// and the parton bins
PBIPair incomingBins =
make_pair(lastExtractor()->partonBinInstance(incomingPartons.first),
lastExtractor()->partonBinInstance(incomingPartons.second));
// and the incoming hadrons
tPPair incomingHadrons =
eventHandler()->currentCollision()->incoming();
remnantDecayer()->setHadronContent(incomingHadrons);
// check if incoming hadron == incoming parton
// and get the incoming hadron if exists or parton otherwise
incoming_ = make_pair(incomingBins.first ?
incomingBins.first ->particle() : incomingPartons.first,
incomingBins.second ?
incomingBins.second->particle() : incomingPartons.second);
// check the collision is of the beam particles
// and if not boost collision to the right frame
// i.e. the hadron-hadron CMF of the collision
bool btotal(false);
LorentzRotation rtotal;
if(incoming_.first != incomingHadrons.first ||
incoming_.second != incomingHadrons.second ) {
btotal = true;
boostCollision(false);
}
// set the current ShowerHandler
setCurrentHandler();
// first shower the hard process
try {
SubProPtr sub = eventHandler()->currentCollision()->primarySubProcess();
incomingPartons = cascade(sub,lastXCombPtr());
}
catch(ShowerTriesVeto &veto){
throw Exception() << "Failed to generate the shower after "
<< veto.tries
<< " attempts in ShowerHandler::cascade()"
<< Exception::eventerror;
}
if(showerHardProcessVeto()) throw Veto();
// if a non-hadron collision return (both incoming non-hadronic)
if( ( !incomingBins.first||
!isResolvedHadron(incomingBins.first ->particle()))&&
( !incomingBins.second||
!isResolvedHadron(incomingBins.second->particle()))) {
// boost back to lab if needed
if(btotal) boostCollision(true);
// perform the reweighting for the hard process shower
combineWeights();
// unset the current ShowerHandler
unSetCurrentHandler();
return;
}
// get the remnants for hadronic collision
pair<tRemPPtr,tRemPPtr> remnants(getRemnants(incomingBins));
// set the starting scale of the forced splitting to the PDF freezing scale
remnantDecayer()->initialize(remnants, incoming_, *currentStep(), pdfFreezingScale());
// do the first forcedSplitting
try {
remnantDecayer()->doSplit(incomingPartons, make_pair(rempdfs_.first,rempdfs_.second), true);
}
catch (ExtraScatterVeto) {
throw Exception() << "Remnant extraction failed in "
<< "ShowerHandler::cascade() from primary interaction"
<< Exception::eventerror;
}
// perform the reweighting for the hard process shower
combineWeights();
// if no MPI return
if( !isMPIOn() ) {
remnantDecayer()->finalize();
// boost back to lab if needed
if(btotal) boostCollision(true);
// unset the current ShowerHandler
unSetCurrentHandler();
return;
}
// generate the multiple scatters use modified pdf's now:
setMPIPDFs();
// additional "hard" processes
unsigned int tries(0);
// This is the loop over additional hard scatters (most of the time
// only one, but who knows...)
for(unsigned int i=1; i <= getMPIHandler()->additionalHardProcs(); i++){
//counter for regeneration
unsigned int multSecond = 0;
// generate the additional scatters
while( multSecond < getMPIHandler()->multiplicity(i) ) {
// generate the hard scatter
tStdXCombPtr lastXC = getMPIHandler()->generate(i);
SubProPtr sub = lastXC->construct();
// add to the Step
newStep()->addSubProcess(sub);
// increment the counters
tries++;
multSecond++;
if(tries == maxtryDP_)
throw Exception() << "Failed to establish the requested number "
<< "of additional hard processes. If this error "
<< "occurs often, your selection of additional "
<< "scatter is probably unphysical"
<< Exception::eventerror;
// Generate the shower. If not possible veto the event
try {
incomingPartons = cascade(sub,lastXC);
}
catch(ShowerTriesVeto &veto){
throw Exception() << "Failed to generate the shower of "
<< "a secondary hard process after "
<< veto.tries
<< " attempts in Evolver::showerHardProcess()"
<< Exception::eventerror;
}
try {
// do the forcedSplitting
remnantDecayer()->doSplit(incomingPartons, make_pair(remmpipdfs_.first,remmpipdfs_.second), false);
}
catch(ExtraScatterVeto){
//remove all particles associated with the subprocess
newStep()->removeParticle(incomingPartons.first);
newStep()->removeParticle(incomingPartons.second);
//remove the subprocess from the list
newStep()->removeSubProcess(sub);
//regenerate the scattering
multSecond--;
continue;
}
// connect with the remnants but don't set Remnant colour,
// because that causes problems due to the multiple colour lines.
if ( !remnants.first ->extract(incomingPartons.first , false) ||
!remnants.second->extract(incomingPartons.second, false) )
throw Exception() << "Remnant extraction failed in "
<< "ShowerHandler::cascade() for additional scatter"
<< Exception::runerror;
}
// perform the reweighting for the additional hard scatter shower
combineWeights();
}
// the underlying event processes
unsigned int ptveto(1), veto(0);
unsigned int max(getMPIHandler()->multiplicity());
for(unsigned int i=0; i<max; i++) {
// check how often this scattering has been regenerated
if(veto > maxtryMPI_) break;
//generate PSpoint
tStdXCombPtr lastXC = getMPIHandler()->generate();
SubProPtr sub = lastXC->construct();
//If Algorithm=1 additional scatters of the signal type
// with pt > ptmin have to be vetoed
//with probability 1/(m+1), where m is the number of occurances in this event
if( getMPIHandler()->Algorithm() == 1 ){
//get the pT
Energy pt = sub->outgoing().front()->momentum().perp();
if(pt > getMPIHandler()->PtForVeto() && UseRandom::rnd() < 1./(ptveto+1) ){
ptveto++;
i--;
continue;
}
}
// add to the SubProcess to the step
newStep()->addSubProcess(sub);
// Run the Shower. If not possible veto the scattering
try {
incomingPartons = cascade(sub,lastXC);
}
// discard this extra scattering, but try the next one
catch(ShowerTriesVeto) {
newStep()->removeSubProcess(sub);
//regenerate the scattering
veto++;
i--;
continue;
}
try{
//do the forcedSplitting
remnantDecayer()->doSplit(incomingPartons, make_pair(remmpipdfs_.first,remmpipdfs_.second), false);
}
catch (ExtraScatterVeto) {
//remove all particles associated with the subprocess
newStep()->removeParticle(incomingPartons.first);
newStep()->removeParticle(incomingPartons.second);
//remove the subprocess from the list
newStep()->removeSubProcess(sub);
//regenerate the scattering
veto++;
i--;
continue;
}
//connect with the remnants but don't set Remnant colour,
//because that causes problems due to the multiple colour lines.
if ( !remnants.first ->extract(incomingPartons.first , false) ||
!remnants.second->extract(incomingPartons.second, false) )
throw Exception() << "Remnant extraction failed in "
<< "ShowerHandler::cascade() for MPI hard scattering"
<< Exception::runerror;
//reset veto counter
veto = 0;
// perform the reweighting for the MPI process shower
combineWeights();
}
// finalize the remnants
remnantDecayer()->finalize(getMPIHandler()->colourDisrupt(),
getMPIHandler()->softMultiplicity());
// boost back to lab if needed
if(btotal) boostCollision(true);
// unset the current ShowerHandler
unSetCurrentHandler();
getMPIHandler()->clean();
resetPDFs(make_pair(first,second));
}
void ShowerHandler::initializeWeights() {
if ( !showerVariations().empty() ) {
tEventPtr event = eventHandler()->currentEvent();
for ( map<string,ShowerVariation>::const_iterator var =
showerVariations().begin();
var != showerVariations().end(); ++var ) {
// Check that this is behaving as intended
//map<string,double>::iterator wi = event->optionalWeights().find(var->first);
//assert(wi == event->optionalWeights().end() );
event->optionalWeights()[var->first] = 1.0;
currentWeights_[var->first] = 1.0;
}
}
reweight_ = 1.0;
}
void ShowerHandler::resetWeights() {
for ( map<string,double>::iterator w = currentWeights_.begin();
w != currentWeights_.end(); ++w ) {
w->second = 1.0;
}
reweight_ = 1.0;
}
void ShowerHandler::combineWeights() {
tEventPtr event = eventHandler()->currentEvent();
for ( map<string,double>::const_iterator w =
currentWeights_.begin(); w != currentWeights_.end(); ++w ) {
map<string,double>::iterator ew = event->optionalWeights().find(w->first);
if ( ew != event->optionalWeights().end() )
ew->second *= w->second;
else {
assert(false && "Weight name unknown.");
//event->optionalWeights()[w->first] = w->second;
}
}
if ( reweight_ != 1.0 ) {
Ptr<StandardEventHandler>::tptr eh =
dynamic_ptr_cast<Ptr<StandardEventHandler>::tptr>(eventHandler());
if ( !eh ) {
throw Exception() << "ShowerHandler::combineWeights() : Cross section reweighting "
<< "through the shower is currently only available with standard "
<< "event generators" << Exception::runerror;
}
eh->reweight(reweight_);
}
}
string ShowerHandler::doAddVariation(string in) {
if ( in.empty() )
return "expecting a name and a variation specification";
string name = StringUtils::car(in);
ShowerVariation var;
string res = var.fromInFile(StringUtils::cdr(in));
if ( res.empty() ) {
if ( !var.firstInteraction && !var.secondaryInteractions ) {
// TODO what about decay showers?
return "variation does not apply to any shower";
}
if ( var.renormalizationScaleFactor == 1.0 &&
var.factorizationScaleFactor == 1.0 ) {
return "variation does not vary anything";
}
/*
Repository::clog() << "adding a variation with tag '" << name << "' using\nxir = "
<< var.renormalizationScaleFactor
<< " xif = "
<< var.factorizationScaleFactor
<< "\napplying to:\n"
<< "first interaction = " << var.firstInteraction << " "
<< "secondary interactions = " << var.secondaryInteractions << "\n"
<< flush;
*/
showerVariations()[name] = var;
}
return res;
}
tPPair ShowerHandler::cascade(tSubProPtr, XCPtr) {
assert(false);
}
ShowerHandler::RemPair
ShowerHandler::getRemnants(PBIPair incomingBins) {
RemPair remnants;
// first beam particle
if(incomingBins.first&&!incomingBins.first->remnants().empty()) {
remnants.first =
dynamic_ptr_cast<tRemPPtr>(incomingBins.first->remnants()[0] );
if(remnants.first) {
ParticleVector children=remnants.first->children();
for(unsigned int ix=0;ix<children.size();++ix) {
if(children[ix]->dataPtr()==remnants.first->dataPtr())
remnants.first = dynamic_ptr_cast<RemPPtr>(children[ix]);
}
//remove existing colour lines from the remnants
if(remnants.first->colourLine())
remnants.first->colourLine()->removeColoured(remnants.first);
if(remnants.first->antiColourLine())
remnants.first->antiColourLine()->removeAntiColoured(remnants.first);
}
}
// seconnd beam particle
if(incomingBins.second&&!incomingBins. second->remnants().empty()) {
remnants.second =
dynamic_ptr_cast<tRemPPtr>(incomingBins.second->remnants()[0] );
if(remnants.second) {
ParticleVector children=remnants.second->children();
for(unsigned int ix=0;ix<children.size();++ix) {
if(children[ix]->dataPtr()==remnants.second->dataPtr())
remnants.second = dynamic_ptr_cast<RemPPtr>(children[ix]);
}
//remove existing colour lines from the remnants
if(remnants.second->colourLine())
remnants.second->colourLine()->removeColoured(remnants.second);
if(remnants.second->antiColourLine())
remnants.second->antiColourLine()->removeAntiColoured(remnants.second);
}
}
assert(remnants.first || remnants.second);
return remnants;
}
namespace {
void addChildren(tPPtr in,set<tPPtr> & particles) {
particles.insert(in);
for(unsigned int ix=0;ix<in->children().size();++ix)
addChildren(in->children()[ix],particles);
}
}
void ShowerHandler::boostCollision(bool boost) {
// calculate boost from lab to rest
if(!boost) {
Lorentz5Momentum ptotal=incoming_.first ->momentum()+incoming_.second->momentum();
boost_ = LorentzRotation(-ptotal.boostVector());
Axis axis((boost_*incoming_.first ->momentum()).vect().unit());
if(axis.perp2()>0.) {
double sinth(sqrt(sqr(axis.x())+sqr(axis.y())));
boost_.rotate(-acos(axis.z()),Axis(-axis.y()/sinth,axis.x()/sinth,0.));
}
}
// first call performs the boost and second inverse
// get the particles to be boosted
set<tPPtr> particles;
addChildren(incoming_.first,particles);
addChildren(incoming_.second,particles);
// apply the boost
for(set<tPPtr>::const_iterator cit=particles.begin();
cit!=particles.end();++cit) {
(*cit)->transform(boost_);
}
if(!boost) boost_.invert();
}
void ShowerHandler::setMPIPDFs() {
if ( !mpipdfs_.first ) {
// first have to check for MinBiasPDF
tcMinBiasPDFPtr first = dynamic_ptr_cast<tcMinBiasPDFPtr>(firstPDF().pdf());
if(first)
mpipdfs_.first = new_ptr(MPIPDF(first->originalPDF()));
else
mpipdfs_.first = new_ptr(MPIPDF(firstPDF().pdf()));
}
if ( !mpipdfs_.second ) {
tcMinBiasPDFPtr second = dynamic_ptr_cast<tcMinBiasPDFPtr>(secondPDF().pdf());
if(second)
mpipdfs_.second = new_ptr(MPIPDF(second->originalPDF()));
else
mpipdfs_.second = new_ptr(MPIPDF(secondPDF().pdf()));
}
if( !remmpipdfs_.first ) {
tcMinBiasPDFPtr first = dynamic_ptr_cast<tcMinBiasPDFPtr>(rempdfs_.first);
if(first)
remmpipdfs_.first = new_ptr(MPIPDF(first->originalPDF()));
else
remmpipdfs_.first = new_ptr(MPIPDF(rempdfs_.first));
}
if( !remmpipdfs_.second ) {
tcMinBiasPDFPtr second = dynamic_ptr_cast<tcMinBiasPDFPtr>(rempdfs_.second);
if(second)
remmpipdfs_.second = new_ptr(MPIPDF(second->originalPDF()));
else
remmpipdfs_.second = new_ptr(MPIPDF(rempdfs_.second));
}
// reset the PDFs stored in the base class
resetPDFs(mpipdfs_);
}
bool ShowerHandler::isResolvedHadron(tPPtr particle) {
if(!HadronMatcher::Check(particle->data())) return false;
for(unsigned int ix=0;ix<particle->children().size();++ix) {
if(particle->children()[ix]->id()==ParticleID::Remnant) return true;
}
return false;
}
namespace {
bool decayProduct(tSubProPtr subProcess,
tPPtr particle) {
// must be time-like and not incoming
if(particle->momentum().m2()<=ZERO||
particle == subProcess->incoming().first||
particle == subProcess->incoming().second) return false;
// if only 1 outgoing and this is it
if(subProcess->outgoing().size()==1 &&
subProcess->outgoing()[0]==particle) return true;
// must not be the s-channel intermediate otherwise
if(find(subProcess->incoming().first->children().begin(),
subProcess->incoming().first->children().end(),particle)!=
subProcess->incoming().first->children().end()&&
find(subProcess->incoming().second->children().begin(),
subProcess->incoming().second->children().end(),particle)!=
subProcess->incoming().second->children().end()&&
subProcess->incoming().first ->children().size()==1&&
subProcess->incoming().second->children().size()==1)
return false;
// if non-coloured this is enough
if(!particle->dataPtr()->coloured()) return true;
// if coloured must be unstable
if(particle->dataPtr()->stable()) return false;
// must not have same particle type as a child
int id = particle->id();
for(unsigned int ix=0;ix<particle->children().size();++ix)
if(particle->children()[ix]->id()==id) return false;
// otherwise its a decaying particle
return true;
}
PPtr findParent(PPtr original, bool & isHard,
set<PPtr> outgoingset,
tSubProPtr subProcess) {
PPtr parent=original;
isHard |=(outgoingset.find(original) != outgoingset.end());
if(!original->parents().empty()) {
PPtr orig=original->parents()[0];
if(decayProduct(subProcess,orig))
parent=findParent(orig,isHard,outgoingset,subProcess);
}
return parent;
}
}
void ShowerHandler::findDecayProducts(PPtr in,PerturbativeProcessPtr hard,
DecayProcessMap & decay) const {
ParticleVector children=in->children();
for(ParticleVector::const_iterator it=children.begin(); it!=children.end();++it) {
// if decayed or should be decayed in shower make the PerturbaitveProcess
bool radiates = false;
if(!(**it).children().empty()) {
// remove d,u,s,c,b quarks and leptons other than on-shell taus
if( StandardQCDPartonMatcher::Check((**it).id()) ||
( LeptonMatcher::Check((**it).id()) && !(abs((**it).id())==ParticleID::tauminus &&
abs((**it).mass()-(**it).dataPtr()->mass())<MeV))) {
radiates = true;
}
else {
bool foundParticle(false),foundGauge(false);
for(unsigned int iy=0;iy<(**it).children().size();++iy) {
if((**it).children()[iy]->id()==(**it).id()) {
foundParticle = true;
}
else if((**it).children()[iy]->id()==ParticleID::g ||
(**it).children()[iy]->id()==ParticleID::gamma) {
foundGauge = true;
}
}
radiates = foundParticle && foundGauge;
}
}
if(radiates) {
findDecayProducts(*it,hard,decay);
}
else if(!(**it).children().empty()||
(decaysInShower((**it).id())&&!(**it).dataPtr()->stable())) {
createDecayProcess(*it,hard,decay);
}
else {
hard->outgoing().push_back(make_pair(*it,PerturbativeProcessPtr()));
}
}
}
void ShowerHandler::splitHardProcess(tPVector tagged, PerturbativeProcessPtr & hard,
DecayProcessMap & decay) const {
// temporary storage of the particles
set<PPtr> hardParticles;
// tagged particles in a set
set<PPtr> outgoingset(tagged.begin(),tagged.end());
bool isHard=false;
// loop over the tagged particles
for (tParticleVector::const_iterator taggedP = tagged.begin();
taggedP != tagged.end(); ++taggedP) {
// skip remnants
if (eventHandler()->currentCollision()&&
eventHandler()->currentCollision()->isRemnant(*taggedP)) continue;
// find the parent and whether its a decaying particle
bool isDecayProd=false;
// check if hard
isHard |=(outgoingset.find(*taggedP) != outgoingset.end());
if(splitHardProcess_) {
tPPtr parent = *taggedP;
// check if from s channel decaying colourless particle
while(parent&&!parent->parents().empty()&&!isDecayProd) {
parent = parent->parents()[0];
if(parent == subProcess_->incoming().first ||
parent == subProcess_->incoming().second ) break;
isDecayProd = decayProduct(subProcess_,parent);
}
if (isDecayProd)
hardParticles.insert(findParent(parent,isHard,outgoingset,subProcess_));
}
if (!isDecayProd)
hardParticles.insert(*taggedP);
}
// there must be something to shower
if(hardParticles.empty())
throw Exception() << "No particles to shower in "
<< "ShowerHandler::splitHardProcess()"
<< Exception::eventerror;
// must be a hard process
if(!isHard)
throw Exception() << "Starting on decay not yet implemented in "
<< "ShowerHandler::splitHardProcess()"
<< Exception::runerror;
// create the hard process
hard = new_ptr(PerturbativeProcess());
// incoming particles
hard->incoming().push_back(make_pair(subProcess_->incoming().first ,PerturbativeProcessPtr()));
hard->incoming().push_back(make_pair(subProcess_->incoming().second,PerturbativeProcessPtr()));
// outgoing particles
for(set<PPtr>::const_iterator it=hardParticles.begin();it!=hardParticles.end();++it) {
// if decayed or should be decayed in shower make the tree
PPtr orig = *it;
bool radiates = false;
if(!orig->children().empty()) {
// remove d,u,s,c,b quarks and leptons other than on-shell taus
if( StandardQCDPartonMatcher::Check(orig->id()) ||
( LeptonMatcher::Check(orig->id()) &&
!(abs(orig->id())==ParticleID::tauminus && abs(orig->mass()-orig->dataPtr()->mass())<MeV))) {
radiates = true;
}
else {
bool foundParticle(false),foundGauge(false);
for(unsigned int iy=0;iy<orig->children().size();++iy) {
if(orig->children()[iy]->id()==orig->id()) {
foundParticle = true;
}
else if(orig->children()[iy]->id()==ParticleID::g ||
orig->children()[iy]->id()==ParticleID::gamma) {
foundGauge = true;
}
}
radiates = foundParticle && foundGauge;
}
}
if(radiates) {
findDecayProducts(orig,hard,decay);
}
else if(!(**it).children().empty()||
(decaysInShower((**it).id())&&!(**it).dataPtr()->stable())) {
createDecayProcess(*it,hard,decay);
}
else {
hard->outgoing().push_back(make_pair(*it,PerturbativeProcessPtr()));
}
}
}
void ShowerHandler::createDecayProcess(PPtr in,PerturbativeProcessPtr hard, DecayProcessMap & decay) const {
// there must be an incoming particle
assert(in);
// create the new process and connect with the parent
PerturbativeProcessPtr newDecay=new_ptr(PerturbativeProcess());
newDecay->incoming().push_back(make_pair(in,hard));
Energy width=in->dataPtr()->generateWidth(in->mass());
decay.insert(make_pair(width,newDecay));
hard->outgoing().push_back(make_pair(in,newDecay));
// we need to deal with the decay products if decayed
ParticleVector children = in->children();
if(!children.empty()) {
for(ParticleVector::const_iterator it = children.begin();
it!= children.end(); ++it) {
// if decayed or should be decayed in shower make the tree
in->abandonChild(*it);
bool radiates = false;
if(!(**it).children().empty()) {
if(StandardQCDPartonMatcher::Check((**it).id())||
(LeptonMatcher::Check((**it).id())&& !(abs((**it).id())==ParticleID::tauminus &&
abs((**it).mass()-(**it).dataPtr()->mass())<MeV))) {
radiates = true;
}
else {
bool foundParticle(false),foundGauge(false);
for(unsigned int iy=0;iy<(**it).children().size();++iy) {
if((**it).children()[iy]->id()==(**it).id()) {
foundParticle = true;
}
else if((**it).children()[iy]->id()==ParticleID::g ||
(**it).children()[iy]->id()==ParticleID::gamma) {
foundGauge = true;
}
}
radiates = foundParticle && foundGauge;
}
// finally assume all non-decaying particles are in this class
// pr 27/11/15 not sure about this bit
// if(!radiates) {
// radiates = !decaysInShower((**it).id());
// }
}
if(radiates) {
findDecayProducts(*it,newDecay,decay);
}
else if(!(**it).children().empty()||
(decaysInShower((**it).id())&&!(**it).dataPtr()->stable())) {
createDecayProcess(*it,newDecay,decay);
}
else {
newDecay->outgoing().push_back(make_pair(*it,PerturbativeProcessPtr()));
}
}
}
}
tDMPtr ShowerHandler::decay(PerturbativeProcessPtr process,
DecayProcessMap & decayMap,
bool radPhotons ) const {
PPtr parent = process->incoming()[0].first;
assert(parent);
if(parent->spinInfo()) parent->spinInfo()->decay(true);
unsigned int ntry = 0;
ParticleVector children;
tDMPtr dm = DMPtr();
while (true) {
// exit if fails
if (++ntry>=maxtryDecay_)
throw Exception() << "Failed to perform decay in ShowerHandler::decay()"
<< " after " << maxtryDecay_
<< " attempts for " << parent->PDGName()
<< Exception::eventerror;
// select decay mode
dm = parent->data().selectMode(*parent);
if(!dm)
throw Exception() << "Failed to select decay mode in ShowerHandler::decay()"
<< "for " << parent->PDGName()
<< Exception::eventerror;
if(!dm->decayer())
throw Exception() << "No Decayer for selected decay mode "
<< " in ShowerHandler::decay()"
<< Exception::runerror;
// start of try block
try {
children = dm->decayer()->decay(*dm, *parent);
// if no children have another go
if(children.empty()) continue;
if(radPhotons){
// generate radiation in the decay
tDecayIntegratorPtr hwdec=dynamic_ptr_cast<tDecayIntegratorPtr>(dm->decayer());
if (hwdec && hwdec->canGeneratePhotons())
children = hwdec->generatePhotons(*parent,children);
}
// set up parent
parent->decayMode(dm);
// add children
for (unsigned int i = 0, N = children.size(); i < N; ++i ) {
children[i]->setLabVertex(parent->labDecayVertex());
//parent->addChild(children[i]);
}
// if succeeded break out of loop
break;
}
catch(Veto) {
}
}
assert(!children.empty());
for(ParticleVector::const_iterator it = children.begin();
it!= children.end(); ++it) {
if(!(**it).children().empty()||
(decaysInShower((**it).id())&&!(**it).dataPtr()->stable())) {
createDecayProcess(*it,process,decayMap);
}
else {
process->outgoing().push_back(make_pair(*it,PerturbativeProcessPtr()));
}
}
return dm;
}
// Note: The tag must be constructed from an ordered particle container.
tDMPtr ShowerHandler::findDecayMode(const string & tag) const {
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;
}
/**
* Operator for the particle ordering
* @param p1 The first ParticleData object
* @param p2 The second ParticleData object
*/
bool ShowerHandler::ParticleOrdering::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() );
}
diff --git a/Shower/ShowerHandler.h b/Shower/ShowerHandler.h
--- a/Shower/ShowerHandler.h
+++ b/Shower/ShowerHandler.h
@@ -1,822 +1,839 @@
// -*- C++ -*-
//
// ShowerHandler.h is a part of Herwig - A multi-purpose Monte Carlo event generator
// Copyright (C) 2002-2017 The Herwig Collaboration
//
// Herwig is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef HERWIG_ShowerHandler_H
#define HERWIG_ShowerHandler_H
//
// This is the declaration of the ShowerHandler class.
//
#include "ThePEG/Handlers/EventHandler.h"
#include "ThePEG/Handlers/CascadeHandler.h"
#include "ShowerVariation.h"
#include "Herwig/PDF/HwRemDecayer.fh"
#include "ThePEG/EventRecord/RemnantParticle.fh"
#include "UEBase.h"
#include "PerturbativeProcess.h"
#include "Herwig/MatrixElement/Matchbox/Matching/HardScaleProfile.h"
#include "ShowerHandler.fh"
namespace Herwig {
using namespace ThePEG;
/** \ingroup Shower
*
* This class is the main driver of the shower: it is responsible for
* the proper handling of all other specific collaborating classes
* and for the storing of the produced particles in the event record.
*
* @see \ref ShowerHandlerInterfaces "The interfaces"
*
* @see ThePEG::CascadeHandler
* @see MPIHandler
* @see HwRemDecayer
*/
class ShowerHandler: public CascadeHandler {
public:
/**
* Typedef for a pair of ThePEG::RemnantParticle pointers.
*/
typedef pair<tRemPPtr, tRemPPtr> RemPair;
public:
/**
* Default constructor
*/
ShowerHandler();
/**
* Destructor
*/
virtual ~ShowerHandler();
public:
/**
* The main method which manages the multiple interactions and starts
* the shower by calling cascade(sub, lastXC).
*/
virtual void cascade();
/**
* pointer to "this", the current ShowerHandler.
*/
static const tShowerHandlerPtr currentHandler() {
assert(currentHandler_);
return currentHandler_;
}
public:
/**
* Hook to allow vetoing of event after showering hard sub-process
* as in e.g. MLM merging.
*/
virtual bool showerHardProcessVeto() const { return false; }
/**
* Return true, if this cascade handler will perform reshuffling from hard
* process masses.
*/
virtual bool isReshuffling() const { return true; }
/**
* Return true, if the shower handler can generate a truncated
* shower for POWHEG style events generated using Matchbox
*/
virtual bool canHandleMatchboxTrunc() const { return false; }
/**
* Get the PDF freezing scale
*/
Energy pdfFreezingScale() const { return pdfFreezingScale_; }
/**
* Get the local PDFs.
*/
PDFPtr getPDFA() const {return PDFA_;}
/**
* Get the local PDFs.
*/
PDFPtr getPDFB() const {return PDFB_;}
/**
* Return true if currently the primary subprocess is showered.
*/
bool firstInteraction() const {
if (!eventHandler()->currentCollision())return true;
return ( subProcess_ ==
eventHandler()->currentCollision()->primarySubProcess() );
}
/**
* Return the remnant decayer.
*/
tHwRemDecPtr remnantDecayer() const { return remDec_; }
/**
* Split the hard process into production and decays
* @param tagged The tagged particles from the StepHandler
* @param hard The hard perturbative process
* @param decay The decay particles
*/
void splitHardProcess(tPVector tagged, PerturbativeProcessPtr & hard,
DecayProcessMap & decay) const;
/**
* Information if the Showerhandler splits the hard process.
*/
bool doesSplitHardProcess()const {return splitHardProcess_;}
/**
* Decay a particle.
* radPhotons switches the generation of photon
* radiation on/off.
* Required for Dipole Shower but not QTilde Shower.
*/
tDMPtr decay(PerturbativeProcessPtr,
DecayProcessMap & decay,
bool radPhotons = false) const;
/**
* Cached lookup of decay modes.
* Generator::findDecayMode() is not efficient.
*/
tDMPtr findDecayMode(const string & tag) const;
/**
* A struct to order the particles in the same way as in the DecayMode's
*/
struct ParticleOrdering {
bool operator() (tcPDPtr p1, tcPDPtr p2);
};
/**
* A container for ordered particles required
* for constructing tags for decay mode lookup.
*/
typedef multiset<tcPDPtr,ParticleOrdering> OrderedParticles;
public:
/**
* @name Switches for initial- and final-state radiation
*/
//@{
/**
* Switch for any radiation
*/
bool doRadiation() const {return doFSR_ || doISR_;}
/**
* Switch on or off final state radiation.
*/
bool doFSR() const { return doFSR_;}
/**
* Switch on or off initial state radiation.
*/
bool doISR() const { return doISR_;}
//@}
public:
/**
* @name Switches for scales
*/
//@{
/**
* Return true if maximum pt should be deduced from the factorization scale
*/
bool hardScaleIsMuF() const { return maxPtIsMuF_; }
/**
* The factorization scale factor.
*/
double factorizationScaleFactor() const {
return factorizationScaleFactor_;
}
/**
* The renormalization scale factor.
*/
double renFac() const {
return renormalizationScaleFactor_;
}
/**
* The factorization scale factor.
*/
double facFac() const {
return factorizationScaleFactor_;
}
/**
* The renormalization scale factor.
*/
double renormalizationScaleFactor() const {
return renormalizationScaleFactor_;
}
/**
* The scale factor for the hard scale
*/
double hardScaleFactor() const {
return hardScaleFactor_;
}
/**
* Return true, if the phase space restrictions of the dipole shower should
* be applied.
*/
bool restrictPhasespace() const { return restrictPhasespace_; }
/**
* Return profile scales
*/
Ptr<HardScaleProfile>::tptr profileScales() const { return hardScaleProfile_; }
/**
* Return the relevant hard scale to be used in the profile scales
*/
virtual Energy hardScale() const;
//@}
public:
/**
* Access the shower variations
*/
map<string,ShowerVariation>& showerVariations() {
return showerVariations_;
}
/**
* Return the shower variations
*/
const map<string,ShowerVariation>& showerVariations() const {
return showerVariations_;
}
/**
* Access the current Weights
*/
map<string,double>& currentWeights() {
return currentWeights_;
}
/**
* Return the current Weights
*/
const map<string,double>& currentWeights() const {
return currentWeights_;
}
/**
* Change the current reweighting factor
*/
void reweight(double w) {
reweight_ = w;
}
/**
* Return the current reweighting factor
*/
double reweight() const {
return reweight_;
}
public:
/**
* struct that is used to catch exceptions which are thrown
* due to energy conservation issues of additional scatters
*/
struct ExtraScatterVeto {};
/**
* struct that is used to catch exceptions which are thrown
* due to fact that the Shower has been invoked more than
* a defined threshold on a certain configuration
*/
struct ShowerTriesVeto {
/** variable to store the number of attempts */
const int tries;
/** constructor */
ShowerTriesVeto(int t) : tries(t) {}
};
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 Functions to perform the cascade
*/
//@{
/**
* The main method which manages the showering of a subprocess.
*/
virtual tPPair cascade(tSubProPtr sub, XCPtr xcomb);
/**
* Set up for the cascade
*/
void prepareCascade(tSubProPtr sub) {
current_ = currentStep();
subProcess_ = sub;
}
/**
* Boost all the particles in the collision so that the collision always occurs
* in the rest frame with the incoming particles along the z axis
*/
void boostCollision(bool boost);
//@}
protected:
/**
* Set/unset the current shower handler
*/
//@{
/**
* Set the current handler
*/
void setCurrentHandler() {
currentHandler_ = tShowerHandlerPtr(this);
}
/**
* Unset the current handler
*/
void unSetCurrentHandler() {
currentHandler_ = tShowerHandlerPtr();
}
//@}
protected:
/**
* @name Members relating to the underlying event and MPI
*/
//@{
/**
* Return true if multiple parton interactions are switched on
* and can be used for this beam setup.
*/
bool isMPIOn() const {
return MPIHandler_ && MPIHandler_->beamOK();
}
/**
* Access function for the MPIHandler, it should only be called after
* checking with isMPIOn.
*/
tUEBasePtr getMPIHandler() const {
assert(MPIHandler_);
return MPIHandler_;
}
/**
* Is a beam particle where hadronic structure is resolved
*/
bool isResolvedHadron(tPPtr);
/**
* Get the remnants from the ThePEG::PartonBinInstance es and
* do some checks.
*/
RemPair getRemnants(PBIPair incbins);
/**
* Reset the PDF's after the hard collision has been showered
*/
void setMPIPDFs();
//@}
public:
/**
* Check if a particle decays in the shower
* @param id The PDG code for the particle
*/
bool decaysInShower(long id) const {
return ( particlesDecayInShower_.find( abs(id) ) !=
particlesDecayInShower_.end() );
}
protected:
/**
* Members to handle splitting up of hard process and decays
*/
//@{
/**
* Find decay products from the hard process and create decay processes
* @param parent The parent particle
* @param hard The hard process
* @param decay The decay processes
*/
void findDecayProducts(PPtr parent, PerturbativeProcessPtr hard, DecayProcessMap & decay) const;
/**
* Find decay products from the hard process and create decay processes
* @param parent The parent particle
* @param hard The parent hard process
* @param decay The decay processes
*/
void createDecayProcess(PPtr parent,PerturbativeProcessPtr hard, DecayProcessMap & decay) const;
//@}
/**
* @name Functions to return information relevant to the process being showered
*/
//@{
/**
* Return the currently used SubProcess.
*/
tSubProPtr currentSubProcess() const {
assert(subProcess_);
return subProcess_;
}
/**
* Access to the incoming beam particles
*/
tPPair incomingBeams() const {
return incoming_;
}
//@}
protected:
/**
* Weight handling for shower variations
*/
//@
/**
* Combine the variation weights which have been encountered
*/
void combineWeights();
/**
* Initialise the weights in currentEvent()
*/
void initializeWeights();
/**
* Reset the current weights
*/
void resetWeights();
//@}
protected:
/**
* Return the maximum number of attempts for showering
* a given subprocess.
*/
unsigned int maxtry() const { return maxtry_; }
protected:
+
+ /**
+ * Parameters for the space-time model
+ */
+ //@{
+ /**
+ * Whether or not to include spa-cetime distances in the shower
+ */
+ bool includeSpaceTime() const {return includeSpaceTime_;}
+
+ /**
+ * The minimum virtuality for the space-time model
+ */
+ Energy2 vMin() const {return vMin_;}
+ //@}
+
+protected:
/** @name Clone Methods. */
//@{
/**
* Make a simple clone of this object.
* @return a pointer to the new object.
*/
virtual IBPtr clone() const;
/** Make a clone of this object, possibly modifying the cloned object
* to make it sane.
* @return a pointer to the new object.
*/
virtual IBPtr fullclone() const;
//@}
protected:
/** @name Standard Interfaced functions. */
//@{
/**
* Initialize this object after the setup phase before saving an
* EventGenerator to disk.
* @throws InitException if object could not be initialized properly.
*/
virtual void doinit();
/**
* Initialize this object. Called in the run phase just before
* a run begins.
*/
virtual void doinitrun();
/**
* Finalize this object. Called in the run phase just after a
* run has ended. Used eg. to write out statistics.
*/
virtual void dofinish();
//@}
private:
/**
* The assignment operator is private and must never be called.
* In fact, it should not even be implemented.
*/
ShowerHandler & operator=(const ShowerHandler &);
private:
/**
* pointer to "this", the current ShowerHandler.
*/
static tShowerHandlerPtr currentHandler_;
/**
* a MPIHandler to administer the creation of several (semihard)
* partonic interactions.
*/
UEBasePtr MPIHandler_;
/**
* Pointer to the HwRemDecayer
*/
HwRemDecPtr remDec_;
private:
/**
* Maximum tries for various stages of the showering process
*/
//@{
/**
* Maximum number of attempts for the
* main showering loop
*/
unsigned int maxtry_;
/**
* Maximum number of attempts for the regeneration of an additional
* scattering, before the number of scatters is reduced.
*/
unsigned int maxtryMPI_;
/**
* Maximum number of attempts for the regeneration of an additional
* hard scattering, before this event is vetoed.
*/
unsigned int maxtryDP_;
/**
* Maximum number of attempts to generate a decay
*/
unsigned int maxtryDecay_;
//@}
private:
/**
* Factors for the various scales
*/
//@{
/**
* The factorization scale factor.
*/
double factorizationScaleFactor_;
/**
* The renormalization scale factor.
*/
double renormalizationScaleFactor_;
/**
* The scale factor for the hard scale
*/
double hardScaleFactor_;
/**
* True, if the phase space restrictions of the dipole shower should
* be applied.
*/
bool restrictPhasespace_;
/**
* True if maximum pt should be deduced from the factorization scale
*/
bool maxPtIsMuF_;
/**
* The profile scales
*/
Ptr<HardScaleProfile>::ptr hardScaleProfile_;
//@}
private:
/**
* Storage of information about the current event
*/
//@{
/**
* The incoming beam particles for the current collision
*/
tPPair incoming_;
/**
* Boost to get back to the lab
*/
LorentzRotation boost_;
/**
* Const pointer to the currently handeled ThePEG::SubProcess
*/
tSubProPtr subProcess_;
/**
* Const pointer to the current step
*/
tcStepPtr current_;
//@}
private:
/**
* PDFs to be used for the various stages and related parameters
*/
//@{
/**
* The PDF freezing scale
*/
Energy pdfFreezingScale_;
/**
* PDFs to be used for the various stages and related parameters
*/
//@{
/**
* The PDF for beam particle A. Overrides the particle's own PDF setting.
*/
PDFPtr PDFA_;
/**
* The PDF for beam particle B. Overrides the particle's own PDF setting.
*/
PDFPtr PDFB_;
/**
* The PDF for beam particle A for remnant splitting. Overrides the particle's own PDF setting.
*/
PDFPtr PDFARemnant_;
/**
* The PDF for beam particle B for remnant splitting. Overrides the particle's own PDF setting.
*/
PDFPtr PDFBRemnant_;
/**
* The MPI PDF's to be used for secondary scatters.
*/
pair <PDFPtr, PDFPtr> mpipdfs_;
/**
* The MPI PDF's to be used for secondary scatters.
*/
pair <PDFPtr, PDFPtr> rempdfs_;
/**
* The MPI PDF's to be used for secondary scatters.
*/
pair <PDFPtr, PDFPtr> remmpipdfs_;
//@}
private:
/**
* @name Parameters for initial- and final-state radiation
*/
//@{
/**
* Switch on or off final state radiation.
*/
bool doFSR_;
/**
* Switch on or off initial state radiation.
*/
bool doISR_;
//@}
private:
/**
* @name Parameters for particle decays
*/
//@{
/**
* Whether or not to split into hard and decay trees
*/
bool splitHardProcess_;
/**
* PDG codes of the particles which decay during showering
* this is fast storage for use during running
*/
set<long> particlesDecayInShower_;
/**
* PDG codes of the particles which decay during showering
* this is a vector that is interfaced so they can be changed
*/
vector<long> inputparticlesDecayInShower_;
//@}
private:
/**
* Parameters for the space-time model
*/
//@{
/**
* Whether or not to include spa-cetime distances in the shower
*/
bool includeSpaceTime_;
/**
* The minimum virtuality for the space-time model
*/
Energy2 vMin_;
//@}
private:
/**
* Parameters relevant for reweight and variations
*/
//@{
/**
* The shower variations
*/
map<string,ShowerVariation> showerVariations_;
/**
* Command to add a shower variation
*/
string doAddVariation(string);
/**
* A reweighting factor applied by the showering
*/
double reweight_;
/**
* The shower variation weights
*/
map<string,double> currentWeights_;
//@}
};
}
#endif /* HERWIG_ShowerHandler_H */

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