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// -*- C++ -*-
//
// PartonBinInstance.cc is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2011 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
//
// This is the implementation of the non-inlined, non-templated member
// functions of the PartonBinInstance class.
//
#include "PartonBinInstance.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
using namespace ThePEG;
PartonBinInstance::PartonBinInstance()
: theJacobian(1.0), theXi(-1.0), theEps(-1.0), theLi(-1.0), theX(-1.0),
theL(-1.0), theScale(ZERO), theRemnantWeight(0.0) {}
PartonBinInstance::PartonBinInstance(const PartonBinInstance & x)
: Base(x),
theBin(x.theBin), theBins(x.theBins), theIncoming(x.theIncoming),
theJacobian(x.theJacobian), theParticle(x.theParticle),
theParton(x.theParton), thePartons(x.thePartons), theXi(x.theXi),
theEps(x.theEps), theLi(x.theLi), theX(x.theX), theL(x.theL),
theScale(x.theScale), theKT(x.theKT), theRemnantWeight(x.theRemnantWeight),
theRemnants(x.theRemnants), theRemInfo(x.theRemInfo) {}
PartonBinInstance::PartonBinInstance(tcPBPtr pb, tPBIPtr pbi)
: theBin(pb), theJacobian(1.0), theXi(-1.0), theEps(-1.0), theLi(-1.0),
theX(-1.0), theL(-1.0), theScale(ZERO), theRemnantWeight(0.0) {
if ( pbi ) theIncoming = pbi;
else if ( bin()->incoming() )
theIncoming = new_ptr(PartonBinInstance(bin()->incoming()));
}
PartonBinInstance::PartonBinInstance(tPPtr part, tcPBPtr pb, Energy2 scale)
: theBin(pb), theJacobian(1.0), theParton(part), theXi(1.0), theEps(0.0),
theLi(0.0), theX(1.0), theL(0.0), theScale(scale),
theRemnantWeight(1.0) {
if ( !pb->incoming() || part->parents().empty() ) return;
particle(parton()->parents()[0]);
Energy2 P2 = max(-particle()->momentum().m2(), ZERO);
theXi = parton()->momentum().dirPlus()/particle()->momentum().dirPlus();
theLi = -log(xi());
theIncoming = new_ptr(PartonBinInstance(particle(), pb->incoming(), P2));
theX = xi()*incoming()->x();
theL = li() + incoming()->li();
theEps = Math::exp1m(-li());
}
PartonBinInstance::PartonBinInstance(tPPtr Part, tPPtr part, tcPBPtr pb, Energy2 scale)
: theBin(pb), theJacobian(1.0), theParton(part), theXi(1.0), theEps(0.0),
theLi(0.0), theX(1.0), theL(0.0), theScale(scale),
theRemnantWeight(1.0) {
if ( !pb->incoming() ) return;
particle(Part);
Energy2 P2 = max(-particle()->momentum().m2(), ZERO);
theXi = parton()->momentum().dirPlus()/particle()->momentum().dirPlus();
theLi = -log(xi());
theIncoming = new_ptr(PartonBinInstance(particle(), pb->incoming(), P2));
theX = xi()*incoming()->x();
theL = li() + incoming()->li();
theEps = Math::exp1m(-li());
}
PartonBinInstance::~PartonBinInstance() {}
tPBIPtr PartonBinInstance::getFirst() {
return incoming()? incoming()->getFirst(): tPBIPtr(this);
}
// TAKE AWAY ?
void PartonBinInstance::reset(double lx, Energy2 Q2) {
l(lx);
li(lx);
scale(Q2);
particle(tPPtr());
parton(tPPtr());
theRemnants.clear();
thePartons.clear();
remnantWeight(1.0);
}
void PartonBinInstance::prepare() {
li(-1.0);
l(0.0);
if ( !incoming() ) return;
// li(-1.0);
// l(-1.0);
reset(-1.0, ZERO);
incoming()->prepare();
}
bool PartonBinInstance::hasPoleIn1() const {
return ( !incoming() || incoming()->hasPoleIn1()) &&
(!pdf() || pdf()->hasPoleIn1(particleData(), partonData()) );
}
// TAKE AWAY ?
void PartonBinInstance::generate(const double * r) {
scale(ZERO);
if ( !incoming() ) return;
if ( li() >= 0 ) return;
li(0.0);
jacobian(1.0);
remnantWeight(1.0);
if ( bin()->pdfDim() )
li(pdf()->flattenL(particleData(), partonData(), bin()->cuts(),
*r++, theJacobian));
if ( bin()->pdfDim() > 1 )
scale(pdf()->flattenScale(particleData(), partonData(), bin()->cuts(),
li(), *r++, theJacobian)
*bin()->cuts().scaleMaxL(li()));
incoming()->generate(r);
l(li() + incoming()->l());
}
void PartonBinInstance::persistentOutput(PersistentOStream & os) const {
os << theBin << theBins << theIncoming << theJacobian << theParticle
<< theParton << thePartons << theXi << theEps << theLi << theX << theL
<< ounit(theScale, GeV2) << ounit(theKT, GeV) << theRemnantWeight
<< theRemnants;
}
void PartonBinInstance::persistentInput(PersistentIStream & is, int) {
is >> theBin >> theBins >> theIncoming >> theJacobian >> theParticle
>> theParton >> thePartons >> theXi >> theEps >> theLi >> theX >> theL
>> iunit(theScale, GeV2) >> iunit(theKT, GeV) >> theRemnantWeight
>> theRemnants;
theRemInfo = RemIPtr();
}
ClassDescription<PartonBinInstance> PartonBinInstance::initPartonBinInstance;
// Definition of the static class description member.
void PartonBinInstance::Init() {
}
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