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// -*- C++ -*-
//
// XComb.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 XComb class.
//
#include "XComb.h"
#include "ThePEG/Handlers/EventHandler.h"
#include "ThePEG/Handlers/SubProcessHandler.h"
#include "ThePEG/Cuts/Cuts.h"
#include "ThePEG/PDF/PartonExtractor.h"
#include "ThePEG/Utilities/Debug.h"
#include "ThePEG/Utilities/Maths.h"
#include "ThePEG/PDT/ParticleData.h"
#include "ThePEG/Persistency/PersistentOStream.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "ThePEG/Utilities/SimplePhaseSpace.h"
#include "ThePEG/Utilities/UtilityBase.h"
#include "ThePEG/EventRecord/Particle.h"
#include "ThePEG/EventRecord/SubProcess.h"
#include "ThePEG/Vectors/LorentzRotation.h"
#include "ThePEG/MatrixElement/MEBase.h"
#include "ThePEG/MatrixElement/ColourLines.h"
#include "ThePEG/Handlers/LuminosityFunction.h"
#include "ThePEG/Handlers/CascadeHandler.h"
#include "ThePEG/Repository/EventGenerator.h"
using namespace ThePEG;
XComb::XComb()
: theLastS(Energy2()), theLastSHat(Energy2()), theLastY(0.0),
theLastP1P2(make_pair(1.0, 1.0)), theLastL1L2(make_pair(1.0, 1.0)),
theLastX1X2(make_pair(1.0, 1.0)), theLastE1E2(make_pair(0.0, 0.0)),
theLastScale(ZERO), theLastAlphaS(-1.0), theLastAlphaEM(-1.0),
theMaxEnergy(ZERO) {}
XComb::
XComb(Energy newMaxEnergy, const cPDPair & inc, tEHPtr newEventHandler,
tPExtrPtr newExtractor, tCascHdlPtr newCKKW, const PBPair & newPartonBins,
tCutsPtr newCuts)
: theEventHandler(newEventHandler),
thePartonExtractor(newExtractor), theCKKW(newCKKW), theCuts(newCuts),
theParticles(inc), thePartonBins(newPartonBins), theLastS(Energy2()),
theLastSHat(Energy2()), theLastY(0.0), theLastP1P2(make_pair(1.0, 1.0)),
theLastL1L2(make_pair(1.0, 1.0)), theLastX1X2(make_pair(1.0, 1.0)),
theLastE1E2(make_pair(0.0, 0.0)), theLastScale(ZERO),
theLastAlphaS(-1.0), theLastAlphaEM(-1.0), theMaxEnergy(newMaxEnergy) {
thePartons = cPDPair(partonBins().first->parton(),
partonBins().second->parton());
thePartonBinInstances.first =
new_ptr(PartonBinInstance(partonBins().first));
thePartonBinInstances.second =
new_ptr(PartonBinInstance(partonBins().second));
theParticleBins.first = thePartonBins.first->getFirst();
theParticleBins.second = thePartonBins.second->getFirst();
}
XComb::~XComb() {}
void XComb::clean() {
theLastParticles = PPair();
theLastPartons = PPair();
theLastS = theLastSHat = theLastScale = ZERO;
theLastAlphaS = theLastAlphaEM = -1.0;
theLastY = 0.0;
theLastP1P2 = theLastL1L2 = theLastX1X2 = theLastE1E2 = DPair(0.0, 0.0);
theSub = SubProPtr();
thePartonBinInstances = PBIPair();
}
void XComb::prepare(const PPair & inc) {
clean();
createPartonBinInstances();
theLastParticles = inc;
pExtractor()->prepare(partonBinInstances());
}
void XComb::subProcess(tSubProPtr sp) {
theSub = sp;
}
void XComb::setPartonBinInfo() {
partonBinInstances().first->getFirst()->parton(lastParticles().first);
partonBinInstances().second->getFirst()->parton(lastParticles().second);
}
void XComb::createPartonBinInstances() {
thePartonBinInstances.first =
new_ptr(PartonBinInstance(partonBins().first));
thePartonBinInstances.second =
new_ptr(PartonBinInstance(partonBins().second));
}
void XComb::setPartonBinInstances(PBIPair pbip, Energy2 scale) {
clean();
thePartonBinInstances = pbip;
theLastParticles = PPair(pbip.first->getFirst()->parton(),
pbip.second->getFirst()->parton());
theLastPartons = PPair(pbip.first->parton(),
pbip.second->parton());
lastS((lastParticles().first->momentum() +
lastParticles().second->momentum()).m2());
lastSHat((lastPartons().first->momentum() +
lastPartons().second->momentum()).m2());
lastP1P2(make_pair(0.0, 0.0));
lastX1X2(make_pair(lastPartons().first->momentum().plus()/
lastParticles().first->momentum().plus(),
lastPartons().second->momentum().minus()/
lastParticles().second->momentum().minus()));
lastY(log(lastX1()/lastX2())*0.5);
lastScale(scale);
}
void XComb::lastL1L2(pair<double,double> ll) {
theLastL1L2 = ll;
theLastX1X2 = make_pair(exp(-ll.first), exp(-ll.second));
theLastE1E2 = make_pair(Math::exp1m(-ll.first), Math::exp1m(-ll.second));
}
void XComb::lastX1X2(pair<double,double> xx) {
theLastX1X2 = xx;
theLastL1L2 = make_pair(-log(xx.first), -log(xx.second));
theLastE1E2 = make_pair(1.0 - xx.first, 1.0 - xx.second);
}
void XComb::lastE1E2(pair<double,double> ee) {
theLastE1E2= ee;
theLastL1L2 = make_pair(-Math::log1m(ee.first), -Math::log1m(ee.second));
theLastX1X2 = make_pair(1.0 - ee.first, 1.0 - ee.second);
}
tPBIPtr XComb::partonBinInstance(tcPPtr p) const {
return pExtractor()->partonBinInstance(p);
}
void XComb::Init() {}
void XComb::persistentOutput(PersistentOStream & os) const {
os << theEventHandler << thePartonExtractor << theCKKW
<< theCuts << theParticles << thePartons << thePartonBins
<< theParticleBins << thePartonBinInstances
<< theLastParticles << theLastPartons
<< ounit(theLastS, GeV2) << ounit(theLastSHat, GeV2) << theLastY
<< theLastP1P2 << theLastL1L2 << theLastX1X2 << theLastE1E2
<< ounit(theLastScale, GeV2) << theLastAlphaS << theLastAlphaEM
<< ounit(theMaxEnergy, GeV) << theMEInfo << theSub;
}
void XComb::persistentInput(PersistentIStream & is, int) {
is >> theEventHandler >> thePartonExtractor >> theCKKW
>> theCuts >> theParticles >> thePartons >> thePartonBins
>> theParticleBins >> thePartonBinInstances
>> theLastParticles >> theLastPartons
>> iunit(theLastS, GeV2) >> iunit(theLastSHat, GeV2) >> theLastY
>> theLastP1P2 >> theLastL1L2 >> theLastX1X2 >> theLastE1E2
>> iunit(theLastScale, GeV2) >> theLastAlphaS >> theLastAlphaEM
>> iunit(theMaxEnergy, GeV) >> theMEInfo >> theSub;
}
ClassDescription<XComb> XComb::initXComb;
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