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Pi4ElectronAnalysis.cc
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Pi4ElectronAnalysis.cc
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// -*- C++ -*-
//
// This is the implementation of the non-inlined, non-templated member
// functions of the Pi4ElectronAnalysis class.
//
#include "Pi4ElectronAnalysis.h"
#include "ThePEG/Interface/ClassDocumentation.h"
#include "ThePEG/EventRecord/Event.h"
#include <ThePEG/EventRecord/Event.h>
#include <ThePEG/PDT/EnumParticles.h>
#include "ThePEG/Repository/CurrentGenerator.h"
using namespace Herwig;
void Pi4ElectronAnalysis::analyze(tEventPtr event, long , int loop, int state) {
if ( loop > 0 || state != 0 || !event ) return;
transform(event);
// find all the decaying neutral pions
tPVector particles;
for(unsigned int ix=0, nstep=event->primaryCollision()->steps().size();
ix<nstep;++ix) {
ThePEG::ParticleSet part=event->primaryCollision()->step(ix)->all();
ThePEG::ParticleSet::iterator iter=part.begin();
ThePEG::ParticleSet::iterator end=part.end();
for( ;iter!=end;++iter) {
if((**iter).id()==ParticleID::pi0) {
particles.push_back(*iter);
}
}
}
// analyse them
analyze(particles);
}
void Pi4ElectronAnalysis::analyze(const tPVector & particles) {
AnalysisHandler::analyze(particles);
// Calls analyze() for each particle.
}
void Pi4ElectronAnalysis::analyze(tPPtr part) {
// check the number of children of the particle
if(part->children().size()!=4) return;
Lorentz5Momentum pe[2],pp[2];
unsigned int ne(0),np(0);
int id;
// find the particles
unsigned int ix,iy;
for(ix=0;ix<part->children().size();++ix) {
id=part->children()[ix]->id();
if(id==ParticleID::eplus){pe[ne]=part->children()[ix]->momentum();++ne;}
else if(id==ParticleID::eminus){pp[np]=part->children()[ix]->momentum();++np;}
}
if(ne!=2||np!=2){return;}
// find the invariant masses
Lorentz5Momentum ptemp;
for(ix=0;ix<2;++ix) {
for(iy=0;iy<2;++iy) {
ptemp=pe[ix]+pp[iy];
ptemp.rescaleMass();
for(unsigned int iz=0;iz<_mffbar.size();++iz) {
*_mffbar[iz]+=ptemp.mass()/MeV;
}
}
}
}
NoPIOClassDescription<Pi4ElectronAnalysis> Pi4ElectronAnalysis::initPi4ElectronAnalysis;
// Definition of the static class description member.
void Pi4ElectronAnalysis::Init() {
static ClassDocumentation<Pi4ElectronAnalysis> documentation
("There is no documentation for the Pi4ElectronAnalysis class");
}
void Pi4ElectronAnalysis::dofinish() {
AnalysisHandler::dofinish();
string fname = CurrentGenerator::current().filename() + string("-") + name() + string(".top");
ofstream output(fname.c_str());
for(unsigned int ix=0;ix<_mffbar.size();++ix) {
_mffbar[ix]->topdrawOutput(output,true,true,false,true,
"RED",
"Mass of the e2+3e2-3 pair in P203Re2+3e2-3e2+3e2-3",
" X X X X GX XW X X X X X X X X",
"1/SdS/dm0e2+3e2-31/GeV2-13",
" G G X X X X XX X X",
"m0e2+3e2-31",
" X X X X XX");
}
}
void Pi4ElectronAnalysis::doinitrun() {
AnalysisHandler::doinitrun();
_mffbar.push_back(new_ptr(Histogram(0.0,140.0,1000)));
_mffbar.push_back(new_ptr(Histogram(0.0, 20.0,100 )));
}

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Pi4ElectronAnalysis.cc (3 KB)

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