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EvtVPHOtoV.cpp
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EvtVPHOtoV.cpp
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//--------------------------------------------------------------------------
//
// Environment:
// This software is part of the EvtGen package developed jointly
// for the BaBar and CLEO collaborations. If you use all or part
// of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
// Copyright (C) 2004 Cornell
//
// Module: EvtVPHOtoV.cc
//
// Description: Routine to decay vpho -> vector
//
// Modification history:
//
// Ryd March 9, 2004 Module created
//
//------------------------------------------------------------------------
//
#include <stdlib.h>
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtGenKine.hh"
#include "EvtGenBase/EvtPDL.hh"
#include "EvtGenBase/EvtVector4C.hh"
#include "EvtGenBase/EvtVector4R.hh"
#include "EvtGenBase/EvtReport.hh"
#include "EvtGenModels/EvtVPHOtoV.hh"
#include <string>
EvtVPHOtoV::~EvtVPHOtoV() {}
std::string EvtVPHOtoV::getName(){
return "VPHOTOV";
}
EvtDecayBase* EvtVPHOtoV::clone(){
return new EvtVPHOtoV;
}
void EvtVPHOtoV::init(){
// check that there are 0 arguments
checkNArg(0);
// check that there are 1 daughters
checkNDaug(1);
// check the parent and daughter spins
checkSpinParent(EvtSpinType::VECTOR);
checkSpinDaughter(0,EvtSpinType::VECTOR);
}
void EvtVPHOtoV::initProbMax() {
setProbMax(1.0);
}
void EvtVPHOtoV::decay( EvtParticle *p){
p->initializePhaseSpace(getNDaug(),getDaugs());
EvtParticle* d=p->getDaug(0);
d->setP4(p->getP4Restframe());
vertex(0,0,p->eps(0)*p->epsParent(0).conj());
vertex(1,0,p->eps(1)*p->epsParent(0).conj());
vertex(2,0,p->eps(2)*p->epsParent(0).conj());
vertex(0,1,p->eps(0)*p->epsParent(1).conj());
vertex(1,1,p->eps(1)*p->epsParent(1).conj());
vertex(2,1,p->eps(2)*p->epsParent(1).conj());
vertex(0,2,p->eps(0)*p->epsParent(2).conj());
vertex(1,2,p->eps(1)*p->epsParent(2).conj());
vertex(2,2,p->eps(2)*p->epsParent(2).conj());
return;
}

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