EvtVSS.cpp

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#include "EvtGenModels/EvtVSS.hh"
 
#include "EvtGenBase/EvtGenKine.hh"
#include "EvtGenBase/EvtPDL.hh"
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtReport.hh"
#include "EvtGenBase/EvtVector4C.hh"
#include "EvtGenBase/EvtVector4R.hh"
 
#include <stdlib.h>
#include <string>
 
std::string EvtVSS::getName() const
{
    return "VSS";
}
 
EvtDecayBase* EvtVSS::clone() const
{
    return new EvtVSS;
}
 
void EvtVSS::init()
{
    // check that there are 0 arguments
    checkNArg( 0 );
 
    // check that there are 2 daughters
    checkNDaug( 2 );
 
    // check the parent and daughter spins
    checkSpinParent( EvtSpinType::VECTOR );
    checkSpinDaughter( 0, EvtSpinType::SCALAR );
    checkSpinDaughter( 1, EvtSpinType::SCALAR );
}
 
void EvtVSS::initProbMax()
{
    setProbMax( 1.0 );
}
 
void EvtVSS::decay( EvtParticle* p )
{
    p->initializePhaseSpace( getNDaug(), getDaugs() );
 
    EvtVector4R pDaug = p->getDaug( 0 )->getP4();
 
    double norm = 1.0 / pDaug.d3mag();
 
    for ( int i = 0; i < 3; i++ )
        vertex( i, norm * pDaug * ( p->eps( i ) ) );
 
    return;
}