EvtISGW.cpp

Go to the documentation of this file.

 
/***********************************************************************
* Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
*                                                                      *
* This file is part of EvtGen.                                         *
*                                                                      *
* EvtGen is free software: you can redistribute it and/or modify       *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or    *
* (at your option) any later version.                                  *
*                                                                      *
* EvtGen is distributed in the hope that it will be useful,            *
* but WITHOUT ANY WARRANTY; without even the implied warranty of       *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
* GNU General Public License for more details.                         *
*                                                                      *
* You should have received a copy of the GNU General Public License    *
* along with EvtGen.  If not, see <https://www.gnu.org/licenses/>.     *
***********************************************************************/
 
#include "EvtGenModels/EvtISGW.hh"
 
#include "EvtGenBase/EvtGenKine.hh"
#include "EvtGenBase/EvtPDL.hh"
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtReport.hh"
#include "EvtGenBase/EvtSemiLeptonicScalarAmp.hh"
#include "EvtGenBase/EvtSemiLeptonicTensorAmp.hh"
#include "EvtGenBase/EvtSemiLeptonicVectorAmp.hh"
 
#include "EvtGenModels/EvtISGWFF.hh"
 
#include <stdlib.h>
#include <string>
 
std::string EvtISGW::getName() const
{
    return "ISGW";
}
 
EvtDecayBase* EvtISGW::clone() const
{
    return new EvtISGW;
}
 
void EvtISGW::decay( EvtParticle* p )
{
    p->initializePhaseSpace( getNDaug(), getDaugs() );
 
    m_calcamp->CalcAmp( p, m_amp2, m_isgwffmodel.get() );
}
 
void EvtISGW::init()
{
    checkNArg( 0 );
    checkNDaug( 3 );
 
    //We expect the parent to be a scalar
    //and the daughters to be X lepton neutrino
 
    EvtSpinType::spintype mesontype = EvtPDL::getSpinType( getDaug( 0 ) );
 
    checkSpinParent( EvtSpinType::SCALAR );
    checkSpinDaughter( 1, EvtSpinType::DIRAC );
    checkSpinDaughter( 2, EvtSpinType::NEUTRINO );
 
    m_isgwffmodel = std::make_unique<EvtISGWFF>();
 
    switch ( mesontype ) {
        case EvtSpinType::SCALAR:
            m_calcamp = std::make_unique<EvtSemiLeptonicScalarAmp>();
            break;
        case EvtSpinType::VECTOR:
            m_calcamp = std::make_unique<EvtSemiLeptonicVectorAmp>();
            break;
        case EvtSpinType::TENSOR:
            m_calcamp = std::make_unique<EvtSemiLeptonicTensorAmp>();
            break;
        default:;
    }
}
 
void EvtISGW::initProbMax()
{
    setProbMax( 10000.0 );
}