EvtFlatLineShape.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 "EvtGenBase/EvtFlatLineShape.hh"
 
#include "EvtGenBase/EvtBlattWeisskopf.hh"
#include "EvtGenBase/EvtPDL.hh"
#include "EvtGenBase/EvtPropBreitWigner.hh"
#include "EvtGenBase/EvtPropBreitWignerRel.hh"
#include "EvtGenBase/EvtRandom.hh"
#include "EvtGenBase/EvtSpinType.hh"
#include "EvtGenBase/EvtTwoBodyVertex.hh"
 
EvtFlatLineShape::EvtFlatLineShape( double mass, double width, double maxRange,
                                    EvtSpinType::spintype sp )
{
    m_mass = mass;
    m_width = width;
    m_spin = sp;
    m_maxRange = maxRange;
 
    double maxdelta = width;
 
    m_massMax = mass + maxdelta;
    m_massMin = mass - maxdelta;
 
    if ( m_massMin < 0. )
        m_massMin = 0.;
}
 
EvtFlatLineShape::EvtFlatLineShape( const EvtFlatLineShape& x ) :
    EvtAbsLineShape( x )
{
    m_mass = x.m_mass;
    m_width = x.m_width;
    m_spin = x.m_spin;
    m_massMax = x.m_massMax;
    m_massMin = x.m_massMin;
    m_maxRange = x.m_maxRange;
}
 
EvtFlatLineShape& EvtFlatLineShape::operator=( const EvtFlatLineShape& x )
{
    m_mass = x.m_mass;
    m_massMax = x.m_massMax;
    m_massMin = x.m_massMin;
    m_width = x.m_width;
    m_maxRange = x.m_maxRange;
    m_spin = x.m_spin;
    return *this;
}
 
EvtAbsLineShape* EvtFlatLineShape::clone()
{
    return new EvtFlatLineShape( *this );
}
 
double EvtFlatLineShape::getMassProb( double mass, double massPar, int nDaug,
                                      double* massDau )
{
    double dTotMass = 0.;
 
    int i;
    for ( i = 0; i < nDaug; i++ ) {
        dTotMass += massDau[i];
    }
    if ( ( mass < dTotMass ) )
        return 0.;
 
    if ( massPar > 0.0000000001 ) {
        if ( mass > massPar )
            return 0.;
    }
 
    return 1.;
}
 
double EvtFlatLineShape::getRandMass( EvtId*, int, EvtId*, EvtId*, double,
                                      double* )
{
    return EvtRandom::Flat( m_massMin, m_massMax );
}