EvtPto3PAmp.hh

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/>.     *
***********************************************************************/
 
#ifndef EVT_PTO3P_AMP_HH
#define EVT_PTO3P_AMP_HH
 
#include "EvtGenBase/EvtComplex.hh"
#include "EvtGenBase/EvtCyclic3.hh"
#include "EvtGenBase/EvtSpinType.hh"
 
#include <vector>
using std::vector;
#include "EvtGenBase/EvtAmplitude.hh"
#include "EvtGenBase/EvtDalitzPoint.hh"
#include "EvtGenBase/EvtPropagator.hh"
#include "EvtGenBase/EvtTwoBodyVertex.hh"
 
class EvtBlattWeisskopf;
 
class EvtPto3PAmp : public EvtAmplitude<EvtDalitzPoint> {
  public:
    // Numerator type
    enum NumType
    {
        NBW = 0,
        RBW_ZEMACH = 1,
        RBW_KUEHN = 2,
        RBW_CLEO = 3,
        FLATTE,
        GAUSS,
        DOUBLE_GAUSS,
        NONRES,
        NONRES_LIN,
        NONRES_EXP,
        NONRES_EXP_ADD,
        NONRES_CCS,
        NONRES_LAURA,
        LASS,
        LASS_ELASTIC,
        LASS_RESONANT,
        GS
    };
 
    EvtPto3PAmp( EvtDalitzPlot dp, EvtCyclic3::Pair pairAng,
                 EvtCyclic3::Pair pairRes, EvtSpinType::spintype spin,
                 const EvtPropagator& prop, NumType typeN );
 
    EvtPto3PAmp( const EvtPto3PAmp& other );
 
    ~EvtPto3PAmp();
 
    EvtAmplitude<EvtDalitzPoint>* clone() const override
    {
        return new EvtPto3PAmp( *this );
    }
 
    EvtComplex amplitude( const EvtDalitzPoint& p ) const override;
    EvtComplex numerator( const EvtDalitzPoint& p ) const;
    double angDep( const EvtDalitzPoint& p ) const;
 
    void set_fd( double R );
    void set_fb( double R );
 
    void setmin( double min ) { m_min = min; }
    void setmax( double max ) { m_max = max; }
 
    virtual EvtComplex evalPropagator( double m ) const
    {
        return m_prop->evaluate( m );
    }
 
  private:
    // Pairing indices:
 
    EvtCyclic3::Pair m_pairAng;    // angular
    EvtCyclic3::Pair m_pairRes;    // resonance
 
    // Spin
 
    EvtSpinType::spintype m_spin;
 
    // Numerator type
 
    NumType m_typeN;
 
    // _Owned_ pointer to propagator factor
 
    EvtPropagator* m_prop;
    double m_g0;     // nominal width
    double m_min;    //min and max values on which
    double m_max;    //the resonance is defined
 
    // Vertices
 
    EvtTwoBodyVertex m_vb;
    EvtTwoBodyVertex m_vd;
};
 
#endif