EvtTVP.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 EvtTVP_HH
#define EvtTVP_HH
 
#include "EvtGenBase/EvtDecayAmp.hh"
 
#include <string>
 
class EvtDecayBase;
class EvtParticle;
 
// Description: Routine to implement radiative decay
//                   chi_c2 -> psi gamma
//                   chi_c2 -> psi ell ell
//              matrix element from [S.P Baranov et al, PRD 85, 014034 (2012)]
 
class EvtTVP : public EvtDecayAmp {
  public:
    std::string getName() const override;
    EvtDecayBase* clone() const override;
 
    void decay( EvtParticle* p ) override;
    void init() override;
 
    void initProbMax() override;
 
  private:
    void decay_2body( EvtParticle* p );
    void decay_3body( EvtParticle* p );
    double m_delta;    // form factor parameter
};
 
#endif