include/EvtGenModels/EvtHelAmp.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
0004 *                                                                      *
0005 * This file is part of EvtGen.                                         *
0006 *                                                                      *
0007 * EvtGen is free software: you can redistribute it and/or modify       *
0008 * it under the terms of the GNU General Public License as published by *
0009 * the Free Software Foundation, either version 3 of the License, or    *
0010 * (at your option) any later version.                                  *
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0014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
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0016 *                                                                      *
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0019 ***********************************************************************/
0020
0021 #ifndef EVTHELAMP_HH
0022 #define EVTHELAMP_HH
0023
0024 #include "EvtGenBase/EvtDecayAmp.hh"
0025 #include "EvtGenBase/EvtId.hh"
0026
0027 #include <memory>
0028
0029 class EvtParticle;
0030 class EvtEvalHelAmp;
0031
0032 // Description:Decay model for implementation of generic 2 body
0033 //             decay specified by the helicity amplitudes
0034
0035 class EvtHelAmp : public EvtDecayAmp {
0036   public:
0037     std::string getName() override;
0038     EvtDecayBase* clone() override;
0039
0040     void init() override;
0041     void initProbMax() override;
0042
0043     void decay( EvtParticle* p ) override;
0044
0045   private:
0046     void fillHelicity( int* lambda2, int n, int J2, EvtId id );
0047
0048     std::unique_ptr<EvtEvalHelAmp> _evalHelAmp;
0049 };
0050
0051 #endif