include/EvtGenModels/EvtSVPHelAmp.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
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0020
0021 #ifndef EVTSVPHELAMP_HH
0022 #define EVTSVPHELAMP_HH
0023
0024 #include "EvtGenBase/EvtDecayAmp.hh"
0025
0026 // Description: Routine to decay scalar -> vector + photon
0027 //              by specifying the helicity amplitudes
0028 //
0029 //Class to handle decays of the form SCALAR -> VECTOR PHOTON
0030 //where the helicity amplitudes must be specified. The
0031 //first and third arguments are the magnitudes of the H+
0032 //and H- helicity amplitudes respectively. The second and
0033 //fourth arguements are the phases.
0034 //Calls EvtSVPHel.
0035
0036 class EvtParticle;
0037 class EvtAmp;
0038 class EvtId;
0039
0040 class EvtSVPHelAmp : public EvtDecayAmp {
0041   public:
0042     std::string getName() override;
0043     EvtDecayBase* clone() override;
0044
0045     void init() override;
0046     void initProbMax() override;
0047
0048     void decay( EvtParticle* p ) override;
0049
0050     static void SVPHel( EvtParticle* parent, EvtAmp& amp, EvtId n_v1,
0051                         EvtId n_ph, const EvtComplex& hp, const EvtComplex& hm );
0052 };
0053
0054 #endif