include/EvtGenExternal/EvtPhotosEngine.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
0004 *                                                                      *
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0020
0021 #ifdef EVTGEN_PHOTOS
0022 #ifndef EVTPHOTOSENGINE_HH
0023 #define EVTPHOTOSENGINE_HH
0024
0025 #include "EvtGenBase/EvtHepMCEvent.hh"
0026 #include "EvtGenBase/EvtId.hh"
0027 #include "EvtGenBase/EvtParticle.hh"
0028 #include "EvtGenBase/EvtVector4R.hh"
0029
0030 #include "EvtGenModels/EvtAbsExternalGen.hh"
0031 #ifdef EVTGEN_HEPMC3
0032 #include "HepMC3/Units.h"
0033
0034 #include "Photos/PhotosHepMC3Event.h"
0035 #include "Photos/PhotosHepMC3Particle.h"
0036 #else
0037 #include "Photos/PhotosHepMCEvent.h"
0038 #include "Photos/PhotosHepMCParticle.h"
0039 #include "Photos/PhotosParticle.h"
0040 #endif
0041
0042 #include <string>
0043
0044 // Description: Interface to the PHOTOS external generator
0045
0046 class EvtPhotosEngine : public EvtAbsExternalGen {
0047   public:
0048     EvtPhotosEngine( std::string photonType = "gamma",
0049                      bool useEvtGenRandom = true );
0050
0051     bool doDecay( EvtParticle* theMother ) override;
0052
0053     void initialise() override;
0054
0055   private:
0056     std::string _photonType;
0057     EvtId _gammaId;
0058     int _gammaPDG;
0059     double _mPhoton;
0060     bool _initialised;
0061
0062     GenParticlePtr createGenParticle( EvtParticle* theParticle, bool incoming );
0063     int getNumberOfPhotons( const GenVertexPtr theVertex ) const;
0064 };
0065
0066 #endif
0067
0068 #endif