EvtTauolaEngine.hh

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#ifdef EVTGEN_TAUOLA
 
#ifndef EVTTAUOLAENGINE_HH
#define EVTTAUOLAENGINE_HH
 
#include "EvtGenBase/EvtDecayBase.hh"
#include "EvtGenBase/EvtId.hh"
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtVector4R.hh"
 
#include "EvtGenModels/EvtAbsExternalGen.hh"
 
#ifdef EVTGEN_HEPMC3
#include "HepMC3/Relatives.h"
#include "HepMC3/Units.h"
 
#include "Tauola/TauolaHepMC3Event.h"
#include "Tauola/TauolaHepMC3Particle.h"
#else
#include "Tauola/TauolaHepMCEvent.h"
#include "Tauola/TauolaHepMCParticle.h"
#include "Tauola/TauolaParticle.h"
#endif
#include "EvtGenBase/EvtHepMCEvent.hh"
 
#include <mutex>
 
// Description: Interface to the TAUOLA external generator
 
class EvtTauolaEngine : public EvtAbsExternalGen {
  public:
    EvtTauolaEngine( bool useEvtGenRandom = true, bool seedTauolaFortran = true );
 
    bool doDecay( EvtParticle* theMother ) override;
 
    void initialise() override;
 
  protected:
  private:
    GenParticlePtr createGenParticle( const EvtParticle* theParticle ) const;
 
    void setUpPossibleTauModes();
    void setOtherParameters();
 
    int getModeInt( EvtDecayBase* decayModel ) const;
 
    void decayTauEvent( EvtParticle* tauParticle );
 
    bool m_useEvtGenRandom{ true };
    bool m_seedTauolaFortran{ true };
 
    // PDG standard code integer ID for tau particle
    static constexpr int m_tauPDG{ 15 };
    // Number of possible decay modes in Tauola
    static constexpr int m_nTauolaModes{ 22 };
    // Neutral and charged spin propagator choices
    static int m_neutPropType;
    static int m_posPropType;
    static int m_negPropType;
 
    static bool m_initialised;
    static std::mutex m_tauola_mutex;
};
 
#endif
 
#endif