include/EvtGenBase/EvtDiracParticle.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
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0020
0021 #ifndef EVTDIRACPARTICLE_HH
0022 #define EVTDIRACPARTICLE_HH
0023
0024 #include "EvtGenBase/EvtDiracSpinor.hh"
0025 #include "EvtGenBase/EvtParticle.hh"
0026
0027 class EvtId;
0028 class EvtVector4R;
0029
0030 class EvtDiracParticle : public EvtParticle {
0031   public:
0032     EvtDiracParticle() = default;
0033     void init( EvtId part_n, const EvtVector4R& p4 ) override;
0034     void init( EvtId part_n, const EvtVector4R& p4, const EvtDiracSpinor&,
0035                const EvtDiracSpinor&, const EvtDiracSpinor&,
0036                const EvtDiracSpinor& );
0037     EvtDiracSpinor spParent( int i ) const override { return _spinorParent[i]; }
0038     EvtDiracSpinor sp( int i ) const override { return _spinorRest[i]; }
0039     EvtSpinDensity rotateToHelicityBasis() const override;
0040     EvtSpinDensity rotateToHelicityBasis( double alpha, double beta,
0041                                           double gamma ) const override;
0042
0043   private:
0044     EvtDiracSpinor _spinorRest[2];
0045     EvtDiracSpinor _spinorParent[2];
0046     EvtDiracParticle( const EvtDiracParticle& d );
0047     EvtDiracParticle& operator=( const EvtDiracParticle& d );
0048 };
0049 #endif