EvtVectorParticle.hh

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#ifndef EVTVECTORPARTICLE_HH
#define EVTVECTORPARTICLE_HH

#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtVector4C.hh"
#include "EvtGenBase/EvtVector4R.hh"

class EvtId;

class EvtVectorParticle : public EvtParticle {
  public:
    EvtVectorParticle() = default;

    void init( EvtId part_n, double e, double px, double py, double pz );
    void init( EvtId part_n, const EvtVector4R& p ) override;
    void init( EvtId part_n, const EvtVector4R& p, const EvtVector4C&,
               const EvtVector4C&, const EvtVector4C& );
    EvtVector4C epsParent( int i ) const override
    {
        return boostTo( _eps[i], this->getP4() );
    }
    EvtVector4C eps( int i ) const override { return _eps[i]; }
    EvtSpinDensity rotateToHelicityBasis() const override;
    EvtSpinDensity rotateToHelicityBasis( double alpha, double beta,
                                          double gamma ) const override;

  private:
    EvtVector4C _eps[3];

    EvtVectorParticle( const EvtVectorParticle& vector );
    EvtVectorParticle& operator=( const EvtVectorParticle& vector );
};

#endif