EvtTensorParticle.hh

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#ifndef EVTTENSORPARTICLE_HH
#define EVTTENSORPARTICLE_HH
 
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtTensor4C.hh"
 
#include <array>
 
class EvtTensorParticle : public EvtParticle {
  public:
    EvtTensorParticle() = default;
 
    void init( EvtId part_n, double e, double px, double py, double pz );
    void init( EvtId part_n, const EvtVector4R& p4 ) override;
    void init( EvtId part_n, const EvtVector4R& p4, const EvtTensor4C&,
               const EvtTensor4C&, const EvtTensor4C&, const EvtTensor4C&,
               const EvtTensor4C& );
    //Returns polarization tensors.
    EvtTensor4C epsTensorParent( int i ) const override;
    EvtTensor4C epsTensor( int i ) const override;
 
    EvtSpinDensity rotateToHelicityBasis() const override;
    EvtSpinDensity rotateToHelicityBasis( double alpha, double beta,
                                          double gamma ) const override;
 
  private:
    std::array<EvtTensor4C, 5> m_eps;    //eps1,eps2,eps3,eps4,eps5;
 
    EvtTensorParticle( const EvtTensorParticle& tensor );
    EvtTensorParticle& operator=( const EvtTensorParticle& tensor );
};
 
#endif