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EvtTensorParticle.hh
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EvtTensorParticle.hh
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/***********************************************************************
* Copyright 1998-2020 CERN for the benefit of the EvtGen authors *
* *
* This file is part of EvtGen. *
* *
* EvtGen is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* EvtGen is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with EvtGen. If not, see <https://www.gnu.org/licenses/>. *
***********************************************************************/
#ifndef EVTTENSORPARTICLE_HH
#define EVTTENSORPARTICLE_HH
#include "EvtGenBase/EvtParticle.hh"
#include "EvtGenBase/EvtTensor4C.hh"
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:
EvtTensor4C eps[5]; //eps1,eps2,eps3,eps4,eps5;
EvtTensorParticle( const EvtTensorParticle& tensor );
EvtTensorParticle& operator=( const EvtTensorParticle& tensor );
};
#endif

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