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EvtDiracParticle.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 EVTDIRACPARTICLE_HH
#define EVTDIRACPARTICLE_HH
#include "EvtGenBase/EvtDiracSpinor.hh"
#include "EvtGenBase/EvtParticle.hh"
class EvtId;
class EvtVector4R;
class EvtDiracParticle : public EvtParticle {
public:
EvtDiracParticle() = default;
void init( EvtId part_n, const EvtVector4R& p4 ) override;
void init( EvtId part_n, const EvtVector4R& p4, const EvtDiracSpinor&,
const EvtDiracSpinor&, const EvtDiracSpinor&,
const EvtDiracSpinor& );
EvtDiracSpinor spParent( int i ) const override { return _spinorParent[i]; }
EvtDiracSpinor sp( int i ) const override { return _spinorRest[i]; }
EvtSpinDensity rotateToHelicityBasis() const override;
EvtSpinDensity rotateToHelicityBasis( double alpha, double beta,
double gamma ) const override;
private:
EvtDiracSpinor _spinorRest[2];
EvtDiracSpinor _spinorParent[2];
EvtDiracParticle( const EvtDiracParticle& d );
EvtDiracParticle& operator=( const EvtDiracParticle& d );
};
#endif

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