include/EvtGenBase/EvtStringParticle.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
0004 *                                                                      *
0005 * This file is part of EvtGen.                                         *
0006 *                                                                      *
0007 * EvtGen is free software: you can redistribute it and/or modify       *
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0010 * (at your option) any later version.                                  *
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0014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
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0016 *                                                                      *
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0019 ***********************************************************************/
0020
0021 #ifndef EVTSTRINGPARTICLE_HH
0022 #define EVTSTRINGPARTICLE_HH
0023
0024 #include "EvtGenBase/EvtId.hh"
0025 #include "EvtGenBase/EvtParticle.hh"
0026
0027 // Description: EvtStringParticle particle is a class to keep the
0028 //              collection of partons that are generated by jetset.
0029 //              This is supposedly the _only_ use of this particle.
0030
0031 class EvtStringParticle : public EvtParticle {
0032   public:
0033     void init( EvtId id, const EvtVector4R& p4 ) override;
0034     void initPartons( int npartons, EvtVector4R* p4partons, EvtId* idpartons );
0035     int getNPartons();
0036     EvtId getIdParton( int i );
0037     EvtVector4R getP4Parton( int i );
0038     EvtSpinDensity rotateToHelicityBasis() const override;
0039     EvtSpinDensity rotateToHelicityBasis( double alpha, double beta,
0040                                           double gamma ) const override;
0041
0042   private:
0043     std::vector<EvtVector4R> _p4partons;
0044     std::vector<EvtId> _idpartons;
0045
0046     EvtStringParticle& operator=( const EvtStringParticle& d );
0047 };
0048 #endif