BesEvtGen-00-04-08/src/EvtGen/EvtGenBase/EvtNeutrinoParticle.hh

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//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
//      Copyright (C) 1998      Caltech, UCSB
//
// Module: EvtGen/EvtNeutrinoParticle.hh
//
// Description:Class to describe neutrinos
//
// Modification history:
//
//    RYD     September 25, 1996         Module created
//
//------------------------------------------------------------------------
 
#ifndef EVTNEUTRINOPARTICLE_HH
#define EVTNEUTRINOPARTICLE_HH
 
#include "EvtGenBase/EvtDiracSpinor.hh"
#include "EvtGenBase/EvtParticle.hh"
//#include "EvtGenBase/EvtId.hh"
class EvtId;
class EvtVector4R;
 
class EvtNeutrinoParticle:public EvtParticle {
 
public:
 
  EvtNeutrinoParticle();
  virtual ~EvtNeutrinoParticle();
  void init(EvtId part_n,const EvtVector4R& p4);
//Return spinors
  EvtDiracSpinor spParentNeutrino() const;
  EvtDiracSpinor spNeutrino() const;
  EvtSpinDensity rotateToHelicityBasis() const;
  EvtSpinDensity rotateToHelicityBasis(double alpha,
                       double beta,
                       double gamma) const;
  
private:
 
  EvtDiracSpinor spinor_rest;
  EvtDiracSpinor spinor_parent;
 
  EvtNeutrinoParticle(const EvtNeutrinoParticle& n);
  EvtNeutrinoParticle& operator=(const EvtNeutrinoParticle& n);
 
};
#endif