1 //--------------------------------------------------------------------------
4 // This software is part of the EvtGen package developed jointly
5 // for the BaBar and CLEO collaborations. If you use all or part
6 // of it, please give an appropriate acknowledgement.
8 // Copyright Information: See EvtGen/COPYRIGHT
9 // Copyright (C) 1998 Caltech, UCSB
11 // Module: EvtGen/EvtNeutrinoParticle.hh
13 // Description:Class to describe neutrinos
15 // Modification history:
17 // RYD September 25, 1996 Module created
19 //------------------------------------------------------------------------
21 #ifndef EVTNEUTRINOPARTICLE_HH
22 #define EVTNEUTRINOPARTICLE_HH
24 #include "EvtGenBase/EvtDiracSpinor.hh"
25 #include "EvtGenBase/EvtParticle.hh"
29 class EvtNeutrinoParticle:public EvtParticle {
33 EvtNeutrinoParticle();
34 virtual ~EvtNeutrinoParticle();
35 void init(EvtId part_n,const EvtVector4R& p4);
36 EvtDiracSpinor spParentNeutrino() const;
37 EvtDiracSpinor spNeutrino() const;
38 EvtSpinDensity rotateToHelicityBasis() const;
39 EvtSpinDensity rotateToHelicityBasis(double alpha,
45 EvtDiracSpinor spinor_rest;
46 EvtDiracSpinor spinor_parent;
48 EvtNeutrinoParticle(const EvtNeutrinoParticle& n);
49 EvtNeutrinoParticle& operator=(const EvtNeutrinoParticle& n);