EvtRhoPi.hh

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//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of models developed at BES collaboration
//      based on the EvtGen framework.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/BesCopyright
//      Copyright (A) 2006      Ping Rong-Gang @IHEP
//
// Module:  EvtRhoPi.cc
//
// Description: Jpsi or psi(2S) decays into 3 pions via rho(1--)pi
//
// Modification history:
//
//    Ping R.-G.       Apr., 2007       Module created
//
//------------------------------------------------------------------------
 
#ifndef EVTRHOPI_HH
#define EVTRHOPI_HH
 
#include "../EvtGenBase/EvtDecayIncoherent.hh"
#include "../EvtGenBase/EvtVector4R.hh"
 
class EvtParticle;
 
class EvtRhoPi : public EvtDecayIncoherent {
 
public:
  EvtRhoPi() {}
  virtual ~EvtRhoPi();
 
  void getName( std::string& name );
 
  EvtDecayBase* clone();
 
  void initProbMax();
 
  void init();
 
  void decay( EvtParticle* p );
 
  double AmplitudeSquare( double ResonanceMass, double ResonanceWidth, double r1, double r2,
                          double phase1, double phase2 );
 
  EvtVector4R GetDaugMomLab( int i ) { return _p4Lab[i]; }
  EvtVector4R GetDaugMomCM( int i ) { return _p4CM[i]; }
  EvtVector4R GetDaugMomHel( int i ) { return _p4Hel[i]; }
 
  int GetNdaug() { return _nd; }
 
private:
  EvtVector4R _p4Lab[10], _p4CM[10], _p4Hel[10];
  int         _nd;
};
 
#endif