//--------------------------------------------------------------------------
//
// 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/EvtTauHadnu.hh
//
// Description:
//
// Modification history:
//
//  Lange Oct 26, 2002 Created
//
//------------------------------------------------------------------------

#ifndef EVTTAUHADNUKS_HH
#define EVTTAUHADNUKS_HH

#include "EvtGenBase/EvtDecayAmp.hh"

class EvtParticle;

class EvtTauHadnu : public  EvtDecayAmp  {

public:
  
  EvtTauHadnu() {}
  virtual ~EvtTauHadnu();

  std::string getName();
  EvtDecayBase* clone();

  void initProbMax();
  void init();
  void decay(EvtParticle *p); 

private:
  double _beta;
  double  _mRho;
  double  _gammaRho;
  double  _mRhopr;
  double  _gammaRhopr;
  double _mA1;
  double _gammaA1;

  double gFunc(double m2,int dupD);
  EvtComplex Fpi( double s, double xm1, double xm2 );
  EvtComplex BW( double s, double m, double gamma, double xm1, double xm2 );
  
};

#endif