//--------------------------------------------------------------------------
//
// 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/EvtSVVHelAmp.hh
//
// Description:
//
// Modification history:
//
//    DJL/RYD     August 11, 1998         Module created
//
//------------------------------------------------------------------------

#ifndef EVTSVVHELAMP_HH
#define EVTSVVHELAMP_HH

#include "EvtGenBase/EvtDecayAmp.hh"

//Class to handle decays of the form SCALAR -> VECTOR VECTOR
//according the the helicity amplitudes specified by the
//user.  There are 6 arguements, orders as amplitude then
//phase for H+, H0, and H-, in that order.

class EvtAmp;
class EvtParticle;
class EvtId;

class EvtSVVHelAmp:public  EvtDecayAmp  {

public:

  EvtSVVHelAmp() {}
  virtual ~EvtSVVHelAmp();

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

  void init();
  void initProbMax();

  void decay(EvtParticle *p); 

  static void SVVHel(EvtParticle *parent,EvtAmp& amp,EvtId n_v1,EvtId n_v2,
		     const EvtComplex& hp, const EvtComplex& h0,
		     const EvtComplex& hm);

};

#endif