/*****************************************************************************
 * Project: RooFit                                                           *
 *                                                                           *
 * Copyright (c) 2000-2005, Regents of the University of California          *
 *                          and Stanford University. All rights reserved.    *
 *                                                                           *
 * Redistribution and use in source and binary forms,                        *
 * with or without modification, are permitted according to the terms        *
 * listed in LICENSE (http://roofit.sourceforge.net/license.txt)             *
 *****************************************************************************/

#ifndef ROORELBW
#define ROORELBW

#include "RooAbsPdf.h"
#include "RooRealProxy.h"
#include "RooAbsReal.h"
 
class RooRelBW : public RooAbsPdf {
public:
  RooRelBW(const char *name, const char *title,
	      RooAbsReal& _x,
	      RooAbsReal& _mass,
	      RooAbsReal& _width,
	      RooAbsReal& _mdau1,
	      RooAbsReal& _mdau2,
	      RooAbsReal& _Lmin,
	      RooAbsReal& _hp);
  RooRelBW(const RooRelBW& other, const char* name=0) ;
  virtual TObject* clone(const char* newname) const { return new RooRelBW(*this,newname); }
  inline virtual ~RooRelBW() { }

protected:

  RooRealProxy x ;
  RooRealProxy mass ;
  RooRealProxy width ;
  RooRealProxy mdau1 ;
  RooRealProxy mdau2 ;
  RooRealProxy Lmin ;
  RooRealProxy hp ;
  
  Double_t evaluate() const ;
  Double_t eval_momentum(Double_t m) const;
  Double_t eval_BlattWeisskopf(Double_t p) const;

private:

  ClassDef(RooRelBW,0) // Your description goes here...
};
 
#endif