EvtMassAmp.hh

Go to the documentation of this file.

//-----------------------------------------------------------------------
// File and Version Information:
//      $Id: EvtMassAmp.hh,v 1.2 2011/01/06 22:57:56 pingrg Exp $
//
// 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:
//      Copyright (C) 1998 Caltech, UCSB
//
// Module creator:
//      Alexei Dvoretskii, Caltech, 2001-2002.
//-----------------------------------------------------------------------
 
// Relativistic lineshape for a two-body decay of a resonance to two
// pseudoscalars. The mass dependence of the width and the vertex factors
// are included in the calculation.
 
#ifndef EVT_MASSAMP_HH
#define EVT_MASSAMP_HH
 
#include "EvtAmplitude.hh"
#include "EvtPoint1D.hh"
#include "EvtPropBreitWignerRel.hh"
#include "EvtTwoBodyVertex.hh"
 
class EvtMassAmp : public EvtAmplitude<EvtPoint1D> {
public:
  EvtMassAmp( const EvtPropBreitWignerRel& prop, const EvtTwoBodyVertex& vd );
  EvtMassAmp( const EvtMassAmp& other );
  virtual ~EvtMassAmp();
 
  virtual EvtComplex amplitude( const EvtPoint1D& p ) const;
 
  virtual EvtAmplitude<EvtPoint1D>* clone() const { return new EvtMassAmp( *this ); }
 
  void setBirthVtx( const EvtTwoBodyVertex& vb ) { _vb = new EvtTwoBodyVertex( vb ); }
 
  void addBirthFact() { _useBirthFact = true; }
  void addDeathFact() { _useDeathFact = true; }
  void addBirthFactFF() { _useBirthFactFF = true; }
  void addDeathFactFF() { _useDeathFactFF = true; }
  void fixUpMassForMax() { _fixUpMassForMax = true; }
  void addFactorPn( double factor ) { _addfactor = factor; }
 
private:
  EvtPropBreitWignerRel _prop;
  EvtTwoBodyVertex      _vd;
  EvtTwoBodyVertex*     _vb;
  double                _addfactor;
 
  bool _useBirthFact;
  bool _useDeathFact;
  bool _useBirthFactFF;
  bool _useDeathFactFF;
  bool _fixUpMassForMax;
};
 
#endif