EvtVub.hh

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//--------------------------------------------------------------------------
//
// 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/EvtVub.hh
//
// Description:
// Class to generate inclusive B to X_u l nu decays according to various
// decay models. Implemtented are ACCM, parton-model and a QCD model.
//
// Modification history:
//
//   Sven Menke     January 17, 2001         Module created
//
//------------------------------------------------------------------------
 
#ifndef EVTVUB_HH
#define EVTVUB_HH
 
#include "../EvtGenBase/EvtDecayIncoherent.hh"
 
#include <vector>
 
class EvtParticle;
class EvtVubdGamma;
class RandGeneral;
 
class EvtVub : public EvtDecayIncoherent {
 
public:
  EvtVub() {}
  virtual ~EvtVub();
 
  void getName( std::string& name );
 
  EvtDecayBase* clone();
 
  void initProbMax();
 
  void init();
 
  void decay( EvtParticle* p );
 
private:
  double  _mb;     // the b-quark pole mass in GeV (try 4.65 to 4.9)
  double  _a;      // Parameter for the Fermi Motion (1.29 is good)
  double  _alphas; // Strong Coupling at m_b (around 0.24)
  double  _dGMax;  // max dGamma*p2 value;
  int     _nbins;
  int     _storeQplus;
  double* _masses;
  double* _weights;
 
  EvtVubdGamma*       _dGamma; // calculates the decay rate
  double              findPFermi();
  std::vector<double> _pf;
};
 
#endif