EvtBtoXsgammaRootFinder.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) 2001      Brunel University
//
// Module: EvtGen/EvtBtoXsgammaRootFinder.hh
//
// Description:
//       Root finding algorithms using the bilear method. Basic structure
//       lifted from the BaBar IntegrationUtils root finding algorithm
//       (author John Back).
//
// Modification history:
//
//       Jane Tinslay     March 21, 2001         Module created
//
//------------------------------------------------------------------------
 
#ifndef EVTBTOXSGAMMAROOTFINDER_HH
#define EVTBTOXSGAMMAROOTFINDER_HH
 
//-------------
// C Headers --
//-------------
extern "C" {}
 
// #include "../EvtGenBase/EvtItgAbsFunction.hh"
class EvtItgAbsFunction;
 
class EvtBtoXsgammaRootFinder {
 
public:
  // Constructors
 
  EvtBtoXsgammaRootFinder();
 
  // Destructor
  virtual ~EvtBtoXsgammaRootFinder();
 
  double GetRootSingleFunc( const EvtItgAbsFunction* theFunc, double functionValue,
                            double lowerValue, double upperValue, double precision );
 
  double GetGaussIntegFcnRoot( EvtItgAbsFunction* theFunc1, EvtItgAbsFunction* theFunc2,
                               double integ1Precision, double integ2Precision, int maxLoop1,
                               int maxLoop2, double integLower, double integUpper,
                               double lowerValue, double upperValue, double precision );
 
private:
  EvtBtoXsgammaRootFinder( const EvtBtoXsgammaRootFinder& );            // Copy Constructor
  EvtBtoXsgammaRootFinder& operator=( const EvtBtoXsgammaRootFinder& ); // Assignment op
};
 
#endif