EvtBtoXsgammaRootFinder.hh
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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

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