EvtPFermi.hh
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EvtPFermi.hh
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	//-----------------------------------------------------------------------
	// File and Version Information:
	//
	// Copyright Information: See EvtGen/COPYRIGHT
	//
	//
	// Description:
	// DFN model:
	// F(k+) = N (1-x)^a exp((1+a)x) ,x=k+/(mB-mb)
	// the fermi motion distribution according to
	// hep-ph/9905351 v2
	// BLNP model:
	// F(what,Lambda,b) = pow(_b,_b)/(tgamma(_b)_Lambda)pow(what/_Lambda,_b-1)*
	// exp(-_b*what/Lambda);
	// the leading order shape function (exp) (hep-ph/0504071)
	// Environment:
	// Software developed for the BaBar Detector at the SLAC B-Factory.
	//
	// Author List:
	// Sven Menke (DFN model)
	// Alexei Volk (BLNP model)
	//-----------------------------------------------------------------------

	#ifndef EVTPFERMI_HH
	#define EVTPFERMI_HH

	class EvtPFermi {

	public:

	// Constructors

	EvtPFermi(const double &a, const double &mB, const double &mb);
	EvtPFermi(const double &Lambda, const double &b);

	// Destructor

	virtual ~EvtPFermi( );

	// Operators

	// Selectors

	// Modifiers

	// Methods

	double getFPFermi(const double &kplus);
	double getSFBLNP(const double &what);

	protected:

	// Helper functions

	private:

	// Friends

	// Data members

	double _a;
	double _mb;
	double _mB;
	double _Lambda;
	double _b;
	};


	#endif // EVTPFERMI_HH