EvtCPUtil.hh
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EvtCPUtil.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/EvtCPUtil.hh
	//
	// Description:Class to hold CP physics utilities.
	//
	// Modification history:
	//
	// RYD March 24, 1998 Module created
	//
	//------------------------------------------------------------------------

	#ifndef EVTCPUTIL_HH
	#define EVTCPUTIL_HH

	#include "EvtGenBase/EvtComplex.hh"
	#include "EvtGenBase/EvtPatches.hh"
	class EvtParticle;
	class EvtId;

	class EvtCPUtil {

	public:

	EvtCPUtil(int mixingType);
	~EvtCPUtil();

	enum MixingType {Coherent = 0, Incoherent = 1};

	static EvtCPUtil* getInstance();

	void setMixingType(int mixingType) {_mixingType = mixingType;}
	int getMixingType() {return _mixingType;}

	void fractB0CP(EvtComplex Af, EvtComplex Abarf,
	double deltam, double beta, double &fract);

	void fractB0nonCP(EvtComplex Af, EvtComplex Abarf,
	EvtComplex Afbar, EvtComplex Abarfbar,
	double deltam, double beta, int flip,
	double &fract);

	// Mark Whitehead 7/12/2009
	// Add required lines from EvtIncoherentMixing.hh to fix CPV

	// Functions to check if a B has mixed (comes from a B)
	bool isB0Mixed( EvtParticle * ) ;
	bool isBsMixed( EvtParticle * ) ;

	bool flipIsEnabled() ;
	void enableFlip() ;
	void disableFlip() ;

	void OtherB(EvtParticle *p, double &t, EvtId &otherb);

	void OtherCoherentB(EvtParticle *p, double &t, EvtId &otherb, double probB0);
	void OtherIncoherentB(EvtParticle *p, double &t, EvtId &otherb, double probB0);

	void OtherB(EvtParticle *p, double &t, EvtId &otherb, double probB0);

	//id is the produced particle
	//t returns the lifetime of the particle
	//and mix will be 1 if it mixed otherwise 0
	void incoherentMix(const EvtId id, double &t, int &mix);

	double getDeltaGamma(const EvtId id);
	double getDeltaM(const EvtId id);

	private:

	bool _enableFlip;
	int _mixingType;

	};


	#endif

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