include/EvtGenBase/EvtIncoherentMixing.hh

0001
0002 /***********************************************************************
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0020
0021 #ifndef EVTINCOHERENTMIXING_HH
0022 #define EVTINCOHERENTMIXING_HH 1
0023
0024 // Include files
0025
0026 #include "EvtGenBase/EvtParticle.hh"
0027
0028 /** @class EvtIncoherentMixing EvtIncoherentMixing.hh EvtGenBase/EvtIncoherentMixing.hh
0029  *  Class to contain the parameters of the incoherent B0 and B0S mixing
0030  *
0031  *  @author Patrick Robbe
0032  *  @date   2003-10-09
0033  */
0034 class EvtIncoherentMixing {
0035   public:
0036     /// Standard constructor
0037     EvtIncoherentMixing();
0038
0039     ~EvtIncoherentMixing();    ///< Destructor
0040
0041     // activate or desactivate the Bs mixing
0042     static void setB0Mixing();
0043     static void unsetB0Mixing();
0044
0045     // activate or desactivate the B0 mixing
0046     static void setBsMixing();
0047     static void unsetBsMixing();
0048
0049     // is mixing activated ?
0050     static bool doB0Mixing();
0051     static bool doBsMixing();
0052
0053     // set values for the mixing
0054     static void setdGammad( double value );
0055     static void setdeltamd( double value );
0056     static void setdGammas( double value );
0057     static void setdeltams( double value );
0058
0059     // get parameters for mixing
0060     static double getdGammad();
0061     static double getdeltamd();
0062     static double getdGammas();
0063     static double getdeltams();
0064
0065     // Functions to obtain time and type of the mixing ( 1 mix, 0 unmix )
0066     static void incoherentB0Mix( const EvtId id, double& t, int& mix );
0067     static void incoherentBsMix( const EvtId id, double& t, int& mix );
0068
0069     // Functions to check if a B has mixed (comes from a B)
0070     static bool isB0Mixed( EvtParticle* );
0071     static bool isBsMixed( EvtParticle* );
0072
0073     // Functions for CP models
0074     // returns for particle p the decay time t , the flavour of the tag
0075     // side (B0, anti-B0, B_s0, anti-B_s0). The flavour of p can flip
0076     // with probability probB
0077     static void OtherB( EvtParticle* p, double& t, EvtId& otherb, double probB );
0078     static void OtherB( EvtParticle* p, double& t, EvtId& otherb );
0079
0080     static bool flipIsEnabled();
0081     static void enableFlip();
0082     static void disableFlip();
0083
0084   protected:
0085   private:
0086     static bool _doB0Mixing;
0087     static bool _doBsMixing;
0088     static double _dGammad;
0089     static double _deltamd;
0090     static double _dGammas;
0091     static double _deltams;
0092     static bool _enableFlip;
0093 };
0094 #endif    // EVTGENBASE_EVTINCOHERENTMIXING_HH