EvtIncoherentMixing.hh

Go to the documentation of this file.

 
/***********************************************************************
* Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
*                                                                      *
* This file is part of EvtGen.                                         *
*                                                                      *
* EvtGen is free software: you can redistribute it and/or modify       *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or    *
* (at your option) any later version.                                  *
*                                                                      *
* EvtGen is distributed in the hope that it will be useful,            *
* but WITHOUT ANY WARRANTY; without even the implied warranty of       *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        *
* GNU General Public License for more details.                         *
*                                                                      *
* You should have received a copy of the GNU General Public License    *
* along with EvtGen.  If not, see <https://www.gnu.org/licenses/>.     *
***********************************************************************/
 
#ifndef EVTINCOHERENTMIXING_HH
#define EVTINCOHERENTMIXING_HH 1
 
// Include files
 
#include "EvtGenBase/EvtParticle.hh"

class EvtIncoherentMixing {
  public:
    EvtIncoherentMixing();
 
    ~EvtIncoherentMixing();    
 
    // activate or desactivate the Bs mixing
    static void setB0Mixing();
    static void unsetB0Mixing();
 
    // activate or desactivate the B0 mixing
    static void setBsMixing();
    static void unsetBsMixing();
 
    // is mixing activated ?
    static bool doB0Mixing();
    static bool doBsMixing();
 
    // set values for the mixing
    static void setdGammad( double value );
    static void setdeltamd( double value );
    static void setdGammas( double value );
    static void setdeltams( double value );
 
    // get parameters for mixing
    static double getdGammad();
    static double getdeltamd();
    static double getdGammas();
    static double getdeltams();
 
    // Functions to obtain time and type of the mixing ( 1 mix, 0 unmix )
    static void incoherentB0Mix( const EvtId id, double& t, int& mix );
    static void incoherentBsMix( const EvtId id, double& t, int& mix );
 
    // Functions to check if a B has mixed (comes from a B)
    static bool isB0Mixed( EvtParticle* );
    static bool isBsMixed( EvtParticle* );
 
    // Functions for CP models
    // returns for particle p the decay time t , the flavour of the tag
    // side (B0, anti-B0, B_s0, anti-B_s0). The flavour of p can flip
    // with probability probB
    static void OtherB( EvtParticle* p, double& t, EvtId& otherb, double probB );
    static void OtherB( EvtParticle* p, double& t, EvtId& otherb );
 
    static bool flipIsEnabled();
    static void enableFlip();
    static void disableFlip();
 
  protected:
  private:
    static bool m_doB0Mixing;
    static bool m_doBsMixing;
    static double m_dGammad;
    static double m_deltamd;
    static double m_dGammas;
    static double m_deltams;
    static bool m_enableFlip;
};
#endif    // EVTGENBASE_EVTINCOHERENTMIXING_HH