include/EvtGenModels/EvtVSSBMixCPT.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
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0020
0021 #ifndef EVTVSSBMIXCPT_HH
0022 #define EVTVSSBMIXCPT_HH
0023
0024 #include "EvtGenBase/EvtComplex.hh"
0025 #include "EvtGenBase/EvtDecayAmp.hh"
0026 #include "EvtGenBase/EvtParticle.hh"
0027
0028 // Description:
0029 //    Routine to decay vector-> scalar scalar with coherent BB-like mixing
0030 //                              including CPT effects
0031 //    Based on VSSBMIX
0032
0033 class EvtVSSBMixCPT : public EvtDecayAmp {
0034   public:
0035     std::string getName() override;
0036     EvtDecayBase* clone() override;
0037
0038     void decay( EvtParticle* p ) override;
0039     void init() override;
0040     void initProbMax() override;
0041
0042     int nRealDaughters() override { return 2; }
0043
0044     std::string getParamName( int i ) override;
0045     std::string getParamDefault( int i ) override;
0046
0047   private:
0048     double _freq;    // mixing frequency in hbar/mm
0049     double _dGamma;
0050     EvtComplex _qoverp;
0051     EvtComplex _poverq;
0052     EvtComplex _z;
0053     double _chib0_b0bar;
0054     double _chib0bar_b0;
0055
0056     EvtComplex _A_f;
0057     EvtComplex _Abar_f;
0058
0059     EvtComplex _A_fbar;
0060     EvtComplex _Abar_fbar;
0061 };
0062
0063 #endif