include/EvtGenModels/EvtBcToNPi.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
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0020
0021 #ifndef EvtBcToNPi_HH
0022 #define EvtBcToNPi_HH
0023
0024 #include "EvtGenBase/EvtComplex.hh"
0025 #include "EvtGenBase/EvtDecayAmp.hh"
0026 #include "EvtGenBase/EvtDecayBase.hh"
0027 #include "EvtGenBase/EvtParticle.hh"
0028 #include "EvtGenBase/EvtVector4R.hh"
0029
0030 #include <string>
0031
0032 // Description: General decay model for Bc -> V + npi and Bc -> P + npi
0033
0034 class EvtBcToNPi : public EvtDecayAmp {
0035   public:
0036     EvtBcToNPi( bool printAuthorInfo = false );
0037
0038     std::string getName() override;
0039
0040     EvtDecayBase* clone() override;
0041
0042     void initProbMax() override;
0043
0044     void init() override;
0045
0046     void decay( EvtParticle* p ) override;
0047
0048   protected:
0049     int nCall;
0050     double maxAmp2;
0051
0052     // Bc form factors
0053     double _maxProb;
0054     double FA0_N, FA0_c1, FA0_c2;
0055     double FAm_N, FAm_c1, FAm_c2;
0056     double FAp_N, FAp_c1, FAp_c2;
0057     double FV_N, FV_c1, FV_c2;
0058
0059     double Fp_N, Fp_c1, Fp_c2;
0060     double Fm_N, Fm_c1, Fm_c2;
0061
0062     // W -> pi... form factors
0063     double _beta;
0064     double _mRho;
0065     double _gammaRho;
0066     double _mRhopr;
0067     double _gammaRhopr;
0068     double _mA1;
0069     double _gammaA1;
0070
0071     double _ee( double M, double m1, double m2 );
0072     double _pp( double M, double m1, double m2 );
0073     EvtComplex Fpi( EvtVector4R q1, EvtVector4R q2 );
0074     double pi3G( double m2, int dupD );
0075
0076   private:
0077     void printAuthorInfo();
0078 };
0079
0080 #endif