include/EvtGenBase/EvtBreitWignerPdf.hh

0001
0002 /***********************************************************************
0003 * Copyright 1998-2020 CERN for the benefit of the EvtGen authors       *
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0020
0021 #ifndef EVT_BREIT_WIGNER_PDF_HH
0022 #define EVT_BREIT_WIGNER_PDF_HH
0023
0024 #include "EvtGenBase/EvtIntegPdf1D.hh"
0025
0026 // Breit-Wigner PDF
0027
0028 class EvtBreitWignerPdf : public EvtIntegPdf1D {
0029   public:
0030     EvtBreitWignerPdf( double min, double max, double m0, double g0 );
0031     EvtBreitWignerPdf( const EvtBreitWignerPdf& other );
0032
0033     double pdf( const EvtPoint1D& x ) const override;
0034     EvtPdf<EvtPoint1D>* clone() const override
0035     {
0036         return new EvtBreitWignerPdf( *this );
0037     }
0038
0039     double pdfIntegral( double m ) const override;
0040     double pdfIntegralInverse( double x ) const override;
0041
0042     // accessors
0043
0044     inline double m0() const { return _m0; }
0045     inline double g0() const { return _g0; }
0046
0047   private:
0048     double _m0;
0049     double _g0;
0050 };
0051
0052 #endif