include/Geant4/G4KL3DecayChannel.hh

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0025 //
0026 // G4KL3DecayChannel
0027
0028 // Author: H.Kurashige, 30 May 1997
0029 // --------------------------------------------------------------------
0030 #ifndef G4KL3DecayChannel_hh
0031 #define G4KL3DecayChannel_hh 1
0032
0033 #include "G4VDecayChannel.hh"
0034 #include "G4ios.hh"
0035 #include "globals.hh"
0036
0037 class G4KL3DecayChannel : public G4VDecayChannel
0038 {
0039   public:
0040     // Constructor & destructor
0041     G4KL3DecayChannel(const G4String& theParentName, G4double theBR, const G4String& thePionName,
0042                       const G4String& theLeptonName, const G4String& theNutrinoName);
0043     ~G4KL3DecayChannel() override = default;
0044
0045     G4DecayProducts* DecayIt(G4double) override;
0046
0047     inline void SetDalitzParameter(G4double aLambda, G4double aXi);
0048     inline G4double GetDalitzParameterLambda() const;
0049     inline G4double GetDalitzParameterXi() const;
0050
0051   protected:
0052     // Copy constructor and assignment operator
0053     G4KL3DecayChannel(const G4KL3DecayChannel&) = default;
0054     G4KL3DecayChannel& operator=(const G4KL3DecayChannel&);
0055
0056     // Assignment of daughter particles for arrays of daughters[] etc.
0057     enum
0058     {
0059       idPi = 0,
0060       idLepton = 1,
0061       idNutrino = 2
0062     };
0063
0064     // Calculate momentum of daughters
0065     void PhaseSpace(G4double Mparent, const G4double* Mdaughter, G4double* Edaughter,
0066                     G4double* Pdaughter);
0067
0068     // Dalitz Plot Density
0069     // KL3 decay   Dalitz Plot Density, see Chounet et al Phys. Rep. 4, 201
0070     //  Arguments
0071     //    Epi: kinetic enregy of pion
0072     //    El:  kinetic enregy of lepton (e or mu)
0073     //    Enu: kinetic energy of nutrino
0074     //  Constants
0075     //    pLambda : linear energy dependence of f+
0076     //    pXi0    : = f+(0)/f-
0077     //    pNorm   : normalization factor
0078     G4double DalitzDensity(G4double parentmass, G4double Epi, G4double El, G4double Enu,
0079                            G4double massPi, G4double massL, G4double massNu);
0080
0081   private:
0082     G4KL3DecayChannel() = default;
0083
0084   private:
0085     // Used in DalitzDensity() coefficients
0086     G4double pLambda = 0.0;
0087     G4double pXi0 = 0.0;
0088 };
0089
0090 // ------------------------
0091 // Inline methods
0092 // ------------------------
0093
0094 inline void G4KL3DecayChannel::SetDalitzParameter(G4double aLambda, G4double aXi)
0095 {
0096   pLambda = aLambda;
0097   pXi0 = aXi;
0098 }
0099
0100 inline G4double G4KL3DecayChannel::GetDalitzParameterLambda() const
0101 {
0102   return pLambda;
0103 }
0104
0105 inline G4double G4KL3DecayChannel::GetDalitzParameterXi() const
0106 {
0107   return pXi0;
0108 }
0109
0110 #endif