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25 //
26 // G4KL3DecayChannel
27
28 // Author: H.Kurashige, 30 May 1997
29 // --------------------------------------------------------------------
30 #ifndef G4KL3DecayChannel_hh
31 #define G4KL3DecayChannel_hh 1
32
33 #include "G4VDecayChannel.hh"
34 #include "G4ios.hh"
35 #include "globals.hh"
36
37 class G4KL3DecayChannel : public G4VDecayChannel
38 {
39 public:
40 // Constructor & destructor
41 G4KL3DecayChannel(const G4String& theParentName, G4double theBR, const G4String& thePionName,
42 const G4String& theLeptonName, const G4String& theNutrinoName);
43 ~G4KL3DecayChannel() override = default;
44
45 G4DecayProducts* DecayIt(G4double) override;
46
47 inline void SetDalitzParameter(G4double aLambda, G4double aXi);
48 inline G4double GetDalitzParameterLambda() const;
49 inline G4double GetDalitzParameterXi() const;
50
51 protected:
52 // Copy constructor and assignment operator
53 G4KL3DecayChannel(const G4KL3DecayChannel&) = default;
54 G4KL3DecayChannel& operator=(const G4KL3DecayChannel&);
55
56 // Assignment of daughter particles for arrays of daughters[] etc.
57 enum
58 {
59 idPi = 0,
60 idLepton = 1,
61 idNutrino = 2
62 };
63
64 // Calculate momentum of daughters
65 void PhaseSpace(G4double Mparent, const G4double* Mdaughter, G4double* Edaughter,
66 G4double* Pdaughter);
67
68 // Dalitz Plot Density
69 // KL3 decay Dalitz Plot Density, see Chounet et al Phys. Rep. 4, 201
70 // Arguments
71 // Epi: kinetic enregy of pion
72 // El: kinetic enregy of lepton (e or mu)
73 // Enu: kinetic energy of nutrino
74 // Constants
75 // pLambda : linear energy dependence of f+
76 // pXi0 : = f+(0)/f-
77 // pNorm : normalization factor
78 G4double DalitzDensity(G4double parentmass, G4double Epi, G4double El, G4double Enu,
79 G4double massPi, G4double massL, G4double massNu);
80
81 private:
82 G4KL3DecayChannel() = default;
83
84 private:
85 // Used in DalitzDensity() coefficients
86 G4double pLambda = 0.0;
87 G4double pXi0 = 0.0;
88 };
89
90 // ------------------------
91 // Inline methods
92 // ------------------------
93
94 inline void G4KL3DecayChannel::SetDalitzParameter(G4double aLambda, G4double aXi)
95 {
96 pLambda = aLambda;
97 pXi0 = aXi;
98 }
99
100 inline G4double G4KL3DecayChannel::GetDalitzParameterLambda() const
101 {
102 return pLambda;
103 }
104
105 inline G4double G4KL3DecayChannel::GetDalitzParameterXi() const
106 {
107 return pXi0;
108 }
109
110 #endif
111