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25 // 25 //
26 // ------------------------------------------- 26 // ----------------------------------------------------------------
27 // GEANT 4 class implementation file 27 // GEANT 4 class implementation file
28 // 28 //
29 // History: first implementation, 8 June 29 // History: first implementation, 8 June 1998 Hisaya Kurashige
30 // ******************************************* 30 // **********************************************************************
31 // New impelemenataion as an utility class M 31 // New impelemenataion as an utility class M.Asai, 26 July 2004
32 // ------------------------------------------- 32 // ----------------------------------------------------------------------
33 // Update mass (PDG2006) Oc 33 // Update mass (PDG2006) Oct. 11 2006 H.Kurashige
34 // Update width (PDG2023) No 34 // Update width (PDG2023) Nov. 5 2023 S.Okada
35 35
36 #include "G4EtaPrime.hh" 36 #include "G4EtaPrime.hh"
37 37
38 #include "G4DecayTable.hh" 38 #include "G4DecayTable.hh"
39 #include "G4ParticleTable.hh" 39 #include "G4ParticleTable.hh"
40 #include "G4PhaseSpaceDecayChannel.hh" 40 #include "G4PhaseSpaceDecayChannel.hh"
41 #include "G4String.hh" 41 #include "G4String.hh"
42 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
43 #include "G4Types.hh" 43 #include "G4Types.hh"
44 #include "G4VDecayChannel.hh" 44 #include "G4VDecayChannel.hh"
45 45
46 G4EtaPrime* G4EtaPrime::theInstance = nullptr; 46 G4EtaPrime* G4EtaPrime::theInstance = nullptr;
47 47
48 G4EtaPrime* G4EtaPrime::Definition() 48 G4EtaPrime* G4EtaPrime::Definition()
49 { 49 {
50 if (theInstance != nullptr) return theInstan 50 if (theInstance != nullptr) return theInstance;
51 const G4String name = "eta_prime"; 51 const G4String name = "eta_prime";
52 // search in particle table] 52 // search in particle table]
53 G4ParticleTable* pTable = G4ParticleTable::G 53 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
54 G4ParticleDefinition* anInstance = pTable->F 54 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
55 if (anInstance == nullptr) { 55 if (anInstance == nullptr) {
56 // create particle 56 // create particle
57 // 57 //
58 // Arguments for constructor are as fol 58 // Arguments for constructor are as follows
59 // name mass 59 // name mass width charge
60 // 2*spin parity C- 60 // 2*spin parity C-conjugation
61 // 2*Isospin 2*Isospin3 61 // 2*Isospin 2*Isospin3 G-parity
62 // type lepton number ba 62 // type lepton number baryon number PDG encoding
63 // stable lifetime 63 // stable lifetime decay table
64 // shortlived subType 64 // shortlived subType anti_encoding
65 65
66 // clang-format off 66 // clang-format off
67 anInstance = new G4ParticleDefinition( 67 anInstance = new G4ParticleDefinition(
68 name, 0.95778*GeV, 0. 68 name, 0.95778*GeV, 0.188*MeV, 0.0,
69 0, -1, 69 0, -1, +1,
70 0, 0, 70 0, 0, +1,
71 "meson", 0, 71 "meson", 0, 0, 331,
72 false, 0.0*ns, 72 false, 0.0*ns, nullptr,
73 false, "eta_prime", 73 false, "eta_prime", 331);
74 // clang-format on 74 // clang-format on
75 75
76 // create Decay Table 76 // create Decay Table
77 auto table = new G4DecayTable(); 77 auto table = new G4DecayTable();
78 78
79 // create decay channels 79 // create decay channels
80 auto mode = new G4VDecayChannel*[5]; 80 auto mode = new G4VDecayChannel*[5];
81 // EtaPrime -> eta + pi+ + pi- 81 // EtaPrime -> eta + pi+ + pi-
82 mode[0] = new G4PhaseSpaceDecayChannel("et 82 mode[0] = new G4PhaseSpaceDecayChannel("eta_prime", 0.429, 3, "eta", "pi+", "pi-");
83 // EtaPrime -> eta + pi0 + pi0 83 // EtaPrime -> eta + pi0 + pi0
84 mode[1] = new G4PhaseSpaceDecayChannel("et 84 mode[1] = new G4PhaseSpaceDecayChannel("eta_prime", 0.222, 3, "eta", "pi0", "pi0");
85 // EtaPrime -> rho0 + gamma 85 // EtaPrime -> rho0 + gamma
86 mode[2] = new G4PhaseSpaceDecayChannel("et 86 mode[2] = new G4PhaseSpaceDecayChannel("eta_prime", 0.291, 2, "rho0", "gamma");
87 87
88 // EtaPrime -> gamma + gamma 88 // EtaPrime -> gamma + gamma
89 mode[3] = new G4PhaseSpaceDecayChannel("et 89 mode[3] = new G4PhaseSpaceDecayChannel("eta_prime", 0.0220, 2, "gamma", "gamma");
90 90
91 // EtaPrime -> omega + gamma 91 // EtaPrime -> omega + gamma
92 mode[4] = new G4PhaseSpaceDecayChannel("et 92 mode[4] = new G4PhaseSpaceDecayChannel("eta_prime", 0.0275, 2, "omega", "gamma");
93 93
94 for (G4int index = 0; index < 5; index++) 94 for (G4int index = 0; index < 5; index++)
95 table->Insert(mode[index]); 95 table->Insert(mode[index]);
96 delete[] mode; 96 delete[] mode;
97 97
98 anInstance->SetDecayTable(table); 98 anInstance->SetDecayTable(table);
99 } 99 }
100 theInstance = static_cast<G4EtaPrime*>(anIns 100 theInstance = static_cast<G4EtaPrime*>(anInstance);
101 return theInstance; 101 return theInstance;
102 } 102 }
103 103
104 G4EtaPrime* G4EtaPrime::EtaPrimeDefinition() 104 G4EtaPrime* G4EtaPrime::EtaPrimeDefinition()
105 { 105 {
106 return Definition(); 106 return Definition();
107 } 107 }
108 108
109 G4EtaPrime* G4EtaPrime::EtaPrime() 109 G4EtaPrime* G4EtaPrime::EtaPrime()
110 { 110 {
111 return Definition(); 111 return Definition();
112 } 112 }
113 113