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1 //
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24 // ********************************************************************
25 //
26 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file
28 //
29 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo
31 //
32 // - Created Hisaya Kurashige, 11 Aug. 2011
33 // - Update mass and width
34 // following PDG 2023 Shogo Okada, 5 Nov. 2023
35 // **********************************************************************
36 //
37
38 #include "G4SigmabPlus.hh"
39
40 #include "G4DecayTable.hh"
41 #include "G4ParticleTable.hh"
42 #include "G4PhaseSpaceDecayChannel.hh"
43 #include "G4String.hh"
44 #include "G4SystemOfUnits.hh"
45 #include "G4Types.hh"
46 #include "G4VDecayChannel.hh"
47
48 G4SigmabPlus* G4SigmabPlus::theInstance = nullptr;
49
50 G4SigmabPlus* G4SigmabPlus::Definition()
51 {
52 if (theInstance != nullptr) return theInstance;
53 const G4String name = "sigma_b+";
54 // search in particle table]
55 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
56 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
57 if (theInstance == nullptr) {
58 // create particle
59 //
60 // Arguments for constructor are as follows
61 // name mass width charge
62 // 2*spin parity C-conjugation
63 // 2*Isospin 2*Isospin3 G-parity
64 // type lepton number baryon number PDG encoding
65 // stable lifetime decay table
66 // shortlived subType anti_encoding
67
68 // clang-format off
69 anInstance = new G4ParticleDefinition(
70 name, 5.81056*GeV, 5.0*MeV, +1.0*eplus,
71 1, +1, 0,
72 2, +2, 0,
73 "baryon", 0, +1, 5222,
74 false, 0.0*ns, nullptr,
75 false, "sigma_b");
76 // clang-format on
77
78 // create Decay Table
79 auto table = new G4DecayTable();
80
81 // create decay channels
82 auto mode = new G4VDecayChannel*[1];
83 // sigma_b+ -> lambda_b + pi+
84 mode[0] = new G4PhaseSpaceDecayChannel("sigma_b+", 1.000, 2, "lambda_b", "pi+");
85
86 for (G4int index = 0; index < 1; index++)
87 table->Insert(mode[index]);
88 delete[] mode;
89
90 anInstance->SetDecayTable(table);
91 }
92 theInstance = static_cast<G4SigmabPlus*>(anInstance);
93 return theInstance;
94 }
95
96 G4SigmabPlus* G4SigmabPlus::SigmabPlusDefinition()
97 {
98 return Definition();
99 }
100
101 G4SigmabPlus* G4SigmabPlus::SigmabPlus()
102 {
103 return Definition();
104 }
105