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24 // ********************************************************************
25 //
26 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file
28 //
29 // Created Hisaya Kurashige, 16 June 1997
30 // **********************************************************************
31 // New impelemenataion as an utility class M.Asai, 26 July 2004
32 // ----------------------------------------------------------------------
33
34 #include "G4JPsi.hh"
35
36 #include "G4ParticleTable.hh"
37 #include "G4String.hh"
38 #include "G4SystemOfUnits.hh"
39
40 G4JPsi* G4JPsi::theInstance = nullptr;
41
42 G4JPsi* G4JPsi::Definition()
43 {
44 if (theInstance != nullptr) return theInstance;
45 const G4String name = "J/psi";
46 // search in particle table]
47 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
48 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
49 if (anInstance == nullptr) {
50 // create particle
51 //
52 // Arguments for constructor are as follows
53 // name mass width charge
54 // 2*spin parity C-conjugation
55 // 2*Isospin 2*Isospin3 G-parity
56 // type lepton number baryon number PDG encoding
57 // stable lifetime decay table
58 // shortlived subType anti_encoding
59
60 // clang-format off
61 anInstance = new G4ParticleDefinition(
62 name, 3.096916*GeV, 0.0929*MeV, 0.,
63 2, -1, -1,
64 0, 0, -1,
65 "meson", 0, 0, 443,
66 false, 0.0*ns, nullptr,
67 false, "J/psi", 443);
68 // clang-format on
69 }
70 theInstance = static_cast<G4JPsi*>(anInstance);
71 return theInstance;
72 }
73
74 G4JPsi* G4JPsi::JPsiDefinition()
75 {
76 return Definition();
77 }
78
79 G4JPsi* G4JPsi::JPsi()
80 {
81 return Definition();
82 }
83