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1 //
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18 // * This code implementation is the result of the scientific and *
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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 // H.Kurashige 7 July 1996
32 // **********************************************************************
33 // New impelemenataion as an utility class M.Asai, 26 July 2004
34 // ----------------------------------------------------------------
35
36 #include "G4AntiProton.hh"
37
38 #include "G4ParticleTable.hh"
39 #include "G4PhysicalConstants.hh"
40 #include "G4String.hh"
41 #include "G4SystemOfUnits.hh"
42 #include "G4Types.hh"
43
44 G4AntiProton* G4AntiProton::theInstance = nullptr;
45
46 G4AntiProton* G4AntiProton::Definition()
47 {
48 if (theInstance != nullptr) return theInstance;
49 const G4String name = "anti_proton";
50 // search in particle table]
51 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
52 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
53 if (anInstance == nullptr) {
54 // create particle
55 //
56 // Arguments for constructor are as follows
57 // name mass width charge
58 // 2*spin parity C-conjugation
59 // 2*Isospin 2*Isospin3 G-parity
60 // type lepton number baryon number PDG encoding
61 // stable lifetime decay table
62 // shortlived subType anti_encoding
63 // use constants in CLHEP
64 // static const double proton_mass_c2 = 938.27231 * MeV;
65
66 // clang-format off
67 anInstance = new G4ParticleDefinition(
68 name, proton_mass_c2, 0.0*MeV, -1.0*eplus,
69 1, +1, 0,
70 1, -1, 0,
71 "baryon", 0, -1, -2212,
72 true, -1.0, nullptr,
73 false, "nucleon", 2212
74 );
75 // clang-format on
76
77 // Magnetic Moment
78 G4double mN = eplus * hbar_Planck / 2. / (proton_mass_c2 / c_squared);
79 anInstance->SetPDGMagneticMoment(-2.792847351 * mN);
80 }
81 theInstance = static_cast<G4AntiProton*>(anInstance);
82 return theInstance;
83 }
84
85 G4AntiProton* G4AntiProton::AntiProtonDefinition()
86 {
87 return Definition();
88 }
89
90 G4AntiProton* G4AntiProton::AntiProton()
91 {
92 return Definition();
93 }
94