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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
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4 // * 4 // * *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 //
>> 27 // $Id: G4TauMinus.cc 69015 2013-04-15 09:46:48Z gcosmo $
>> 28 //
>> 29 //
26 // ------------------------------------------- 30 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 31 // GEANT 4 class implementation file
28 // 32 //
29 // History: first implementation, based o 33 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 34 // 4th April 1996, G.Cosmo
31 // 7 July 1996 H.Kurash << 35 // 7 July 1996 H.Kurashige
32 // ******************************************* 36 // **********************************************************************
33 // New impelemenataion as an utility class M 37 // New impelemenataion as an utility class M.Asai, 26 July 2004
34 // ------------------------------------------- 38 // ----------------------------------------------------------------------
35 39
36 #include "G4TauMinus.hh" 40 #include "G4TauMinus.hh"
37 <<
38 #include "G4DecayTable.hh" <<
39 #include "G4ParticleTable.hh" <<
40 #include "G4PhaseSpaceDecayChannel.hh" <<
41 #include "G4PhysicalConstants.hh" 41 #include "G4PhysicalConstants.hh"
42 #include "G4String.hh" <<
43 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
>> 43 #include "G4ParticleTable.hh"
>> 44
>> 45 #include "G4PhaseSpaceDecayChannel.hh"
44 #include "G4TauLeptonicDecayChannel.hh" 46 #include "G4TauLeptonicDecayChannel.hh"
45 #include "G4Types.hh" << 47 #include "G4DecayTable.hh"
46 #include "G4VDecayChannel.hh" <<
47 48
48 G4TauMinus* G4TauMinus::theInstance = nullptr; << 49 // ######################################################################
>> 50 // ### TAUMINUS ###
>> 51 // ######################################################################
>> 52 G4TauMinus* G4TauMinus::theInstance = 0;
49 53
50 G4TauMinus* G4TauMinus::Definition() 54 G4TauMinus* G4TauMinus::Definition()
51 { 55 {
52 if (theInstance != nullptr) return theInstan << 56 if (theInstance !=0) return theInstance;
53 const G4String name = "tau-"; 57 const G4String name = "tau-";
54 // search in particle table] 58 // search in particle table]
55 G4ParticleTable* pTable = G4ParticleTable::G 59 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
56 G4ParticleDefinition* anInstance = pTable->F 60 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
57 if (anInstance == nullptr) { << 61 if (anInstance ==0)
58 // create particle << 62 {
59 // << 63 // create particle
60 // Arguments for constructor are as fol << 64 //
61 // name mass << 65 // Arguments for constructor are as follows
62 // 2*spin parity C- << 66 // name mass width charge
63 // 2*Isospin 2*Isospin3 << 67 // 2*spin parity C-conjugation
64 // type lepton number ba << 68 // 2*Isospin 2*Isospin3 G-parity
65 // stable lifetime << 69 // type lepton number baryon number PDG encoding
66 // shortlived subType << 70 // stable lifetime decay table
67 << 71 // shortlived subType anti_encoding
68 // clang-format off <<
69 anInstance = new G4ParticleDefinition( 72 anInstance = new G4ParticleDefinition(
70 name, 1.77686*GeV, 2.267 << 73 name, 1.77682*GeV, 2.265e-9*MeV, -1.*eplus,
71 1, 0, 0, 74 1, 0, 0,
72 0, 0, 0, 75 0, 0, 0,
73 "lepton", 1, 76 "lepton", 1, 0, 15,
74 false, 290.3e-6*ns, nullptr, << 77 false, 290.6e-6*ns, NULL,
75 false, "tau" 78 false, "tau"
76 ); 79 );
77 // clang-format on <<
78 <<
79 // Bohr Magnetron <<
80 G4double muB = -0.5 * eplus * hbar_Planck <<
81 80
82 anInstance->SetPDGMagneticMoment(muB * 1.0 << 81 // Bohr Magnetron
>> 82 G4double muB = -0.5*eplus*hbar_Planck/(anInstance->GetPDGMass()/c_squared) ;
>> 83
>> 84 anInstance->SetPDGMagneticMoment( muB * 1.00118);
>> 85
>> 86 //create Decay Table
>> 87 G4DecayTable* table = new G4DecayTable();
>> 88
>> 89 // create decay channels
>> 90 G4VDecayChannel* mode;
>> 91 // tau- -> mu- + anti_nu_mu + nu_tau
>> 92 mode = new G4TauLeptonicDecayChannel("tau-",0.1736,"mu-");
>> 93 table->Insert(mode);
>> 94 // tau- -> e- + anti_nu_e + nu_tau
>> 95 mode = new G4TauLeptonicDecayChannel("tau-",0.1784,"e-");
>> 96 table->Insert(mode);
>> 97 // tau- -> pi- + nu_tau
>> 98 mode = new G4PhaseSpaceDecayChannel("tau-",0.1106,2,"pi-","nu_tau");
>> 99 table->Insert(mode);
>> 100 // tau- -> pi0 + pi- + nu_tau
>> 101 mode = new G4PhaseSpaceDecayChannel("tau-",0.2541,3,"pi0","pi-","nu_tau");
>> 102 table->Insert(mode);
>> 103 // tau- -> pi0 + pi0 + pi- + nu_tau
>> 104 mode = new G4PhaseSpaceDecayChannel();
>> 105 mode->SetParent("tau-");
>> 106 mode->SetBR(0.0917);
>> 107 mode->SetNumberOfDaughters(4);
>> 108 mode->SetDaughter(0,"pi0");
>> 109 mode->SetDaughter(1,"pi0");
>> 110 mode->SetDaughter(2,"pi-");
>> 111 mode->SetDaughter(3,"nu_tau");
>> 112 table->Insert(mode);
>> 113 // tau- -> pi- + pi- + pi+ + nu_tau
>> 114 mode = new G4PhaseSpaceDecayChannel();
>> 115 mode->SetParent("tau-");
>> 116 mode->SetBR(0.0946);
>> 117 mode->SetNumberOfDaughters(4);
>> 118 mode->SetDaughter(0,"pi-");
>> 119 mode->SetDaughter(1,"pi-");
>> 120 mode->SetDaughter(2,"pi+");
>> 121 mode->SetDaughter(3,"nu_tau");
>> 122 table->Insert(mode);
83 123
84 // create Decay Table << 124 anInstance->SetDecayTable(table);
85 auto table = new G4DecayTable(); <<
86 <<
87 // create decay channels <<
88 G4VDecayChannel* mode; <<
89 // tau- -> mu- + anti_nu_mu + nu_tau <<
90 mode = new G4TauLeptonicDecayChannel("tau- <<
91 table->Insert(mode); <<
92 // tau- -> e- + anti_nu_e + nu_tau <<
93 mode = new G4TauLeptonicDecayChannel("tau- <<
94 table->Insert(mode); <<
95 // tau- -> pi- + nu_tau <<
96 mode = new G4PhaseSpaceDecayChannel("tau-" <<
97 table->Insert(mode); <<
98 // tau- -> pi0 + pi- + nu_tau <<
99 mode = new G4PhaseSpaceDecayChannel("tau-" <<
100 table->Insert(mode); <<
101 // tau- -> pi0 + pi0 + pi- + nu_tau <<
102 mode = new G4PhaseSpaceDecayChannel(); <<
103 mode->SetParent("tau-"); <<
104 mode->SetBR(0.0917); <<
105 mode->SetNumberOfDaughters(4); <<
106 mode->SetDaughter(0, "pi0"); <<
107 mode->SetDaughter(1, "pi0"); <<
108 mode->SetDaughter(2, "pi-"); <<
109 mode->SetDaughter(3, "nu_tau"); <<
110 table->Insert(mode); <<
111 // tau- -> pi- + pi- + pi+ + nu_tau <<
112 mode = new G4PhaseSpaceDecayChannel(); <<
113 mode->SetParent("tau-"); <<
114 mode->SetBR(0.0946); <<
115 mode->SetNumberOfDaughters(4); <<
116 mode->SetDaughter(0, "pi-"); <<
117 mode->SetDaughter(1, "pi-"); <<
118 mode->SetDaughter(2, "pi+"); <<
119 mode->SetDaughter(3, "nu_tau"); <<
120 table->Insert(mode); <<
121 <<
122 anInstance->SetDecayTable(table); <<
123 } 125 }
124 theInstance = static_cast<G4TauMinus*>(anIns << 126 theInstance = reinterpret_cast<G4TauMinus*>(anInstance);
125 return theInstance; 127 return theInstance;
126 } 128 }
127 129
128 G4TauMinus* G4TauMinus::TauMinusDefinition() << 130 G4TauMinus* G4TauMinus::TauMinusDefinition()
129 { 131 {
130 return Definition(); 132 return Definition();
131 } 133 }
132 134
133 G4TauMinus* G4TauMinus::TauMinus() << 135 G4TauMinus* G4TauMinus::TauMinus()
134 { 136 {
135 return Definition(); 137 return Definition();
136 } 138 }
>> 139
>> 140
137 141