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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer 3 // * License and Disclaimer *
4 // * 4 // * *
5 // * The Geant4 software is copyright of th 5 // * The Geant4 software is copyright of the Copyright Holders of *
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7 // * conditions of the Geant4 Software License 7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/ 8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. 9 // * include a list of copyright holders. *
10 // * 10 // * *
11 // * Neither the authors of this software syst 11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing fin 12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warran 13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assum 14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file 15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitatio 16 // * for the full disclaimer and the limitation of liability. *
17 // * 17 // * *
18 // * This code implementation is the result 18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboratio 19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distri 20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you ag 21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publicati 22 // * use in resulting scientific publications, and indicate your *
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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
>> 26 //
>> 27 //
>> 28 //
26 // ------------------------------------------- 29 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 30 // GEANT 4 class implementation file
28 // 31 //
29 // History: first implementation, based o 32 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 33 // 4th April 1996, G.Cosmo
31 // 7 July 1996 H.Kurash << 34 // 7 July 1996 H.Kurashige
32 // ******************************************* 35 // **********************************************************************
33 // New impelemenataion as an utility class M 36 // New impelemenataion as an utility class M.Asai, 26 July 2004
34 // ------------------------------------------- 37 // ----------------------------------------------------------------------
35 38
36 #include "G4TauMinus.hh" 39 #include "G4TauMinus.hh"
37 <<
38 #include "G4DecayTable.hh" <<
39 #include "G4ParticleTable.hh" <<
40 #include "G4PhaseSpaceDecayChannel.hh" <<
41 #include "G4PhysicalConstants.hh" 40 #include "G4PhysicalConstants.hh"
42 #include "G4String.hh" <<
43 #include "G4SystemOfUnits.hh" 41 #include "G4SystemOfUnits.hh"
>> 42 #include "G4ParticleTable.hh"
>> 43
>> 44 #include "G4PhaseSpaceDecayChannel.hh"
44 #include "G4TauLeptonicDecayChannel.hh" 45 #include "G4TauLeptonicDecayChannel.hh"
45 #include "G4Types.hh" << 46 #include "G4DecayTable.hh"
46 #include "G4VDecayChannel.hh" <<
47 47
48 G4TauMinus* G4TauMinus::theInstance = nullptr; << 48 // ######################################################################
>> 49 // ### TAUMINUS ###
>> 50 // ######################################################################
>> 51 G4TauMinus* G4TauMinus::theInstance = 0;
49 52
50 G4TauMinus* G4TauMinus::Definition() 53 G4TauMinus* G4TauMinus::Definition()
51 { 54 {
52 if (theInstance != nullptr) return theInstan << 55 if (theInstance !=0) return theInstance;
53 const G4String name = "tau-"; 56 const G4String name = "tau-";
54 // search in particle table] 57 // search in particle table]
55 G4ParticleTable* pTable = G4ParticleTable::G 58 G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
56 G4ParticleDefinition* anInstance = pTable->F 59 G4ParticleDefinition* anInstance = pTable->FindParticle(name);
57 if (anInstance == nullptr) { << 60 if (anInstance ==0)
58 // create particle << 61 {
59 // << 62 // create particle
60 // Arguments for constructor are as fol << 63 //
61 // name mass << 64 // Arguments for constructor are as follows
62 // 2*spin parity C- << 65 // name mass width charge
63 // 2*Isospin 2*Isospin3 << 66 // 2*spin parity C-conjugation
64 // type lepton number ba << 67 // 2*Isospin 2*Isospin3 G-parity
65 // stable lifetime << 68 // type lepton number baryon number PDG encoding
66 // shortlived subType << 69 // stable lifetime decay table
67 << 70 // shortlived subType anti_encoding
68 // clang-format off <<
69 anInstance = new G4ParticleDefinition( 71 anInstance = new G4ParticleDefinition(
70 name, 1.77686*GeV, 2.267 72 name, 1.77686*GeV, 2.267e-9*MeV, -1.*eplus,
71 1, 0, 0, 73 1, 0, 0,
72 0, 0, 0, 74 0, 0, 0,
73 "lepton", 1, 75 "lepton", 1, 0, 15,
74 false, 290.3e-6*ns, nullptr, << 76 false, 290.3e-6*ns, NULL,
75 false, "tau" 77 false, "tau"
76 ); 78 );
77 // clang-format on <<
78 <<
79 // Bohr Magnetron <<
80 G4double muB = -0.5 * eplus * hbar_Planck <<
81 79
82 anInstance->SetPDGMagneticMoment(muB * 1.0 << 80 // Bohr Magnetron
>> 81 G4double muB = -0.5*eplus*hbar_Planck/(anInstance->GetPDGMass()/c_squared) ;
>> 82
>> 83 anInstance->SetPDGMagneticMoment( muB * 1.00118);
>> 84
>> 85 //create Decay Table
>> 86 G4DecayTable* table = new G4DecayTable();
>> 87
>> 88 // create decay channels
>> 89 G4VDecayChannel* mode;
>> 90 // tau- -> mu- + anti_nu_mu + nu_tau
>> 91 mode = new G4TauLeptonicDecayChannel("tau-",0.1736,"mu-");
>> 92 table->Insert(mode);
>> 93 // tau- -> e- + anti_nu_e + nu_tau
>> 94 mode = new G4TauLeptonicDecayChannel("tau-",0.1784,"e-");
>> 95 table->Insert(mode);
>> 96 // tau- -> pi- + nu_tau
>> 97 mode = new G4PhaseSpaceDecayChannel("tau-",0.1106,2,"pi-","nu_tau");
>> 98 table->Insert(mode);
>> 99 // tau- -> pi0 + pi- + nu_tau
>> 100 mode = new G4PhaseSpaceDecayChannel("tau-",0.2541,3,"pi0","pi-","nu_tau");
>> 101 table->Insert(mode);
>> 102 // tau- -> pi0 + pi0 + pi- + nu_tau
>> 103 mode = new G4PhaseSpaceDecayChannel();
>> 104 mode->SetParent("tau-");
>> 105 mode->SetBR(0.0917);
>> 106 mode->SetNumberOfDaughters(4);
>> 107 mode->SetDaughter(0,"pi0");
>> 108 mode->SetDaughter(1,"pi0");
>> 109 mode->SetDaughter(2,"pi-");
>> 110 mode->SetDaughter(3,"nu_tau");
>> 111 table->Insert(mode);
>> 112 // tau- -> pi- + pi- + pi+ + nu_tau
>> 113 mode = new G4PhaseSpaceDecayChannel();
>> 114 mode->SetParent("tau-");
>> 115 mode->SetBR(0.0946);
>> 116 mode->SetNumberOfDaughters(4);
>> 117 mode->SetDaughter(0,"pi-");
>> 118 mode->SetDaughter(1,"pi-");
>> 119 mode->SetDaughter(2,"pi+");
>> 120 mode->SetDaughter(3,"nu_tau");
>> 121 table->Insert(mode);
83 122
84 // create Decay Table << 123 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 } 124 }
124 theInstance = static_cast<G4TauMinus*>(anIns << 125 theInstance = reinterpret_cast<G4TauMinus*>(anInstance);
125 return theInstance; 126 return theInstance;
126 } 127 }
127 128
128 G4TauMinus* G4TauMinus::TauMinusDefinition() << 129 G4TauMinus* G4TauMinus::TauMinusDefinition()
129 { 130 {
130 return Definition(); 131 return Definition();
131 } 132 }
132 133
133 G4TauMinus* G4TauMinus::TauMinus() << 134 G4TauMinus* G4TauMinus::TauMinus()
134 { 135 {
135 return Definition(); 136 return Definition();
136 } 137 }
>> 138
>> 139
137 140