| Geant4 Cross Reference |
1 // 1 //
2 // ******************************************* 2 // ********************************************************************
3 // * License and Disclaimer << 3 // * DISCLAIMER *
4 // * 4 // * *
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15 // * use. Please see the license in the file << 14 // * use. *
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17 // * 15 // * *
18 // * This code implementation is the result << 16 // * This code implementation is the intellectual property of the *
19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. *
20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work *
21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this *
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23 // * acceptance of all terms of the Geant4 Sof <<
24 // ******************************************* 21 // ********************************************************************
25 // 22 //
>> 23 //
>> 24 // $Id: G4TauPlus.cc,v 1.7 2001/10/16 08:16:19 kurasige Exp $
>> 25 // GEANT4 tag $Name: geant4-04-00 $
>> 26 //
>> 27 //
26 // ------------------------------------------- 28 // ----------------------------------------------------------------------
27 // GEANT 4 class implementation file 29 // GEANT 4 class implementation file
28 // 30 //
29 // History: first implementation, based o 31 // History: first implementation, based on object model of
30 // 4th April 1996, G.Cosmo 32 // 4th April 1996, G.Cosmo
31 // 7 July 1996 H.Kurash << 33 // 7 July 1996 H.Kurashige
32 // ******************************************* 34 // **********************************************************************
33 // New impelemenataion as an utility class M << 35
34 // ------------------------------------------- << 36 #include "g4std/fstream"
>> 37 #include "g4std/iomanip"
35 38
36 #include "G4TauPlus.hh" 39 #include "G4TauPlus.hh"
37 40
38 #include "G4DecayTable.hh" <<
39 #include "G4ParticleTable.hh" <<
40 #include "G4PhaseSpaceDecayChannel.hh" 41 #include "G4PhaseSpaceDecayChannel.hh"
41 #include "G4PhysicalConstants.hh" << 42 #include "G4DecayTable.hh"
42 #include "G4String.hh" <<
43 #include "G4SystemOfUnits.hh" <<
44 #include "G4TauLeptonicDecayChannel.hh" <<
45 #include "G4Types.hh" <<
46 #include "G4VDecayChannel.hh" <<
47 <<
48 G4TauPlus* G4TauPlus::theInstance = nullptr; <<
49 43
50 G4TauPlus* G4TauPlus::Definition() << 44 // ######################################################################
>> 45 // ### TAPLUS ###
>> 46 // ######################################################################
>> 47
>> 48 G4TauPlus::G4TauPlus(
>> 49 const G4String& aName, G4double mass,
>> 50 G4double width, G4double charge,
>> 51 G4int iSpin, G4int iParity,
>> 52 G4int iConjugation, G4int iIsospin,
>> 53 G4int iIsospin3, G4int gParity,
>> 54 const G4String& pType, G4int lepton,
>> 55 G4int baryon, G4int encoding,
>> 56 G4bool stable, G4double lifetime,
>> 57 G4DecayTable *decaytable )
>> 58 : G4VLepton( aName,mass,width,charge,iSpin,iParity,
>> 59 iConjugation,iIsospin,iIsospin3,gParity,pType,
>> 60 lepton,baryon,encoding,stable,lifetime,decaytable )
51 { 61 {
52 if (theInstance != nullptr) return theInstan << 62 SetParticleSubType("tau");
53 const G4String name = "tau+"; << 63 SetPDGStable(false);
54 // search in particle table] << 64
55 G4ParticleTable* pTable = G4ParticleTable::G << 65 //create Decay Table
56 G4ParticleDefinition* anInstance = pTable->F << 66 G4DecayTable* table = GetDecayTable();
57 if (anInstance == nullptr) { << 67 if (table!=NULL) delete table;
58 // create particle << 68 table = new G4DecayTable();
59 // << 69
60 // Arguments for constructor are as fol << 70 // create decay channels
61 // name mass << 71 G4VDecayChannel** mode = new G4VDecayChannel*[6];
62 // 2*spin parity C- << 72 // tau+ -> mu+ + nu_mu + anti_nu_tau
63 // 2*Isospin 2*Isospin3 << 73 mode[0] = new G4PhaseSpaceDecayChannel("tau+",0.174,3,"mu+","nu_mu","anti_nu_tau");
64 // type lepton number ba << 74 // tau+ -> e+ + nu_e + anti_nu_tau
65 // stable lifetime << 75 mode[1] = new G4PhaseSpaceDecayChannel("tau+",0.178,3,"e+","nu_e","anti_nu_tau");
66 // shortlived subType << 76 // tau+ -> pi+ + anti_nu_tau
67 << 77 mode[2] = new G4PhaseSpaceDecayChannel("tau+",0.113,2,"pi+","anti_nu_tau");
68 // clang-format off << 78 // tau+ -> pi0 + pi0 + pi+ + anti_nu_tau
69 anInstance = new G4ParticleDefinition( << 79 mode[3] = new G4PhaseSpaceDecayChannel("tau+",0.252,3,"pi0","pi+","anti_nu_tau");
70 name, 1.77686*GeV, 2.267 << 80 // tau+ -> pi0 + pi0 + pi+ + anti_nu_tau
>> 81 mode[4] = new G4PhaseSpaceDecayChannel();
>> 82 mode[4]->SetParent("tau+");
>> 83 mode[4]->SetBR(0.093);
>> 84 mode[4]->SetNumberOfDaughters(4);
>> 85 mode[4]->SetDaughter(0,"pi0");
>> 86 mode[4]->SetDaughter(1,"pi0");
>> 87 mode[4]->SetDaughter(2,"pi+");
>> 88 mode[4]->SetDaughter(3,"anti_nu_tau");
>> 89 // tau+ -> pi+ + pi+ + pi- + anti_nu_tau
>> 90 mode[5] = new G4PhaseSpaceDecayChannel();
>> 91 mode[5]->SetParent("tau+");
>> 92 mode[5]->SetBR(0.098);
>> 93 mode[5]->SetNumberOfDaughters(4);
>> 94 mode[5]->SetDaughter(0,"pi+");
>> 95 mode[5]->SetDaughter(1,"pi+");
>> 96 mode[5]->SetDaughter(2,"pi-");
>> 97 mode[5]->SetDaughter(3,"anti_nu_tau");
>> 98
>> 99 for (G4int index=0; index <6; index++ ) table->Insert(mode[index]);
>> 100
>> 101 delete [] mode;
>> 102
>> 103 SetDecayTable(table);
>> 104 }
>> 105
>> 106 // ......................................................................
>> 107 // ... static member definitions ...
>> 108 // ......................................................................
>> 109 //
>> 110 // Arguments for constructor are as follows
>> 111 // name mass width charge
>> 112 // 2*spin parity C-conjugation
>> 113 // 2*Isospin 2*Isospin3 G-parity
>> 114 // type lepton number baryon number PDG encoding
>> 115 // stable lifetime decay table
>> 116 //
>> 117 G4TauPlus G4TauPlus::theTauPlus(
>> 118 "tau+", 1.77705*GeV, 2.27e-9*MeV, 1.*eplus,
71 1, 0, 0, 119 1, 0, 0,
72 0, 0, 0, 120 0, 0, 0,
73 "lepton", -1, 121 "lepton", -1, 0, -15,
74 false, 290.3e-6*ns, nullptr, << 122 true, 295.6e-6*ns, NULL
75 false, "tau" << 123 );
76 ); <<
77 // clang-format on <<
78 <<
79 // Bohr Magnetron <<
80 G4double muB = 0.5 * eplus * hbar_Planck / <<
81 <<
82 anInstance->SetPDGMagneticMoment(muB * 1.0 <<
83 <<
84 // create Decay Table <<
85 auto table = new G4DecayTable(); <<
86 <<
87 // create decay channels <<
88 G4VDecayChannel* mode; <<
89 // tau+ -> mu+ + nu_mu + anti_nu_tau <<
90 mode = new G4TauLeptonicDecayChannel("tau+ <<
91 table->Insert(mode); <<
92 // tau+ -> e+ + nu_e + anti_nu_tau <<
93 mode = new G4TauLeptonicDecayChannel("tau+ <<
94 table->Insert(mode); <<
95 // tau+ -> pi+ + anti_nu_tau <<
96 mode = new G4PhaseSpaceDecayChannel("tau+" <<
97 table->Insert(mode); <<
98 // tau+ -> pi0 + pi0 + pi+ + anti_nu_tau <<
99 mode = new G4PhaseSpaceDecayChannel("tau+" <<
100 table->Insert(mode); <<
101 // tau+ -> pi0 + pi0 + pi+ + anti_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, "anti_nu_tau"); <<
110 table->Insert(mode); <<
111 // tau+ -> pi+ + pi+ + pi- + anti_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, "anti_nu_tau"); <<
120 table->Insert(mode); <<
121 <<
122 anInstance->SetDecayTable(table); <<
123 } <<
124 theInstance = static_cast<G4TauPlus*>(anInst <<
125 return theInstance; <<
126 } <<
127 124
128 G4TauPlus* G4TauPlus::TauPlusDefinition() << 125 G4TauPlus* G4TauPlus::TauPlusDefinition(){return &theTauPlus;}
129 { <<
130 return Definition(); <<
131 } <<
132 126
133 G4TauPlus* G4TauPlus::TauPlus() << 127 G4TauPlus* G4TauPlus::TauPlus()
134 { << 128 {
135 return Definition(); << 129 return &theTauPlus;
136 } 130 }
>> 131
137 132