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1 // 1 //
2 // ******************************************* 2 // ********************************************************************
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4 // * 4 // * *
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15 // * use. Please see the license in the file << 14 // * use. *
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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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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
>> 23 //
>> 24 // $Id: G4TauMinus.cc,v 1.8 2002/03/08 08:48:31 kurasige Exp $
>> 25 // GEANT4 tag $Name: geant4-05-00 $
>> 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 "G4TauMinus.hh" 39 #include "G4TauMinus.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 "G4String.hh" <<
43 #include "G4SystemOfUnits.hh" <<
44 #include "G4TauLeptonicDecayChannel.hh" 42 #include "G4TauLeptonicDecayChannel.hh"
45 #include "G4Types.hh" << 43 #include "G4DecayTable.hh"
46 #include "G4VDecayChannel.hh" <<
47 <<
48 G4TauMinus* G4TauMinus::theInstance = nullptr; <<
49 44
50 G4TauMinus* G4TauMinus::Definition() << 45 // ######################################################################
>> 46 // ### TAUMINUS ###
>> 47 // ######################################################################
>> 48
>> 49 G4TauMinus::G4TauMinus(
>> 50 const G4String& aName, G4double mass,
>> 51 G4double width, G4double charge,
>> 52 G4int iSpin, G4int iParity,
>> 53 G4int iConjugation, G4int iIsospin,
>> 54 G4int iIsospin3, G4int gParity,
>> 55 const G4String& pType, G4int lepton,
>> 56 G4int baryon, G4int encoding,
>> 57 G4bool stable, G4double lifetime,
>> 58 G4DecayTable *decaytable )
>> 59 : G4VLepton( aName,mass,width,charge,iSpin,iParity,
>> 60 iConjugation,iIsospin,iIsospin3,gParity,pType,
>> 61 lepton,baryon,encoding,stable,lifetime,decaytable )
51 { 62 {
52 if (theInstance != nullptr) return theInstan << 63 SetParticleSubType("tau");
53 const G4String name = "tau-"; << 64 SetPDGStable(false);
54 // search in particle table] << 65
55 G4ParticleTable* pTable = G4ParticleTable::G << 66 //create Decay Table
56 G4ParticleDefinition* anInstance = pTable->F << 67 G4DecayTable* table = GetDecayTable();
57 if (anInstance == nullptr) { << 68 if (table!=NULL) delete table;
58 // create particle << 69 table = new G4DecayTable();
59 // << 70
60 // Arguments for constructor are as fol << 71 // create decay channels
61 // name mass << 72 G4VDecayChannel** mode = new G4VDecayChannel*[6];
62 // 2*spin parity C- << 73 // tau- -> mu- + anti_nu_mu + nu_tau
63 // 2*Isospin 2*Isospin3 << 74 mode[0] = new G4TauLeptonicDecayChannel("tau-",0.174,"mu-");
64 // type lepton number ba << 75 // tau- -> e- + anti_nu_e + nu_tau
65 // stable lifetime << 76 mode[1] = new G4TauLeptonicDecayChannel("tau-",0.178,"e-");
66 // shortlived subType << 77 // tau- -> pi- + nu_tau
67 << 78 mode[2] = new G4PhaseSpaceDecayChannel("tau-",0.113,2,"pi-","nu_tau");
68 // clang-format off << 79 // tau- -> pi0 + pi0 + pi- + nu_tau
69 anInstance = new G4ParticleDefinition( << 80 mode[3] = new G4PhaseSpaceDecayChannel("tau-",0.252,3,"pi0","pi-","nu_tau");
70 name, 1.77686*GeV, 2.267 << 81 // tau- -> pi0 + pi0 + pi- + nu_tau
>> 82 mode[4] = new G4PhaseSpaceDecayChannel();
>> 83 mode[4]->SetParent("tau-");
>> 84 mode[4]->SetBR(0.093);
>> 85 mode[4]->SetNumberOfDaughters(4);
>> 86 mode[4]->SetDaughter(0,"pi0");
>> 87 mode[4]->SetDaughter(1,"pi0");
>> 88 mode[4]->SetDaughter(2,"pi-");
>> 89 mode[4]->SetDaughter(3,"nu_tau");
>> 90 // tau- -> pi- + pi- + pi+ + nu_tau
>> 91 mode[5] = new G4PhaseSpaceDecayChannel();
>> 92 mode[5]->SetParent("tau-");
>> 93 mode[5]->SetBR(0.098);
>> 94 mode[5]->SetNumberOfDaughters(4);
>> 95 mode[5]->SetDaughter(0,"pi-");
>> 96 mode[5]->SetDaughter(1,"pi-");
>> 97 mode[5]->SetDaughter(2,"pi+");
>> 98 mode[5]->SetDaughter(3,"nu_tau");
>> 99
>> 100 for (G4int index=0; index <6; index++ ) table->Insert(mode[index]);
>> 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 G4TauMinus G4TauMinus::theTauMinus(
>> 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- + 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 theInstance = static_cast<G4TauMinus*>(anIns <<
125 return theInstance; <<
126 } <<
127 124
128 G4TauMinus* G4TauMinus::TauMinusDefinition() << 125 G4TauMinus* G4TauMinus::TauMinusDefinition() {return &theTauMinus;}
129 { <<
130 return Definition(); <<
131 } <<
132 126
133 G4TauMinus* G4TauMinus::TauMinus() << 127 G4TauMinus* G4TauMinus::TauMinus()
134 { << 128 {
135 return Definition(); << 129 return &theTauMinus;
136 } 130 }
>> 131
>> 132
137 133