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24 // ******************************************* 21 // ********************************************************************
25 // 22 //
>> 23 //
>> 24 // $Id: G4PionZero.cc,v 1.13 2003/06/16 16:57:49 gunter Exp $
>> 25 // GEANT4 tag $Name: geant4-05-02-patch-01 $
>> 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 // ******************************************* 33 // **********************************************************************
32 // New impelemenataion as an utility class M << 34 // Added particle definitions, H.Kurashige, 19 April 1996
>> 35 // Operators (+=, *=, ++, -> etc.) correctly used, P. Urban, 26/6/96
>> 36 // Add PionZeroDefinition(), H.Kurashige 4 July 1996
33 // ------------------------------------------- 37 // ----------------------------------------------------------------------
34 38
>> 39 #include <fstream>
>> 40 #include <iomanip>
>> 41
35 #include "G4PionZero.hh" 42 #include "G4PionZero.hh"
36 43
>> 44
>> 45 #include "G4PhaseSpaceDecayChannel.hh"
37 #include "G4DalitzDecayChannel.hh" 46 #include "G4DalitzDecayChannel.hh"
38 #include "G4DecayTable.hh" 47 #include "G4DecayTable.hh"
39 #include "G4ParticleTable.hh" <<
40 #include "G4PhaseSpaceDecayChannel.hh" <<
41 #include "G4PhysicalConstants.hh" <<
42 #include "G4String.hh" <<
43 #include "G4SystemOfUnits.hh" <<
44 #include "G4VDecayChannel.hh" <<
45 48
46 G4PionZero* G4PionZero::theInstance = nullptr; << 49 // ######################################################################
47 << 50 // ### PIONZERO ###
48 G4PionZero* G4PionZero::Definition() << 51 // ######################################################################
>> 52
>> 53 G4PionZero::G4PionZero(
>> 54 const G4String& aName, G4double mass,
>> 55 G4double width, G4double charge,
>> 56 G4int iSpin, G4int iParity,
>> 57 G4int iConjugation, G4int iIsospin,
>> 58 G4int iIsospin3, G4int gParity,
>> 59 const G4String& pType, G4int lepton,
>> 60 G4int baryon, G4int encoding,
>> 61 G4bool stable, G4double lifetime,
>> 62 G4DecayTable *decaytable )
>> 63 : G4VMeson( aName,mass,width,charge,iSpin,iParity,
>> 64 iConjugation,iIsospin,iIsospin3,gParity,pType,
>> 65 lepton,baryon,encoding,stable,lifetime,decaytable )
49 { 66 {
50 if (theInstance != nullptr) return theInstan << 67 SetParticleSubType("pi");
51 const G4String name = "pi0"; << 68 // Anti-particle of Pi0 is pi0 itself
52 // search in particle table] << 69 SetAntiPDGEncoding(encoding);
53 G4ParticleTable* pTable = G4ParticleTable::G << 70
54 G4ParticleDefinition* anInstance = pTable->F << 71 SetPDGStable(false);
55 if (anInstance == nullptr) { << 72
56 // create particle << 73 //create Decay Table
57 // << 74 G4DecayTable* table = GetDecayTable();
58 // Arguments for constructor are as fol << 75 if (table!=NULL) delete table;
59 // name mass << 76 table = new G4DecayTable();
60 // 2*spin parity C- << 77
61 // 2*Isospin 2*Isospin3 << 78 // create a decay channel
62 // type lepton number ba << 79 G4VDecayChannel* mode;
63 // stable lifetime << 80 // pi0 -> gamma + gamma
64 // shortlived subType << 81 mode = new G4PhaseSpaceDecayChannel("pi0",0.988,2,"gamma","gamma");
65 << 82 table->Insert(mode);
66 // clang-format off << 83 // pi0 -> gamma + e+ + e-
67 anInstance = new G4ParticleDefinition( << 84 mode = new G4DalitzDecayChannel("pi0",0.012,"e-","e+");
68 name, 0.1349766*GeV, 7.73e << 85 table->Insert(mode);
69 0, -1, <<
70 2, 0, <<
71 "meson", 0, <<
72 false, 8.52e-8*ns, <<
73 false, "pi", <<
74 // clang-format on <<
75 <<
76 // Life time is given from width <<
77 anInstance->SetPDGLifeTime(hbar_Planck / ( <<
78 <<
79 // create Decay Table <<
80 auto table = new G4DecayTable(); <<
81 <<
82 // create a decay channel <<
83 G4VDecayChannel* mode; <<
84 // pi0 -> gamma + gamma <<
85 mode = new G4PhaseSpaceDecayChannel("pi0", <<
86 table->Insert(mode); <<
87 // pi0 -> gamma + e+ + e- <<
88 mode = new G4DalitzDecayChannel("pi0", 0.0 <<
89 table->Insert(mode); <<
90 <<
91 anInstance->SetDecayTable(table); <<
92 } <<
93 theInstance = static_cast<G4PionZero*>(anIns <<
94 return theInstance; <<
95 } <<
96 86
97 G4PionZero* G4PionZero::PionZeroDefinition() << 87 SetDecayTable(table);
98 { <<
99 return Definition(); <<
100 } 88 }
101 89
102 G4PionZero* G4PionZero::PionZero() << 90 // ......................................................................
103 { << 91 // ... static member definitions ...
104 return Definition(); << 92 // ......................................................................
105 } << 93 //
>> 94 // Arguments for constructor are as follows
>> 95 // name mass width charge
>> 96 // 2*spin parity C-conjugation
>> 97 // 2*Isospin 2*Isospin3 G-parity
>> 98 // type lepton number baryon number PDG encoding
>> 99 // stable lifetime decay table
>> 100
>> 101 G4PionZero G4PionZero::thePionZero(
>> 102 "pi0", 0.1349764*GeV, 7.8e-06*MeV, 0.0,
>> 103 0, -1, +1,
>> 104 2, 0, -1,
>> 105 "meson", 0, 0, 111,
>> 106 false, 8.4e-8*ns, NULL
>> 107 );
>> 108
>> 109 G4PionZero* G4PionZero::PionZeroDefinition(){return &thePionZero;}
>> 110
>> 111 G4PionZero* G4PionZero::PionZero(){return &thePionZero;}
>> 112
>> 113
106 114