Geant4  9.6.p02
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G4EtaPrime.cc
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26 //
27 // $Id$
28 //
29 //
30 // ----------------------------------------------------------------
31 // GEANT 4 class implementation file
32 //
33 // History: first implementation, 8 June 1998 Hisaya Kurashige
34 // **********************************************************************
35 // New impelemenataion as an utility class M.Asai, 26 July 2004
36 // ----------------------------------------------------------------------
37 // Update mass (PDG2006) Oct. 11 2006 H.Kurashige
38 //
39 
40 #include "G4EtaPrime.hh"
41 #include "G4SystemOfUnits.hh"
42 #include "G4ParticleTable.hh"
43 
45 #include "G4DecayTable.hh"
46 
47 // ######################################################################
48 // ### EtaPrime ###
49 // ######################################################################
50 
51 G4EtaPrime* G4EtaPrime::theInstance = 0;
52 
54 {
55  if (theInstance !=0) return theInstance;
56  const G4String name = "eta_prime";
57  // search in particle table]
59  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
60  if (anInstance ==0)
61  {
62  // create particle
63  //
64  // Arguments for constructor are as follows
65  // name mass width charge
66  // 2*spin parity C-conjugation
67  // 2*Isospin 2*Isospin3 G-parity
68  // type lepton number baryon number PDG encoding
69  // stable lifetime decay table
70  // shortlived subType anti_encoding
71 
72  anInstance = new G4ParticleDefinition(
73  name, 0.95778*GeV, 0.199*MeV, 0.0,
74  0, -1, +1,
75  0, 0, +1,
76  "meson", 0, 0, 331,
77  false, 0.0*ns, NULL,
78  false, "eta_prime", 331);
79  //create Decay Table
80  G4DecayTable* table = new G4DecayTable();
81 
82  // create decay channels
83  G4VDecayChannel** mode = new G4VDecayChannel*[3];
84  // EtaPrime -> eta + pi+ + pi-
85  mode[0] = new G4PhaseSpaceDecayChannel("eta_prime",0.437,3,"eta","pi+","pi-");
86  // EtaPrime -> eta + pi0 + pi0
87  mode[1] = new G4PhaseSpaceDecayChannel("eta_prime",0.208,3,"eta","pi0","pi0");
88  // EtaPrime -> rho0 + gamma
89  mode[2] = new G4PhaseSpaceDecayChannel("eta_prime",0.302,2,"rho0","gamma");
90 
91  for (G4int index=0; index <3; index++ ) table->Insert(mode[index]);
92  delete [] mode;
93 
94  anInstance->SetDecayTable(table);
95  }
96  theInstance = reinterpret_cast<G4EtaPrime*>(anInstance);
97  return theInstance;
98 }
99 
101 {
102  return Definition();
103 }
104 
106 {
107  return Definition();
108 }
109