G4AntiSigmaZero.cc

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00001 //
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00025 //
00026 //
00027 // $Id$
00028 //
00029 // 
00030 // ----------------------------------------------------------------------
00031 //      GEANT 4 class implementation file
00032 //
00033 //      History: first implementation, based on object model of
00034 //      4th April 1996, G.Cosmo
00035 // **********************************************************************
00036 //  New impelemenataion as an utility class  M.Asai, 26 July 2004
00037 // ----------------------------------------------------------------------
00038 
00039 #include "G4AntiSigmaZero.hh"
00040 #include "G4SystemOfUnits.hh"
00041 #include "G4ParticleTable.hh"
00042 
00043 #include "G4PhaseSpaceDecayChannel.hh"
00044 #include "G4DecayTable.hh"
00045 
00046 // ######################################################################
00047 // ###                       AntiSigmaZero                            ###
00048 // ######################################################################
00049 
00050 G4AntiSigmaZero* G4AntiSigmaZero::theInstance = 0;
00051 
00052 G4AntiSigmaZero* G4AntiSigmaZero::Definition()
00053 {
00054   if (theInstance !=0) return theInstance;
00055   const G4String name = "anti_sigma0";
00056   // search in particle table]
00057   G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
00058   G4ParticleDefinition* anInstance = pTable->FindParticle(name);
00059   if (anInstance ==0) 
00060   {
00061   // create particle
00062   //
00063   //    Arguments for constructor are as follows
00064   //               name             mass          width         charge
00065   //             2*spin           parity  C-conjugation
00066   //          2*Isospin       2*Isospin3       G-parity   
00067   //               type    lepton number  baryon number   PDG encoding
00068   //             stable         lifetime    decay table
00069   //             shortlived      subType    anti_encoding
00070   
00071     anInstance = new G4ParticleDefinition(
00072                  name,    1.192642*GeV,    8.9e-3*MeV,          0.0,
00073                     1,              +1,             0,
00074                     2,               0,             0,
00075              "baryon",               0,            -1,        -3212,
00076                 false,      7.4e-11*ns,          NULL,
00077                 false,       "sigma");
00078  
00079     //create Decay Table 
00080     G4DecayTable* table = new G4DecayTable();
00081     
00082     // create decay channels
00083     // anti_sigma0 -> anti_lambda + gamma
00084     G4VDecayChannel* mode  = new G4PhaseSpaceDecayChannel("anti_sigma0",1.000,2,"anti_lambda","gamma");
00085     
00086     table->Insert(mode); 
00087     
00088     anInstance->SetDecayTable(table);
00089   }
00090   theInstance = reinterpret_cast<G4AntiSigmaZero*>(anInstance);
00091   return theInstance;
00092 }
00093 
00094 G4AntiSigmaZero*  G4AntiSigmaZero::AntiSigmaZeroDefinition()
00095 {
00096   return Definition();
00097 }
00098 
00099 G4AntiSigmaZero*  G4AntiSigmaZero::AntiSigmaZero()
00100 {
00101   return Definition();
00102 }
00103 

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