G4AntiSigmaZero.cc

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// 
// ----------------------------------------------------------------------
//      GEANT 4 class implementation file
//
//      History: first implementation, based on object model of
//      4th April 1996, G.Cosmo
// **********************************************************************
//  New impelemenataion as an utility class  M.Asai, 26 July 2004
// ----------------------------------------------------------------------
 
#include "G4AntiSigmaZero.hh"
#include "G4SystemOfUnits.hh"
#include "G4PhysicalConstants.hh"
#include "G4ParticleTable.hh"
 
#include "G4PhaseSpaceDecayChannel.hh"
#include "G4DecayTable.hh"
 
// ######################################################################
// ###                       AntiSigmaZero                            ###
// ######################################################################
 
G4AntiSigmaZero* G4AntiSigmaZero::theInstance = 0;
 
G4AntiSigmaZero* G4AntiSigmaZero::Definition()
{
  if (theInstance !=0) return theInstance;
  const G4String name = "anti_sigma0";
  // search in particle table]
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
  if (anInstance ==0) 
  {
  // create particle
  //
  //    Arguments for constructor are as follows
  //               name             mass          width         charge
  //             2*spin           parity  C-conjugation
  //          2*Isospin       2*Isospin3       G-parity   
  //               type    lepton number  baryon number   PDG encoding
  //             stable         lifetime    decay table
  //             shortlived      subType    anti_encoding
  
    anInstance = new G4ParticleDefinition(
                 name,    1.192642*GeV,    8.9e-3*MeV,          0.0,
                    1,              +1,             0,
                    2,               0,             0,
             "baryon",               0,            -1,        -3212,
                false,      7.4e-11*ns,          NULL,
                false,       "sigma");
 
    // Life time is given from width
    anInstance->SetPDGLifeTime( hbar_Planck/(anInstance->GetPDGWidth()) );
   
    //create Decay Table 
    G4DecayTable* table = new G4DecayTable();
    
    // create decay channels
    // anti_sigma0 -> anti_lambda + gamma
    G4VDecayChannel* mode  = new G4PhaseSpaceDecayChannel("anti_sigma0",1.000,2,"anti_lambda","gamma");
    
    table->Insert(mode); 
    
    anInstance->SetDecayTable(table);
  }
  theInstance = reinterpret_cast<G4AntiSigmaZero*>(anInstance);
  return theInstance;
}
 
G4AntiSigmaZero*  G4AntiSigmaZero::AntiSigmaZeroDefinition()
{
  return Definition();
}
 
G4AntiSigmaZero*  G4AntiSigmaZero::AntiSigmaZero()
{
  return Definition();
}