G4AntiOmegaMinus.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 "G4AntiOmegaMinus.hh"
 
#include "G4DecayTable.hh"
#include "G4ParticleTable.hh"
#include "G4PhaseSpaceDecayChannel.hh"
#include "G4PhysicalConstants.hh"
#include "G4String.hh"
#include "G4SystemOfUnits.hh"
#include "G4Types.hh"
#include "G4VDecayChannel.hh"
 
G4AntiOmegaMinus* G4AntiOmegaMinus::theInstance = nullptr;
 
G4AntiOmegaMinus* G4AntiOmegaMinus::Definition()
{
  if (theInstance != nullptr) return theInstance;
  const G4String name = "anti_omega-";
  // search in particle table
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* anInstance = pTable->FindParticle(name);
  if (anInstance == nullptr) {
    // 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
 
    // clang-format off
    anInstance = new G4ParticleDefinition(
                 name,     1.67245*GeV,  8.07e-12*MeV,       eplus,
                    3,              +1,             0,
                    0,               0,             0,
             "baryon",               0,            -1,       -3334,
                false,       0.0821*ns,          nullptr,
                false,       "omega");
    // clang-format on
 
    // Magnetic Moment
    G4double mN = eplus * hbar_Planck / 2. / (proton_mass_c2 / c_squared);
    anInstance->SetPDGMagneticMoment(-2.02 * mN);
 
    // create Decay Table
    auto table = new G4DecayTable();
 
    // create decay channels
    auto mode = new G4VDecayChannel*[3];
    // anti_omega- -> anti_lambda + kaon+
    mode[0] = new G4PhaseSpaceDecayChannel("anti_omega-", 0.678, 2, "anti_lambda", "kaon+");
    // anti_omega- -> anti_xi0 + pi+
    mode[1] = new G4PhaseSpaceDecayChannel("anti_omega-", 0.236, 2, "anti_xi0", "pi+");
    // anti_omega- -> anti_xi- + pi0
    mode[2] = new G4PhaseSpaceDecayChannel("anti_omega-", 0.086, 2, "anti_xi-", "pi0");
 
    for (G4int index = 0; index < 3; index++)
      table->Insert(mode[index]);
    delete[] mode;
 
    anInstance->SetDecayTable(table);
  }
  theInstance = static_cast<G4AntiOmegaMinus*>(anInstance);
  return theInstance;
}
 
G4AntiOmegaMinus* G4AntiOmegaMinus::AntiOmegaMinusDefinition()
{
  return Definition();
}
 
G4AntiOmegaMinus* G4AntiOmegaMinus::AntiOmegaMinus()
{
  return Definition();
}