G4AntiProton.cc

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//
// ----------------------------------------------------------------------
//      GEANT 4 class implementation file
//
//      History: first implementation, based on object model of
//      4th April 1996, G.Cosmo
//                          H.Kurashige 7 July 1996
// **********************************************************************
//  New impelemenataion as an utility class  M.Asai, 26 July 2004
// ----------------------------------------------------------------
 
#include "G4AntiProton.hh"
 
#include "G4ParticleTable.hh"
#include "G4PhysicalConstants.hh"
#include "G4String.hh"
#include "G4SystemOfUnits.hh"
#include "G4Types.hh"
 
G4AntiProton* G4AntiProton::theInstance = nullptr;
 
G4AntiProton* G4AntiProton::Definition()
{
  if (theInstance != nullptr) return theInstance;
  const G4String name = "anti_proton";
  // 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
    // use constants in CLHEP
    //  static const double   proton_mass_c2 = 938.27231 * MeV;
 
    // clang-format off
   anInstance = new G4ParticleDefinition(
                 name,  proton_mass_c2,       0.0*MeV,  -1.0*eplus, 
            1,              +1,             0,         
            1,              -1,             0,             
         "baryon",               0,            -1,       -2212,
         true,            -1.0,          nullptr,
         false,      "nucleon",          2212
              );
    // clang-format on
 
    // Magnetic Moment
    G4double mN = eplus * hbar_Planck / 2. / (proton_mass_c2 / c_squared);
    anInstance->SetPDGMagneticMoment(-2.792847351 * mN);
  }
  theInstance = static_cast<G4AntiProton*>(anInstance);
  return theInstance;
}
 
G4AntiProton* G4AntiProton::AntiProtonDefinition()
{
  return Definition();
}
 
G4AntiProton* G4AntiProton::AntiProton()
{
  return Definition();
}