G4AntiDoubleHyperDoubleNeutron.cc

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// Author:       2021 Alberto Ribon
//
//----------------------------------------------------------------------------
 
#include "G4AntiDoubleHyperDoubleNeutron.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"
 
G4AntiDoubleHyperDoubleNeutron* G4AntiDoubleHyperDoubleNeutron::theInstance = nullptr;
 
G4AntiDoubleHyperDoubleNeutron* G4AntiDoubleHyperDoubleNeutron::Definition()
{
  if (theInstance != nullptr) return theInstance;
  const G4String name = "anti_doublehyperdoubleneutron";
  // search in particle table
  G4ParticleTable* pTable = G4ParticleTable::GetParticleTable();
  auto anInstance = static_cast<G4Ions*>(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
    //                      excitation
 
    // clang-format off
    anInstance = new G4Ions(      name,     4110.24*MeV, 2.501e-12*MeV,    0.0*eplus,
                                     0,              +1,             0,
                                     0,               0,             0,
                        "anti_nucleus",               0,            -4,  -1020000040,
                                 false,       0.2631*ns,       nullptr,
                         false,        "static",    1020000040, 
                           0.0,                0                             );
    // clang-format on
 
    // Magnetic Moment
    G4double mN = eplus * hbar_Planck / 2.0 / (proton_mass_c2 / c_squared);
    anInstance->SetPDGMagneticMoment(2.97896248 * mN);
 
    // create Decay Table
    auto table = new G4DecayTable;
    // create decay channels
    const G4double half_br_lambda_to_p_pim = 0.5 * 0.639;
    const G4double br_lambda_to_n_piz = 0.358;
    auto mode = new G4VDecayChannel*[3];
    // anti_lambda -> anti_proton + pi+ , with 50% probability of capturing the anti_proton
    mode[0] = new G4PhaseSpaceDecayChannel("anti_doublehyperdoubleneutron", half_br_lambda_to_p_pim,
                                           5, "anti_neutron", "anti_neutron", "anti_lambda",
                                           "anti_proton", "pi+");
    mode[1] = new G4PhaseSpaceDecayChannel("anti_doublehyperdoubleneutron", half_br_lambda_to_p_pim,
                                           2, "anti_hyperH4", "pi+");
    // anti_lambda -> anti_neutron + pi0 , without any possibility of capturing the anti_neutron
    mode[2] = new G4PhaseSpaceDecayChannel("anti_doublehyperdoubleneutron", br_lambda_to_n_piz, 5,
                                           "anti_neutron", "anti_neutron", "anti_lambda",
                                           "anti_neutron", "pi0");
    for (G4int index = 0; index < 3; ++index)
      table->Insert(mode[index]);
    delete[] mode;
    anInstance->SetDecayTable(table);
  }
  theInstance = static_cast<G4AntiDoubleHyperDoubleNeutron*>(anInstance);
  return theInstance;
}
 
G4AntiDoubleHyperDoubleNeutron*
G4AntiDoubleHyperDoubleNeutron::AntiDoubleHyperDoubleNeutronDefinition()
{
  return Definition();
}
 
G4AntiDoubleHyperDoubleNeutron* G4AntiDoubleHyperDoubleNeutron::AntiDoubleHyperDoubleNeutron()
{
  return Definition();
}