G4PionMinus.cc

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// $Id$
//
// 
// ----------------------------------------------------------------------
//      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 "G4PionMinus.hh"
#include "G4SystemOfUnits.hh"
#include "G4ParticleTable.hh"
 
#include "G4PhaseSpaceDecayChannel.hh"
#include "G4DecayTable.hh"
 
// ######################################################################
// ###                         PIONMINUS                              ###
// ######################################################################
 
G4PionMinus* G4PionMinus::theInstance = 0;
 
G4PionMinus* G4PionMinus::Definition()
{
  if (theInstance !=0) return theInstance;
  const G4String name = "pi-";
  // 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,    0.1395701*GeV, 2.5284e-14*MeV,    -1.*eplus,
                    0,              -1,             0,
                    2,              -2,            -1,
              "meson",               0,             0,        -211,
                false,       26.033*ns,          NULL,
                false,       "pi");
 
 //create Decay Table
  G4DecayTable* table = new G4DecayTable();
 
  // create a decay channel
  // pi- -> mu- + anti_nu_mu
  G4VDecayChannel* mode = new G4PhaseSpaceDecayChannel("pi-",1.00,2,"mu-","anti_nu_mu");
  table->Insert(mode);
 
   anInstance->SetDecayTable(table);
  }
  theInstance = reinterpret_cast<G4PionMinus*>(anInstance);
  return theInstance;
}
 
G4PionMinus*  G4PionMinus::PionMinusDefinition()
{
  return Definition();
}
 
G4PionMinus*  G4PionMinus::PionMinus()
{
  return Definition();
}