G4INCLCrossSectionsTruncatedMultiPions.cc

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//
// INCL++ intra-nuclear cascade model
// Alain Boudard, CEA-Saclay, France
// Joseph Cugnon, University of Liege, Belgium
// Jean-Christophe David, CEA-Saclay, France
// Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
// Sylvie Leray, CEA-Saclay, France
// Davide Mancusi, CEA-Saclay, France
//
#define INCLXX_IN_GEANT4_MODE 1
 
#include "globals.hh"
 
/** \file G4INCLCrossSectionsTruncatedMultiPions.cc
 * \brief Truncated multipion cross sections
 *
 * \date 10th December 2014
 * \author Davide Mancusi
 */
 
#include "G4INCLCrossSectionsTruncatedMultiPions.hh"
// #include <cassert>
 
namespace G4INCL {
 
  CrossSectionsTruncatedMultiPions::CrossSectionsTruncatedMultiPions(const G4int nPi) :
    nMaxPi(nPi)
  {}
 
  G4double CrossSectionsTruncatedMultiPions::elastic(Particle const * const p1, Particle const * const p2) {
//    if(!p1->isPion() && !p2->isPion()) {
     if((p1->isNucleon()||p1->isDelta()) && (p2->isNucleon()||p2->isDelta())){
      return NNElastic(p1, p2);
    } 
//  else if (p1->isNucleon() || p2->isNucleon()) {
     else if ((p1->isNucleon() && p2->isPion()) || (p2->isNucleon() && p1->isPion())){
      G4double pielas = piNTot(p1,p2) - piNIne(p1,p2) - CrossSectionsMultiPions::piNToDelta(p1,p2);
      if (pielas < 0.)
        pielas = 0.;
      return pielas;
    } else
      return 0.0;
  }
 
  G4double CrossSectionsTruncatedMultiPions::piNToDelta(Particle const * const particle1, Particle const * const particle2) {
    G4double sum = CrossSectionsMultiPions::piNToDelta(particle1, particle2);
    if(nMaxPi<=1) {
      for(G4int i=nMaxPi+1; i<=nMaxPiPiN; ++i)
        sum += CrossSectionsMultiPions::piNToxPiN(i, particle1, particle2);
    }
    return sum;
  }
 
  G4double CrossSectionsTruncatedMultiPions::NNToxPiNN(const G4int xpi, Particle const * const particle1, Particle const * const particle2) {
    if(xpi<nMaxPi)
      return CrossSectionsMultiPions::NNToxPiNN(xpi, particle1, particle2);
    else if(xpi==nMaxPi) {
      G4double sum = 0.;
      for(G4int i=xpi; i<=nMaxPiNN; ++i)
        sum += CrossSectionsMultiPions::NNToxPiNN(i, particle1, particle2);
      return sum;
    } else
      return 0.;
  }
 
  G4double CrossSectionsTruncatedMultiPions::piNToxPiN(const G4int xpi, Particle const * const particle1, Particle const * const particle2) {
    if(xpi<nMaxPi)
      return CrossSectionsMultiPions::piNToxPiN(xpi, particle1, particle2);
    else if(xpi==nMaxPi) {
      G4double sum = 0.;
      for(G4int i=xpi; i<=nMaxPiPiN; ++i)
        sum += CrossSectionsMultiPions::piNToxPiN(i, particle1, particle2);
      return sum;
    } else
      return 0.;
  }
 
} // namespace G4INCL