G4INCLCrossSections.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"
 
#include "G4INCLCrossSections.hh"
#include "G4INCLKinematicsUtils.hh"
#include "G4INCLParticleTable.hh"
#include "G4INCLLogger.hh"
#include "G4INCLCrossSectionsINCL46.hh"
#include "G4INCLCrossSectionsMultiPions.hh"
#include "G4INCLCrossSectionsTruncatedMultiPions.hh"
#include "G4INCLCrossSectionsMultiPionsAndResonances.hh"
#include "G4INCLCrossSectionsStrangeness.hh"
#include "G4INCLCrossSectionsAntiparticles.hh"
// #include <cassert>
 
namespace G4INCL {
 
  namespace {
    G4ThreadLocal ICrossSections *theCrossSections;
  }
 
  namespace CrossSections {
    G4double elastic(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->elastic(p1,p2);
    }
 
    G4double total(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->total(p1,p2);
    }
 
    G4double NDeltaToNN(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NDeltaToNN(p1,p2);
    }
 
    G4double NNToNDelta(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNDelta(p1,p2);
    }
 
    G4double NNToxPiNN(const G4int xpi, Particle const * const p1, Particle const * const p2) {
        return theCrossSections->NNToxPiNN(xpi,p1,p2);
    }
 
    G4double piNToDelta(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->piNToDelta(p1,p2);
    }
 
    G4double piNToxPiN(const G4int xpi, Particle const * const p1, Particle const * const p2) {
          return theCrossSections->piNToxPiN(xpi,p1,p2);
    }
      
    G4double piNToEtaN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->piNToEtaN(p1,p2);
    }
      
    G4double piNToOmegaN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->piNToOmegaN(p1,p2);
    }
      
    G4double piNToEtaPrimeN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->piNToEtaPrimeN(p1,p2);
    }
      
    G4double etaNToPiN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->etaNToPiN(p1,p2);
    }
      
    G4double etaNToPiPiN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->etaNToPiPiN(p1,p2);
    }
    
  G4double etaNToLK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->etaNToLK(p1,p2);
  }
    
  G4double etaNToSK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->etaNToSK(p1,p2);
  }
      
    G4double omegaNToPiN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->omegaNToPiN(p1,p2);
    }
      
    G4double omegaNToPiPiN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->omegaNToPiPiN(p1,p2);
    }
    
  G4double omegaNToLK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->omegaNToLK(p1,p2);
  }
    
  G4double omegaNToSK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->omegaNToSK(p1,p2);
  }
      
    G4double etaPrimeNToPiN(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->etaPrimeNToPiN(p1,p2);
    }
      
    G4double NNToNNEta(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->NNToNNEta(p1,p2);
    }
      
    G4double NNToNNEtaExclu(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->NNToNNEtaExclu(p1,p2);
    }
            
    G4double NNToNNEtaxPi(const G4int xpi, Particle const * const p1, Particle const * const p2) {
                return theCrossSections->NNToNNEtaxPi(xpi,p1,p2);
    }
      
    G4double NNToNDeltaEta(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->NNToNDeltaEta(p1,p2);
    }
 
      
   G4double NNToNNOmega(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->NNToNNOmega(p1,p2);
   }
      
   G4double NNToNNOmegaExclu(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->NNToNNOmegaExclu(p1,p2);
   }
            
   G4double NNToNNOmegaxPi(const G4int xpi, Particle const * const p1, Particle const * const p2) {
                return theCrossSections->NNToNNOmegaxPi(xpi,p1,p2);
   }
      
   G4double NNToNDeltaOmega(Particle const * const p1, Particle const * const p2) {
          return theCrossSections->NNToNDeltaOmega(p1,p2);
   }
 
    
    G4double NYelastic(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NYelastic(p1,p2);
    }
    
    G4double NKbelastic(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbelastic(p1,p2);
    }
    
    G4double NKelastic(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKelastic(p1,p2);
    }
    
    G4double NNToNLK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNLK(p1,p2);
    }
 
    G4double NNToNSK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNSK(p1,p2);
    }
 
    G4double NNToNLKpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNLKpi(p1,p2);
    }
 
    G4double NNToNSKpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNSKpi(p1,p2);
    }
 
    G4double NNToNLK2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNLK2pi(p1,p2);
    }
 
    G4double NNToNSK2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNSK2pi(p1,p2);
    }
 
    G4double NNToNNKKb(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToNNKKb(p1,p2);
    }
    
    G4double NNToMissingStrangeness(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NNToMissingStrangeness(p1,p2);
    }
 
    G4double NDeltaToNLK(Particle const * const p1, Particle const * const p2) {
        return theCrossSections->NDeltaToNLK(p1,p2);
    }
    G4double NDeltaToNSK(Particle const * const p1, Particle const * const p2) {
        return theCrossSections->NDeltaToNSK(p1,p2);
    }
    G4double NDeltaToDeltaLK(Particle const * const p1, Particle const * const p2) {
        return theCrossSections->NDeltaToDeltaLK(p1,p2);
    }
    G4double NDeltaToDeltaSK(Particle const * const p1, Particle const * const p2) {
        return theCrossSections->NDeltaToDeltaSK(p1,p2);
    }
    
    G4double NDeltaToNNKKb(Particle const * const p1, Particle const * const p2) {
        return theCrossSections->NDeltaToNNKKb(p1,p2);
    }
 
    G4double NpiToLK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToLK(p1,p2);
    }
 
    G4double NpiToSK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToSK(p1,p2);
    }
    
    G4double p_pimToSmKp(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->p_pimToSmKp(p1,p2);
    }
    
    G4double p_pimToSzKz(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->p_pimToSzKz(p1,p2);
    }
    
      G4double p_pizToSzKp(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->p_pizToSzKp(p1,p2);
    }
    
    G4double NpiToLKpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToLKpi(p1,p2);
    }
 
    G4double NpiToSKpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToSKpi(p1,p2);
    }
 
    G4double NpiToLK2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToLK2pi(p1,p2);
    }
 
    G4double NpiToSK2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToSK2pi(p1,p2);
    }
 
    G4double NpiToNKKb(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToNKKb(p1,p2);
    }
    
    G4double NpiToMissingStrangeness(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NpiToMissingStrangeness(p1,p2);
    }
 
    G4double NLToNS(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NLToNS(p1,p2);
    }
 
    G4double NSToNL(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NSToNL(p1,p2);
    }
    
    G4double NSToNS(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NSToNS(p1,p2);
    }
 
    G4double NKToNK(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKToNK(p1,p2);
    }
 
    G4double NKToNKpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKToNKpi(p1,p2);
    }
 
    G4double NKToNK2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKToNK2pi(p1,p2);
    }
 
    G4double NKbToNKb(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbToNKb(p1,p2);
    }
 
    G4double NKbToSpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbToSpi(p1,p2);
    }
 
    G4double NKbToLpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbToLpi(p1,p2);
    }
       
    G4double NNbarElastic(Particle const* const p1, Particle const* const p2){
      return theCrossSections->NNbarElastic(p1,p2);
    }
    G4double NNbarCEX(Particle const* const p1, Particle const* const p2){
      return theCrossSections->NNbarCEX(p1,p2);
    }
    G4double NNbarToLLbar(Particle const* const p1, Particle const* const p2){
      return theCrossSections->NNbarToLLbar(p1,p2);
    }
      
    G4double NNbarToNNbarpi(Particle const* const p1, Particle const* const p2){
      return theCrossSections->NNbarToNNbarpi(p1,p2);
    }
    G4double NNbarToNNbar2pi(Particle const* const p1, Particle const* const p2){
      return theCrossSections->NNbarToNNbar2pi(p1,p2);
    }
    G4double NNbarToNNbar3pi(Particle const* const p1, Particle const* const p2){
      return theCrossSections->NNbarToNNbar3pi(p1,p2);
    }
     
    G4double NNbarToAnnihilation(Particle const* const p1, Particle const* const p2){
      return theCrossSections->NNbarToAnnihilation(p1,p2);
    }
    
    G4double NKbToS2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbToS2pi(p1,p2);
    }
 
    G4double NKbToL2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbToL2pi(p1,p2);
    }
 
    G4double NKbToNKbpi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbToNKbpi(p1,p2);
    }
 
    G4double NKbToNKb2pi(Particle const * const p1, Particle const * const p2) {
      return theCrossSections->NKbToNKb2pi(p1,p2);
    }
 
 
    G4double calculateNNAngularSlope(G4double energyCM, G4int iso) {
      return theCrossSections->calculateNNAngularSlope(energyCM, iso);
    }
 
    G4double interactionDistancePiN(const G4double projectileKineticEnergy) {
      ThreeVector nullVector;
      ThreeVector unitVector(0., 0., 1.);
 
      Particle piPlusProjectile(PiPlus, unitVector, nullVector);
      piPlusProjectile.setEnergy(piPlusProjectile.getMass()+projectileKineticEnergy);
      piPlusProjectile.adjustMomentumFromEnergy();
      Particle piZeroProjectile(PiZero, unitVector, nullVector);
      piZeroProjectile.setEnergy(piZeroProjectile.getMass()+projectileKineticEnergy);
      piZeroProjectile.adjustMomentumFromEnergy();
      Particle piMinusProjectile(PiMinus, unitVector, nullVector);
      piMinusProjectile.setEnergy(piMinusProjectile.getMass()+projectileKineticEnergy);
      piMinusProjectile.adjustMomentumFromEnergy();
 
      Particle protonTarget(Proton, nullVector, nullVector);
      Particle neutronTarget(Neutron, nullVector, nullVector);
      const G4double sigmapipp = total(&piPlusProjectile, &protonTarget);
      const G4double sigmapipn = total(&piPlusProjectile, &neutronTarget);
      const G4double sigmapi0p = total(&piZeroProjectile, &protonTarget);
      const G4double sigmapi0n = total(&piZeroProjectile, &neutronTarget);
      const G4double sigmapimp = total(&piMinusProjectile, &protonTarget);
      const G4double sigmapimn = total(&piMinusProjectile, &neutronTarget);
      /* We compute the interaction distance from the largest of the pi-N cross
       * sections. Note that this is different from INCL4.6, which just takes the
       * average of the six, and will in general lead to a different geometrical
       * cross section.
       */
      const G4double largestSigma = std::max(sigmapipp, std::max(sigmapipn, std::max(sigmapi0p, std::max(sigmapi0n, std::max(sigmapimp,sigmapimn)))));
      const G4double interactionDistance = std::sqrt(largestSigma/Math::tenPi);
 
      return interactionDistance;
    }
 
    G4double interactionDistanceNN(const ParticleSpecies &aSpecies, const G4double kineticEnergy) {
// assert(aSpecies.theType==Proton || aSpecies.theType==Neutron || aSpecies.theType==Composite);
// assert(aSpecies.theA>0);
      ThreeVector nullVector;
      ThreeVector unitVector(0.,0.,1.);
 
      const G4double kineticEnergyPerNucleon = kineticEnergy / aSpecies.theA;
 
      Particle protonProjectile(Proton, unitVector, nullVector);
      protonProjectile.setEnergy(protonProjectile.getMass()+kineticEnergyPerNucleon);
      protonProjectile.adjustMomentumFromEnergy();
      Particle neutronProjectile(Neutron, unitVector, nullVector);
      neutronProjectile.setEnergy(neutronProjectile.getMass()+kineticEnergyPerNucleon);
      neutronProjectile.adjustMomentumFromEnergy();
 
      Particle protonTarget(Proton, nullVector, nullVector);
      Particle neutronTarget(Neutron, nullVector, nullVector);
      const G4double sigmapp = total(&protonProjectile, &protonTarget);
      const G4double sigmapn = total(&protonProjectile, &neutronTarget);
      const G4double sigmann = total(&neutronProjectile, &neutronTarget);
      /* We compute the interaction distance from the largest of the NN cross
       * sections. Note that this is different from INCL4.6, which just takes the
       * average of the four, and will in general lead to a different geometrical
       * cross section.
       */
      const G4double largestSigma = std::max(sigmapp, std::max(sigmapn, sigmann));
      const G4double interactionDistance = std::sqrt(largestSigma/Math::tenPi);
 
      return interactionDistance;
    }
    G4double interactionDistanceNbarN(const ParticleSpecies &aSpecies, const G4double kineticEnergy) {
//      assert(aSpecies.theType==antiComposite);
//      assert(aSpecies.theA<0);
      ThreeVector nullVector;
      ThreeVector unitVector(0.,0.,1.);
 
      const G4double kineticEnergyPerNucleon = kineticEnergy / (-aSpecies.theA);
 
      Particle antiprotonProjectile(antiProton, unitVector, nullVector);
      antiprotonProjectile.setEnergy(antiprotonProjectile.getMass()+kineticEnergyPerNucleon);
      antiprotonProjectile.adjustMomentumFromEnergy();
      Particle antineutronProjectile(antiNeutron, unitVector, nullVector);
      antineutronProjectile.setEnergy(antineutronProjectile.getMass()+kineticEnergyPerNucleon);
      antineutronProjectile.adjustMomentumFromEnergy();
 
      Particle protonTarget(Proton, nullVector, nullVector);
      Particle neutronTarget(Neutron, nullVector, nullVector);
      const double sigmapbarp = total(&antiprotonProjectile, &protonTarget);
      const double sigmapbarn = total(&antiprotonProjectile, &neutronTarget);
      const double sigmanbarn = total(&antineutronProjectile, &neutronTarget);
      const double sigmanbarp = total(&antineutronProjectile, &protonTarget);
      /* We compute the interaction distance from the largest of the NN cross
       * sections. Note that this is different from INCL4.6, which just takes the
       * average of the four, and will in general lead to a different geometrical
       * cross section.
       */
      const G4double largestSigma = std::max(std::max(sigmapbarp,sigmapbarn), std::max(sigmanbarn,sigmanbarp));
      const G4double interactionDistance = std::sqrt(largestSigma/Math::tenPi);
 
      return interactionDistance;
    }
 
    G4double interactionDistancenbarN(const ParticleSpecies &aSpecies, const G4double kineticEnergy) {
//      assert(aSpecies.theType==antiNeutron);
//      assert(aSpecies.theA<0);
      ThreeVector nullVector;
      ThreeVector unitVector(0.,0.,1.);
 
      const G4double kineticEnergyPerNucleon = kineticEnergy / (- aSpecies.theA);
 
      Particle antineutronProjectile(antiNeutron, unitVector, nullVector);
      antineutronProjectile.setEnergy(antineutronProjectile.getMass()+kineticEnergyPerNucleon);
      antineutronProjectile.adjustMomentumFromEnergy();
 
      Particle protonTarget(Proton, nullVector, nullVector);
      Particle neutronTarget(Neutron, nullVector, nullVector);
      const G4double sigmanbarp = total(&antineutronProjectile, &protonTarget);
      const G4double sigmanbarn = total(&antineutronProjectile, &neutronTarget);
      /* We compute the interaction distance from the largest of the NN cross
       * sections. Note that this is different from INCL4.6, which just takes the
       * average of the four, and will in general lead to a different geometrical
       * cross section.
       */
      const G4double largestSigma = std::max(sigmanbarp, sigmanbarn);
      const G4double interactionDistance = std::sqrt(largestSigma/Math::tenPi);
 
      return interactionDistance;
    }
 
    G4double interactionDistanceKN(const G4double kineticEnergy) {
      ThreeVector nullVector;
      ThreeVector unitVector(0.,0.,1.);
 
      Particle kpProjectile(KPlus, unitVector, nullVector);
      kpProjectile.setEnergy(kpProjectile.getMass()+kineticEnergy);
      kpProjectile.adjustMomentumFromEnergy();
      Particle kzProjectile(KZero, unitVector, nullVector);
      kzProjectile.setEnergy(kzProjectile.getMass()+kineticEnergy);
      kzProjectile.adjustMomentumFromEnergy();
 
      Particle protonTarget(Proton, nullVector, nullVector);
      Particle neutronTarget(Neutron, nullVector, nullVector);
      const G4double sigmakpp = total(&kpProjectile, &protonTarget);
      const G4double sigmakpn = total(&kpProjectile, &neutronTarget);
      const G4double sigmakzp = total(&kzProjectile, &protonTarget);
      const G4double sigmakzn = total(&kzProjectile, &neutronTarget);
      
      const G4double largestSigma = std::max(sigmakpp, std::max(sigmakpn, std::max(sigmakzp, sigmakzn)));
      const G4double interactionDistance = std::sqrt(largestSigma/Math::tenPi);
 
      return interactionDistance;
    }
 
    G4double interactionDistanceKbarN(const G4double kineticEnergy) {
      ThreeVector nullVector;
      ThreeVector unitVector(0.,0.,1.);
 
      Particle kmProjectile(KMinus, unitVector, nullVector);
      kmProjectile.setEnergy(kmProjectile.getMass()+kineticEnergy);
      kmProjectile.adjustMomentumFromEnergy();
      Particle kzProjectile(KZeroBar, unitVector, nullVector);
      kzProjectile.setEnergy(kzProjectile.getMass()+kineticEnergy);
      kzProjectile.adjustMomentumFromEnergy();
 
      Particle protonTarget(Proton, nullVector, nullVector);
      Particle neutronTarget(Neutron, nullVector, nullVector);
      const G4double sigmakmp = total(&kmProjectile, &protonTarget);
      const G4double sigmakmn = total(&kmProjectile, &neutronTarget);
      const G4double sigmakzp = total(&kzProjectile, &protonTarget);
      const G4double sigmakzn = total(&kzProjectile, &neutronTarget);
      
      const G4double largestSigma = std::max(sigmakmp, std::max(sigmakmn, std::max(sigmakzp, sigmakzn)));
      const G4double interactionDistance = std::sqrt(largestSigma/Math::tenPi);
 
      return interactionDistance;
    }
 
    G4double interactionDistanceYN(const G4double kineticEnergy) {
      ThreeVector nullVector;
      ThreeVector unitVector(0.,0.,1.);
 
      Particle lProjectile(Lambda, unitVector, nullVector);
      lProjectile.setEnergy(lProjectile.getMass()+kineticEnergy);
      lProjectile.adjustMomentumFromEnergy();
      Particle spProjectile(SigmaPlus, unitVector, nullVector);
      spProjectile.setEnergy(spProjectile.getMass()+kineticEnergy);
      spProjectile.adjustMomentumFromEnergy();
      Particle szProjectile(SigmaZero, unitVector, nullVector);
      szProjectile.setEnergy(szProjectile.getMass()+kineticEnergy);
      szProjectile.adjustMomentumFromEnergy();
      Particle smProjectile(SigmaMinus, unitVector, nullVector);
      smProjectile.setEnergy(smProjectile.getMass()+kineticEnergy);
      smProjectile.adjustMomentumFromEnergy();
 
      Particle protonTarget(Proton, nullVector, nullVector);
      Particle neutronTarget(Neutron, nullVector, nullVector);
      const G4double sigmalp = total(&lProjectile, &protonTarget);
      const G4double sigmaln = total(&lProjectile, &neutronTarget);
      const G4double sigmaspp = total(&spProjectile, &protonTarget);
      const G4double sigmaspn = total(&spProjectile, &neutronTarget);
      const G4double sigmaszp = total(&szProjectile, &protonTarget);
      const G4double sigmaszn = total(&szProjectile, &neutronTarget);
      const G4double sigmasmp = total(&smProjectile, &protonTarget);
      const G4double sigmasmn = total(&smProjectile, &neutronTarget);
      
      const G4double largestSigma = std::max(sigmalp, std::max(sigmaln, std::max(sigmaspp, std::max(sigmaspn, std::max(sigmaszp, std::max(sigmaszn, std::max(sigmasmp, sigmasmn)))))));
      const G4double interactionDistance = std::sqrt(largestSigma/Math::tenPi);
 
      return interactionDistance;
    }
 
    void setCrossSections(ICrossSections *c) {
      theCrossSections = c;
    }
 
    void deleteCrossSections() {
      delete theCrossSections;
      theCrossSections = NULL;
    }
 
      void initialize(Config const * const theConfig) {
          CrossSectionsType crossSections = theConfig->getCrossSectionsType();
          if(crossSections == INCL46CrossSections)
              setCrossSections(new CrossSectionsINCL46);
          else if(crossSections == MultiPionsCrossSections)
              setCrossSections(new CrossSectionsMultiPions);
          else if(crossSections == TruncatedMultiPionsCrossSections) {
              const G4int nMaxPi = theConfig->getMaxNumberMultipions();
              if(nMaxPi>0)
                  setCrossSections(new CrossSectionsTruncatedMultiPions(nMaxPi));
              else {
                  INCL_WARN("Truncated multipion cross sections were requested, but the specified maximum\n"
                            << "number of pions is <=0. Falling back to standard multipion cross-sections.\n");
                  setCrossSections(new CrossSectionsMultiPions);
              }
          } else if(crossSections == MultiPionsAndResonancesCrossSections)
              setCrossSections(new CrossSectionsMultiPionsAndResonances);
            else if(crossSections == StrangenessCrossSections)
              setCrossSections(new CrossSectionsStrangeness);
      else if(crossSections == AntiparticlesCrossSections)
        setCrossSections(new CrossSectionsAntiparticles);
      }
  }
}