G4INCLNNToNSKChannel.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 "G4INCLNNToNSKChannel.hh"
#include "G4INCLKinematicsUtils.hh"
#include "G4INCLBinaryCollisionAvatar.hh"
#include "G4INCLRandom.hh"
#include "G4INCLGlobals.hh"
#include "G4INCLLogger.hh"
#include <algorithm>
#include "G4INCLPhaseSpaceGenerator.hh"

namespace G4INCL {
  
  const G4double NNToNSKChannel::angularSlope = 2.; // What is the exact effect? Sould be check
  
  NNToNSKChannel::NNToNSKChannel(Particle *p1, Particle *p2)
    : particle1(p1), particle2(p2)
    {}
  
  NNToNSKChannel::~NNToNSKChannel(){}
  
  void NNToNSKChannel::fillFinalState(FinalState *fs) {
  
    
    const G4double sqrtS = KinematicsUtils::totalEnergyInCM(particle1, particle2);
    
    const G4int iso = ParticleTable::getIsospin(particle1->getType()) + ParticleTable::getIsospin(particle2->getType());
    
    ParticleType KaonType;
    const G4double rdm = Random::shoot();
    // pp->pS+K0 (1/4)
        // pp->pS0K+ (1/8)
        // pp->nS+K+ (1)
        
        // pn->nS+K0 (1/4)
        // pn->pS-K+ (1/4)
        // pn->nS0K+ (5/8)
        // pn->pS0K0 (5/8)
    
    if(iso == 2){
      if(rdm * 6. < 4.){
        KaonType = KPlus;
        particle2->setType(SigmaPlus);
        particle1->setType(Neutron);
      }
      else if(rdm * 6. < 5.){
        KaonType = KZero;
        particle2->setType(SigmaPlus);
      }
      else{
        KaonType = KPlus;
        particle2->setType(SigmaZero);
      }
    }
    else if(iso == -2){
      if(rdm * 6. < 8.){
        KaonType = KZero;
        particle2->setType(SigmaMinus);
        particle1->setType(Proton);
      }
      else if(rdm * 6. < 5.){
        KaonType = KPlus;
        particle2->setType(SigmaMinus);
      }
      else{
        KaonType = KZero;
        particle2->setType(SigmaZero);
      }
    }
    else{
      if(rdm * 14. < 2.){
        KaonType = KZero;
        particle2->setType(SigmaPlus);
        particle1->setType(Neutron);
      }
      else if(rdm * 14. < 4.){
        KaonType = KPlus;
        particle2->setType(SigmaMinus);
        particle1->setType(Proton);
      }
      else if(rdm * 14. < 9.){
        KaonType = KPlus;
        particle2->setType(SigmaZero);
        particle1->setType(Neutron);
      }
      else{
        KaonType = KZero;
        particle2->setType(SigmaZero);
        particle1->setType(Proton);
      }
    }
    
    ParticleList list;
    list.push_back(particle1);
    list.push_back(particle2);
    const ThreeVector &rcol = particle2->getPosition();
    const ThreeVector zero;
    Particle *kaon = new Particle(KaonType,zero,rcol);
    list.push_back(kaon);
    
    PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
    
    INCL_DEBUG("NNToNSK " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
    
    fs->addModifiedParticle(particle1);
    fs->addModifiedParticle(particle2);
    fs->addCreatedParticle(kaon);
    
    
  }
}