G4INCLNNToNLKpiChannel.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 "G4INCLNNToNLKpiChannel.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 NNToNLKpiChannel::angularSlope = 2.; // What is the exact effect? Sould be check
  
  NNToNLKpiChannel::NNToNLKpiChannel(Particle *p1, Particle *p2)
    : particle1(p1), particle2(p2)
    {}
  
  NNToNLKpiChannel::~NNToNLKpiChannel(){}
  
  void NNToNLKpiChannel::fillFinalState(FinalState *fs) {
    
        // pp -> p pi+ L K0 (9)
        // pp -> p pi0 L K+ (2)
        // pp -> n pi+ L K+ (1)
        // pn -> p pi- L K+ (2)
        // pn -> n pi0 L K+ (4)
    
    const G4double sqrtS = KinematicsUtils::totalEnergyInCM(particle1, particle2);
    
    const G4int iso = ParticleTable::getIsospin(particle1->getType()) + ParticleTable::getIsospin(particle2->getType());
    
    ParticleType KaonType;
    ParticleType PionType;
    
    G4double rdm = Random::shoot();
    particle2->setType(Lambda);
    
    if(iso == 2){
      if(rdm*4. < 3.){
        KaonType = KZero;
        PionType = PiPlus;
      }
      else if(rdm*12. < 11.){
        KaonType = KPlus;
        PionType = PiZero;
      }
      else{
        KaonType = KPlus;
        PionType = PiPlus;
        particle1->setType(Neutron);
      }
    }
    else if(iso == -2){
      if(rdm*4. < 3.){
        KaonType = KPlus;
        PionType = PiMinus;
      }
      else if(rdm*12. < 11.){
        KaonType = KZero;
        PionType = PiZero;
      }
      else{
        KaonType = KZero;
        PionType = PiMinus;
        particle1->setType(Proton);
      }
    }
    else if(rdm*6. < 2.){
      KaonType = KPlus;
      PionType = PiZero;
      particle1->setType(Neutron);
    }
    else if(rdm*6. < 4.){
      KaonType = KZero;
      PionType = PiZero;
      particle1->setType(Proton);
    }
    else if(rdm*6. < 5.){
      KaonType = KPlus;
      PionType = PiMinus;
      particle1->setType(Proton);
    }
    else{
      KaonType = KZero;
      PionType = PiPlus;
      particle1->setType(Neutron);
    }
    
    ParticleList list;
    list.push_back(particle1);
    list.push_back(particle2);
    const ThreeVector &rcol1 = particle1->getPosition();
    const ThreeVector &rcol2 = particle2->getPosition();
    const ThreeVector zero;
    Particle *pion = new Particle(PionType,zero,rcol1);
    Particle *kaon = new Particle(KaonType,zero,rcol2);
    list.push_back(kaon);
    list.push_back(pion);
    
    if(Random::shoot()<0.5) PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
    else PhaseSpaceGenerator::generateBiased(sqrtS, list, 1, angularSlope);
    
    fs->addModifiedParticle(particle1);
    fs->addModifiedParticle(particle2);
    fs->addCreatedParticle(kaon);
    fs->addCreatedParticle(pion);
    
  }
}