G4INCLNSToNLChannel.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 "G4INCLNSToNLChannel.hh"
#include "G4INCLKinematicsUtils.hh"
#include "G4INCLBinaryCollisionAvatar.hh"
#include "G4INCLRandom.hh"
#include "G4INCLGlobals.hh"
#include "G4INCLLogger.hh"
#include <algorithm>
#include "G4INCLPhaseSpaceGenerator.hh"

namespace G4INCL {
  
  NSToNLChannel::NSToNLChannel(Particle *p1, Particle *p2)
    : particle1(p1), particle2(p2)
    {}
  
  NSToNLChannel::~NSToNLChannel(){}
  
  void NSToNLChannel::fillFinalState(FinalState *fs) {
    
    Particle *nucleon;
    Particle *sigma;
    
    if(particle1->isNucleon()){
      nucleon = particle1;
      sigma = particle2;
    }
    else{
      nucleon = particle2;
      sigma = particle1;
    }
    
    const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, sigma);
    
    const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(sigma->getType());
// assert(iso == -1 || iso == 1);
    
    nucleon->setType(ParticleTable::getNucleonType(iso));
    sigma->setType(Lambda);
    
    G4double mn=nucleon->getMass();
    G4double my=sigma->getMass();
    
    G4double ey=(sqrtS*sqrtS+my*my-mn*mn)/(2*sqrtS);
    G4double en=std::sqrt(ey*ey-my*my+mn*mn);
    nucleon->setEnergy(en);
    sigma->setEnergy(ey);
    G4double py=std::sqrt(ey*ey-my*my);
    
    ThreeVector mom_hyperon = Random::normVector(py);

    sigma->setMomentum(mom_hyperon);
    nucleon->setMomentum(-mom_hyperon);
    
    fs->addModifiedParticle(nucleon);
    fs->addModifiedParticle(sigma);
        
  }
}