151 lines
5.1 KiB
C++
151 lines
5.1 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// INCL++ intra-nuclear cascade model
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// Alain Boudard, CEA-Saclay, France
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// Joseph Cugnon, University of Liege, Belgium
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// Jean-Christophe David, CEA-Saclay, France
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// Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
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// Sylvie Leray, CEA-Saclay, France
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// Davide Mancusi, CEA-Saclay, France
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//
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#define INCLXX_IN_GEANT4_MODE 1
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#include "globals.hh"
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#include "G4INCLNpiToNKKbChannel.hh"
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#include "G4INCLKinematicsUtils.hh"
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#include "G4INCLBinaryCollisionAvatar.hh"
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#include "G4INCLRandom.hh"
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#include "G4INCLGlobals.hh"
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#include "G4INCLLogger.hh"
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#include <algorithm>
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#include "G4INCLPhaseSpaceGenerator.hh"
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namespace G4INCL {
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const G4double NpiToNKKbChannel::angularSlope = 6.; // What is the exact effect? Sould be check
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NpiToNKKbChannel::NpiToNKKbChannel(Particle *p1, Particle *p2)
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: particle1(p1), particle2(p2)
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{}
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NpiToNKKbChannel::~NpiToNKKbChannel(){}
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void NpiToNKKbChannel::fillFinalState(FinalState *fs) {
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// p pi+ -> p K+ K0b (1/2)
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// p pi0 -> p K0 K0b (1/4)
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// p pi0 -> p K+ K- (1/4)
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// p pi0 -> n K+ K0b (1)
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// p pi- -> p K0 K- (1/2)
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// p pi- -> n K+ K- (1)
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// p pi- -> n K0 K0b (1)
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Particle *nucleon;
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Particle *pion;
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if(particle1->isNucleon()){
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nucleon = particle1;
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pion = particle2;
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}
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else{
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nucleon = particle2;
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pion = particle1;
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}
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const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
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const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(pion->getType());
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G4double rdm = Random::shoot();
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ParticleType KaonType;
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if(iso == 3 || iso == -3){
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KaonType = ParticleTable::getKaonType(iso/3);
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pion->setType(ParticleTable::getAntiKaonType(iso/3));
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}
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else if(pion->getType() == PiZero){
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if(rdm*6. < 1.){
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KaonType = ParticleTable::getKaonType(-iso);
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pion->setType(ParticleTable::getAntiKaonType(iso));
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}
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else if(rdm*6. < 2.){
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KaonType = ParticleTable::getKaonType(iso);
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pion->setType(ParticleTable::getAntiKaonType(-iso));
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}
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else{
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KaonType = ParticleTable::getKaonType(iso);
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pion->setType(ParticleTable::getAntiKaonType(iso));
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nucleon->setType(ParticleTable::getNucleonType(-iso));
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}
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}
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else{
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if(rdm*5. < 1.){
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KaonType = ParticleTable::getKaonType(iso);
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pion->setType(ParticleTable::getAntiKaonType(iso));
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}
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else if(rdm*5. < 3.){
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KaonType = ParticleTable::getKaonType(-iso);
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pion->setType(ParticleTable::getAntiKaonType(iso));
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nucleon->setType(ParticleTable::getNucleonType(iso));
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}
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else{
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KaonType = ParticleTable::getKaonType(iso);
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pion->setType(ParticleTable::getAntiKaonType(-iso));
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nucleon->setType(ParticleTable::getNucleonType(iso));
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}
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}
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#ifdef INCLXX_IN_GEANT4_MODE
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// Erase the parent resonance information of the nucleon and pion
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nucleon->setParentResonancePDGCode(0);
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nucleon->setParentResonanceID(0);
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pion->setParentResonancePDGCode(0);
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pion->setParentResonanceID(0);
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#endif
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ParticleList list;
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list.push_back(nucleon);
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list.push_back(pion);
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const ThreeVector &rcol = pion->getPosition();
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const ThreeVector zero;
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Particle *kaon = new Particle(KaonType,zero,rcol);
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list.push_back(kaon);
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PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
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INCL_DEBUG("NpiToNKKb " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
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fs->addModifiedParticle(nucleon);
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fs->addModifiedParticle(pion);
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fs->addCreatedParticle(kaon);
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}
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}
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