Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/hadronic/models/inclxx/incl_physics/src/G4INCLNKbToL2piChannel.cc

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 25 //
 26 // INCL++ intra-nuclear cascade model
 27 // Alain Boudard, CEA-Saclay, France
 28 // Joseph Cugnon, University of Liege, Belgium
 29 // Jean-Christophe David, CEA-Saclay, France
 30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
 31 // Sylvie Leray, CEA-Saclay, France
 32 // Davide Mancusi, CEA-Saclay, France
 33 //
 34 #define INCLXX_IN_GEANT4_MODE 1
 35 
 36 #include "globals.hh"
 37 
 38 #include "G4INCLNKbToL2piChannel.hh"
 39 #include "G4INCLKinematicsUtils.hh"
 40 #include "G4INCLBinaryCollisionAvatar.hh"
 41 #include "G4INCLRandom.hh"
 42 #include "G4INCLGlobals.hh"
 43 #include "G4INCLLogger.hh"
 44 #include <algorithm>
 45 #include "G4INCLPhaseSpaceGenerator.hh"
 46 
 47 namespace G4INCL {
 48   
 49   const G4double NKbToL2piChannel::angularSlope = 4.; // What is the exact effect? Sould be check
 50   
 51   NKbToL2piChannel::NKbToL2piChannel(Particle *p1, Particle *p2)
 52     : particle1(p1), particle2(p2)
 53     {}
 54   
 55   NKbToL2piChannel::~NKbToL2piChannel(){}
 56   
 57   void NKbToL2piChannel::fillFinalState(FinalState *fs) {
 58         
 59         // p K0b -> L pi+ pi0 (1)
 60         //
 61         // p K-  -> L pi+ pi- (1)
 62         // p K-  -> L pi0 pi0 (1/4)
 63         
 64     Particle *nucleon;
 65     Particle *kaon;
 66         
 67     if(particle1->isNucleon()){
 68       nucleon = particle1;
 69       kaon = particle2;
 70     }
 71     else{
 72       nucleon = particle2;
 73       kaon = particle1;
 74     }
 75     
 76     const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, kaon);
 77     
 78     const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(kaon->getType());
 79     const G4int iso_n = ParticleTable::getIsospin(nucleon->getType());
 80     G4double rdm = Random::shoot();
 81     
 82     ParticleType PionType;
 83     
 84     if(iso == 2 || iso == -2){
 85       PionType = ParticleTable::getPionType(iso);
 86       kaon->setType(PiZero);
 87     }
 88     else{
 89       if(rdm*5. < 4.){
 90         PionType = ParticleTable::getPionType(2*iso_n);
 91         kaon->setType(ParticleTable::getPionType(-2*iso_n));
 92       }
 93       else{
 94         PionType = PiZero;
 95         kaon->setType(PiZero);
 96       }
 97     }
 98     
 99     nucleon->setType(Lambda);
100     
101     ParticleList list;
102     list.push_back(nucleon);
103     list.push_back(kaon);
104     const ThreeVector &rcol = nucleon->getPosition();
105     const ThreeVector zero;
106     Particle *pion = new Particle(PionType,zero,rcol);
107     list.push_back(pion);
108     
109     PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
110     
111     fs->addModifiedParticle(nucleon);
112     fs->addModifiedParticle(kaon);
113     fs->addCreatedParticle(pion);
114     
115   }
116 }
117