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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 "G4INCLNpiToLKpiChannel.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 NpiToLKpiChannel::angularSlope = 6.; // What is the exact effect? Sould be check
50
51 NpiToLKpiChannel::NpiToLKpiChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NpiToLKpiChannel::~NpiToLKpiChannel(){}
56
57 void NpiToLKpiChannel::fillFinalState(FinalState *fs) {
58
59 // ratio
60 // p pi+ (1) p pi0 (3/2) p pi- (2)
61 //
62 // p pi0 -> L K+ pi0 (1/2)
63 // all the others (1)
64
65 Particle *nucleon;
66 Particle *pion;
67
68 if(particle1->isNucleon()){
69 nucleon = particle1;
70 pion = particle2;
71 }
72 else{
73 nucleon = particle2;
74 pion = particle1;
75 }
76
77 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
78
79 const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(pion->getType());
80 G4double rdm = Random::shoot();
81
82 ParticleType KaonType;
83
84 if(iso == 3 || iso == -3){
85 KaonType = ParticleTable::getKaonType(iso/3);
86 }
87 else if(pion->getType() == PiZero){
88 if(rdm*3. < 1.){
89 KaonType = ParticleTable::getKaonType(iso);
90 }
91 else{
92 KaonType = ParticleTable::getKaonType(-iso);
93 pion->setType(ParticleTable::getPionType(2*iso));
94 }
95 }
96 else{
97 if(rdm < 0.5){
98 KaonType = ParticleTable::getKaonType(-iso);
99 }
100 else{
101 KaonType = ParticleTable::getKaonType(iso);
102 pion->setType(PiZero);
103 }
104 }
105
106 nucleon->setType(Lambda);
107
108 #ifdef INCLXX_IN_GEANT4_MODE
109 // Erase the parent resonance information of the nucleon and pion
110 nucleon->setParentResonancePDGCode(0);
111 nucleon->setParentResonanceID(0);
112 pion->setParentResonancePDGCode(0);
113 pion->setParentResonanceID(0);
114 #endif
115
116 ParticleList list;
117 list.push_back(nucleon);
118 list.push_back(pion);
119 const ThreeVector &rcol = nucleon->getPosition();
120 const ThreeVector zero;
121 Particle *kaon = new Particle(KaonType,zero,rcol);
122 list.push_back(kaon);
123
124 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
125
126 INCL_DEBUG("NpiToLKpi " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
127
128 fs->addModifiedParticle(nucleon);
129 fs->addModifiedParticle(pion);
130 fs->addCreatedParticle(kaon);
131
132 }
133 }
134