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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 "G4INCLNpiToNKKbChannel.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 NpiToNKKbChannel::angularSlope = 6.; // What is the exact effect? Sould be check
50
51 NpiToNKKbChannel::NpiToNKKbChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NpiToNKKbChannel::~NpiToNKKbChannel(){}
56
57 void NpiToNKKbChannel::fillFinalState(FinalState *fs) {
58
59 // p pi+ -> p K+ K0b (1/2)
60
61 // p pi0 -> p K0 K0b (1/4)
62 // p pi0 -> p K+ K- (1/4)
63 // p pi0 -> n K+ K0b (1)
64
65 // p pi- -> p K0 K- (1/2)
66 // p pi- -> n K+ K- (1)
67 // p pi- -> n K0 K0b (1)
68
69 Particle *nucleon;
70 Particle *pion;
71
72
73 if(particle1->isNucleon()){
74 nucleon = particle1;
75 pion = particle2;
76 }
77 else{
78 nucleon = particle2;
79 pion = particle1;
80 }
81
82 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
83
84 const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(pion->getType());
85 G4double rdm = Random::shoot();
86
87 ParticleType KaonType;
88
89 if(iso == 3 || iso == -3){
90 KaonType = ParticleTable::getKaonType(iso/3);
91 pion->setType(ParticleTable::getAntiKaonType(iso/3));
92 }
93 else if(pion->getType() == PiZero){
94 if(rdm*6. < 1.){
95 KaonType = ParticleTable::getKaonType(-iso);
96 pion->setType(ParticleTable::getAntiKaonType(iso));
97 }
98 else if(rdm*6. < 2.){
99 KaonType = ParticleTable::getKaonType(iso);
100 pion->setType(ParticleTable::getAntiKaonType(-iso));
101 }
102 else{
103 KaonType = ParticleTable::getKaonType(iso);
104 pion->setType(ParticleTable::getAntiKaonType(iso));
105 nucleon->setType(ParticleTable::getNucleonType(-iso));
106 }
107 }
108 else{
109 if(rdm*5. < 1.){
110 KaonType = ParticleTable::getKaonType(iso);
111 pion->setType(ParticleTable::getAntiKaonType(iso));
112 }
113 else if(rdm*5. < 3.){
114 KaonType = ParticleTable::getKaonType(-iso);
115 pion->setType(ParticleTable::getAntiKaonType(iso));
116 nucleon->setType(ParticleTable::getNucleonType(iso));
117 }
118 else{
119 KaonType = ParticleTable::getKaonType(iso);
120 pion->setType(ParticleTable::getAntiKaonType(-iso));
121 nucleon->setType(ParticleTable::getNucleonType(iso));
122 }
123 }
124
125 #ifdef INCLXX_IN_GEANT4_MODE
126 // Erase the parent resonance information of the nucleon and pion
127 nucleon->setParentResonancePDGCode(0);
128 nucleon->setParentResonanceID(0);
129 pion->setParentResonancePDGCode(0);
130 pion->setParentResonanceID(0);
131 #endif
132
133 ParticleList list;
134 list.push_back(nucleon);
135 list.push_back(pion);
136 const ThreeVector &rcol = pion->getPosition();
137 const ThreeVector zero;
138 Particle *kaon = new Particle(KaonType,zero,rcol);
139 list.push_back(kaon);
140
141 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
142
143 INCL_DEBUG("NpiToNKKb " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
144
145 fs->addModifiedParticle(nucleon);
146 fs->addModifiedParticle(pion);
147 fs->addCreatedParticle(kaon);
148
149 }
150 }
151