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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 "G4INCLNpiToSKpiChannel.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 NpiToSKpiChannel::angularSlope = 6.; // What is the exact effect? Sould be check
50
51 NpiToSKpiChannel::NpiToSKpiChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NpiToSKpiChannel::~NpiToSKpiChannel(){}
56
57 void NpiToSKpiChannel::fillFinalState(FinalState *fs) {
58
59 // p pi+ -> S+ pi+ K0 (5/4)
60 // p pi+ -> S+ pi0 K+ (3/4)
61 // p pi+ -> S0 pi+ K+ (1/4)
62 //
63 // p pi0 -> S+ pi0 K0 (1/2)
64 // p pi0 -> S+ pi- K+ (1/2)
65 // p pi0 -> S0 pi+ K0 (3/4)
66 // p pi0 -> S0 pi0 K+ (3/8)
67 // p pi0 -> S- pi+ K+ (1/2)
68 //
69 // p pi- -> S+ pi- K0 (3/8)
70 // p pi- -> S0 pi0 K0 (5/8)
71 // p pi- -> S0 pi- K+ (5/8)
72 // p pi- -> S- pi+ K0 (1)
73 // p pi- -> S- pi0 K+ (3/8)
74
75 Particle *nucleon;
76 Particle *pion;
77
78
79 if(particle1->isNucleon()){
80 nucleon = particle1;
81 pion = particle2;
82 }
83 else{
84 nucleon = particle2;
85 pion = particle1;
86 }
87
88 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
89
90 const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(pion->getType());
91 G4double rdm = Random::shoot();
92
93 ParticleType KaonType;
94
95 if(iso == 3 || iso == -3){
96 if(rdm*9. < 5.){
97 KaonType = ParticleTable::getKaonType(-iso/3);
98 nucleon->setType(ParticleTable::getSigmaType(iso/3*2));
99 }
100 else if(rdm*9. < 8.){
101 KaonType = ParticleTable::getKaonType(iso/3);
102 pion->setType(PiZero);
103 nucleon->setType(ParticleTable::getSigmaType(iso/3*2));
104 }
105 else{
106 KaonType = ParticleTable::getKaonType(iso/3);
107 nucleon->setType(SigmaZero);
108 }
109 }
110 else if(pion->getType() == PiZero){
111 if(rdm*21. < 4.){
112 KaonType = ParticleTable::getKaonType(-iso);
113 nucleon->setType(ParticleTable::getSigmaType(iso*2));
114 }
115 else if(rdm*21. < 8.){
116 KaonType = ParticleTable::getKaonType(iso);
117 pion->setType(ParticleTable::getPionType(-2*iso));
118 nucleon->setType(ParticleTable::getSigmaType(iso*2));
119 }
120 else if(rdm*21. < 14.){
121 KaonType = ParticleTable::getKaonType(-iso);
122 pion->setType(ParticleTable::getPionType(2*iso));
123 nucleon->setType(SigmaZero);
124 }
125 else if(rdm*21. < 17.){
126 KaonType = ParticleTable::getKaonType(iso);
127 nucleon->setType(SigmaZero);
128 }
129 else{
130 KaonType = ParticleTable::getKaonType(iso);
131 pion->setType(ParticleTable::getPionType(2*iso));
132 nucleon->setType(ParticleTable::getSigmaType(-iso*2));
133 }
134 }
135 else{
136 if(rdm*24. < 3.){
137 KaonType = ParticleTable::getKaonType(iso);
138 nucleon->setType(ParticleTable::getSigmaType(-iso*2));
139 }
140 else if(rdm*24. < 8.){
141 KaonType = ParticleTable::getKaonType(iso);
142 pion->setType(PiZero);
143 nucleon->setType(SigmaZero);
144 }
145 else if(rdm*24. < 13.){
146 KaonType = ParticleTable::getKaonType(-iso);
147 nucleon->setType(SigmaZero);
148 }
149 else if(rdm*24. < 21.){
150 KaonType = ParticleTable::getKaonType(iso);
151 pion->setType(ParticleTable::getPionType(-2*iso));
152 nucleon->setType(ParticleTable::getSigmaType(iso*2));
153 }
154 else{
155 KaonType = ParticleTable::getKaonType(-iso);
156 pion->setType(PiZero);
157 nucleon->setType(ParticleTable::getSigmaType(iso*2));
158 }
159 }
160
161 #ifdef INCLXX_IN_GEANT4_MODE
162 // Erase the parent resonance information of the nucleon and pion
163 nucleon->setParentResonancePDGCode(0);
164 nucleon->setParentResonanceID(0);
165 pion->setParentResonancePDGCode(0);
166 pion->setParentResonanceID(0);
167 #endif
168
169 ParticleList list;
170 list.push_back(nucleon);
171 list.push_back(pion);
172 const ThreeVector &rcol = nucleon->getPosition();
173 const ThreeVector zero;
174 Particle *kaon = new Particle(KaonType,zero,rcol);
175 list.push_back(kaon);
176
177 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
178
179 INCL_DEBUG("NpiToSKpi " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
180
181 fs->addModifiedParticle(nucleon);
182 fs->addModifiedParticle(pion);
183 fs->addCreatedParticle(kaon);
184
185 }
186 }
187