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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 "G4INCLNpiToSK2piChannel.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 NpiToSK2piChannel::angularSlope = 6.; // What is the exact effect? Sould be check
50
51 NpiToSK2piChannel::NpiToSK2piChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NpiToSK2piChannel::~NpiToSK2piChannel(){}
56
57 void NpiToSK2piChannel::fillFinalState(FinalState *fs) {
58
59
60 // p pi+ -> S+ K+ pi+ pi- (1)
61 // p pi+ -> S+ K+ pi0 pi0 (1/4)
62 // p pi+ -> S0 K+ pi+ pi0 (1/2)
63 // p pi+ -> S- K+ pi+ pi+ (1/4)
64 // p pi+ -> S+ K0 pi+ pi0 (1)
65 // p pi+ -> S0 K0 pi+ pi+ (1/4)
66 //
67 // p pi0 -> S+ K+ pi0 pi- (1/2)
68 // p pi0 -> S0 K+ pi+ pi- (1/2)
69 // p pi0 -> S0 K+ pi0 pi0 (1/4)
70 // p pi0 -> S- K+ pi+ pi0 (1/4)
71 // p pi0 -> S+ K0 pi+ pi- (1)
72 // p pi0 -> S+ K0 pi0 pi0 (1/4)
73 // p pi0 -> S0 K0 pi+ pi0 (1/4)
74 // p pi0 -> S- K0 pi+ pi+ (1/2)
75 //
76 // p pi- -> S+ K+ pi- pi- (1/4)
77 // p pi- -> S0 K+ pi0 pi- (1/2)
78 // p pi- -> S- K+ pi+ pi- (1/4)
79 // p pi- -> S- K+ pi0 pi0 (1/4)
80 // p pi- -> S+ K0 pi0 pi- (1/2)
81 // p pi- -> S0 K0 pi+ pi- (1)
82 // p pi- -> S0 K0 pi0 pi0 (1/2)
83 // p pi- -> S- K0 pi+ pi0 (1/2)
84
85 Particle *nucleon;
86 Particle *pion;
87
88
89 if(particle1->isNucleon()){
90 nucleon = particle1;
91 pion = particle2;
92 }
93 else{
94 nucleon = particle2;
95 pion = particle1;
96 }
97
98 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
99
100 const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(pion->getType());
101 G4double rdm = Random::shoot();
102
103 ParticleType KaonType;
104 ParticleType PionType;
105
106 if(iso == 3 || iso == -3){
107 if(rdm*13. < 4.){
108 KaonType = ParticleTable::getKaonType(iso/3);
109 PionType = ParticleTable::getPionType(-2*iso/3);
110 nucleon->setType(ParticleTable::getSigmaType(2*iso/3));
111 }
112 else if(rdm*13. < 5.){
113 KaonType = ParticleTable::getKaonType(iso/3);
114 PionType = PiZero;
115 pion->setType(PiZero);
116 nucleon->setType(ParticleTable::getSigmaType(2*iso/3));
117 }
118 else if(rdm*13. < 7.){
119 KaonType = ParticleTable::getKaonType(iso/3);
120 PionType = PiZero;
121 nucleon->setType(SigmaZero);
122 }
123 else if(rdm*13. < 8.){
124 KaonType = ParticleTable::getKaonType(iso/3);
125 PionType = ParticleTable::getPionType(2*iso/3);
126 nucleon->setType(ParticleTable::getSigmaType(-2*iso/3));
127 }
128 else if(rdm*13. < 12.){
129 KaonType = ParticleTable::getKaonType(-iso/3);
130 PionType = PiZero;
131 nucleon->setType(ParticleTable::getSigmaType(2*iso/3));
132 }
133 else{
134 KaonType = ParticleTable::getKaonType(-iso/3);
135 PionType = ParticleTable::getPionType(2*iso/3);
136 nucleon->setType(SigmaZero);
137 }
138 }
139 else if(pion->getType() == PiZero){
140 if(rdm*14. < 2.){
141 KaonType = ParticleTable::getKaonType(iso);
142 PionType = ParticleTable::getPionType(-2*iso);
143 nucleon->setType(ParticleTable::getSigmaType(2*iso));
144 }
145 else if(rdm*14. < 4.){
146 KaonType = ParticleTable::getKaonType(iso);
147 PionType = ParticleTable::getPionType(-2*iso);
148 nucleon->setType(SigmaZero);
149 pion->setType(ParticleTable::getPionType(2*iso));
150 }
151 else if(rdm*14. < 5.){
152 KaonType = ParticleTable::getKaonType(iso);
153 PionType = PiZero;
154 nucleon->setType(SigmaZero);
155 }
156 else if(rdm*14. < 6.){
157 KaonType = ParticleTable::getKaonType(iso);
158 PionType = ParticleTable::getPionType(2*iso);
159 nucleon->setType(ParticleTable::getSigmaType(-2*iso));
160 }
161 else if(rdm*14. < 10.){
162 KaonType = ParticleTable::getKaonType(-iso);
163 PionType = ParticleTable::getPionType(-2*iso);
164 nucleon->setType(ParticleTable::getSigmaType(2*iso));
165 pion->setType(ParticleTable::getPionType(2*iso));
166 }
167 else if(rdm*14. < 11.){
168 KaonType = ParticleTable::getKaonType(-iso);
169 PionType = PiZero;
170 nucleon->setType(ParticleTable::getSigmaType(2*iso));
171 }
172 else if(rdm*14. < 12.){
173 KaonType = ParticleTable::getKaonType(-iso);
174 PionType = ParticleTable::getPionType(2*iso);
175 nucleon->setType(SigmaZero);
176 }
177 else{
178 KaonType = ParticleTable::getKaonType(-iso);
179 PionType = ParticleTable::getPionType(2*iso);
180 nucleon->setType(ParticleTable::getSigmaType(-2*iso));
181 pion->setType(ParticleTable::getPionType(2*iso));
182 }
183 }
184 else{
185 if(rdm*15. < 1.){
186 KaonType = ParticleTable::getKaonType(-iso);
187 PionType = ParticleTable::getPionType(2*iso);
188 nucleon->setType(ParticleTable::getSigmaType(-2*iso));
189 }
190 else if(rdm*15. < 3.){
191 KaonType = ParticleTable::getKaonType(-iso);
192 PionType = PiZero;
193 nucleon->setType(SigmaZero);
194 }
195 else if(rdm*15. < 4.){
196 KaonType = ParticleTable::getKaonType(-iso);
197 PionType = ParticleTable::getPionType(-2*iso);
198 nucleon->setType(ParticleTable::getSigmaType(2*iso));
199 }
200 else if(rdm*15. < 5.){
201 KaonType = ParticleTable::getKaonType(-iso);
202 PionType = PiZero;
203 nucleon->setType(ParticleTable::getSigmaType(2*iso));
204 pion->setType(PiZero);
205 }
206 else if(rdm*15. < 7.){
207 KaonType = ParticleTable::getKaonType(iso);
208 PionType = PiZero;
209 nucleon->setType(ParticleTable::getSigmaType(-2*iso));
210 }
211 else if(rdm*15. < 11.){
212 KaonType = ParticleTable::getKaonType(iso);
213 PionType = ParticleTable::getPionType(-2*iso);
214 nucleon->setType(SigmaZero);
215 }
216 else if(rdm*15. < 13.){
217 KaonType = ParticleTable::getKaonType(iso);
218 PionType = PiZero;
219 nucleon->setType(SigmaZero);
220 pion->setType(PiZero);
221 }
222 else{
223 KaonType = ParticleTable::getKaonType(iso);
224 PionType = ParticleTable::getPionType(-2*iso);
225 nucleon->setType(ParticleTable::getSigmaType(2*iso));
226 pion->setType(PiZero);
227 }
228 }
229
230 #ifdef INCLXX_IN_GEANT4_MODE
231 // Erase the parent resonance information of the nucleon and pion
232 nucleon->setParentResonancePDGCode(0);
233 nucleon->setParentResonanceID(0);
234 pion->setParentResonancePDGCode(0);
235 pion->setParentResonanceID(0);
236 #endif
237
238 ParticleList list;
239 list.push_back(nucleon);
240 list.push_back(pion);
241 const ThreeVector &rcol1 = nucleon->getPosition();
242 const ThreeVector &rcol2 = pion->getPosition();
243 const ThreeVector zero;
244 Particle *kaon = new Particle(KaonType,zero,rcol1);
245 Particle *pion2 = new Particle(PionType,zero,rcol2);
246 list.push_back(kaon);
247 list.push_back(pion2);
248
249 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
250
251 INCL_DEBUG("NpiToSK2pi " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
252
253 fs->addModifiedParticle(nucleon);
254 fs->addModifiedParticle(pion);
255 fs->addCreatedParticle(kaon);
256 fs->addCreatedParticle(pion2);
257
258 }
259 }
260