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25 // 25 //
26 // INCL++ intra-nuclear cascade model 26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France 27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium 28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France 29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and H 30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France 31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France 32 // Davide Mancusi, CEA-Saclay, France
33 // 33 //
34 #define INCLXX_IN_GEANT4_MODE 1 34 #define INCLXX_IN_GEANT4_MODE 1
35 35
36 #include "globals.hh" 36 #include "globals.hh"
37 37
38 #include "G4INCLPiNToMultiPionsChannel.hh" 38 #include "G4INCLPiNToMultiPionsChannel.hh"
39 #include "G4INCLKinematicsUtils.hh" 39 #include "G4INCLKinematicsUtils.hh"
40 #include "G4INCLBinaryCollisionAvatar.hh" 40 #include "G4INCLBinaryCollisionAvatar.hh"
41 #include "G4INCLRandom.hh" 41 #include "G4INCLRandom.hh"
42 #include "G4INCLGlobals.hh" 42 #include "G4INCLGlobals.hh"
43 #include "G4INCLLogger.hh" 43 #include "G4INCLLogger.hh"
44 #include <algorithm> 44 #include <algorithm>
45 #include "G4INCLPhaseSpaceGenerator.hh" 45 #include "G4INCLPhaseSpaceGenerator.hh"
46 46
47 namespace G4INCL { 47 namespace G4INCL {
48 48
49 const G4double PiNToMultiPionsChannel::angul 49 const G4double PiNToMultiPionsChannel::angularSlope = 15.;
50 50
51 PiNToMultiPionsChannel::PiNToMultiPionsChann 51 PiNToMultiPionsChannel::PiNToMultiPionsChannel(const G4int npi, Particle *p1, Particle *p2)
52 : npion(npi), 52 : npion(npi),
53 ind2(0), 53 ind2(0),
54 particle1(p1), 54 particle1(p1),
55 particle2(p2) 55 particle2(p2)
56 { 56 {
57 std::fill(isosp, isosp+4, 0); 57 std::fill(isosp, isosp+4, 0);
58 } 58 }
59 59
60 PiNToMultiPionsChannel::~PiNToMultiPionsChan 60 PiNToMultiPionsChannel::~PiNToMultiPionsChannel(){
61 61
62 } 62 }
63 63
64 void PiNToMultiPionsChannel::fillFinalState( 64 void PiNToMultiPionsChannel::fillFinalState(FinalState *fs) {
65 65
66 // assert(npion > 1 && npion < 5); 66 // assert(npion > 1 && npion < 5);
67 67
68 Particle * nucleon; 68 Particle * nucleon;
69 Particle * pion; 69 Particle * pion;
70 if(particle1->isNucleon()) { 70 if(particle1->isNucleon()) {
71 nucleon = particle1; 71 nucleon = particle1;
72 pion = particle2; 72 pion = particle2;
73 } else { 73 } else {
74 nucleon = particle2; 74 nucleon = particle2;
75 pion = particle1; 75 pion = particle1;
76 } 76 }
77 #ifdef INCLXX_IN_GEANT4_MODE <<
78 // Erase the parent resonance information <<
79 nucleon->setParentResonancePDGCode(0); <<
80 nucleon->setParentResonanceID(0); <<
81 pion->setParentResonancePDGCode(0); <<
82 pion->setParentResonanceID(0); <<
83 #endif <<
84 G4int ipi=ParticleTable::getIsospin(pion 77 G4int ipi=ParticleTable::getIsospin(pion->getType());
85 ind2=ParticleTable::getIsospin(nucleon-> 78 ind2=ParticleTable::getIsospin(nucleon->getType());
86 79
87 ParticleList list; 80 ParticleList list;
88 list.push_back(nucleon); 81 list.push_back(nucleon);
89 list.push_back(pion); 82 list.push_back(pion);
90 fs->addModifiedParticle(nucleon); 83 fs->addModifiedParticle(nucleon);
91 fs->addModifiedParticle(pion); 84 fs->addModifiedParticle(pion);
92 85
93 isospinRepartition(ipi); 86 isospinRepartition(ipi);
94 87
95 const ParticleType tn=ParticleTable::get 88 const ParticleType tn=ParticleTable::getNucleonType(ind2);
96 nucleon->setType(tn); 89 nucleon->setType(tn);
97 ParticleType pionType=ParticleTable::get 90 ParticleType pionType=ParticleTable::getPionType(isosp[0]);
98 pion->setType(pionType); 91 pion->setType(pionType);
99 const ThreeVector &rcolpion = pion->getP 92 const ThreeVector &rcolpion = pion->getPosition();
100 const ThreeVector zero; 93 const ThreeVector zero;
101 for(G4int i=1; i<npion; ++i) { 94 for(G4int i=1; i<npion; ++i) {
102 pionType=ParticleTable::getPionType(is 95 pionType=ParticleTable::getPionType(isosp[i]);
103 Particle *newPion = new Particle(pionT 96 Particle *newPion = new Particle(pionType,zero,rcolpion);
104 newPion->setType(pionType); 97 newPion->setType(pionType);
105 list.push_back(newPion); 98 list.push_back(newPion);
106 fs->addCreatedParticle(newPion); 99 fs->addCreatedParticle(newPion);
107 } 100 }
108 101
109 const G4double sqrtS = KinematicsUtils:: 102 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
110 PhaseSpaceGenerator::generateBiased(sqrt 103 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
111 104
112 } 105 }
113 106
114 void PiNToMultiPionsChannel::isospinRepart 107 void PiNToMultiPionsChannel::isospinRepartition(G4int ipi) {
115 G4double rjcd=Random::shoot(); 108 G4double rjcd=Random::shoot();
116 const G4int itot=ipi*ind2; 109 const G4int itot=ipi*ind2;
117 110
118 isosp[1]=ipi; 111 isosp[1]=ipi;
119 if (npion != 3) { 112 if (npion != 3) {
120 if (npion == 4){ 113 if (npion == 4){
121 const G4double r2 = Random::shoo 114 const G4double r2 = Random::shoot();
122 if (r2*3. > 2.) { 115 if (r2*3. > 2.) {
123 isosp[2]= 0; 116 isosp[2]= 0;
124 isosp[3]= 0; 117 isosp[3]= 0;
125 } 118 }
126 else { 119 else {
127 isosp[2]= 2; 120 isosp[2]= 2;
128 isosp[3]= -2; 121 isosp[3]= -2;
129 } 122 }
130 } 123 }
131 124
132 if (itot == 2) { 125 if (itot == 2) {
133 // CAS PI+ P ET PI- n 126 // CAS PI+ P ET PI- n
134 rjcd *= 5.; 127 rjcd *= 5.;
135 if (rjcd > 3.) { 128 if (rjcd > 3.) {
136 // PI+ PI+ N ET PI- P 129 // PI+ PI+ N ET PI- PI- P
137 isosp[0]=2*ind2; 130 isosp[0]=2*ind2;
138 isosp[1]=ipi; 131 isosp[1]=ipi;
139 ind2=-ind2; 132 ind2=-ind2;
140 } 133 }
141 else { 134 else {
142 // PI+ PI0 P ET PI- P 135 // PI+ PI0 P ET PI- PI0 N
143 isosp[0]=0; 136 isosp[0]=0;
144 isosp[1]=ipi; 137 isosp[1]=ipi;
145 } 138 }
146 } 139 }
147 else if (itot == 0) { 140 else if (itot == 0) {
148 // CAS PI0 P ET PI0 N 141 // CAS PI0 P ET PI0 N
149 rjcd *= 90.; 142 rjcd *= 90.;
150 if (rjcd > 13.) { 143 if (rjcd > 13.) {
151 if (rjcd > 52.) { 144 if (rjcd > 52.) {
152 // PI+ PI0 N ET PI 145 // PI+ PI0 N ET PI- PI0 P
153 isosp[0]=2*ind2; 146 isosp[0]=2*ind2;
154 isosp[1]=0; 147 isosp[1]=0;
155 ind2=-ind2; 148 ind2=-ind2;
156 } 149 }
157 else { 150 else {
158 // PI+ PI- P ET PI 151 // PI+ PI- P ET PI+ PI- N
159 isosp[1]=-2; 152 isosp[1]=-2;
160 isosp[0]=2; 153 isosp[0]=2;
161 } 154 }
162 } 155 }
163 else { 156 else {
164 // PI0 PI0 P ET PI0 PI 157 // PI0 PI0 P ET PI0 PI0 N
165 isosp[0]=0; 158 isosp[0]=0;
166 isosp[1]=0; 159 isosp[1]=0;
167 } 160 }
168 } 161 }
169 else if (itot == -2) { 162 else if (itot == -2) {
170 // CAS PI- P ET PI+ N 163 // CAS PI- P ET PI+ N
171 rjcd *= 45.; 164 rjcd *= 45.;
172 if (rjcd > 17.) { 165 if (rjcd > 17.) {
173 if (rjcd > 24.) { 166 if (rjcd > 24.) {
174 // PI+ PI- N ET PI 167 // PI+ PI- N ET PI+ PI- P
175 isosp[0]=2*ind2; 168 isosp[0]=2*ind2;
176 ind2=-ind2; 169 ind2=-ind2;
177 } 170 }
178 else { 171 else {
179 // PI0 PI0 N ET PI 172 // PI0 PI0 N ET PI0 PI0 P
180 isosp[0]=0; 173 isosp[0]=0;
181 isosp[1]=0; 174 isosp[1]=0;
182 ind2=-ind2; 175 ind2=-ind2;
183 } 176 }
184 } 177 }
185 else 178 else
186 // PI- PI0 P ET PI+ PI 179 // PI- PI0 P ET PI+ PI0 N
187 isosp[0]=0; 180 isosp[0]=0;
188 } 181 }
189 } // if (npion != 3) 182 } // if (npion != 3)
190 else { 183 else {
191 // PI N -> PI PI PI N 184 // PI N -> PI PI PI N
192 // IF (IPI*IND2) 20,21,22 185 // IF (IPI*IND2) 20,21,22
193 if (itot == -2) { 186 if (itot == -2) {
194 // CAS PI- P ET PI+ N 187 // CAS PI- P ET PI+ N
195 rjcd *= 135.; 188 rjcd *= 135.;
196 if (rjcd <= 28.) { 189 if (rjcd <= 28.) {
197 // PI0 PI0 PI0 N ET PI 190 // PI0 PI0 PI0 N ET PI0 PI0 PI0 P
198 isosp[0]=0; 191 isosp[0]=0;
199 isosp[1]=0; 192 isosp[1]=0;
200 isosp[2]=0; 193 isosp[2]=0;
201 ind2=-ind2; 194 ind2=-ind2;
202 } 195 }
203 else { 196 else {
204 if (rjcd <= 84.) { 197 if (rjcd <= 84.) {
205 // PI+ PI- PI0 N E 198 // PI+ PI- PI0 N ET PI- PI+ PI0 P
206 isosp[0]=2*ind2; 199 isosp[0]=2*ind2;
207 isosp[2]=0; 200 isosp[2]=0;
208 ind2=-ind2; 201 ind2=-ind2;
209 } 202 }
210 else { 203 else {
211 if (rjcd <= 118.) { 204 if (rjcd <= 118.) {
212 // PI- PI- PI+ 205 // PI- PI- PI+ P ET PI- PI+ PI+ N
213 isosp[0]=ipi; 206 isosp[0]=ipi;
214 isosp[2]=-ipi; 207 isosp[2]=-ipi;
215 } 208 }
216 else { 209 else {
217 // PI- PI0 PI0 210 // PI- PI0 PI0 P ET PI0 PI0 PI+ N
218 isosp[0]=0; 211 isosp[0]=0;
219 isosp[2]=0; 212 isosp[2]=0;
220 } 213 }
221 } 214 }
222 } 215 }
223 } 216 }
224 else if (itot == 0) { 217 else if (itot == 0) {
225 // CAS PI0 P ET PI0 N 218 // CAS PI0 P ET PI0 N
226 rjcd *= 270.; 219 rjcd *= 270.;
227 if (rjcd <= 39.) { 220 if (rjcd <= 39.) {
228 // PI0 PI0 PI0 P ET PI 221 // PI0 PI0 PI0 P ET PI0 PI0 PI0 N
229 isosp[0]=0; 222 isosp[0]=0;
230 isosp[2]=0; 223 isosp[2]=0;
231 } 224 }
232 else { 225 else {
233 if (rjcd <= 156.) { 226 if (rjcd <= 156.) {
234 // PI+ PI- PI0 P E 227 // PI+ PI- PI0 P ET PI- PI+ PI0 N
235 isosp[0]=2; 228 isosp[0]=2;
236 isosp[2]=-2; 229 isosp[2]=-2;
237 } 230 }
238 else { 231 else {
239 if (rjcd <= 194.) { 232 if (rjcd <= 194.) {
240 // PI+ PI0 PI0 233 // PI+ PI0 PI0 N ET PI0 PI0 PI- P
241 isosp[0]=0; 234 isosp[0]=0;
242 isosp[2]=2*ind2; 235 isosp[2]=2*ind2;
243 ind2=-ind2; 236 ind2=-ind2;
244 } 237 }
245 else { 238 else {
246 // PI- PI+ PI+ 239 // PI- PI+ PI+ N ET PI- PI- PI+ P
247 isosp[0]=2*ind2; 240 isosp[0]=2*ind2;
248 isosp[1]=2*ind2; 241 isosp[1]=2*ind2;
249 isosp[2]=-2*ind2; 242 isosp[2]=-2*ind2;
250 ind2=-ind2; 243 ind2=-ind2;
251 } 244 }
252 } 245 }
253 } 246 }
254 } 247 }
255 else if (itot == 2) { 248 else if (itot == 2) {
256 // CAS PI+ P ET PI- N 249 // CAS PI+ P ET PI- N
257 rjcd *= 5.; 250 rjcd *= 5.;
258 if (rjcd <= 2.) { 251 if (rjcd <= 2.) {
259 // PI+ P PI0 PI0 ET PI 252 // PI+ P PI0 PI0 ET PI- N PI0 PI0
260 isosp[0]=0; 253 isosp[0]=0;
261 isosp[2]=0; 254 isosp[2]=0;
262 } 255 }
263 else { 256 else {
264 if (rjcd <= 3.) { 257 if (rjcd <= 3.) {
265 // PI+ P PI+ PI- E 258 // PI+ P PI+ PI- ET PI- N PI+ PI-
266 isosp[0]=-2; 259 isosp[0]=-2;
267 isosp[2]=2; 260 isosp[2]=2;
268 } 261 }
269 else { 262 else {
270 // PI+ N PI+ PI0 E 263 // PI+ N PI+ PI0 ET PI- P PI0 PI-
271 isosp[0]=2*ind2; 264 isosp[0]=2*ind2;
272 isosp[2]=0; 265 isosp[2]=0;
273 ind2=-ind2; 266 ind2=-ind2;
274 } 267 }
275 } 268 }
276 } 269 }
277 } 270 }
278 271
279 std::shuffle(isosp,isosp+npion,Random: << 272 std::random_shuffle(isosp,isosp+npion,Random::getAdapter()); // isospin randomly distributed
280 } 273 }
281 274
282 } 275 }
283 276