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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 "G4INCLNDeltaToDeltaSKChannel.hh" 38 #include "G4INCLNDeltaToDeltaSKChannel.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 NDeltaToDeltaSKChannel::angul 49 const G4double NDeltaToDeltaSKChannel::angularSlope = 2.;
50 50
51 NDeltaToDeltaSKChannel::NDeltaToDeltaSKChann 51 NDeltaToDeltaSKChannel::NDeltaToDeltaSKChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2) 52 : particle1(p1), particle2(p2)
53 {} 53 {}
54 54
55 NDeltaToDeltaSKChannel::~NDeltaToDeltaSKChan 55 NDeltaToDeltaSKChannel::~NDeltaToDeltaSKChannel(){}
56 56
57 G4double NDeltaToDeltaSKChannel::sampleDelta 57 G4double NDeltaToDeltaSKChannel::sampleDeltaMass(G4double ecm) {
58 const G4double maxDeltaMass = ecm - Partic 58 const G4double maxDeltaMass = ecm - ParticleTable::effectiveSigmaMass - ParticleTable::effectiveKaonMass - 1.0;
59 const G4double maxDeltaMassRndm = std::ata 59 const G4double maxDeltaMassRndm = std::atan((maxDeltaMass-ParticleTable::effectiveDeltaMass)*2./ParticleTable::effectiveDeltaWidth); // atan((mass-1232)*2/130)
60 const G4double deltaMassRndmRange = maxDel 60 const G4double deltaMassRndmRange = maxDeltaMassRndm - ParticleTable::minDeltaMassRndm; // atan
61 // assert(deltaMassRndmRange>0.); 61 // assert(deltaMassRndmRange>0.);
62 62
63 G4double y=ecm*ecm; 63 G4double y=ecm*ecm;
64 G4double q2=(y-1.157776E6)*(y-6.4E5)/y/4.0 64 G4double q2=(y-1.157776E6)*(y-6.4E5)/y/4.0; // 1.157776E6 = 1076^2 = (mNucleon + mPion)^2, 6.4E5 = 800^2 = (mNucleon - mPion)^2 // (prc56(1997)2431) (eq 3.7)^2
65 G4double q3=std::pow(std::sqrt(q2), 3.); 65 G4double q3=std::pow(std::sqrt(q2), 3.);
66 const G4double f3max=q3/(q3+5.832E6); // 5 66 const G4double f3max=q3/(q3+5.832E6); // 5.832E6 = 180^3 = cut_parameter^3 // (prc56(1997)2431) (cf eq 3.6)
67 G4double x; 67 G4double x;
68 68
69 G4int nTries = 0; 69 G4int nTries = 0;
70 G4bool success = false; 70 G4bool success = false;
71 while(!success) { /* Loop checking, 10.07. 71 while(!success) { /* Loop checking, 10.07.2015, D.Mancusi */
72 if(++nTries >= 100000) { 72 if(++nTries >= 100000) {
73 INCL_WARN("NDeltaToDeltaSKChannel::sam 73 INCL_WARN("NDeltaToDeltaSKChannel::sampleDeltaMass loop was stopped because maximum number of tries was reached. Minimum delta mass "
74 << ParticleTable::minDeltaMass < 74 << ParticleTable::minDeltaMass << " MeV with CM energy " << ecm << " MeV may be unphysical." << '\n');
75 return ParticleTable::minDeltaMass; 75 return ParticleTable::minDeltaMass;
76 } 76 }
77 77
78 G4double rndm = ParticleTable::minDeltaM 78 G4double rndm = ParticleTable::minDeltaMassRndm + Random::shoot() * deltaMassRndmRange; // atan in order to avec a distribution in 1/(1+x^2)
79 y = std::tan(rndm); // (mass-1232)*2/130 79 y = std::tan(rndm); // (mass-1232)*2/130
80 x = ParticleTable::effectiveDeltaMass + 80 x = ParticleTable::effectiveDeltaMass + 0.5*ParticleTable::effectiveDeltaWidth*y; // probability to have the mass M = 1/(1+(M-1232)^2)/Pi cut with min and max mass
81 // assert(x>=ParticleTable::minDeltaMass && ec 81 // assert(x>=ParticleTable::minDeltaMass && ecm >= x + ParticleTable::effectiveSigmaMass + ParticleTable::effectiveKaonMass + 1.0);
82 82
83 // generation of the delta mass with the 83 // generation of the delta mass with the penetration factor
84 // (see prc56(1997)2431) 84 // (see prc56(1997)2431)
85 y=x*x; 85 y=x*x;
86 q2=(y-1.157776E6)*(y-6.4E5)/y/4.0; // 1. 86 q2=(y-1.157776E6)*(y-6.4E5)/y/4.0; // 1.157776E6 = 1076^2 = (mNucleon + mPion)^2, 6.4E5 = 800^2 = (mNucleon - mPion)^2 // (prc56(1997)2431) (eq 3.7)^2
87 q3=std::pow(std::sqrt(q2), 3.); 87 q3=std::pow(std::sqrt(q2), 3.);
88 const G4double f3=q3/(q3+5.832E6); // 5. 88 const G4double f3=q3/(q3+5.832E6); // 5.832E6 = 180^3 = cut_parameter^3 // (prc56(1997)2431) (eq 3.6)
89 rndm = Random::shoot(); 89 rndm = Random::shoot();
90 if (rndm*f3max < f3) success = true; // 90 if (rndm*f3max < f3) success = true; // promoting high masses
91 } 91 }
92 return x; 92 return x;
93 } 93 }
94 94
95 void NDeltaToDeltaSKChannel::fillFinalState( 95 void NDeltaToDeltaSKChannel::fillFinalState(FinalState *fs) {
96 // 96 //
97 // D++ p -> S+ K+ D+ (2) 97 // D++ p -> S+ K+ D+ (2)
98 // D++ p -> S0 K+ D++ (1) 98 // D++ p -> S0 K+ D++ (1)
99 // D++ p -> S+ K0 D++ (6) 99 // D++ p -> S+ K0 D++ (6)
100 // 100 //
101 // D++ n -> S+ K+ D0 (2) 101 // D++ n -> S+ K+ D0 (2)
102 // D++ n -> S0 K+ D+ (4) 102 // D++ n -> S0 K+ D+ (4)
103 // D++ n -> S- K+ D++ (6) 103 // D++ n -> S- K+ D++ (6)
104 // D++ n -> S+ K0 D+ (2) 104 // D++ n -> S+ K0 D+ (2)
105 // D++ n -> S0 K0 D++ (1) 105 // D++ n -> S0 K0 D++ (1)
106 // 106 //
107 // D+ p -> S+ K+ D0 (2) 107 // D+ p -> S+ K+ D0 (2)
108 // D+ p -> S0 K+ D+ (1) 108 // D+ p -> S0 K+ D+ (1)
109 // D+ p -> S- K+ D++ (2) 109 // D+ p -> S- K+ D++ (2)
110 // D+ p -> S+ K0 D+ (2) 110 // D+ p -> S+ K0 D+ (2)
111 // D+ p -> S0 K0 D++ (4) 111 // D+ p -> S0 K0 D++ (4)
112 // 112 //
113 // D+ n -> S+ K+ D- (2) 113 // D+ n -> S+ K+ D- (2)
114 // D+ n -> S0 K+ D0 (4) 114 // D+ n -> S0 K+ D0 (4)
115 // D+ n -> S- K+ D+ (2) 115 // D+ n -> S- K+ D+ (2)
116 // D+ n -> S+ K0 D0 (2) 116 // D+ n -> S+ K0 D0 (2)
117 // D+ n -> S0 K0 D+ (1) 117 // D+ n -> S0 K0 D+ (1)
118 // D+ n -> S- K0 D++ (2) 118 // D+ n -> S- K0 D++ (2)
119 119
120 120
121 Particle *delta; 121 Particle *delta;
122 122
123 if (particle1->isResonance()) { 123 if (particle1->isResonance()) {
124 delta = particle1; 124 delta = particle1;
125 } 125 }
126 else { 126 else {
127 delta = particle2; 127 delta = particle2;
128 } 128 }
129 129
130 const G4double sqrtS = KinematicsUtils::to 130 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(particle1, particle2);
131 131
132 const G4int iso = ParticleTable::getIsospi 132 const G4int iso = ParticleTable::getIsospin(particle1->getType()) + ParticleTable::getIsospin(particle2->getType());
133 const G4int iso_d = ParticleTable::getIsos 133 const G4int iso_d = ParticleTable::getIsospin(delta->getType());
134 134
135 ParticleType KaonType; 135 ParticleType KaonType;
136 ParticleType DeltaType; 136 ParticleType DeltaType;
137 ParticleType SigmaType; 137 ParticleType SigmaType;
138 138
139 const G4double rdm = Random::shoot(); 139 const G4double rdm = Random::shoot();
140 140
141 if(std::abs(iso) == 4){// D++ p 141 if(std::abs(iso) == 4){// D++ p
142 if(rdm*9 < 2){ 142 if(rdm*9 < 2){
143 KaonType = ParticleTable::getKaonType( 143 KaonType = ParticleTable::getKaonType(iso/4);
144 DeltaType = ParticleTable::getDeltaTyp 144 DeltaType = ParticleTable::getDeltaType(iso/4);
145 SigmaType = ParticleTable::getSigmaTyp 145 SigmaType = ParticleTable::getSigmaType(iso/2);
146 } 146 }
147 else if(rdm*9 < 3){ 147 else if(rdm*9 < 3){
148 KaonType = ParticleTable::getKaonType( 148 KaonType = ParticleTable::getKaonType(iso/4);
149 DeltaType = ParticleTable::getDeltaTyp 149 DeltaType = ParticleTable::getDeltaType(3*iso/4);
150 SigmaType = SigmaZero; 150 SigmaType = SigmaZero;
151 } 151 }
152 else{ 152 else{
153 KaonType = ParticleTable::getKaonType( 153 KaonType = ParticleTable::getKaonType(-iso/4);
154 DeltaType = ParticleTable::getDeltaTyp 154 DeltaType = ParticleTable::getDeltaType(3*iso/4);
155 SigmaType = ParticleTable::getSigmaTyp 155 SigmaType = ParticleTable::getSigmaType(iso/2);
156 } 156 }
157 } 157 }
158 else if(iso == 0){// D+ n 158 else if(iso == 0){// D+ n
159 if(rdm*13 < 2){ 159 if(rdm*13 < 2){
160 KaonType = ParticleTable::getKaonType( 160 KaonType = ParticleTable::getKaonType(iso_d);
161 DeltaType = ParticleTable::getDeltaTyp 161 DeltaType = ParticleTable::getDeltaType(-3*iso_d);
162 SigmaType = ParticleTable::getSigmaTyp 162 SigmaType = ParticleTable::getSigmaType(2*iso_d);
163 } 163 }
164 else if(rdm*13 < 6){ 164 else if(rdm*13 < 6){
165 KaonType = ParticleTable::getKaonType( 165 KaonType = ParticleTable::getKaonType(iso_d);
166 DeltaType = ParticleTable::getDeltaTyp 166 DeltaType = ParticleTable::getDeltaType(-iso_d);
167 SigmaType = SigmaZero; 167 SigmaType = SigmaZero;
168 } 168 }
169 else if(rdm*13 < 8){ 169 else if(rdm*13 < 8){
170 KaonType = ParticleTable::getKaonType( 170 KaonType = ParticleTable::getKaonType(iso_d);
171 DeltaType = ParticleTable::getDeltaTyp 171 DeltaType = ParticleTable::getDeltaType(iso_d);
172 SigmaType = ParticleTable::getSigmaTyp 172 SigmaType = ParticleTable::getSigmaType(-2*iso_d);
173 } 173 }
174 else if(rdm*13 < 10){ 174 else if(rdm*13 < 10){
175 KaonType = ParticleTable::getKaonType( 175 KaonType = ParticleTable::getKaonType(-iso_d);
176 DeltaType = ParticleTable::getDeltaTyp 176 DeltaType = ParticleTable::getDeltaType(-iso_d);
177 SigmaType = ParticleTable::getSigmaTyp 177 SigmaType = ParticleTable::getSigmaType(2*iso_d);
178 } 178 }
179 else if(rdm*13 < 11){ 179 else if(rdm*13 < 11){
180 KaonType = ParticleTable::getKaonType( 180 KaonType = ParticleTable::getKaonType(-iso_d);
181 DeltaType = ParticleTable::getDeltaTyp 181 DeltaType = ParticleTable::getDeltaType(iso_d);
182 SigmaType = SigmaZero; 182 SigmaType = SigmaZero;
183 } 183 }
184 else{ 184 else{
185 KaonType = ParticleTable::getKaonType( 185 KaonType = ParticleTable::getKaonType(-iso_d);
186 DeltaType = ParticleTable::getDeltaTyp 186 DeltaType = ParticleTable::getDeltaType(3*iso_d);
187 SigmaType = ParticleTable::getSigmaTyp 187 SigmaType = ParticleTable::getSigmaType(-2*iso_d);
188 } 188 }
189 } 189 }
190 else if(ParticleTable::getIsospin(particle 190 else if(ParticleTable::getIsospin(particle1->getType()) == ParticleTable::getIsospin(particle2->getType())){// D+ p
191 if(rdm*11 < 2){ 191 if(rdm*11 < 2){
192 KaonType = ParticleTable::getKaonType( 192 KaonType = ParticleTable::getKaonType(iso/2);
193 DeltaType = ParticleTable::getDeltaTyp 193 DeltaType = ParticleTable::getDeltaType(-iso/2);
194 SigmaType = ParticleTable::getSigmaTyp 194 SigmaType = ParticleTable::getSigmaType(iso);
195 } 195 }
196 else if(rdm*11 < 3){ 196 else if(rdm*11 < 3){
197 KaonType = ParticleTable::getKaonType( 197 KaonType = ParticleTable::getKaonType(iso/2);
198 DeltaType = ParticleTable::getDeltaTyp 198 DeltaType = ParticleTable::getDeltaType(iso/2);
199 SigmaType = SigmaZero; 199 SigmaType = SigmaZero;
200 } 200 }
201 else if(rdm*11 < 5){ 201 else if(rdm*11 < 5){
202 KaonType = ParticleTable::getKaonType( 202 KaonType = ParticleTable::getKaonType(iso/2);
203 DeltaType = ParticleTable::getDeltaTyp 203 DeltaType = ParticleTable::getDeltaType(3*iso/2);
204 SigmaType = ParticleTable::getSigmaTyp 204 SigmaType = ParticleTable::getSigmaType(-iso);
205 } 205 }
206 else if(rdm*11 < 7){ 206 else if(rdm*11 < 7){
207 KaonType = ParticleTable::getKaonType( 207 KaonType = ParticleTable::getKaonType(-iso/2);
208 DeltaType = ParticleTable::getDeltaTyp 208 DeltaType = ParticleTable::getDeltaType(iso/2);
209 SigmaType = ParticleTable::getSigmaTyp 209 SigmaType = ParticleTable::getSigmaType(iso);
210 } 210 }
211 else{ 211 else{
212 KaonType = ParticleTable::getKaonType( 212 KaonType = ParticleTable::getKaonType(-iso/2);
213 DeltaType = ParticleTable::getDeltaTyp 213 DeltaType = ParticleTable::getDeltaType(3*iso/2);
214 SigmaType = SigmaZero; 214 SigmaType = SigmaZero;
215 } 215 }
216 } 216 }
217 else{// D++ n 217 else{// D++ n
218 if(rdm*15 < 2){ 218 if(rdm*15 < 2){
219 KaonType = ParticleTable::getKaonType( 219 KaonType = ParticleTable::getKaonType(iso/2);
220 DeltaType = ParticleTable::getDeltaTyp 220 DeltaType = ParticleTable::getDeltaType(-iso/2);
221 SigmaType = ParticleTable::getSigmaTyp 221 SigmaType = ParticleTable::getSigmaType(iso);
222 } 222 }
223 else if(rdm*15 < 6){ 223 else if(rdm*15 < 6){
224 KaonType = ParticleTable::getKaonType( 224 KaonType = ParticleTable::getKaonType(iso/2);
225 DeltaType = ParticleTable::getDeltaTyp 225 DeltaType = ParticleTable::getDeltaType(iso/2);
226 SigmaType = SigmaZero; 226 SigmaType = SigmaZero;
227 } 227 }
228 else if(rdm*15 < 12){ 228 else if(rdm*15 < 12){
229 KaonType = ParticleTable::getKaonType( 229 KaonType = ParticleTable::getKaonType(iso/2);
230 DeltaType = ParticleTable::getDeltaTyp 230 DeltaType = ParticleTable::getDeltaType(3*iso/2);
231 SigmaType = ParticleTable::getSigmaTyp 231 SigmaType = ParticleTable::getSigmaType(-iso);
232 } 232 }
233 else if(rdm*15 < 14){ 233 else if(rdm*15 < 14){
234 KaonType = ParticleTable::getKaonType( 234 KaonType = ParticleTable::getKaonType(-iso/2);
235 DeltaType = ParticleTable::getDeltaTyp 235 DeltaType = ParticleTable::getDeltaType(iso/2);
236 SigmaType = ParticleTable::getSigmaTyp 236 SigmaType = ParticleTable::getSigmaType(iso);
237 } 237 }
238 else{ 238 else{
239 KaonType = ParticleTable::getKaonType( 239 KaonType = ParticleTable::getKaonType(-iso/2);
240 DeltaType = ParticleTable::getDeltaTyp 240 DeltaType = ParticleTable::getDeltaType(3*iso/2);
241 SigmaType = SigmaZero; 241 SigmaType = SigmaZero;
242 } 242 }
243 } 243 }
244 244
245 245
246 particle1->setType(DeltaType); 246 particle1->setType(DeltaType);
247 particle1->setMass(sampleDeltaMass(sqrtS)) 247 particle1->setMass(sampleDeltaMass(sqrtS));
248 particle2->setType(SigmaType); 248 particle2->setType(SigmaType);
249 249
250 ParticleList list; 250 ParticleList list;
251 list.push_back(particle1); 251 list.push_back(particle1);
252 list.push_back(particle2); 252 list.push_back(particle2);
253 const ThreeVector &rcol = particle2->getPo 253 const ThreeVector &rcol = particle2->getPosition();
254 const ThreeVector zero; 254 const ThreeVector zero;
255 Particle *kaon = new Particle(KaonType,zer 255 Particle *kaon = new Particle(KaonType,zero,rcol);
256 list.push_back(kaon); 256 list.push_back(kaon);
257 257
258 if(Random::shoot()<0.5) PhaseSpaceGenerato 258 if(Random::shoot()<0.5) PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
259 else PhaseSpaceGenerator::generateBiased(s 259 else PhaseSpaceGenerator::generateBiased(sqrtS, list, 1, angularSlope);
260 260
261 fs->addModifiedParticle(particle1); 261 fs->addModifiedParticle(particle1);
262 fs->addModifiedParticle(particle2); 262 fs->addModifiedParticle(particle2);
263 fs->addCreatedParticle(kaon); 263 fs->addCreatedParticle(kaon);
264 264
265 } 265 }
266 } 266 }
267 267