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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 "G4INCLNDeltaToNSKChannel.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 NDeltaToNSKChannel::angularSlope = 2.;
50
51 NDeltaToNSKChannel::NDeltaToNSKChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NDeltaToNSKChannel::~NDeltaToNSKChannel(){}
56
57 void NDeltaToNSKChannel::fillFinalState(FinalState *fs) {
58 // D++ p -> p S+ K+ (6)
59 //
60 // D++ n -> p S+ K0 (3)
61 // D++ n -> p S0 K+ (3)
62 // D++ n -> n S+ K+ (3)
63 //
64 // D+ p -> p S+ K0 (2)
65 // D+ p -> p S0 K+ (2)
66 // D+ p -> n S+ K+ (3)
67 //
68 // D+ n -> p S0 K0 (3)
69 // D+ n -> p S- K+ (2)
70 // D+ n -> n S+ K0 (2)
71 // D+ n -> n S0 K+ (2)
72
73
74 Particle *delta;
75
76 if (particle1->isResonance()) {
77 delta = particle1;
78 }
79 else {
80 delta = particle2;
81 }
82
83 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(particle1, particle2);
84
85 const G4int iso = ParticleTable::getIsospin(particle1->getType()) + ParticleTable::getIsospin(particle2->getType());
86 const G4int iso_d = ParticleTable::getIsospin(delta->getType());
87
88 ParticleType KaonType;
89 ParticleType NucleonType;
90 ParticleType SigmaType;
91
92 const G4double rdm = Random::shoot();
93
94 if(std::abs(iso) == 4){// D++ p
95 KaonType = ParticleTable::getKaonType(iso/4);
96 NucleonType = ParticleTable::getNucleonType(iso/4);
97 SigmaType = ParticleTable::getSigmaType(iso/2);
98 }
99 else if(iso == 0){// D+ n
100 if(rdm*9 < 3){
101 KaonType = ParticleTable::getKaonType(-iso_d);
102 NucleonType = ParticleTable::getNucleonType(iso_d);
103 SigmaType = SigmaZero;
104 }
105 else if(rdm*9 < 5){
106 KaonType = ParticleTable::getKaonType(iso_d);
107 NucleonType = ParticleTable::getNucleonType(iso_d);
108 SigmaType = ParticleTable::getSigmaType(-2*iso_d);
109 }
110 else if(rdm*9 < 7){
111 KaonType = ParticleTable::getKaonType(-iso_d);
112 NucleonType = ParticleTable::getNucleonType(-iso_d);
113 SigmaType = ParticleTable::getSigmaType(2*iso_d);
114 }
115 else{
116 KaonType = ParticleTable::getKaonType(iso_d);
117 NucleonType = ParticleTable::getNucleonType(-iso_d);
118 SigmaType = SigmaZero;
119 }
120 }
121 else if(ParticleTable::getIsospin(particle1->getType()) == ParticleTable::getIsospin(particle2->getType())){// D+ p
122 if(rdm*7 < 2){
123 KaonType = ParticleTable::getKaonType(-iso/2);
124 NucleonType = ParticleTable::getNucleonType(iso/2);
125 SigmaType = ParticleTable::getSigmaType(iso);
126 }
127 else if(rdm*7 < 4){
128 KaonType = ParticleTable::getKaonType(iso/2);
129 NucleonType = ParticleTable::getNucleonType(iso/2);
130 SigmaType = SigmaZero;
131 }
132 else{
133 KaonType = ParticleTable::getKaonType(iso/2);
134 NucleonType = ParticleTable::getNucleonType(-iso/2);
135 SigmaType = ParticleTable::getSigmaType(iso);
136 }
137 }
138 else{// D++ n
139 if(rdm*3 < 1){
140 KaonType = ParticleTable::getKaonType(-iso/2);
141 NucleonType = ParticleTable::getNucleonType(iso/2);
142 SigmaType = ParticleTable::getSigmaType(iso);
143 }
144 else if(rdm*3 < 2){
145 KaonType = ParticleTable::getKaonType(iso/2);
146 NucleonType = ParticleTable::getNucleonType(iso/2);
147 SigmaType = SigmaZero;
148 }
149 else{
150 KaonType = ParticleTable::getKaonType(iso/2);
151 NucleonType = ParticleTable::getNucleonType(-iso/2);
152 SigmaType = ParticleTable::getSigmaType(iso);
153 }
154 }
155
156 particle1->setType(NucleonType);
157 particle2->setType(SigmaType);
158
159 ParticleList list;
160 list.push_back(particle1);
161 list.push_back(particle2);
162 const ThreeVector &rcol = particle2->getPosition();
163 const ThreeVector zero;
164 Particle *kaon = new Particle(KaonType,zero,rcol);
165 list.push_back(kaon);
166
167 if(Random::shoot()<0.5) PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
168 else PhaseSpaceGenerator::generateBiased(sqrtS, list, 1, angularSlope);
169
170 fs->addModifiedParticle(particle1);
171 fs->addModifiedParticle(particle2);
172 fs->addCreatedParticle(kaon);
173
174 }
175 }
176