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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 "G4INCLNDeltaToNNKKbChannel.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 NDeltaToNNKKbChannel::angularSlope = 2.;
50
51 NDeltaToNNKKbChannel::NDeltaToNNKKbChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NDeltaToNNKKbChannel::~NDeltaToNNKKbChannel(){}
56
57 void NDeltaToNNKKbChannel::fillFinalState(FinalState *fs) {
58
59 // ratio
60 // D++ p -> p p K+ K0b (6)
61 //
62 // D++ n -> p p K+ K- (3)
63 // D++ n -> p p K0 K0b (3)
64 // D++ n -> p n K+ K0b (3)
65 //
66 // D+ p -> p p K+ K- (3)
67 // D+ p -> p p K0 K0b (1)
68 // D+ p -> p n K+ K0b (3)
69 //
70 // D+ n -> p p K0 K- (2)
71 // D+ n -> p n K+ K- (1)
72 // D+ n -> p n K0 K0b (3)
73 // D+ n -> n n K+ K0b (2)
74 //
75
76 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(particle1, particle2);
77
78 const G4int iso = ParticleTable::getIsospin(particle1->getType()) + ParticleTable::getIsospin(particle2->getType());
79 G4int iso_n;
80 if(particle1->isNucleon()) iso_n = ParticleTable::getIsospin(particle1->getType());
81 else iso_n = ParticleTable::getIsospin(particle2->getType());
82
83 ParticleType Nucleon1Type;
84 ParticleType Nucleon2Type;
85 ParticleType KaonType;
86 ParticleType antiKaonType;
87
88 const G4double rdm = Random::shoot();
89
90 if(std::abs(iso) == 4){// D++ p
91 Nucleon1Type = ParticleTable::getNucleonType(iso/4);
92 Nucleon2Type = ParticleTable::getNucleonType(iso/4);
93 KaonType = ParticleTable::getKaonType(iso/4);
94 antiKaonType = ParticleTable::getAntiKaonType(iso/4);
95 }
96 else if(iso == 0){// D+ n
97 if(rdm*8 < 2){
98 Nucleon1Type = Proton;
99 Nucleon2Type = Proton;
100 KaonType = KZero;
101 antiKaonType = KMinus;
102 }
103 else if(rdm*8 < 3){
104 Nucleon1Type = Proton;
105 Nucleon2Type = Neutron;
106 KaonType = ParticleTable::getKaonType(-iso_n);
107 antiKaonType = ParticleTable::getAntiKaonType(iso_n);
108 }
109 else if(rdm*8 < 6){
110 Nucleon1Type = Proton;
111 Nucleon2Type = Neutron;
112 KaonType = ParticleTable::getKaonType(iso_n);
113 antiKaonType = ParticleTable::getAntiKaonType(-iso_n);
114 }
115 else{
116 Nucleon1Type = Neutron;
117 Nucleon2Type = Neutron;
118 KaonType = KPlus;
119 antiKaonType = KZeroBar;
120 }
121 }
122 else if(ParticleTable::getIsospin(particle1->getType()) == ParticleTable::getIsospin(particle2->getType())){// D+ p
123 if(rdm*3 < 1){
124 Nucleon1Type = ParticleTable::getNucleonType(iso/2);
125 Nucleon2Type = ParticleTable::getNucleonType(iso/2);
126 KaonType = ParticleTable::getKaonType(iso/2);
127 antiKaonType = ParticleTable::getAntiKaonType(-iso/2);
128 }
129 else if(rdm*3 < 2){
130 Nucleon1Type = ParticleTable::getNucleonType(iso/2);
131 Nucleon2Type = ParticleTable::getNucleonType(iso/2);
132 KaonType = ParticleTable::getKaonType(-iso/2);
133 antiKaonType = ParticleTable::getAntiKaonType(iso/2);
134 }
135 else{
136 Nucleon1Type = ParticleTable::getNucleonType(iso/2);
137 Nucleon2Type = ParticleTable::getNucleonType(-iso/2);
138 KaonType = ParticleTable::getKaonType(iso/2);
139 antiKaonType = ParticleTable::getAntiKaonType(iso/2);
140 }
141 }
142 else{// D++ n
143 if(rdm*5 < 2){
144 Nucleon1Type = ParticleTable::getNucleonType(iso/2);
145 Nucleon2Type = ParticleTable::getNucleonType(iso/2);
146 KaonType = ParticleTable::getKaonType(iso/2);
147 antiKaonType = ParticleTable::getAntiKaonType(-iso/2);
148 }
149 else if(rdm*5 < 4){
150 Nucleon1Type = ParticleTable::getNucleonType(iso/2);
151 Nucleon2Type = ParticleTable::getNucleonType(iso/2);
152 KaonType = ParticleTable::getKaonType(-iso/2);
153 antiKaonType = ParticleTable::getAntiKaonType(iso/2);
154 }
155 else{
156 Nucleon1Type = ParticleTable::getNucleonType(iso/2);
157 Nucleon2Type = ParticleTable::getNucleonType(-iso/2);
158 KaonType = ParticleTable::getKaonType(iso/2);
159 antiKaonType = ParticleTable::getAntiKaonType(iso/2);
160 }
161 }
162
163
164 particle1->setType(Nucleon1Type);
165 particle2->setType(Nucleon2Type);
166
167 ParticleList list;
168 list.push_back(particle1);
169 list.push_back(particle2);
170 const ThreeVector &rcol1 = particle1->getPosition();
171 const ThreeVector zero1;
172 const ThreeVector &rcol2 = particle2->getPosition();
173 const ThreeVector zero2;
174 Particle *kaon = new Particle(KaonType,zero1,rcol1);
175 Particle *antikaon = new Particle(antiKaonType,zero2,rcol2);
176 list.push_back(kaon);
177 list.push_back(antikaon);
178
179 if(Random::shoot()<0.5) PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
180 else PhaseSpaceGenerator::generateBiased(sqrtS, list, 1, angularSlope);
181
182 fs->addModifiedParticle(particle1);
183 fs->addModifiedParticle(particle2);
184 fs->addCreatedParticle(kaon);
185 fs->addCreatedParticle(antikaon);
186
187 }
188 }
189