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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 "G4INCLNKbToNKbpiChannel.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 NKbToNKbpiChannel::angularSlope = 4.; // What is the exact effect? Sould be check
50
51 NKbToNKbpiChannel::NKbToNKbpiChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NKbToNKbpiChannel::~NKbToNKbpiChannel(){}
56
57 void NKbToNKbpiChannel::fillFinalState(FinalState *fs) {
58
59 // ratio
60 // p K- (28) p K0b (20)
61 //
62 // p K- -> p K- pi0 (6)*
63 // p K- -> p K0b pi- (7)*
64 // p K- -> n K- pi+ (9)*
65 // p K- -> n K0b pi0 (6)
66 //
67 // p K0b -> p K0b pi0 (4)
68 // p K0b -> p K- pi+ (10)*
69 // p K0b -> n K0b pi+ (6)*
70 //
71
72 Particle *nucleon;
73 Particle *kaon;
74
75 if(particle1->isNucleon()){
76 nucleon = particle1;
77 kaon = particle2;
78 }
79 else{
80 nucleon = particle2;
81 kaon = particle1;
82 }
83
84 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, kaon);
85
86 const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(kaon->getType());
87 const G4int iso_n = ParticleTable::getIsospin(nucleon->getType());
88 G4double rdm = Random::shoot();
89
90 ParticleType PionType;
91
92 if(iso == 2 || iso == -2){
93 if(rdm*5. < 1.){
94 PionType = PiZero;
95 }
96 else if(rdm*2. < 1.){
97 PionType = ParticleTable::getPionType(iso);
98 nucleon->setType(ParticleTable::getNucleonType(-iso/2));
99 }
100 else{
101 PionType = ParticleTable::getPionType(iso);
102 kaon->setType(ParticleTable::getAntiKaonType(-iso/2));
103 }
104 }
105 else{
106 if(rdm*28. < 6.){
107 PionType = PiZero;
108 }
109 else if(rdm*28. < 13.){
110 kaon->setType(ParticleTable::getAntiKaonType(iso_n));
111 PionType = ParticleTable::getPionType(-2*iso_n);
112 }
113 else if(rdm*28. < 22.){
114 nucleon->setType(ParticleTable::getNucleonType(-iso_n));
115 PionType = ParticleTable::getPionType(2*iso_n);
116 }
117 else{
118 kaon->setType(ParticleTable::getAntiKaonType(iso_n));
119 nucleon->setType(ParticleTable::getNucleonType(-iso_n));
120 PionType = PiZero;
121 }
122 }
123
124 ParticleList list;
125 list.push_back(nucleon);
126 list.push_back(kaon);
127 const ThreeVector &rcol = nucleon->getPosition();
128 const ThreeVector zero;
129 Particle *pion = new Particle(PionType,zero,rcol);
130 list.push_back(pion);
131
132 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
133
134 fs->addModifiedParticle(nucleon);
135 fs->addModifiedParticle(kaon);
136 fs->addCreatedParticle(pion);
137
138 }
139 }
140