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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 "G4INCLNKToNKpiChannel.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 NKToNKpiChannel::angularSlope = 4.; // What is the exact effect? Sould be check
50
51 NKToNKpiChannel::NKToNKpiChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NKToNKpiChannel::~NKToNKpiChannel(){}
56
57 void NKToNKpiChannel::fillFinalState(FinalState *fs) {
58
59 // K+ p -> p K+ pi0 (1.2)
60 // K+ p -> p K0 pi+ (3)
61 // K+ p -> n K+ pi+ (0.8)
62 //
63 // K0 p -> p K+ pi- (1)
64 // K0 p -> p K0 pi0 (0.845)
65 // K0 p -> n K+ pi0 (1.47)
66 // K0 p -> n K0 pi+ (2.23)
67
68 Particle *nucleon;
69 Particle *kaon;
70
71 if(particle1->isNucleon()){
72 nucleon = particle1;
73 kaon = particle2;
74 }
75 else{
76 nucleon = particle2;
77 kaon = particle1;
78 }
79
80 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, kaon);
81
82 const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(kaon->getType());
83 const G4int iso_n = ParticleTable::getIsospin(nucleon->getType());
84 G4double rdm = Random::shoot();
85
86 ParticleType PionType;
87
88 if(iso == 2 || iso == -2){
89 if(rdm*5. < 1.2){
90 PionType = PiZero;
91 }
92 else if(rdm*5. < 4.2){
93 PionType = ParticleTable::getPionType(iso);
94 kaon->setType(ParticleTable::getKaonType(-iso/2));
95 }
96 else{
97 PionType = ParticleTable::getPionType(iso);
98 nucleon->setType(ParticleTable::getNucleonType(-iso/2));
99 }
100 }
101 else{
102 if(rdm*5.545 < 1.){
103 kaon->setType(ParticleTable::getKaonType(iso_n));
104 PionType = ParticleTable::getPionType(-2*iso_n);
105 }
106 else if(rdm*5.545 < 1.845){
107 PionType = PiZero;
108 }
109 else if(rdm*5.545 < 3.315){
110 kaon->setType(ParticleTable::getKaonType(iso_n));
111 nucleon->setType(ParticleTable::getNucleonType(-iso_n));
112 PionType = PiZero;
113 }
114 else{
115 nucleon->setType(ParticleTable::getNucleonType(-iso_n));
116 PionType = ParticleTable::getPionType(2*iso_n);
117 }
118 }
119
120 ParticleList list;
121 list.push_back(nucleon);
122 list.push_back(kaon);
123 const ThreeVector &rcol = nucleon->getPosition();
124 const ThreeVector zero;
125 Particle *pion = new Particle(PionType,zero,rcol);
126 list.push_back(pion);
127
128 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
129
130 fs->addModifiedParticle(nucleon);
131 fs->addModifiedParticle(kaon);
132 fs->addCreatedParticle(pion);
133
134 }
135 }
136