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G4INCLNKbToS2piChannel.cc
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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 
39 #include "G4INCLKinematicsUtils.hh"
41 #include "G4INCLRandom.hh"
42 #include "G4INCLGlobals.hh"
43 #include "G4INCLLogger.hh"
44 #include <algorithm>
46 
47 namespace G4INCL {
48 
49  const G4double NKbToS2piChannel::angularSlope = 4.; // What is the exact effect? Sould be check
50 
52  : particle1(p1), particle2(p2)
53  {}
54 
56 
58 
59  // p K0b -> S+ pi+ pi- (2/3)
60  // p K0b -> S+ pi0 pi0 (1/4)
61  // p K0b -> S0 pi+ pi0 (5/6)
62  // p K0b -> S- pi+ pi+ (2/3)
63  //
64  // p K- -> S+ pi0 pi- (1)
65  // p K- -> S0 pi+ pi- (2/3)
66  // p K- -> S0 pi0 pi0 (1/8)
67  // p K- -> S- pi+ pi0 (2/3)
68 
70  Particle *kaon;
71 
72  if(particle1->isNucleon()){
73  nucleon = particle1;
74  kaon = particle2;
75  }
76  else{
77  nucleon = particle2;
78  kaon = particle1;
79  }
80 
81  const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, kaon);
82 
83  const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(kaon->getType());
84  const G4int iso_n = ParticleTable::getIsospin(nucleon->getType());
85  G4double rdm = Random::shoot();
86 
87  ParticleType PionType;
88 
89  if(iso == 2 || iso == -2){
90  if(rdm*29. < 8.){
91  PionType = ParticleTable::getPionType(-iso);
93  nucleon->setType(ParticleTable::getSigmaType(iso));
94  }
95  else if(rdm*29. < 11.){
96  PionType = PiZero;
97  kaon->setType(PiZero);
98  nucleon->setType(ParticleTable::getSigmaType(iso));
99  }
100  else if(rdm*29. < 21.){
101  PionType = PiZero;
103  nucleon->setType(SigmaZero);
104  }
105  else{
106  PionType = ParticleTable::getPionType(iso);
108  nucleon->setType(ParticleTable::getSigmaType(-iso));
109  }
110  }
111  else{
112  if(rdm*59. < 24.){
113  PionType = PiZero;
114  kaon->setType(ParticleTable::getPionType(-2*iso_n));
115  nucleon->setType(ParticleTable::getSigmaType(2*iso_n));
116  }
117  else if(rdm*59. < 40.){
118  PionType = ParticleTable::getPionType(2*iso_n);
119  kaon->setType(ParticleTable::getPionType(-2*iso_n));
120  nucleon->setType(SigmaZero);
121  }
122  else if(rdm*59. < 43.){
123  PionType = PiZero;
124  kaon->setType(PiZero);
125  nucleon->setType(SigmaZero);
126  }
127  else{
128  PionType = ParticleTable::getPionType(2*iso_n);
129  kaon->setType(PiZero);
130  nucleon->setType(ParticleTable::getSigmaType(-2*iso_n));
131  }
132  }
133 
134  ParticleList list;
135  list.push_back(nucleon);
136  list.push_back(kaon);
137  const ThreeVector &rcol = nucleon->getPosition();
138  const ThreeVector zero;
139  Particle *pion = new Particle(PionType,zero,rcol);
140  list.push_back(pion);
141 
143 
144  fs->addModifiedParticle(nucleon);
145  fs->addModifiedParticle(kaon);
146  fs->addCreatedParticle(pion);
147 
148  }
149 }