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G4INCLNpiToLK2piChannel.cc
Go to the documentation of this file. Or view the newest version in sPHENIX GitHub for file G4INCLNpiToLK2piChannel.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 NpiToLK2piChannel::angularSlope = 6.; // What is the exact effect? Sould be check
50 
52  : particle1(p1), particle2(p2)
53  {}
54 
56 
58 
59  // p pi+ -> L K+ pi+ pi0 (1)
60  // p pi+ -> L K0 pi+ pi+ (1)
61  //
62  // p pi0 -> L K+ pi0 pi0 (1/4)
63  // p pi0 -> L K+ pi+ pi- (1)
64  // p pi0 -> L K0 pi+ pi0 (1/2)
65  //
66  // p pi- -> L K+ pi0 pi- (1)
67  // p pi- -> L K0 pi+ pi- (1)
68  // p pi- -> L K0 pi0 pi0 (1/2)
69 
71  Particle *pion;
72 
73  if(particle1->isNucleon()){
74  nucleon = particle1;
75  pion = particle2;
76  }
77  else{
78  nucleon = particle2;
79  pion = particle1;
80  }
81 
82  const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
83 
84  const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(pion->getType());
85  G4double rdm = Random::shoot();
86 
87  ParticleType KaonType;
88  ParticleType PionType;
89 
90  if(iso == 3 || iso == -3){
91  if(rdm < 0.5){
92  KaonType = ParticleTable::getKaonType(iso/3);
93  PionType = PiZero;
94  }
95  else{
96  KaonType = ParticleTable::getKaonType(-iso/3);
97  PionType = ParticleTable::getPionType(2*iso/3);
98  }
99  }
100  else if(pion->getType() == PiZero){
101  if(rdm*7. < 1.){
102  KaonType = ParticleTable::getKaonType(iso);
103  PionType = PiZero;
104  }
105  else if(rdm*7. < 5.){
106  KaonType = ParticleTable::getKaonType(iso);
107  pion->setType(PiPlus);
108  PionType = PiMinus;
109  }
110  else{
111  KaonType = ParticleTable::getKaonType(-iso);
112  PionType = ParticleTable::getPionType(2*iso);
113  }
114  }
115  else{
116  if(rdm*5. < 2.){
117  KaonType = ParticleTable::getKaonType(-iso);
118  PionType = PiZero;
119  }
120  else if(rdm*5. < 4.){
121  KaonType = ParticleTable::getKaonType(iso);
122  PionType = ParticleTable::getPionType(-2*iso);;
123  }
124  else{
125  KaonType = ParticleTable::getKaonType(iso);
126  pion->setType(PiZero);
127  PionType = PiZero;
128  }
129  }
130 
131  nucleon->setType(Lambda);
132 
133  ParticleList list;
134  list.push_back(nucleon);
135  list.push_back(pion);
136  const ThreeVector &rcol1 = nucleon->getPosition();
137  const ThreeVector &rcol2 = pion->getPosition();
138  const ThreeVector zero;
139  Particle *kaon = new Particle(KaonType,zero,rcol1);
140  Particle *pion2 = new Particle(PionType,zero,rcol2);
141  list.push_back(kaon);
142  list.push_back(pion2);
143 
145 
146  INCL_DEBUG("NpiToLK2pi " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
147 
148  fs->addModifiedParticle(nucleon);
149  fs->addModifiedParticle(pion);
150  fs->addCreatedParticle(kaon);
151  fs->addCreatedParticle(pion2);
152 
153  }
154 }