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G4INCLNpiToLKpiChannel.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 NpiToLKpiChannel::angularSlope = 6.; // What is the exact effect? Sould be check
50 
52  : particle1(p1), particle2(p2)
53  {}
54 
56 
58 
59  // ratio
60  // p pi+ (1) p pi0 (3/2) p pi- (2)
61  //
62  // p pi0 -> L K+ pi0 (1/2)
63  // all the others (1)
64 
66  Particle *pion;
67 
68  if(particle1->isNucleon()){
69  nucleon = particle1;
70  pion = particle2;
71  }
72  else{
73  nucleon = particle2;
74  pion = particle1;
75  }
76 
77  const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, pion);
78 
79  const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(pion->getType());
80  G4double rdm = Random::shoot();
81 
82  ParticleType KaonType;
83 
84  if(iso == 3 || iso == -3){
85  KaonType = ParticleTable::getKaonType(iso/3);
86  }
87  else if(pion->getType() == PiZero){
88  if(rdm*3. < 1.){
89  KaonType = ParticleTable::getKaonType(iso);
90  }
91  else{
92  KaonType = ParticleTable::getKaonType(-iso);
93  pion->setType(ParticleTable::getPionType(2*iso));
94  }
95  }
96  else{
97  if(rdm < 0.5){
98  KaonType = ParticleTable::getKaonType(-iso);
99  }
100  else{
101  KaonType = ParticleTable::getKaonType(iso);
102  pion->setType(PiZero);
103  }
104  }
105 
106  nucleon->setType(Lambda);
107 
108  ParticleList list;
109  list.push_back(nucleon);
110  list.push_back(pion);
111  const ThreeVector &rcol = nucleon->getPosition();
112  const ThreeVector zero;
113  Particle *kaon = new Particle(KaonType,zero,rcol);
114  list.push_back(kaon);
115 
117 
118  INCL_DEBUG("NpiToLKpi " << (kaon->getMomentum().theta()) * 180. / G4INCL::Math::pi << '\n');
119 
120  fs->addModifiedParticle(nucleon);
121  fs->addModifiedParticle(pion);
122  fs->addCreatedParticle(kaon);
123 
124  }
125 }
void generateBiased(const G4double sqrtS, ParticleList &particles, const size_t index, const G4double slope)
Generate a biased event in the CM system.
G4bool pion(G4int ityp)
void addModifiedParticle(Particle *p)
const G4INCL::ThreeVector & getPosition() const
G4double totalEnergyInCM(Particle const *const p1, Particle const *const p2)
const G4INCL::ThreeVector & getMomentum() const
NpiToLKpiChannel(Particle *, Particle *)
G4bool nucleon(G4int ityp)
#define INCL_DEBUG(x)
double G4double
Definition: G4Types.hh:76
G4double shoot()
Definition: G4INCLRandom.cc:93
static const G4double angularSlope
ParticleType getKaonType(const G4int isosp)
Get the type of kaon.
const G4double pi
void setType(ParticleType t)
int G4int
Definition: G4Types.hh:78
G4int getIsospin(const ParticleType t)
Get the isospin of a particle.
G4INCL::ParticleType getType() const
G4double theta() const
void fillFinalState(FinalState *fs)
void addCreatedParticle(Particle *p)
G4bool isNucleon() const
ParticleType getPionType(const G4int isosp)
Get the type of pion.