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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 "G4INCLNLToNSChannel.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 NLToNSChannel::NLToNSChannel(Particle *p1, Particle *p2)
50 : particle1(p1), particle2(p2)
51 {}
52
53 NLToNSChannel::~NLToNSChannel(){}
54
55 void NLToNSChannel::fillFinalState(FinalState *fs) {
56
57 Particle *nucleon;
58 Particle *lambda;
59
60 if(particle1->isNucleon()){
61 nucleon = particle1;
62 lambda = particle2;
63 }
64 else{
65 nucleon = particle2;
66 lambda = particle1;
67 }
68
69 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, lambda);
70 const G4int iso = ParticleTable::getIsospin(nucleon->getType());
71 const G4double rdm = Random::shoot();
72
73 if(rdm*3. < 2){
74 nucleon->setType(ParticleTable::getNucleonType(-iso));
75 lambda->setType(ParticleTable::getSigmaType(2*iso));
76 }
77 else{
78 lambda->setType(SigmaZero);
79 }
80
81 G4double mn=nucleon->getMass();
82 G4double my=lambda->getMass();
83
84 G4double ey=(sqrtS*sqrtS+my*my-mn*mn)/(2*sqrtS);
85 G4double en=std::sqrt(ey*ey-my*my+mn*mn);
86 nucleon->setEnergy(en);
87 lambda->setEnergy(ey);
88 G4double py=std::sqrt(ey*ey-my*my);
89
90 ThreeVector mom_hyperon = Random::normVector(py);
91
92 lambda->setMomentum(mom_hyperon);
93 nucleon->setMomentum(-mom_hyperon);
94
95 fs->addModifiedParticle(nucleon);
96 fs->addModifiedParticle(lambda);
97
98 }
99 }
100