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25 // 25 //
26 // INCL++ intra-nuclear cascade model 26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France 27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium 28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France 29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and H 30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France 31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France 32 // Davide Mancusi, CEA-Saclay, France
33 // 33 //
34 #define INCLXX_IN_GEANT4_MODE 1 34 #define INCLXX_IN_GEANT4_MODE 1
35 35
36 #include "globals.hh" 36 #include "globals.hh"
37 37
38 #include "G4INCLEtaNToPiPiNChannel.hh" 38 #include "G4INCLEtaNToPiPiNChannel.hh"
39 #include "G4INCLKinematicsUtils.hh" 39 #include "G4INCLKinematicsUtils.hh"
40 #include "G4INCLBinaryCollisionAvatar.hh" 40 #include "G4INCLBinaryCollisionAvatar.hh"
41 #include "G4INCLRandom.hh" 41 #include "G4INCLRandom.hh"
42 #include "G4INCLGlobals.hh" 42 #include "G4INCLGlobals.hh"
43 #include "G4INCLLogger.hh" 43 #include "G4INCLLogger.hh"
44 #include <algorithm> 44 #include <algorithm>
45 #include "G4INCLPhaseSpaceGenerator.hh" 45 #include "G4INCLPhaseSpaceGenerator.hh"
46 46
47 namespace G4INCL { 47 namespace G4INCL {
48 48
49 const G4double EtaNToPiPiNChannel::angularSl 49 const G4double EtaNToPiPiNChannel::angularSlope = 15.; // from piNToMultipions
50 50
51 EtaNToPiPiNChannel::EtaNToPiPiNChannel(Parti 51 EtaNToPiPiNChannel::EtaNToPiPiNChannel(Particle *p1, Particle *p2)
52 : ind2(0), 52 : ind2(0),
53 particle1(p1), 53 particle1(p1),
54 particle2(p2) 54 particle2(p2)
55 {} 55 {}
56 56
57 EtaNToPiPiNChannel::~EtaNToPiPiNChannel(){ 57 EtaNToPiPiNChannel::~EtaNToPiPiNChannel(){
58 58
59 } 59 }
60 60
61 void EtaNToPiPiNChannel::fillFinalState(Fina 61 void EtaNToPiPiNChannel::fillFinalState(FinalState *fs) {
62 62
63 Particle * nucleon; 63 Particle * nucleon;
64 Particle * eta; 64 Particle * eta;
65 if(particle1->isNucleon()) { 65 if(particle1->isNucleon()) {
66 nucleon = particle1; 66 nucleon = particle1;
67 eta = particle2; 67 eta = particle2;
68 } else { 68 } else {
69 nucleon = particle2; 69 nucleon = particle2;
70 eta = particle1; 70 eta = particle1;
71 } 71 }
72 72
73 const G4double sqrtS = KinematicsUtils::to << 73 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, eta);
74 74
75 ind2=ParticleTable::getIsospin(nucleon->ge << 75 ind2=ParticleTable::getIsospin(nucleon->getType());
76 76
77 eta->setType(PiZero); << 77 eta->setType(PiZero);
78 78
79 ParticleType pionType; << 79 ParticleType pionType;
80 G4double rs1=Random::shoot(); << 80 G4double rs1=Random::shoot();
81 if (ind2 == 1) { << 81 if (ind2 == 1) {
82 if (rs1*6. > 5.) pionType=PiZero; << 82 if (rs1*2. > 1.) pionType=PiZero;
83 else if (rs1*6. > 3.) { << 83 else {
84 pionType=PiPlus; << 84 pionType=PiPlus;
85 ind2=-ind2; << 85 ind2=-ind2;
86 } << 86 }
87 else { << 87 }
88 pionType=PiPlus; << 88 else {
89 eta->setType(PiMinus); << 89 if (rs1*2. > 1.) pionType=PiZero;
90 } << 90 else {
91 } << 91 pionType=PiMinus;
92 else { << 92 ind2=-ind2;
93 if (rs1*6. > 5.) pionType=PiZero; << 93 }
94 else if (rs1*6. > 3.) { << 94 }
95 pionType=PiMinus; <<
96 ind2=-ind2; <<
97 } <<
98 else { <<
99 pionType=PiPlus; <<
100 eta->setType(PiMinus); <<
101 } <<
102 } <<
103 95
104 96
105 const ParticleType tn=ParticleTable::getNu << 97 const ParticleType tn=ParticleTable::getNucleonType(ind2);
106 nucleon->setType(tn); << 98 nucleon->setType(tn);
107 ParticleList list; << 99 ParticleList list;
108 list.push_back(nucleon); << 100 list.push_back(nucleon);
109 list.push_back(eta); << 101 list.push_back(eta);
110 const ThreeVector &rcolpion = eta->getPosi << 102 const ThreeVector &rcolpion = eta->getPosition();
111 const ThreeVector zero; << 103 const ThreeVector zero;
112 Particle *newPion = new Particle(pionType, << 104 Particle *newPion = new Particle(pionType,zero,rcolpion);
113 list.push_back(newPion); << 105 list.push_back(newPion);
114 fs->addModifiedParticle(nucleon); << 106 fs->addModifiedParticle(nucleon);
115 fs->addModifiedParticle(eta); << 107 fs->addModifiedParticle(eta);
116 fs->addCreatedParticle(newPion); << 108 fs->addCreatedParticle(newPion);
117 109
118 PhaseSpaceGenerator::generateBiased(sqrtS, << 110 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
119 111
120 } 112 }
121 113
122 } 114 }
123 115