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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*6. > 5.) pionType=PiZero;
83 else if (rs1*6. > 3.) { 83 else if (rs1*6. > 3.) {
84 pionType=PiPlus; 84 pionType=PiPlus;
85 ind2=-ind2; 85 ind2=-ind2;
86 } 86 }
87 else { 87 else {
88 pionType=PiPlus; 88 pionType=PiPlus;
89 eta->setType(PiMinus); 89 eta->setType(PiMinus);
90 } 90 }
91 } 91 }
92 else { 92 else {
93 if (rs1*6. > 5.) pionType=PiZero; 93 if (rs1*6. > 5.) pionType=PiZero;
94 else if (rs1*6. > 3.) { 94 else if (rs1*6. > 3.) {
95 pionType=PiMinus; 95 pionType=PiMinus;
96 ind2=-ind2; 96 ind2=-ind2;
97 } 97 }
98 else { 98 else {
99 pionType=PiPlus; 99 pionType=PiPlus;
100 eta->setType(PiMinus); 100 eta->setType(PiMinus);
101 } 101 }
102 } 102 }
103 103
104 104
105 const ParticleType tn=ParticleTable::getNu 105 const ParticleType tn=ParticleTable::getNucleonType(ind2);
106 nucleon->setType(tn); 106 nucleon->setType(tn);
107 ParticleList list; 107 ParticleList list;
108 list.push_back(nucleon); 108 list.push_back(nucleon);
109 list.push_back(eta); 109 list.push_back(eta);
110 const ThreeVector &rcolpion = eta->getPosi 110 const ThreeVector &rcolpion = eta->getPosition();
111 const ThreeVector zero; 111 const ThreeVector zero;
112 Particle *newPion = new Particle(pionType, 112 Particle *newPion = new Particle(pionType,zero,rcolpion);
113 list.push_back(newPion); 113 list.push_back(newPion);
114 fs->addModifiedParticle(nucleon); 114 fs->addModifiedParticle(nucleon);
115 fs->addModifiedParticle(eta); 115 fs->addModifiedParticle(eta);
116 fs->addCreatedParticle(newPion); 116 fs->addCreatedParticle(newPion);
117 117
118 PhaseSpaceGenerator::generateBiased(sqrtS, 118 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
119 119
120 } 120 }
121 121
122 } 122 }
123 123