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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 "G4INCLNKToNKChannel.hh" 38 #include "G4INCLNKToNKChannel.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 NKToNKChannel::NKToNKChannel(Particle *p1, P 49 NKToNKChannel::NKToNKChannel(Particle *p1, Particle *p2)
50 : particle1(p1), particle2(p2) 50 : particle1(p1), particle2(p2)
51 {} 51 {}
52 52
53 NKToNKChannel::~NKToNKChannel(){} 53 NKToNKChannel::~NKToNKChannel(){}
54 54
55 void NKToNKChannel::fillFinalState(FinalStat 55 void NKToNKChannel::fillFinalState(FinalState *fs) {
56 56
57 Particle *nucleon; 57 Particle *nucleon;
58 Particle *kaon; 58 Particle *kaon;
59 59
60 if(particle1->isNucleon()){ 60 if(particle1->isNucleon()){
61 nucleon = particle1; 61 nucleon = particle1;
62 kaon = particle2; 62 kaon = particle2;
63 } 63 }
64 else{ 64 else{
65 nucleon = particle2; 65 nucleon = particle2;
66 kaon = particle1; 66 kaon = particle1;
67 } 67 }
68 68
69 // assert(ParticleTable::getIsospin(nucleon->g 69 // assert(ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(kaon->getType()) == 0);
70 70
71 if(kaon->getType() == KZero){ 71 if(kaon->getType() == KZero){
72 nucleon->setType(Neutron); 72 nucleon->setType(Neutron);
73 kaon->setType(KPlus); 73 kaon->setType(KPlus);
74 } 74 }
75 else{ 75 else{
76 nucleon->setType(Proton); 76 nucleon->setType(Proton);
77 kaon->setType(KZero); 77 kaon->setType(KZero);
78 } 78 }
79 79
80 ThreeVector mom_kaon; 80 ThreeVector mom_kaon;
81 81
82 // const G4double pLab = KinematicsUtils::m 82 // const G4double pLab = KinematicsUtils::momentumInLab(kaon,nucleon);
83 83
84 /* if(pLab==0) mom_kaon = Random::normVecto 84 /* if(pLab==0) mom_kaon = Random::normVector();
85 else{ 85 else{
86 const G4double x = kaon->getMomentum().g 86 const G4double x = kaon->getMomentum().getX();
87 const G4double y = kaon->getMomentum().g 87 const G4double y = kaon->getMomentum().getY();
88 const G4double z = kaon->getMomentum().g 88 const G4double z = kaon->getMomentum().getZ();
89 89
90 const G4double r = std::sqrt(x*x+y*y+z*z 90 const G4double r = std::sqrt(x*x+y*y+z*z);
91 const G4double rho = std::sqrt(x*x+y*y); 91 const G4double rho = std::sqrt(x*x+y*y);
92 92
93 const G4double b = 12. * pLab/2375.; // 93 const G4double b = 12. * pLab/2375.; // correspond to the forward slope description at 2375 MeV/c in K- p elastic
94 const G4double cos_theta = std::log(Rand 94 const G4double cos_theta = std::log(Random::shoot()*(std::exp(b)-std::exp(-b))+std::exp(-b))/b;
95 const G4double sin_theta = std::sqrt(1-c 95 const G4double sin_theta = std::sqrt(1-cos_theta*cos_theta);
96 96
97 const G4double cos_phi = std::cos(Random 97 const G4double cos_phi = std::cos(Random::shoot()*Math::twoPi);
98 const G4double sin_phi = std::sqrt(1-cos 98 const G4double sin_phi = std::sqrt(1-cos_phi*cos_phi);
99 99
100 if(rho == 0) mom_kaon = ThreeVector(sin_ 100 if(rho == 0) mom_kaon = ThreeVector(sin_theta*cos_phi,sin_theta*sin_phi,cos_theta);
101 // Rotation in the direction of the inci 101 // Rotation in the direction of the incident kaon
102 const G4double px = x/r*cos_theta - y/rh 102 const G4double px = x/r*cos_theta - y/rho*sin_theta*cos_phi + z/r*x/rho*sin_theta*sin_phi;
103 const G4double py = y/r*cos_theta + x/rh 103 const G4double py = y/r*cos_theta + x/rho*sin_theta*cos_phi + z/r*y/rho*sin_theta*sin_phi;
104 const G4double pz = z/r*cos_theta - rho/ 104 const G4double pz = z/r*cos_theta - rho/r*sin_theta*sin_phi;
105 105
106 mom_kaon = ThreeVector(px,py,pz); 106 mom_kaon = ThreeVector(px,py,pz);
107 }*/ 107 }*/
108 108
109 mom_kaon = Random::normVector(); 109 mom_kaon = Random::normVector();
110 110
111 G4double norm = KinematicsUtils::momentumI 111 G4double norm = KinematicsUtils::momentumInCM(kaon,nucleon);
112 112
113 kaon->setMomentum(mom_kaon*norm); 113 kaon->setMomentum(mom_kaon*norm);
114 nucleon->setMomentum(-mom_kaon*norm); 114 nucleon->setMomentum(-mom_kaon*norm);
115 115
116 kaon->adjustEnergyFromMomentum(); 116 kaon->adjustEnergyFromMomentum();
117 nucleon->adjustEnergyFromMomentum(); 117 nucleon->adjustEnergyFromMomentum();
118 118
119 fs->addModifiedParticle(nucleon); 119 fs->addModifiedParticle(nucleon);
120 fs->addModifiedParticle(kaon); 120 fs->addModifiedParticle(kaon);
121 121
122 } 122 }
123 } 123 }
124 124