| Geant4 Cross Reference |
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
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 "G4INCLNKbToS2piChannel.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 const G4double NKbToS2piChannel::angularSlope = 4.; // What is the exact effect? Sould be check
50
51 NKbToS2piChannel::NKbToS2piChannel(Particle *p1, Particle *p2)
52 : particle1(p1), particle2(p2)
53 {}
54
55 NKbToS2piChannel::~NKbToS2piChannel(){}
56
57 void NKbToS2piChannel::fillFinalState(FinalState *fs) {
58
59 // p K0b -> S+ pi+ pi- (2/3)
60 // p K0b -> S+ pi0 pi0 (1/4)
61 // p K0b -> S0 pi+ pi0 (5/6)
62 // p K0b -> S- pi+ pi+ (2/3)
63 //
64 // p K- -> S+ pi0 pi- (1)
65 // p K- -> S0 pi+ pi- (2/3)
66 // p K- -> S0 pi0 pi0 (1/8)
67 // p K- -> S- pi+ pi0 (2/3)
68
69 Particle *nucleon;
70 Particle *kaon;
71
72 if(particle1->isNucleon()){
73 nucleon = particle1;
74 kaon = particle2;
75 }
76 else{
77 nucleon = particle2;
78 kaon = particle1;
79 }
80
81 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(nucleon, kaon);
82
83 const G4int iso = ParticleTable::getIsospin(nucleon->getType()) + ParticleTable::getIsospin(kaon->getType());
84 const G4int iso_n = ParticleTable::getIsospin(nucleon->getType());
85 G4double rdm = Random::shoot();
86
87 ParticleType PionType;
88
89 if(iso == 2 || iso == -2){
90 if(rdm*29. < 8.){
91 PionType = ParticleTable::getPionType(-iso);
92 kaon->setType(ParticleTable::getPionType(iso));
93 nucleon->setType(ParticleTable::getSigmaType(iso));
94 }
95 else if(rdm*29. < 11.){
96 PionType = PiZero;
97 kaon->setType(PiZero);
98 nucleon->setType(ParticleTable::getSigmaType(iso));
99 }
100 else if(rdm*29. < 21.){
101 PionType = PiZero;
102 kaon->setType(ParticleTable::getPionType(iso));
103 nucleon->setType(SigmaZero);
104 }
105 else{
106 PionType = ParticleTable::getPionType(iso);
107 kaon->setType(ParticleTable::getPionType(iso));
108 nucleon->setType(ParticleTable::getSigmaType(-iso));
109 }
110 }
111 else{
112 if(rdm*59. < 24.){
113 PionType = PiZero;
114 kaon->setType(ParticleTable::getPionType(-2*iso_n));
115 nucleon->setType(ParticleTable::getSigmaType(2*iso_n));
116 }
117 else if(rdm*59. < 40.){
118 PionType = ParticleTable::getPionType(2*iso_n);
119 kaon->setType(ParticleTable::getPionType(-2*iso_n));
120 nucleon->setType(SigmaZero);
121 }
122 else if(rdm*59. < 43.){
123 PionType = PiZero;
124 kaon->setType(PiZero);
125 nucleon->setType(SigmaZero);
126 }
127 else{
128 PionType = ParticleTable::getPionType(2*iso_n);
129 kaon->setType(PiZero);
130 nucleon->setType(ParticleTable::getSigmaType(-2*iso_n));
131 }
132 }
133
134 ParticleList list;
135 list.push_back(nucleon);
136 list.push_back(kaon);
137 const ThreeVector &rcol = nucleon->getPosition();
138 const ThreeVector zero;
139 Particle *pion = new Particle(PionType,zero,rcol);
140 list.push_back(pion);
141
142 PhaseSpaceGenerator::generateBiased(sqrtS, list, 0, angularSlope);
143
144 fs->addModifiedParticle(nucleon);
145 fs->addModifiedParticle(kaon);
146 fs->addCreatedParticle(pion);
147
148 }
149 }
150