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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 "G4INCLPiNToOmegaChannel.hh"
39 #include "G4INCLKinematicsUtils.hh"
40 #include "G4INCLBinaryCollisionAvatar.hh"
41 #include "G4INCLRandom.hh"
42 #include "G4INCLGlobals.hh"
43 #include "G4INCLLogger.hh"
44
45 namespace G4INCL {
46
47 PiNToOmegaChannel::PiNToOmegaChannel(Particle *p1, Particle *p2)
48 : particle1(p1), particle2(p2)
49 {
50
51 }
52
53 PiNToOmegaChannel::~PiNToOmegaChannel(){
54
55 }
56
57 void PiNToOmegaChannel::fillFinalState(FinalState *fs) {
58 Particle * nucleon;
59 Particle * pion;
60 if(particle1->isNucleon()) {
61 nucleon = particle1;
62 pion = particle2;
63 } else {
64 nucleon = particle2;
65 pion = particle1;
66 }
67
68 G4int iso=ParticleTable::getIsospin(nucleon->getType())+ParticleTable::getIsospin(pion->getType());
69 // assert(iso == 1 || iso == -1);
70 if (iso == 1) {
71 nucleon->setType(Proton);
72 }
73 else if (iso == -1) {
74 nucleon->setType(Neutron);
75 }
76 pion->setType(Omega);
77 #ifdef INCLXX_IN_GEANT4_MODE
78 // Erase the parent resonance information of the nucleon and pion
79 nucleon->setParentResonancePDGCode(0);
80 nucleon->setParentResonanceID(0);
81 pion->setParentResonancePDGCode(0);
82 pion->setParentResonanceID(0);
83 #endif
84 // nucleon->setEnergy(std::sqrt((nucleon->getMass())*(nucleon->getMass())+(mom_nucleon.mag()*mom_nucleon.mag())));
85 // pion->setEnergy(std::sqrt((pion->getMass())*(pion->getMass())+(mom_nucleon.mag()*mom_nucleon.mag())));
86 G4double sh=nucleon->getEnergy()+pion->getEnergy();
87 G4double mn=nucleon->getMass();
88 G4double me=pion->getMass();
89 G4double en=(sh*sh+mn*mn-me*me)/(2*sh);
90 nucleon->setEnergy(en);
91 G4double ee=std::sqrt(en*en-mn*mn+me*me);
92 pion->setEnergy(ee);
93 G4double pn=std::sqrt(en*en-mn*mn);
94
95 ThreeVector mom_nucleon = Random::normVector(pn);
96
97 nucleon->setMomentum(mom_nucleon);
98 pion->setMomentum(-mom_nucleon);
99
100 fs->addModifiedParticle(nucleon);
101 fs->addModifiedParticle(pion);
102 }
103
104 }
105