Geant4 10.7.0
Toolkit for the simulation of the passage of particles through matter
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Public Member Functions | List of all members
G4INCL::NpiToMissingStrangenessChannel Class Reference

#include <G4INCLNpiToMissingStrangenessChannel.hh>

+ Inheritance diagram for G4INCL::NpiToMissingStrangenessChannel:

Public Member Functions

 NpiToMissingStrangenessChannel (Particle *, Particle *)
 
virtual ~NpiToMissingStrangenessChannel ()
 
void fillFinalState (FinalState *fs)
 
- Public Member Functions inherited from G4INCL::IChannel
 IChannel ()
 
virtual ~IChannel ()
 
FinalState * getFinalState ()
 
virtual void fillFinalState (FinalState *fs)=0
 

Detailed Description

Definition at line 47 of file G4INCLNpiToMissingStrangenessChannel.hh.

Constructor & Destructor Documentation

◆ NpiToMissingStrangenessChannel()

G4INCL::NpiToMissingStrangenessChannel::NpiToMissingStrangenessChannel ( Particle *  p1,
Particle *  p2 
)

Definition at line 51 of file G4INCLNpiToMissingStrangenessChannel.cc.

52 : particle1(p1), particle2(p2)
53 {}

◆ ~NpiToMissingStrangenessChannel()

G4INCL::NpiToMissingStrangenessChannel::~NpiToMissingStrangenessChannel ( )
virtual

Definition at line 55 of file G4INCLNpiToMissingStrangenessChannel.cc.

55{}

Member Function Documentation

◆ fillFinalState()

void G4INCL::NpiToMissingStrangenessChannel::fillFinalState ( FinalState *  fs)
virtual

Implements G4INCL::IChannel.

Definition at line 57 of file G4INCLNpiToMissingStrangenessChannel.cc.

57 {
58
59 const G4double sqrtS = KinematicsUtils::totalEnergyInCM(particle1, particle2); // MeV /!\/!\/!\.
60// assert(sqrtS > 2.240); // ! > 2.109 Not supposed to be under 2.244 GeV.
61
62 const G4int iso = ParticleTable::getIsospin(particle1->getType()) + ParticleTable::getIsospin(particle2->getType());
63// assert(iso == -3 || iso == -1 || iso == 1 || iso == 3);
64 G4int iso_system = 0;
65 G4int available_iso = 0;
66 G4int nbr_pions = 0;
67 G4int min_pions = 0;
68 G4int max_pions = 0;
69
70 Particle *pion_initial;
71 Particle *nucleon_initial;
72
73 if(particle1->isPion()){
74 pion_initial = particle1;
75 nucleon_initial = particle2;
76 }
77 else{
78 pion_initial = particle2;
79 nucleon_initial = particle1;
80 }
81 const G4double pLab = 0.001*KinematicsUtils::momentumInLab(pion_initial, nucleon_initial); // GeV /!\/!\/!\.
82
83 G4double rdm = Random::shoot();
84
85 G4int nbr_particle = 2;
86
87 if(rdm < 0.35){
88 // Lambda-K chosen
89 nucleon_initial->setType(Lambda);
90 available_iso = 1;
91 min_pions = 3;
92 max_pions = G4int((sqrtS-ParticleTable::getINCLMass(Lambda)-ParticleTable::getINCLMass(KZero)-10.)/ParticleTable::getINCLMass(PiPlus));
93 }
94 else if((iso == 0 && rdm < 0.55) || rdm < 0.5){
95 // N-K-Kb chosen
96 nbr_particle++;
97 available_iso = 3;
98 min_pions = 1;
99 max_pions = G4int((sqrtS-ParticleTable::getINCLMass(Proton)-2.*ParticleTable::getINCLMass(KZero)-10.)/ParticleTable::getINCLMass(PiPlus));
100 }
101 else{
102 // Sigma-K chosen
103 available_iso = 3;
104 min_pions = 3;
105 max_pions = G4int((sqrtS-ParticleTable::getINCLMass(SigmaMinus)-ParticleTable::getINCLMass(KZero)-10.)/ParticleTable::getINCLMass(PiPlus));
106 }
107 // Gaussian noise + mean value nbr pions fonction energy (choice)
108 G4double intermediaire = min_pions + Random::gauss(2) + std::sqrt(pLab-2.2);
109 nbr_pions = std::min(max_pions,std::max(min_pions,G4int(intermediaire )));
110
111 available_iso += nbr_pions*2;
112 nbr_particle += nbr_pions;
113
114 ParticleList list;
115 ParticleType PionType = PiZero;
116 const ThreeVector &rcol1 = pion_initial->getPosition();
117 const ThreeVector zero;
118
119 // (pip piz pim) (sp sz sm) (L S Kb)
120 //pip_p 0.63 0.26 0.11 0.73 0.25 0.02 0.42 0.49 0.09 // inital
121 //pip_p 0.54 0.26 0.20 0.73 0.25 0.02 0.42 0.49 0.09 // choice
122 G4bool pip_p = (std::abs(iso) == 3);
123 //piz_p 0.32 0.45 0.23 0.52 0.40 0.08 0.40 0.41 0.19
124 G4bool piz_p = (ParticleTable::getIsospin(pion_initial->getType()) == 0);
125 //pim_p 0.18 0.37 0.45 0.20 0.63 0.17 0.39 0.33 0.28
126 G4bool pim_p = (!pip_p && !piz_p);
127
128 for(Int_t i=0; i<nbr_pions; i++){
129 Particle *pion = new Particle(PionType,zero,rcol1);
130 if(available_iso-std::abs(iso-iso_system) >= 4){
131 rdm = Random::shoot();
132 if((pip_p && rdm < 0.54) || (piz_p && rdm < 0.32) || (pim_p && rdm < 0.45)){
133 pion->setType(ParticleTable::getPionType(G4int(Math::sign(iso))*2)); //pip/pip/pim
134 iso_system += 2*G4int(Math::sign(iso));
135 available_iso -= 2;
136 }
137 else if((pip_p && rdm < 0.80) || (piz_p && rdm < 0.77) || (pim_p && rdm < 0.82)){
138 pion->setType(PiZero);
139 available_iso -= 2;
140 }
141 else{
142 pion->setType(ParticleTable::getPionType(-G4int(Math::sign(iso))*2));
143 iso_system -= 2*G4int(Math::sign(iso));
144 available_iso -= 2;
145 }
146 }
147 else if(available_iso-std::abs(iso-iso_system) == 2){
148 rdm = Random::shoot();
149 if((pip_p && rdm < 0.26/0.37 && (Math::sign(iso)*Math::sign(iso-iso_system)+1)) || (pip_p && rdm < 0.26/0.89 && (Math::sign(iso)*Math::sign(iso-iso_system)-1)) ||
150 (piz_p && rdm < 0.45/0.68 && (Math::sign(iso)*Math::sign(iso-iso_system)+1)) || (piz_p && rdm < 0.45/0.77 && (Math::sign(iso)*Math::sign(iso-iso_system)-1)) ||
151 (pim_p && rdm < 0.37/0.82 && (Math::sign(iso)*Math::sign(iso-iso_system)+1)) || (piz_p && rdm < 0.37/0.55 && (Math::sign(iso)*Math::sign(iso-iso_system)-1))){
152 pion->setType(PiZero);
153 available_iso -= 2;
154 }
155 else{
156 pion->setType(ParticleTable::getPionType(Math::sign(iso-iso_system)*2));
157 iso_system += Math::sign(iso-iso_system)*2;
158 available_iso -= 2;
159 }
160 }
161 else if(available_iso-std::abs(iso-iso_system) == 0){
162 pion->setType(ParticleTable::getPionType(Math::sign(iso-iso_system)*2));
163 iso_system += Math::sign(iso-iso_system)*2;
164 available_iso -= 2;
165 }
166 else INCL_ERROR("Pion Generation Problem in NpiToMissingStrangenessChannel" << '\n');
167 list.push_back(pion);
168 }
169
170 if(nucleon_initial->isLambda()){ // K-Lambda
171// assert(available_iso == 1);
172 pion_initial->setType(ParticleTable::getKaonType(iso-iso_system));
173 }
174 else if(min_pions == 1){ // N-K-Kb chosen
175// assert(available_iso == 3);
176 Particle *antikaon = new Particle(KMinus,zero,rcol1);
177 if(std::abs(iso-iso_system) == 3){
178 pion_initial->setType(ParticleTable::getKaonType((iso-iso_system)/3));
179 nucleon_initial->setType(ParticleTable::getNucleonType((iso-iso_system)/3));
180 antikaon->setType(ParticleTable::getAntiKaonType((iso-iso_system)/3));
181 }
182 else if(std::abs(iso-iso_system) == 1){ // equi-repartition
183 rdm = G4int(Random::shoot()*3.)-1;
184 nucleon_initial->setType(ParticleTable::getNucleonType((G4int(rdm+0.5)*2-1)*(iso_system-iso)));
185 pion_initial->setType(ParticleTable::getKaonType((std::abs(rdm*2)-1)*(iso-iso_system)));
186 antikaon->setType(ParticleTable::getAntiKaonType((G4int(rdm-0.5)*2+1)*(iso-iso_system)));
187 }
188 else INCL_ERROR("Isospin non-conservation in NNToMissingStrangenessChannel" << '\n');
189 list.push_back(antikaon);
190 nbr_pions += 1; // need for addCreatedParticle loop
191 }
192 else{// Sigma-K
193// assert(available_iso == 3);
194 if(std::abs(iso-iso_system) == 3){
195 pion_initial->setType(ParticleTable::getKaonType((iso-iso_system)/3));
196 nucleon_initial->setType(ParticleTable::getSigmaType((iso-iso_system)*2/3));
197 }
198 else if(std::abs(iso-iso_system) == 1){
199 rdm = Random::shoot();
200 if((pip_p && rdm < 0.73) || (piz_p && rdm < 0.32) || (pim_p && rdm < 0.45)){
201 nucleon_initial->setType(SigmaZero);
202 pion_initial->setType(ParticleTable::getKaonType(iso-iso_system));
203 }
204 else{
205 nucleon_initial->setType(ParticleTable::getSigmaType((iso-iso_system)*2));
206 pion_initial->setType(ParticleTable::getKaonType(iso_system-iso));
207 }
208 }
209 else INCL_ERROR("Isospin non-conservation in NNToMissingStrangenessChannel" << '\n');
210 }
211
212 list.push_back(pion_initial);
213 list.push_back(nucleon_initial);
214
215 PhaseSpaceGenerator::generateBiased(sqrtS, list, list.size()-1, angularSlope);
216
217 fs->addModifiedParticle(pion_initial);
218 fs->addModifiedParticle(nucleon_initial);
219 for(Int_t i=0; i<nbr_pions; i++) fs->addCreatedParticle(list[i]);
220
221 }
INCL_ERROR
#define INCL_ERROR(x)
Definition: G4INCLLogger.hh:225
G4double
double G4double
Definition: G4Types.hh:83
G4bool
bool G4bool
Definition: G4Types.hh:86
G4int
int G4int
Definition: G4Types.hh:85
G4INCL::Particle::isPion
G4bool isPion() const
Is this a pion?
Definition: G4INCLParticle.hh:343
G4INCL::Particle::getType
G4INCL::ParticleType getType() const
Definition: G4INCLParticle.hh:178
G4INCL::KinematicsUtils::totalEnergyInCM
G4double totalEnergyInCM(Particle const *const p1, Particle const *const p2)
Definition: G4INCLKinematicsUtils.cc:94
G4INCL::KinematicsUtils::momentumInLab
G4double momentumInLab(Particle const *const p1, Particle const *const p2)
gives the momentum in the lab frame of two particles.
Definition: G4INCLKinematicsUtils.cc:135
G4INCL::Math::sign
G4int sign(const T t)
Definition: G4INCLGlobals.hh:107
G4INCL::ParticleTable::getKaonType
ParticleType getKaonType(const G4int isosp)
Get the type of kaon.
Definition: G4INCLParticleTable.cc:1278
G4INCL::ParticleTable::getSigmaType
ParticleType getSigmaType(const G4int isosp)
Get the type of sigma.
Definition: G4INCLParticleTable.cc:1265
G4INCL::ParticleTable::getINCLMass
G4double getINCLMass(const G4int A, const G4int Z, const G4int S)
Get INCL nuclear mass (in MeV/c^2)
Definition: G4INCLParticleTable.cc:794
G4INCL::ParticleTable::getIsospin
G4int getIsospin(const ParticleType t)
Get the isospin of a particle.
Definition: G4INCLParticleTable.cc:478
G4INCL::ParticleTable::getNucleonType
ParticleType getNucleonType(const G4int isosp)
Get the type of nucleon.
Definition: G4INCLParticleTable.cc:1238
G4INCL::ParticleTable::getPionType
ParticleType getPionType(const G4int isosp)
Get the type of pion.
Definition: G4INCLParticleTable.cc:1225
G4INCL::ParticleTable::getAntiKaonType
ParticleType getAntiKaonType(const G4int isosp)
Get the type of antikaon.
Definition: G4INCLParticleTable.cc:1288
G4INCL::PhaseSpaceGenerator::generateBiased
void generateBiased(const G4double sqrtS, ParticleList &particles, const size_t index, const G4double slope)
Generate a biased event in the CM system.
Definition: G4INCLPhaseSpaceGenerator.cc:98
G4INCL::Random::gauss
G4double gauss(G4double sigma=1.)
Definition: G4INCLRandom.cc:137
G4INCL::Random::shoot
G4double shoot()
Definition: G4INCLRandom.cc:93
G4INCL::Int_t
G4int Int_t
Definition: G4INCLEventInfo.hh:60
G4InuclParticleNames::pion
G4bool pion(G4int ityp)
Definition: G4InuclParticleNames.hh:90
The documentation for this class was generated from the following files: