Geant4 11.2.2
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 ()
 

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#ifdef INCLXX_IN_GEANT4_MODE
113 // Erase the parent resonance information of the initial particles
114 particle1->setParentResonancePDGCode(0);
115 particle1->setParentResonanceID(0);
116 particle2->setParentResonancePDGCode(0);
117 particle2->setParentResonanceID(0);
118#endif
119 //nbr_particle += nbr_pions;
120
121 ParticleList list;
122 ParticleType PionType = PiZero;
123 const ThreeVector &rcol1 = pion_initial->getPosition();
124 const ThreeVector zero;
125
126 // (pip piz pim) (sp sz sm) (L S Kb)
127 //pip_p 0.63 0.26 0.11 0.73 0.25 0.02 0.42 0.49 0.09 // inital
128 //pip_p 0.54 0.26 0.20 0.73 0.25 0.02 0.42 0.49 0.09 // choice
129 G4bool pip_p = (std::abs(iso) == 3);
130 //piz_p 0.32 0.45 0.23 0.52 0.40 0.08 0.40 0.41 0.19
131 G4bool piz_p = (ParticleTable::getIsospin(pion_initial->getType()) == 0);
132 //pim_p 0.18 0.37 0.45 0.20 0.63 0.17 0.39 0.33 0.28
133 G4bool pim_p = (!pip_p && !piz_p);
134
135 for(Int_t i=0; i<nbr_pions; i++){
136 Particle *pion = new Particle(PionType,zero,rcol1);
137 if(available_iso-std::abs(iso-iso_system) >= 4){
138 rdm = Random::shoot();
139 if((pip_p && rdm < 0.54) || (piz_p && rdm < 0.32) || (pim_p && rdm < 0.45)){
140 pion->setType(ParticleTable::getPionType(G4int(Math::sign(iso))*2)); //pip/pip/pim
141 iso_system += 2*G4int(Math::sign(iso));
142 available_iso -= 2;
143 }
144 else if((pip_p && rdm < 0.80) || (piz_p && rdm < 0.77) || (pim_p && rdm < 0.82)){
145 pion->setType(PiZero);
146 available_iso -= 2;
147 }
148 else{
149 pion->setType(ParticleTable::getPionType(-G4int(Math::sign(iso))*2));
150 iso_system -= 2*G4int(Math::sign(iso));
151 available_iso -= 2;
152 }
153 }
154 else if(available_iso-std::abs(iso-iso_system) == 2){
155 rdm = Random::shoot();
156 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)) ||
157 (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)) ||
158 (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))){
159 pion->setType(PiZero);
160 available_iso -= 2;
161 }
162 else{
163 pion->setType(ParticleTable::getPionType(Math::sign(iso-iso_system)*2));
164 iso_system += Math::sign(iso-iso_system)*2;
165 available_iso -= 2;
166 }
167 }
168 else if(available_iso-std::abs(iso-iso_system) == 0){
169 pion->setType(ParticleTable::getPionType(Math::sign(iso-iso_system)*2));
170 iso_system += Math::sign(iso-iso_system)*2;
171 available_iso -= 2;
172 }
173 else INCL_ERROR("Pion Generation Problem in NpiToMissingStrangenessChannel" << '\n');
174 list.push_back(pion);
175 }
176
177 if(nucleon_initial->isLambda()){ // K-Lambda
178// assert(available_iso == 1);
179 pion_initial->setType(ParticleTable::getKaonType(iso-iso_system));
180 }
181 else if(min_pions == 1){ // N-K-Kb chosen
182// assert(available_iso == 3);
183 Particle *antikaon = new Particle(KMinus,zero,rcol1);
184 if(std::abs(iso-iso_system) == 3){
185 pion_initial->setType(ParticleTable::getKaonType((iso-iso_system)/3));
186 nucleon_initial->setType(ParticleTable::getNucleonType((iso-iso_system)/3));
187 antikaon->setType(ParticleTable::getAntiKaonType((iso-iso_system)/3));
188 }
189 else if(std::abs(iso-iso_system) == 1){ // equi-repartition
190 rdm = G4int(Random::shoot()*3.)-1;
191 nucleon_initial->setType(ParticleTable::getNucleonType((G4int(rdm+0.5)*2-1)*(iso_system-iso)));
192 pion_initial->setType(ParticleTable::getKaonType((std::abs(rdm*2)-1)*(iso-iso_system)));
193 antikaon->setType(ParticleTable::getAntiKaonType((G4int(rdm-0.5)*2+1)*(iso-iso_system)));
194 }
195 else INCL_ERROR("Isospin non-conservation in NNToMissingStrangenessChannel" << '\n');
196 list.push_back(antikaon);
197 nbr_pions += 1; // need for addCreatedParticle loop
198 }
199 else{// Sigma-K
200// assert(available_iso == 3);
201 if(std::abs(iso-iso_system) == 3){
202 pion_initial->setType(ParticleTable::getKaonType((iso-iso_system)/3));
203 nucleon_initial->setType(ParticleTable::getSigmaType((iso-iso_system)*2/3));
204 }
205 else if(std::abs(iso-iso_system) == 1){
206 rdm = Random::shoot();
207 if((pip_p && rdm < 0.73) || (piz_p && rdm < 0.32) || (pim_p && rdm < 0.45)){
208 nucleon_initial->setType(SigmaZero);
209 pion_initial->setType(ParticleTable::getKaonType(iso-iso_system));
210 }
211 else{
212 nucleon_initial->setType(ParticleTable::getSigmaType((iso-iso_system)*2));
213 pion_initial->setType(ParticleTable::getKaonType(iso_system-iso));
214 }
215 }
216 else INCL_ERROR("Isospin non-conservation in NNToMissingStrangenessChannel" << '\n');
217 }
218
219 list.push_back(pion_initial);
220 list.push_back(nucleon_initial);
221
222 PhaseSpaceGenerator::generateBiased(sqrtS, list, list.size()-1, angularSlope);
223
224 fs->addModifiedParticle(pion_initial);
225 fs->addModifiedParticle(nucleon_initial);
226 for(Int_t i=0; i<nbr_pions; i++) fs->addCreatedParticle(list[i]);
227
228 }
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::setParentResonancePDGCode
void setParentResonancePDGCode(const G4int parentPDGCode)
Definition G4INCLParticle.hh:1198
G4INCL::Particle::setParentResonanceID
void setParentResonanceID(const G4int parentID)
Definition G4INCLParticle.hh:1200
G4INCL::Particle::isPion
G4bool isPion() const
Is this a pion?
Definition G4INCLParticle.hh:402
G4INCL::Particle::getType
G4INCL::ParticleType getType() const
Definition G4INCLParticle.hh:187
G4INCL::KinematicsUtils::totalEnergyInCM
G4double totalEnergyInCM(Particle const *const p1, Particle const *const p2)
Definition G4INCLKinematicsUtils.cc:121
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:162
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:1537
G4INCL::ParticleTable::getSigmaType
ParticleType getSigmaType(const G4int isosp)
Get the type of sigma.
Definition G4INCLParticleTable.cc:1481
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:972
G4INCL::ParticleTable::getIsospin
G4int getIsospin(const ParticleType t)
Get the isospin of a particle.
Definition G4INCLParticleTable.cc:531
G4INCL::ParticleTable::getNucleonType
ParticleType getNucleonType(const G4int isosp)
Get the type of nucleon.
Definition G4INCLParticleTable.cc:1455
G4INCL::ParticleTable::getPionType
ParticleType getPionType(const G4int isosp)
Get the type of pion.
Definition G4INCLParticleTable.cc:1442
G4INCL::ParticleTable::getAntiKaonType
ParticleType getAntiKaonType(const G4int isosp)
Get the type of antikaon.
Definition G4INCLParticleTable.cc:1547
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
The documentation for this class was generated from the following files: