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26 // $Id: G4NuMuNucleusCcModel.cc 91806 2015-08- 26 // $Id: G4NuMuNucleusCcModel.cc 91806 2015-08-06 12:20:45Z gcosmo $
27 // 27 //
28 // Geant4 Header : G4NuMuNucleusCcModel 28 // Geant4 Header : G4NuMuNucleusCcModel
29 // 29 //
30 // Author : V.Grichine 12.2.19 30 // Author : V.Grichine 12.2.19
31 // 31 //
32 32
33 #include <iostream> 33 #include <iostream>
34 #include <fstream> 34 #include <fstream>
35 #include <sstream> 35 #include <sstream>
36 36
37 #include "G4NuMuNucleusCcModel.hh" 37 #include "G4NuMuNucleusCcModel.hh"
38 // #include "G4NuMuNuclCcDistrKR.hh" 38 // #include "G4NuMuNuclCcDistrKR.hh"
39 39
40 // #include "G4NuMuResQX.hh" 40 // #include "G4NuMuResQX.hh"
41 41
42 #include "G4SystemOfUnits.hh" 42 #include "G4SystemOfUnits.hh"
43 #include "G4ParticleTable.hh" 43 #include "G4ParticleTable.hh"
44 #include "G4ParticleDefinition.hh" 44 #include "G4ParticleDefinition.hh"
45 #include "G4IonTable.hh" 45 #include "G4IonTable.hh"
46 #include "Randomize.hh" 46 #include "Randomize.hh"
47 #include "G4RandomDirection.hh" 47 #include "G4RandomDirection.hh"
48 // #include "G4Threading.hh" 48 // #include "G4Threading.hh"
49 49
50 // #include "G4Integrator.hh" 50 // #include "G4Integrator.hh"
51 #include "G4DataVector.hh" 51 #include "G4DataVector.hh"
52 #include "G4PhysicsTable.hh" 52 #include "G4PhysicsTable.hh"
53 /* 53 /*
54 #include "G4CascadeInterface.hh" 54 #include "G4CascadeInterface.hh"
55 // #include "G4BinaryCascade.hh" 55 // #include "G4BinaryCascade.hh"
56 #include "G4TheoFSGenerator.hh" 56 #include "G4TheoFSGenerator.hh"
57 #include "G4LundStringFragmentation.hh" 57 #include "G4LundStringFragmentation.hh"
58 #include "G4ExcitedStringDecay.hh" 58 #include "G4ExcitedStringDecay.hh"
59 #include "G4FTFModel.hh" 59 #include "G4FTFModel.hh"
60 // #include "G4BinaryCascade.hh" 60 // #include "G4BinaryCascade.hh"
61 #include "G4HadFinalState.hh" 61 #include "G4HadFinalState.hh"
62 #include "G4HadSecondary.hh" 62 #include "G4HadSecondary.hh"
63 #include "G4HadronicInteractionRegistry.hh" 63 #include "G4HadronicInteractionRegistry.hh"
64 // #include "G4INCLXXInterface.hh" 64 // #include "G4INCLXXInterface.hh"
65 #include "G4QGSModel.hh" 65 #include "G4QGSModel.hh"
66 #include "G4QGSMFragmentation.hh" 66 #include "G4QGSMFragmentation.hh"
67 #include "G4QGSParticipants.hh" 67 #include "G4QGSParticipants.hh"
68 */ 68 */
69 #include "G4KineticTrack.hh" 69 #include "G4KineticTrack.hh"
70 #include "G4DecayKineticTracks.hh" 70 #include "G4DecayKineticTracks.hh"
71 #include "G4KineticTrackVector.hh" 71 #include "G4KineticTrackVector.hh"
72 #include "G4Fragment.hh" 72 #include "G4Fragment.hh"
73 #include "G4NucleiProperties.hh" 73 #include "G4NucleiProperties.hh"
74 #include "G4ReactionProductVector.hh" 74 #include "G4ReactionProductVector.hh"
75 75
76 #include "G4GeneratorPrecompoundInterface.hh" 76 #include "G4GeneratorPrecompoundInterface.hh"
77 #include "G4PreCompoundModel.hh" 77 #include "G4PreCompoundModel.hh"
78 #include "G4ExcitationHandler.hh" 78 #include "G4ExcitationHandler.hh"
79 79
80 80
81 #include "G4MuonMinus.hh" 81 #include "G4MuonMinus.hh"
82 #include "G4MuonPlus.hh" 82 #include "G4MuonPlus.hh"
83 #include "G4Nucleus.hh" 83 #include "G4Nucleus.hh"
84 #include "G4LorentzVector.hh" 84 #include "G4LorentzVector.hh"
85 85
86 using namespace std; 86 using namespace std;
87 using namespace CLHEP; 87 using namespace CLHEP;
88 88
89 #ifdef G4MULTITHREADED 89 #ifdef G4MULTITHREADED
90 G4Mutex G4NuMuNucleusCcModel::numuNucleusM 90 G4Mutex G4NuMuNucleusCcModel::numuNucleusModel = G4MUTEX_INITIALIZER;
91 #endif 91 #endif
92 92
93 93
94 G4NuMuNucleusCcModel::G4NuMuNucleusCcModel(con 94 G4NuMuNucleusCcModel::G4NuMuNucleusCcModel(const G4String& name)
95 : G4NeutrinoNucleusModel(name) 95 : G4NeutrinoNucleusModel(name)
96 { 96 {
97 fData = fMaster = false; 97 fData = fMaster = false;
98 InitialiseModel(); 98 InitialiseModel();
99 } 99 }
100 100
101 101
102 G4NuMuNucleusCcModel::~G4NuMuNucleusCcModel() 102 G4NuMuNucleusCcModel::~G4NuMuNucleusCcModel()
103 {} 103 {}
104 104
105 105
106 void G4NuMuNucleusCcModel::ModelDescription(st 106 void G4NuMuNucleusCcModel::ModelDescription(std::ostream& outFile) const
107 { 107 {
108 108
109 outFile << "G4NuMuNucleusCcModel is a neut 109 outFile << "G4NuMuNucleusCcModel is a neutrino-nucleus (charge current) scattering\n"
110 << "model which uses the standard 110 << "model which uses the standard model \n"
111 << "transfer parameterization. Th 111 << "transfer parameterization. The model is fully relativistic\n";
112 112
113 } 113 }
114 114
115 ////////////////////////////////////////////// 115 /////////////////////////////////////////////////////////
116 // 116 //
117 // Read data from G4PARTICLEXSDATA (locally PA 117 // Read data from G4PARTICLEXSDATA (locally PARTICLEXSDATA)
118 118
119 void G4NuMuNucleusCcModel::InitialiseModel() 119 void G4NuMuNucleusCcModel::InitialiseModel()
120 { 120 {
121 G4String pName = "nu_mu"; 121 G4String pName = "nu_mu";
122 // G4String pName = "anti_nu_mu"; 122 // G4String pName = "anti_nu_mu";
123 123
124 G4int nSize(0), i(0), j(0), k(0); 124 G4int nSize(0), i(0), j(0), k(0);
125 125
126 if(!fData) 126 if(!fData)
127 { 127 {
128 #ifdef G4MULTITHREADED 128 #ifdef G4MULTITHREADED
129 G4MUTEXLOCK(&numuNucleusModel); 129 G4MUTEXLOCK(&numuNucleusModel);
130 if(!fData) 130 if(!fData)
131 { 131 {
132 #endif 132 #endif
133 fMaster = true; 133 fMaster = true;
134 #ifdef G4MULTITHREADED 134 #ifdef G4MULTITHREADED
135 } 135 }
136 G4MUTEXUNLOCK(&numuNucleusModel); 136 G4MUTEXUNLOCK(&numuNucleusModel);
137 #endif 137 #endif
138 } 138 }
139 139
140 if(fMaster) 140 if(fMaster)
141 { 141 {
142 const char* path = G4FindDataDir("G4PARTIC << 142 char* path = getenv("G4PARTICLEXSDATA");
143 std::ostringstream ost1, ost2, ost3, ost4; 143 std::ostringstream ost1, ost2, ost3, ost4;
144 ost1 << path << "/" << "neutrino" << "/" < 144 ost1 << path << "/" << "neutrino" << "/" << pName << "/xarraycckr";
145 145
146 std::ifstream filein1( ost1.str().c_str() 146 std::ifstream filein1( ost1.str().c_str() );
147 147
148 // filein.open("$PARTICLEXSDATA/"); 148 // filein.open("$PARTICLEXSDATA/");
149 149
150 filein1>>nSize; 150 filein1>>nSize;
151 151
152 for( k = 0; k < fNbin; ++k ) 152 for( k = 0; k < fNbin; ++k )
153 { 153 {
154 for( i = 0; i <= fNbin; ++i ) 154 for( i = 0; i <= fNbin; ++i )
155 { 155 {
156 filein1 >> fNuMuXarrayKR[k][i]; 156 filein1 >> fNuMuXarrayKR[k][i];
157 // G4cout<< fNuMuXarrayKR[k][i] << " 157 // G4cout<< fNuMuXarrayKR[k][i] << " ";
158 } 158 }
159 } 159 }
160 // G4cout<<G4endl<<G4endl; 160 // G4cout<<G4endl<<G4endl;
161 161
162 ost2 << path << "/" << "neutrino" << "/" < 162 ost2 << path << "/" << "neutrino" << "/" << pName << "/xdistrcckr";
163 std::ifstream filein2( ost2.str().c_str() 163 std::ifstream filein2( ost2.str().c_str() );
164 164
165 filein2>>nSize; 165 filein2>>nSize;
166 166
167 for( k = 0; k < fNbin; ++k ) 167 for( k = 0; k < fNbin; ++k )
168 { 168 {
169 for( i = 0; i < fNbin; ++i ) 169 for( i = 0; i < fNbin; ++i )
170 { 170 {
171 filein2 >> fNuMuXdistrKR[k][i]; 171 filein2 >> fNuMuXdistrKR[k][i];
172 // G4cout<< fNuMuXdistrKR[k][i] << " 172 // G4cout<< fNuMuXdistrKR[k][i] << " ";
173 } 173 }
174 } 174 }
175 // G4cout<<G4endl<<G4endl; 175 // G4cout<<G4endl<<G4endl;
176 176
177 ost3 << path << "/" << "neutrino" << "/" < 177 ost3 << path << "/" << "neutrino" << "/" << pName << "/q2arraycckr";
178 std::ifstream filein3( ost3.str().c_str() 178 std::ifstream filein3( ost3.str().c_str() );
179 179
180 filein3>>nSize; 180 filein3>>nSize;
181 181
182 for( k = 0; k < fNbin; ++k ) 182 for( k = 0; k < fNbin; ++k )
183 { 183 {
184 for( i = 0; i <= fNbin; ++i ) 184 for( i = 0; i <= fNbin; ++i )
185 { 185 {
186 for( j = 0; j <= fNbin; ++j ) 186 for( j = 0; j <= fNbin; ++j )
187 { 187 {
188 filein3 >> fNuMuQarrayKR[k][i][j]; 188 filein3 >> fNuMuQarrayKR[k][i][j];
189 // G4cout<< fNuMuQarrayKR[k][i][j] < 189 // G4cout<< fNuMuQarrayKR[k][i][j] << " ";
190 } 190 }
191 } 191 }
192 } 192 }
193 // G4cout<<G4endl<<G4endl; 193 // G4cout<<G4endl<<G4endl;
194 194
195 ost4 << path << "/" << "neutrino" << "/" < 195 ost4 << path << "/" << "neutrino" << "/" << pName << "/q2distrcckr";
196 std::ifstream filein4( ost4.str().c_str() 196 std::ifstream filein4( ost4.str().c_str() );
197 197
198 filein4>>nSize; 198 filein4>>nSize;
199 199
200 for( k = 0; k < fNbin; ++k ) 200 for( k = 0; k < fNbin; ++k )
201 { 201 {
202 for( i = 0; i <= fNbin; ++i ) 202 for( i = 0; i <= fNbin; ++i )
203 { 203 {
204 for( j = 0; j < fNbin; ++j ) 204 for( j = 0; j < fNbin; ++j )
205 { 205 {
206 filein4 >> fNuMuQdistrKR[k][i][j]; 206 filein4 >> fNuMuQdistrKR[k][i][j];
207 // G4cout<< fNuMuQdistrKR[k][i][j] < 207 // G4cout<< fNuMuQdistrKR[k][i][j] << " ";
208 } 208 }
209 } 209 }
210 } 210 }
211 fData = true; 211 fData = true;
212 } 212 }
213 } 213 }
214 214
215 ////////////////////////////////////////////// 215 /////////////////////////////////////////////////////////
216 216
217 G4bool G4NuMuNucleusCcModel::IsApplicable(cons 217 G4bool G4NuMuNucleusCcModel::IsApplicable(const G4HadProjectile & aPart,
218 G4Nucleus & ) << 218 G4Nucleus & targetNucleus)
219 { 219 {
220 G4bool result = false; 220 G4bool result = false;
221 G4String pName = aPart.GetDefinition()->GetP 221 G4String pName = aPart.GetDefinition()->GetParticleName();
222 G4double energy = aPart.GetTotalEnergy(); 222 G4double energy = aPart.GetTotalEnergy();
223 223
224 if( pName == "nu_mu" // || pName == "anti_ 224 if( pName == "nu_mu" // || pName == "anti_nu_mu" )
225 && 225 &&
226 energy > fMinNuEnergy 226 energy > fMinNuEnergy )
227 { 227 {
228 result = true; 228 result = true;
229 } 229 }
>> 230 G4int Z = targetNucleus.GetZ_asInt();
>> 231 Z *= 1;
230 232
231 return result; 233 return result;
232 } 234 }
233 235
234 /////////////////////////////////////////// Cl 236 /////////////////////////////////////////// ClusterDecay ////////////////////////////////////////////////////////////
235 // 237 //
236 // 238 //
237 239
238 G4HadFinalState* G4NuMuNucleusCcModel::ApplyYo 240 G4HadFinalState* G4NuMuNucleusCcModel::ApplyYourself(
239 const G4HadProjectile& aTrack, G4Nucleus& 241 const G4HadProjectile& aTrack, G4Nucleus& targetNucleus)
240 { 242 {
241 theParticleChange.Clear(); 243 theParticleChange.Clear();
242 fProton = f2p2h = fBreak = false; 244 fProton = f2p2h = fBreak = false;
243 fCascade = fString = false; 245 fCascade = fString = false;
244 fLVh = fLVl = fLVt = fLVcpi = G4LorentzVecto 246 fLVh = fLVl = fLVt = fLVcpi = G4LorentzVector(0.,0.,0.,0.);
245 247
246 const G4HadProjectile* aParticle = &aTrack; 248 const G4HadProjectile* aParticle = &aTrack;
247 G4double energy = aParticle->GetTotalEnergy( 249 G4double energy = aParticle->GetTotalEnergy();
248 250
249 G4String pName = aParticle->GetDefinition() 251 G4String pName = aParticle->GetDefinition()->GetParticleName();
250 252
251 if( energy < fMinNuEnergy ) 253 if( energy < fMinNuEnergy )
252 { 254 {
253 theParticleChange.SetEnergyChange(energy); 255 theParticleChange.SetEnergyChange(energy);
254 theParticleChange.SetMomentumChange(aTrack 256 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
255 return &theParticleChange; 257 return &theParticleChange;
256 } 258 }
257 259
258 SampleLVkr( aTrack, targetNucleus); 260 SampleLVkr( aTrack, targetNucleus);
259 261
260 if( fBreak == true || fEmu < fMu ) // ~5*10^ 262 if( fBreak == true || fEmu < fMu ) // ~5*10^-6
261 { 263 {
262 // G4cout<<"ni, "; 264 // G4cout<<"ni, ";
263 theParticleChange.SetEnergyChange(energy); 265 theParticleChange.SetEnergyChange(energy);
264 theParticleChange.SetMomentumChange(aTrack 266 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
265 return &theParticleChange; 267 return &theParticleChange;
266 } 268 }
267 269
268 // LVs of initial state 270 // LVs of initial state
269 271
270 G4LorentzVector lvp1 = aParticle->Get4Moment 272 G4LorentzVector lvp1 = aParticle->Get4Momentum();
271 G4LorentzVector lvt1( 0., 0., 0., fM1 ); 273 G4LorentzVector lvt1( 0., 0., 0., fM1 );
272 G4double mPip = G4ParticleTable::GetParticle 274 G4double mPip = G4ParticleTable::GetParticleTable()->FindParticle(211)->GetPDGMass();
273 275
274 // 1-pi by fQtransfer && nu-energy 276 // 1-pi by fQtransfer && nu-energy
275 G4LorentzVector lvpip1( 0., 0., 0., mPip ); 277 G4LorentzVector lvpip1( 0., 0., 0., mPip );
276 G4LorentzVector lvsum, lv2, lvX; 278 G4LorentzVector lvsum, lv2, lvX;
277 G4ThreeVector eP; 279 G4ThreeVector eP;
278 G4double cost(1.), sint(0.), phi(0.), muMom( 280 G4double cost(1.), sint(0.), phi(0.), muMom(0.), massX2(0.), massX(0.), massR(0.), eCut(0.);
279 G4DynamicParticle* aLept = nullptr; // lepto 281 G4DynamicParticle* aLept = nullptr; // lepton lv
280 282
281 G4int Z = targetNucleus.GetZ_asInt(); 283 G4int Z = targetNucleus.GetZ_asInt();
282 G4int A = targetNucleus.GetA_asInt(); 284 G4int A = targetNucleus.GetA_asInt();
283 G4double mTarg = targetNucleus.AtomicMass(A 285 G4double mTarg = targetNucleus.AtomicMass(A,Z);
284 G4int pdgP(0), qB(0); 286 G4int pdgP(0), qB(0);
285 // G4double mSum = G4ParticleTable::GetParti 287 // G4double mSum = G4ParticleTable::GetParticleTable()->FindParticle(2212)->GetPDGMass() + mPip;
286 288
287 G4int iPi = GetOnePionIndex(energy); 289 G4int iPi = GetOnePionIndex(energy);
288 G4double p1pi = GetNuMuOnePionProb( iPi, ene 290 G4double p1pi = GetNuMuOnePionProb( iPi, energy);
289 291
290 if( p1pi > G4UniformRand() && fCosTheta > 0 292 if( p1pi > G4UniformRand() && fCosTheta > 0.9 ) // && fQtransfer < 0.95*GeV ) // mu- & coherent pion + nucleus
291 { 293 {
292 // lvsum = lvp1 + lvpip1; 294 // lvsum = lvp1 + lvpip1;
293 lvsum = lvp1 + lvt1; 295 lvsum = lvp1 + lvt1;
294 // cost = fCosThetaPi; 296 // cost = fCosThetaPi;
295 cost = fCosTheta; 297 cost = fCosTheta;
296 sint = std::sqrt( (1.0 - cost)*(1.0 + cost 298 sint = std::sqrt( (1.0 - cost)*(1.0 + cost) );
297 phi = G4UniformRand()*CLHEP::twopi; 299 phi = G4UniformRand()*CLHEP::twopi;
298 eP = G4ThreeVector( sint*std::cos(phi), 300 eP = G4ThreeVector( sint*std::cos(phi), sint*std::sin(phi), cost );
299 301
300 // muMom = sqrt(fEmuPi*fEmuPi-fMu*fMu); 302 // muMom = sqrt(fEmuPi*fEmuPi-fMu*fMu);
301 muMom = sqrt(fEmu*fEmu-fMu*fMu); 303 muMom = sqrt(fEmu*fEmu-fMu*fMu);
302 304
303 eP *= muMom; 305 eP *= muMom;
304 306
305 // lv2 = G4LorentzVector( eP, fEmuPi ); 307 // lv2 = G4LorentzVector( eP, fEmuPi );
306 // lv2 = G4LorentzVector( eP, fEmu ); 308 // lv2 = G4LorentzVector( eP, fEmu );
307 lv2 = fLVl; 309 lv2 = fLVl;
308 310
309 // lvX = lvsum - lv2; 311 // lvX = lvsum - lv2;
310 lvX = fLVh; 312 lvX = fLVh;
311 massX2 = lvX.m2(); 313 massX2 = lvX.m2();
312 massX = lvX.m(); 314 massX = lvX.m();
313 massR = fLVt.m(); 315 massR = fLVt.m();
314 316
315 if ( massX2 <= 0. ) // vmg: very rarely ~ 317 if ( massX2 <= 0. ) // vmg: very rarely ~ (1-4)e-6 due to big Q2/x, to be improved
316 { 318 {
317 fCascade = true; 319 fCascade = true;
318 theParticleChange.SetEnergyChange(energy 320 theParticleChange.SetEnergyChange(energy);
319 theParticleChange.SetMomentumChange(aTra 321 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
320 return &theParticleChange; 322 return &theParticleChange;
321 } 323 }
322 fW2 = massX2; 324 fW2 = massX2;
323 325
324 if( pName == "nu_mu" ) aLept = ne 326 if( pName == "nu_mu" ) aLept = new G4DynamicParticle( theMuonMinus, lv2 );
325 // else if( pName == "anti_nu_mu") aLept = 327 // else if( pName == "anti_nu_mu") aLept = new G4DynamicParticle( theMuonPlus, lv2 );
326 else 328 else
327 { 329 {
328 theParticleChange.SetEnergyChange(energy 330 theParticleChange.SetEnergyChange(energy);
329 theParticleChange.SetMomentumChange(aTra 331 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
330 return &theParticleChange; 332 return &theParticleChange;
331 } 333 }
332 if( pName == "nu_mu" ) pdgP = 211; 334 if( pName == "nu_mu" ) pdgP = 211;
333 // else pdgP = -211; 335 // else pdgP = -211;
334 // eCut = fMpi + 0.5*(fMpi*fMpi-massX2)/mT 336 // eCut = fMpi + 0.5*(fMpi*fMpi-massX2)/mTarg; // massX -> fMpi
335 337
336 if( A > 1 ) 338 if( A > 1 )
337 { 339 {
338 eCut = (fMpi + mTarg)*(fMpi + mTarg) - ( 340 eCut = (fMpi + mTarg)*(fMpi + mTarg) - (massX + massR)*(massX + massR);
339 eCut /= 2.*massR; 341 eCut /= 2.*massR;
340 eCut += massX; 342 eCut += massX;
341 } 343 }
342 else eCut = fM1 + fMpi; 344 else eCut = fM1 + fMpi;
343 345
344 if ( lvX.e() > eCut ) // && sqrt( GetW2() 346 if ( lvX.e() > eCut ) // && sqrt( GetW2() ) < 1.4*GeV ) //
345 { 347 {
346 CoherentPion( lvX, pdgP, targetNucleus); 348 CoherentPion( lvX, pdgP, targetNucleus);
347 } 349 }
348 else 350 else
349 { 351 {
350 fCascade = true; 352 fCascade = true;
351 theParticleChange.SetEnergyChange(energy 353 theParticleChange.SetEnergyChange(energy);
352 theParticleChange.SetMomentumChange(aTra 354 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
353 return &theParticleChange; 355 return &theParticleChange;
354 } 356 }
355 theParticleChange.AddSecondary( aLept, fSe << 357 theParticleChange.AddSecondary( aLept );
356 358
357 return &theParticleChange; 359 return &theParticleChange;
358 } 360 }
359 else // lepton part in lab 361 else // lepton part in lab
360 { 362 {
361 lvsum = lvp1 + lvt1; 363 lvsum = lvp1 + lvt1;
362 cost = fCosTheta; 364 cost = fCosTheta;
363 sint = std::sqrt( (1.0 - cost)*(1.0 + cost 365 sint = std::sqrt( (1.0 - cost)*(1.0 + cost) );
364 phi = G4UniformRand()*CLHEP::twopi; 366 phi = G4UniformRand()*CLHEP::twopi;
365 eP = G4ThreeVector( sint*std::cos(phi), 367 eP = G4ThreeVector( sint*std::cos(phi), sint*std::sin(phi), cost );
366 368
367 muMom = sqrt(fEmu*fEmu-fMu*fMu); 369 muMom = sqrt(fEmu*fEmu-fMu*fMu);
368 370
369 eP *= muMom; 371 eP *= muMom;
370 372
371 lv2 = G4LorentzVector( eP, fEmu ); 373 lv2 = G4LorentzVector( eP, fEmu );
372 lv2 = fLVl; 374 lv2 = fLVl;
373 lvX = lvsum - lv2; 375 lvX = lvsum - lv2;
374 lvX = fLVh; 376 lvX = fLVh;
375 massX2 = lvX.m2(); 377 massX2 = lvX.m2();
376 378
377 if ( massX2 <= 0. ) // vmg: very rarely ~ 379 if ( massX2 <= 0. ) // vmg: very rarely ~ (1-4)e-6 due to big Q2/x, to be improved
378 { 380 {
379 fCascade = true; 381 fCascade = true;
380 theParticleChange.SetEnergyChange(energy 382 theParticleChange.SetEnergyChange(energy);
381 theParticleChange.SetMomentumChange(aTra 383 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
382 return &theParticleChange; 384 return &theParticleChange;
383 } 385 }
384 fW2 = massX2; 386 fW2 = massX2;
385 387
386 if( pName == "nu_mu" ) aLept = ne 388 if( pName == "nu_mu" ) aLept = new G4DynamicParticle( theMuonMinus, lv2 );
387 // else if( pName == "anti_nu_mu") aLept = 389 // else if( pName == "anti_nu_mu") aLept = new G4DynamicParticle( theMuonPlus, lv2 );
388 else 390 else
389 { 391 {
390 theParticleChange.SetEnergyChange(energy 392 theParticleChange.SetEnergyChange(energy);
391 theParticleChange.SetMomentumChange(aTra 393 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
392 return &theParticleChange; 394 return &theParticleChange;
393 } 395 }
394 theParticleChange.AddSecondary( aLept, fSe << 396 theParticleChange.AddSecondary( aLept );
395 } 397 }
396 398
397 // hadron part 399 // hadron part
398 400
399 fRecoil = nullptr; 401 fRecoil = nullptr;
400 402
401 if( A == 1 ) 403 if( A == 1 )
402 { 404 {
403 if( pName == "nu_mu" ) qB = 2; 405 if( pName == "nu_mu" ) qB = 2;
404 // else qB = 0; 406 // else qB = 0;
405 407
406 // if( G4UniformRand() > 0.1 ) // > 0.999 408 // if( G4UniformRand() > 0.1 ) // > 0.9999 ) // > 0.0001 ) //
407 { 409 {
408 ClusterDecay( lvX, qB ); 410 ClusterDecay( lvX, qB );
409 } 411 }
410 return &theParticleChange; 412 return &theParticleChange;
411 } 413 }
412 /* 414 /*
413 // else 415 // else
414 { 416 {
415 if( pName == "nu_mu" ) pdgP = 211; 417 if( pName == "nu_mu" ) pdgP = 211;
416 else pdgP = -211; 418 else pdgP = -211;
417 419
418 420
419 if ( fQtransfer < 0.95*GeV ) // < 0.35*G 421 if ( fQtransfer < 0.95*GeV ) // < 0.35*GeV ) //
420 { 422 {
421 if( lvX.m() > mSum ) CoherentPion( lvX, pdgP 423 if( lvX.m() > mSum ) CoherentPion( lvX, pdgP, targetNucleus);
422 } 424 }
423 } 425 }
424 return &theParticleChange; 426 return &theParticleChange;
425 } 427 }
426 */ 428 */
427 G4Nucleus recoil; 429 G4Nucleus recoil;
428 G4double rM(0.), ratio = G4double(Z)/G4doubl 430 G4double rM(0.), ratio = G4double(Z)/G4double(A);
429 431
430 if( ratio > G4UniformRand() ) // proton is e 432 if( ratio > G4UniformRand() ) // proton is excited
431 { 433 {
432 fProton = true; 434 fProton = true;
433 recoil = G4Nucleus(A-1,Z-1); 435 recoil = G4Nucleus(A-1,Z-1);
434 fRecoil = &recoil; 436 fRecoil = &recoil;
435 rM = recoil.AtomicMass(A-1,Z-1); 437 rM = recoil.AtomicMass(A-1,Z-1);
436 438
437 if( pName == "nu_mu" ) // (++) state -> p 439 if( pName == "nu_mu" ) // (++) state -> p + pi+
438 { 440 {
439 fMt = G4ParticleTable::GetParticleTable( 441 fMt = G4ParticleTable::GetParticleTable()->FindParticle(2212)->GetPDGMass()
440 + G4ParticleTable::GetParticleTable( 442 + G4ParticleTable::GetParticleTable()->FindParticle(211)->GetPDGMass();
441 } 443 }
442 else // (0) state -> p + pi-, n + pi0 444 else // (0) state -> p + pi-, n + pi0
443 { 445 {
444 // fMt = G4ParticleTable::GetParticleTab 446 // fMt = G4ParticleTable::GetParticleTable()->FindParticle(2212)->GetPDGMass()
445 // + G4ParticleTable::GetParticleTab 447 // + G4ParticleTable::GetParticleTable()->FindParticle(-211)->GetPDGMass();
446 } 448 }
447 } 449 }
448 else // excited neutron 450 else // excited neutron
449 { 451 {
450 fProton = false; 452 fProton = false;
451 recoil = G4Nucleus(A-1,Z); 453 recoil = G4Nucleus(A-1,Z);
452 fRecoil = &recoil; 454 fRecoil = &recoil;
453 rM = recoil.AtomicMass(A-1,Z); 455 rM = recoil.AtomicMass(A-1,Z);
454 456
455 if( pName == "nu_mu" ) // (+) state -> n + 457 if( pName == "nu_mu" ) // (+) state -> n + pi+
456 { 458 {
457 fMt = G4ParticleTable::GetParticleTable( 459 fMt = G4ParticleTable::GetParticleTable()->FindParticle(2112)->GetPDGMass()
458 + G4ParticleTable::GetParticleTable( 460 + G4ParticleTable::GetParticleTable()->FindParticle(211)->GetPDGMass();
459 } 461 }
460 else // (-) state -> n + pi-, // n + pi0 462 else // (-) state -> n + pi-, // n + pi0
461 { 463 {
462 // fMt = G4ParticleTable::GetParticleTab 464 // fMt = G4ParticleTable::GetParticleTable()->FindParticle(2112)->GetPDGMass()
463 // + G4ParticleTable::GetParticleTab 465 // + G4ParticleTable::GetParticleTable()->FindParticle(-211)->GetPDGMass();
464 } 466 }
465 } 467 }
466 // G4int index = GetEnergyIndex(energy << 468 G4int index = GetEnergyIndex(energy);
467 G4int nepdg = aParticle->GetDefinition()->Ge << 469 G4double qeTotRat = GetNuMuQeTotRat(index, energy);
468 <<
469 G4double qeTotRat; // = GetNuMuQeTotRat(inde <<
470 qeTotRat = CalculateQEratioA( Z, A, energy, <<
471 470
472 G4ThreeVector dX = (lvX.vect()).unit(); 471 G4ThreeVector dX = (lvX.vect()).unit();
473 G4double eX = lvX.e(); // excited nucleon 472 G4double eX = lvX.e(); // excited nucleon
474 G4double mX = sqrt(massX2); 473 G4double mX = sqrt(massX2);
475 // G4double pX = sqrt( eX*eX - mX*mX ); 474 // G4double pX = sqrt( eX*eX - mX*mX );
476 // G4double sumE = eX + rM; 475 // G4double sumE = eX + rM;
477 476
478 if( qeTotRat > G4UniformRand() || mX <= fMt 477 if( qeTotRat > G4UniformRand() || mX <= fMt ) // || eX <= 1232.*MeV) // QE
479 { 478 {
480 fString = false; 479 fString = false;
481 480
482 if( fProton ) 481 if( fProton )
483 { 482 {
484 fPDGencoding = 2212; 483 fPDGencoding = 2212;
485 fMr = proton_mass_c2; 484 fMr = proton_mass_c2;
486 recoil = G4Nucleus(A-1,Z-1); 485 recoil = G4Nucleus(A-1,Z-1);
487 fRecoil = &recoil; 486 fRecoil = &recoil;
488 rM = recoil.AtomicMass(A-1,Z-1); 487 rM = recoil.AtomicMass(A-1,Z-1);
489 } 488 }
490 else // if( pName == "anti_nu_mu" ) 489 else // if( pName == "anti_nu_mu" )
491 { 490 {
492 fPDGencoding = 2112; 491 fPDGencoding = 2112;
493 fMr = G4ParticleTable::GetParticleTabl 492 fMr = G4ParticleTable::GetParticleTable()->
494 FindParticle(fPDGencoding)->GetPDGMass(); // 493 FindParticle(fPDGencoding)->GetPDGMass(); // 939.5654133*MeV;
495 recoil = G4Nucleus(A-1,Z); 494 recoil = G4Nucleus(A-1,Z);
496 fRecoil = &recoil; 495 fRecoil = &recoil;
497 rM = recoil.AtomicMass(A-1,Z); 496 rM = recoil.AtomicMass(A-1,Z);
498 } 497 }
499 // sumE = eX + rM; 498 // sumE = eX + rM;
500 G4double eTh = fMr + 0.5*(fMr*fMr - mX*mX) 499 G4double eTh = fMr + 0.5*(fMr*fMr - mX*mX)/rM;
501 500
502 if( eX <= eTh ) // vmg, very rarely out of 501 if( eX <= eTh ) // vmg, very rarely out of kinematics
503 { 502 {
504 fString = true; 503 fString = true;
505 theParticleChange.SetEnergyChange(energy 504 theParticleChange.SetEnergyChange(energy);
506 theParticleChange.SetMomentumChange(aTra 505 theParticleChange.SetMomentumChange(aTrack.Get4Momentum().vect().unit());
507 return &theParticleChange; 506 return &theParticleChange;
508 } 507 }
509 // FinalBarion( fLVh, 0, fPDGencoding ); / 508 // FinalBarion( fLVh, 0, fPDGencoding ); // p(n)+deexcited recoil
510 FinalBarion( lvX, 0, fPDGencoding ); // p( 509 FinalBarion( lvX, 0, fPDGencoding ); // p(n)+deexcited recoil
511 } 510 }
512 else // if ( eX < 9500000.*GeV ) // < 25.*G 511 else // if ( eX < 9500000.*GeV ) // < 25.*GeV) // < 95.*GeV ) // < 2.5*GeV ) //cluster decay
513 { 512 {
514 if ( fProton && pName == "nu_mu" ) 513 if ( fProton && pName == "nu_mu" ) qB = 2;
515 // else if( fProton && pName == "anti_nu_ 514 // else if( fProton && pName == "anti_nu_mu" ) qB = 0;
516 else if( !fProton && pName == "nu_mu" ) 515 else if( !fProton && pName == "nu_mu" ) qB = 1;
517 // else if( !fProton && pName == "anti_nu_ 516 // else if( !fProton && pName == "anti_nu_mu" ) qB = -1;
518 517
519 518
520 ClusterDecay( lvX, qB ); 519 ClusterDecay( lvX, qB );
521 } 520 }
522 return &theParticleChange; 521 return &theParticleChange;
523 } 522 }
524 523
525 524
526 ////////////////////////////////////////////// 525 /////////////////////////////////////////////////////////////////////
527 ////////////////////////////////////////////// 526 ////////////////////////////////////////////////////////////////////
528 ////////////////////////////////////////////// 527 ///////////////////////////////////////////////////////////////////
529 528
530 ////////////////////////////////////////////// 529 /////////////////////////////////////////////////
531 // 530 //
532 // sample x, then Q2 531 // sample x, then Q2
533 532
534 void G4NuMuNucleusCcModel::SampleLVkr(const G4 533 void G4NuMuNucleusCcModel::SampleLVkr(const G4HadProjectile & aTrack, G4Nucleus& targetNucleus)
535 { 534 {
536 fBreak = false; 535 fBreak = false;
537 G4int A = targetNucleus.GetA_asInt(), iTer(0 536 G4int A = targetNucleus.GetA_asInt(), iTer(0), iTerMax(100);
538 G4int Z = targetNucleus.GetZ_asInt(); 537 G4int Z = targetNucleus.GetZ_asInt();
539 G4double e3(0.), pMu2(0.), pX2(0.), nMom(0.) 538 G4double e3(0.), pMu2(0.), pX2(0.), nMom(0.), rM(0.), hM(0.), tM = targetNucleus.AtomicMass(A,Z);
540 G4double Ex(0.), ei(0.), nm2(0.); 539 G4double Ex(0.), ei(0.), nm2(0.);
541 G4double cost(1.), sint(0.), phi(0.), muMom( 540 G4double cost(1.), sint(0.), phi(0.), muMom(0.);
542 G4ThreeVector eP, bst; 541 G4ThreeVector eP, bst;
543 const G4HadProjectile* aParticle = &aTrack; 542 const G4HadProjectile* aParticle = &aTrack;
544 G4LorentzVector lvp1 = aParticle->Get4Moment 543 G4LorentzVector lvp1 = aParticle->Get4Momentum();
545 544
546 if( A == 1 ) // hydrogen, no Fermi motion ?? 545 if( A == 1 ) // hydrogen, no Fermi motion ???
547 { 546 {
548 fNuEnergy = aParticle->GetTotalEnergy(); 547 fNuEnergy = aParticle->GetTotalEnergy();
549 iTer = 0; 548 iTer = 0;
550 549
551 do 550 do
552 { 551 {
553 fXsample = SampleXkr(fNuEnergy); 552 fXsample = SampleXkr(fNuEnergy);
554 fQtransfer = SampleQkr(fNuEnergy, fXsamp 553 fQtransfer = SampleQkr(fNuEnergy, fXsample);
555 fQ2 = fQtransfer*fQtransfer; 554 fQ2 = fQtransfer*fQtransfer;
556 555
557 if( fXsample > 0. ) 556 if( fXsample > 0. )
558 { 557 {
559 fW2 = fM1*fM1 - fQ2 + fQ2/fXsample; // 558 fW2 = fM1*fM1 - fQ2 + fQ2/fXsample; // sample excited hadron mass
560 fEmu = fNuEnergy - fQ2/2./fM1/fXsample 559 fEmu = fNuEnergy - fQ2/2./fM1/fXsample;
561 } 560 }
562 else 561 else
563 { 562 {
564 fW2 = fM1*fM1; 563 fW2 = fM1*fM1;
565 fEmu = fNuEnergy; 564 fEmu = fNuEnergy;
566 } 565 }
567 e3 = fNuEnergy + fM1 - fEmu; 566 e3 = fNuEnergy + fM1 - fEmu;
568 567
569 if( e3 < sqrt(fW2) ) G4cout<<"energyX = 568 if( e3 < sqrt(fW2) ) G4cout<<"energyX = "<<e3/GeV<<", fW = "<<sqrt(fW2)/GeV<<G4endl;
570 569
571 pMu2 = fEmu*fEmu - fMu*fMu; 570 pMu2 = fEmu*fEmu - fMu*fMu;
572 571
573 if(pMu2 < 0.) { fBreak = true; return; } 572 if(pMu2 < 0.) { fBreak = true; return; }
574 573
575 pX2 = e3*e3 - fW2; 574 pX2 = e3*e3 - fW2;
576 575
577 fCosTheta = fNuEnergy*fNuEnergy + pMu2 576 fCosTheta = fNuEnergy*fNuEnergy + pMu2 - pX2;
578 fCosTheta /= 2.*fNuEnergy*sqrt(pMu2); 577 fCosTheta /= 2.*fNuEnergy*sqrt(pMu2);
579 iTer++; 578 iTer++;
580 } 579 }
581 while( ( abs(fCosTheta) > 1. || fEmu < fMu 580 while( ( abs(fCosTheta) > 1. || fEmu < fMu ) && iTer < iTerMax );
582 581
583 if( iTer >= iTerMax ) { fBreak = true; ret 582 if( iTer >= iTerMax ) { fBreak = true; return; }
584 583
585 if( abs(fCosTheta) > 1.) // vmg: due to bi 584 if( abs(fCosTheta) > 1.) // vmg: due to big Q2/x values. To be improved ...
586 { 585 {
587 G4cout<<"H2: fCosTheta = "<<fCosTheta<<" 586 G4cout<<"H2: fCosTheta = "<<fCosTheta<<", fEmu = "<<fEmu<<G4endl;
588 // fCosTheta = -1. + 2.*G4UniformRand(); 587 // fCosTheta = -1. + 2.*G4UniformRand();
589 if(fCosTheta < -1.) fCosTheta = -1.; 588 if(fCosTheta < -1.) fCosTheta = -1.;
590 if(fCosTheta > 1.) fCosTheta = 1.; 589 if(fCosTheta > 1.) fCosTheta = 1.;
591 } 590 }
592 // LVs 591 // LVs
593 592
594 G4LorentzVector lvt1 = G4LorentzVector( 0 593 G4LorentzVector lvt1 = G4LorentzVector( 0., 0., 0., fM1 );
595 G4LorentzVector lvsum = lvp1 + lvt1; 594 G4LorentzVector lvsum = lvp1 + lvt1;
596 595
597 cost = fCosTheta; 596 cost = fCosTheta;
598 sint = std::sqrt( (1.0 - cost)*(1.0 + cost 597 sint = std::sqrt( (1.0 - cost)*(1.0 + cost) );
599 phi = G4UniformRand()*CLHEP::twopi; 598 phi = G4UniformRand()*CLHEP::twopi;
600 eP = G4ThreeVector( sint*std::cos(phi), 599 eP = G4ThreeVector( sint*std::cos(phi), sint*std::sin(phi), cost );
601 muMom = sqrt(fEmu*fEmu-fMu*fMu); 600 muMom = sqrt(fEmu*fEmu-fMu*fMu);
602 eP *= muMom; 601 eP *= muMom;
603 fLVl = G4LorentzVector( eP, fEmu ); 602 fLVl = G4LorentzVector( eP, fEmu );
604 603
605 fLVh = lvsum - fLVl; 604 fLVh = lvsum - fLVl;
606 fLVt = G4LorentzVector( 0., 0., 0., 0. ); 605 fLVt = G4LorentzVector( 0., 0., 0., 0. ); // no recoil
607 } 606 }
608 else // Fermi motion, Q2 in nucleon rest fra 607 else // Fermi motion, Q2 in nucleon rest frame
609 { 608 {
610 G4Nucleus recoil1( A-1, Z ); 609 G4Nucleus recoil1( A-1, Z );
611 rM = recoil1.AtomicMass(A-1,Z); 610 rM = recoil1.AtomicMass(A-1,Z);
612 do 611 do
613 { 612 {
614 // nMom = NucleonMomentumBR( targetNucle 613 // nMom = NucleonMomentumBR( targetNucleus ); // BR
615 nMom = GgSampleNM( targetNucleus ); // G 614 nMom = GgSampleNM( targetNucleus ); // Gg
616 Ex = GetEx(A-1, fProton); 615 Ex = GetEx(A-1, fProton);
617 ei = tM - sqrt( (rM + Ex)*(rM + Ex) + nM 616 ei = tM - sqrt( (rM + Ex)*(rM + Ex) + nMom*nMom );
618 // ei = 0.5*( tM - s2M - 2*eX ); 617 // ei = 0.5*( tM - s2M - 2*eX );
619 618
620 nm2 = ei*ei - nMom*nMom; 619 nm2 = ei*ei - nMom*nMom;
621 iTer++; 620 iTer++;
622 } 621 }
623 while( nm2 < 0. && iTer < iTerMax ); 622 while( nm2 < 0. && iTer < iTerMax );
624 623
625 if( iTer >= iTerMax ) { fBreak = true; ret 624 if( iTer >= iTerMax ) { fBreak = true; return; }
626 625
627 G4ThreeVector nMomDir = nMom*G4RandomDirec 626 G4ThreeVector nMomDir = nMom*G4RandomDirection();
628 627
629 if( !f2p2h || A < 3 ) // 1p1h 628 if( !f2p2h || A < 3 ) // 1p1h
630 { 629 {
631 // hM = tM - rM; 630 // hM = tM - rM;
632 631
633 fLVt = G4LorentzVector( -nMomDir, sqrt( 632 fLVt = G4LorentzVector( -nMomDir, sqrt( (rM + Ex)*(rM + Ex) + nMom*nMom ) ); // rM ); //
634 fLVh = G4LorentzVector( nMomDir, ei ); 633 fLVh = G4LorentzVector( nMomDir, ei ); // hM); //
635 } 634 }
636 else // 2p2h 635 else // 2p2h
637 { 636 {
638 G4Nucleus recoil(A-2,Z-1); 637 G4Nucleus recoil(A-2,Z-1);
639 rM = recoil.AtomicMass(A-2,Z-1)+sqrt(nMo 638 rM = recoil.AtomicMass(A-2,Z-1)+sqrt(nMom*nMom+fM1*fM1);
640 hM = tM - rM; 639 hM = tM - rM;
641 640
642 fLVt = G4LorentzVector( nMomDir, sqrt( r 641 fLVt = G4LorentzVector( nMomDir, sqrt( rM*rM+nMom*nMom ) );
643 fLVh = G4LorentzVector(-nMomDir, sqrt( h 642 fLVh = G4LorentzVector(-nMomDir, sqrt( hM*hM+nMom*nMom ) );
644 } 643 }
645 // G4cout<<hM<<", "; 644 // G4cout<<hM<<", ";
646 // bst = fLVh.boostVector(); 645 // bst = fLVh.boostVector();
647 646
648 // lvp1.boost(-bst); // -> nucleon rest sy 647 // lvp1.boost(-bst); // -> nucleon rest system, where Q2 transfer is ???
649 648
650 fNuEnergy = lvp1.e(); 649 fNuEnergy = lvp1.e();
651 // G4double mN = fLVh.m(); // better mN = 650 // G4double mN = fLVh.m(); // better mN = fM1 !? vmg
652 iTer = 0; 651 iTer = 0;
653 652
654 do // no FM!?, 5.4.20 vmg 653 do // no FM!?, 5.4.20 vmg
655 { 654 {
656 fXsample = SampleXkr(fNuEnergy); 655 fXsample = SampleXkr(fNuEnergy);
657 fQtransfer = SampleQkr(fNuEnergy, fXsamp 656 fQtransfer = SampleQkr(fNuEnergy, fXsample);
658 fQ2 = fQtransfer*fQtransfer; 657 fQ2 = fQtransfer*fQtransfer;
659 658
660 // G4double mR = mN + fM1*(A-1.)*std::ex 659 // G4double mR = mN + fM1*(A-1.)*std::exp(-2.0*fQtransfer/mN); // recoil mass in+el
661 660
662 if( fXsample > 0. ) 661 if( fXsample > 0. )
663 { 662 {
664 fW2 = fM1*fM1 - fQ2 + fQ2/fXsample; // 663 fW2 = fM1*fM1 - fQ2 + fQ2/fXsample; // sample excited hadron mass
665 664
666 // fW2 = mN*mN - fQ2 + fQ2/fXsample; / 665 // fW2 = mN*mN - fQ2 + fQ2/fXsample; // sample excited hadron mass
667 // fEmu = fNuEnergy - fQ2/2./mR/fXsamp 666 // fEmu = fNuEnergy - fQ2/2./mR/fXsample; // fM1->mN
668 667
669 fEmu = fNuEnergy - fQ2/2./fM1/fXsample 668 fEmu = fNuEnergy - fQ2/2./fM1/fXsample; // fM1->mN
670 } 669 }
671 else 670 else
672 { 671 {
673 // fW2 = mN*mN; 672 // fW2 = mN*mN;
674 673
675 fW2 = fM1*fM1; 674 fW2 = fM1*fM1;
676 fEmu = fNuEnergy; 675 fEmu = fNuEnergy;
677 } 676 }
678 // if(fEmu < 0.) G4cout<<"fEmu = "<<fEmu 677 // if(fEmu < 0.) G4cout<<"fEmu = "<<fEmu<<" hM = "<<hM<<G4endl;
679 // e3 = fNuEnergy + mR - fEmu; 678 // e3 = fNuEnergy + mR - fEmu;
680 679
681 e3 = fNuEnergy + fM1 - fEmu; 680 e3 = fNuEnergy + fM1 - fEmu;
682 681
683 // if( e3 < sqrt(fW2) ) G4cout<<"energy 682 // if( e3 < sqrt(fW2) ) G4cout<<"energyX = "<<e3/GeV<<", fW = "<<sqrt(fW2)/GeV<<G4endl;
684 683
685 pMu2 = fEmu*fEmu - fMu*fMu; 684 pMu2 = fEmu*fEmu - fMu*fMu;
686 pX2 = e3*e3 - fW2; 685 pX2 = e3*e3 - fW2;
687 686
688 if(pMu2 < 0.) { fBreak = true; return; } 687 if(pMu2 < 0.) { fBreak = true; return; }
689 688
690 fCosTheta = fNuEnergy*fNuEnergy + pMu2 689 fCosTheta = fNuEnergy*fNuEnergy + pMu2 - pX2;
691 fCosTheta /= 2.*fNuEnergy*sqrt(pMu2); 690 fCosTheta /= 2.*fNuEnergy*sqrt(pMu2);
692 iTer++; 691 iTer++;
693 } 692 }
694 while( ( abs(fCosTheta) > 1. || fEmu < fMu 693 while( ( abs(fCosTheta) > 1. || fEmu < fMu ) && iTer < iTerMax );
695 694
696 if( iTer >= iTerMax ) { fBreak = true; ret 695 if( iTer >= iTerMax ) { fBreak = true; return; }
697 696
698 if( abs(fCosTheta) > 1.) // vmg: due to bi 697 if( abs(fCosTheta) > 1.) // vmg: due to big Q2/x values. To be improved ...
699 { 698 {
700 G4cout<<"FM: fCosTheta = "<<fCosTheta<<" 699 G4cout<<"FM: fCosTheta = "<<fCosTheta<<", fEmu = "<<fEmu<<G4endl;
701 // fCosTheta = -1. + 2.*G4UniformRand(); 700 // fCosTheta = -1. + 2.*G4UniformRand();
702 if( fCosTheta < -1.) fCosTheta = -1.; 701 if( fCosTheta < -1.) fCosTheta = -1.;
703 if( fCosTheta > 1.) fCosTheta = 1.; 702 if( fCosTheta > 1.) fCosTheta = 1.;
704 } 703 }
705 // LVs 704 // LVs
706 // G4LorentzVector lvt1 = G4LorentzVector 705 // G4LorentzVector lvt1 = G4LorentzVector( 0., 0., 0., mN ); // fM1 );
707 706
708 G4LorentzVector lvt1 = G4LorentzVector( 0 707 G4LorentzVector lvt1 = G4LorentzVector( 0., 0., 0., fM1 ); // fM1 );
709 G4LorentzVector lvsum = lvp1 + lvt1; 708 G4LorentzVector lvsum = lvp1 + lvt1;
710 709
711 cost = fCosTheta; 710 cost = fCosTheta;
712 sint = std::sqrt( (1.0 - cost)*(1.0 + cost 711 sint = std::sqrt( (1.0 - cost)*(1.0 + cost) );
713 phi = G4UniformRand()*CLHEP::twopi; 712 phi = G4UniformRand()*CLHEP::twopi;
714 eP = G4ThreeVector( sint*std::cos(phi), 713 eP = G4ThreeVector( sint*std::cos(phi), sint*std::sin(phi), cost );
715 muMom = sqrt(fEmu*fEmu-fMu*fMu); 714 muMom = sqrt(fEmu*fEmu-fMu*fMu);
716 eP *= muMom; 715 eP *= muMom;
717 fLVl = G4LorentzVector( eP, fEmu ); 716 fLVl = G4LorentzVector( eP, fEmu );
718 fLVh = lvsum - fLVl; 717 fLVh = lvsum - fLVl;
719 718
720 // if( fLVh.e() < mN || fLVh.m2() < 0.) { 719 // if( fLVh.e() < mN || fLVh.m2() < 0.) { fBreak = true; return; }
721 720
722 if( fLVh.e() < fM1 || fLVh.m2() < 0.) { fB 721 if( fLVh.e() < fM1 || fLVh.m2() < 0.) { fBreak = true; return; }
723 722
724 // back to lab system 723 // back to lab system
725 724
726 // fLVl.boost(bst); 725 // fLVl.boost(bst);
727 // fLVh.boost(bst); 726 // fLVh.boost(bst);
728 } 727 }
729 //G4cout<<iTer<<", "<<fBreak<<"; "; 728 //G4cout<<iTer<<", "<<fBreak<<"; ";
730 } 729 }
731 730
732 // 731 //
733 // 732 //
734 /////////////////////////// 733 ///////////////////////////
735 734