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25 // 25 //
26 // 26 //
27 // 27 //
28 // ------------------------------------------- 28 // -----------------------------------------------------------------------------
29 // GEANT 4 class implementation file 29 // GEANT 4 class implementation file
30 // 30 //
31 // History: first implementation, Maxim K 31 // History: first implementation, Maxim Komogorov, 10-Jul-1998
32 // ------------------------------------------- 32 // -----------------------------------------------------------------------------
33 #include "G4LundStringFragmentation.hh" 33 #include "G4LundStringFragmentation.hh"
34 #include "G4PhysicalConstants.hh" 34 #include "G4PhysicalConstants.hh"
35 #include "G4SystemOfUnits.hh" 35 #include "G4SystemOfUnits.hh"
36 #include "Randomize.hh" 36 #include "Randomize.hh"
37 #include "G4FragmentingString.hh" 37 #include "G4FragmentingString.hh"
38 #include "G4DiQuarks.hh" 38 #include "G4DiQuarks.hh"
39 #include "G4Quarks.hh" 39 #include "G4Quarks.hh"
40 #include "G4HadronicParameters.hh" 40 #include "G4HadronicParameters.hh"
41 #include "G4Exp.hh" 41 #include "G4Exp.hh"
42 #include "G4Pow.hh" 42 #include "G4Pow.hh"
43 43
44 //#define debug_LUNDfragmentation 44 //#define debug_LUNDfragmentation
45 45
46 // Class G4LundStringFragmentation 46 // Class G4LundStringFragmentation
47 //******************************************** 47 //*************************************************************************************
48 48
49 G4LundStringFragmentation::G4LundStringFragmen 49 G4LundStringFragmentation::G4LundStringFragmentation()
50 : G4VLongitudinalStringDecay("LundStringFrag 50 : G4VLongitudinalStringDecay("LundStringFragmentation")
51 { 51 {
52 SetMassCut(210.*MeV); // Mpi + Delta 52 SetMassCut(210.*MeV); // Mpi + Delta
53 // For ProduceOneH 53 // For ProduceOneHadron it is required
54 // that no one pi- 54 // that no one pi-meson can be produced.
55 SigmaQT = 0.435 * GeV; 55 SigmaQT = 0.435 * GeV;
56 Tmt = 190.0 * MeV; 56 Tmt = 190.0 * MeV;
57 57
58 SetStringTensionParameter(1.*GeV/fermi); 58 SetStringTensionParameter(1.*GeV/fermi);
59 SetDiquarkBreakProbability(0.3); 59 SetDiquarkBreakProbability(0.3);
60 60
61 SetStrangenessSuppression((1.0 - 0.12)/2.0 61 SetStrangenessSuppression((1.0 - 0.12)/2.0);
62 SetDiquarkSuppression(0.07); 62 SetDiquarkSuppression(0.07);
63 63
64 // Check if charmed and bottom hadrons are 64 // Check if charmed and bottom hadrons are enabled: if this is the case, then
65 // set the non-zero probabilities for c-cb 65 // set the non-zero probabilities for c-cbar and b-bbar creation from the vacuum,
66 // else set them to 0.0. If these probabil 66 // else set them to 0.0. If these probabilities are/aren't zero then charmed or bottom
67 // hadrons can't/can be created during the 67 // hadrons can't/can be created during the string fragmentation of ordinary
68 // (i.e. not heavy) projectile hadron nucl 68 // (i.e. not heavy) projectile hadron nuclear reactions.
69 if ( G4HadronicParameters::Instance()->Ena 69 if ( G4HadronicParameters::Instance()->EnableBCParticles() ) {
70 SetProbCCbar(0.0002); // According to O 70 SetProbCCbar(0.0002); // According to O.I. Piskunova Yad. Fiz. 56 (1993) 1094; tuned by Uzhi Oct. 2022
71 SetProbBBbar(5.0e-5); // According to O 71 SetProbBBbar(5.0e-5); // According to O.I. Piskunova Yad. Fiz. 56 (1993) 1094
72 } else { 72 } else {
73 SetProbCCbar(0.0); 73 SetProbCCbar(0.0);
74 SetProbBBbar(0.0); 74 SetProbBBbar(0.0);
75 } 75 }
76 76
77 SetMinMasses(); // For treating of small 77 SetMinMasses(); // For treating of small string decays
78 } 78 }
79 79
80 //-------------------------------------------- 80 //--------------------------------------------------------------------------------------
81 81
82 G4KineticTrackVector* G4LundStringFragmentatio 82 G4KineticTrackVector* G4LundStringFragmentation::FragmentString(const G4ExcitedString& theString)
83 { 83 {
84 // Can no longer modify Parameters for Fragm 84 // Can no longer modify Parameters for Fragmentation.
85 85
86 PastInitPhase=true; 86 PastInitPhase=true;
87 87
88 G4FragmentingString aString(theString); 88 G4FragmentingString aString(theString);
89 SetMinimalStringMass(&aString); 89 SetMinimalStringMass(&aString);
90 90
91 #ifdef debug_LUNDfragmentation 91 #ifdef debug_LUNDfragmentation
92 G4cout<<G4endl<<"LUND StringFragmentat 92 G4cout<<G4endl<<"LUND StringFragmentation ------------------------------------"<<G4endl;
93 G4cout<<G4endl<<"LUND StringFragm: Str 93 G4cout<<G4endl<<"LUND StringFragm: String Mass "
94 <<theString.Get4Momentum 94 <<theString.Get4Momentum().mag()<<G4endl
95 <<"4Mom "<<theString.Get 95 <<"4Mom "<<theString.Get4Momentum()<<G4endl
96 <<"--------------------- 96 <<"------------------------------------"<<G4endl;
97 G4cout<<"String ends Direct "<<theStri 97 G4cout<<"String ends Direct "<<theString.GetLeftParton()->GetPDGcode()<<" "
98 <<theStri 98 <<theString.GetRightParton()->GetPDGcode()<<" "
99 <<theStri 99 <<theString.GetDirection()<< G4endl;
100 G4cout<<"Left mom "<<theString.GetLef 100 G4cout<<"Left mom "<<theString.GetLeftParton()->Get4Momentum()<<G4endl;
101 G4cout<<"Right mom "<<theString.GetRig 101 G4cout<<"Right mom "<<theString.GetRightParton()->Get4Momentum()<<G4endl<<G4endl;
102 G4cout<<"Check for Fragmentation "<<G4 102 G4cout<<"Check for Fragmentation "<<G4endl;
103 #endif 103 #endif
104 104
105 G4KineticTrackVector * LeftVector(0); 105 G4KineticTrackVector * LeftVector(0);
106 106
107 if (!aString.IsAFourQuarkString() && !IsItFr 107 if (!aString.IsAFourQuarkString() && !IsItFragmentable(&aString))
108 { 108 {
109 #ifdef debug_LUNDfragmentation 109 #ifdef debug_LUNDfragmentation
110 G4cout<<"Non fragmentable - th 110 G4cout<<"Non fragmentable - the string is converted to one hadron "<<G4endl;
111 #endif 111 #endif
112 // SetMassCut(210.*MeV); // F 112 // SetMassCut(210.*MeV); // For ProduceOneHadron it is required
113 // t 113 // that no one pi-meson can be produced.
114 114
115 G4double Mcut = GetMassCut(); 115 G4double Mcut = GetMassCut();
116 SetMassCut(10000.*MeV); 116 SetMassCut(10000.*MeV);
117 LeftVector=ProduceOneHadron(&theString); 117 LeftVector=ProduceOneHadron(&theString);
118 SetMassCut(Mcut); 118 SetMassCut(Mcut);
119 119
120 if ( LeftVector ) 120 if ( LeftVector )
121 { 121 {
122 if ( LeftVector->size() > 0) 122 if ( LeftVector->size() > 0)
123 { 123 {
124 LeftVector->operator[](0)->SetForm 124 LeftVector->operator[](0)->SetFormationTime(theString.GetTimeOfCreation());
125 LeftVector->operator[](0)->SetPosi 125 LeftVector->operator[](0)->SetPosition(theString.GetPosition());
126 } 126 }
127 if (LeftVector->size() > 1) 127 if (LeftVector->size() > 1)
128 { 128 {
129 // 2 hadrons created from qq-qqbar 129 // 2 hadrons created from qq-qqbar are stored
130 LeftVector->operator[](1)->SetFormationT 130 LeftVector->operator[](1)->SetFormationTime(theString.GetTimeOfCreation());
131 LeftVector->operator[](1)->SetPosition(t 131 LeftVector->operator[](1)->SetPosition(theString.GetPosition());
132 } 132 }
133 } 133 }
134 return LeftVector; 134 return LeftVector;
135 } 135 }
136 136
137 #ifdef debug_LUNDfragmentation 137 #ifdef debug_LUNDfragmentation
138 G4cout<<"The string will be fragmented 138 G4cout<<"The string will be fragmented. "<<G4endl;
139 #endif 139 #endif
140 140
141 // The string can fragment. At least two par 141 // The string can fragment. At least two particles can be produced.
142 LeftVector =new G4KineticTrackVec 142 LeftVector =new G4KineticTrackVector;
143 G4KineticTrackVector * RightVector=new G4Kin 143 G4KineticTrackVector * RightVector=new G4KineticTrackVector;
144 144
145 G4bool success = Loop_toFragmentString 145 G4bool success = Loop_toFragmentString(theString, LeftVector, RightVector);
146 146
147 if ( ! success ) 147 if ( ! success )
148 { 148 {
149 std::for_each(LeftVector->begin(), LeftVec 149 std::for_each(LeftVector->begin(), LeftVector->end(), DeleteKineticTrack());
150 LeftVector->clear(); 150 LeftVector->clear();
151 std::for_each(RightVector->begin(), RightV 151 std::for_each(RightVector->begin(), RightVector->end(), DeleteKineticTrack());
152 delete RightVector; 152 delete RightVector;
153 return LeftVector; 153 return LeftVector;
154 } 154 }
155 155
156 // Join Left- and RightVector into LeftVecto 156 // Join Left- and RightVector into LeftVector in correct order.
157 while (!RightVector->empty()) 157 while (!RightVector->empty())
158 { 158 {
159 LeftVector->push_back(RightVector->back()) 159 LeftVector->push_back(RightVector->back());
160 RightVector->erase(RightVector->end()-1); 160 RightVector->erase(RightVector->end()-1);
161 } 161 }
162 delete RightVector; 162 delete RightVector;
163 163
164 return LeftVector; 164 return LeftVector;
165 } 165 }
166 166
167 //-------------------------------------------- 167 //----------------------------------------------------------------------------------
168 168
169 G4bool G4LundStringFragmentation::IsItFragment 169 G4bool G4LundStringFragmentation::IsItFragmentable(const G4FragmentingString * const string)
170 { 170 {
171 SetMinimalStringMass(string); 171 SetMinimalStringMass(string);
172 //G4cout<<"MinM StrM "<<MinimalStringM 172 //G4cout<<"MinM StrM "<<MinimalStringMass<<" "<< string->Get4Momentum().mag()<<G4endl;
173 173
174 return std::abs(MinimalStringMass) < string- 174 return std::abs(MinimalStringMass) < string->Get4Momentum().mag();
175 175
176 //MinimalStringMass is negative and la 176 //MinimalStringMass is negative and large for a string with unknown particles in a final 2-particle decay.
177 } 177 }
178 178
179 //-------------------------------------------- 179 //----------------------------------------------------------------------------------------
180 180
181 G4bool G4LundStringFragmentation::Loop_toFragm 181 G4bool G4LundStringFragmentation::Loop_toFragmentString( const G4ExcitedString &theString,
182 182 G4KineticTrackVector * & LeftVector,
183 183 G4KineticTrackVector * & RightVector )
184 { 184 {
185 #ifdef debug_LUNDfragmentation 185 #ifdef debug_LUNDfragmentation
186 G4cout<<"Loop_toFrag "<<theString.GetL 186 G4cout<<"Loop_toFrag "<<theString.GetLeftParton()->GetPDGcode()<<" "
187 <<theString.GetL 187 <<theString.GetLeftParton()->Get4Momentum()<<G4endl
188 <<" "<<theString.GetR 188 <<" "<<theString.GetRightParton()->GetPDGcode()<<" "
189 <<theString.GetR 189 <<theString.GetRightParton()->Get4Momentum()<<G4endl
190 <<"Direction "<<theString.GetD 190 <<"Direction "<<theString.GetDirection()<< G4endl;
191 #endif 191 #endif
192 192
193 G4LorentzRotation toCmsI, toObserverFr 193 G4LorentzRotation toCmsI, toObserverFrameI;
194 194
195 G4bool final_success=false; 195 G4bool final_success=false;
196 G4bool inner_success=true; 196 G4bool inner_success=true;
197 197
198 G4int attempt=0; 198 G4int attempt=0;
199 199
200 while ( ! final_success && attempt++ < Strin 200 while ( ! final_success && attempt++ < StringLoopInterrupt )
201 { // If the string fragmentation does 201 { // If the string fragmentation does not be happend,
202 // repeat the fragmentation. 202 // repeat the fragmentation.
203 203
204 G4FragmentingString *currentSt 204 G4FragmentingString *currentString = new G4FragmentingString(theString);
205 toCmsI = currentString->Transf 205 toCmsI = currentString->TransformToAlignedCms();
206 toObserverFrameI = toCmsI.inve 206 toObserverFrameI = toCmsI.inverse();
207 207
208 G4LorentzRotation toCms, toObserverFrame; 208 G4LorentzRotation toCms, toObserverFrame;
209 209
210 //G4cout<<"Main loop start whilecounter "< 210 //G4cout<<"Main loop start whilecounter "<<attempt<<G4endl;
211 211
212 // Cleaning up the previously produced had 212 // Cleaning up the previously produced hadrons
213 std::for_each(LeftVector->begin(), LeftVec 213 std::for_each(LeftVector->begin(), LeftVector->end(), DeleteKineticTrack());
214 LeftVector->clear(); 214 LeftVector->clear();
215 std::for_each(RightVector->begin(), RightV 215 std::for_each(RightVector->begin(), RightVector->end(), DeleteKineticTrack());
216 RightVector->clear(); 216 RightVector->clear();
217 217
218 // Main fragmentation loop until the strin 218 // Main fragmentation loop until the string will not be able to fragment
219 inner_success=true; // set false on failu 219 inner_success=true; // set false on failure.
220 const G4int maxNumberOfLoops = 220 const G4int maxNumberOfLoops = 1000;
221 G4int loopCounter = -1; 221 G4int loopCounter = -1;
222 222
223 while ( (! StopFragmenting(currentString)) 223 while ( (! StopFragmenting(currentString)) && ++loopCounter < maxNumberOfLoops )
224 { // Split current string into hadro 224 { // Split current string into hadron + new string
225 #ifdef debug_LUNDfragm 225 #ifdef debug_LUNDfragmentation
226 G4cout<<"The string wi 226 G4cout<<"The string will fragment. "<<G4endl;;
227 //G4cout<<"1 "<<curren 227 //G4cout<<"1 "<<currentString->GetDecayDirection()<<G4endl;
228 #endif 228 #endif
229 G4FragmentingString *newString=0; // us 229 G4FragmentingString *newString=0; // used as output from SplitUp.
230 230
231 toCms=currentString->TransformToAlignedC 231 toCms=currentString->TransformToAlignedCms();
232 toObserverFrame= toCms 232 toObserverFrame= toCms.inverse();
233 233
234 #ifdef debug_LUNDfragm 234 #ifdef debug_LUNDfragmentation
235 //G4cout<<"CMS Left m 235 //G4cout<<"CMS Left mom "<<currentString->GetPleft()<<G4endl;
236 //G4cout<<"CMS Right m 236 //G4cout<<"CMS Right mom "<<currentString->GetPright()<<G4endl;
237 //G4cout<<"CMS String 237 //G4cout<<"CMS String M "<<currentString->GetPstring()<<G4endl;
238 #endif 238 #endif
239 239
240 G4KineticTrack * Hadron=Splitup(currentS 240 G4KineticTrack * Hadron=Splitup(currentString,newString);
241 241
242 if ( Hadron != 0 ) // Store the hadron 242 if ( Hadron != 0 ) // Store the hadron
243 { 243 {
244 #ifdef debug_L 244 #ifdef debug_LUNDfragmentation
245 G4cout<<"Hadro 245 G4cout<<"Hadron prod at fragm. "<<Hadron->GetDefinition()->GetParticleName()<<G4endl;
246 //G4cout<<"2 " 246 //G4cout<<"2 "<<currentString->GetDecayDirection()<<G4endl;
247 #endif 247 #endif
248 248
249 Hadron->Set4Momentum(toObserverFrame*H 249 Hadron->Set4Momentum(toObserverFrame*Hadron->Get4Momentum());
250 250
251 G4double TimeOftheStringCreation=theSt 251 G4double TimeOftheStringCreation=theString.GetTimeOfCreation();
252 G4ThreeVector PositionOftheStringCreat 252 G4ThreeVector PositionOftheStringCreation(theString.GetPosition());
253 253
254 G4LorentzVector Coordinate(Hadron->Get 254 G4LorentzVector Coordinate(Hadron->GetPosition(), Hadron->GetFormationTime());
255 G4LorentzVector Momentum = toObserverF 255 G4LorentzVector Momentum = toObserverFrame*Coordinate;
256 Hadron->SetFormationTime(TimeOftheStri 256 Hadron->SetFormationTime(TimeOftheStringCreation + Momentum.e() - fermi/c_light);
257 G4ThreeVector aPosition(Momentum.vect( 257 G4ThreeVector aPosition(Momentum.vect());
258 Hadron->SetPosition(PositionOftheStrin 258 Hadron->SetPosition(PositionOftheStringCreation+aPosition);
259 259
260 // Open to pro 260 // Open to protect hadron production at fragmentation
261 if ( currentString->GetDecayDirection( 261 if ( currentString->GetDecayDirection() > 0 )
262 { 262 {
263 LeftVector->push_back(Hadron); 263 LeftVector->push_back(Hadron);
264 } else 264 } else
265 { 265 {
266 RightVector->push_back(Hadron); 266 RightVector->push_back(Hadron);
267 } 267 }
268 delete currentString; 268 delete currentString;
269 currentString=newString; 269 currentString=newString;
270 } else { 270 } else {
271 if ( newString ) del 271 if ( newString ) delete newString;
272 } 272 }
273 273
274 currentString->Lorentz 274 currentString->LorentzRotate(toObserverFrame);
275 }; 275 };
276 276
277 if ( loopCounter >= maxNumberO 277 if ( loopCounter >= maxNumberOfLoops ) {
278 inner_success=false; 278 inner_success=false;
279 } 279 }
280 280
281 // Split remaining string into 2 final had 281 // Split remaining string into 2 final hadrons.
282 #ifdef debug_LUNDfragmentation 282 #ifdef debug_LUNDfragmentation
283 if (inner_success) G4cout<<"Sp 283 if (inner_success) G4cout<<"Split remaining string into 2 final hadrons."<<G4endl;
284 #endif 284 #endif
285 285
286 if ( inner_success && SplitLast(currentStr 286 if ( inner_success && SplitLast(currentString, LeftVector, RightVector) ) // Close to protect Last Str. Decay
287 { 287 {
288 final_success = true; 288 final_success = true;
289 } 289 }
290 290
291 delete currentString; 291 delete currentString;
292 } // End of the loop where we try to fragme 292 } // End of the loop where we try to fragment the string.
293 293
294 G4int sign = +1; 294 G4int sign = +1;
295 if ( theString.GetDirection() < 0 ) si 295 if ( theString.GetDirection() < 0 ) sign = -1;
296 for ( unsigned int hadronI = 0; hadron 296 for ( unsigned int hadronI = 0; hadronI < LeftVector->size(); ++hadronI ) {
297 G4LorentzVector Tmp = LeftVector->o 297 G4LorentzVector Tmp = LeftVector->operator[](hadronI)->Get4Momentum();
298 Tmp.setZ(sign*Tmp.getZ()); 298 Tmp.setZ(sign*Tmp.getZ());
299 Tmp *= toObserverFrameI; 299 Tmp *= toObserverFrameI;
300 LeftVector->operator[](hadronI)->Se 300 LeftVector->operator[](hadronI)->Set4Momentum(Tmp);
301 } 301 }
302 for ( unsigned int hadronI = 0; hadron 302 for ( unsigned int hadronI = 0; hadronI < RightVector->size(); ++hadronI ) {
303 G4LorentzVector Tmp = RightVector-> 303 G4LorentzVector Tmp = RightVector->operator[](hadronI)->Get4Momentum();
304 Tmp.setZ(sign*Tmp.getZ()); 304 Tmp.setZ(sign*Tmp.getZ());
305 Tmp *= toObserverFrameI; 305 Tmp *= toObserverFrameI;
306 RightVector->operator[](hadronI)->S 306 RightVector->operator[](hadronI)->Set4Momentum(Tmp);
307 } 307 }
308 308
309 return final_success; 309 return final_success;
310 } 310 }
311 311
312 //-------------------------------------------- 312 //----------------------------------------------------------------------------------------
313 313
314 G4bool G4LundStringFragmentation::StopFragment 314 G4bool G4LundStringFragmentation::StopFragmenting(const G4FragmentingString * const string)
315 { 315 {
316 SetMinimalStringMass(string); 316 SetMinimalStringMass(string);
317 317
318 if ( MinimalStringMass < 0.) return true; 318 if ( MinimalStringMass < 0.) return true;
319 319
320 if (string->IsAFourQuarkString()) 320 if (string->IsAFourQuarkString())
321 { 321 {
322 return G4UniformRand() < G4Exp(-0.0005*(st 322 return G4UniformRand() < G4Exp(-0.0005*(string->Mass() - MinimalStringMass));
323 } else { 323 } else {
324 324
325 if (MinimalStringMass < 0.0 ) 325 if (MinimalStringMass < 0.0 ) return false; // For a string with di-quark having c or b quarks and s, c, b quarks
326 326
327 G4bool Result = G4UniformRand() < 327 G4bool Result = G4UniformRand() <
328 G4Exp(-0.66e-6*(string->Mass()*string- 328 G4Exp(-0.66e-6*(string->Mass()*string->Mass() - MinimalStringMass*MinimalStringMass));
329 // G4bool Result = string->Mas 329 // G4bool Result = string->Mass() < MinimalStringMass + 150.*MeV*G4UniformRand(); // a'la LUND
330 330
331 #ifdef debug_LUNDfragmentation 331 #ifdef debug_LUNDfragmentation
332 G4cout<<"StopFragmenting Minim 332 G4cout<<"StopFragmenting MinimalStringMass string->Mass() "<<MinimalStringMass
333 <<" "<<string->Mass()<<G 333 <<" "<<string->Mass()<<G4endl;
334 G4cout<<"StopFragmenting - Yes 334 G4cout<<"StopFragmenting - Yes/No "<<Result<<G4endl;
335 #endif 335 #endif
336 return Result; 336 return Result;
337 } 337 }
338 } 338 }
339 339
340 //-------------------------------------------- 340 //-----------------------------------------------------------------------------
341 341
342 G4KineticTrack * G4LundStringFragmentation::Sp 342 G4KineticTrack * G4LundStringFragmentation::Splitup(G4FragmentingString *string,
343 G4Fragmentin 343 G4FragmentingString *&newString)
344 { 344 {
345 #ifdef debug_LUNDfragmentation 345 #ifdef debug_LUNDfragmentation
346 G4cout<<G4endl; 346 G4cout<<G4endl;
347 G4cout<<"Start SplitUP ================ 347 G4cout<<"Start SplitUP ========================="<<G4endl;
348 G4cout<<"String partons: " <<string->Ge 348 G4cout<<"String partons: " <<string->GetLeftParton()->GetPDGEncoding()<<" "
349 <<string->Ge 349 <<string->GetRightParton()->GetPDGEncoding()<<" "
350 <<"Direction " <<string->Ge 350 <<"Direction " <<string->GetDecayDirection()<<G4endl;
351 #endif 351 #endif
352 352
353 //... random choice of string end to us 353 //... random choice of string end to use for creating the hadron (decay)
354 G4int SideOfDecay = (G4UniformRand() < 354 G4int SideOfDecay = (G4UniformRand() < 0.5)? 1: -1;
355 if (SideOfDecay < 0) 355 if (SideOfDecay < 0)
356 { 356 {
357 string->SetLeftPartonStable(); 357 string->SetLeftPartonStable();
358 } else 358 } else
359 { 359 {
360 string->SetRightPartonStable(); 360 string->SetRightPartonStable();
361 } 361 }
362 362
363 G4ParticleDefinition *newStringEnd; 363 G4ParticleDefinition *newStringEnd;
364 G4ParticleDefinition * HadronDefinition 364 G4ParticleDefinition * HadronDefinition;
365 365
366 G4double StringMass=string->Mass(); 366 G4double StringMass=string->Mass();
367 367
368 G4double ProbDqADq = GetDiquarkSuppress 368 G4double ProbDqADq = GetDiquarkSuppress();
369 G4double ProbSaS = 1.0 - 2.0 * GetStr 369 G4double ProbSaS = 1.0 - 2.0 * GetStrangeSuppress();
370 370
371 #ifdef debug_LUNDfragmentation 371 #ifdef debug_LUNDfragmentation
372 G4cout<<"StrMass DiquarkSuppression 372 G4cout<<"StrMass DiquarkSuppression "<<StringMass<<" "<<GetDiquarkSuppress()<<G4endl;
373 #endif 373 #endif
374 374
375 G4int NumberOfpossibleBaryons = 2; 375 G4int NumberOfpossibleBaryons = 2;
376 376
377 if (string->GetLeftParton()->GetParticl 377 if (string->GetLeftParton()->GetParticleSubType() != "quark") NumberOfpossibleBaryons++;
378 if (string->GetRightParton()->GetPartic 378 if (string->GetRightParton()->GetParticleSubType() != "quark") NumberOfpossibleBaryons++;
379 379
380 G4double ActualProb = ProbDqADq ; 380 G4double ActualProb = ProbDqADq ;
381 ActualProb *= (1.0-G4Pow::GetInstance() 381 ActualProb *= (1.0-G4Pow::GetInstance()->powA(NumberOfpossibleBaryons*1400.0/StringMass, 8.0));
382 if(ActualProb <0.0) ActualProb = 0.; 382 if(ActualProb <0.0) ActualProb = 0.;
383 383
384 SetDiquarkSuppression(ActualProb); 384 SetDiquarkSuppression(ActualProb);
385 385
386 G4double Mth = 1250.0; 386 G4double Mth = 1250.0; // 2 Mk + Mpi
387 if ( NumberOfpossibleBaryons == 3 ){Mth 387 if ( NumberOfpossibleBaryons == 3 ){Mth = 2520.0;} // Mlambda/Msigma + Mk + Mpi
388 else if ( NumberOfpossibleBaryons == 4 388 else if ( NumberOfpossibleBaryons == 4 ){Mth = 2380.0;} // 2 Mlambda/Msigma + Mk + Mpi
389 else {} 389 else {}
390 390
391 ActualProb = ProbSaS; 391 ActualProb = ProbSaS;
392 ActualProb *= (1.0 - G4Pow::GetInstance 392 ActualProb *= (1.0 - G4Pow::GetInstance()->powA( Mth/StringMass, 2.5 ));
393 if ( ActualProb < 0.0 ) ActualProb = 0. 393 if ( ActualProb < 0.0 ) ActualProb = 0.0;
394 SetStrangenessSuppression((1.0-ActualPr 394 SetStrangenessSuppression((1.0-ActualProb)/2.0);
395 395
396 #ifdef debug_LUNDfragmentation 396 #ifdef debug_LUNDfragmentation
397 G4cout<<"StrMass DiquarkSuppression cor 397 G4cout<<"StrMass DiquarkSuppression corrected "<<StringMass<<" "<<GetDiquarkSuppress()<<G4endl;
398 #endif 398 #endif
399 399
400 if (string->DecayIsQuark()) 400 if (string->DecayIsQuark())
401 { 401 {
402 HadronDefinition= QuarkSplitup(strin 402 HadronDefinition= QuarkSplitup(string->GetDecayParton(), newStringEnd);
403 } else { 403 } else {
404 HadronDefinition= DiQuarkSplitup(str 404 HadronDefinition= DiQuarkSplitup(string->GetDecayParton(), newStringEnd);
405 } 405 }
406 406
407 SetDiquarkSuppression(ProbDqADq); 407 SetDiquarkSuppression(ProbDqADq);
408 SetStrangenessSuppression((1.0-ProbSaS) 408 SetStrangenessSuppression((1.0-ProbSaS)/2.0);
409 409
410 if ( HadronDefinition == NULL ) { G4Kin 410 if ( HadronDefinition == NULL ) { G4KineticTrack * Hadron =0; return Hadron; }
411 411
412 #ifdef debug_LUNDfragmentation 412 #ifdef debug_LUNDfragmentation
413 G4cout<<"The parton "<<string->GetDecay 413 G4cout<<"The parton "<<string->GetDecayParton()->GetPDGEncoding()<<" "
414 <<" produces hadron "<<HadronDefi 414 <<" produces hadron "<<HadronDefinition->GetParticleName()
415 <<" and is transformed to "<<newS 415 <<" and is transformed to "<<newStringEnd->GetPDGEncoding()<<G4endl;
416 G4cout<<"The side of the string decay L 416 G4cout<<"The side of the string decay Left/Right (1/-1) "<<SideOfDecay<<G4endl;
417 #endif 417 #endif
418 // create new String from old, ie. keep 418 // create new String from old, ie. keep Left and Right order, but replace decay
419 419
420 if ( newString ) delete newString; 420 if ( newString ) delete newString;
421 421
422 newString=new G4FragmentingString(*stri 422 newString=new G4FragmentingString(*string,newStringEnd); // To store possible quark containt of new string
423 423
424 #ifdef debug_LUNDfragmentation 424 #ifdef debug_LUNDfragmentation
425 G4cout<<"An attempt to determine its en 425 G4cout<<"An attempt to determine its energy (SplitEandP)"<<G4endl;
426 #endif 426 #endif
427 G4LorentzVector* HadronMomentum=SplitEa 427 G4LorentzVector* HadronMomentum=SplitEandP(HadronDefinition, string, newString);
428 428
429 delete newString; newString=0; 429 delete newString; newString=0;
430 430
431 G4KineticTrack * Hadron =0; 431 G4KineticTrack * Hadron =0;
432 if ( HadronMomentum != 0 ) { 432 if ( HadronMomentum != 0 ) {
433 433
434 #ifdef debug_LUNDfragmentation 434 #ifdef debug_LUNDfragmentation
435 G4cout<<"The attempt was successful 435 G4cout<<"The attempt was successful"<<G4endl;
436 #endif 436 #endif
437 G4ThreeVector Pos; 437 G4ThreeVector Pos;
438 Hadron = new G4KineticTrack(HadronDefinit 438 Hadron = new G4KineticTrack(HadronDefinition, 0,Pos, *HadronMomentum);
439 439
440 if ( newString ) delete newString; 440 if ( newString ) delete newString;
441 441
442 newString=new G4FragmentingString(*string 442 newString=new G4FragmentingString(*string,newStringEnd,
443 HadronMomentum); 443 HadronMomentum);
444 delete HadronMomentum; 444 delete HadronMomentum;
445 } 445 }
446 else 446 else
447 { 447 {
448 #ifdef debug_LUNDfragmentation 448 #ifdef debug_LUNDfragmentation
449 G4cout<<"The attempt was not succes 449 G4cout<<"The attempt was not successful !!!"<<G4endl;
450 #endif 450 #endif
451 } 451 }
452 452
453 #ifdef debug_LUNDfragmentation 453 #ifdef debug_LUNDfragmentation
454 G4cout<<"End SplitUP (G4VLongitudinalSt 454 G4cout<<"End SplitUP (G4VLongitudinalStringDecay) ====================="<<G4endl;
455 #endif 455 #endif
456 456
457 return Hadron; 457 return Hadron;
458 } 458 }
459 459
460 //-------------------------------------------- 460 //-----------------------------------------------------------------------------
461 461
462 G4ParticleDefinition * G4LundStringFragmentati 462 G4ParticleDefinition * G4LundStringFragmentation::DiQuarkSplitup(G4ParticleDefinition* decay,
463 463 G4ParticleDefinition *&created)
464 { 464 {
465 G4double StrSup=GetStrangeSuppress(); 465 G4double StrSup=GetStrangeSuppress();
466 G4double ProbQQbar = (1.0 - 2.0*StrSup)*1.2 466 G4double ProbQQbar = (1.0 - 2.0*StrSup)*1.25;
467 467
468 //... can Diquark break or not? 468 //... can Diquark break or not?
469 if (G4UniformRand() < DiquarkBreakProb ){ 469 if (G4UniformRand() < DiquarkBreakProb ){
470 470
471 //... Diquark break 471 //... Diquark break
472 G4int stableQuarkEncoding = decay->GetPD 472 G4int stableQuarkEncoding = decay->GetPDGEncoding()/1000;
473 G4int decayQuarkEncoding = (decay->GetPD 473 G4int decayQuarkEncoding = (decay->GetPDGEncoding()/100)%10;
474 if (G4UniformRand() < 0.5) 474 if (G4UniformRand() < 0.5)
475 { 475 {
476 G4int Swap = stableQuarkEncoding; 476 G4int Swap = stableQuarkEncoding;
477 stableQuarkEncoding = decayQuarkEncod 477 stableQuarkEncoding = decayQuarkEncoding;
478 decayQuarkEncoding = Swap; 478 decayQuarkEncoding = Swap;
479 } 479 }
480 480
481 G4int IsParticle=(decayQuarkEncoding>0) 481 G4int IsParticle=(decayQuarkEncoding>0) ? -1 : +1; // if we have a quark, we need antiquark
482 482
483 SetStrangenessSuppression((1.0-ProbQQbar 483 SetStrangenessSuppression((1.0-ProbQQbar)/2.0);
484 pDefPair QuarkPair = CreatePartonPair(Is 484 pDefPair QuarkPair = CreatePartonPair(IsParticle,false); // no diquarks wanted
485 SetStrangenessSuppression((1.0-StrSup)/2 485 SetStrangenessSuppression((1.0-StrSup)/2.0);
486 486
487 //... Build new Diquark 487 //... Build new Diquark
488 G4int QuarkEncoding=QuarkPair.second->Ge 488 G4int QuarkEncoding=QuarkPair.second->GetPDGEncoding();
489 G4int i10 = std::max(std::abs(QuarkEnco 489 G4int i10 = std::max(std::abs(QuarkEncoding), std::abs(stableQuarkEncoding));
490 G4int i20 = std::min(std::abs(QuarkEnco 490 G4int i20 = std::min(std::abs(QuarkEncoding), std::abs(stableQuarkEncoding));
491 G4int spin = (i10 != i20 && G4UniformRan 491 G4int spin = (i10 != i20 && G4UniformRand() <= 0.5)? 1 : 3;
492 G4int NewDecayEncoding = -1*IsParticle*( 492 G4int NewDecayEncoding = -1*IsParticle*(i10 * 1000 + i20 * 100 + spin);
493 created = FindParticle(NewDecayEncoding) 493 created = FindParticle(NewDecayEncoding);
494 G4ParticleDefinition * decayQuark=FindPa 494 G4ParticleDefinition * decayQuark=FindParticle(decayQuarkEncoding);
495 G4ParticleDefinition * had=hadronizer->B 495 G4ParticleDefinition * had=hadronizer->Build(QuarkPair.first, decayQuark);
496 StrangeSuppress=StrSup; 496 StrangeSuppress=StrSup;
497 497
498 return had; 498 return had;
499 499
500 } else { 500 } else {
501 //... Diquark does not break 501 //... Diquark does not break
502 502
503 G4int IsParticle=(decay->GetPDGEncoding( 503 G4int IsParticle=(decay->GetPDGEncoding()>0) ? +1 : -1; // if we have a diquark, we need quark
504 504
505 StrangeSuppress=(1.0 - ProbQQbar)/2.0; 505 StrangeSuppress=(1.0 - ProbQQbar)/2.0;
506 pDefPair QuarkPair = CreatePartonPair(Is 506 pDefPair QuarkPair = CreatePartonPair(IsParticle,false); // no diquarks wanted
507 507
508 created = QuarkPair.second; 508 created = QuarkPair.second;
509 509
510 G4ParticleDefinition * had=hadronizer->B 510 G4ParticleDefinition * had=hadronizer->Build(QuarkPair.first, decay);
511 StrangeSuppress=StrSup; 511 StrangeSuppress=StrSup;
512 512
513 return had; 513 return had;
514 } 514 }
515 } 515 }
516 516
517 //-------------------------------------------- 517 //-----------------------------------------------------------------------------
518 518
519 G4LorentzVector * G4LundStringFragmentation::S 519 G4LorentzVector * G4LundStringFragmentation::SplitEandP(G4ParticleDefinition * pHadron,
520 520 G4FragmentingString * string,
521 521 G4FragmentingString * newString)
522 { 522 {
523 G4LorentzVector String4Momentum=string->Get4 523 G4LorentzVector String4Momentum=string->Get4Momentum();
524 G4double StringMT2=string->MassT2(); 524 G4double StringMT2=string->MassT2();
525 G4double StringMT =std::sqrt(StringMT2); 525 G4double StringMT =std::sqrt(StringMT2);
526 526
527 G4double HadronMass = pHadron->GetPDGMass(); 527 G4double HadronMass = pHadron->GetPDGMass();
528 SetMinimalStringMass(newString); 528 SetMinimalStringMass(newString);
529 529
530 if ( MinimalStringMass < 0.0 ) return n 530 if ( MinimalStringMass < 0.0 ) return nullptr;
531 531
532 #ifdef debug_LUNDfragmentation 532 #ifdef debug_LUNDfragmentation
533 G4cout<<G4endl<<"Start LUND SplitEandP 533 G4cout<<G4endl<<"Start LUND SplitEandP "<<G4endl;
534 G4cout<<"String 4 mom, String M and Mt 534 G4cout<<"String 4 mom, String M and Mt "<<String4Momentum<<" "<<String4Momentum.mag()
535 <<" "<<std::sqrt(StringMT2)<<G4e 535 <<" "<<std::sqrt(StringMT2)<<G4endl;
536 G4cout<<"Hadron "<<pHadron->GetParticl 536 G4cout<<"Hadron "<<pHadron->GetParticleName()<<G4endl;
537 G4cout<<"HadM MinimalStringMassLeft St 537 G4cout<<"HadM MinimalStringMassLeft StringM hM+sM "<<HadronMass<<" "<<MinimalStringMass<<" "
538 <<String4Momentum.mag()<<" "<<Ha 538 <<String4Momentum.mag()<<" "<<HadronMass+MinimalStringMass<<G4endl;
539 #endif 539 #endif
540 540
541 if ((HadronMass + MinimalStringMass > string 541 if ((HadronMass + MinimalStringMass > string->Mass()) || MinimalStringMass < 0.)
542 { 542 {
543 #ifdef debug_LUNDfragmentation 543 #ifdef debug_LUNDfragmentation
544 G4cout<<"Mass of the string is not s 544 G4cout<<"Mass of the string is not sufficient to produce the hadron!"<<G4endl;
545 #endif 545 #endif
546 return 0; 546 return 0;
547 } // have to start all over! 547 } // have to start all over!
548 548
549 String4Momentum.setPz(0.); 549 String4Momentum.setPz(0.);
550 G4ThreeVector StringPt=String4Momentum.vect( 550 G4ThreeVector StringPt=String4Momentum.vect();
551 StringPt.setZ(0.); 551 StringPt.setZ(0.);
552 552
553 // calculate and assign hadron transverse mo 553 // calculate and assign hadron transverse momentum component HadronPx and HadronPy
554 G4ThreeVector HadronPt , RemSysPt; 554 G4ThreeVector HadronPt , RemSysPt;
555 G4double HadronMassT2, ResidualMassT2; 555 G4double HadronMassT2, ResidualMassT2;
556 G4double HadronMt, Pt, Pt2, phi; 556 G4double HadronMt, Pt, Pt2, phi;
557 557
558 G4double TmtCur = Tmt; 558 G4double TmtCur = Tmt;
559 559
560 if ( (string->GetDecayParton()->GetPar 560 if ( (string->GetDecayParton()->GetParticleSubType()== "quark") &&
561 (pHadron->GetBaryonNumber() != 0) 561 (pHadron->GetBaryonNumber() != 0) ) {
562 TmtCur = Tmt*0.37; // q 562 TmtCur = Tmt*0.37; // q->B
563 } else if ( (string->GetDecayParton()- 563 } else if ( (string->GetDecayParton()->GetParticleSubType()== "quark") &&
564 (pHadron->GetBaryonNumber( 564 (pHadron->GetBaryonNumber() == 0) ) {
565 //TmtCur = Tmt; 565 //TmtCur = Tmt; // q->M
566 } else if ( (string->GetDecayParton()->GetPa 566 } else if ( (string->GetDecayParton()->GetParticleSubType()== "di_quark") &&
567 (pHadron->GetBaryonNumber( 567 (pHadron->GetBaryonNumber() == 0) ) {
568 //TmtCur = Tmt*0.89; 568 //TmtCur = Tmt*0.89; // qq -> M
569 } else if ( (string->GetDecayParton()- 569 } else if ( (string->GetDecayParton()->GetParticleSubType()== "di_quark") &&
570 (pHadron->GetBaryonNumber( 570 (pHadron->GetBaryonNumber() != 0) ) {
571 TmtCur = Tmt*1.35; 571 TmtCur = Tmt*1.35; // qq -> B
572 } 572 }
573 573
574 //... sample Pt of the hadron 574 //... sample Pt of the hadron
575 G4int attempt=0; 575 G4int attempt=0;
576 do 576 do
577 { 577 {
578 attempt++; if (attempt > StringLoopI 578 attempt++; if (attempt > StringLoopInterrupt) {return 0;}
579 579
580 HadronMt = HadronMass - TmtCur*G4Log 580 HadronMt = HadronMass - TmtCur*G4Log(G4UniformRand());
581 Pt2 = sqr(HadronMt)-sqr(HadronMass); Pt=st 581 Pt2 = sqr(HadronMt)-sqr(HadronMass); Pt=std::sqrt(Pt2);
582 phi = 2.*pi*G4UniformRand(); 582 phi = 2.*pi*G4UniformRand();
583 HadronPt = G4ThreeVector( Pt*std::co 583 HadronPt = G4ThreeVector( Pt*std::cos(phi), Pt*std::sin(phi), 0. );
584 RemSysPt = StringPt - HadronPt; 584 RemSysPt = StringPt - HadronPt;
585 HadronMassT2 = sqr(HadronMass) + Had 585 HadronMassT2 = sqr(HadronMass) + HadronPt.mag2();
586 ResidualMassT2=sqr(MinimalStringMass 586 ResidualMassT2=sqr(MinimalStringMass) + RemSysPt.mag2();
587 587
588 } while (std::sqrt(HadronMassT2) + std 588 } while (std::sqrt(HadronMassT2) + std::sqrt(ResidualMassT2) > StringMT);
589 589
590 //... sample z to define hadron longitudina 590 //... sample z to define hadron longitudinal momentum and energy
591 //... but first check the available phase sp 591 //... but first check the available phase space
592 592
593 G4double Pz2 = (sqr(StringMT2 - HadronMassT2 593 G4double Pz2 = (sqr(StringMT2 - HadronMassT2 - ResidualMassT2) -
594 4*HadronMassT2 * ResidualMassT2)/4./Stri 594 4*HadronMassT2 * ResidualMassT2)/4./StringMT2;
595 595
596 if (Pz2 < 0 ) {return 0;} // have t 596 if (Pz2 < 0 ) {return 0;} // have to start all over!
597 597
598 //... then compute allowed z region z_min < 598 //... then compute allowed z region z_min <= z <= z_max
599 599
600 G4double Pz = std::sqrt(Pz2); 600 G4double Pz = std::sqrt(Pz2);
601 G4double zMin = (std::sqrt(HadronMassT2+Pz2) 601 G4double zMin = (std::sqrt(HadronMassT2+Pz2) - Pz)/std::sqrt(StringMT2);
602 // G4double zMin = (std::sqrt(HadronMa 602 // G4double zMin = (std::sqrt(HadronMassT2+Pz2) - 0.)/std::sqrt(StringMT2); // For testing purposes
603 G4double zMax = (std::sqrt(HadronMassT2+Pz2) 603 G4double zMax = (std::sqrt(HadronMassT2+Pz2) + Pz)/std::sqrt(StringMT2);
604 604
605 if (zMin >= zMax) return 0; // have to sta 605 if (zMin >= zMax) return 0; // have to start all over!
606 606
607 G4double z = GetLightConeZ(zMin, zMax, 607 G4double z = GetLightConeZ(zMin, zMax,
608 string->GetDecayParton()->Get 608 string->GetDecayParton()->GetPDGEncoding(), pHadron,
609 HadronPt.x(), HadronPt.y()); 609 HadronPt.x(), HadronPt.y());
610 610
611 //... now compute hadron longitudinal moment 611 //... now compute hadron longitudinal momentum and energy
612 // longitudinal hadron momentum component Ha 612 // longitudinal hadron momentum component HadronPz
613 613
614 HadronPt.setZ(0.5* string->GetDecayDirection 614 HadronPt.setZ(0.5* string->GetDecayDirection() *
615 (z * string->LightConeDecay() - 615 (z * string->LightConeDecay() -
616 HadronMassT2/(z * string->LightConeD 616 HadronMassT2/(z * string->LightConeDecay())));
617 G4double HadronE = 0.5* (z * string->LightC 617 G4double HadronE = 0.5* (z * string->LightConeDecay() +
618 HadronMassT2/(z * string->LightConeD 618 HadronMassT2/(z * string->LightConeDecay()));
619 619
620 G4LorentzVector * a4Momentum= new G4LorentzV 620 G4LorentzVector * a4Momentum= new G4LorentzVector(HadronPt,HadronE);
621 621
622 #ifdef debug_LUNDfragmentation 622 #ifdef debug_LUNDfragmentation
623 G4cout<<G4endl<<" string->GetDecayDire 623 G4cout<<G4endl<<" string->GetDecayDirection() "<<string->GetDecayDirection()<<G4endl<<G4endl;
624 G4cout<<"string->LightConeDecay() "<<s 624 G4cout<<"string->LightConeDecay() "<<string->LightConeDecay()<<G4endl;
625 G4cout<<"HadronPt,HadronE "<<HadronPt< 625 G4cout<<"HadronPt,HadronE "<<HadronPt<<" "<<HadronE<<G4endl;
626 G4cout<<"String4Momentum "<<String4Mom 626 G4cout<<"String4Momentum "<<String4Momentum<<G4endl;
627 G4cout<<"Out of LUND SplitEandP "<<G4e 627 G4cout<<"Out of LUND SplitEandP "<<G4endl<<G4endl;
628 #endif 628 #endif
629 629
630 return a4Momentum; 630 return a4Momentum;
631 } 631 }
632 632
633 //-------------------------------------------- 633 //-----------------------------------------------------------------------------------------
634 634
635 G4double G4LundStringFragmentation::GetLightCo 635 G4double G4LundStringFragmentation::GetLightConeZ(G4double zmin, G4double zmax,
636 G4int PD 636 G4int PDGEncodingOfDecayParton,
637 G4Partic 637 G4ParticleDefinition* pHadron,
638 G4double 638 G4double Px, G4double Py)
639 { 639 {
640 G4double Mass = pHadron->GetPDGMass(); 640 G4double Mass = pHadron->GetPDGMass();
641 G4int HadronEncoding=std::abs(pHadron- 641 G4int HadronEncoding=std::abs(pHadron->GetPDGEncoding());
642 642
643 G4double Mt2 = Px*Px + Py*Py + Mass*Mass; 643 G4double Mt2 = Px*Px + Py*Py + Mass*Mass;
644 644
645 G4double Alund, Blund; 645 G4double Alund, Blund;
646 G4double zOfMaxyf(0.), maxYf(1.), z(0.), yf( 646 G4double zOfMaxyf(0.), maxYf(1.), z(0.), yf(1.);
647 647
648 if (!((std::abs(PDGEncodingOfDecayParton) > 648 if (!((std::abs(PDGEncodingOfDecayParton) > 1000) && (HadronEncoding > 1000)) )
649 { // ---------------- Quark fragmentation 649 { // ---------------- Quark fragmentation and qq-> meson ----------------------
650 Alund=1.; 650 Alund=1.;
651 Blund=0.7/GeV/GeV; 651 Blund=0.7/GeV/GeV;
652 652
653 G4double BMt2 = Blund*Mt2; 653 G4double BMt2 = Blund*Mt2;
654 if (Alund == 1.0) { 654 if (Alund == 1.0) {
655 zOfMaxyf=BMt2/(Blund*Mt2 + 1.);} 655 zOfMaxyf=BMt2/(Blund*Mt2 + 1.);}
656 else { 656 else {
657 zOfMaxyf = ((1.0+BMt2) - std::sqrt(sq 657 zOfMaxyf = ((1.0+BMt2) - std::sqrt(sqr(1.0-BMt2) + 4.0*BMt2*Alund))/2.0/(1.-Alund);
658 } 658 }
659 659
660 if (zOfMaxyf < zmin) {zOfMaxyf=zmin;} 660 if (zOfMaxyf < zmin) {zOfMaxyf=zmin;}
661 if (zOfMaxyf > zmax) {zOfMaxyf=zmax;} 661 if (zOfMaxyf > zmax) {zOfMaxyf=zmax;}
662 maxYf=(1-zOfMaxyf)/zOfMaxyf * G4Exp(-Blun 662 maxYf=(1-zOfMaxyf)/zOfMaxyf * G4Exp(-Blund*Mt2/zOfMaxyf);
663 663
664 const G4int maxNumberOfLoops = 1000 664 const G4int maxNumberOfLoops = 1000;
665 G4int loopCounter = 0; 665 G4int loopCounter = 0;
666 do 666 do
667 { 667 {
668 z = zmin + G4UniformRand()*(zmax-zmin); 668 z = zmin + G4UniformRand()*(zmax-zmin);
669 //yf = (1-z)/z * G4Exp(-Blund* 669 //yf = (1-z)/z * G4Exp(-Blund*Mt2/z);
670 yf = G4Pow::GetInstance()->powA(1.0-z,Alun 670 yf = G4Pow::GetInstance()->powA(1.0-z,Alund)/z*G4Exp(-BMt2/z);
671 } 671 }
672 while ( (G4UniformRand()*maxYf > yf) && + 672 while ( (G4UniformRand()*maxYf > yf) && ++loopCounter < maxNumberOfLoops );
673 if ( loopCounter >= maxNumberOfLoop 673 if ( loopCounter >= maxNumberOfLoops ) {
674 z = 0.5*(zmin + zmax); // Just a 674 z = 0.5*(zmin + zmax); // Just a value between zmin and zmax, no physics considerations at all!
675 } 675 }
676 return z; 676 return z;
677 } 677 }
678 678
679 if (std::abs(PDGEncodingOfDecayParton) > 100 679 if (std::abs(PDGEncodingOfDecayParton) > 1000)
680 { 680 {
681 G4double an = 2.5; 681 G4double an = 2.5;
682 an +=(sqr(Px)+sqr(Py))/sqr(GeV 682 an +=(sqr(Px)+sqr(Py))/sqr(GeV)-0.5;
683 z=zmin + (zmax-zmin)*G4Pow::Ge 683 z=zmin + (zmax-zmin)*G4Pow::GetInstance()->powA(G4UniformRand(),1./an);
684 if( PDGEncodingOfDecayParton > 684 if( PDGEncodingOfDecayParton > 3000 ) z=zmin+zmax-z;
685 } 685 }
686 686
687 return z; 687 return z;
688 } 688 }
689 689
690 //-------------------------------------------- 690 //----------------------------------------------------------------------------------------------------------
691 691
692 G4bool G4LundStringFragmentation::SplitLast(G4 692 G4bool G4LundStringFragmentation::SplitLast(G4FragmentingString * string,
693 G4 693 G4KineticTrackVector * LeftVector,
694 G4 694 G4KineticTrackVector * RightVector)
695 { 695 {
696 //... perform last cluster decay 696 //... perform last cluster decay
697 SetMinimalStringMass( string); 697 SetMinimalStringMass( string);
698 if ( MinimalStringMass < 0.) return fa 698 if ( MinimalStringMass < 0.) return false;
699 #ifdef debug_LUNDfragmentation 699 #ifdef debug_LUNDfragmentation
700 G4cout<<G4endl<<"Split last----------- 700 G4cout<<G4endl<<"Split last-----------------------------------------"<<G4endl;
701 G4cout<<"MinimalStringMass "<<MinimalS 701 G4cout<<"MinimalStringMass "<<MinimalStringMass<<G4endl;
702 G4cout<<"Left "<<string->GetLeftParto 702 G4cout<<"Left "<<string->GetLeftParton()->GetPDGEncoding()<<" "<<string->GetPleft()<<G4endl;
703 G4cout<<"Right "<<string->GetRightPart 703 G4cout<<"Right "<<string->GetRightParton()->GetPDGEncoding()<<" "<<string->GetPright()<<G4endl;
704 G4cout<<"String4mom "<<string->GetPstr 704 G4cout<<"String4mom "<<string->GetPstring()<<" "<<string->GetPstring().mag()<<G4endl;
705 #endif 705 #endif
706 706
707 G4LorentzVector Str4Mom=string->Get4Mo 707 G4LorentzVector Str4Mom=string->Get4Momentum();
708 G4LorentzRotation toCms(-1*Str4Mom.boo 708 G4LorentzRotation toCms(-1*Str4Mom.boostVector());
709 G4LorentzVector Pleft = toCms * string 709 G4LorentzVector Pleft = toCms * string->GetPleft();
710 toCms.rotateZ(-1*Pleft.phi()); 710 toCms.rotateZ(-1*Pleft.phi());
711 toCms.rotateY(-1*Pleft.theta()); 711 toCms.rotateY(-1*Pleft.theta());
712 712
713 G4LorentzRotation toObserverFrame= toC 713 G4LorentzRotation toObserverFrame= toCms.inverse();
714 714
715 G4double StringMass=string->Mass(); 715 G4double StringMass=string->Mass();
716 716
717 G4ParticleDefinition * LeftHadron(0), * Righ 717 G4ParticleDefinition * LeftHadron(0), * RightHadron(0);
718 718
719 NumberOf_FS=0; 719 NumberOf_FS=0;
720 for (G4int i=0; i<350; i++) {FS_Weight[i]=0. 720 for (G4int i=0; i<350; i++) {FS_Weight[i]=0.;}
721 721
722 G4int sampledState = 0; 722 G4int sampledState = 0;
723 723
724 #ifdef debug_LUNDfragmentation 724 #ifdef debug_LUNDfragmentation
725 G4cout<<"StrMass "<<StringMass<<" q's 725 G4cout<<"StrMass "<<StringMass<<" q's "
726 <<string->GetLeftParton()->GetPa 726 <<string->GetLeftParton()->GetParticleName()<<" "
727 <<string->GetRightParton()->GetP 727 <<string->GetRightParton()->GetParticleName()<<G4endl;
728 #endif 728 #endif
729 729
730 string->SetLeftPartonStable(); // to query q 730 string->SetLeftPartonStable(); // to query quark contents..
731 731
732 if (string->IsAFourQuarkString() ) 732 if (string->IsAFourQuarkString() )
733 { 733 {
734 G4int IDleft =std::abs(string->GetLe 734 G4int IDleft =std::abs(string->GetLeftParton()->GetPDGEncoding());
735 G4int IDright=std::abs(string->GetRi 735 G4int IDright=std::abs(string->GetRightParton()->GetPDGEncoding());
736 736
737 if ( (IDleft > 3000) || (IDright > 3 737 if ( (IDleft > 3000) || (IDright > 3000) ) {
738 if ( ! Diquark_AntiDiquark_belowTh 738 if ( ! Diquark_AntiDiquark_belowThreshold_lastSplitting(string, LeftHadron, RightHadron) )
739 { 739 {
740 return false; 740 return false;
741 } 741 }
742 } else { 742 } else {
743 // The string is qq-qqbar type. Diquarks a 743 // The string is qq-qqbar type. Diquarks are on the string ends
744 if (StringMass-MinimalStringMass < 0 744 if (StringMass-MinimalStringMass < 0.)
745 { 745 {
746 if (! Diquark_AntiDiquark_belowThreshold 746 if (! Diquark_AntiDiquark_belowThreshold_lastSplitting(string, LeftHadron, RightHadron) )
747 { 747 {
748 return false; 748 return false;
749 } 749 }
750 } else 750 } else
751 { 751 {
752 Diquark_AntiDiquark_aboveThreshold_lastS 752 Diquark_AntiDiquark_aboveThreshold_lastSplitting(string, LeftHadron, RightHadron);
753 753
754 if (NumberOf_FS == 0) return false; 754 if (NumberOf_FS == 0) return false;
755 755
756 sampledState = SampleS 756 sampledState = SampleState();
757 if (string->GetLeftParton()->GetPDGEncod 757 if (string->GetLeftParton()->GetPDGEncoding() < 0)
758 { 758 {
759 LeftHadron =FS_LeftHadron[sampledState 759 LeftHadron =FS_LeftHadron[sampledState];
760 RightHadron=FS_RightHadron[sampledStat 760 RightHadron=FS_RightHadron[sampledState];
761 } else 761 } else
762 { 762 {
763 LeftHadron =FS_RightHadron[sampledStat 763 LeftHadron =FS_RightHadron[sampledState];
764 RightHadron=FS_LeftHadron[sampledState 764 RightHadron=FS_LeftHadron[sampledState];
765 } 765 }
766 } 766 }
767 } // ID > 3300 767 } // ID > 3300
768 } else { 768 } else {
769 if (string->DecayIsQuark() && string->Stab 769 if (string->DecayIsQuark() && string->StableIsQuark() )
770 { //... there are quarks on cluster 770 { //... there are quarks on cluster ends
771 #ifdef debug_LUNDfragm 771 #ifdef debug_LUNDfragmentation
772 G4cout<<"Q Q string La 772 G4cout<<"Q Q string LastSplit"<<G4endl;
773 #endif 773 #endif
774 774
775 Quark_AntiQuark_lastSplitting(string, Le 775 Quark_AntiQuark_lastSplitting(string, LeftHadron, RightHadron);
776 776
777 if (NumberOf_FS == 0) return false; 777 if (NumberOf_FS == 0) return false;
778 sampledState = SampleState() 778 sampledState = SampleState();
779 if (string->GetLeftParton()->GetPDGEncod 779 if (string->GetLeftParton()->GetPDGEncoding() < 0)
780 { 780 {
781 LeftHadron =FS_RightHadron[sampledStat 781 LeftHadron =FS_RightHadron[sampledState];
782 RightHadron=FS_LeftHadron[sampledState 782 RightHadron=FS_LeftHadron[sampledState];
783 } else 783 } else
784 { 784 {
785 LeftHadron =FS_LeftHadron[sampledState 785 LeftHadron =FS_LeftHadron[sampledState];
786 RightHadron=FS_RightHadron[sampledStat 786 RightHadron=FS_RightHadron[sampledState];
787 } 787 }
788 } else 788 } else
789 { //... there is a Diquark on one of 789 { //... there is a Diquark on one of the cluster ends
790 #ifdef debug_LUNDfragm 790 #ifdef debug_LUNDfragmentation
791 G4cout<<"DiQ Q string 791 G4cout<<"DiQ Q string Last Split"<<G4endl;
792 #endif 792 #endif
793 793
794 Quark_Diquark_lastSplitting(string, Left 794 Quark_Diquark_lastSplitting(string, LeftHadron, RightHadron);
795 795
796 if (NumberOf_FS == 0) return false; 796 if (NumberOf_FS == 0) return false;
797 sampledState = SampleState() 797 sampledState = SampleState();
798 798
799 if (string->GetLeftParton()->GetParticle 799 if (string->GetLeftParton()->GetParticleSubType() == "quark")
800 { 800 {
801 LeftHadron =FS_LeftHadron[sampledState 801 LeftHadron =FS_LeftHadron[sampledState];
802 RightHadron=FS_RightHadron[sampledStat 802 RightHadron=FS_RightHadron[sampledState];
803 } else 803 } else
804 { 804 {
805 LeftHadron =FS_RightHadron[sampledStat 805 LeftHadron =FS_RightHadron[sampledState];
806 RightHadron=FS_LeftHadron[sampledState 806 RightHadron=FS_LeftHadron[sampledState];
807 } 807 }
808 } 808 }
809 809
810 } 810 }
811 811
812 #ifdef debug_LUNDfragmentation 812 #ifdef debug_LUNDfragmentation
813 G4cout<<"Sampled hadrons: "<<LeftHadro 813 G4cout<<"Sampled hadrons: "<<LeftHadron->GetParticleName()<<" "<<RightHadron->GetParticleName()<<G4endl;
814 #endif 814 #endif
815 815
816 G4LorentzVector P_left =string->GetPleft(), 816 G4LorentzVector P_left =string->GetPleft(), P_right = string->GetPright();
817 817
818 G4LorentzVector LeftMom, RightMom; 818 G4LorentzVector LeftMom, RightMom;
819 G4ThreeVector Pos; 819 G4ThreeVector Pos;
820 820
821 Sample4Momentum(&LeftMom, LeftHadron->GetPD 821 Sample4Momentum(&LeftMom, LeftHadron->GetPDGMass(),
822 &RightMom, RightHadron->GetPDGMass(), 822 &RightMom, RightHadron->GetPDGMass(),
823 StringMass); 823 StringMass);
824 824
825 // Sample4Momentum ascribes LeftMom.pz 825 // Sample4Momentum ascribes LeftMom.pz() along positive Z axis for baryons in many cases.
826 // It must be negative in case when th 826 // It must be negative in case when the system is moving against Z axis.
827 827
828 if (!(string->DecayIsQuark() && string->Stab 828 if (!(string->DecayIsQuark() && string->StableIsQuark() ))
829 { // Only for qq - q, q - qq, and qq - qqbar 829 { // Only for qq - q, q - qq, and qq - qqbar -------------------
830 830
831 if ( G4UniformRand() <= 0.5 ) 831 if ( G4UniformRand() <= 0.5 )
832 { 832 {
833 if (P_left.z() <= 0.) {G4LorentzVector t 833 if (P_left.z() <= 0.) {G4LorentzVector tmp = LeftMom; LeftMom=RightMom; RightMom=tmp;}
834 } 834 }
835 else 835 else
836 { 836 {
837 if (P_right.z() >= 0.) {G4LorentzVector 837 if (P_right.z() >= 0.) {G4LorentzVector tmp = LeftMom; LeftMom=RightMom; RightMom=tmp;}
838 } 838 }
839 } 839 }
840 840
841 LeftMom *=toObserverFrame; 841 LeftMom *=toObserverFrame;
842 RightMom*=toObserverFrame; 842 RightMom*=toObserverFrame;
843 843
844 LeftVector->push_back(new G4KineticTrack(Lef 844 LeftVector->push_back(new G4KineticTrack(LeftHadron, 0, Pos, LeftMom));
845 RightVector->push_back(new G4KineticTrack(Ri 845 RightVector->push_back(new G4KineticTrack(RightHadron, 0, Pos, RightMom));
846 846
847 string->LorentzRotate(toObserverFrame); 847 string->LorentzRotate(toObserverFrame);
848 return true; 848 return true;
849 } 849 }
850 850
851 //-------------------------------------------- 851 //----------------------------------------------------------------------------------------
852 852
853 G4bool G4LundStringFragmentation:: 853 G4bool G4LundStringFragmentation::
854 Diquark_AntiDiquark_belowThreshold_lastSplitti 854 Diquark_AntiDiquark_belowThreshold_lastSplitting(G4FragmentingString * & string,
855 855 G4ParticleDefinition * & LeftHadron,
856 856 G4ParticleDefinition * & RightHadron)
857 { 857 {
858 G4double StringMass = string->Mass(); 858 G4double StringMass = string->Mass();
859 859
860 G4int cClusterInterrupt = 0; 860 G4int cClusterInterrupt = 0;
861 G4bool isOK = false; 861 G4bool isOK = false;
862 do 862 do
863 { 863 {
864 G4int LeftQuark1= string->GetLeftParton()- 864 G4int LeftQuark1= string->GetLeftParton()->GetPDGEncoding()/1000;
865 G4int LeftQuark2=(string->GetLeftParton()- 865 G4int LeftQuark2=(string->GetLeftParton()->GetPDGEncoding()/100)%10;
866 866
867 G4int RightQuark1= string->GetRightParton( 867 G4int RightQuark1= string->GetRightParton()->GetPDGEncoding()/1000;
868 G4int RightQuark2=(string->GetRightParton( 868 G4int RightQuark2=(string->GetRightParton()->GetPDGEncoding()/100)%10;
869 869
870 if (G4UniformRand()<0.5) 870 if (G4UniformRand()<0.5)
871 { 871 {
872 LeftHadron =hadronizer->Build(FindPartic 872 LeftHadron =hadronizer->Build(FindParticle( LeftQuark1),
873 FindParticle(RightQuark1)); 873 FindParticle(RightQuark1));
874 RightHadron= (LeftHadron == nullptr) ? n 874 RightHadron= (LeftHadron == nullptr) ? nullptr :
875 875 hadronizer->Build(FindParticle( LeftQuark2),
876 FindParticle(RightQuark2)); 876 FindParticle(RightQuark2));
877 } else 877 } else
878 { 878 {
879 LeftHadron =hadronizer->Build(FindPartic 879 LeftHadron =hadronizer->Build(FindParticle( LeftQuark1),
880 FindParticle(RightQuark2)); 880 FindParticle(RightQuark2));
881 RightHadron=(LeftHadron == nullptr) ? nu 881 RightHadron=(LeftHadron == nullptr) ? nullptr :
882 hadronizer 882 hadronizer->Build(FindParticle( LeftQuark2),
883 FindParticle(RightQuark1)); 883 FindParticle(RightQuark1));
884 } 884 }
885 885
886 isOK = (LeftHadron != nullptr) && (RightHa 886 isOK = (LeftHadron != nullptr) && (RightHadron != nullptr);
887 887
888 if(isOK) { isOK = (StringMass > LeftHadron 888 if(isOK) { isOK = (StringMass > LeftHadron->GetPDGMass() + RightHadron->GetPDGMass()); }
889 ++cClusterInterrupt; 889 ++cClusterInterrupt;
890 //... repeat procedure, if mass of cluster 890 //... repeat procedure, if mass of cluster is too low to produce hadrons
891 //... ClusterMassCut = 0.15*GeV model para 891 //... ClusterMassCut = 0.15*GeV model parameter
892 } 892 }
893 while (isOK == false && cClusterInterrupt < 893 while (isOK == false && cClusterInterrupt < ClusterLoopInterrupt);
894 /* Loop checking, 07.08.2015, A.Ribon */ 894 /* Loop checking, 07.08.2015, A.Ribon */
895 return isOK; 895 return isOK;
896 } 896 }
897 897
898 //-------------------------------------------- 898 //----------------------------------------------------------------------------------------
899 899
900 G4bool G4LundStringFragmentation:: 900 G4bool G4LundStringFragmentation::
901 Diquark_AntiDiquark_aboveThreshold_lastSplitti 901 Diquark_AntiDiquark_aboveThreshold_lastSplitting(G4FragmentingString * & string,
902 902 G4ParticleDefinition * & LeftHadron,
903 903 G4ParticleDefinition * & RightHadron)
904 { 904 {
905 // StringMass-MinimalStringMass > 0. Creatio 905 // StringMass-MinimalStringMass > 0. Creation of 2 baryons is possible ----
906 906
907 G4double StringMass = string->Mass(); 907 G4double StringMass = string->Mass();
908 G4double StringMassSqr= sqr(StringMass); 908 G4double StringMassSqr= sqr(StringMass);
909 G4ParticleDefinition * Di_Quark; 909 G4ParticleDefinition * Di_Quark;
910 G4ParticleDefinition * Anti_Di_Quark; 910 G4ParticleDefinition * Anti_Di_Quark;
911 911
912 if (string->GetLeftParton()->GetPDGEncoding( 912 if (string->GetLeftParton()->GetPDGEncoding() < 0)
913 { 913 {
914 Anti_Di_Quark =string->GetLeftParton(); 914 Anti_Di_Quark =string->GetLeftParton();
915 Di_Quark=string->GetRightParton(); 915 Di_Quark=string->GetRightParton();
916 } else 916 } else
917 { 917 {
918 Anti_Di_Quark =string->GetRightParton(); 918 Anti_Di_Quark =string->GetRightParton();
919 Di_Quark=string->GetLeftParton(); 919 Di_Quark=string->GetLeftParton();
920 } 920 }
921 921
922 G4int IDAnti_di_quark =Anti_Di_Quark->Get 922 G4int IDAnti_di_quark =Anti_Di_Quark->GetPDGEncoding();
923 G4int AbsIDAnti_di_quark =std::abs(IDAnti_di 923 G4int AbsIDAnti_di_quark =std::abs(IDAnti_di_quark);
924 G4int IDdi_quark =Di_Quark->GetPDGEn 924 G4int IDdi_quark =Di_Quark->GetPDGEncoding();
925 G4int AbsIDdi_quark =std::abs(IDdi_quar 925 G4int AbsIDdi_quark =std::abs(IDdi_quark);
926 926
927 G4int ADi_q1=AbsIDAnti_di_quark/1000; 927 G4int ADi_q1=AbsIDAnti_di_quark/1000;
928 G4int ADi_q2=(AbsIDAnti_di_quark-ADi_q1*1000 928 G4int ADi_q2=(AbsIDAnti_di_quark-ADi_q1*1000)/100;
929 929
930 G4int Di_q1=AbsIDdi_quark/1000; 930 G4int Di_q1=AbsIDdi_quark/1000;
931 G4int Di_q2=(AbsIDdi_quark-Di_q1*1000)/100; 931 G4int Di_q2=(AbsIDdi_quark-Di_q1*1000)/100;
932 932
933 NumberOf_FS=0; 933 NumberOf_FS=0;
934 for (G4int ProdQ=1; ProdQ < 6; ProdQ++) 934 for (G4int ProdQ=1; ProdQ < 6; ProdQ++)
935 { 935 {
936 G4int StateADiQ=0; 936 G4int StateADiQ=0;
937 const G4int maxNumberOfLoops = 937 const G4int maxNumberOfLoops = 1000;
938 G4int loopCounter = 0; 938 G4int loopCounter = 0;
939 do // while(Meson[AbsIDquark-1][ProdQ-1][ 939 do // while(Meson[AbsIDquark-1][ProdQ-1][StateQ]<>0);
940 { 940 {
941 LeftHadron=G4ParticleTable::GetParticleT 941 LeftHadron=G4ParticleTable::GetParticleTable()->FindParticle(
942 -Baryon[ADi_q1-1][ADi_q2-1][Prod 942 -Baryon[ADi_q1-1][ADi_q2-1][ProdQ-1][StateADiQ]);
943 943
944 if (LeftHadron == NULL) continue; 944 if (LeftHadron == NULL) continue;
945 G4double LeftHadronMass=LeftHadron->GetP 945 G4double LeftHadronMass=LeftHadron->GetPDGMass();
946 946
947 G4int StateDiQ=0; 947 G4int StateDiQ=0;
948 const G4int maxNumberO 948 const G4int maxNumberOfInternalLoops = 1000;
949 G4int internalLoopCoun 949 G4int internalLoopCounter = 0;
950 do // while(Baryon[Di_q1-1][Di_q2-1][Pro 950 do // while(Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]<>0);
951 { 951 {
952 RightHadron=G4ParticleTable::GetPartic 952 RightHadron=G4ParticleTable::GetParticleTable()->FindParticle(
953 +Baryon[Di_q1-1][Di_q2-1][Prod 953 +Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]);
954 954
955 if (RightHadron == NULL) continue; 955 if (RightHadron == NULL) continue;
956 G4double RightHadronMass=RightHadron-> 956 G4double RightHadronMass=RightHadron->GetPDGMass();
957 957
958 if (StringMass > LeftHadronMass + Righ 958 if (StringMass > LeftHadronMass + RightHadronMass)
959 { 959 {
960 if ( N 960 if ( NumberOf_FS > 349 ) {
961 G4Ex 961 G4ExceptionDescription ed;
962 ed < 962 ed << " NumberOf_FS exceeds its limit: NumberOf_FS=" << NumberOf_FS << G4endl;
963 G4Ex 963 G4Exception( "G4LundStringFragmentation::Diquark_AntiDiquark_aboveThreshold_lastSplitting ",
964 964 "HAD_LUND_001", JustWarning, ed );
965 Numb 965 NumberOf_FS = 349;
966 } 966 }
967 967
968 G4double FS_Psqr=lambda(StringMassSq 968 G4double FS_Psqr=lambda(StringMassSqr,sqr(LeftHadronMass),
969 sqr(RightHadronMass)); 969 sqr(RightHadronMass));
970 //FS_Psqr=1.; 970 //FS_Psqr=1.;
971 FS_Weight[NumberOf_FS]=std::sqrt(FS_ 971 FS_Weight[NumberOf_FS]=std::sqrt(FS_Psqr)*FS_Psqr*
972 BaryonWeight[ADi_q1-1][AD 972 BaryonWeight[ADi_q1-1][ADi_q2-1][ProdQ-1][StateADiQ]*
973 BaryonWeight[Di_q1-1][Di_ 973 BaryonWeight[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]*
974 Prob_QQbar[ProdQ-1]; 974 Prob_QQbar[ProdQ-1];
975 975
976 FS_LeftHadron[NumberOf_FS] = LeftHad 976 FS_LeftHadron[NumberOf_FS] = LeftHadron;
977 FS_RightHadron[NumberOf_FS]= RightHa 977 FS_RightHadron[NumberOf_FS]= RightHadron;
978 NumberOf_FS++; 978 NumberOf_FS++;
979 } // End of if (StringMass > LeftHadro 979 } // End of if (StringMass > LeftHadronMass + RightHadronMass)
980 980
981 StateDiQ++; 981 StateDiQ++;
982 982
983 } while( (Baryon[Di_q1-1][Di_q2-1][ProdQ 983 } while( (Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]!=0) &&
984 ++internalLoo 984 ++internalLoopCounter < maxNumberOfInternalLoops );
985 if ( internalLoopCount 985 if ( internalLoopCounter >= maxNumberOfInternalLoops ) {
986 return false; 986 return false;
987 } 987 }
988 988
989 StateADiQ++; 989 StateADiQ++;
990 } while( (Baryon[ADi_q1-1][ADi_q2-1][ProdQ 990 } while( (Baryon[ADi_q1-1][ADi_q2-1][ProdQ-1][StateADiQ]!=0) &&
991 ++loopCounter < maxNu 991 ++loopCounter < maxNumberOfLoops );
992 if ( loopCounter >= maxNumberO 992 if ( loopCounter >= maxNumberOfLoops ) {
993 return false; 993 return false;
994 } 994 }
995 } // End of for (G4int ProdQ=1; ProdQ < 4; P 995 } // End of for (G4int ProdQ=1; ProdQ < 4; ProdQ++)
996 996
997 return true; 997 return true;
998 } 998 }
999 999
1000 //------------------------------------------- 1000 //----------------------------------------------------------------------------------------
1001 1001
1002 G4bool G4LundStringFragmentation::Quark_Diqua 1002 G4bool G4LundStringFragmentation::Quark_Diquark_lastSplitting(G4FragmentingString * & string,
1003 1003 G4ParticleDefinition * & LeftHadron,
1004 1004 G4ParticleDefinition * & RightHadron)
1005 { 1005 {
1006 G4double StringMass = string->Mass(); 1006 G4double StringMass = string->Mass();
1007 G4double StringMassSqr= sqr(StringMass); 1007 G4double StringMassSqr= sqr(StringMass);
1008 1008
1009 G4ParticleDefinition * Di_Quark; 1009 G4ParticleDefinition * Di_Quark;
1010 G4ParticleDefinition * Quark; 1010 G4ParticleDefinition * Quark;
1011 1011
1012 if (string->GetLeftParton()->GetParticleSub 1012 if (string->GetLeftParton()->GetParticleSubType()== "quark")
1013 { 1013 {
1014 Quark =string->GetLeftParton(); 1014 Quark =string->GetLeftParton();
1015 Di_Quark=string->GetRightParton(); 1015 Di_Quark=string->GetRightParton();
1016 } else 1016 } else
1017 { 1017 {
1018 Quark =string->GetRightParton(); 1018 Quark =string->GetRightParton();
1019 Di_Quark=string->GetLeftParton(); 1019 Di_Quark=string->GetLeftParton();
1020 } 1020 }
1021 1021
1022 G4int IDquark =Quark->GetPDGEncoding 1022 G4int IDquark =Quark->GetPDGEncoding();
1023 G4int AbsIDquark =std::abs(IDquark); 1023 G4int AbsIDquark =std::abs(IDquark);
1024 G4int IDdi_quark =Di_Quark->GetPDGEncodin 1024 G4int IDdi_quark =Di_Quark->GetPDGEncoding();
1025 G4int AbsIDdi_quark=std::abs(IDdi_quark); 1025 G4int AbsIDdi_quark=std::abs(IDdi_quark);
1026 G4int Di_q1=AbsIDdi_quark/1000; 1026 G4int Di_q1=AbsIDdi_quark/1000;
1027 G4int Di_q2=(AbsIDdi_quark-Di_q1*1000)/100; 1027 G4int Di_q2=(AbsIDdi_quark-Di_q1*1000)/100;
1028 G4int SignDiQ= 1; 1028 G4int SignDiQ= 1;
1029 if (IDdi_quark < 0) SignDiQ=-1; 1029 if (IDdi_quark < 0) SignDiQ=-1;
1030 1030
1031 NumberOf_FS=0; 1031 NumberOf_FS=0;
1032 for (G4int ProdQ=1; ProdQ < 4; ProdQ++) // 1032 for (G4int ProdQ=1; ProdQ < 4; ProdQ++) // Loop over quark-antiquark cases: u-ubar, d-dbar, s-sbar
1033 { // 1033 { // (as last splitting, do not consider c-cbar and b-bbar cases)
1034 G4int SignQ; 1034 G4int SignQ;
1035 if (IDquark > 0) 1035 if (IDquark > 0)
1036 { 1036 {
1037 SignQ=-1; 1037 SignQ=-1;
1038 if (IDquark == 2) 1038 if (IDquark == 2) SignQ= 1;
1039 if ((IDquark == 1) && (ProdQ == 3)) Sig 1039 if ((IDquark == 1) && (ProdQ == 3)) SignQ= 1; // K0
1040 if ((IDquark == 3) && (ProdQ == 1)) Sig 1040 if ((IDquark == 3) && (ProdQ == 1)) SignQ=-1; // K0bar
1041 if (IDquark == 4) 1041 if (IDquark == 4) SignQ= 1; // D+, D0, Ds+
1042 if (IDquark == 5) Sig 1042 if (IDquark == 5) SignQ=-1; // B-, anti_B0, anti_Bs0
1043 } else 1043 } else
1044 { 1044 {
1045 SignQ= 1; 1045 SignQ= 1;
1046 if (IDquark == -2) Sig 1046 if (IDquark == -2) SignQ=-1;
1047 if ((IDquark ==-1) && (ProdQ == 3)) Sig 1047 if ((IDquark ==-1) && (ProdQ == 3)) SignQ=-1; // K0bar
1048 if ((IDquark ==-3) && (ProdQ == 1)) Sig 1048 if ((IDquark ==-3) && (ProdQ == 1)) SignQ= 1; // K0
1049 if (IDquark == -4) Sig 1049 if (IDquark == -4) SignQ=-1; // D-, anti_D0, anti_Ds+
1050 if (IDquark == -5) Sig 1050 if (IDquark == -5) SignQ= 1; // B+, B0, Bs0
1051 } 1051 }
1052 1052
1053 if (AbsIDquark == ProdQ) SignQ 1053 if (AbsIDquark == ProdQ) SignQ= 1;
1054 1054
1055 G4int StateQ=0; 1055 G4int StateQ=0;
1056 const G4int maxNumberOfLoops 1056 const G4int maxNumberOfLoops = 1000;
1057 G4int loopCounter = 0; 1057 G4int loopCounter = 0;
1058 do // while(Meson[AbsIDquark-1][ProdQ-1] 1058 do // while(Meson[AbsIDquark-1][ProdQ-1][StateQ]<>0);
1059 { 1059 {
1060 LeftHadron=G4ParticleTable::GetParticle 1060 LeftHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignQ*
1061 Meson[AbsIDquark-1][ProdQ-1][St 1061 Meson[AbsIDquark-1][ProdQ-1][StateQ]);
1062 if (LeftHadron == NULL) continue; 1062 if (LeftHadron == NULL) continue;
1063 G4double LeftHadronMass=LeftHadron->Get 1063 G4double LeftHadronMass=LeftHadron->GetPDGMass();
1064 1064
1065 G4int StateDiQ=0; 1065 G4int StateDiQ=0;
1066 const G4int maxNumber 1066 const G4int maxNumberOfInternalLoops = 1000;
1067 G4int internalLoopCou 1067 G4int internalLoopCounter = 0;
1068 do // while(Baryon[Di_q1-1][Di_q2-1][Pr 1068 do // while(Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]<>0);
1069 { 1069 {
1070 RightHadron=G4ParticleTable::GetParti 1070 RightHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignDiQ*
1071 Baryon[Di_q1-1][Di_q2-1][Prod 1071 Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]);
1072 if (RightHadron == NULL) continue; 1072 if (RightHadron == NULL) continue;
1073 G4double RightHadronMass=RightHadron- 1073 G4double RightHadronMass=RightHadron->GetPDGMass();
1074 1074
1075 if (StringMass > LeftHadronMass + Rig 1075 if (StringMass > LeftHadronMass + RightHadronMass)
1076 { 1076 {
1077 if ( 1077 if ( NumberOf_FS > 349 ) {
1078 G4E 1078 G4ExceptionDescription ed;
1079 ed 1079 ed << " NumberOf_FS exceeds its limit: NumberOf_FS=" << NumberOf_FS << G4endl;
1080 G4E 1080 G4Exception( "G4LundStringFragmentation::Quark_Diquark_lastSplitting ",
1081 1081 "HAD_LUND_002", JustWarning, ed );
1082 Num 1082 NumberOf_FS = 349;
1083 } 1083 }
1084 1084
1085 G4double FS_Psqr=lambda(StringMassS 1085 G4double FS_Psqr=lambda(StringMassSqr,sqr(LeftHadronMass),
1086 sqr(RightHadronMass)); 1086 sqr(RightHadronMass));
1087 FS_Weight[NumberOf_FS]=std::sqrt(FS 1087 FS_Weight[NumberOf_FS]=std::sqrt(FS_Psqr)*
1088 MesonWeight[AbsIDquark-1 1088 MesonWeight[AbsIDquark-1][ProdQ-1][StateQ]*
1089 BaryonWeight[Di_q1-1][Di 1089 BaryonWeight[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]*
1090 Prob_QQbar[ProdQ-1]; 1090 Prob_QQbar[ProdQ-1];
1091 1091
1092 FS_LeftHadron[NumberOf_FS] = LeftHa 1092 FS_LeftHadron[NumberOf_FS] = LeftHadron;
1093 FS_RightHadron[NumberOf_FS]= RightH 1093 FS_RightHadron[NumberOf_FS]= RightHadron;
1094 1094
1095 NumberOf_FS++; 1095 NumberOf_FS++;
1096 } // End of if (StringMass > LeftHadr 1096 } // End of if (StringMass > LeftHadronMass + RightHadronMass)
1097 1097
1098 StateDiQ++; 1098 StateDiQ++;
1099 1099
1100 } while( (Baryon[Di_q1-1][Di_q2-1][Prod 1100 } while( (Baryon[Di_q1-1][Di_q2-1][ProdQ-1][StateDiQ]!=0) &&
1101 ++internalLo 1101 ++internalLoopCounter < maxNumberOfInternalLoops );
1102 if ( internalLoopCoun 1102 if ( internalLoopCounter >= maxNumberOfInternalLoops ) {
1103 return false; 1103 return false;
1104 } 1104 }
1105 1105
1106 StateQ++; 1106 StateQ++;
1107 } while( (Meson[AbsIDquark-1][ProdQ-1][St 1107 } while( (Meson[AbsIDquark-1][ProdQ-1][StateQ]!=0) &&
1108 ++loopCounter < maxN 1108 ++loopCounter < maxNumberOfLoops ); /* Loop checking, 07.08.2015, A.Ribon */
1109 1109
1110 if ( loopCounter >= maxNumb 1110 if ( loopCounter >= maxNumberOfLoops ) {
1111 return false; 1111 return false;
1112 } 1112 }
1113 } 1113 }
1114 1114
1115 return true; 1115 return true;
1116 } 1116 }
1117 1117
1118 //------------------------------------------- 1118 //----------------------------------------------------------------------------------------
1119 1119
1120 G4bool G4LundStringFragmentation::Quark_AntiQ 1120 G4bool G4LundStringFragmentation::Quark_AntiQuark_lastSplitting(G4FragmentingString * & string,
1121 1121 G4ParticleDefinition * & LeftHadron,
1122 1122 G4ParticleDefinition * & RightHadron)
1123 { 1123 {
1124 G4double StringMass = string->Mass(); 1124 G4double StringMass = string->Mass();
1125 G4double StringMassSqr= sqr(StringMass); 1125 G4double StringMassSqr= sqr(StringMass);
1126 1126
1127 G4ParticleDefinition * Quark; 1127 G4ParticleDefinition * Quark;
1128 G4ParticleDefinition * Anti_Quark; 1128 G4ParticleDefinition * Anti_Quark;
1129 1129
1130 if (string->GetLeftParton()->GetPDGEncoding 1130 if (string->GetLeftParton()->GetPDGEncoding()>0)
1131 { 1131 {
1132 Quark =string->GetLeftParton(); 1132 Quark =string->GetLeftParton();
1133 Anti_Quark=string->GetRightParton(); 1133 Anti_Quark=string->GetRightParton();
1134 } else 1134 } else
1135 { 1135 {
1136 Quark =string->GetRightParton(); 1136 Quark =string->GetRightParton();
1137 Anti_Quark=string->GetLeftParton(); 1137 Anti_Quark=string->GetLeftParton();
1138 } 1138 }
1139 1139
1140 G4int IDquark =Quark->GetPDGEncodin 1140 G4int IDquark =Quark->GetPDGEncoding();
1141 G4int AbsIDquark =std::abs(IDquark); 1141 G4int AbsIDquark =std::abs(IDquark);
1142 G4int QuarkCharge =Qcharge[IDquar 1142 G4int QuarkCharge =Qcharge[IDquark-1];
1143 1143
1144 G4int IDanti_quark =Anti_Quark->GetPDGEn 1144 G4int IDanti_quark =Anti_Quark->GetPDGEncoding();
1145 G4int AbsIDanti_quark =std::abs(IDanti_quar 1145 G4int AbsIDanti_quark =std::abs(IDanti_quark);
1146 G4int AntiQuarkCharge =-Qcharge[AbsID 1146 G4int AntiQuarkCharge =-Qcharge[AbsIDanti_quark-1];
1147 1147
1148 G4int LeftHadronCharge(0), RightHadro 1148 G4int LeftHadronCharge(0), RightHadronCharge(0);
1149 1149
1150 //G4cout<<"Q Qbar "<<IDquark<<" "<<ID 1150 //G4cout<<"Q Qbar "<<IDquark<<" "<<IDanti_quark<<G4endl;
1151 1151
1152 NumberOf_FS=0; 1152 NumberOf_FS=0;
1153 for (G4int ProdQ=1; ProdQ < 4; ProdQ++) // 1153 for (G4int ProdQ=1; ProdQ < 4; ProdQ++) // Loop over quark-antiquark cases: u-ubar, d-dbar, s-sbar
1154 { // 1154 { // (as last splitting, do not consider c-cbar and b-bbar cases)
1155 //G4cout<<"NumberOf_FS ProdQ 1155 //G4cout<<"NumberOf_FS ProdQ "<<NumberOf_FS<<" "<<ProdQ<<G4endl;
1156 LeftHadronCharge = QuarkCharge - Qcharge[ 1156 LeftHadronCharge = QuarkCharge - Qcharge[ProdQ-1];
1157 G4int SignQ = LeftHadronCharge/3; if (Sig 1157 G4int SignQ = LeftHadronCharge/3; if (SignQ == 0) SignQ = 1;
1158 1158
1159 if ((IDquark == 1) && (ProdQ == 3)) SignQ 1159 if ((IDquark == 1) && (ProdQ == 3)) SignQ= 1; // K0 (d,sbar)
1160 if ((IDquark == 3) && (ProdQ == 1)) SignQ 1160 if ((IDquark == 3) && (ProdQ == 1)) SignQ=-1; // K0bar (s,dbar)
1161 if ((IDquark == 4) && (ProdQ 1161 if ((IDquark == 4) && (ProdQ == 2)) SignQ= 1; // D0 (c,ubar)
1162 if ((IDquark == 5) && (ProdQ 1162 if ((IDquark == 5) && (ProdQ == 1)) SignQ=-1; // anti_B0 (b,dbar)
1163 if ((IDquark == 5) && (ProdQ 1163 if ((IDquark == 5) && (ProdQ == 3)) SignQ=-1; // anti_Bs0 (b,sbar)
1164 1164
1165 RightHadronCharge = AntiQuark 1165 RightHadronCharge = AntiQuarkCharge + Qcharge[ProdQ-1];
1166 G4int SignAQ = RightHadronCharge/3; if (S 1166 G4int SignAQ = RightHadronCharge/3; if (SignAQ == 0) SignAQ = 1;
1167 1167
1168 if ((IDanti_quark ==-1) && (ProdQ == 3)) 1168 if ((IDanti_quark ==-1) && (ProdQ == 3)) SignAQ=-1; // K0bar (dbar,s)
1169 if ((IDanti_quark ==-3) && (ProdQ == 1)) 1169 if ((IDanti_quark ==-3) && (ProdQ == 1)) SignAQ= 1; // K0 (sbar,d)
1170 if ((IDanti_quark ==-4) && (ProdQ == 2)) 1170 if ((IDanti_quark ==-4) && (ProdQ == 2)) SignAQ=-1; // anti_D0 (cbar,u)
1171 if ((IDanti_quark ==-5) && (ProdQ == 1)) 1171 if ((IDanti_quark ==-5) && (ProdQ == 1)) SignAQ= 1; // B0 (bbar,d)
1172 if ((IDanti_quark ==-5) && (ProdQ == 3)) 1172 if ((IDanti_quark ==-5) && (ProdQ == 3)) SignAQ= 1; // Bs0 (bbar,s)
1173 1173
1174 //G4cout<<"ProQ signs "<<Prod 1174 //G4cout<<"ProQ signs "<<ProdQ<<" "<<SignQ<<" "<<SignAQ<<G4endl;
1175 1175
1176 G4int StateQ=0; 1176 G4int StateQ=0;
1177 const G4int maxNumberOfLoops 1177 const G4int maxNumberOfLoops = 1000;
1178 G4int loopCounter = 0; 1178 G4int loopCounter = 0;
1179 do 1179 do
1180 { 1180 {
1181 //G4cout<<"[AbsIDquar 1181 //G4cout<<"[AbsIDquark-1][ProdQ-1][StateQ "<<AbsIDquark-1<<" "
1182 //<<ProdQ-1<<" "<<Sta 1182 //<<ProdQ-1<<" "<<StateQ<<" "<<SignQ*Meson[AbsIDquark-1][ProdQ-1][StateQ]<<G4endl;
1183 LeftHadron=G4ParticleTable::GetParticle 1183 LeftHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignQ*
1184 Meson[AbsIDquark-1][ProdQ- 1184 Meson[AbsIDquark-1][ProdQ-1][StateQ]);
1185 //G4cout<<"LeftHadron 1185 //G4cout<<"LeftHadron "<<LeftHadron<<G4endl;
1186 if (LeftHadron == NULL) { StateQ++; con 1186 if (LeftHadron == NULL) { StateQ++; continue; }
1187 //G4cout<<"LeftHadron 1187 //G4cout<<"LeftHadron "<<LeftHadron->GetParticleName()<<G4endl;
1188 G4double LeftHadronMass=LeftHadron->Get 1188 G4double LeftHadronMass=LeftHadron->GetPDGMass();
1189 1189
1190 G4int StateAQ=0; 1190 G4int StateAQ=0;
1191 const G4int maxNumber 1191 const G4int maxNumberOfInternalLoops = 1000;
1192 G4int internalLoopCou 1192 G4int internalLoopCounter = 0;
1193 do 1193 do
1194 { 1194 {
1195 //G4cout<<" 1195 //G4cout<<" [AbsIDanti_quark-1][ProdQ-1][StateAQ] "<<AbsIDanti_quark-1<<" "
1196 // <<Pro 1196 // <<ProdQ-1<<" "<<StateAQ<<" "<<SignAQ*Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ]<<G4endl;
1197 RightHadron=G4ParticleTable::GetParti 1197 RightHadron=G4ParticleTable::GetParticleTable()->FindParticle(SignAQ*
1198 Meson[AbsIDanti_quark-1][Prod 1198 Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ]);
1199 //G4cout<<"Ri 1199 //G4cout<<"RightHadron "<<RightHadron<<G4endl;
1200 if(RightHadron == NULL) { StateAQ++; 1200 if(RightHadron == NULL) { StateAQ++; continue; }
1201 //G4cout<<"Ri 1201 //G4cout<<"RightHadron "<<RightHadron->GetParticleName()<<G4endl;
1202 G4double RightHadronMass=RightHadron- 1202 G4double RightHadronMass=RightHadron->GetPDGMass();
1203 1203
1204 if (StringMass > LeftHadronMass + Rig 1204 if (StringMass > LeftHadronMass + RightHadronMass)
1205 { 1205 {
1206 if ( 1206 if ( NumberOf_FS > 349 ) {
1207 G4E 1207 G4ExceptionDescription ed;
1208 ed 1208 ed << " NumberOf_FS exceeds its limit: NumberOf_FS=" << NumberOf_FS << G4endl;
1209 G4E 1209 G4Exception( "G4LundStringFragmentation::Quark_AntiQuark_lastSplitting ",
1210 1210 "HAD_LUND_003", JustWarning, ed );
1211 Num 1211 NumberOf_FS = 349;
1212 } 1212 }
1213 1213
1214 G4dou 1214 G4double FS_Psqr=lambda(StringMassSqr,sqr(LeftHadronMass),
1215 sqr(RightHadronMass)); 1215 sqr(RightHadronMass));
1216 //FS_Psqr=1.; 1216 //FS_Psqr=1.;
1217 FS_Weight[NumberOf_FS]=std::sqrt(FS 1217 FS_Weight[NumberOf_FS]=std::sqrt(FS_Psqr)*
1218 MesonWeight[AbsIDquark-1 1218 MesonWeight[AbsIDquark-1][ProdQ-1][StateQ]*
1219 MesonWeight[AbsIDanti_qu 1219 MesonWeight[AbsIDanti_quark-1][ProdQ-1][StateAQ]*
1220 Prob_QQbar[ProdQ-1]; 1220 Prob_QQbar[ProdQ-1];
1221 if (string->GetLeftParton()->GetPDG 1221 if (string->GetLeftParton()->GetPDGEncoding()>0)
1222 { 1222 {
1223 FS_LeftHadron[NumberOf_FS] = Righ 1223 FS_LeftHadron[NumberOf_FS] = RightHadron;
1224 FS_RightHadron[NumberOf_FS]= Left 1224 FS_RightHadron[NumberOf_FS]= LeftHadron;
1225 } else 1225 } else
1226 { 1226 {
1227 FS_LeftHadron[NumberOf_FS] = Left 1227 FS_LeftHadron[NumberOf_FS] = LeftHadron;
1228 FS_RightHadron[NumberOf_FS]= Righ 1228 FS_RightHadron[NumberOf_FS]= RightHadron;
1229 } 1229 }
1230 1230
1231 NumberOf_FS++; 1231 NumberOf_FS++;
1232 1232
1233 } 1233 }
1234 1234
1235 StateAQ++; 1235 StateAQ++;
1236 //G4cout<<" 1236 //G4cout<<" StateAQ Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ] "<<StateAQ<<" "
1237 // <<Mes 1237 // <<Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ]<<" "<<internalLoopCounter<<G4endl;
1238 } while ( (Meson[AbsIDanti_quark-1][Pro 1238 } while ( (Meson[AbsIDanti_quark-1][ProdQ-1][StateAQ]!=0) &&
1239 ++internalL 1239 ++internalLoopCounter < maxNumberOfInternalLoops );
1240 if ( internalLoopCo 1240 if ( internalLoopCounter >= maxNumberOfInternalLoops ) {
1241 return false; 1241 return false;
1242 } 1242 }
1243 1243
1244 StateQ++; 1244 StateQ++;
1245 //G4cout<<"StateQ Mes 1245 //G4cout<<"StateQ Meson[AbsIDquark-1][ProdQ-1][StateQ] "<<StateQ<<" "
1246 // <<Meson[AbsID 1246 // <<Meson[AbsIDquark-1][ProdQ-1][StateQ]<<" "<<loopCounter<<G4endl;
1247 1247
1248 } while ( (Meson[AbsIDquark-1][ProdQ-1][S 1248 } while ( (Meson[AbsIDquark-1][ProdQ-1][StateQ]!=0) &&
1249 ++loopCounter < maxN 1249 ++loopCounter < maxNumberOfLoops );
1250 if ( loopCounter >= maxNumb 1250 if ( loopCounter >= maxNumberOfLoops ) {
1251 return false; 1251 return false;
1252 } 1252 }
1253 } // End of for (G4int ProdQ=1; ProdQ < 4; 1253 } // End of for (G4int ProdQ=1; ProdQ < 4; ProdQ++)
1254 1254
1255 return true; 1255 return true;
1256 } 1256 }
1257 1257
1258 //------------------------------------------- 1258 //----------------------------------------------------------------------------------------------------------
1259 1259
1260 G4int G4LundStringFragmentation::SampleState( 1260 G4int G4LundStringFragmentation::SampleState(void)
1261 { 1261 {
1262 if ( NumberOf_FS > 349 ) { 1262 if ( NumberOf_FS > 349 ) {
1263 G4ExceptionDescription ed; 1263 G4ExceptionDescription ed;
1264 ed << " NumberOf_FS exceeds its lim 1264 ed << " NumberOf_FS exceeds its limit: NumberOf_FS=" << NumberOf_FS << G4endl;
1265 G4Exception( "G4LundStringFragmenta 1265 G4Exception( "G4LundStringFragmentation::SampleState ", "HAD_LUND_004", JustWarning, ed );
1266 NumberOf_FS = 349; 1266 NumberOf_FS = 349;
1267 } 1267 }
1268 1268
1269 G4double SumWeights=0.; 1269 G4double SumWeights=0.;
1270 for (G4int i=0; i<NumberOf_FS; i++) {SumWei 1270 for (G4int i=0; i<NumberOf_FS; i++) {SumWeights+=FS_Weight[i];}
1271 1271
1272 G4double ksi=G4UniformRand(); 1272 G4double ksi=G4UniformRand();
1273 G4double Sum=0.; 1273 G4double Sum=0.;
1274 G4int indexPosition = 0; 1274 G4int indexPosition = 0;
1275 1275
1276 for (G4int i=0; i<NumberOf_FS; i++) 1276 for (G4int i=0; i<NumberOf_FS; i++)
1277 { 1277 {
1278 Sum+=(FS_Weight[i]/SumWeights); 1278 Sum+=(FS_Weight[i]/SumWeights);
1279 indexPosition=i; 1279 indexPosition=i;
1280 if (Sum >= ksi) break; 1280 if (Sum >= ksi) break;
1281 } 1281 }
1282 return indexPosition; 1282 return indexPosition;
1283 } 1283 }
1284 1284
1285 //------------------------------------------- 1285 //----------------------------------------------------------------------------------------------------------
1286 1286
1287 void G4LundStringFragmentation::Sample4Moment 1287 void G4LundStringFragmentation::Sample4Momentum(G4LorentzVector* Mom, G4double Mass,
1288 1288 G4LorentzVector* AntiMom, G4double AntiMass,
1289 1289 G4double InitialMass)
1290 { 1290 {
1291 // ------ Sampling of momenta of 2 last pro 1291 // ------ Sampling of momenta of 2 last produced hadrons --------------------
1292 G4ThreeVector Pt; 1292 G4ThreeVector Pt;
1293 G4double MassMt, AntiMassMt; 1293 G4double MassMt, AntiMassMt;
1294 G4double AvailablePz, AvailablePz2; 1294 G4double AvailablePz, AvailablePz2;
1295 #ifdef debug_LUNDfragmentation 1295 #ifdef debug_LUNDfragmentation
1296 G4cout<<"Sampling of momenta of 2 las 1296 G4cout<<"Sampling of momenta of 2 last produced hadrons ----------------"<<G4endl;
1297 G4cout<<"Init Mass "<<InitialMass<<" 1297 G4cout<<"Init Mass "<<InitialMass<<" FirstM "<<Mass<<" SecondM "<<AntiMass<<" ProbIsotropy "<<G4endl;
1298 #endif 1298 #endif
1299 1299
1300 G4double r_val = sqr(InitialMass*InitialMas 1300 G4double r_val = sqr(InitialMass*InitialMass - Mass*Mass - AntiMass*AntiMass) -
1301 sqr(2.*Mass*AntiMass); 1301 sqr(2.*Mass*AntiMass);
1302 G4double Pabs = (r_val > 0.)? std::sqrt(r_v 1302 G4double Pabs = (r_val > 0.)? std::sqrt(r_val)/(2.*InitialMass) : 0;
1303 1303
1304 const G4int maxNumberOfLoops = 1000; 1304 const G4int maxNumberOfLoops = 1000;
1305 G4double SigmaQTw = SigmaQT; 1305 G4double SigmaQTw = SigmaQT;
1306 if ( Mass > 930. || AntiMass > 930. ) { 1306 if ( Mass > 930. || AntiMass > 930. ) {
1307 SigmaQT *= ( 1.0 - 0.55*sqr( (Mass+AntiMa 1307 SigmaQT *= ( 1.0 - 0.55*sqr( (Mass+AntiMass)/InitialMass ) );
1308 } 1308 }
1309 if ( Mass < 930. && AntiMass < 930. ) 1309 if ( Mass < 930. && AntiMass < 930. ) {} // q-qbar string
1310 if ( ( Mass < 930. && AntiMass > 930. 1310 if ( ( Mass < 930. && AntiMass > 930. ) ||
1311 ( Mass > 930. && AntiMass < 930. ) ) { 1311 ( Mass > 930. && AntiMass < 930. ) ) { // q-di_q string
1312 //SigmaQT = -1.; // isotropical de 1312 //SigmaQT = -1.; // isotropical decay
1313 } 1313 }
1314 if ( Mass > 930. && AntiMass > 930. ) 1314 if ( Mass > 930. && AntiMass > 930. ) { // qq-qqbar string
1315 SigmaQT *= ( 1.0 - 0.55*sqr( (Mass+ 1315 SigmaQT *= ( 1.0 - 0.55*sqr( (Mass+AntiMass)/InitialMass ) );
1316 } 1316 }
1317 1317
1318 G4int loopCounter = 0; 1318 G4int loopCounter = 0;
1319 do 1319 do
1320 { 1320 {
1321 Pt=SampleQuarkPt(Pabs); Pt.setZ(0); G4dou 1321 Pt=SampleQuarkPt(Pabs); Pt.setZ(0); G4double Pt2=Pt.mag2();
1322 MassMt = std::sqrt( Mass * Mass 1322 MassMt = std::sqrt( Mass * Mass + Pt2);
1323 AntiMassMt= std::sqrt(AntiMass * AntiMass 1323 AntiMassMt= std::sqrt(AntiMass * AntiMass + Pt2);
1324 } 1324 }
1325 while ( (InitialMass < MassMt + AntiMassMt) 1325 while ( (InitialMass < MassMt + AntiMassMt) && ++loopCounter < maxNumberOfLoops );
1326 1326
1327 SigmaQT = SigmaQTw; 1327 SigmaQT = SigmaQTw;
1328 1328
>> 1329 if ( loopCounter >= maxNumberOfLoops ) {
>> 1330 AvailablePz2 = 0.0;
>> 1331 }
>> 1332
1329 AvailablePz2= sqr(InitialMass*InitialMass - 1333 AvailablePz2= sqr(InitialMass*InitialMass - sqr(MassMt) - sqr(AntiMassMt)) -
1330 4.*sqr(MassMt*AntiMassMt); 1334 4.*sqr(MassMt*AntiMassMt);
1331 1335
1332 AvailablePz2 /=(4.*InitialMass*InitialMass) 1336 AvailablePz2 /=(4.*InitialMass*InitialMass);
1333 AvailablePz = std::sqrt(AvailablePz2); 1337 AvailablePz = std::sqrt(AvailablePz2);
1334 1338
1335 G4double Px=Pt.getX(); 1339 G4double Px=Pt.getX();
1336 G4double Py=Pt.getY(); 1340 G4double Py=Pt.getY();
1337 1341
1338 Mom->setPx(Px); Mom->setPy(Py); Mom->setPz( 1342 Mom->setPx(Px); Mom->setPy(Py); Mom->setPz(AvailablePz);
1339 Mom->setE(std::sqrt(sqr(MassMt)+AvailablePz 1343 Mom->setE(std::sqrt(sqr(MassMt)+AvailablePz2));
1340 1344
1341 AntiMom->setPx(-Px); AntiMom->setPy(-Py); A 1345 AntiMom->setPx(-Px); AntiMom->setPy(-Py); AntiMom->setPz(-AvailablePz);
1342 AntiMom->setE (std::sqrt(sqr(AntiMassMt)+Av 1346 AntiMom->setE (std::sqrt(sqr(AntiMassMt)+AvailablePz2));
1343 1347
1344 #ifdef debug_LUNDfragmentation 1348 #ifdef debug_LUNDfragmentation
1345 G4cout<<"Fmass Mom "<<Mom->getX()<<" 1349 G4cout<<"Fmass Mom "<<Mom->getX()<<" "<<Mom->getY()<<" "<<Mom->getZ()<<" "<<Mom->getT()<<G4endl;
1346 G4cout<<"Smass Mom "<<AntiMom->getX() 1350 G4cout<<"Smass Mom "<<AntiMom->getX()<<" "<<AntiMom->getY()<<" "<<AntiMom->getZ()
1347 <<" "<<AntiMom->getT()<<G4endl; 1351 <<" "<<AntiMom->getT()<<G4endl;
1348 #endif 1352 #endif
1349 } 1353 }
1350 1354
1351 //------------------------------------------- 1355 //------------------------------------------------------------------------
1352 1356
1353 G4double G4LundStringFragmentation::lambda(G4 1357 G4double G4LundStringFragmentation::lambda(G4double S, G4double m1_Sqr, G4double m2_Sqr)
1354 { 1358 {
1355 G4double lam = sqr(S - m1_Sqr - m2_Sqr) - 4 1359 G4double lam = sqr(S - m1_Sqr - m2_Sqr) - 4.*m1_Sqr*m2_Sqr;
1356 return lam; 1360 return lam;
1357 } 1361 }
1358 1362
1359 // ------------------------------------------ 1363 // --------------------------------------------------------------
1360 G4LundStringFragmentation::~G4LundStringFragm 1364 G4LundStringFragmentation::~G4LundStringFragmentation()
1361 {} 1365 {}
1362 1366
1363 1367