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26 // 26 //
>> 27 // $Id: G4VLongitudinalStringDecay.cc,v 1.13.2.1 2009/08/11 13:05:47 gcosmo Exp $
>> 28 // GEANT4 tag $Name: geant4-09-02-patch-03 $
27 // 29 //
28 // ------------------------------------------- 30 // -----------------------------------------------------------------------------
29 // GEANT 4 class implementation file 31 // GEANT 4 class implementation file
30 // 32 //
31 // History: first implementation, Maxim K 33 // History: first implementation, Maxim Komogorov, 1-Jul-1998
32 // redesign Gunter Folger, Augu 34 // redesign Gunter Folger, August/September 2001
33 // ------------------------------------------- 35 // -----------------------------------------------------------------------------
34 #include "G4VLongitudinalStringDecay.hh" <<
35 #include "G4PhysicalConstants.hh" <<
36 #include "G4SystemOfUnits.hh" <<
37 #include "G4ios.hh" 36 #include "G4ios.hh"
38 #include "Randomize.hh" 37 #include "Randomize.hh"
>> 38 #include "G4VLongitudinalStringDecay.hh"
39 #include "G4FragmentingString.hh" 39 #include "G4FragmentingString.hh"
40 40
41 #include "G4ParticleDefinition.hh" 41 #include "G4ParticleDefinition.hh"
42 #include "G4ParticleTypes.hh" 42 #include "G4ParticleTypes.hh"
43 #include "G4ParticleChange.hh" 43 #include "G4ParticleChange.hh"
44 #include "G4VShortLivedParticle.hh" 44 #include "G4VShortLivedParticle.hh"
45 #include "G4ShortLivedConstructor.hh" 45 #include "G4ShortLivedConstructor.hh"
46 #include "G4ParticleTable.hh" 46 #include "G4ParticleTable.hh"
>> 47 #include "G4ShortLivedTable.hh"
47 #include "G4PhaseSpaceDecayChannel.hh" 48 #include "G4PhaseSpaceDecayChannel.hh"
48 #include "G4VDecayChannel.hh" 49 #include "G4VDecayChannel.hh"
49 #include "G4DecayTable.hh" 50 #include "G4DecayTable.hh"
50 51
51 #include "G4DiQuarks.hh" 52 #include "G4DiQuarks.hh"
52 #include "G4Quarks.hh" 53 #include "G4Quarks.hh"
53 #include "G4Gluons.hh" 54 #include "G4Gluons.hh"
54 55
55 #include "G4Exp.hh" <<
56 #include "G4Log.hh" <<
57 <<
58 #include "G4HadronicException.hh" <<
59 <<
60 //------------------------debug switches 56 //------------------------debug switches
61 //#define debug_VStringDecay << 57 //#define DEBUG_LightFragmentationTest 1
62 //#define debug_heavyHadrons <<
63 58
64 //******************************************** << 59
>> 60 //********************************************************************************
65 // Constructors 61 // Constructors
66 62
67 G4VLongitudinalStringDecay::G4VLongitudinalStr << 63 G4VLongitudinalStringDecay::G4VLongitudinalStringDecay()
68 : G4HadronicInteraction(name), ProbCCbar(0.0 <<
69 { 64 {
70 MassCut = 210.0*MeV; // Mpi + Delta << 65 MassCut = 0.35*GeV;
>> 66 ClusterMass = 0.15*GeV;
71 67
72 StringLoopInterrupt = 1000; << 68 SmoothParam = 0.9;
73 ClusterLoopInterrupt = 500; << 69 StringLoopInterrupt = 1000;
>> 70 ClusterLoopInterrupt = 500;
74 71
75 // Changable Parameters below. << 72 // Changable Parameters below.
76 SigmaQT = 0.5 * GeV; <<
77 73
78 StrangeSuppress = 0.44; // =0.27/2.27 s << 74 SigmaQT = 0.5 * GeV;
79 DiquarkSuppress = 0.07; // Probability <<
80 DiquarkBreakProb = 0.1; // Probability <<
81 75
82 //... pspin_meson is probability to create << 76 StrangeSuppress = 0.44; // 27 % strange quarks produced, ie. u:d:s=1:1:0.27
83 pspin_meson.resize(3); << 77 DiquarkSuppress = 0.07;
84 pspin_meson[0] = 0.5; // u or d + anti-u o << 78 DiquarkBreakProb = 0.1;
85 pspin_meson[1] = 0.4; // one of the quark <<
86 pspin_meson[2] = 0.3; // both of the quark <<
87 79
88 //... pspin_barion is probability to create << 80 //... pspin_meson is probability to create vector meson
>> 81 pspin_meson = 0.5;
>> 82
>> 83 //... pspin_barion is probability to create 3/2 barion
89 pspin_barion = 0.5; 84 pspin_barion = 0.5;
90 85
91 //... vectorMesonMix[] is quark mixing para 86 //... vectorMesonMix[] is quark mixing parameters for vector mesons (Variable spin = 3)
92 vectorMesonMix.resize(6); 87 vectorMesonMix.resize(6);
93 vectorMesonMix[0] = 0.0; << 88 vectorMesonMix[0] = 0.5;
94 vectorMesonMix[1] = 0.5; << 89 vectorMesonMix[1] = 0.0;
95 vectorMesonMix[2] = 0.0; << 90 vectorMesonMix[2] = 0.5;
96 vectorMesonMix[3] = 0.5; << 91 vectorMesonMix[3] = 0.0;
97 vectorMesonMix[4] = 1.0; 92 vectorMesonMix[4] = 1.0;
98 vectorMesonMix[5] = 1.0; << 93 vectorMesonMix[5] = 1.0;
99 94
100 //... scalarMesonMix[] is quark mixing para 95 //... scalarMesonMix[] is quark mixing parameters for scalar mesons (Variable spin=1)
101 scalarMesonMix.resize(6); 96 scalarMesonMix.resize(6);
102 scalarMesonMix[0] = 0.5; << 97 scalarMesonMix[0] = 0.5;
103 scalarMesonMix[1] = 0.25; << 98 scalarMesonMix[1] = 0.25;
104 scalarMesonMix[2] = 0.5; << 99 scalarMesonMix[2] = 0.5;
105 scalarMesonMix[3] = 0.25; << 100 scalarMesonMix[3] = 0.25;
106 scalarMesonMix[4] = 1.0; << 101 scalarMesonMix[4] = 1.0;
107 scalarMesonMix[5] = 0.5; << 102 scalarMesonMix[5] = 0.5;
108 <<
109 SetProbCCbar(0.0); // Probability of CCbar <<
110 SetProbEta_c(0.1); // Mixing of Eta_c and <<
111 SetProbBBbar(0.0); // Probability of BBbar <<
112 SetProbEta_b(0.0); // Mixing of Eta_b and <<
113 103
114 // Parameters may be changed until the firs << 104 // Parameters may be changed until the first fragmentation starts
115 PastInitPhase=false; 105 PastInitPhase=false;
116 hadronizer = new G4HadronBuilder( pspin_mes << 106 hadronizer = new G4HadronBuilder(pspin_meson,pspin_barion,
117 ProbEta_c << 107 scalarMesonMix,vectorMesonMix);
118 << 108 Kappa = 1.0 * GeV/fermi;
119 MaxMass=-350.0*GeV; // If there will be a <<
120 109
121 SetMinMasses(); // Re-calculation of minim <<
122 110
123 Kappa = 1.0 * GeV/fermi; <<
124 DecayQuark = NewQuark = 0; <<
125 } 111 }
>> 112
126 113
127 G4VLongitudinalStringDecay::~G4VLongitudinalSt 114 G4VLongitudinalStringDecay::~G4VLongitudinalStringDecay()
128 { << 115 {
129 delete hadronizer; 116 delete hadronizer;
130 } << 117 }
131 <<
132 G4HadFinalState* <<
133 G4VLongitudinalStringDecay::ApplyYourself(cons <<
134 { <<
135 return nullptr; <<
136 } <<
137 118
138 //============================================ 119 //=============================================================================
139 120
>> 121 // Operators
>> 122
>> 123 //const & G4VLongitudinalStringDecay::operator=(const G4VLongitudinalStringDecay &)
>> 124 // {
>> 125 // }
>> 126
>> 127 //-----------------------------------------------------------------------------
>> 128
>> 129 int G4VLongitudinalStringDecay::operator==(const G4VLongitudinalStringDecay &) const
>> 130 {
>> 131 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::operator== forbidden");
>> 132 return false;
>> 133 }
>> 134
>> 135 //-------------------------------------------------------------------------------------
>> 136
>> 137 int G4VLongitudinalStringDecay::operator!=(const G4VLongitudinalStringDecay &) const
>> 138 {
>> 139 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::operator!= forbidden");
>> 140 return true;
>> 141 }
>> 142
>> 143 //***********************************************************************************
>> 144
140 // For changing Mass Cut used for selection of 145 // For changing Mass Cut used for selection of very small mass strings
141 void G4VLongitudinalStringDecay::SetMassCut(G4 << 146 void G4VLongitudinalStringDecay::SetMassCut(G4double aValue){MassCut=aValue;}
142 G4double G4VLongitudinalStringDecay::GetMassCu <<
143 147
144 //-------------------------------------------- 148 //-----------------------------------------------------------------------------
145 149
146 // For handling a string with very low mass 150 // For handling a string with very low mass
147 151
148 G4KineticTrackVector* G4VLongitudinalStringDec << 152 G4KineticTrackVector* G4VLongitudinalStringDecay::LightFragmentationTest(const
>> 153 G4ExcitedString * const string)
149 { 154 {
150 G4KineticTrackVector* result = nullptr << 155 // Check string decay threshold
151 pDefPair hadrons( nullptr, nullptr ); << 156
152 G4FragmentingString aString( *string ) << 157 G4KineticTrackVector * result=0; // return 0 when string exceeds the mass cut
153 << 158
154 #ifdef debug_VStringDecay << 159 pDefPair hadrons((G4ParticleDefinition *)0,(G4ParticleDefinition *)0);
155 G4cout<<"G4VLongitudinalStringDecay::P <<
156 <<aString.Mass()<<" MassCut "<<M <<
157 #endif <<
158 <<
159 SetMinimalStringMass( &aString ); <<
160 PossibleHadronMass( &aString, 0, &hadr <<
161 result = new G4KineticTrackVector; <<
162 if ( hadrons.first != nullptr ) { <<
163 if ( hadrons.second == nullptr ) { <<
164 // Substitute string by light h <<
165 <<
166 #ifdef debug_VStringDecay <<
167 G4cout << "VlongSD Warning repl <<
168 G4cout << hadrons.first->GetPar <<
169 << "string .. " << strin <<
170 << string->Get4Momentum( <<
171 #endif <<
172 <<
173 G4ThreeVector Mom3 = string-> <<
174 G4LorentzVector Mom( Mom3, std: <<
175 result->push_back( new G4Kineti <<
176 } else { <<
177 //... string was qq--qqbar type <<
178 <<
179 #ifdef debug_VStringDecay <<
180 G4cout << "VlongSD Warning repl <<
181 << hadrons.first->GetPar <<
182 << hadrons.second->GetPa <<
183 << "string .. " << strin <<
184 << string->Get4Momentum( <<
185 #endif <<
186 <<
187 G4LorentzVector Mom1, Mom2; <<
188 Sample4Momentum( &Mom1, hadrons <<
189 &Mom2, hadrons <<
190 string->Get4Mo <<
191 160
192 result->push_back( new G4Kineti << 161 G4FragmentingString aString(*string);
193 result->push_back( new G4Kineti << 162
>> 163 if ( sqr(FragmentationMass(&aString,0,&hadrons)+MassCut) < aString.Mass2()) {
>> 164 return 0;
>> 165 }
>> 166
>> 167 // The string mass is very low ---------------------------
>> 168
>> 169 result=new G4KineticTrackVector;
>> 170
>> 171 if ( hadrons.second ==0 )
>> 172 {
>> 173 // Substitute string by light hadron, Note that Energy is not conserved here!
>> 174
>> 175 /*
>> 176 #ifdef DEBUG_LightFragmentationTest
>> 177 G4cout << "VlongSF Warning replacing string by single hadron " <<G4endl;
>> 178 G4cout << hadrons.first->GetParticleName()
>> 179 << "string .. " << string->Get4Momentum() << " "
>> 180 << string->Get4Momentum().m() << G4endl;
>> 181 #endif
>> 182 G4cout << "VlongSF Warning replacing string by single hadron " <<G4endl;
>> 183 G4cout << hadrons.first->GetParticleName() << " string .. " <<G4endl;
>> 184 G4cout << string->Get4Momentum() << " " << string->Get4Momentum().m() << G4endl;
>> 185 */
>> 186 G4ThreeVector Mom3 = string->Get4Momentum().vect();
>> 187 G4LorentzVector Mom(Mom3,
>> 188 std::sqrt(Mom3.mag2() +
>> 189 sqr(hadrons.first->GetPDGMass())));
>> 190 result->push_back(new G4KineticTrack(hadrons.first, 0,
>> 191 string->GetPosition(),
>> 192 Mom));
>> 193 } else
>> 194 {
>> 195 //... string was qq--qqbar type: Build two stable hadrons,
>> 196
>> 197 #ifdef DEBUG_LightFragmentationTest
>> 198 G4cout << "VlongSF Warning replacing qq-qqbar string by TWO hadrons "
>> 199 << hadrons.first->GetParticleName() << " / "
>> 200 << hadrons.second->GetParticleName()
>> 201 << "string .. " << string->Get4Momentum() << " "
>> 202 << string->Get4Momentum().m() << G4endl;
>> 203 #endif
>> 204
>> 205 // Uzhi Formation time in the case???
>> 206
>> 207 G4LorentzVector Mom1, Mom2;
>> 208 Sample4Momentum(&Mom1, hadrons.first->GetPDGMass(),
>> 209 &Mom2,hadrons.second->GetPDGMass(),
>> 210 string->Get4Momentum().mag());
>> 211
>> 212 result->push_back(new G4KineticTrack(hadrons.first, 0,
>> 213 string->GetPosition(),
>> 214 Mom1));
>> 215 result->push_back(new G4KineticTrack(hadrons.second, 0,
>> 216 string->GetPosition(),
>> 217 Mom2));
194 218
195 G4ThreeVector Velocity = string 219 G4ThreeVector Velocity = string->Get4Momentum().boostVector();
196 result->Boost(Velocity); 220 result->Boost(Velocity);
197 } << 221 }
198 } << 222
199 return result; << 223 return result;
>> 224
200 } 225 }
201 226
202 //-------------------------------------------- 227 //----------------------------------------------------------------------------------------
203 228
204 G4double G4VLongitudinalStringDecay::PossibleH << 229 G4double G4VLongitudinalStringDecay::FragmentationMass(
205 << 230 const G4FragmentingString * const string,
>> 231 Pcreate build, pDefPair * pdefs )
206 { 232 {
207 G4double mass = 0.0; << 233
>> 234 G4double mass;
>> 235 static G4bool NeedInit(true);
>> 236 static std::vector<double> nomix;
>> 237 static G4HadronBuilder * minMassHadronizer;
>> 238 if ( NeedInit )
>> 239 {
>> 240 NeedInit = false;
>> 241 nomix.resize(6);
>> 242 for ( G4int i=0; i<6 ; i++ ) nomix[i]=0;
>> 243
>> 244 // minMassHadronizer=new G4HadronBuilder(pspin_meson,pspin_barion,nomix,nomix);
>> 245 minMassHadronizer=hadronizer;
>> 246 }
208 247
209 if ( build==0 ) build=&G4HadronBuilder::Buil 248 if ( build==0 ) build=&G4HadronBuilder::BuildLowSpin;
210 249
211 G4ParticleDefinition* Hadron1 = nullpt << 250 G4ParticleDefinition *Hadron1, *Hadron2=0;
212 G4ParticleDefinition* Hadron2 = nullptr; <<
213 251
214 if (!string->IsAFourQuarkString() ) << 252 if (!string->FourQuarkString() )
215 { 253 {
216 // spin 0 meson or spin 1/2 barion 254 // spin 0 meson or spin 1/2 barion will be built
217 255
218 Hadron1 = (hadronizer->*build)(stri << 256 Hadron1 = (minMassHadronizer->*build)(string->GetLeftParton(),
219 #ifdef debug_VStringDecay << 257 string->GetRightParton());
220 G4cout<<"VlongSD PossibleHadronMass"<<G4e << 258 mass= (Hadron1)->GetPDGMass();
221 G4cout<<"VlongSD Quarks at the stri <<
222 <<" "<<string->GetRightParton <<
223 if ( Hadron1 != nullptr) { <<
224 G4cout<<"(G4VLongitudinalStringDe <<
225 <<" "<<Hadron1->GetPDGMass( <<
226 } <<
227 #endif <<
228 if ( Hadron1 != nullptr) { mass = ( <<
229 else { mass = MaxM <<
230 } else 259 } else
231 { 260 {
232 //... string is qq--qqbar: Build tw 261 //... string is qq--qqbar: Build two stable hadrons,
233 << 262 //... with extra uubar or ddbar quark pair
234 #ifdef debug_VStringDecay << 263 G4int iflc = (G4UniformRand() < 0.5)? 1 : 2;
235 G4cout<<"VlongSD PossibleHadronMass << 264 if (string->GetLeftParton()->GetPDGEncoding() < 0) iflc = -iflc;
236 G4cout<<"VlongSD string is qq--qqba << 265
237 #endif << 266 //... theSpin = 4; spin 3/2 baryons will be built
238 << 267 Hadron1 = (minMassHadronizer->*build)(string->GetLeftParton(),
239 G4double StringMass = string->Mas << 268 FindParticle(iflc) );
240 G4int cClusterInterrupt = 0; << 269 Hadron2 = (minMassHadronizer->*build)(string->GetRightParton(),
241 do << 270 FindParticle(-iflc) );
242 { << 271 mass = (Hadron1)->GetPDGMass() + (Hadron2)->GetPDGMass();
243 if (cClusterInterrupt++ >= Cluste <<
244 <<
245 G4int LeftQuark1= string->GetLeft <<
246 G4int LeftQuark2=(string->GetLeft <<
247 <<
248 G4int RightQuark1= string->GetRig <<
249 G4int RightQuark2=(string->GetRig <<
250 <<
251 if (G4UniformRand()<0.5) { <<
252 Hadron1 =hadronizer->Build(Find <<
253 Hadron2 =hadronizer->Build(Find <<
254 } else { <<
255 Hadron1 =hadronizer->Build(Find <<
256 Hadron2 =hadronizer->Build(Find <<
257 } <<
258 //... repeat procedure, if mass o <<
259 //... ClusterMassCut = 0.15*GeV m <<
260 } <<
261 while ( Hadron1 == nullptr || Hadro <<
262 ( StringMass <= Hadron1->Ge <<
263 <<
264 mass = (Hadron1)->GetPDGMass() + (Hadron2 <<
265 } 272 }
266 <<
267 #ifdef debug_VStringDecay <<
268 G4cout<<"VlongSD *Hadrons 1 and 2, pro <<
269 #endif <<
270 273
271 if ( pdefs != 0 ) 274 if ( pdefs != 0 )
272 { // need to return hadrons as well.... 275 { // need to return hadrons as well....
273 pdefs->first = Hadron1; 276 pdefs->first = Hadron1;
274 pdefs->second = Hadron2; 277 pdefs->second = Hadron2;
275 } 278 }
276 279
277 return mass; 280 return mass;
278 } 281 }
279 282
280 //-------------------------------------------- 283 //----------------------------------------------------------------------------
281 284
282 G4ParticleDefinition* G4VLongitudinalStringDec 285 G4ParticleDefinition* G4VLongitudinalStringDecay::FindParticle(G4int Encoding)
283 { << 286 {
284 /* << 287 G4ParticleDefinition* ptr = G4ParticleTable::GetParticleTable()->FindParticle(Encoding);
285 G4cout<<Encoding<<" G4VLongitudinalStringDec << 288 if (ptr == NULL)
286 for (G4int i=4; i<6;i++){ << 289 {
287 for (G4int j=1;j<6;j++){ << 290 G4cout << "Particle with encoding "<<Encoding<<" does not exist!!!"<<G4endl;
288 G4cout<<i<<" "<<j<<" "; << 291 throw G4HadronicException(__FILE__, __LINE__, "Check your particle table");
289 G4int Code = 1000 * i + 100 * j +1; << 292 }
290 G4ParticleDefinition* ptr1 = G4ParticleT << 293 return ptr;
291 Code +=2; << 294 }
292 G4ParticleDefinition* ptr2 = G4ParticleT <<
293 G4cout<<"Code "<<Code - 2<<" ptr "<<ptr1 <<
294 } <<
295 G4cout<<G4endl; <<
296 } <<
297 */ <<
298 <<
299 G4ParticleDefinition* ptr = G4ParticleTable: <<
300 <<
301 if (ptr == nullptr) <<
302 { <<
303 for (size_t i=0; i < NewParticles.size(); <<
304 { <<
305 if ( Encoding == NewParticles[i]->GetPD <<
306 } <<
307 } <<
308 295
309 return ptr; << 296 //-----------------------------------------------------------------------------
310 } << 297 // virtual void Sample4Momentum(G4LorentzVector* Mom, G4double Mass,
>> 298 // G4LorentzVector* AntiMom, G4double AntiMass,
>> 299 // G4double InitialMass)=0;
>> 300 //-----------------------------------------------------------------------------
311 301
312 //******************************************** 302 //*********************************************************************************
313 // For decision on continue or stop string f 303 // For decision on continue or stop string fragmentation
314 // virtual G4bool StopFragmenting(const G4Fr 304 // virtual G4bool StopFragmenting(const G4FragmentingString * const string)=0;
315 // virtual G4bool IsItFragmentable(const G4F << 305 // virtual G4bool IsFragmentable(const G4FragmentingString * const string)=0;
316 // << 306
317 // If a string can not fragment, make last b 307 // If a string can not fragment, make last break into 2 hadrons
318 // virtual G4bool SplitLast(G4FragmentingStr 308 // virtual G4bool SplitLast(G4FragmentingString * string,
319 // G4KineticTrackVe 309 // G4KineticTrackVector * LeftVector,
320 // G4KineticTrackVe 310 // G4KineticTrackVector * RightVector)=0;
321 //-------------------------------------------- 311 //-----------------------------------------------------------------------------
322 // 312 //
323 // If a string can fragment, do the followin << 313 // If a string fragments, do the following
324 // 314 //
325 // For transver of a string to its CMS frame 315 // For transver of a string to its CMS frame
326 //-------------------------------------------- 316 //-----------------------------------------------------------------------------
327 317
328 G4ExcitedString *G4VLongitudinalStringDecay::C << 318 G4ExcitedString *G4VLongitudinalStringDecay::CPExcited(const G4ExcitedString & in)
329 { 319 {
330 G4Parton *Left=new G4Parton(*in.GetLeftParto 320 G4Parton *Left=new G4Parton(*in.GetLeftParton());
331 G4Parton *Right=new G4Parton(*in.GetRightPar 321 G4Parton *Right=new G4Parton(*in.GetRightParton());
332 return new G4ExcitedString(Left,Right,in.Get 322 return new G4ExcitedString(Left,Right,in.GetDirection());
333 } 323 }
334 324
335 //-------------------------------------------- 325 //-----------------------------------------------------------------------------
336 326
337 G4ParticleDefinition * G4VLongitudinalStringDe << 327 G4KineticTrack * G4VLongitudinalStringDecay::Splitup(
338 << 328 G4FragmentingString *string,
339 { << 329 G4FragmentingString *&newString)
340 #ifdef debug_VStringDecay << 330 {
341 G4cout<<"VlongSD QuarkSplitup: quark ID "<< << 331 //G4cout<<"In G4VLong String Dec######################"<<G4endl;
342 #endif << 332
343 << 333 //... random choice of string end to use for creating the hadron (decay)
344 G4int IsParticle=(decay->GetPDGEncoding()>0 << 334 SideOfDecay = (G4UniformRand() < 0.5)? 1: -1;
>> 335 if (SideOfDecay < 0)
>> 336 {
>> 337 string->SetLeftPartonStable();
>> 338 } else
>> 339 {
>> 340 string->SetRightPartonStable();
>> 341 }
>> 342
>> 343 G4ParticleDefinition *newStringEnd;
>> 344 G4ParticleDefinition * HadronDefinition;
>> 345 if (string->DecayIsQuark())
>> 346 {
>> 347 HadronDefinition= QuarkSplitup(string->GetDecayParton(), newStringEnd);
>> 348 } else {
>> 349 HadronDefinition= DiQuarkSplitup(string->GetDecayParton(), newStringEnd);
>> 350 }
>> 351 // create new String from old, ie. keep Left and Right order, but replace decay
>> 352
>> 353 newString=new G4FragmentingString(*string,newStringEnd); // To store possible
>> 354 // quark containt of new string
>> 355 G4LorentzVector* HadronMomentum=SplitEandP(HadronDefinition, string, newString);
345 356
346 pDefPair QuarkPair = CreatePartonPair(IsPar << 357 delete newString; newString=0; // Uzhi 20.06.08
347 created = QuarkPair.second; << 358
>> 359 G4KineticTrack * Hadron =0;
>> 360 if ( HadronMomentum != 0 ) {
>> 361
>> 362 G4ThreeVector Pos;
>> 363 Hadron = new G4KineticTrack(HadronDefinition, 0,Pos, *HadronMomentum);
>> 364
>> 365 newString=new G4FragmentingString(*string,newStringEnd,
>> 366 HadronMomentum);
>> 367
>> 368 //G4cout<<"Out G4VLong String Dec######################"<<G4endl;
>> 369 //G4cout<<"newString 4Mom"<<newString->Get4Momentum()<<G4endl;
>> 370 //G4cout<<"newString Pl "<<newString->LightConePlus()<<G4endl;
>> 371 //G4cout<<"newString Mi "<<newString->LightConeMinus()<<G4endl;
>> 372 //G4cout<<"newString Pts "<<newString->StablePt()<<G4endl;
>> 373 //G4cout<<"newString Ptd "<<newString->DecayPt()<<G4endl;
>> 374 //G4cout<<"newString M2 "<<newString->Mass2()<<G4endl;
>> 375 //G4cout<<"newString M2 "<<newString->Mass()<<G4endl;
>> 376 delete HadronMomentum;
>> 377 }
>> 378 return Hadron;
>> 379 }
348 380
349 DecayQuark = decay->GetPDGEncoding(); << 381 //--------------------------------------------------------------------------------------
350 NewQuark = created->GetPDGEncoding(); <<
351 382
352 #ifdef debug_VStringDecay << 383 G4ParticleDefinition *
353 G4cout<<"VlongSD QuarkSplitup: "<<decay->Ge << 384 G4VLongitudinalStringDecay::QuarkSplitup(G4ParticleDefinition*
354 G4cout<<"hadronizer->Build(QuarkPair.first, << 385 decay, G4ParticleDefinition *&created)
355 #endif << 386 {
>> 387 G4int IsParticle=(decay->GetPDGEncoding()>0) ? -1 : +1; // if we have a quark,
>> 388 // we need antiquark
>> 389 // (or diquark)
>> 390 pDefPair QuarkPair = CreatePartonPair(IsParticle);
>> 391 created = QuarkPair.second;
>> 392 return hadronizer->Build(QuarkPair.first, decay);
>> 393
>> 394 }
>> 395
>> 396 //-----------------------------------------------------------------------------
>> 397
>> 398 G4ParticleDefinition *G4VLongitudinalStringDecay::DiQuarkSplitup(
>> 399 G4ParticleDefinition* decay,
>> 400 G4ParticleDefinition *&created)
>> 401 {
>> 402 //... can Diquark break or not?
>> 403 if (G4UniformRand() < DiquarkBreakProb ){
>> 404 //... Diquark break
>> 405
>> 406 G4int stableQuarkEncoding = decay->GetPDGEncoding()/1000;
>> 407 G4int decayQuarkEncoding = (decay->GetPDGEncoding()/100)%10;
>> 408 if (G4UniformRand() < 0.5)
>> 409 {
>> 410 G4int Swap = stableQuarkEncoding;
>> 411 stableQuarkEncoding = decayQuarkEncoding;
>> 412 decayQuarkEncoding = Swap;
>> 413 }
>> 414
>> 415 G4int IsParticle=(decayQuarkEncoding>0) ? -1 : +1;
>> 416 // if we have a quark, we need antiquark)
>> 417 pDefPair QuarkPair = CreatePartonPair(IsParticle,false); // no diquarks wanted
>> 418 //... Build new Diquark
>> 419 G4int QuarkEncoding=QuarkPair.second->GetPDGEncoding();
>> 420 G4int i10 = std::max(std::abs(QuarkEncoding), std::abs(stableQuarkEncoding));
>> 421 G4int i20 = std::min(std::abs(QuarkEncoding), std::abs(stableQuarkEncoding));
>> 422 G4int spin = (i10 != i20 && G4UniformRand() <= 0.5)? 1 : 3;
>> 423 G4int NewDecayEncoding = -1*IsParticle*(i10 * 1000 + i20 * 100 + spin);
>> 424 created = FindParticle(NewDecayEncoding);
>> 425 G4ParticleDefinition * decayQuark=FindParticle(decayQuarkEncoding);
>> 426 G4ParticleDefinition * had=hadronizer->Build(QuarkPair.first, decayQuark);
>> 427 return had;
>> 428 // return hadronizer->Build(QuarkPair.first, decayQuark);
356 429
357 return hadronizer->Build(QuarkPair.first, d << 430 } else {
>> 431 //... Diquark does not break
>> 432
>> 433 G4int IsParticle=(decay->GetPDGEncoding()>0) ? +1 : -1;
>> 434 // if we have a diquark, we need quark)
>> 435 pDefPair QuarkPair = CreatePartonPair(IsParticle,false); // no diquarks wanted
>> 436 created = QuarkPair.second;
>> 437
>> 438 G4ParticleDefinition * had=hadronizer->Build(QuarkPair.first, decay);
>> 439 return had;
>> 440 // return G4ParticleDefinition * had=hadronizer->Build(QuarkPair.first, decay);
>> 441 }
358 } 442 }
359 443
360 //-------------------------------------------- 444 //-----------------------------------------------------------------------------
361 445
362 G4VLongitudinalStringDecay::pDefPair G4VLongit << 446 G4int G4VLongitudinalStringDecay::SampleQuarkFlavor(void)
363 CreatePartonPair(G4int NeedParticle,G4bool All << 447 {
>> 448 return (1 + (int)(G4UniformRand()/StrangeSuppress));
>> 449 }
>> 450
>> 451 //-----------------------------------------------------------------------------
>> 452
>> 453 G4VLongitudinalStringDecay::pDefPair G4VLongitudinalStringDecay::CreatePartonPair(G4int NeedParticle,G4bool AllowDiquarks)
364 { 454 {
365 // NeedParticle = +1 for Particle, -1 for << 455 // NeedParticle = +1 for Particle, -1 for Antiparticle
>> 456
366 if ( AllowDiquarks && G4UniformRand() < Di 457 if ( AllowDiquarks && G4UniformRand() < DiquarkSuppress )
367 { 458 {
368 // Create a Diquark - AntiDiquark pair , 459 // Create a Diquark - AntiDiquark pair , first in pair is anti to IsParticle
369 #ifdef debug_VStringDecay << 460 G4int q1 = SampleQuarkFlavor();
370 G4cout<<"VlongSD Create a Diquark - Anti << 461 G4int q2 = SampleQuarkFlavor();
371 #endif << 462 G4int spin = (q1 != q2 && G4UniformRand() <= 0.5)? 1 : 3;
372 G4int q1(0), q2(0), spin(0), PDGcode(0); <<
373 <<
374 q1 = SampleQuarkFlavor(); <<
375 q2 = SampleQuarkFlavor(); <<
376 <<
377 spin = (q1 != q2 && G4UniformRand() <= 0 <<
378 // conv 463 // convention: quark with higher PDG number is first
379 PDGcode = (std::max(q1,q2) * 1000 + std: << 464 G4int PDGcode = (std::max(q1,q2) * 1000 + std::min(q1,q2) * 100 + spin) * NeedParticle;
380 <<
381 return pDefPair (FindParticle(-PDGcode), 465 return pDefPair (FindParticle(-PDGcode),FindParticle(PDGcode));
>> 466
382 467
383 } else { 468 } else {
384 // Create a Quark - AntiQuark pair, firs 469 // Create a Quark - AntiQuark pair, first in pair IsParticle
385 #ifdef debug_VStringDecay <<
386 G4cout<<"VlongSD Create a Quark - AntiQu <<
387 #endif <<
388 G4int PDGcode=SampleQuarkFlavor()*NeedPa 470 G4int PDGcode=SampleQuarkFlavor()*NeedParticle;
389 return pDefPair (FindParticle(PDGcode),F 471 return pDefPair (FindParticle(PDGcode),FindParticle(-PDGcode));
390 } 472 }
391 } <<
392 473
393 //-------------------------------------------- <<
394 <<
395 G4int G4VLongitudinalStringDecay::SampleQuarkF <<
396 { <<
397 G4int quark(1); <<
398 G4double ksi = G4UniformRand(); <<
399 if ( ksi < ProbCB ) { <<
400 if ( ksi < ProbCCbar ) {quark = 4;} // <<
401 else {quark = 5;} // <<
402 #ifdef debug_heavyHadrons <<
403 G4cout << "G4VLongitudinalStringDecay::S <<
404 << quark << G4endl; <<
405 #endif <<
406 } else { <<
407 quark = 1 + (int)(G4UniformRand()/Strange <<
408 } <<
409 #ifdef debug_VStringDecay <<
410 G4cout<<"VlongSD SampleQuarkFlavor "<<quark <<
411 <<" "<<ProbCCbar<<" "<<ProbBBbar<<" ) <<
412 #endif <<
413 return quark; <<
414 } 474 }
415 475
416 //-------------------------------------------- 476 //-----------------------------------------------------------------------------
417 477
>> 478 // G4ThreeVector G4VLongitudinalStringDecay::SampleQuarkPt()
>> 479 // {
>> 480 // G4double width_param= 2.0 * GeV*GeV;
>> 481 // G4double R = G4UniformRand();
>> 482 // G4double Pt = std::sqrt(width_param*R/(1-R));
>> 483 // G4double phi = 2.*pi*G4UniformRand();
>> 484 // return G4ThreeVector(Pt * std::cos(phi),Pt * std::sin(phi),0);
>> 485 // }
>> 486
418 G4ThreeVector G4VLongitudinalStringDecay::Samp 487 G4ThreeVector G4VLongitudinalStringDecay::SampleQuarkPt(G4double ptMax)
419 { << 488 {
420 G4double Pt; 489 G4double Pt;
421 if ( ptMax < 0 ) { 490 if ( ptMax < 0 ) {
422 // sample full gaussian 491 // sample full gaussian
423 Pt = -G4Log(G4UniformRand()); << 492 Pt = -std::log(G4UniformRand());
424 } else { 493 } else {
425 // sample in limited range 494 // sample in limited range
426 G4double q = ptMax/SigmaQT; << 495 Pt = -std::log(CLHEP::RandFlat::shoot(exp(-sqr(ptMax)/sqr(SigmaQT)), 1.));
427 G4double ymin = (q > 20.) ? 0.0 : G4Exp( <<
428 Pt = -G4Log(G4RandFlat::shoot(ymin, 1.)) <<
429 } 496 }
430 Pt = SigmaQT * std::sqrt(Pt); 497 Pt = SigmaQT * std::sqrt(Pt);
431 G4double phi = 2.*pi*G4UniformRand(); 498 G4double phi = 2.*pi*G4UniformRand();
432 return G4ThreeVector(Pt * std::cos(phi),Pt 499 return G4ThreeVector(Pt * std::cos(phi),Pt * std::sin(phi),0);
433 } << 500 }
434 501
435 //******************************************** 502 //******************************************************************************
436 503
437 void G4VLongitudinalStringDecay::CalculateHadr << 504 void G4VLongitudinalStringDecay::CalculateHadronTimePosition(G4double theInitialStringMass, G4KineticTrackVector* Hadrons)
438 <<
439 { <<
440 // `yo-yo` formation time <<
441 // const G4double kappa = 1.0 * GeV/fermi <<
442 G4double kappa = GetStringTensionParameter( <<
443 for (size_t c1 = 0; c1 < Hadrons->size(); c <<
444 { 505 {
>> 506
>> 507 // `yo-yo` formation time
>> 508 // const G4double kappa = 1.0 * GeV/fermi/4.; // Uzhi String tension 1.06.08
>> 509 G4double kappa = GetStringTensionParameter();
>> 510 //G4cout<<"Kappa "<<kappa<<G4endl; // Uzhi 20.06.08
>> 511 //G4int Uzhi; G4cin>>Uzhi; // Uzhi 20.06.08
>> 512 for(size_t c1 = 0; c1 < Hadrons->size(); c1++)
>> 513 {
445 G4double SumPz = 0; 514 G4double SumPz = 0;
446 G4double SumE = 0; 515 G4double SumE = 0;
447 for (size_t c2 = 0; c2 < c1; c2++) << 516 for(size_t c2 = 0; c2 < c1; c2++)
448 { << 517 {
449 SumPz += Hadrons->operator[](c2)->Get 518 SumPz += Hadrons->operator[](c2)->Get4Momentum().pz();
450 SumE += Hadrons->operator[](c2)->Get 519 SumE += Hadrons->operator[](c2)->Get4Momentum().e();
451 } << 520 }
452 G4double HadronE = Hadrons->operator[]( 521 G4double HadronE = Hadrons->operator[](c1)->Get4Momentum().e();
453 G4double HadronPz = Hadrons->operator[]( 522 G4double HadronPz = Hadrons->operator[](c1)->Get4Momentum().pz();
454 Hadrons->operator[](c1)->SetFormationTim << 523 Hadrons->operator[](c1)->SetFormationTime((theInitialStringMass - 2.*SumPz + HadronE - HadronPz)/(2.*kappa));
455 (theInitialStringMass - 2.*SumPz + Had << 524 G4ThreeVector aPosition(0, 0, (theInitialStringMass - 2.*SumE - HadronE + HadronPz)/(2.*kappa));
456 G4ThreeVector aPosition( 0, 0, <<
457 (theInitialStringMass - 2.*SumE - Had <<
458 Hadrons->operator[](c1)->SetPosition(aPo 525 Hadrons->operator[](c1)->SetPosition(aPosition);
>> 526 }
459 } 527 }
460 } <<
461 528
462 //-------------------------------------------- 529 //-----------------------------------------------------------------------------
463 530
>> 531 /*
>> 532 void G4VLongitudinalStringDecay::CalculateHadronTimePosition(G4double theInitialStringMass, G4KineticTrackVector* Hadrons)
>> 533 {
>> 534 // 'constituent' formation time
>> 535 const G4double kappa = 1.0 * GeV/fermi;
>> 536 for(G4int c1 = 0; c1 < Hadrons->length(); c1++)
>> 537 {
>> 538 G4double SumPz = 0;
>> 539 G4double SumE = 0;
>> 540 for(G4int c2 = 0; c2 <= c1; c2++)
>> 541 {
>> 542 SumPz += Hadrons->at(c2)->Get4Momentum().pz();
>> 543 SumE += Hadrons->at(c2)->Get4Momentum().e();
>> 544 }
>> 545 Hadrons->at(c1)->SetFormationTime((theInitialStringMass - 2.*SumPz)/(2.*kappa));
>> 546 G4ThreeVector aPosition(0, 0, (theInitialStringMass - 2.*SumE)/(2.*kappa));
>> 547 Hadrons->at(c1)->SetPosition(aPosition);
>> 548 }
>> 549 c1 = Hadrons->length()-1;
>> 550 Hadrons->at(c1)->SetFormationTime(Hadrons->at(c1-1)->GetFormationTime());
>> 551 Hadrons->at(c1)->SetPosition(Hadrons->at(c1-1)->GetPosition());
>> 552 }
>> 553 */
>> 554
>> 555
>> 556 //*****************************************************************************
>> 557
464 void G4VLongitudinalStringDecay::SetSigmaTrans 558 void G4VLongitudinalStringDecay::SetSigmaTransverseMomentum(G4double aValue)
465 { 559 {
466 if ( PastInitPhase ) { << 560 if ( PastInitPhase ) {
467 throw G4HadronicException(__FILE__, __LIN << 561 throw G4HadronicException(__FILE__, __LINE__, "4VLongitudinalStringDecay::SetSigmaTransverseMomentum after FragmentString() not allowed");
468 "G4VLongitudinalStringDecay::SetSigmaTr << 562 } else {
469 } else { << 563 SigmaQT = aValue;
470 SigmaQT = aValue; << 564 }
471 } <<
472 } 565 }
473 566
474 //-------------------------------------------- 567 //----------------------------------------------------------------------------------------------------------
475 568
476 void G4VLongitudinalStringDecay::SetStrangenes 569 void G4VLongitudinalStringDecay::SetStrangenessSuppression(G4double aValue)
477 { 570 {
478 StrangeSuppress = aValue; << 571 if ( PastInitPhase ) {
>> 572 throw G4HadronicException(__FILE__, __LINE__, "4VLongitudinalStringDecay::SetStrangenessSuppression after FragmentString() not allowed");
>> 573 } else {
>> 574 StrangeSuppress = aValue;
>> 575 }
479 } 576 }
480 577
481 //-------------------------------------------- 578 //----------------------------------------------------------------------------------------------------------
482 579
483 void G4VLongitudinalStringDecay::SetDiquarkSup 580 void G4VLongitudinalStringDecay::SetDiquarkSuppression(G4double aValue)
484 { 581 {
485 DiquarkSuppress = aValue; << 582 if ( PastInitPhase ) {
>> 583 throw G4HadronicException(__FILE__, __LINE__, "4VLongitudinalStringDecay::SetDiquarkSuppression after FragmentString() not allowed");
>> 584 } else {
>> 585 DiquarkSuppress = aValue;
>> 586 }
486 } 587 }
487 588
488 //-------------------------------------------- 589 //----------------------------------------------------------------------------------------
489 590
490 void G4VLongitudinalStringDecay::SetDiquarkBre 591 void G4VLongitudinalStringDecay::SetDiquarkBreakProbability(G4double aValue)
491 { 592 {
492 if ( PastInitPhase ) { << 593 if ( PastInitPhase ) {
493 throw G4HadronicException(__FILE__, __LINE << 594 throw G4HadronicException(__FILE__, __LINE__, "4VLongitudinalStringDecay::SetDiquarkBreakProbability after FragmentString() not allowed");
494 "G4VLongitudinalStringDecay::SetDiquarkB << 595 } else {
495 } else { << 596 DiquarkBreakProb = aValue;
496 DiquarkBreakProb = aValue; << 597 }
497 } <<
498 } 598 }
499 599
500 //-------------------------------------------- 600 //----------------------------------------------------------------------------------------------------------
501 601
502 void G4VLongitudinalStringDecay::SetSpinThreeH << 602 void G4VLongitudinalStringDecay::SetVectorMesonProbability(G4double aValue)
503 { 603 {
504 if ( PastInitPhase ) { << 604 if ( PastInitPhase ) {
505 throw G4HadronicException(__FILE__, __LINE << 605 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::SetVectorMesonProbability after FragmentString() not allowed");
506 "G4VLongitudinalStringDecay::SetSpinThre << 606 } else {
507 } else { << 607 pspin_meson = aValue;
508 pspin_barion = aValue; << 608 delete hadronizer;
509 delete hadronizer; << 609 hadronizer = new G4HadronBuilder(pspin_meson,pspin_barion,
510 hadronizer = new G4HadronBuilder( pspin_me << 610 scalarMesonMix,vectorMesonMix);
511 ProbEta_ << 611 }
512 } <<
513 } 612 }
514 613
515 //-------------------------------------------- 614 //----------------------------------------------------------------------------------------------------------
516 615
517 void G4VLongitudinalStringDecay::SetScalarMeso << 616 void G4VLongitudinalStringDecay::SetSpinThreeHalfBarionProbability(G4double aValue)
518 { 617 {
519 if ( PastInitPhase ) { << 618 if ( PastInitPhase ) {
520 throw G4HadronicException(__FILE__, __LINE << 619 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::SetSpinThreeHalfBarionProbability after FragmentString() not allowed");
521 "G4VLongitudinalStringDecay::SetScalarMe << 620 } else {
522 } else { << 621 pspin_barion = aValue;
523 if ( aVector.size() < 6 ) << 622 delete hadronizer;
524 throw G4HadronicException(__FILE__, __LI << 623 hadronizer = new G4HadronBuilder(pspin_meson,pspin_barion,
525 "G4VLongitudinalStringDecay::SetScalar << 624 scalarMesonMix,vectorMesonMix);
526 scalarMesonMix[0] = aVector[0]; << 625 }
527 scalarMesonMix[1] = aVector[1]; <<
528 scalarMesonMix[2] = aVector[2]; <<
529 scalarMesonMix[3] = aVector[3]; <<
530 scalarMesonMix[4] = aVector[4]; <<
531 scalarMesonMix[5] = aVector[5]; <<
532 delete hadronizer; <<
533 hadronizer = new G4HadronBuilder( pspin_me <<
534 ProbEta_ <<
535 } <<
536 } 626 }
537 627
538 //-------------------------------------------- 628 //----------------------------------------------------------------------------------------------------------
539 629
540 void G4VLongitudinalStringDecay::SetVectorMeso << 630 void G4VLongitudinalStringDecay::SetScalarMesonMixings(std::vector<G4double> aVector)
541 { <<
542 if ( PastInitPhase ) { <<
543 throw G4HadronicException(__FILE__, __LINE <<
544 "G4VLongitudinalStringDecay::SetVectorMe <<
545 } else { <<
546 if ( aVector.size() < 6 ) <<
547 throw G4HadronicException(__FILE__, __LI <<
548 "G4VLongitudinalStringDecay::SetVector <<
549 vectorMesonMix[0] = aVector[0]; <<
550 vectorMesonMix[1] = aVector[1]; <<
551 vectorMesonMix[2] = aVector[2]; <<
552 vectorMesonMix[3] = aVector[3]; <<
553 vectorMesonMix[4] = aVector[4]; <<
554 vectorMesonMix[5] = aVector[5]; <<
555 delete hadronizer; <<
556 hadronizer = new G4HadronBuilder( pspin_me <<
557 ProbEta_ <<
558 } <<
559 } <<
560 <<
561 //-------------------------------------------- <<
562 <<
563 void G4VLongitudinalStringDecay::SetProbCCbar( <<
564 { <<
565 ProbCCbar = aValue; <<
566 ProbCB = ProbCCbar + ProbBBbar; <<
567 } <<
568 <<
569 //-------------------------------------------- <<
570 <<
571 void G4VLongitudinalStringDecay::SetProbEta_c( <<
572 { <<
573 ProbEta_c = aValue; <<
574 } <<
575 <<
576 //-------------------------------------------- <<
577 <<
578 void G4VLongitudinalStringDecay::SetProbBBbar( <<
579 { 631 {
580 ProbBBbar = aValue; << 632 if ( PastInitPhase ) {
581 ProbCB = ProbCCbar + ProbBBbar; << 633 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::SetScalarMesonMixings after FragmentString() not allowed");
>> 634 } else {
>> 635 if ( aVector.size() < 6 )
>> 636 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::SetScalarMesonMixings( argument Vector too small");
>> 637 scalarMesonMix[0] = aVector[0];
>> 638 scalarMesonMix[1] = aVector[1];
>> 639 scalarMesonMix[2] = aVector[2];
>> 640 scalarMesonMix[3] = aVector[3];
>> 641 scalarMesonMix[4] = aVector[4];
>> 642 scalarMesonMix[5] = aVector[5];
>> 643 delete hadronizer;
>> 644 hadronizer = new G4HadronBuilder(pspin_meson,pspin_barion,
>> 645 scalarMesonMix,vectorMesonMix);
>> 646 }
582 } 647 }
583 648
584 //-------------------------------------------- << 649 //----------------------------------------------------------------------------------------------------------
585 650
586 void G4VLongitudinalStringDecay::SetProbEta_b( << 651 void G4VLongitudinalStringDecay::SetVectorMesonMixings(std::vector<G4double> aVector)
587 { 652 {
588 ProbEta_b = aValue; << 653 if ( PastInitPhase ) {
>> 654 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::SetVectorMesonMixings after FragmentString() not allowed");
>> 655 } else {
>> 656 if ( aVector.size() < 6 )
>> 657 throw G4HadronicException(__FILE__, __LINE__, "G4VLongitudinalStringDecay::SetVectorMesonMixings( argument Vector too small");
>> 658 vectorMesonMix[0] = aVector[0];
>> 659 vectorMesonMix[1] = aVector[1];
>> 660 vectorMesonMix[2] = aVector[2];
>> 661 vectorMesonMix[3] = aVector[3];
>> 662 vectorMesonMix[4] = aVector[4];
>> 663 vectorMesonMix[5] = aVector[5];
>> 664 delete hadronizer;
>> 665 hadronizer = new G4HadronBuilder(pspin_meson,pspin_barion,
>> 666 scalarMesonMix,vectorMesonMix);
>> 667
>> 668 }
589 } 669 }
590 670
591 //-------------------------------------------- 671 //-------------------------------------------------------------------------------------------
592 << 672 void G4VLongitudinalStringDecay::SetStringTensionParameter(G4double aValue)// Uzhi 20 June 08
593 void G4VLongitudinalStringDecay::SetStringTens <<
594 { 673 {
595 Kappa = aValue * GeV/fermi; << 674 Kappa = aValue * GeV/fermi;
596 } 675 }
597 << 676 //**************************************************************************************
598 //-------------------------------------------- <<
599 <<
600 void G4VLongitudinalStringDecay::SetMinMasses( <<
601 { <<
602 // ------ For estimation of a minimal stri <<
603 Mass_of_light_quark =140.*MeV; <<
604 Mass_of_s_quark =500.*MeV; <<
605 Mass_of_c_quark =1600.*MeV; <<
606 Mass_of_b_quark =4500.*MeV; <<
607 Mass_of_string_junction=720.*MeV; <<
608 <<
609 // ---------------- Determination of minim <<
610 G4ParticleDefinition * hadron1; G4int C <<
611 G4ParticleDefinition * hadron2; G4int C <<
612 for (G4int i=1; i < 6; i++) { <<
613 Code1 = 100*i + 10*1 + 1; <<
614 hadron1 = FindParticle(Code1); <<
615 <<
616 if (hadron1 != nullptr) { <<
617 for (G4int j=1; j < 6; j++) { <<
618 Code2 = 100*j + 10*1 + 1; <<
619 hadron2 = FindParticle(Code2); <<
620 if (hadron2 != nullptr) { <<
621 minMassQQbarStr[i-1][j-1] = h <<
622 } <<
623 } <<
624 } <<
625 } <<
626 <<
627 minMassQQbarStr[1][1] = minMassQQbarStr[0] <<
628 <<
629 // ---------------- Determination of minim <<
630 G4ParticleDefinition * hadron3; <<
631 G4int kfla, kflb; <<
632 // MaxMass = -350.0*GeV; // If there wi <<
633 <<
634 for (G4int i=1; i < 6; i++) { //i=1 <<
635 Code1 = 100*i + 10*1 + 1; <<
636 hadron1 = FindParticle(Code1); <<
637 for (G4int j=1; j < 6; j++) { <<
638 for (G4int k=1; k < 6; k++) { <<
639 kfla = std::max(j,k); <<
640 kflb = std::min(j,k); <<
641 <<
642 // Add d-quark <<
643 Code2 = 1000*kfla + 100*kflb + <<
644 if ( (j == 1) && (k==1)) Code2 = 1000*2 + <<
645 <<
646 hadron2 = G4ParticleTable::Get <<
647 hadron3 = G4ParticleTable::Get <<
648 <<
649 if ((hadron2 == nullptr) && (h <<
650 <<
651 if ((hadron2 != nullptr) && (h <<
652 if (hadron2->GetPDGMass() > <<
653 }; <<
654 <<
655 if ((hadron2 != nullptr) && (h <<
656 <<
657 if ((hadron2 == nullptr) && (h <<
658 <<
659 minMassQDiQStr[i-1][j-1][k-1] <<
660 } <<
661 } <<
662 } <<
663 <<
664 // ------ An estimated minimal string mass <<
665 MinimalStringMass = 0.; <<
666 MinimalStringMass2 = 0.; <<
667 // q charges d u <<
668 Qcharge[0] = -1; Qcharge[1] = 2; Qcharge[2 <<
669 <<
670 // For treating of small string decays <<
671 for (G4int i=0; i<5; i++) <<
672 { for (G4int j=0; j<5; j++) <<
673 { for (G4int k=0; k<7; k++) <<
674 { <<
675 Meson[i][j][k]=0; MesonWeight[i][j <<
676 } <<
677 } <<
678 } <<
679 //-------------------------- <<
680 G4int StrangeQ = 0; <<
681 G4int StrangeAQ = 0; <<
682 for (G4int i=0; i<5; i++) <<
683 { <<
684 if( i >= 2 ) StrangeQ=1; <<
685 for (G4int j=0; j<5; j++) <<
686 { <<
687 StrangeAQ = 0; <<
688 if( j >= 2 ) StrangeAQ=1; <<
689 Meson[i][j][0] = 100 * (std::ma <<
690 MesonWeight[i][j][0] = ( pspin_meso <<
691 Meson[i][j][1] = 100 * (std::ma <<
692 MesonWeight[i][j][1] = (1.-pspin_meso <<
693 } <<
694 } <<
695 <<
696 //qqs <<
697 //dd1 -> scalarMesonMix[0] * 111 + (1-scal <<
698 //dd1 -> Pi0 <<
699 <<
700 Meson[0][0][0] = 111; MesonWeight[0][0][0] <<
701 Meson[0][0][2] = 221; MesonWeight[0][0][3] <<
702 Meson[0][0][3] = 331; MesonWeight[0][0][4] <<
703 <<
704 //dd3 -> (1-vectorMesonMix[1] * 113 + vect <<
705 //dd3 -> rho_0 <<
706 <<
707 Meson[0][0][1] = 113; MesonWeight[0][0][1] <<
708 Meson[0][0][4] = 223; MesonWeight[0][0][4] <<
709 <<
710 //uu1 -> scalarMesonMix[0] * 111 + (1-scal <<
711 //uu1 -> Pi0 <<
712 <<
713 Meson[1][1][0] = 111; MesonWeight[1][1][0] <<
714 Meson[1][1][2] = 221; MesonWeight[1][1][2] <<
715 Meson[1][1][3] = 331; MesonWeight[1][1][3] <<
716 <<
717 //uu3 -> (1-vectorMesonMix[1]) * 113 + vec <<
718 //uu3 -> rho_0 <<
719 <<
720 Meson[1][1][1] = 113; MesonWeight[1][1][1] <<
721 Meson[1][1][4] = 223; MesonWeight[1][1][4] <<
722 <<
723 //ss1 -> <<
724 //ss1 -> <<
725 <<
726 Meson[2][2][0] = 221; MesonWeight[2][2][0] <<
727 Meson[2][2][2] = 331; MesonWeight[2][2][2] <<
728 <<
729 //ss3 -> <<
730 //ss3 -> <<
731 <<
732 Meson[2][2][1] = 333; MesonWeight[2][2][1] <<
733 <<
734 //cc1 -> ProbEta_c /(1-pspin_meson) <<
735 //cc3 -> (1-ProbEta_c)/( pspin_meson) <<
736 <<
737 //bb1 -> ProbEta_b /pspin_meson 551 <<
738 //bb3 -> (1-ProbEta_b)/pspin_meson 553 <<
739 <<
740 if ( pspin_meson[2] != 0. ) { <<
741 Meson[3][3][0] *= ( ProbEta_c)/( p <<
742 Meson[3][3][1] *= (1.0-ProbEta_c)/(1.-p <<
743 <<
744 Meson[4][4][0] *= ( ProbEta_b)/( p <<
745 Meson[4][4][1] *= (1.0-ProbEta_b)/(1.-p <<
746 } <<
747 <<
748 //-------------------------- <<
749 <<
750 for (G4int i=0; i<5; i++) <<
751 { for (G4int j=0; j<5; j++) <<
752 { for (G4int k=0; k<5; k++) <<
753 { for (G4int l=0; l<4; l++) <<
754 { Baryon[i][j][k][l]=0; BaryonWei <<
755 } <<
756 } <<
757 } <<
758 <<
759 kfla =0; kflb =0; <<
760 G4int kflc(0), kfld(0), <<
761 for (G4int i=0; i<5; i++) <<
762 { for (G4int j=0; j<5; j++) <<
763 { for (G4int k=0; k<5; k++) <<
764 { <<
765 kfla = i+1; kflb = j+1; kflc = k+1; <<
766 kfld = std::max(kfla,kflb); <<
767 kfld = std::max(kfld,kflc); <<
768 <<
769 kflf = std::min(kfla,kflb); <<
770 kflf = std::min(kflf,kflc); <<
771 <<
772 kfle = kfla + kflb + kflc - kfld - <<
773 <<
774 Baryon[i][j][k][0] = 1000 * k <<
775 BaryonWeight[i][j][k][0] = ( pspi <<
776 Baryon[i][j][k][1] = 1000 * k <<
777 BaryonWeight[i][j][k][1] = (1.-pspi <<
778 } <<
779 } <<
780 } <<
781 <<
782 // Delta- ddd - only 1114 <<
783 Baryon[0][0][0][0] = 1114; BaryonWeight <<
784 Baryon[0][0][0][1] = 0; BaryonWeight <<
785 <<
786 // Delta++ uuu - only 2224 <<
787 Baryon[1][1][1][0] = 2224; BaryonWeight <<
788 Baryon[1][1][1][1] = 0; BaryonWeight <<
789 <<
790 // Omega- sss - only 3334 <<
791 Baryon[2][2][2][0] = 3334; BaryonWeight <<
792 Baryon[2][2][2][1] = 0; BaryonWeight <<
793 <<
794 // Omega_cc++ ccc - only 4444 <<
795 Baryon[3][3][3][0] = 4444; BaryonWeight <<
796 Baryon[3][3][3][1] = 0; BaryonWeight <<
797 <<
798 // Omega_bb- bbb - only 5554 <<
799 Baryon[4][4][4][0] = 5554; BaryonWeight <<
800 Baryon[4][4][4][1] = 0; BaryonWeight <<
801 <<
802 // Lambda/Sigma0 sud - 3122/3212 <<
803 Baryon[0][1][2][0] = 3122; BaryonWeight <<
804 Baryon[0][2][1][0] = 3122; BaryonWeight <<
805 Baryon[1][0][2][0] = 3122; BaryonWeight <<
806 Baryon[1][2][0][0] = 3122; BaryonWeight <<
807 Baryon[2][0][1][0] = 3122; BaryonWeight <<
808 Baryon[2][1][0][0] = 3122; BaryonWeight <<
809 <<
810 Baryon[0][1][2][2] = 3212; BaryonWeight <<
811 Baryon[0][2][1][2] = 3212; BaryonWeight <<
812 Baryon[1][0][2][2] = 3212; BaryonWeight <<
813 Baryon[1][2][0][2] = 3212; BaryonWeight <<
814 Baryon[2][0][1][2] = 3212; BaryonWeight <<
815 Baryon[2][1][0][2] = 3212; BaryonWeight <<
816 <<
817 // Lambda_c+/Sigma_c+ cud - 4122/4212 <<
818 Baryon[0][1][3][0] = 4122; BaryonWeight <<
819 Baryon[0][3][1][0] = 4122; BaryonWeight <<
820 Baryon[1][0][3][0] = 4122; BaryonWeight <<
821 Baryon[1][3][0][0] = 4122; BaryonWeight <<
822 Baryon[3][0][1][0] = 4122; BaryonWeight <<
823 Baryon[3][1][0][0] = 4122; BaryonWeight <<
824 <<
825 Baryon[0][1][3][2] = 4212; BaryonWeight <<
826 Baryon[0][3][1][2] = 4212; BaryonWeight <<
827 Baryon[1][0][3][2] = 4212; BaryonWeight <<
828 Baryon[1][3][0][2] = 4212; BaryonWeight <<
829 Baryon[3][0][1][2] = 4212; BaryonWeight <<
830 Baryon[3][1][0][2] = 4212; BaryonWeight <<
831 <<
832 // Xi_c+/Xi_c+' cus - 4232/4322 <<
833 Baryon[1][2][3][0] = 4232; BaryonWeight <<
834 Baryon[1][3][2][0] = 4232; BaryonWeight <<
835 Baryon[2][1][3][0] = 4232; BaryonWeight <<
836 Baryon[2][3][1][0] = 4232; BaryonWeight <<
837 Baryon[3][1][2][0] = 4232; BaryonWeight <<
838 Baryon[3][2][1][0] = 4232; BaryonWeight <<
839 <<
840 Baryon[1][2][3][2] = 4322; BaryonWeight <<
841 Baryon[1][3][2][2] = 4322; BaryonWeight <<
842 Baryon[2][1][3][2] = 4322; BaryonWeight <<
843 Baryon[2][3][1][2] = 4322; BaryonWeight <<
844 Baryon[3][1][2][2] = 4322; BaryonWeight <<
845 Baryon[3][2][1][2] = 4322; BaryonWeight <<
846 <<
847 // Xi_c0/Xi_c0' cus - 4132/4312 <<
848 Baryon[0][2][3][0] = 4132; BaryonWeight <<
849 Baryon[0][3][2][0] = 4132; BaryonWeight <<
850 Baryon[2][0][3][0] = 4132; BaryonWeight <<
851 Baryon[2][3][0][0] = 4132; BaryonWeight <<
852 Baryon[3][0][2][0] = 4132; BaryonWeight <<
853 Baryon[3][2][0][0] = 4132; BaryonWeight <<
854 <<
855 Baryon[0][2][3][2] = 4312; BaryonWeight <<
856 Baryon[0][3][2][2] = 4312; BaryonWeight <<
857 Baryon[2][0][3][2] = 4312; BaryonWeight <<
858 Baryon[2][3][0][2] = 4312; BaryonWeight <<
859 Baryon[3][0][2][2] = 4312; BaryonWeight <<
860 Baryon[3][2][0][2] = 4312; BaryonWeight <<
861 <<
862 // Lambda_b0/Sigma_b0 bud - 5122/5212 <<
863 Baryon[0][1][4][0] = 5122; BaryonWeight <<
864 Baryon[0][4][1][0] = 5122; BaryonWeight <<
865 Baryon[1][0][4][0] = 5122; BaryonWeight <<
866 Baryon[1][4][0][0] = 5122; BaryonWeight <<
867 Baryon[4][0][1][0] = 5122; BaryonWeight <<
868 Baryon[4][1][0][0] = 5122; BaryonWeight <<
869 <<
870 Baryon[0][1][4][2] = 5212; BaryonWeight <<
871 Baryon[0][4][1][2] = 5212; BaryonWeight <<
872 Baryon[1][0][4][2] = 5212; BaryonWeight <<
873 Baryon[1][4][0][2] = 5212; BaryonWeight <<
874 Baryon[4][0][1][2] = 5212; BaryonWeight <<
875 Baryon[4][1][0][2] = 5212; BaryonWeight <<
876 <<
877 // Xi_b0/Xi_b0' bus - 5232/5322 <<
878 Baryon[1][2][4][0] = 5232; BaryonWeight <<
879 Baryon[1][4][2][0] = 5232; BaryonWeight <<
880 Baryon[2][1][4][0] = 5232; BaryonWeight <<
881 Baryon[2][4][1][0] = 5232; BaryonWeight <<
882 Baryon[4][1][2][0] = 5232; BaryonWeight <<
883 Baryon[4][2][1][0] = 5232; BaryonWeight <<
884 <<
885 Baryon[1][2][4][2] = 5322; BaryonWeight <<
886 Baryon[1][4][2][2] = 5322; BaryonWeight <<
887 Baryon[2][1][4][2] = 5322; BaryonWeight <<
888 Baryon[2][4][1][2] = 5322; BaryonWeight <<
889 Baryon[4][1][2][2] = 5322; BaryonWeight <<
890 Baryon[4][2][1][2] = 5322; BaryonWeight <<
891 <<
892 // Xi_b-/Xi_b-' bus - 5132/5312 <<
893 Baryon[0][2][4][0] = 5132; BaryonWeight <<
894 Baryon[0][4][2][0] = 5132; BaryonWeight <<
895 Baryon[2][0][4][0] = 5132; BaryonWeight <<
896 Baryon[2][4][0][0] = 5132; BaryonWeight <<
897 Baryon[4][0][2][0] = 5132; BaryonWeight <<
898 Baryon[4][2][0][0] = 5132; BaryonWeight <<
899 <<
900 Baryon[0][2][4][2] = 5312; BaryonWeight <<
901 Baryon[0][4][2][2] = 5312; BaryonWeight <<
902 Baryon[2][0][4][2] = 5312; BaryonWeight <<
903 Baryon[2][4][0][2] = 5312; BaryonWeight <<
904 Baryon[4][0][2][2] = 5312; BaryonWeight <<
905 Baryon[4][2][0][2] = 5312; BaryonWeight <<
906 <<
907 for (G4int i=0; i<5; i++) <<
908 { for (G4int j=0; j<5; j++) <<
909 { for (G4int k=0; k<5; k++) <<
910 { for (G4int l=0; l<4; l++) <<
911 { <<
912 G4ParticleDefinition * Te <<
913 G4ParticleTable::GetPar <<
914 /* <<
915 G4cout<<i<<" "<<j<<" "<<k <<
916 if (TestHadron != nullptr <<
917 if ((TestHadron == nullpt <<
918 if ((TestHadron == nullpt <<
919 G4cout<<G4endl; <<
920 */ <<
921 if ((TestHadron == nullpt <<
922 } <<
923 } <<
924 } <<
925 } <<
926 <<
927 // --------- Probabilities of q-qbar pair <<
928 G4double ProbUUbar = 0.33; <<
929 Prob_QQbar[0]=ProbUUbar; // Probab <<
930 Prob_QQbar[1]=ProbUUbar; // Probab <<
931 Prob_QQbar[2]=1.0-2.*ProbUUbar; // Probab <<
932 Prob_QQbar[3]=0.0; // Probab <<
933 Prob_QQbar[4]=0.0; // Probab <<
934 <<
935 for ( G4int i=0 ; i<350 ; i++ ) { // Must <<
936 FS_LeftHadron[i] = 0; <<
937 FS_RightHadron[i] = 0; <<
938 FS_Weight[i] = 0.0; <<
939 } <<
940 <<
941 NumberOf_FS = 0; <<
942 } <<
943 <<
944 // ------------------------------------------- <<
945 <<
946 void G4VLongitudinalStringDecay::SetMinimalStr <<
947 { <<
948 //MaxMass = -350.0*GeV; <<
949 G4double EstimatedMass=MaxMass; <<
950 <<
951 G4ParticleDefinition* LeftParton = st <<
952 G4ParticleDefinition* RightParton = st <<
953 if( LeftParton->GetParticleSubType() = <<
954 if( LeftParton->GetPDGEncoding() * R <<
955 // Not allowed combination of the <<
956 throw G4HadronicException(__FILE__ <<
957 "G4VLongitudinalStringDecay::Set <<
958 } <<
959 } <<
960 if( LeftParton->GetParticleSubType() ! <<
961 if( LeftParton->GetPDGEncoding() * R <<
962 // Not allowed combination of the <<
963 throw G4HadronicException(__FILE__ <<
964 "G4VLongitudinalStringDecay::Set <<
965 } <<
966 } <<
967 <<
968 G4int Qleft =std::abs(string->GetLeftP <<
969 G4int Qright=std::abs(string->GetRight <<
970 <<
971 if ((Qleft < 6) && (Qright < 6)) { / <<
972 EstimatedMass=minMassQQbarStr[Qleft- <<
973 MinimalStringMass=EstimatedMass; <<
974 SetMinimalStringMass2(EstimatedMass) <<
975 return; <<
976 } <<
977 <<
978 if ((Qleft < 6) && (Qright > 1000)) { <<
979 G4int q1=Qright/1000; <<
980 G4int q2=(Qright/100)%10; <<
981 EstimatedMass=minMassQDiQStr[Qleft-1 <<
982 MinimalStringMass=EstimatedMass; <<
983 SetMinimalStringMass2(EstimatedMass) <<
984 return; <<
985 } <<
986 <<
987 if ((Qleft > 1000) && (Qright < 6)) { <<
988 G4int q1=Qleft/1000; <<
989 G4int q2=(Qleft/100)%10; <<
990 EstimatedMass=minMassQDiQStr[Qright- <<
991 MinimalStringMass=EstimatedMass; <<
992 SetMinimalStringMass2(EstimatedMass) <<
993 return; <<
994 } <<
995 <<
996 // DiQuark - Anti DiQuark string ----- <<
997 <<
998 G4double StringM=string->Get4Momentum().mag( <<
999 <<
1000 #ifdef debug_LUNDfragmentation <<
1001 // G4cout<<"MinStringMass// Input Str <<
1002 #endif <<
1003 <<
1004 G4int q1= Qleft/1000 ; <<
1005 G4int q2=(Qleft/100)%10 ; <<
1006 <<
1007 G4int q3= Qright/1000 ; <<
1008 G4int q4=(Qright/100)%10; <<
1009 <<
1010 // -------------- 2 baryon production <<
1011 <<
1012 G4double EstimatedMass1 = minMassQDiQ <<
1013 G4double EstimatedMass2 = minMassQDiQ <<
1014 // Mass is negative if there is no co <<
1015 <<
1016 if ( (EstimatedMass1 > 0.) && (Estima <<
1017 EstimatedMass = EstimatedMass1 + E <<
1018 if ( StringM > EstimatedMass ) { <<
1019 MinimalStringMass=EstimatedMass <<
1020 SetMinimalStringMass2(Estimated <<
1021 return; <<
1022 } <<
1023 } <<
1024 <<
1025 if ( (EstimatedMass1 < 0.) && (Estima <<
1026 EstimatedMass = MaxMass; <<
1027 MinimalStringMass=EstimatedMass; <<
1028 SetMinimalStringMass2(EstimatedMas <<
1029 return; <<
1030 } <<
1031 <<
1032 if ( (EstimatedMass1 > 0.) && (Estima <<
1033 EstimatedMass = EstimatedMass1; <<
1034 MinimalStringMass=EstimatedMass; <<
1035 SetMinimalStringMass2(EstimatedMas <<
1036 return; <<
1037 } <<
1038 <<
1039 // if ( EstimatedMass >= StringM <<
1040 // ------------- Re-orangement ------ <<
1041 EstimatedMass=std::min(minMassQQbarSt <<
1042 minMassQQbarSt <<
1043 <<
1044 // In principle, re-arrangement and 2 <<
1045 // More physics consideration is need <<
1046 <<
1047 MinimalStringMass=EstimatedMass; <<
1048 SetMinimalStringMass2(EstimatedMass); <<
1049 <<
1050 return; <<
1051 } <<
1052 <<
1053 //------------------------------------------- <<
1054 <<
1055 void G4VLongitudinalStringDecay::SetMinimalSt <<
1056 { <<
1057 MinimalStringMass2=aValue * aValue; <<
1058 } <<
1059 677
1060 678