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27 // << 27 // $Id: G4DiffractiveExcitation.cc,v 1.23 2010-11-15 10:02:38 vuzhinsk Exp $
28 <<
29 // ------------------------------------------- 28 // ------------------------------------------------------------
30 // GEANT 4 class implemetation file 29 // GEANT 4 class implemetation file
31 // 30 //
32 // ---------------- G4DiffractiveExcitati 31 // ---------------- G4DiffractiveExcitation --------------
33 // by Gunter Folger, October 1998. 32 // by Gunter Folger, October 1998.
34 // diffractive Excitation used by strin 33 // diffractive Excitation used by strings models
35 // Take a projectile and a target 34 // Take a projectile and a target
36 // excite the projectile and targe 35 // excite the projectile and target
37 // Essential changed by V. Uzhinsky in Novemb 36 // Essential changed by V. Uzhinsky in November - December 2006
38 // in order to put it in a correspondence wit 37 // in order to put it in a correspondence with original FRITIOF
39 // model. Variant of FRITIOF with nucleon de- 38 // model. Variant of FRITIOF with nucleon de-excitation is implemented.
40 // Other changes by V.Uzhinsky in May 2007 we 39 // Other changes by V.Uzhinsky in May 2007 were introduced to fit
41 // meson-nucleon interactions. Additional cha 40 // meson-nucleon interactions. Additional changes by V. Uzhinsky
42 // were introduced in December 2006. They tre 41 // were introduced in December 2006. They treat diffraction dissociation
43 // processes more exactly. 42 // processes more exactly.
44 // Correct treatment of the diffraction disso <<
45 // Mass distributions for resonances and uu-d <<
46 // and dd-diquarks suppression in neutrons we <<
47 // ------------------------------------------- 43 // ---------------------------------------------------------------------
48 44
>> 45
49 #include "globals.hh" 46 #include "globals.hh"
50 #include "Randomize.hh" 47 #include "Randomize.hh"
51 #include "G4PhysicalConstants.hh" <<
52 #include "G4SystemOfUnits.hh" <<
53 48
54 #include "G4DiffractiveExcitation.hh" 49 #include "G4DiffractiveExcitation.hh"
55 #include "G4FTFParameters.hh" 50 #include "G4FTFParameters.hh"
56 #include "G4ElasticHNScattering.hh" 51 #include "G4ElasticHNScattering.hh"
57 52
>> 53 #include "G4LorentzRotation.hh"
58 #include "G4RotationMatrix.hh" 54 #include "G4RotationMatrix.hh"
>> 55 #include "G4ThreeVector.hh"
59 #include "G4ParticleDefinition.hh" 56 #include "G4ParticleDefinition.hh"
60 #include "G4ParticleTable.hh" <<
61 #include "G4SampleResonance.hh" <<
62 #include "G4VSplitableHadron.hh" 57 #include "G4VSplitableHadron.hh"
63 #include "G4ExcitedString.hh" 58 #include "G4ExcitedString.hh"
>> 59 #include "G4ParticleTable.hh"
64 #include "G4Neutron.hh" 60 #include "G4Neutron.hh"
65 << 61 #include "G4ParticleDefinition.hh"
66 #include "G4Exp.hh" <<
67 #include "G4Log.hh" <<
68 #include "G4Pow.hh" <<
69 62
70 //#include "G4ios.hh" 63 //#include "G4ios.hh"
>> 64 //#include "UZHI_diffraction.hh"
71 65
72 //============================================ << 66 G4DiffractiveExcitation::G4DiffractiveExcitation()
73 << 67 {
74 //#define debugFTFexcitation <<
75 //#define debug_heavyHadrons <<
76 <<
77 //============================================ <<
78 <<
79 G4DiffractiveExcitation::G4DiffractiveExcitati <<
80 <<
81 <<
82 //============================================ <<
83 <<
84 G4DiffractiveExcitation::~G4DiffractiveExcitat <<
85 <<
86 <<
87 //============================================ <<
88 <<
89 G4bool G4DiffractiveExcitation::ExciteParticip <<
90 <<
91 <<
92 <<
93 <<
94 #ifdef debugFTFexcitation <<
95 G4cout << G4endl << "FTF ExciteParticipants <<
96 #endif <<
97 <<
98 CommonVariables common; <<
99 <<
100 // Projectile parameters <<
101 common.Pprojectile = projectile->Get4Momentu <<
102 if ( common.Pprojectile.z() < 0.0 ) return f <<
103 common.ProjectilePDGcode = projectile->GetDe <<
104 common.absProjectilePDGcode = std::abs( comm <<
105 common.M0projectile = projectile->GetDefinit <<
106 G4double ProjectileRapidity = common.Pprojec <<
107 <<
108 // Target parameters <<
109 common.Ptarget = target->Get4Momentum(); <<
110 common.TargetPDGcode = target->GetDefinition <<
111 common.absTargetPDGcode = std::abs( common.T <<
112 common.M0target = target->GetDefinition()->G <<
113 G4double TargetRapidity = common.Ptarget.rap <<
114 <<
115 // Kinematical properties of the interaction <<
116 G4LorentzVector Psum = common.Pprojectile + <<
117 common.S = Psum.mag2(); <<
118 common.SqrtS = std::sqrt( common.S ); <<
119 <<
120 // Check off-shellness of the participants <<
121 G4bool toBePutOnMassShell = true; //Uzhi Au <<
122 common.MminProjectile = common.BrW.GetMinimu <<
123 /* Uzhi Aug.2019 <<
124 if ( common.M0projectile < common.MminProjec <<
125 toBePutOnMassShell = true; <<
126 common.M0projectile = common.BrW.SampleMas <<
127 <<
128 <<
129 } <<
130 */ <<
131 common.M0projectile2 = common.M0projectile * <<
132 common.ProjectileDiffStateMinMass = thePa <<
133 common.ProjectileNonDiffStateMinMass = thePa <<
134 if ( common.M0projectile > common.Projectile <<
135 common.ProjectileDiffStateMinMass = com <<
136 common.ProjectileNonDiffStateMinMass = com <<
137 if ( common.absProjectilePDGcode > 3000 ) <<
138 common.ProjectileDiffStateMinMass += <<
139 common.ProjectileNonDiffStateMinMass += <<
140 } <<
141 } <<
142 common.MminTarget = common.BrW.GetMinimumMas <<
143 /* Uzhi Aug.2019 <<
144 if ( common.M0target < common.MminTarget ) { <<
145 toBePutOnMassShell = true; <<
146 common.M0target = common.BrW.SampleMass( t <<
147 t <<
148 + <<
149 } <<
150 */ <<
151 common.M0target2 = common.M0target * common. <<
152 common.TargetDiffStateMinMass = theParame <<
153 common.TargetNonDiffStateMinMass = theParame <<
154 if ( common.M0target > common.TargetDiffStat <<
155 common.TargetDiffStateMinMass = common. <<
156 common.TargetNonDiffStateMinMass = common. <<
157 if ( common.absTargetPDGcode > 3000 ) { / <<
158 common.TargetDiffStateMinMass += 140. <<
159 common.TargetNonDiffStateMinMass += 140. <<
160 } <<
161 }; <<
162 #ifdef debugFTFexcitation <<
163 G4cout << "Proj Targ PDGcodes " << common.Pr <<
164 << "Mprojectile Y " << common.Pproje <<
165 << "M0projectile Y " << common.M0proj <<
166 G4cout << "Mtarget Y " << common.Ptarge <<
167 << "M0target Y " << common.M0targ <<
168 G4cout << "Pproj " << common.Pprojectile << <<
169 #endif <<
170 <<
171 // Transform momenta to cms and then rotate <<
172 common.toCms = G4LorentzRotation( -1 * Psum. <<
173 G4LorentzVector Ptmp = common.toCms * common <<
174 if ( Ptmp.pz() <= 0.0 ) return false; // "S <<
175 common.toCms.rotateZ( -1*Ptmp.phi() ); <<
176 common.toCms.rotateY( -1*Ptmp.theta() ); <<
177 common.toLab = common.toCms.inverse(); <<
178 common.Pprojectile.transform( common.toCms ) <<
179 common.Ptarget.transform( common.toCms ); <<
180 <<
181 G4double SumMasses = common.M0projectile + c <<
182 #ifdef debugFTFexcitation <<
183 G4cout << "SqrtS " << common.SqrtS << G4 <<
184 << " " << common.M0target << " " << S <<
185 #endif <<
186 if ( common.SqrtS < SumMasses ) return false <<
187 <<
188 common.PZcms2 = ( sqr( common.S ) + sqr( com <<
189 - 2.0 * ( common.S * ( com <<
190 + common.M0proje <<
191 #ifdef debugFTFexcitation <<
192 G4cout << "PZcms2 after toBePutOnMassShell " <<
193 #endif <<
194 if ( common.PZcms2 < 0.0 ) return false; // <<
195 <<
196 common.PZcms = std::sqrt( common.PZcms2 ); <<
197 if ( toBePutOnMassShell ) { <<
198 if ( common.Pprojectile.z() > 0.0 ) { <<
199 common.Pprojectile.setPz( common.PZcms <<
200 common.Ptarget.setPz( -common.PZcms <<
201 } else { <<
202 common.Pprojectile.setPz( -common.PZcms <<
203 common.Ptarget.setPz( common.PZcms <<
204 } <<
205 common.Pprojectile.setE( std::sqrt( common <<
206 + comm <<
207 + comm <<
208 + comm <<
209 common.Ptarget.setE( std::sqrt( common.M0t <<
210 + common.P <<
211 + common.P <<
212 + common.P <<
213 } <<
214 #ifdef debugFTFexcitation <<
215 G4cout << "Start --------------------" << G4 <<
216 << " " << common.ProjectileDiffStateM <<
217 << G4endl <<
218 << "Targ M0 Mdif Mndif " << common.M0 <<
219 << " " << common.TargetNonDiffStateMi <<
220 << "Proj CMS " << common.Pprojectile <<
221 #endif <<
222 <<
223 // Check for possible quark exchange <<
224 ProjectileRapidity = common.Pprojectile.rapi <<
225 TargetRapidity = common.Ptarget.rapidity(); <<
226 G4double QeNoExc = theParameters->GetProcPro <<
227 G4double QeExc = theParameters->GetProcPro <<
228 theParameters->GetProcPro <<
229 common.ProbProjectileDiffraction = <<
230 theParameters->GetProcProb( 2, ProjectileR <<
231 common.ProbTargetDiffraction = <<
232 theParameters->GetProcProb( 3, ProjectileR <<
233 common.ProbOfDiffraction = common.ProbProjec <<
234 #ifdef debugFTFexcitation <<
235 G4cout << "Proc Probs " << QeNoExc << " " << <<
236 << common.ProbProjectileDiffraction < <<
237 << "ProjectileRapidity " << Projectil <<
238 #endif <<
239 <<
240 if ( QeNoExc + QeExc + common.ProbProjectile <<
241 QeNoExc = 1.0 - QeExc - common.ProbProject <<
242 } <<
243 if ( QeExc + QeNoExc != 0.0 ) { <<
244 common.ProbExc = QeExc / ( QeExc + QeNoExc <<
245 } <<
246 if ( 1.0 - QeExc - QeNoExc > 0.0 ) { <<
247 common.ProbProjectileDiffraction /= ( 1.0 <<
248 common.ProbTargetDiffraction /= ( 1.0 <<
249 } <<
250 #ifdef debugFTFexcitation <<
251 G4cout << "Proc Probs " << QeNoExc << " " << <<
252 << common.ProbProjectileDiffraction < <<
253 << "ProjectileRapidity " << Projectil <<
254 #endif <<
255 <<
256 // Try out charge exchange <<
257 G4int returnCode = 1; <<
258 if ( G4UniformRand() < QeExc + QeNoExc ) { <<
259 returnCode = ExciteParticipants_doChargeEx <<
260 <<
261 } <<
262 <<
263 G4bool returnResult = false; <<
264 if ( returnCode == 0 ) { <<
265 returnResult = true; // Successfully ende <<
266 } else if ( returnCode == 1 ) { <<
267 <<
268 common.ProbOfDiffraction = common.ProbProj <<
269 #ifdef debugFTFexcitation <<
270 G4cout << "Excitation -------------------- <<
271 << "Proj M0 MdMin MndMin " << commo <<
272 << common.ProjectileDiffStateMinMas <<
273 << G4endl <<
274 << "Targ M0 MdMin MndMin " << commo <<
275 << " " << common.TargetNonDiffState <<
276 << G4endl <<
277 << "Prob: ProjDiff TargDiff + Sum " <<
278 << common.ProbTargetDiffraction << <<
279 #endif <<
280 if ( common.ProbOfDiffraction != 0.0 ) { <<
281 common.ProbProjectileDiffraction /= comm <<
282 } else { <<
283 common.ProbProjectileDiffraction = 0.0; <<
284 } <<
285 #ifdef debugFTFexcitation <<
286 G4cout << "Prob: ProjDiff TargDiff + Sum " <<
287 << common.ProbTargetDiffraction << <<
288 #endif <<
289 common.ProjectileDiffStateMinMass2 = sq <<
290 common.ProjectileNonDiffStateMinMass2 = sq <<
291 common.TargetDiffStateMinMass2 = sq <<
292 common.TargetNonDiffStateMinMass2 = sq <<
293 // Choose between diffraction and non-diff <<
294 if ( G4UniformRand() < common.ProbOfDiffra <<
295 <<
296 returnResult = ExciteParticipants_doDiff <<
297 <<
298 } else { <<
299 <<
300 returnResult = ExciteParticipants_doNonD <<
301 <<
302 } <<
303 if ( returnResult ) { <<
304 common.Pprojectile += common.Qmomentum; <<
305 common.Ptarget -= common.Qmomentum; <<
306 // Transform back and update SplitableHa <<
307 common.Pprojectile.transform( common.toL <<
308 common.Ptarget.transform( common.toLab ) <<
309 #ifdef debugFTFexcitation <<
310 G4cout << "Mproj " << common.Pprojectile <<
311 << G4endl; <<
312 #endif <<
313 projectile->Set4Momentum( common.Pprojec <<
314 target->Set4Momentum( common.Ptarget ); <<
315 projectile->IncrementCollisionCount( 1 ) <<
316 target->IncrementCollisionCount( 1 ); <<
317 } <<
318 } <<
319 <<
320 return returnResult; <<
321 } 68 }
322 69
323 //-------------------------------------------- << 70 // ---------------------------------------------------------------------
>> 71 G4bool G4DiffractiveExcitation::
>> 72 ExciteParticipants(G4VSplitableHadron *projectile,
>> 73 G4VSplitableHadron *target,
>> 74 G4FTFParameters *theParameters,
>> 75 G4ElasticHNScattering *theElastic) const
>> 76 {
>> 77 // -------------------- Projectile parameters -----------------------
>> 78 G4LorentzVector Pprojectile=projectile->Get4Momentum();
>> 79
>> 80 if(Pprojectile.z() < 0.)
>> 81 {
>> 82 target->SetStatus(2);
>> 83 return false;
>> 84 }
>> 85
>> 86 G4double ProjectileRapidity = Pprojectile.rapidity();
>> 87
>> 88 G4int ProjectilePDGcode=projectile->GetDefinition()->GetPDGEncoding();
>> 89 G4int absProjectilePDGcode=std::abs(ProjectilePDGcode);
>> 90
>> 91 G4bool PutOnMassShell(false);
>> 92 // G4double M0projectile=projectile->GetDefinition()->GetPDGMass(); // With de-excitation
>> 93 G4double M0projectile = Pprojectile.mag(); // Without de-excitation
>> 94
>> 95 if(M0projectile < projectile->GetDefinition()->GetPDGMass())
>> 96 {
>> 97 PutOnMassShell=true;
>> 98 M0projectile=projectile->GetDefinition()->GetPDGMass();
>> 99 }
>> 100
>> 101 G4double M0projectile2 = M0projectile * M0projectile;
>> 102
>> 103 G4double ProjectileDiffStateMinMass=theParameters->GetProjMinDiffMass();
>> 104 G4double ProjectileNonDiffStateMinMass=theParameters->GetProjMinNonDiffMass();
>> 105 G4double ProbProjectileDiffraction=theParameters->GetProbabilityOfProjDiff();
>> 106
>> 107 // -------------------- Target parameters -------------------------
>> 108 G4int TargetPDGcode=target->GetDefinition()->GetPDGEncoding();
>> 109 G4int absTargetPDGcode=std::abs(TargetPDGcode);
>> 110 //G4cout<<"Excit "<<ProjectilePDGcode<<" "<<TargetPDGcode<<G4endl;
>> 111
>> 112 G4LorentzVector Ptarget=target->Get4Momentum();
>> 113
>> 114 G4double M0target = Ptarget.mag();
>> 115
>> 116 // G4double TargetRapidity = Ptarget.rapidity();
>> 117
>> 118 if(M0target < target->GetDefinition()->GetPDGMass())
>> 119 {
>> 120 PutOnMassShell=true;
>> 121 M0target=target->GetDefinition()->GetPDGMass();
>> 122 }
324 123
325 G4int G4DiffractiveExcitation:: << 124 G4double M0target2 = M0target * M0target;
326 ExciteParticipants_doChargeExchange( G4VSplita << 125
327 G4VSplita << 126 G4double TargetDiffStateMinMass=theParameters->GetTarMinDiffMass();
328 G4FTFPara << 127 G4double TargetNonDiffStateMinMass=theParameters->GetTarMinNonDiffMass();
329 G4Elastic << 128 G4double ProbTargetDiffraction=theParameters->GetProbabilityOfTarDiff();
330 G4Diffrac << 129
331 // First of the three utility methods used o << 130 G4double AveragePt2=theParameters->GetAveragePt2();
332 // it does the sampling for the charge-excha << 131
333 // This method returns an integer code - ins << 132 // G4double ProbOfDiffraction=ProbProjectileDiffraction +
334 // "0" : successfully ended and nothing el << 133 // ProbTargetDiffraction;
335 // "1" : successfully completed, but the w << 134
336 // "99" : unsuccessfully ended, nothing els << 135 G4double SumMasses=M0projectile+M0target+200.*MeV;
337 G4int returnCode = 99; << 136
338 << 137 // Kinematical properties of the interactions --------------
339 G4double DeltaProbAtQuarkExchange = theParam << 138 G4LorentzVector Psum; // 4-momentum in CMS
340 G4ParticleDefinition* TestParticle = 0; << 139 Psum=Pprojectile+Ptarget;
341 G4double MtestPr = 0.0, MtestTr = 0.0; << 140 G4double S=Psum.mag2();
342 << 141
343 #ifdef debugFTFexcitation << 142 // Transform momenta to cms and then rotate parallel to z axis;
344 G4cout << "Q exchange ---------------------- << 143 G4LorentzRotation toCms(-1*Psum.boostVector());
345 #endif << 144
346 << 145 G4LorentzVector Ptmp=toCms*Pprojectile;
347 // The target hadron is always a nucleon (i. << 146
348 // never an antinucleon), therefore only a q << 147 if ( Ptmp.pz() <= 0. )
349 // exchanged between the projectile hadron a << 148 {
350 // we could get a quark-quark-antiquark syst << 149 target->SetStatus(2);
351 // This implies that any projectile meson or << 150 // "String" moving backwards in CMS, abort collision !!
352 // a constituent quark in all cases - can ha << 151 return false;
353 // hadron. Instead, any projectile anti-bary << 152 }
354 // with a target hadron (because it has only << 153
355 // projectile baryons, instead can have char << 154 toCms.rotateZ(-1*Ptmp.phi());
356 << 155 toCms.rotateY(-1*Ptmp.theta());
357 G4int NewProjCode = 0, NewTargCode = 0, Proj << 156
358 // Projectile unpacking << 157 G4LorentzRotation toLab(toCms.inverse());
359 if ( common.absProjectilePDGcode < 1000 ) { << 158
360 UnpackMeson( common.ProjectilePDGcode, Pr << 159 Pprojectile.transform(toCms);
361 } else { << 160 Ptarget.transform(toCms);
362 UnpackBaryon( common.ProjectilePDGcode, Pr << 161
363 } << 162 G4double PZcms2, PZcms;
364 // Target unpacking << 163
365 G4int TargQ1 = 0, TargQ2 = 0, TargQ3 = 0; << 164 G4double SqrtS=std::sqrt(S);
366 UnpackBaryon( common.TargetPDGcode, TargQ1, << 165 //G4cout<<"SqrtS < 2300*MeV "<<SqrtS<<G4endl;
367 #ifdef debugFTFexcitation << 166 if(absProjectilePDGcode > 1000 && (SqrtS < 2300*MeV || SqrtS < SumMasses))
368 G4cout << "Proj Quarks " << ProjQ1 << " " << << 167 {target->SetStatus(2); return false;} // The model cannot work for
369 << "Targ Quarks " << TargQ1 << " " << << 168 // p+p-interactions
370 #endif << 169 // at Plab < 1.62 GeV/c.
371 << 170
372 // Sampling of exchanged quarks << 171 if(( absProjectilePDGcode == 211 || ProjectilePDGcode == 111) &&
373 G4int ProjExchangeQ = 0, TargExchangeQ = 0; << 172 ((SqrtS < 1600*MeV) || (SqrtS < SumMasses)))
374 if ( common.absProjectilePDGcode < 1000 ) { << 173 {target->SetStatus(2); return false;} // The model cannot work for
375 << 174 // Pi+p-interactions
376 G4bool isProjQ1Quark = false; << 175 // at Plab < 1. GeV/c.
377 ProjExchangeQ = ProjQ2; << 176
378 if ( ProjQ1 > 0 ) { // ProjQ1 is a quark << 177 if(( (absProjectilePDGcode == 321) || (ProjectilePDGcode == -311) ||
379 isProjQ1Quark = true; << 178 (absProjectilePDGcode == 311) || (absProjectilePDGcode == 130) ||
380 ProjExchangeQ = ProjQ1; << 179 (absProjectilePDGcode == 310)) && ((SqrtS < 1600*MeV) || (SqrtS < SumMasses)))
381 } << 180 {target->SetStatus(2); return false;} // The model cannot work for
382 // Exchange of non-identical quarks is all << 181 // K+p-interactions
383 G4int NpossibleStates = 0; << 182 // at Plab < ??? GeV/c. ???
384 if ( ProjExchangeQ != TargQ1 ) NpossibleSt << 183
385 if ( ProjExchangeQ != TargQ2 ) NpossibleSt << 184 PZcms2=(S*S+M0projectile2*M0projectile2+M0target2*M0target2-
386 if ( ProjExchangeQ != TargQ3 ) NpossibleSt << 185 2*S*M0projectile2 - 2*S*M0target2 - 2*M0projectile2*M0target2)
387 G4int Nsampled = (G4int)G4RandFlat::shootI << 186 /4./S;
388 NpossibleStates = 0; << 187
389 if ( ProjExchangeQ != TargQ1 ) { << 188 if(PZcms2 < 0)
390 if ( ++NpossibleStates == Nsampled ) { << 189 {target->SetStatus(2); return false;} // It can be in an interaction with
391 TargExchangeQ = TargQ1; TargQ1 = ProjE << 190 // off-shell nuclear nucleon
392 isProjQ1Quark ? ProjQ1 = TargExchangeQ << 191
393 } << 192 PZcms = std::sqrt(PZcms2);
394 } << 193
395 if ( ProjExchangeQ != TargQ2 ) { << 194 if(PutOnMassShell)
396 if ( ++NpossibleStates == Nsampled ) { << 195 {
397 TargExchangeQ = TargQ2; TargQ2 = ProjE << 196 if(Pprojectile.z() > 0.)
398 isProjQ1Quark ? ProjQ1 = TargExchangeQ << 197 {
399 } << 198 Pprojectile.setPz( PZcms);
400 } << 199 Ptarget.setPz( -PZcms);
401 if ( ProjExchangeQ != TargQ3 ) { << 200 }
402 if ( ++NpossibleStates == Nsampled ) { << 201 else
403 TargExchangeQ = TargQ3; TargQ3 = ProjE << 202 {
404 isProjQ1Quark ? ProjQ1 = TargExchangeQ << 203 Pprojectile.setPz(-PZcms);
405 } << 204 Ptarget.setPz( PZcms);
406 } << 205 };
407 #ifdef debugFTFexcitation << 206
408 G4cout << "Exchanged Qs in Pr Tr " << Proj << 207 Pprojectile.setE(std::sqrt(M0projectile2 +
409 #endif << 208 Pprojectile.x()*Pprojectile.x()+
410 << 209 Pprojectile.y()*Pprojectile.y()+
411 G4int aProjQ1 = std::abs( ProjQ1 ), aProjQ << 210 PZcms2));
412 G4bool ProjExcited = false; << 211 Ptarget.setE(std::sqrt(M0target2 +
413 const G4int maxNumberOfAttempts = 50; << 212 Ptarget.x()*Ptarget.x()+
414 G4int attempts = 0; << 213 Ptarget.y()*Ptarget.y()+
415 while ( attempts++ < maxNumberOfAttempts ) << 214 PZcms2));
416 << 215 }
417 // Determination of a new projectile ID << 216
418 G4double ProbSpin0 = 0.5; << 217 G4double maxPtSquare; // = PZcms2;
419 G4double Ksi = G4UniformRand(); << 218 /*
420 if ( aProjQ1 == aProjQ2 ) { << 219 G4cout<<"Start --------------------"<<G4endl;
421 if ( G4UniformRand() < ProbSpin0 ) { << 220 G4cout<<"Proj "<<M0projectile<<" "<<ProjectileDiffStateMinMass<<" "<<ProjectileNonDiffStateMinMass<<G4endl;
422 if ( aProjQ1 < 3 ) { << 221 G4cout<<"Targ "<<M0target <<" "<<TargetDiffStateMinMass <<" "<<TargetNonDiffStateMinMass<<G4endl;
423 NewProjCode = 111; << 222 G4cout<<"SqrtS "<<SqrtS<<G4endl;
424 if ( Ksi < 0.5 ) { << 223 G4cout<<"Rapid "<<ProjectileRapidity<<G4endl; //" "<<TargetRapidity<<G4endl;
425 NewProjCode = 221; << 224 */
426 if ( Ksi < 0.25 ) { << 225 // Charge exchange can be possible for baryons -----------------
427 NewProjCode = 331; << 226
428 } << 227 // Getting the values needed for exchange ----------------------
429 } << 228 G4double MagQuarkExchange =theParameters->GetMagQuarkExchange();
430 } else if ( aProjQ1 == 3 ) { << 229 G4double SlopeQuarkExchange =theParameters->GetSlopeQuarkExchange();
431 NewProjCode = 221; << 230 G4double DeltaProbAtQuarkExchange=theParameters->GetDeltaProbAtQuarkExchange();
432 if ( Ksi < 0.5 ) { << 231
433 NewProjCode = 331; << 232 // G4double NucleonMass=
434 } << 233 // (G4ParticleTable::GetParticleTable()->FindParticle(2112))->GetPDGMass();
435 } else if ( aProjQ1 == 4 ) { << 234 G4double DeltaMass=
436 NewProjCode = 441; // eta << 235 (G4ParticleTable::GetParticleTable()->FindParticle(2224))->GetPDGMass();
437 } else if ( aProjQ1 == 5 ) { << 236
438 NewProjCode = 551; // eta << 237 //G4cout<<MagQuarkExchange*std::exp(-SlopeQuarkExchange*(ProjectileRapidity - TargetRapidity))<<G4endl;
439 } << 238
440 } else { << 239 //G4cout<<"Q exc Mag Slop Wdelta"<<MagQuarkExchange<<" "<<SlopeQuarkExchange<<" "<<DeltaProbAtQuarkExchange<<G4endl;
441 if ( aProjQ1 < 3 ) { << 240 //G4cout<<"ProjectileRapidity "<<ProjectileRapidity<<G4endl;
442 NewProjCode = 113; << 241 //G4cout<<MagQuarkExchange*std::exp(-SlopeQuarkExchange*(ProjectileRapidity))<<G4endl;
443 if ( Ksi < 0.5 ) { << 242 //G4int Uzhi; G4cin>>Uzhi;
444 NewProjCode = 223; << 243 // Check for possible quark exchange -----------------------------------
445 } << 244
446 } else if ( aProjQ1 == 3 ) { << 245 if(G4UniformRand() < MagQuarkExchange*
447 NewProjCode = 333; << 246 std::exp(-SlopeQuarkExchange*ProjectileRapidity)) //TargetRapidity))) 1.45
448 } else if ( aProjQ1 == 4 ) { << 247 {
449 NewProjCode = 443; // J/p << 248 // std::exp(-SlopeQuarkExchange*(ProjectileRapidity - 1.36))) //TargetRapidity))) 1.45
450 } else if ( aProjQ1 == 5 ) { << 249 //G4cout<<"Q exchange"<<G4endl;
451 NewProjCode = 553; // Ups << 250 G4int NewProjCode(0), NewTargCode(0);
452 } << 251
>> 252 G4int ProjQ1(0), ProjQ2(0), ProjQ3(0);
>> 253
>> 254 // Projectile unpacking --------------------------
>> 255 if(absProjectilePDGcode < 1000 )
>> 256 { // projectile is meson -----------------
>> 257 UnpackMeson(ProjectilePDGcode, ProjQ1, ProjQ2);
>> 258 } else
>> 259 { // projectile is baryon ----------------
>> 260 UnpackBaryon(ProjectilePDGcode, ProjQ1, ProjQ2, ProjQ3);
>> 261 } // End of the hadron's unpacking ----------
>> 262
>> 263 // Target unpacking ------------------------------
>> 264 G4int TargQ1(0), TargQ2(0), TargQ3(0);
>> 265 UnpackBaryon(TargetPDGcode, TargQ1, TargQ2, TargQ3);
>> 266
>> 267 //G4cout<<ProjQ1<<" "<<ProjQ2<<" "<<ProjQ3<<G4endl;
>> 268 //G4cout<<TargQ1<<" "<<TargQ2<<" "<<TargQ3<<G4endl;
>> 269 // Sampling of exchanged quarks -------------------
>> 270 G4int ProjExchangeQ(0);
>> 271 G4int TargExchangeQ(0);
>> 272
>> 273 if(absProjectilePDGcode < 1000 )
>> 274 { // projectile is meson -----------------
>> 275
>> 276 if(ProjQ1 > 0 ) // ProjQ1 is quark
>> 277 {
>> 278 ProjExchangeQ = ProjQ1;
>> 279 if(ProjExchangeQ != TargQ1)
>> 280 {
>> 281 TargExchangeQ = TargQ1; TargQ1=ProjExchangeQ; ProjQ1=TargExchangeQ;
>> 282 } else
>> 283 if(ProjExchangeQ != TargQ2)
>> 284 {
>> 285 TargExchangeQ = TargQ2; TargQ2=ProjExchangeQ; ProjQ1=TargExchangeQ;
>> 286 } else
>> 287 {
>> 288 TargExchangeQ = TargQ3; TargQ3=ProjExchangeQ; ProjQ1=TargExchangeQ;
453 } 289 }
454 } else { << 290 } else // ProjQ2 is quark
455 if ( aProjQ1 > aProjQ2 ) { << 291 {
456 NewProjCode = aProjQ1*100 + aProjQ2* << 292 ProjExchangeQ = ProjQ2;
457 } else { << 293 if(ProjExchangeQ != TargQ1)
458 NewProjCode = aProjQ2*100 + aProjQ1* << 294 {
>> 295 TargExchangeQ = TargQ1; TargQ1=ProjExchangeQ; ProjQ2=TargExchangeQ;
>> 296 } else
>> 297 if(ProjExchangeQ != TargQ2)
>> 298 {
>> 299 TargExchangeQ = TargQ2; TargQ2=ProjExchangeQ; ProjQ2=TargExchangeQ;
>> 300 } else
>> 301 {
>> 302 TargExchangeQ = TargQ3; TargQ3=ProjExchangeQ; ProjQ2=TargExchangeQ;
459 } 303 }
460 } << 304 } // End of if(ProjQ1 > 0 ) // ProjQ1 is quark
461 #ifdef debugFTFexcitation <<
462 G4cout << "NewProjCode " << NewProjCode <<
463 #endif <<
464 // Decide (with 50% probability) whether <<
465 // but not in the case of charmed and bo <<
466 // there are no excited charmed and bott <<
467 ProjExcited = false; <<
468 if ( aProjQ1 <= 3 && aProjQ2 <= 3 && <<
469 NewProjCode += 2; // Excited meson (J <<
470 ProjExcited = true; <<
471 } <<
472 305
473 // So far we have used the absolute valu << 306 G4int aProjQ1=std::abs(ProjQ1);
474 // now look at their signed values to se << 307 G4int aProjQ2=std::abs(ProjQ2);
475 G4int value = ProjQ1, absValue = aProjQ1 << 308 if(aProjQ1 == aProjQ2) {NewProjCode = 111;} // Pi0-meson
476 for ( G4int iQ = 0; iQ < 2; ++iQ ) { // << 309 else // |ProjQ1| # |ProjQ2|
477 if ( iQ == 1 ) { << 310 {
478 value = ProjQ2; absValue = aProjQ2; << 311 if(aProjQ1 > aProjQ2) {NewProjCode = aProjQ1*100+aProjQ2*10+1;}
479 } << 312 else {NewProjCode = aProjQ2*100+aProjQ1*10+1;}
480 if ( absValue == 2 || absValue == 4 << 313 NewProjCode *=(ProjectilePDGcode/absProjectilePDGcode);
481 Qquarks += 2*value/absValue; // u, << 314 }
482 } else { << 315
483 Qquarks -= value/absValue; // d, << 316 G4bool ProjExcited=false;
>> 317 if(G4UniformRand() < 0.5)
>> 318 {
>> 319 NewProjCode +=2; // Excited Pi0-meson
>> 320 ProjExcited=true;
484 } 321 }
485 } << 322 //G4cout<<G4endl<<"NewProjCode "<<NewProjCode<<G4endl;
486 // If Qquarks is positive, the sign of N <<
487 // If Qquarks is negative, then the sign <<
488 // If Qquarks is zero, then we need to d <<
489 // 1. If aProjQ1 and aProjQ2 are the sam <<
490 // (because the antiparticle is the s <<
491 // 2. If aProjQ1 and aProjQ2 are not the <<
492 // we have only two possibilities: <<
493 // a. aProjQ1 and aProjQ2 are two dif <<
494 // (s,d) or (b,d), or (b,s). In th <<
495 // is fine (because the heaviest o <<
496 // to be anti-quark belonging to t <<
497 // implies a meson with positive P <<
498 // b. aProjQ1 and aProjQ2 are two dif <<
499 // The heaviest of the two (c) has <<
500 // in the projectile, therefore th <<
501 // reverse: 421 -> -421 anti_D0 (c <<
502 if ( Qquarks < 0 || ( Qquarks == 0 && <<
503 NewProjCode *= -1; <<
504 } <<
505 #ifdef debugFTFexcitation <<
506 G4cout << "NewProjCode +2 or 0 " << NewP <<
507 G4cout<<"+++++++++++++++++++++++++++++++ <<
508 G4cout<<ProjQ1<<" "<<ProjQ2<<" "<<Qquark <<
509 G4cout<<"+++++++++++++++++++++++++++++++ <<
510 #endif <<
511 <<
512 // Proj <<
513 TestParticle = G4ParticleTable::GetParti <<
514 if ( ! TestParticle ) continue; <<
515 common.MminProjectile = common.BrW.GetMi <<
516 if ( common.SqrtS - common.M0target < co <<
517 MtestPr = common.BrW.SampleMass( TestPar <<
518 <<
519 #ifdef debugFTFexcitation <<
520 G4cout << "TestParticle Name " << NewPro <<
521 << G4endl <<
522 << "MtestPart MtestPart0 "<<Mtest <<
523 << "M0projectile projectile PDGMa <<
524 << projectile->GetDefinition()->G <<
525 #endif <<
526 <<
527 // Targ <<
528 NewTargCode = NewNucleonId( TargQ1, Targ <<
529 #ifdef debugFTFexcitation <<
530 G4cout << "New TrQ " << TargQ1 << " " << <<
531 << "NewTargCode " << NewTargCode <<
532 #endif <<
533 <<
534 // If the target has not heavy (charm or <<
535 // see whether a Delta isobar can be cre <<
536 if ( TargQ1 <= 3 && TargQ2 <= 3 && T <<
537 if ( TargQ1 != TargQ2 && TargQ1 != T <<
538 if ( G4UniformRand() < 0.5 ) { <<
539 NewTargCode += 2; <<
540 } else if ( G4UniformRand() < 0.75 ) <<
541 NewTargCode = 3122; // Lambda <<
542 } <<
543 } else if ( TargQ1 == TargQ2 && Targ <<
544 NewTargCode += 2; ProjExcited = true <<
545 } else if ( target->GetDefinition()->G <<
546 if ( G4UniformRand() > DeltaProbAtQu <<
547 NewTargCode += 2; ProjExcited = tr <<
548 } <<
549 } else if ( ! ProjExcited && <<
550 G4UniformRand() < DeltaPro <<
551 common.SqrtS > common.M0pr <<
552 G4ParticleTable::GetP <<
553 NewTargCode += 2; // Create Delta i <<
554 } <<
555 } <<
556 323
557 // Protection against: << 324 G4ParticleDefinition* TestParticle=0;
558 // - Lambda* (i.e. excited Lambda state) << 325 TestParticle=G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode);
559 // - Sigma* (i.e. excited Sigma hyperon << 326 if(TestParticle)
560 // - Xi* (i.e. excited Xi hyperon st << 327 {
561 if ( NewTargCode == 3124 || // Lambda << 328 M0projectile=
562 NewTargCode == 3224 || // Sigma*+ NOT << 329 (G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode))->GetPDGMass();
563 NewTargCode == 3214 || // Sigma*0 NOT << 330 M0projectile2 = M0projectile * M0projectile;
564 NewTargCode == 3114 || // Sigma*- NOT << 331
565 NewTargCode == 3324 || // Xi*0 NOT << 332 ProjectileDiffStateMinMass =M0projectile+210.*MeV; //210 MeV=m_pi+70 MeV
566 NewTargCode == 3314 ) { // Xi*- NOT << 333 ProjectileNonDiffStateMinMass=M0projectile+210.*MeV; //210 MeV=m_pi+70 MeV
567 //G4cout << "G4DiffractiveExcitation::Excite << 334 } else
568 // << NewTargCode << G4endl; << 335 {return false;}
569 NewTargCode -= 2; // Corresponding ground-s << 336
570 } << 337 //G4cout<<"New TrQ "<<TargQ1<<" "<<TargQ2<<" "<<TargQ3<<G4endl;
571 << 338 NewTargCode = NewNucleonId(TargQ1, TargQ2, TargQ3);
572 // Special treatment for charmed and bot << 339 //G4cout<<"NewTargCode "<<NewTargCode<<G4endl;
573 // so we need to transform them by hand << 340
574 #ifdef debug_heavyHadrons << 341 if( (TargQ1 == TargQ2) && (TargQ1 == TargQ3) &&
575 G4int initialNewTargCode = NewTargCode; << 342 (SqrtS > M0projectile+DeltaMass)) {NewTargCode +=2; //Create Delta isobar
576 #endif << 343 ProjExcited=true;}
577 if ( NewTargCode == 4322 ) NewTargC << 344 else if( target->GetDefinition()->GetPDGiIsospin() == 3 ) //Delta was the target
578 else if ( NewTargCode == 4312 ) NewTargC << 345 { if(G4UniformRand() > DeltaProbAtQuarkExchange){NewTargCode +=2; //Save Delta isobar
579 else if ( NewTargCode == 5312 ) NewTargC << 346 ProjExcited=true;}
580 else if ( NewTargCode == 5322 ) NewTargC << 347 else {} // De-excite initial Delta isobar
581 #ifdef debug_heavyHadrons << 348 }
582 if ( NewTargCode != initialNewTargCode ) << 349
583 G4cout << "G4DiffractiveExcitation::ExcitePa << 350 // else if((!CreateDelta) &&
584 << "\t target heavy baryon with pdgCo << 351 else if((!ProjExcited) &&
585 << " into pdgCode=" << NewTargCode << << 352 (G4UniformRand() < DeltaProbAtQuarkExchange) && //Nucleon was the target
586 } << 353 (SqrtS > M0projectile+DeltaMass)) {NewTargCode +=2;} //Create Delta isobar
587 #endif << 354 // else if( CreateDelta) {NewTargCode +=2;}
588 << 355 else {} //Save initial nucleon
589 TestParticle = G4ParticleTable::GetParti << 356
590 if ( ! TestParticle ) continue; << 357 // target->SetDefinition( // Fix 15.12.09
591 #ifdef debugFTFexcitation << 358 // G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode));// Fix 15.12.09
592 G4cout << "New targ " << NewTargCode << << 359
593 #endif << 360 //G4cout<<"NewTargCode "<<NewTargCode<<G4endl;
594 common.MminTarget = common.BrW.GetMinimu << 361 //G4int Uzhi; G4cin>>Uzhi;
595 if ( common.SqrtS - MtestPr < common.Mmi << 362 TestParticle=G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode);
596 MtestTr = common.BrW.SampleMass( TestPar << 363 if(TestParticle)
597 << 364 {
598 if ( common.SqrtS > MtestPr + MtestTr ) << 365 M0target=
599 << 366 (G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode))->GetPDGMass();
600 } // End of while loop << 367 M0target2 = M0target * M0target;
601 if ( attempts >= maxNumberOfAttempts ) ret << 368
602 << 369 TargetDiffStateMinMass =M0target+220.*MeV; //220 MeV=m_pi+80 MeV;
603 if ( MtestPr >= common.Pprojectile.mag() << 370 TargetNonDiffStateMinMass=M0target+220.*MeV; //220 MeV=m_pi+80 MeV;
604 common.M0projectile = MtestPr; << 371 } else
605 } << 372 {return false;}
606 #ifdef debugFTFexcitation << 373 } else
607 G4cout << "M0projectile After check " << c << 374 { // projectile is baryon ----------------
608 #endif << 375 //=========================================================================
609 common.M0projectile2 = common.M0projectile << 376 G4double Same=theParameters->GetProbOfSameQuarkExchange(); //0.3; //0.5; 0.
610 common.ProjectileDiffStateMinMass = com << 377 G4bool ProjDeltaHasCreated(false);
611 common.ProjectileNonDiffStateMinMass = com << 378 G4bool TargDeltaHasCreated(false);
612 if ( MtestTr >= common.Ptarget.mag() || << 379
613 common.M0target = MtestTr; << 380 G4double Ksi=G4UniformRand();
614 } << 381 if(G4UniformRand() < 0.5) // Sampling exchange quark from proj. or targ.
615 common.M0target2 = common.M0target * commo << 382 { // Sampling exchanged quark from the projectile ---
616 #ifdef debugFTFexcitation << 383 if( Ksi < 0.333333 )
617 G4cout << "New targ M0 M0^2 " << common.M0 << 384 {ProjExchangeQ = ProjQ1;}
618 #endif << 385 else if( (0.333333 <= Ksi) && (Ksi < 0.666667))
619 common.TargetDiffStateMinMass = common. << 386 {ProjExchangeQ = ProjQ2;}
620 common.TargetNonDiffStateMinMass = common. << 387 else
621 << 388 {ProjExchangeQ = ProjQ3;}
622 } else { // of the if ( common.absProjectil << 389
623 << 390 //G4cout<<"ProjExchangeQ "<<ProjExchangeQ<<G4endl;
624 // If it is a projectile anti-baryon, no q << 391 if((ProjExchangeQ != TargQ1)||(G4UniformRand()<Same))
625 // therefore returns immediately 1 (which << 392 {
626 // needs to be continued"). << 393 TargExchangeQ = TargQ1; TargQ1=ProjExchangeQ; ProjExchangeQ=TargExchangeQ;
627 if ( common.ProjectilePDGcode < 0 ) return << 394 } else
628 << 395 if((ProjExchangeQ != TargQ2)||(G4UniformRand()<Same))
629 // Choose randomly, with equal probability << 396 {
630 // projectile or target hadron for selecti << 397 TargExchangeQ = TargQ2; TargQ2=ProjExchangeQ; ProjExchangeQ=TargExchangeQ;
631 G4bool isProjectileExchangedQ = false; << 398 } else
632 G4int firstQ = TargQ1, secondQ = << 399 {
633 G4int otherFirstQ = ProjQ1, otherSecondQ = << 400 TargExchangeQ = TargQ3; TargQ3=ProjExchangeQ; ProjExchangeQ=TargExchangeQ;
634 if ( G4UniformRand() < 0.5 ) { <<
635 isProjectileExchangedQ = true; <<
636 firstQ = ProjQ1; secondQ = Pro <<
637 otherFirstQ = TargQ1; otherSecondQ = Tar <<
638 } <<
639 // Choose randomly, with equal probability <<
640 // selected (projectile or target) hadron <<
641 G4int exchangedQ = 0; <<
642 G4double Ksi = G4UniformRand(); <<
643 if ( Ksi < 0.333333 ) { <<
644 exchangedQ = firstQ; <<
645 } else if ( 0.333333 <= Ksi && Ksi < 0.6 <<
646 exchangedQ = secondQ; <<
647 } else { <<
648 exchangedQ = thirdQ; <<
649 } <<
650 #ifdef debugFTFexcitation <<
651 G4cout << "Exchange Qs isProjectile Q " << <<
652 #endif <<
653 // The exchanged quarks (one of the projec <<
654 // are always accepted if they have differ <<
655 // same flavour) they are accepted only wi <<
656 G4double probSame = theParameters->GetProb <<
657 const G4int MaxCount = 100; <<
658 G4int count = 0, otherExchangedQ = 0; <<
659 do { <<
660 if ( exchangedQ != otherFirstQ || G4Un <<
661 otherExchangedQ = otherFirstQ; otherFi <<
662 } else { <<
663 if ( exchangedQ != otherSecondQ || G <<
664 otherExchangedQ = otherSecondQ; othe <<
665 } else { <<
666 if ( exchangedQ != otherThirdQ || <<
667 otherExchangedQ = otherThirdQ; oth <<
668 } <<
669 } <<
670 } <<
671 } while ( otherExchangedQ == 0 && ++coun <<
672 if ( count >= MaxCount ) return returnCode <<
673 // Swap (between projectile and target had <<
674 // as "exchanged" quarks. <<
675 if ( Ksi < 0.333333 ) { <<
676 firstQ = exchangedQ; <<
677 } else if ( 0.333333 <= Ksi && Ksi < 0.6 <<
678 secondQ = exchangedQ; <<
679 } else { <<
680 thirdQ = exchangedQ; <<
681 } <<
682 if ( isProjectileExchangedQ ) { <<
683 ProjQ1 = firstQ; ProjQ2 = secondQ; <<
684 TargQ1 = otherFirstQ; TargQ2 = otherSeco <<
685 } else { <<
686 TargQ1 = firstQ; TargQ2 = secondQ; <<
687 ProjQ1 = otherFirstQ; ProjQ2 = otherSeco <<
688 } <<
689 #ifdef debugFTFexcitation <<
690 G4cout << "Exchange Qs Pr Tr " << ( isPro <<
691 << " " << ( isProjectileExchangedQ <<
692 #endif <<
693 <<
694 NewProjCode = NewNucleonId( ProjQ1, ProjQ2 <<
695 NewTargCode = NewNucleonId( TargQ1, TargQ2 <<
696 // Decide whether the new projectile hadro <<
697 // then decide whether the new target hadr <<
698 // Notice that a Delta particle has the la <<
699 // whereas a nucleon has "2" (because its <<
700 // If the new projectile hadron or the new <<
701 // constituent quark, then skip this part <<
702 // excited charm and bottom hadrons). <<
703 for ( G4int iHadron = 0; iHadron < 2; iHad <<
704 // First projectile hadron, then target <<
705 G4int codeQ1 = ProjQ1, codeQ2 = ProjQ2, <<
706 G4double massConstraint = common.M0targe <<
707 G4bool isHadronADelta = ( projectile->Ge <<
708 if ( iHadron == 1 ) { // Target hadron <<
709 codeQ1 = TargQ1, codeQ2 = TargQ2, code <<
710 massConstraint = common.M0projectile; <<
711 isHadronADelta = ( target->GetDefiniti <<
712 } <<
713 if ( codeQ1 > 3 || codeQ2 > 3 || cod <<
714 if ( codeQ1 == codeQ2 && codeQ1 == cod <<
715 newHadCode += 2; // Delta++ (uuu) or <<
716 } else if ( isHadronADelta ) { // Hadro <<
717 if ( G4UniformRand() > DeltaProbAtQuar <<
718 newHadCode += 2; // Delta+ (uud) or <<
719 } else { <<
720 newHadCode += 0; // No delta (so th <<
721 } <<
722 } else { // Hadron (projectile or targe <<
723 if ( G4UniformRand() < DeltaProbAtQuar <<
724 common.SqrtS > G4ParticleTable::G <<
725 + massConstraint ) <<
726 newHadCode += 2; // Delta+ (uud) or <<
727 } else { <<
728 newHadCode += 0; // No delta (so th <<
729 } 401 }
730 } <<
731 if ( iHadron == 0 ) { // Projectile had <<
732 NewProjCode = newHadCode; <<
733 } else { // Target hadron <<
734 NewTargCode = newHadCode; <<
735 } <<
736 } <<
737 #ifdef debugFTFexcitation <<
738 G4cout << "NewProjCode NewTargCode " << Ne <<
739 #endif <<
740 <<
741 // Protection against: <<
742 // - Lambda* (i.e. excited Lambda state) <<
743 // - Sigma* (i.e. excited Sigma hyperon s <<
744 // - Xi* (i.e. excited Xi hyperon stat <<
745 if ( NewProjCode == 3124 || // Lambda* <<
746 NewProjCode == 3224 || // Sigma*+ NOT ex <<
747 NewProjCode == 3214 || // Sigma*0 NOT ex <<
748 NewProjCode == 3114 || // Sigma*- NOT ex <<
749 NewProjCode == 3324 || // Xi*0 NOT ex <<
750 NewProjCode == 3314 ) { // Xi*- NOT ex <<
751 //G4cout << "G4DiffractiveExcitation::Ex <<
752 // << NewProjCode << G4endl; <<
753 NewProjCode -= 2; // Corresponding grou <<
754 } <<
755 if ( NewTargCode == 3124 || // Lambda* <<
756 NewTargCode == 3224 || // Sigma*+ NOT ex <<
757 NewTargCode == 3214 || // Sigma*0 NOT ex <<
758 NewTargCode == 3114 || // Sigma*- NOT ex <<
759 NewTargCode == 3324 || // Xi*0 NOT ex <<
760 NewTargCode == 3314 ) { // Xi*- NOT ex <<
761 //G4cout << "G4DiffractiveExcitation::Ex <<
762 // << NewTargCode << G4endl; <<
763 NewTargCode -= 2; // Corresponding grou <<
764 } <<
765 402
766 // Special treatment for charmed and botto << 403 //G4cout<<"ProjExchangeQ "<<ProjExchangeQ<<G4endl;
767 // so we need to transform them by hand to << 404 //G4cout<<"TargExchangeQ "<<TargExchangeQ<<G4endl;
768 #ifdef debug_heavyHadrons << 405 if( Ksi < 0.333333 )
769 G4int initialNewProjCode = NewProjCode, in << 406 {ProjQ1=ProjExchangeQ;}
770 #endif << 407 else if( (0.333333 <= Ksi) && (Ksi < 0.666667))
771 if ( NewProjCode == 4322 ) NewProjCod << 408 {ProjQ2=ProjExchangeQ;}
772 else if ( NewProjCode == 4312 ) NewProjCod << 409 else
773 else if ( NewProjCode == 5312 ) NewProjCod << 410 {ProjQ3=ProjExchangeQ;}
774 else if ( NewProjCode == 5322 ) NewProjCod << 411
775 if ( NewTargCode == 4322 ) NewTargCod << 412 } else
776 else if ( NewTargCode == 4312 ) NewTargCod << 413 { // Sampling exchanged quark from the target -------
777 else if ( NewTargCode == 5312 ) NewTargCod << 414 if( Ksi < 0.333333 )
778 else if ( NewTargCode == 5322 ) NewTargCod << 415 {TargExchangeQ = TargQ1;}
779 #ifdef debug_heavyHadrons << 416 else if( (0.333333 <= Ksi) && (Ksi < 0.666667))
780 if ( NewProjCode != initialNewProjCode || << 417 {TargExchangeQ = TargQ2;}
781 G4cout << "G4DiffractiveExcitation::Exci << 418 else
782 << "\t heavy baryon into an exist << 419 {TargExchangeQ = TargQ3;}
783 if ( NewProjCode != initialNewProjCode ) << 420
784 G4cout << "\t \t projectile baryon with pdgC << 421 if((TargExchangeQ != ProjQ1)||(G4UniformRand()<Same))
785 << " into pdgCode=" << NewProjCode << << 422 {
786 } << 423 ProjExchangeQ = ProjQ1; ProjQ1=TargExchangeQ; TargExchangeQ=ProjExchangeQ;
787 if ( NewTargCode != initialNewTargCode ) << 424 } else
788 G4cout << "\t \t target baryon with pd << 425 if((TargExchangeQ != ProjQ2)||(G4UniformRand()<Same))
789 << " into pdgCode=" << NewTargCode << << 426 {
790 } << 427 ProjExchangeQ = ProjQ2; ProjQ2=TargExchangeQ; TargExchangeQ=ProjExchangeQ;
791 } << 428 } else
792 #endif << 429 {
793 << 430 ProjExchangeQ = ProjQ3; ProjQ3=TargExchangeQ; TargExchangeQ=ProjExchangeQ;
794 // Sampling of the masses of the projectil <<
795 // Because of energy conservation, the ord <<
796 // randomly, half of the time we sample fi <<
797 // then the projectile nucleon mass, and t <<
798 // sample first the projectile nucleon mas <<
799 G4VSplitableHadron* firstHadron = target; <<
800 G4VSplitableHadron* secondHadron = project <<
801 G4int firstHadronCode = NewTargCode, secon <<
802 G4double massConstraint = common.M0project <<
803 G4bool isFirstTarget = true; <<
804 if ( G4UniformRand() < 0.5 ) { <<
805 // Sample first the projectile nucleon m <<
806 firstHadron = projectile; secondHa <<
807 firstHadronCode = NewProjCode; secondHa <<
808 massConstraint = common.M0target; <<
809 isFirstTarget = false; <<
810 } <<
811 G4double Mtest1st = 0.0, Mtest2nd = 0.0, M <<
812 for ( int iSamplingCase = 0; iSamplingCase <<
813 G4VSplitableHadron* aHadron = firstHadro <<
814 G4int aHadronCode = firstHadronCode; <<
815 if ( iSamplingCase == 1 ) { // Second n <<
816 aHadron = secondHadron; aHadronCode = <<
817 } <<
818 G4double MtestHadron = 0.0, MminHadron = <<
819 if ( aHadron->GetStatus() == 1 || aHad <<
820 TestParticle = G4ParticleTable::GetPar <<
821 if ( ! TestParticle ) return returnCod <<
822 MminHadron = common.BrW.GetMinimumMass <<
823 if ( common.SqrtS - massConstraint < M <<
824 if ( TestParticle->GetPDGWidth() == 0. <<
825 MtestHadron = common.BrW.SampleMass( <<
826 } else { <<
827 const G4int maxNumberOfAttempts = 50 <<
828 G4int attempts = 0; <<
829 while ( attempts < maxNumberOfAttemp <<
830 attempts++; <<
831 MtestHadron = common.BrW.SampleMas <<
832 <<
833 if ( common.SqrtS < MtestHadron + <<
834 continue; // Kinematically unac <<
835 } else { <<
836 break; // Kinematically acce <<
837 } <<
838 } <<
839 if ( attempts >= maxNumberOfAttempts <<
840 } 431 }
841 } <<
842 if ( iSamplingCase == 0 ) { <<
843 Mtest1st = MtestHadron; Mmin1st = Mmi <<
844 } else { <<
845 Mtest2nd = MtestHadron; Mmin2nd = Mmi <<
846 } <<
847 } // End for loop on the two sampling cas <<
848 if ( isFirstTarget ) { <<
849 MtestTr = Mtest1st; MtestPr = Mtest2n <<
850 common.MminTarget = Mmin1st; common.Mmi <<
851 } else { <<
852 MtestTr = Mtest2nd; MtestPr = Mtest1s <<
853 common.MminTarget = Mmin2nd; common.Mmi <<
854 } <<
855 <<
856 if ( MtestPr != 0.0 ) { <<
857 common.M0projectile = MtestPr; <<
858 common.M0projectile2 = common.M0projecti <<
859 common.ProjectileDiffStateMinMass = c <<
860 common.ProjectileNonDiffStateMinMass = c <<
861 } <<
862 if ( MtestTr != 0.0 ) { <<
863 common.M0target = MtestTr; <<
864 common.M0target2 = common.M0target * com <<
865 common.TargetDiffStateMinMass = commo <<
866 common.TargetNonDiffStateMinMass = commo <<
867 } <<
868 432
869 } // End of if ( common.absProjectilePDGcod << 433 if( Ksi < 0.333333 )
>> 434 {TargQ1=TargExchangeQ;}
>> 435 else if( (0.333333 <= Ksi) && (Ksi < 0.666667))
>> 436 {TargQ2=TargExchangeQ;}
>> 437 else
>> 438 {TargQ3=TargExchangeQ;}
>> 439
>> 440 } // End of sampling baryon
>> 441
>> 442 NewProjCode = NewNucleonId(ProjQ1, ProjQ2, ProjQ3); // *****************************
>> 443
>> 444 //G4cout<<"ProjQ1, ProjQ2, ProjQ3 "<<ProjQ1<<" "<<ProjQ2<<" "<<ProjQ3<<" "<<NewProjCode<<G4endl;
>> 445
>> 446 G4int TestParticleID=NewProjCode;
>> 447 G4ParticleDefinition* TestParticle=0;
>> 448 G4double TestParticleMass=DBL_MAX;
>> 449
>> 450 TestParticle=G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode);
>> 451 if(TestParticle) TestParticleMass=TestParticle->GetPDGMass();
>> 452
>> 453 if((ProjQ1==ProjQ2) && (ProjQ1==ProjQ3)) {NewProjCode +=2; ProjDeltaHasCreated=true;}
>> 454 else if(projectile->GetDefinition()->GetPDGiIsospin() == 3)// Projectile was Delta
>> 455 { if(G4UniformRand() > DeltaProbAtQuarkExchange)
>> 456 {NewProjCode +=2; ProjDeltaHasCreated=true;}
>> 457 else {NewProjCode +=0; ProjDeltaHasCreated=false;}
>> 458 }
>> 459 else // Projectile was Nucleon
>> 460 {
>> 461 if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS > DeltaMass+M0target))
>> 462 {NewProjCode +=2; ProjDeltaHasCreated=true;}
>> 463 else {NewProjCode +=0; ProjDeltaHasCreated=false;}
>> 464 }
>> 465
>> 466 G4ParticleDefinition* NewTestParticle=
>> 467 G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode);
>> 468 //G4cout<<"TestParticleMass NewTestParticle->GetPDGMass() "<<TestParticleMass<<" "<< NewTestParticle->GetPDGMass()<<G4endl;
>> 469 //if(TestParticleMass < NewTestParticle->GetPDGMass()) {NewProjCode=TestParticleID;}
>> 470
>> 471 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++=
870 472
871 // If we assume that final state hadrons aft << 473 NewTargCode = NewNucleonId(TargQ1, TargQ2, TargQ3); // *****************************
872 // in the ground states, we have to put <<
873 if ( common.SqrtS < common.M0projectile + co <<
874 <<
875 common.PZcms2 = ( sqr( common.S ) + sqr( com <<
876 - 2.0 * ( common.S * ( com <<
877 + common.M0proje <<
878 #ifdef debugFTFexcitation <<
879 G4cout << "At the end// NewProjCode " << New <<
880 << "At the end// NewTargCode " << New <<
881 << "M0pr M0tr SqS " << common.M0pro <<
882 << common.SqrtS << G4endl <<
883 << "M0pr2 M0tr2 SqS " << common.M0pro <<
884 << common.SqrtS << G4endl <<
885 << "PZcms2 after the change " << comm <<
886 #endif <<
887 if ( common.PZcms2 < 0.0 ) return returnCode <<
888 <<
889 projectile->SetDefinition( G4ParticleTable:: <<
890 target->SetDefinition( G4ParticleTable::GetP <<
891 common.PZcms = std::sqrt( common.PZcms2 ); <<
892 common.Pprojectile.setPz( common.PZcms ); <<
893 common.Pprojectile.setE( std::sqrt( common.M <<
894 common.Ptarget.setPz( -common.PZcms ); <<
895 common.Ptarget.setE( std::sqrt( common.M0tar <<
896 #ifdef debugFTFexcitation <<
897 G4cout << "Proj Targ and Proj+Targ in CMS" < <<
898 << common.Ptarget << G4endl << common <<
899 #endif <<
900 <<
901 if ( projectile->GetStatus() != 0 ) projecti <<
902 if ( target->GetStatus() != 0 ) target-> <<
903 <<
904 // Check for possible excitation of the part <<
905 if ( common.SqrtS < common.M0projectile + co <<
906 common.SqrtS < common.ProjectileDiffSta <<
907 common.ProbOfDiffraction == 0.0 ) commo <<
908 <<
909 if ( G4UniformRand() > common.ProbExc ) { / <<
910 #ifdef debugFTFexcitation <<
911 G4cout << "Make elastic scattering of new <<
912 #endif <<
913 common.Pprojectile.transform( common.toLab <<
914 common.Ptarget.transform( common.toLab ); <<
915 projectile->Set4Momentum( common.Pprojecti <<
916 target->Set4Momentum( common.Ptarget ); <<
917 G4bool Result = theElastic->ElasticScatter <<
918 #ifdef debugFTFexcitation <<
919 G4cout << "Result of el. scatt " << Result <<
920 << G4endl << projectile->Get4Moment <<
921 << projectile->Get4Momentum() + tar <<
922 << (projectile->Get4Momentum() + ta <<
923 #endif <<
924 if ( Result ) returnCode = 0; // successf <<
925 return returnCode; <<
926 } <<
927 <<
928 #ifdef debugFTFexcitation <<
929 G4cout << "Make excitation of new hadrons" < <<
930 #endif <<
931 <<
932 // Redefinition of ProbOfDiffraction because <<
933 common.ProbOfDiffraction = common.ProbProjec <<
934 if ( common.ProbOfDiffraction != 0.0 ) { <<
935 common.ProbProjectileDiffraction /= common <<
936 common.ProbTargetDiffraction /= common <<
937 } <<
938 474
939 return returnCode = 1; // successfully comp << 475 //G4cout<<"TargQ1, TargQ2, TargQ3 "<<TargQ1<<" "<<TargQ2<<" "<<TargQ3<<" "<<NewTargCode<<G4endl;
940 } <<
941 476
942 //-------------------------------------------- << 477 TestParticleID=NewTargCode;
943 << 478 TestParticleMass=DBL_MAX;
944 G4bool G4DiffractiveExcitation:: <<
945 ExciteParticipants_doDiffraction( G4VSplitable <<
946 G4FTFParamet <<
947 G4Diffractiv <<
948 // Second of the three utility methods used <<
949 // it does the sampling for the diffraction <<
950 <<
951 G4bool isProjectileDiffraction = false; <<
952 if ( G4UniformRand() < common.ProbProjectile <<
953 isProjectileDiffraction = true; <<
954 #ifdef debugFTFexcitation <<
955 G4cout << "projectile diffraction" << G4en <<
956 #endif <<
957 common.ProjMassT2 = common.ProjectileDiffS <<
958 common.ProjMassT = common.ProjectileDiffS <<
959 common.TargMassT2 = common.M0target2; <<
960 common.TargMassT = common.M0target; <<
961 } else { <<
962 #ifdef debugFTFexcitation <<
963 G4cout << "Target diffraction" << G4endl; <<
964 #endif <<
965 common.ProjMassT2 = common.M0projectile2; <<
966 common.ProjMassT = common.M0projectile; <<
967 common.TargMassT2 = common.TargetDiffState <<
968 common.TargMassT = common.TargetDiffState <<
969 } <<
970 <<
971 // Check whether the interaction is possible <<
972 if ( common.SqrtS < common.ProjMassT + commo <<
973 <<
974 common.PZcms2 = ( sqr( common.S ) + sqr( com <<
975 - 2.0 * ( common.S * ( com <<
976 + common.ProjMassT2 <<
977 if ( common.PZcms2 < 0.0 ) return false; <<
978 common.maxPtSquare = common.PZcms2; <<
979 <<
980 G4double DiffrAveragePt2 = theParameters->Ge <<
981 G4bool loopCondition = true; <<
982 G4int whilecount = 0; <<
983 do { // Generate pt and mass of projectile <<
984 <<
985 whilecount++; <<
986 if ( whilecount > 1000 ) { <<
987 common.Qmomentum = G4LorentzVector( 0.0, <<
988 return false; // Ignore this interacti <<
989 }; <<
990 <<
991 common.Qmomentum = G4LorentzVector( Gaussi <<
992 common.Pt2 = G4ThreeVector( common.Qmoment <<
993 if ( isProjectileDiffraction ) { // proje <<
994 common.ProjMassT2 = common.ProjectileDif <<
995 common.TargMassT2 = common.M0target2 + c <<
996 } else { // targe <<
997 common.ProjMassT2 = common.M0projectile2 <<
998 common.TargMassT2 = common.TargetDiffSta <<
999 } <<
1000 common.ProjMassT = std::sqrt( common.Proj <<
1001 common.TargMassT = std::sqrt( common.Targ <<
1002 if ( common.SqrtS < common.ProjMassT + co <<
1003 <<
1004 common.PZcms2 = ( sqr( common.S ) + sqr( <<
1005 - 2.0 * ( common.S * ( <<
1006 + common.Proj <<
1007 if ( common.PZcms2 < 0.0 ) continue; <<
1008 <<
1009 common.PZcms = std::sqrt( common.PZcms2 ) <<
1010 if ( isProjectileDiffraction ) { // proj <<
1011 common.PMinusMin = std::sqrt( common.Pr <<
1012 common.PMinusMax = common.SqrtS - commo <<
1013 common.PMinusNew = ChooseP( common.PMin <<
1014 common.TMinusNew = common.SqrtS - commo <<
1015 common.Qminus = common.Ptarget.minus() <<
1016 common.TPlusNew = common.TargMassT2 / c <<
1017 common.Qplus = common.Ptarget.plus() - <<
1018 common.Qmomentum.setPz( (common.Qplus - <<
1019 common.Qmomentum.setE( (common.Qplus + <<
1020 loopCondition = ( ( common.Pprojectile <<
1021 common.ProjectileDiff <<
1022 } else { // targ <<
1023 common.TPlusMin = std::sqrt( common.Tar <<
1024 common.TPlusMax = common.SqrtS - common <<
1025 common.TPlusNew = ChooseP( common.TPlus <<
1026 common.PPlusNew = common.SqrtS - common <<
1027 common.Qplus = common.PPlusNew - common <<
1028 common.PMinusNew = common.ProjMassT2 / <<
1029 common.Qminus = common.PMinusNew - comm <<
1030 common.Qmomentum.setPz( (common.Qplus - <<
1031 common.Qmomentum.setE( (common.Qplus + <<
1032 loopCondition = ( ( common.Ptarget - c <<
1033 common.TargetDiffSta <<
1034 } <<
1035 479
1036 } while ( loopCondition ); /* Loop checkin << 480 TestParticle=G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode);
1037 // Repeat the sampling because ther << 481 if(TestParticle) TestParticleMass=TestParticle->GetPDGMass();
>> 482
>> 483 if((TargQ1==TargQ2) && (TargQ1==TargQ3)) {NewTargCode +=2; TargDeltaHasCreated=true;}
>> 484 else if(target->GetDefinition()->GetPDGiIsospin() == 3) // Target was Delta
>> 485 { if(G4UniformRand() > DeltaProbAtQuarkExchange)
>> 486 {NewTargCode +=2; TargDeltaHasCreated=true;}
>> 487 else {NewTargCode +=0; TargDeltaHasCreated=false;}
>> 488 }
>> 489 else // Target was Nucleon
>> 490 {
>> 491 if((G4UniformRand() < DeltaProbAtQuarkExchange) && (SqrtS > M0projectile+DeltaMass))
>> 492 {NewTargCode +=2; TargDeltaHasCreated=true;}
>> 493 else {NewTargCode +=0; TargDeltaHasCreated=false;}
>> 494 }
>> 495
>> 496 NewTestParticle=G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode);
>> 497 //G4cout<<"TestParticleMass NewTestParticle->GetPDGMass() "<<TestParticleMass<<" "<< NewTestParticle->GetPDGMass()<<G4endl;
>> 498 //if(TestParticleMass < NewTestParticle->GetPDGMass()) {NewTargCode=TestParticleID;}
>> 499
>> 500 //G4cout<<"NewProjCode NewTargCode "<<NewProjCode<<" "<<NewTargCode<<G4endl;
>> 501 //G4int Uzhi; G4cin>>Uzhi;
>> 502
>> 503 if((absProjectilePDGcode == NewProjCode) && (absTargetPDGcode == NewTargCode))
>> 504 { // Nothing was changed! It is not right!?
>> 505 }
>> 506 // Forming baryons --------------------------------------------------
>> 507 if(ProjDeltaHasCreated) {ProbProjectileDiffraction=1.; ProbTargetDiffraction=0.;}
>> 508 if(TargDeltaHasCreated) {ProbProjectileDiffraction=0.; ProbTargetDiffraction=1.;}
>> 509 if(ProjDeltaHasCreated)
>> 510 {
>> 511 M0projectile=
>> 512 (G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode))->GetPDGMass();
>> 513 M0projectile2 = M0projectile * M0projectile;
>> 514
>> 515 ProjectileDiffStateMinMass =M0projectile+210.*MeV; //210 MeV=m_pi+70 MeV
>> 516 ProjectileNonDiffStateMinMass=M0projectile+210.*MeV; //210 MeV=m_pi+70 MeV
>> 517 }
>> 518
>> 519 // if(M0target <
>> 520 // (G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode))->GetPDGMass())
>> 521 if(TargDeltaHasCreated)
>> 522 {
>> 523 M0target=
>> 524 (G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode))->GetPDGMass();
>> 525 M0target2 = M0target * M0target;
>> 526
>> 527 TargetDiffStateMinMass =M0target+210.*MeV; //210 MeV=m_pi+70 MeV;
>> 528 TargetNonDiffStateMinMass=M0target+210.*MeV; //210 MeV=m_pi+70 MeV;
>> 529 }
>> 530 } // End of if projectile is baryon ---------------------------
>> 531
>> 532 //G4cout<<"At end// NewProjCode "<<NewProjCode<<G4endl;
>> 533 //G4cout<<"At end// NewTargCode "<<NewTargCode<<G4endl;
>> 534
>> 535 // If we assume that final state hadrons after the charge exchange will be
>> 536 // in the ground states, we have to put ----------------------------------
>> 537 //G4cout<<"M0pr M0tr SqS "<<M0projectile<<" "<<M0target<<" "<<SqrtS<<G4endl;
>> 538
>> 539 PZcms2=(S*S+M0projectile2*M0projectile2+M0target2*M0target2-
>> 540 2*S*M0projectile2 - 2*S*M0target2 - 2*M0projectile2*M0target2)
>> 541 /4./S;
>> 542 //G4cout<<"PZcms2 1 "<<PZcms2<<G4endl<<G4endl;
>> 543 if(PZcms2 < 0) {return false;} // It can be if energy is not sufficient for Delta
>> 544 //----------------------------------------------------------
>> 545 projectile->SetDefinition(
>> 546 G4ParticleTable::GetParticleTable()->FindParticle(NewProjCode));
>> 547
>> 548 target->SetDefinition(
>> 549 G4ParticleTable::GetParticleTable()->FindParticle(NewTargCode));
>> 550 //----------------------------------------------------------
>> 551 PZcms = std::sqrt(PZcms2);
>> 552
>> 553 Pprojectile.setPz( PZcms);
>> 554 Pprojectile.setE(std::sqrt(M0projectile2+PZcms2));
>> 555
>> 556 Ptarget.setPz( -PZcms);
>> 557 Ptarget.setE(std::sqrt(M0target2+PZcms2));
>> 558
>> 559 // ----------------------------------------------------------
>> 560
>> 561 if(absProjectilePDGcode < 1000)
>> 562 { // For projectile meson
>> 563 G4double Wexcit=1.-2.256*std::exp(-0.6*ProjectileRapidity);
>> 564 Wexcit=0.;
>> 565 if(G4UniformRand() > Wexcit)
>> 566 { // Make elastic scattering
>> 567 //G4cout<<"Make elastic scattering of new hadrons"<<G4endl;
>> 568 Pprojectile.transform(toLab);
>> 569 Ptarget.transform(toLab);
>> 570
>> 571 projectile->SetTimeOfCreation(target->GetTimeOfCreation());
>> 572 projectile->SetPosition(target->GetPosition());
>> 573
>> 574 projectile->Set4Momentum(Pprojectile);
>> 575 target->Set4Momentum(Ptarget);
>> 576
>> 577 G4bool Result= theElastic->ElasticScattering (projectile,target,theParameters);
>> 578 return Result;
>> 579 } // end of if(Make elastic scattering for projectile meson?)
>> 580 } else
>> 581 { // For projectile baryon
>> 582 G4double Wexcit=1.-2.256*std::exp(-0.6*ProjectileRapidity);
>> 583 //Wexcit=0.;
>> 584 if(G4UniformRand() > Wexcit)
>> 585 { // Make elastic scattering
>> 586 //G4cout<<"Make elastic scattering of new hadrons"<<G4endl;
>> 587 Pprojectile.transform(toLab);
>> 588 Ptarget.transform(toLab);
>> 589
>> 590 projectile->SetTimeOfCreation(target->GetTimeOfCreation());
>> 591 projectile->SetPosition(target->GetPosition());
>> 592
>> 593 projectile->Set4Momentum(Pprojectile);
>> 594 target->Set4Momentum(Ptarget);
>> 595
>> 596 G4bool Result= theElastic->ElasticScattering (projectile,target,theParameters);
>> 597 return Result;
>> 598 } // end of if(Make elastic scattering for projectile baryon?)
>> 599 }
>> 600 //G4cout<<"Make excitation of new hadrons"<<G4endl;
>> 601 } // End of charge exchange part ------------------------------
>> 602
>> 603 // ------------------------------------------------------------------
>> 604 G4double ProbOfDiffraction=ProbProjectileDiffraction + ProbTargetDiffraction;
>> 605 /*
>> 606 G4cout<<"Excite --------------------"<<G4endl;
>> 607 G4cout<<"Proj "<<M0projectile<<" "<<ProjectileDiffStateMinMass<<" "<<ProjectileNonDiffStateMinMass<<G4endl;
>> 608 G4cout<<"Targ "<<M0target <<" "<<TargetDiffStateMinMass <<" "<<TargetNonDiffStateMinMass<<G4endl;
>> 609 G4cout<<"SqrtS "<<SqrtS<<G4endl;
>> 610
>> 611 G4cout<<"Prob ProjDiff TargDiff "<<ProbProjectileDiffraction<<" "<<ProbTargetDiffraction<<" "<<ProbOfDiffraction<<G4endl;
>> 612 G4cout<<"Pr Y "<<Pprojectile.rapidity()<<" Tr Y "<<Ptarget.rapidity()<<G4endl;
>> 613 G4int Uzhi; G4cin>>Uzhi;
>> 614 */
>> 615 /*
>> 616 if(ProjectileNonDiffStateMinMass + TargetNonDiffStateMinMass > SqrtS) // 24.07.10
>> 617 {
>> 618 if(ProbOfDiffraction!=0.)
>> 619 {
>> 620 ProbProjectileDiffraction/=ProbOfDiffraction;
>> 621 ProbOfDiffraction=1.;
>> 622 } else {return false;}
>> 623 }
>> 624
>> 625 */
>> 626
>> 627 if(ProbOfDiffraction!=0.)
>> 628 {
>> 629 ProbProjectileDiffraction/=ProbOfDiffraction;
>> 630 }
>> 631 else
>> 632 {
>> 633 ProbProjectileDiffraction=0.;
>> 634 }
>> 635
>> 636 //G4cout<<"Prob ProjDiff TargDiff "<<ProbProjectileDiffraction<<" "<<ProbTargetDiffraction<<" "<<ProbOfDiffraction<<G4endl;
>> 637
>> 638 G4double ProjectileDiffStateMinMass2 = ProjectileDiffStateMinMass *
>> 639 ProjectileDiffStateMinMass;
>> 640 G4double ProjectileNonDiffStateMinMass2 = ProjectileNonDiffStateMinMass *
>> 641 ProjectileNonDiffStateMinMass;
>> 642
>> 643 G4double TargetDiffStateMinMass2 = TargetDiffStateMinMass *
>> 644 TargetDiffStateMinMass;
>> 645 G4double TargetNonDiffStateMinMass2 = TargetNonDiffStateMinMass *
>> 646 TargetNonDiffStateMinMass;
>> 647
>> 648 G4double Pt2;
>> 649 G4double ProjMassT2, ProjMassT;
>> 650 G4double TargMassT2, TargMassT;
>> 651 G4double PMinusMin, PMinusMax;
>> 652 // G4double PPlusMin , PPlusMax;
>> 653 G4double TPlusMin , TPlusMax;
>> 654 G4double PMinusNew, PPlusNew, TPlusNew, TMinusNew;
>> 655
>> 656 G4LorentzVector Qmomentum;
>> 657 G4double Qminus, Qplus;
>> 658
>> 659 G4int whilecount=0;
>> 660
>> 661 // Choose a process ---------------------------
>> 662
>> 663 if(G4UniformRand() < ProbOfDiffraction)
>> 664 {
>> 665 if(G4UniformRand() < ProbProjectileDiffraction)
>> 666 { //-------- projectile diffraction ---------------
>> 667 //G4cout<<"projectile diffraction"<<G4endl;
>> 668
>> 669 do {
>> 670 // Generate pt
>> 671 // if (whilecount++ >= 500 && (whilecount%100)==0)
>> 672 // G4cout << "G4DiffractiveExcitation::ExciteParticipants possibly looping"
>> 673 // << ", loop count/ maxPtSquare : "
>> 674 // << whilecount << " / " << maxPtSquare << G4endl;
>> 675
>> 676 // whilecount++;
>> 677 if (whilecount > 1000 )
>> 678 {
>> 679 Qmomentum=G4LorentzVector(0.,0.,0.,0.);
>> 680 target->SetStatus(2); return false; // Ignore this interaction
>> 681 };
>> 682
>> 683 // --------------- Check that the interaction is possible -----------
>> 684 ProjMassT2=ProjectileDiffStateMinMass2;
>> 685 ProjMassT =ProjectileDiffStateMinMass;
>> 686
>> 687 TargMassT2=M0target2;
>> 688 TargMassT =M0target;
>> 689 //G4cout<<"Masses "<<ProjMassT<<" "<<TargMassT<<" "<<SqrtS<<" "<<ProjMassT+TargMassT<<G4endl;
>> 690 PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2-
>> 691 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2)
>> 692 /4./S;
>> 693
>> 694 //G4cout<<"PZcms2 PrD"<<PZcms2<<G4endl;
>> 695 if(PZcms2 < 0 )
>> 696 {
>> 697 target->SetStatus(2);
>> 698 return false;
>> 699 }
>> 700 maxPtSquare=PZcms2;
>> 701
>> 702 Qmomentum=G4LorentzVector(GaussianPt(AveragePt2,maxPtSquare),0);
>> 703 Pt2=G4ThreeVector(Qmomentum.vect()).mag2();
>> 704
>> 705 ProjMassT2=ProjectileDiffStateMinMass2+Pt2;
>> 706 ProjMassT =std::sqrt(ProjMassT2);
>> 707
>> 708 TargMassT2=M0target2+Pt2;
>> 709 TargMassT =std::sqrt(TargMassT2);
>> 710
>> 711 PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2-
>> 712 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2)
>> 713 /4./S;
>> 714
>> 715 if(PZcms2 < 0 ) continue;
>> 716 PZcms =std::sqrt(PZcms2);
>> 717
>> 718 PMinusMin=std::sqrt(ProjMassT2+PZcms2)-PZcms;
>> 719 PMinusMax=SqrtS-TargMassT;
>> 720
>> 721 PMinusNew=ChooseP(PMinusMin, PMinusMax);
>> 722 // PMinusNew=1./sqrt(1./PMinusMin-G4UniformRand()*(1./PMinusMin-1./PMinusMax));
>> 723 //PMinusNew=1./sqr(1./std::sqrt(PMinusMin)-G4UniformRand()*(1./std::sqrt(PMinusMin)-1./std::sqrt(PMinusMax)));
>> 724
>> 725 TMinusNew=SqrtS-PMinusNew;
>> 726 Qminus=Ptarget.minus()-TMinusNew;
>> 727 TPlusNew=TargMassT2/TMinusNew;
>> 728 Qplus=Ptarget.plus()-TPlusNew;
>> 729
>> 730 Qmomentum.setPz( (Qplus-Qminus)/2 );
>> 731 Qmomentum.setE( (Qplus+Qminus)/2 );
>> 732
>> 733 } while ((Pprojectile+Qmomentum).mag2() < ProjectileDiffStateMinMass2); //||
>> 734 //Repeat the sampling because there was not any excitation
>> 735 //((Ptarget -Qmomentum).mag2() < M0target2 )) );
>> 736 }
>> 737 else
>> 738 { // -------------- Target diffraction ----------------
1038 739
1039 if ( isProjectileDiffraction ) { // projec << 740 //G4cout<<"Target diffraction"<<G4endl;
1040 projectile->SetStatus( 0 ); << 741 do {
1041 if ( projectile->GetStatus() == 2 ) proje << 742 // Generate pt
1042 if ( target->GetStatus() == 1 && target << 743 // if (whilecount++ >= 500 && (whilecount%100)==0)
1043 } else { // target << 744 // G4cout << "G4DiffractiveExcitation::ExciteParticipants possibly looping"
1044 target->SetStatus( 0 ); << 745 // << ", loop count/ maxPtSquare : "
1045 } << 746 // << whilecount << " / " << maxPtSquare << G4endl;
>> 747
>> 748 // whilecount++;
>> 749 if (whilecount > 1000 )
>> 750 {
>> 751 Qmomentum=G4LorentzVector(0.,0.,0.,0.);
>> 752 target->SetStatus(2); return false; // Ignore this interaction
>> 753 };
>> 754 //G4cout<<"Qm while "<<Qmomentum<<" "<<whilecount<<G4endl;
>> 755 // --------------- Check that the interaction is possible -----------
>> 756 ProjMassT2=M0projectile2;
>> 757 ProjMassT =M0projectile;
>> 758
>> 759 TargMassT2=TargetDiffStateMinMass2;
>> 760 TargMassT =TargetDiffStateMinMass;
>> 761
>> 762 PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2-
>> 763 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2)
>> 764 /4./S;
>> 765
>> 766 //G4cout<<"PZcms2 TrD <0 "<<PZcms2<<" return"<<G4endl;
>> 767 if(PZcms2 < 0 )
>> 768 {
>> 769 target->SetStatus(2);
>> 770 return false;
>> 771 }
>> 772 maxPtSquare=PZcms2;
>> 773
>> 774 Qmomentum=G4LorentzVector(GaussianPt(AveragePt2,maxPtSquare),0);
>> 775
>> 776 //G4cout<<"Qm while "<<Qmomentum<<" "<<whilecount<<G4endl;
>> 777 Pt2=G4ThreeVector(Qmomentum.vect()).mag2();
>> 778
>> 779 ProjMassT2=M0projectile2+Pt2;
>> 780 ProjMassT =std::sqrt(ProjMassT2);
>> 781
>> 782 TargMassT2=TargetDiffStateMinMass2+Pt2;
>> 783 TargMassT =std::sqrt(TargMassT2);
>> 784
>> 785 PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2-
>> 786 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2)
>> 787 /4./S;
>> 788
>> 789 //G4cout<<"PZcms2 <0 "<<PZcms2<<" continue"<<G4endl;
>> 790 if(PZcms2 < 0 ) continue;
>> 791 PZcms =std::sqrt(PZcms2);
>> 792
>> 793 TPlusMin=std::sqrt(TargMassT2+PZcms2)-PZcms;
>> 794 TPlusMax=SqrtS-ProjMassT;
>> 795
>> 796 TPlusNew=ChooseP(TPlusMin, TPlusMax);
>> 797 //TPlusNew=1./sqr(1./std::sqrt(TPlusMin)-G4UniformRand()*(1./std::sqrt(TPlusMin)-1./std::sqrt(TPlusMax)));
>> 798
>> 799 //TPlusNew=TPlusMax;
>> 800
>> 801 PPlusNew=SqrtS-TPlusNew;
>> 802 Qplus=PPlusNew-Pprojectile.plus();
>> 803 PMinusNew=ProjMassT2/PPlusNew;
>> 804 Qminus=PMinusNew-Pprojectile.minus();
>> 805
>> 806 Qmomentum.setPz( (Qplus-Qminus)/2 );
>> 807 Qmomentum.setE( (Qplus+Qminus)/2 );
>> 808
>> 809 /*
>> 810 G4cout<<(Pprojectile+Qmomentum).mag()<<" "<<M0projectile<<G4endl;
>> 811 G4bool First=(Pprojectile+Qmomentum).mag2() < M0projectile2;
>> 812 G4cout<<First<<G4endl;
>> 813
>> 814 G4cout<<(Ptarget -Qmomentum).mag()<<" "<<TargetDiffStateMinMass<<" "<<TargetDiffStateMinMass2<<G4endl;
>> 815 G4bool Seco=(Ptarget -Qmomentum).mag2() < TargetDiffStateMinMass2;
>> 816 G4cout<<Seco<<G4endl;
>> 817 */
>> 818
>> 819 } while ((Ptarget -Qmomentum).mag2() < TargetDiffStateMinMass2);
>> 820 // Repeat the sampling because there was not any excitation
>> 821 // (((Pprojectile+Qmomentum).mag2() < M0projectile2 ) || //No without excitation
>> 822 // ((Ptarget -Qmomentum).mag2() < TargetDiffStateMinMass2)) );
>> 823 //G4cout<<"Go out"<<G4endl;
>> 824 } // End of if(G4UniformRand() < ProbProjectileDiffraction)
>> 825 }
>> 826 else //----------- Non-diffraction process ------------
>> 827 {
1046 828
1047 return true; << 829 //G4cout<<"Non-diffraction process"<<G4endl;
1048 } << 830 do {
1049 << 831 // Generate pt
1050 //------------------------------------------- << 832 // if (whilecount++ >= 500 && (whilecount%100)==0)
>> 833 // G4cout << "G4DiffractiveExcitation::ExciteParticipants possibly looping"
>> 834 // << ", loop count/ maxPtSquare : "
>> 835 // << whilecount << " / " << maxPtSquare << G4endl;
>> 836
>> 837 // whilecount++;
>> 838 if (whilecount > 1000 )
>> 839 {
>> 840 Qmomentum=G4LorentzVector(0.,0.,0.,0.);
>> 841 target->SetStatus(2); return false; // Ignore this interaction
>> 842 };
>> 843 // --------------- Check that the interaction is possible -----------
>> 844 ProjMassT2=ProjectileNonDiffStateMinMass2;
>> 845 ProjMassT =ProjectileNonDiffStateMinMass;
>> 846
>> 847 TargMassT2=TargetNonDiffStateMinMass2;
>> 848 TargMassT =TargetNonDiffStateMinMass;
>> 849
>> 850 PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2-
>> 851 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2)
>> 852 /4./S;
>> 853
>> 854 if(PZcms2 < 0 )
>> 855 {
>> 856 target->SetStatus(2);
>> 857 return false;
>> 858 }
>> 859 maxPtSquare=PZcms2;
>> 860 Qmomentum=G4LorentzVector(GaussianPt(AveragePt2,maxPtSquare),0);
>> 861 Pt2=G4ThreeVector(Qmomentum.vect()).mag2();
>> 862
>> 863 ProjMassT2=ProjectileNonDiffStateMinMass2+Pt2;
>> 864 ProjMassT =std::sqrt(ProjMassT2);
>> 865
>> 866 TargMassT2=TargetNonDiffStateMinMass2+Pt2;
>> 867 TargMassT =std::sqrt(TargMassT2);
>> 868
>> 869 PZcms2=(S*S + ProjMassT2*ProjMassT2 + TargMassT2*TargMassT2-
>> 870 2.*S*ProjMassT2-2.*S*TargMassT2-2.*ProjMassT2*TargMassT2)
>> 871 /4./S;
>> 872 //G4cout<<"PZcms2 ND"<<PZcms2<<G4endl;
>> 873
>> 874 if(PZcms2 < 0 ) continue;
>> 875 PZcms =std::sqrt(PZcms2);
>> 876
>> 877 PMinusMin=std::sqrt(ProjMassT2+PZcms2)-PZcms;
>> 878 PMinusMax=SqrtS-TargMassT;
>> 879
>> 880 PMinusNew=ChooseP(PMinusMin, PMinusMax);
>> 881
>> 882 Qminus=PMinusNew-Pprojectile.minus();
>> 883
>> 884 TPlusMin=std::sqrt(TargMassT2+PZcms2)-PZcms;
>> 885 // TPlusMax=SqrtS-PMinusNew;
>> 886 TPlusMax=SqrtS-ProjMassT;
>> 887
>> 888 TPlusNew=ChooseP(TPlusMin, TPlusMax);
>> 889
>> 890 Qplus=-(TPlusNew-Ptarget.plus());
>> 891
>> 892 Qmomentum.setPz( (Qplus-Qminus)/2 );
>> 893 Qmomentum.setE( (Qplus+Qminus)/2 );
>> 894 /*
>> 895 G4cout<<(Pprojectile+Qmomentum).mag2()<<" "<<ProjectileNonDiffStateMinMass2<<G4endl;
>> 896 G4cout<<(Ptarget -Qmomentum).mag2()<<" "<<TargetNonDiffStateMinMass2<<G4endl;
>> 897 G4int Uzhi; G4cin>>Uzhi;
>> 898 */
>> 899 } while (
>> 900 ((Pprojectile+Qmomentum).mag2() < ProjectileNonDiffStateMinMass2) || //No double Diffraction
>> 901 ((Ptarget -Qmomentum).mag2() < TargetNonDiffStateMinMass2 ));
>> 902 }
>> 903
>> 904 Pprojectile += Qmomentum;
>> 905 Ptarget -= Qmomentum;
>> 906
>> 907 //G4cout<<"Pr Y "<<Pprojectile.rapidity()<<" Tr Y "<<Ptarget.rapidity()<<G4endl;
>> 908
>> 909 // Transform back and update SplitableHadron Participant.
>> 910 Pprojectile.transform(toLab);
>> 911 Ptarget.transform(toLab);
>> 912
>> 913 // Calculation of the creation time ---------------------
>> 914 projectile->SetTimeOfCreation(target->GetTimeOfCreation());
>> 915 projectile->SetPosition(target->GetPosition());
>> 916 // Creation time and position of target nucleon were determined at
>> 917 // ReggeonCascade() of G4FTFModel
>> 918 // ------------------------------------------------------
>> 919
>> 920 //G4cout<<"Mproj "<<Pprojectile.mag()<<G4endl;
>> 921 //G4cout<<"Mtarg "<<Ptarget.mag()<<G4endl;
>> 922 projectile->Set4Momentum(Pprojectile);
>> 923 target->Set4Momentum(Ptarget);
1051 924
1052 G4bool G4DiffractiveExcitation:: << 925 projectile->IncrementCollisionCount(1);
1053 ExciteParticipants_doNonDiffraction( G4VSplit << 926 target->IncrementCollisionCount(1);
1054 G4VSplit <<
1055 G4FTFPar <<
1056 G4Diffra <<
1057 // Third of the three utility methods used <<
1058 // it does the sampling for the non-diffrac <<
1059 <<
1060 #ifdef debugFTFexcitation <<
1061 G4cout << "Non-diffraction process" << G4en <<
1062 #endif <<
1063 <<
1064 // Check whether the interaction is possibl <<
1065 common.ProjMassT2 = common.ProjectileNonDif <<
1066 common.ProjMassT = common.ProjectileNonDif <<
1067 common.TargMassT2 = common.TargetNonDiffSta <<
1068 common.TargMassT = common.TargetNonDiffSta <<
1069 if ( common.SqrtS < common.ProjMassT + comm <<
1070 <<
1071 common.PZcms2 = ( sqr( common.S ) + sqr( co <<
1072 - 2.0 * ( common.S * ( comm <<
1073 + common.ProjMassT2 * <<
1074 common.maxPtSquare = common.PZcms2; <<
1075 <<
1076 G4int whilecount = 0; <<
1077 do { // Generate pt and masses <<
1078 <<
1079 whilecount++; <<
1080 if ( whilecount > 1000 ) { <<
1081 common.Qmomentum = G4LorentzVector( 0.0 <<
1082 return false; // Ignore this interacti <<
1083 }; <<
1084 <<
1085 common.Qmomentum = G4LorentzVector( Gauss <<
1086 <<
1087 common.Pt2 = G4ThreeVector( common.Qmomen <<
1088 common.ProjMassT2 = common.ProjectileNonD <<
1089 common.ProjMassT = std::sqrt( common.Pro <<
1090 common.TargMassT2 = common.TargetNonDiffS <<
1091 common.TargMassT = std::sqrt( common.Tar <<
1092 if ( common.SqrtS < common.ProjMassT + co <<
1093 <<
1094 common.PZcms2 =( sqr( common.S ) + sqr( c <<
1095 - 2.0 * ( common.S * ( c <<
1096 + common.ProjM <<
1097 if ( common.PZcms2 < 0.0 ) continue; <<
1098 <<
1099 common.PZcms = std::sqrt( common.PZcms2 ) <<
1100 common.PMinusMin = std::sqrt( common.Proj <<
1101 common.PMinusMax = common.SqrtS - common. <<
1102 common.TPlusMin = std::sqrt( common.TargM <<
1103 common.TPlusMax = common.SqrtS - common.P <<
1104 <<
1105 if ( G4UniformRand() <= 0.5 ) { // Rando <<
1106 if ( G4UniformRand() < theParameters->G <<
1107 common.PMinusNew = ChooseP( common.PM <<
1108 } else { <<
1109 common.PMinusNew = ( common.PMinusMax <<
1110 } <<
1111 if ( G4UniformRand() < theParameters->G <<
1112 common.TPlusNew = ChooseP( common.TPl <<
1113 } else { <<
1114 common.TPlusNew = ( common.TPlusMax - <<
1115 } <<
1116 } else { <<
1117 if ( G4UniformRand() < theParameters->G <<
1118 common.TPlusNew = ChooseP( common.TPl <<
1119 } else { <<
1120 common.TPlusNew = ( common.TPlusMax - <<
1121 } <<
1122 if ( G4UniformRand() < theParameters->G <<
1123 common.PMinusNew = ChooseP( common.PM <<
1124 } else { <<
1125 common.PMinusNew = ( common.PMinusMax <<
1126 } <<
1127 } <<
1128 927
1129 common.Qminus = common.PMinusNew - common << 928 return true;
1130 common.Qplus = -( common.TPlusNew - commo <<
1131 common.Qmomentum.setPz( (common.Qplus - c <<
1132 common.Qmomentum.setE( (common.Qplus + c <<
1133 #ifdef debugFTFexcitation <<
1134 G4cout <<"Sampled: Mpr, MdifPr, Mtr, Mdif <<
1135 << ( common.Pprojectile + common.Q <<
1136 << common.ProjectileNonDiffStateMi <<
1137 << ( common.Ptarget - common.Qmome <<
1138 << common.TargetNonDiffStateMinMas <<
1139 #endif <<
1140 <<
1141 } while ( ( common.Pprojectile + common.Qmo <<
1142 common.ProjectileNonDiffStateMinM <<
1143 ( common.Ptarget - common.Qmoment <<
1144 common.TargetNonDiffStateMinMass2 <<
1145 <<
1146 projectile->SetStatus( 0 ); <<
1147 target->SetStatus( 0 ); <<
1148 return true; <<
1149 } 929 }
1150 930
>> 931 // ---------------------------------------------------------------------
>> 932 void G4DiffractiveExcitation::CreateStrings(G4VSplitableHadron * hadron,
>> 933 G4bool isProjectile,
>> 934 G4ExcitedString * &FirstString,
>> 935 G4ExcitedString * &SecondString,
>> 936 G4FTFParameters *theParameters) const
>> 937 {
>> 938 hadron->SplitUp();
>> 939 G4Parton *start= hadron->GetNextParton();
>> 940 if ( start==NULL)
>> 941 { G4cout << " G4FTFModel::String() Error:No start parton found"<< G4endl;
>> 942 FirstString=0; SecondString=0;
>> 943 return;
>> 944 }
>> 945 G4Parton *end = hadron->GetNextParton();
>> 946 if ( end==NULL)
>> 947 { G4cout << " G4FTFModel::String() Error:No end parton found"<< G4endl;
>> 948 FirstString=0; SecondString=0;
>> 949 return;
>> 950 }
>> 951
>> 952 G4LorentzVector Phadron=hadron->Get4Momentum();
>> 953
>> 954 G4LorentzVector Pstart(0.,0.,0.,0.);
>> 955 G4LorentzVector Pend(0.,0.,0.,0.);
>> 956 G4LorentzVector Pkink(0.,0.,0.,0.);
>> 957 G4LorentzVector PkinkQ1(0.,0.,0.,0.);
>> 958 G4LorentzVector PkinkQ2(0.,0.,0.,0.);
>> 959
>> 960 G4int PDGcode_startQ = std::abs(start->GetDefinition()->GetPDGEncoding());
>> 961 G4int PDGcode_endQ = std::abs( end->GetDefinition()->GetPDGEncoding());
>> 962
>> 963 //--------------------------------------------------------------------------------
>> 964 G4double Wmin(0.);
>> 965 if(isProjectile)
>> 966 {
>> 967 Wmin=theParameters->GetProjMinDiffMass();
>> 968 } else
>> 969 {
>> 970 Wmin=theParameters->GetTarMinDiffMass();
>> 971 } // end of if(isProjectile)
>> 972
>> 973 G4double W = hadron->Get4Momentum().mag();
>> 974 G4double W2=W*W;
>> 975
>> 976 G4double Pt(0.), x1(0.), x2(0.), x3(0.);
>> 977 G4bool Kink=false;
>> 978
>> 979 if(W > Wmin)
>> 980 { // Kink is possible
>> 981 G4double Pt2kink=theParameters->GetPt2Kink();
>> 982 Pt = std::sqrt(Pt2kink*(std::pow(W2/16./Pt2kink+1.,G4UniformRand()) - 1.));
>> 983
>> 984 if(Pt > 500.*MeV)
>> 985 {
>> 986 G4double Ymax = std::log(W/2./Pt + std::sqrt(W2/4./Pt/Pt - 1.));
>> 987 G4double Y=Ymax*(1.- 2.*G4UniformRand());
>> 988
>> 989 x1=1.-Pt/W*std::exp( Y);
>> 990 x3=1.-Pt/W*std::exp(-Y);
>> 991 x2=2.-x1-x3;
>> 992
>> 993 G4double Mass_startQ = 650.*MeV;
>> 994 if(PDGcode_startQ < 3) Mass_startQ = 325.*MeV;
>> 995 if(PDGcode_startQ == 3) Mass_startQ = 500.*MeV;
>> 996 if(PDGcode_startQ == 4) Mass_startQ = 1600.*MeV;
>> 997
>> 998 G4double Mass_endQ = 650.*MeV;
>> 999 if(PDGcode_endQ < 3) Mass_endQ = 325.*MeV;
>> 1000 if(PDGcode_endQ == 3) Mass_endQ = 500.*MeV;
>> 1001 if(PDGcode_endQ == 4) Mass_endQ = 1600.*MeV;
>> 1002
>> 1003 G4double P2_1=W2*x1*x1/4.-Mass_endQ *Mass_endQ;
>> 1004 G4double P2_3=W2*x3*x3/4.-Mass_startQ*Mass_startQ;
>> 1005
>> 1006 G4double P2_2=sqr((2.-x1-x3)*W/2.);
>> 1007
>> 1008 if((P2_1 <= 0.) || (P2_3 <= 0.))
>> 1009 { Kink=false;}
>> 1010 else
>> 1011 {
>> 1012 G4double P_1=std::sqrt(P2_1);
>> 1013 G4double P_2=std::sqrt(P2_2);
>> 1014 G4double P_3=std::sqrt(P2_3);
>> 1015
>> 1016 G4double CosT12=(P2_3-P2_1-P2_2)/(2.*P_1*P_2);
>> 1017 G4double CosT13=(P2_2-P2_1-P2_3)/(2.*P_1*P_3);
>> 1018 // Pt=P_2*std::sqrt(1.-CosT12*CosT12); // because system was rotated 11.12.09
>> 1019
>> 1020 if((std::abs(CosT12) >1.) || (std::abs(CosT13) > 1.))
>> 1021 { Kink=false;}
>> 1022 else
>> 1023 {
>> 1024 Kink=true;
>> 1025 Pt=P_2*std::sqrt(1.-CosT12*CosT12); // because system was rotated 11.12.09
>> 1026 Pstart.setPx(-Pt); Pstart.setPy(0.); Pstart.setPz(P_3*CosT13);
>> 1027 Pend.setPx( 0.); Pend.setPy( 0.); Pend.setPz( P_1);
>> 1028 Pkink.setPx( Pt); Pkink.setPy( 0.); Pkink.setPz( P_2*CosT12);
>> 1029 Pstart.setE(x3*W/2.);
>> 1030 Pkink.setE(Pkink.vect().mag());
>> 1031 Pend.setE(x1*W/2.);
>> 1032
>> 1033 G4double XkQ=GetQuarkFractionOfKink(0.,1.);
>> 1034 if(Pkink.getZ() > 0.)
>> 1035 {
>> 1036 if(XkQ > 0.5) {PkinkQ1=XkQ*Pkink;} else {PkinkQ1=(1.-XkQ)*Pkink;}
>> 1037 } else {
>> 1038 if(XkQ > 0.5) {PkinkQ1=(1.-XkQ)*Pkink;} else {PkinkQ1=XkQ*Pkink;}
>> 1039 }
>> 1040
>> 1041 PkinkQ2=Pkink - PkinkQ1;
>> 1042 //------------------------- Minimizing Pt1^2+Pt3^2 ------------------------------
>> 1043
>> 1044 G4double Cos2Psi=(sqr(x1) -sqr(x3)+2.*sqr(x3*CosT13))/
>> 1045 std::sqrt(sqr(sqr(x1)-sqr(x3)) + sqr(2.*x1*x3*CosT13));
>> 1046 G4double Psi=std::acos(Cos2Psi);
>> 1047
>> 1048 G4LorentzRotation Rotate;
>> 1049 if(isProjectile) {Rotate.rotateY(Psi);}
>> 1050 else {Rotate.rotateY(pi-Psi);}
>> 1051 Rotate.rotateZ(twopi*G4UniformRand());
>> 1052
>> 1053 Pstart*=Rotate;
>> 1054 Pkink*=Rotate;
>> 1055 PkinkQ1*=Rotate;
>> 1056 PkinkQ2*=Rotate;
>> 1057 Pend*=Rotate;
>> 1058
>> 1059 }
>> 1060 } // end of if((P2_1 < 0.) || (P2_3 <0.))
>> 1061 } // end of if(Pt > 500.*MeV)
>> 1062 } // end of if(W > Wmin) Check for a kink
>> 1063
>> 1064 //--------------------------------------------------------------------------------
>> 1065
>> 1066 if(Kink)
>> 1067 { // Kink is possible
>> 1068 std::vector<G4double> QuarkProbabilitiesAtGluonSplitUp =
>> 1069 theParameters->GetQuarkProbabilitiesAtGluonSplitUp();
>> 1070
>> 1071 G4int QuarkInGluon(1); G4double Ksi=G4UniformRand();
>> 1072 for(unsigned int Iq=0; Iq <3; Iq++)
>> 1073 {
>> 1074
>> 1075 if(Ksi > QuarkProbabilitiesAtGluonSplitUp[Iq]) QuarkInGluon++;}
>> 1076
>> 1077 G4Parton * Gquark = new G4Parton(QuarkInGluon);
>> 1078 G4Parton * Ganti_quark = new G4Parton(-QuarkInGluon);
>> 1079
>> 1080 //-------------------------------------------------------------------------------
>> 1081 G4LorentzRotation toCMS(-1*Phadron.boostVector());
>> 1082
>> 1083 G4LorentzRotation toLab(toCMS.inverse());
>> 1084
>> 1085 Pstart.transform(toLab); start->Set4Momentum(Pstart);
>> 1086 PkinkQ1.transform(toLab);
>> 1087 PkinkQ2.transform(toLab);
>> 1088 Pend.transform(toLab); end->Set4Momentum(Pend);
>> 1089
>> 1090 G4int absPDGcode=std::abs(hadron->GetDefinition()->GetPDGEncoding());
>> 1091
>> 1092 if(absPDGcode < 1000)
>> 1093 { // meson
>> 1094 if ( isProjectile )
>> 1095 { // Projectile
>> 1096 if(end->GetDefinition()->GetPDGEncoding() > 0 ) // A quark on the end
>> 1097 { // Quark on the end
>> 1098 FirstString = new G4ExcitedString(end ,Ganti_quark, +1);
>> 1099 SecondString= new G4ExcitedString(Gquark,start ,+1);
>> 1100 Ganti_quark->Set4Momentum(PkinkQ1);
>> 1101 Gquark->Set4Momentum(PkinkQ2);
>> 1102
>> 1103 } else
>> 1104 { // Anti_Quark on the end
>> 1105 FirstString = new G4ExcitedString(end ,Gquark, +1);
>> 1106 SecondString= new G4ExcitedString(Ganti_quark,start ,+1);
>> 1107 Gquark->Set4Momentum(PkinkQ1);
>> 1108 Ganti_quark->Set4Momentum(PkinkQ2);
>> 1109
>> 1110 } // end of if(end->GetPDGcode() > 0)
>> 1111 } else { // Target
>> 1112 if(end->GetDefinition()->GetPDGEncoding() > 0 ) // A quark on the end
>> 1113 { // Quark on the end
>> 1114 FirstString = new G4ExcitedString(Ganti_quark,end ,-1);
>> 1115 SecondString= new G4ExcitedString(start ,Gquark,-1);
>> 1116 Ganti_quark->Set4Momentum(PkinkQ2);
>> 1117 Gquark->Set4Momentum(PkinkQ1);
>> 1118
>> 1119 } else
>> 1120 { // Anti_Quark on the end
>> 1121 FirstString = new G4ExcitedString(Gquark,end ,-1);
>> 1122 SecondString= new G4ExcitedString(start ,Ganti_quark,-1);
>> 1123 Gquark->Set4Momentum(PkinkQ2);
>> 1124 Ganti_quark->Set4Momentum(PkinkQ1);
>> 1125
>> 1126 } // end of if(end->GetPDGcode() > 0)
>> 1127 } // end of if ( isProjectile )
>> 1128 } else // if(absPDGCode < 1000)
>> 1129 { // Baryon/AntiBaryon
>> 1130 if ( isProjectile )
>> 1131 { // Projectile
>> 1132 if((end->GetDefinition()->GetParticleType() == "diquarks") &&
>> 1133 (end->GetDefinition()->GetPDGEncoding() > 0 ) )
>> 1134 { // DiQuark on the end
>> 1135 FirstString = new G4ExcitedString(end ,Gquark, +1);
>> 1136 SecondString= new G4ExcitedString(Ganti_quark,start ,+1);
>> 1137 Gquark->Set4Momentum(PkinkQ1);
>> 1138 Ganti_quark->Set4Momentum(PkinkQ2);
>> 1139
>> 1140 } else
>> 1141 { // Anti_DiQuark on the end or quark
>> 1142 FirstString = new G4ExcitedString(end ,Ganti_quark, +1);
>> 1143 SecondString= new G4ExcitedString(Gquark,start ,+1);
>> 1144 Ganti_quark->Set4Momentum(PkinkQ1);
>> 1145 Gquark->Set4Momentum(PkinkQ2);
>> 1146
>> 1147 } // end of if(end->GetPDGcode() > 0)
>> 1148 } else { // Target
>> 1149
>> 1150 if((end->GetDefinition()->GetParticleType() == "diquarks") &&
>> 1151 (end->GetDefinition()->GetPDGEncoding() > 0 ) )
>> 1152 { // DiQuark on the end
>> 1153 FirstString = new G4ExcitedString(Gquark,end ,-1);
>> 1154
>> 1155 SecondString= new G4ExcitedString(start ,Ganti_quark,-1);
>> 1156 Gquark->Set4Momentum(PkinkQ1);
>> 1157 Ganti_quark->Set4Momentum(PkinkQ2);
>> 1158
>> 1159 } else
>> 1160 { // Anti_DiQuark on the end or Q
>> 1161 FirstString = new G4ExcitedString(Ganti_quark,end ,-1);
>> 1162 SecondString= new G4ExcitedString(start ,Gquark,-1);
>> 1163 Gquark->Set4Momentum(PkinkQ2);
>> 1164 Ganti_quark->Set4Momentum(PkinkQ1);
>> 1165
>> 1166 } // end of if(end->GetPDGcode() > 0)
>> 1167 } // end of if ( isProjectile )
>> 1168 } // end of if(absPDGcode < 1000)
>> 1169
>> 1170 FirstString->SetTimeOfCreation(hadron->GetTimeOfCreation());
>> 1171 FirstString->SetPosition(hadron->GetPosition());
>> 1172
>> 1173 SecondString->SetTimeOfCreation(hadron->GetTimeOfCreation());
>> 1174 SecondString->SetPosition(hadron->GetPosition());
>> 1175
>> 1176 // -------------------------------------------------------------------------
>> 1177 } else // End of kink is possible
>> 1178 { // Kink is impossible
>> 1179 if ( isProjectile )
>> 1180 {
>> 1181 FirstString= new G4ExcitedString(end,start, +1);
>> 1182 } else {
>> 1183 FirstString= new G4ExcitedString(start,end, -1);
>> 1184 }
1151 1185
1152 //=========================================== << 1186 SecondString=0;
1153 1187
1154 void G4DiffractiveExcitation::CreateStrings( << 1188 FirstString->SetTimeOfCreation(hadron->GetTimeOfCreation());
1155 << 1189 FirstString->SetPosition(hadron->GetPosition());
1156 <<
1157 <<
1158 <<
1159 <<
1160 //G4cout << "Create Strings SplitUp " << ha <<
1161 // << "Defin " << hadron->GetDefiniti <<
1162 // << "Defin " << hadron->GetDefiniti <<
1163 <<
1164 G4bool HadronIsString = hadron->IsSplit(); <<
1165 if( ! HadronIsString ) hadron->SplitUp(); <<
1166 <<
1167 G4Parton* start = hadron->GetNextParton(); <<
1168 if ( start == nullptr ) { <<
1169 G4cout << " G4FTFModel::String() Error: N <<
1170 FirstString = 0; SecondString = 0; <<
1171 return; <<
1172 } <<
1173 <<
1174 G4Parton* end = hadron->GetNextParton(); <<
1175 if ( end == nullptr ) { <<
1176 G4cout << " G4FTFModel::String() Error: N <<
1177 FirstString = 0; SecondString = 0; <<
1178 return; <<
1179 } <<
1180 <<
1181 //G4cout << start << " " << start->GetPDGco <<
1182 // << G4endl <<
1183 // << "Create string " << start->GetP <<
1184 <<
1185 if ( HadronIsString ) { <<
1186 if ( isProjectile ) { <<
1187 FirstString = new G4ExcitedString( end, <<
1188 } else { <<
1189 FirstString = new G4ExcitedString( end, <<
1190 } <<
1191 FirstString->SetTimeOfCreation( hadron->G <<
1192 FirstString->SetPosition( hadron->GetPosi <<
1193 SecondString = 0; <<
1194 return; <<
1195 } <<
1196 <<
1197 G4LorentzVector Phadron = hadron->Get4Momen <<
1198 //G4cout << "String mom " << Phadron << G4e <<
1199 G4LorentzVector Pstart( 0.0, 0.0, 0.0, 0.0 <<
1200 G4LorentzVector Pend( 0.0, 0.0, 0.0, 0.0 ); <<
1201 G4LorentzVector Pkink( 0.0, 0.0, 0.0, 0.0 ) <<
1202 G4LorentzVector PkinkQ1( 0.0, 0.0, 0.0, 0.0 <<
1203 G4LorentzVector PkinkQ2( 0.0, 0.0, 0.0, 0.0 <<
1204 <<
1205 G4int PDGcode_startQ = std::abs( start->Get <<
1206 G4int PDGcode_endQ = std::abs( end->Get <<
1207 //G4cout << "PDGcode_startQ " << PDGcode_st <<
1208 <<
1209 G4double Wmin( 0.0 ); <<
1210 if ( isProjectile ) { <<
1211 Wmin = theParameters->GetProjMinDiffMass( <<
1212 } else { <<
1213 Wmin = theParameters->GetTarMinDiffMass() <<
1214 } <<
1215 <<
1216 G4double W = hadron->Get4Momentum().mag(); <<
1217 G4double W2 = W*W; <<
1218 G4double Pt( 0.0 ), x1( 0.0 ), x3( 0.0 ); <<
1219 G4bool Kink = false; <<
1220 <<
1221 if ( ! ( ( start->GetDefinition()->GetParti <<
1222 end->GetDefinition()->GetParti <<
1223 ( start->GetDefinition()->GetParti <<
1224 end->GetDefinition()->GetParti <<
1225 // Kinky strings are allowed only for qq- <<
1226 // Kinky strings are impossible for other <<
1227 // according to the analysis of Pbar P in <<
1228 <<
1229 if ( W > Wmin ) { // Kink is possible <<
1230 if ( hadron->GetStatus() == 0 ) { <<
1231 G4double Pt2kink = theParameters->Get <<
1232 if ( Pt2kink ) { <<
1233 Pt = std::sqrt( Pt2kink * ( G4Pow:: <<
1234 } else { <<
1235 Pt = 0.0; <<
1236 } <<
1237 } else { <<
1238 Pt = 0.0; <<
1239 } <<
1240 1190
1241 if ( Pt > 500.0*MeV ) { << 1191 // momenta of string ends
1242 G4double Ymax = G4Log( W/2.0/Pt + std << 1192 //
1243 G4double Y = Ymax*( 1.0 - 2.0*G4Unifo << 1193 G4double Momentum=hadron->Get4Momentum().vect().mag();
1244 x1 = 1.0 - Pt/W * G4Exp( Y ); << 1194 G4double Plus=hadron->Get4Momentum().e() + Momentum;
1245 x3 = 1.0 - Pt/W * G4Exp(-Y ); << 1195 G4double Minus=hadron->Get4Momentum().e() - Momentum;
1246 //x2 = 2.0 - x1 - x3; << 1196
1247 << 1197 G4ThreeVector tmp;
1248 G4double Mass_startQ = 650.0*MeV; << 1198 if(Momentum > 0.)
1249 if ( PDGcode_startQ < 3 ) Mass_start << 1199 {
1250 if ( PDGcode_startQ == 3 ) Mass_start << 1200 tmp.set(hadron->Get4Momentum().px(),
1251 if ( PDGcode_startQ == 4 ) Mass_start << 1201 hadron->Get4Momentum().py(),
1252 if ( PDGcode_startQ == 5 ) Mass_start << 1202 hadron->Get4Momentum().pz());
1253 G4double Mass_endQ = 650.0*MeV; << 1203 tmp/=Momentum;
1254 if ( PDGcode_endQ < 3 ) Mass_endQ = << 1204 }
1255 if ( PDGcode_endQ == 3 ) Mass_endQ = << 1205 else
1256 if ( PDGcode_endQ == 4 ) Mass_endQ = << 1206 {
1257 if ( PDGcode_endQ == 5 ) Mass_endQ = << 1207 tmp.set(0.,0.,1.);
1258 <<
1259 G4double P2_1 = W2*x1*x1/4.0 - Mass_e <<
1260 G4double P2_3 = W2*x3*x3/4.0 - Mass_s <<
1261 G4double P2_2 = sqr( (2.0 - x1 - x3)* <<
1262 if ( P2_1 <= 0.0 || P2_3 <= 0.0 ) { <<
1263 Kink = false; <<
1264 } else { <<
1265 G4double P_1 = std::sqrt( P2_1 ); <<
1266 G4double P_2 = std::sqrt( P2_2 ); <<
1267 G4double P_3 = std::sqrt( P2_3 ); <<
1268 G4double CosT12 = ( P2_3 - P2_1 - P <<
1269 G4double CosT13 = ( P2_2 - P2_1 - P <<
1270 <<
1271 if ( std::abs( CosT12 ) > 1.0 || <<
1272 Kink = false; <<
1273 } else { <<
1274 Kink = true; <<
1275 Pt = P_2 * std::sqrt( 1.0 - CosT1 <<
1276 Pstart.setPx( -Pt ); Pstart.setPy <<
1277 Pend.setPx( 0.0 ); Pend.setPy( <<
1278 Pkink.setPx( Pt ); Pkink.setPy( <<
1279 Pstart.setE( x3*W/2.0 ); <<
1280 Pkink.setE( Pkink.vect().mag() ); <<
1281 Pend.setE( x1*W/2.0 ); <<
1282 <<
1283 G4double XkQ = GetQuarkFractionOf <<
1284 if ( Pkink.getZ() > 0.0 ) { <<
1285 if ( XkQ > 0.5 ) { <<
1286 PkinkQ1 = XkQ*Pkink; <<
1287 } else { <<
1288 PkinkQ1 = (1.0 - XkQ)*Pkink; <<
1289 } <<
1290 } else { <<
1291 if ( XkQ > 0.5 ) { <<
1292 PkinkQ1 = (1.0 - XkQ)*Pkink; <<
1293 } else { <<
1294 PkinkQ1 = XkQ*Pkink; <<
1295 } <<
1296 } <<
1297 <<
1298 PkinkQ2 = Pkink - PkinkQ1; <<
1299 // Minimizing Pt1^2+Pt3^2 <<
1300 G4double Cos2Psi = ( sqr(x1) - sq <<
1301 std::sqrt( sqr <<
1302 G4double Psi = std::acos( Cos2Psi <<
1303 <<
1304 G4LorentzRotation Rotate; <<
1305 if ( isProjectile ) { <<
1306 Rotate.rotateY( Psi ); <<
1307 } else { <<
1308 Rotate.rotateY( pi + Psi ); <<
1309 } <<
1310 Rotate.rotateZ( twopi * G4Uniform <<
1311 Pstart *= Rotate; <<
1312 Pkink *= Rotate; <<
1313 PkinkQ1 *= Rotate; <<
1314 PkinkQ2 *= Rotate; <<
1315 Pend *= Rotate; <<
1316 } 1208 }
1317 } // End of if ( P2_1 <= 0.0 || P2 <<
1318 } // End of if ( Pt > 500.0*MeV ) <<
1319 } // End of if ( W > Wmin ) : check for a <<
1320 } // end of qq-q string selection <<
1321 <<
1322 if ( Kink ) { // Kink is possible <<
1323 <<
1324 //G4cout << "Kink is sampled!" << G4endl; <<
1325 std::vector< G4double > QuarkProbabilitie <<
1326 theParameters->GetQuarkProbabilitiesA <<
1327 <<
1328 G4int QuarkInGluon( 1 ); G4double Ksi = G <<
1329 for ( unsigned int Iq = 0; Iq < 3; Iq++ ) <<
1330 //G4cout << "Iq " << Iq << G4endl; <<
1331 if ( Ksi > QuarkProbabilitiesAtGluonSpl <<
1332 } <<
1333 //G4cout << "Last Iq " << QuarkInGluon << <<
1334 G4Parton* Gquark = new G4Parton( QuarkInG <<
1335 G4Parton* Ganti_quark = new G4Parton( -Qu <<
1336 //G4cout << "Lorentz " << G4endl; <<
1337 <<
1338 G4LorentzRotation toCMS( -1 * Phadron.boo <<
1339 G4LorentzRotation toLab( toCMS.inverse() <<
1340 //G4cout << "Pstart " << Pstart << G4endl <<
1341 //G4cout << "Pend " << Pend << G4endl; <<
1342 //G4cout << "Kink1 " <<PkinkQ1<<G4endl; <<
1343 //G4cout << "Kink2 " <<PkinkQ2<<G4endl; <<
1344 //G4cout << "Pstart " << Pstart << G4endl <<
1345 <<
1346 Pstart.transform( toLab ); start->Set4Mo <<
1347 PkinkQ1.transform( toLab ); <<
1348 PkinkQ2.transform( toLab ); <<
1349 Pend.transform( toLab ); end->Set4Mome <<
1350 //G4cout << "Pstart " << Pstart << G4endl <<
1351 //G4cout << "Pend " << Pend << G4endl; <<
1352 //G4cout << "Defin " << hadron->GetDefini <<
1353 //G4cout << "Defin " << hadron->GetDefini <<
1354 <<
1355 //G4int absPDGcode = std::abs( hadron->Ge <<
1356 G4int absPDGcode = 1500; <<
1357 if ( start->GetDefinition()->GetParticleS <<
1358 end->GetDefinition()->GetParticleSub <<
1359 absPDGcode = 110; <<
1360 } <<
1361 //G4cout << "absPDGcode " << absPDGcode < <<
1362 <<
1363 if ( absPDGcode < 1000 ) { // meson <<
1364 if ( isProjectile ) { // Projectile <<
1365 if ( end->GetDefinition()->GetPDGEnco <<
1366 FirstString = new G4ExcitedString( <<
1367 SecondString = new G4ExcitedString( <<
1368 Ganti_quark->Set4Momentum( PkinkQ1 <<
1369 Gquark->Set4Momentum( PkinkQ2 ); <<
1370 } else { // Anti_Quark on the end <<
1371 FirstString = new G4ExcitedString( <<
1372 SecondString = new G4ExcitedString( <<
1373 Gquark->Set4Momentum( PkinkQ1 ); <<
1374 Ganti_quark->Set4Momentum( PkinkQ2 <<
1375 } <<
1376 } else { // Target <<
1377 if ( end->GetDefinition()->GetPDGEnco <<
1378 FirstString = new G4ExcitedString( <<
1379 SecondString = new G4ExcitedString( <<
1380 Ganti_quark->Set4Momentum( PkinkQ2 <<
1381 Gquark->Set4Momentum( PkinkQ1 ); <<
1382 } else { // Anti_Quark on the end <<
1383 FirstString = new G4ExcitedString( <<
1384 SecondString = new G4ExcitedString( <<
1385 Gquark->Set4Momentum( PkinkQ2 ); <<
1386 Ganti_quark->Set4Momentum( PkinkQ1 <<
1387 } <<
1388 } <<
1389 } else { // Baryon/AntiBaryon <<
1390 if ( isProjectile ) { // Projectile <<
1391 if ( end->GetDefinition()->GetParticl <<
1392 end->GetDefinition()->GetPDGEnco <<
1393 FirstString = new G4ExcitedString( <<
1394 SecondString = new G4ExcitedString( <<
1395 Gquark->Set4Momentum( PkinkQ1 ); <<
1396 Ganti_quark->Set4Momentum( PkinkQ2 <<
1397 } else { / <<
1398 FirstString = new G4ExcitedString( <<
1399 SecondString = new G4ExcitedString( <<
1400 Ganti_quark->Set4Momentum( PkinkQ1 <<
1401 Gquark->Set4Momentum( PkinkQ2 ); <<
1402 } <<
1403 } else { // Target <<
1404 if ( end->GetDefinition()->GetParticl <<
1405 end->GetDefinition()->GetPDGEnco <<
1406 Gquark->Set4Momentum( PkinkQ1 ); <<
1407 Ganti_quark->Set4Momentum( PkinkQ2 <<
1408 FirstString = new G4ExcitedString( <<
1409 SecondString = new G4ExcitedString( <<
1410 } else { // Anti_DiQuark on the end <<
1411 FirstString = new G4ExcitedString( <<
1412 SecondString = new G4ExcitedString( <<
1413 Gquark->Set4Momentum( PkinkQ2 ); <<
1414 Ganti_quark->Set4Momentum( PkinkQ1 <<
1415 } <<
1416 } <<
1417 } <<
1418 <<
1419 FirstString->SetTimeOfCreation( hadron->G <<
1420 FirstString->SetPosition( hadron->GetPosi <<
1421 SecondString->SetTimeOfCreation( hadron-> <<
1422 SecondString->SetPosition( hadron->GetPos <<
1423 <<
1424 } else { // Kink is impossible <<
1425 <<
1426 if ( isProjectile ) { <<
1427 FirstString = new G4ExcitedString( end, <<
1428 } else { <<
1429 FirstString = new G4ExcitedString( end, <<
1430 } <<
1431 FirstString->SetTimeOfCreation( hadron->G <<
1432 FirstString->SetPosition( hadron->GetPosi <<
1433 SecondString = 0; <<
1434 // momenta of string ends <<
1435 G4LorentzVector HadronMom = hadron->Get4M <<
1436 G4LorentzVector Pstart1 = G4LorentzVector <<
1437 G4LorentzVector Pend1 = G4LorentzVector <<
1438 G4double Pz = HadronMom.pz(); <<
1439 G4double Eh = HadronMom.e(); <<
1440 G4double Pt2 = sqr( HadronMom.px() ) + sq <<
1441 G4double Mt2 = HadronMom.mt2(); <<
1442 G4double Exp = std::sqrt( sqr(Pz) + ( sqr <<
1443 G4double Pzq = Pz/2.0 - Exp; <<
1444 G4double Eq = std::sqrt( sqr(Pzq) + Pt2 <<
1445 G4double Pzqq = Pz/2.0 + Exp; <<
1446 G4double Eqq = std::sqrt( sqr(Pzqq) + Pt <<
1447 start->Set4Momentum( Pstart1 ); <<
1448 end->Set4Momentum( Pend1 ); <<
1449 Pstart = Pstart1; Pend = Pend1; <<
1450 <<
1451 } // End of "if (Kink)" <<
1452 <<
1453 //G4cout << "Quarks in the string at creati <<
1454 // << " " << FirstString->GetLeftPart <<
1455 // << FirstString << " " << SecondStr <<
1456 <<
1457 #ifdef G4_FTFDEBUG <<
1458 G4cout << " generated string flavors <<
1459 << end->GetPDGcode() << G4endl << " <<
1460 << start->Get4Momentum() << "mass : <<
1461 << " generated string momenta: Diqua <<
1462 << end->Get4Momentum().mag() << G4en <<
1463 << Pstart + Pend << G4endl << " Orig <<
1464 << hadron->Get4Momentum() << " "<<ha <<
1465 #endif <<
1466 <<
1467 return; <<
1468 } <<
1469 1209
>> 1210 G4LorentzVector Pstart(tmp,0.);
>> 1211 G4LorentzVector Pend(tmp,0.);
1470 1212
1471 //=========================================== << 1213 if(isProjectile)
>> 1214 {
>> 1215 Pstart*=(-1.)*Minus/2.;
>> 1216 Pend *=(+1.)*Plus /2.;
>> 1217 }
>> 1218 else
>> 1219 {
>> 1220 Pstart*=(+1.)*Plus/2.;
>> 1221 Pend *=(-1.)*Minus/2.;
>> 1222 }
1472 1223
1473 G4double G4DiffractiveExcitation::ChooseP( G4 << 1224 Momentum=-Pstart.mag();
1474 // Choose an x between Xmin and Xmax with P << 1225 Pstart.setT(Momentum); // It is assumed that quark has m=0.
1475 // To be improved... <<
1476 G4double range = Pmax - Pmin; <<
1477 if ( Pmin <= 0.0 || range <= 0.0 ) { <<
1478 G4cout << " Pmin, range : " << Pmin << " <<
1479 throw G4HadronicException( __FILE__, __LI <<
1480 "G4Diffractive <<
1481 } <<
1482 G4double P = Pmin * G4Pow::GetInstance()->p <<
1483 //G4double P = (Pmax - Pmin) * G4UniformRan <<
1484 return P; <<
1485 } <<
1486 1226
>> 1227 Momentum=-Pend.mag();
>> 1228 Pend.setT(Momentum); // It is assumed that di-quark has m=0.
1487 1229
1488 //=========================================== << 1230 start->Set4Momentum(Pstart);
>> 1231 end->Set4Momentum(Pend);
>> 1232 SecondString=0;
>> 1233 } // End of kink is impossible
>> 1234
>> 1235 #ifdef G4_FTFDEBUG
>> 1236 G4cout << " generated string flavors "
>> 1237 << start->GetPDGcode() << " / "
>> 1238 << end->GetPDGcode() << G4endl;
>> 1239 G4cout << " generated string momenta: quark "
>> 1240 << start->Get4Momentum() << "mass : "
>> 1241 <<start->Get4Momentum().mag() << G4endl;
>> 1242 G4cout << " generated string momenta: Diquark "
>> 1243 << end ->Get4Momentum()
>> 1244 << "mass : " <<end->Get4Momentum().mag()<< G4endl;
>> 1245 G4cout << " sum of ends " << Pstart+Pend << G4endl;
>> 1246 G4cout << " Original " << hadron->Get4Momentum() << G4endl;
>> 1247 #endif
1489 1248
1490 G4ThreeVector G4DiffractiveExcitation::Gaussi << 1249 return;
1491 // @@ this method is used in FTFModel as w << 1250
1492 G4double Pt2( 0.0 ); <<
1493 if ( AveragePt2 <= 0.0 ) { <<
1494 Pt2 = 0.0; <<
1495 } else { <<
1496 Pt2 = -AveragePt2 * G4Log( 1.0 + G4Unifor <<
1497 ( G4Ex <<
1498 } <<
1499 G4double Pt = std::sqrt( Pt2 ); <<
1500 G4double phi = G4UniformRand() * twopi; <<
1501 return G4ThreeVector( Pt * std::cos( phi ), <<
1502 } 1251 }
1503 1252
1504 1253
1505 //=========================================== << 1254 // --------- private methods ----------------------
1506 1255
1507 G4double G4DiffractiveExcitation::GetQuarkFra << 1256 // ---------------------------------------------------------------------
1508 G4double z, yf; << 1257 G4double G4DiffractiveExcitation::ChooseP(G4double Pmin, G4double Pmax) const
1509 const G4int maxNumberOfLoops = 10000; << 1258 {
1510 G4int loopCounter = 0; << 1259 // choose an x between Xmin and Xmax with P(x) ~ 1/x
1511 do { << 1260 // to be improved...
1512 z = zmin + G4UniformRand() * (zmax - zmin << 1261
1513 yf = z*z + sqr(1.0 - z); << 1262 G4double range=Pmax-Pmin;
1514 } while ( ( G4UniformRand() > yf ) && << 1263
1515 ++loopCounter < maxNumberOfLoops << 1264 if ( Pmin <= 0. || range <=0. )
1516 if ( loopCounter >= maxNumberOfLoops ) { << 1265 {
1517 z = 0.5*(zmin + zmax); // Just something << 1266 G4cout << " Pmin, range : " << Pmin << " , " << range << G4endl;
1518 } << 1267 throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation::ChooseP : Invalid arguments ");
1519 return z; << 1268 }
1520 } <<
1521 <<
1522 <<
1523 //=========================================== <<
1524 1269
1525 void G4DiffractiveExcitation::UnpackMeson( co << 1270 G4double P=Pmin * std::pow(Pmax/Pmin,G4UniformRand());
1526 G4int absIdPDG = std::abs( IdPDG ); << 1271 return P;
1527 if ( ! ( absIdPDG == 111 || absIdPDG == 221 <<
1528 absIdPDG == 441 || absIdPDG == 443 <<
1529 // All other projectile mesons (including <<
1530 Q1 = absIdPDG / 100; <<
1531 Q2 = (absIdPDG % 100) / 10; <<
1532 G4int anti = 1 - 2 * ( std::max( Q1, Q2 ) <<
1533 if ( IdPDG < 0 ) anti *= -1; <<
1534 Q1 *= anti; <<
1535 Q2 *= -1 * anti; <<
1536 } else { <<
1537 if ( absIdPDG == 441 || absIdPDG == 443 ) <<
1538 Q1 = 4; Q2 = -4; <<
1539 } else if ( absIdPDG == 553 ) { <<
1540 Q1 = 5; Q2 = -5; <<
1541 } else { <<
1542 if ( G4UniformRand() < 0.5 ) { <<
1543 Q1 = 1; Q2 = -1; <<
1544 } else { <<
1545 Q1 = 2; Q2 = -2; <<
1546 } <<
1547 } <<
1548 } <<
1549 return; <<
1550 } 1272 }
1551 1273
1552 << 1274 // ---------------------------------------------------------------------
1553 //=========================================== << 1275 G4ThreeVector G4DiffractiveExcitation::GaussianPt(G4double AveragePt2,
1554 << 1276 G4double maxPtSquare) const
1555 void G4DiffractiveExcitation::UnpackBaryon( G << 1277 { // @@ this method is used in FTFModel as well. Should go somewhere common!
1556 G << 1278
1557 Q1 = IdPDG / 1000; << 1279 G4double Pt2(0.);
1558 Q2 = (IdPDG % 1000) / 100; << 1280 if(AveragePt2 <= 0.) {Pt2=0.;}
1559 Q3 = (IdPDG % 100) / 10; << 1281 else
1560 return; << 1282 {
>> 1283 Pt2 = -AveragePt2 * std::log(1. + G4UniformRand() *
>> 1284 (std::exp(-maxPtSquare/AveragePt2)-1.));
>> 1285 }
>> 1286 G4double Pt=std::sqrt(Pt2);
>> 1287 G4double phi=G4UniformRand() * twopi;
>> 1288 return G4ThreeVector (Pt*std::cos(phi), Pt*std::sin(phi), 0.);
1561 } 1289 }
1562 1290
>> 1291 // ---------------------------------------------------------------------
>> 1292 G4double G4DiffractiveExcitation::GetQuarkFractionOfKink(G4double zmin, G4double zmax) const
>> 1293 {
>> 1294 G4double z, yf;
>> 1295 do {
>> 1296 z = zmin + G4UniformRand()*(zmax-zmin);
>> 1297 yf = z*z +sqr(1 - z);
>> 1298 }
>> 1299 while (G4UniformRand() > yf);
>> 1300 return z;
>> 1301 }
>> 1302 // ---------------------------------------------------------------------
>> 1303 void G4DiffractiveExcitation::UnpackMeson(const G4int IdPDG, G4int &Q1, G4int &Q2) const // Uzhi 7.09.09
>> 1304 {
>> 1305 G4int absIdPDG = std::abs(IdPDG);
>> 1306 Q1= absIdPDG/ 100;
>> 1307 Q2= (absIdPDG %100)/10;
>> 1308
>> 1309 G4int anti= 1 -2 * ( std::max( Q1, Q2 ) % 2 );
>> 1310
>> 1311 if (IdPDG < 0 ) anti *=-1;
>> 1312 Q1 *= anti;
>> 1313 Q2 *= -1 * anti;
>> 1314 return;
>> 1315 }
>> 1316 // ---------------------------------------------------------------------
>> 1317 void G4DiffractiveExcitation::UnpackBaryon(G4int IdPDG,
>> 1318 G4int &Q1, G4int &Q2, G4int &Q3) const // Uzhi 7.09.09
>> 1319 {
>> 1320 Q1 = IdPDG / 1000;
>> 1321 Q2 = (IdPDG % 1000) / 100;
>> 1322 Q3 = (IdPDG % 100) / 10;
>> 1323 return;
>> 1324 }
>> 1325 // ---------------------------------------------------------------------
>> 1326 G4int G4DiffractiveExcitation::NewNucleonId(G4int Q1, G4int Q2, G4int Q3) const // Uzhi 7.09.09
>> 1327 {
>> 1328 G4int TmpQ(0);
>> 1329 if( Q3 > Q2 )
>> 1330 {
>> 1331 TmpQ = Q2;
>> 1332 Q2 = Q3;
>> 1333 Q3 = TmpQ;
>> 1334 } else if( Q3 > Q1 )
>> 1335 {
>> 1336 TmpQ = Q1;
>> 1337 Q1 = Q3;
>> 1338 Q3 = TmpQ;
>> 1339 }
>> 1340
>> 1341 if( Q2 > Q1 )
>> 1342 {
>> 1343 TmpQ = Q1;
>> 1344 Q1 = Q2;
>> 1345 Q2 = TmpQ;
>> 1346 }
1563 1347
1564 //=========================================== << 1348 G4int NewCode = Q1*1000 + Q2* 100 + Q3* 10 + 2;
1565 << 1349 return NewCode;
1566 G4int G4DiffractiveExcitation::NewNucleonId( << 1350 }
1567 // Order the three integers in such a way t << 1351 // ---------------------------------------------------------------------
1568 G4int TmpQ( 0 ); << 1352 G4DiffractiveExcitation::G4DiffractiveExcitation(const G4DiffractiveExcitation &)
1569 if ( Q3 > Q2 ) { << 1353 {
1570 TmpQ = Q2; << 1354 throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation copy contructor not meant to be called");
1571 Q2 = Q3; <<
1572 Q3 = TmpQ; <<
1573 } else if ( Q3 > Q1 ) { <<
1574 TmpQ = Q1; <<
1575 Q1 = Q3; <<
1576 Q3 = TmpQ; <<
1577 } <<
1578 if ( Q2 > Q1 ) { <<
1579 TmpQ = Q1; <<
1580 Q1 = Q2; <<
1581 Q2 = TmpQ; <<
1582 } <<
1583 // By now Q1 >= Q2 >= Q3 <<
1584 G4int NewCode = Q1*1000 + Q2*100 + Q3*10 + <<
1585 return NewCode; <<
1586 } 1355 }
1587 1356
1588 1357
1589 //=========================================== << 1358 G4DiffractiveExcitation::~G4DiffractiveExcitation()
1590 << 1359 {
1591 G4DiffractiveExcitation::G4DiffractiveExcitat <<
1592 throw G4HadronicException( __FILE__, __LINE <<
1593 "G4DiffractiveEx <<
1594 } 1360 }
1595 1361
1596 1362
1597 //=========================================== << 1363 const G4DiffractiveExcitation & G4DiffractiveExcitation::operator=(const G4DiffractiveExcitation &)
1598 << 1364 {
1599 const G4DiffractiveExcitation & G4Diffractive << 1365 throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation = operator meant to be called");
1600 throw G4HadronicException( __FILE__, __LINE << 1366 return *this;
1601 "G4DiffractiveEx <<
1602 return *this; <<
1603 } 1367 }
1604 1368
1605 1369
1606 //=========================================== << 1370 int G4DiffractiveExcitation::operator==(const G4DiffractiveExcitation &) const
1607 << 1371 {
1608 G4bool G4DiffractiveExcitation::operator==( c << 1372 throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation == operator meant to be called");
1609 throw G4HadronicException( __FILE__, __LINE << 1373 return false;
1610 "G4DiffractiveEx <<
1611 } 1374 }
1612 1375
1613 << 1376 int G4DiffractiveExcitation::operator!=(const G4DiffractiveExcitation &) const
1614 //=========================================== << 1377 {
1615 << 1378 throw G4HadronicException(__FILE__, __LINE__, "G4DiffractiveExcitation != operator meant to be called");
1616 G4bool G4DiffractiveExcitation::operator!= ( << 1379 return true;
1617 throw G4HadronicException( __FILE__, __LINE <<
1618 "G4DiffractiveEx <<
1619 } 1380 }
1620 <<
1621 1381