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36b81802 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
7cdba479 | 16 | /* $Id$ */ |
36b81802 | 17 | |
18 | // Generator using HIJING as an external generator | |
19 | // The main HIJING options are accessable for the user through this interface. | |
20 | // Uses the THijing implementation of TGenerator. | |
14cae7e9 | 21 | // Author: |
22 | // Andreas Morsch (andreas.morsch@cern.ch) | |
36b81802 | 23 | // |
36b81802 | 24 | |
3010c308 | 25 | #include <TClonesArray.h> |
36b81802 | 26 | #include <TGraph.h> |
27 | #include <THijing.h> | |
28 | #include <TLorentzVector.h> | |
29 | #include <TPDGCode.h> | |
30 | #include <TParticle.h> | |
31 | ||
32 | #include "AliGenHijing.h" | |
33 | #include "AliGenHijingEventHeader.h" | |
7cdba479 | 34 | #include "AliHijingRndm.h" |
3f4e7ad8 | 35 | #include "AliLog.h" |
36 | #include "AliRun.h" | |
36b81802 | 37 | |
7cdba479 | 38 | ClassImp(AliGenHijing) |
36b81802 | 39 | |
40 | AliGenHijing::AliGenHijing() | |
9d89c88d | 41 | :AliGenMC(), |
42 | fFrame("CMS"), | |
43 | fMinImpactParam(0.), | |
44 | fMaxImpactParam(5.), | |
45 | fKeep(0), | |
46 | fQuench(1), | |
47 | fShadowing(1), | |
6965c13e | 48 | fDecaysOff(3), |
9d89c88d | 49 | fTrigger(0), |
50 | fEvaluate(0), | |
51 | fSelectAll(0), | |
52 | fFlavor(0), | |
9d89c88d | 53 | fKineBias(0.), |
54 | fTrials(0), | |
55 | fXsection(0.), | |
56 | fHijing(0), | |
5bfd0cb7 | 57 | fPtHardMin(2.0), |
58 | fPtHardMax(-1), | |
9d89c88d | 59 | fSpectators(1), |
60 | fDsigmaDb(0), | |
61 | fDnDb(0), | |
62 | fPtMinJet(-2.5), | |
63 | fEtaMinJet(-20.), | |
64 | fEtaMaxJet(+20.), | |
65 | fPhiMinJet(0.), | |
66 | fPhiMaxJet(2. * TMath::Pi()), | |
67 | fRadiation(3), | |
68 | fSimpleJet(kFALSE), | |
69 | fNoGammas(kFALSE), | |
70 | fProjectileSpecn(0), | |
71 | fProjectileSpecp(0), | |
72 | fTargetSpecn(0), | |
73 | fTargetSpecp(0), | |
74 | fLHC(kFALSE), | |
75 | fRandomPz(kFALSE), | |
d07f0af2 | 76 | fNoHeavyQuarks(kFALSE), |
68f18c58 | 77 | fEventTime(0.), |
f2f240a9 | 78 | fHeader(AliGenHijingEventHeader("Hijing")) |
36b81802 | 79 | { |
fc7e1b1c | 80 | // Constructor |
e7c989e4 | 81 | fEnergyCMS = 5500.; |
fc7e1b1c | 82 | AliHijingRndm::SetHijingRandom(GetRandom()); |
36b81802 | 83 | } |
84 | ||
85 | AliGenHijing::AliGenHijing(Int_t npart) | |
9d89c88d | 86 | :AliGenMC(npart), |
87 | fFrame("CMS"), | |
88 | fMinImpactParam(0.), | |
89 | fMaxImpactParam(5.), | |
90 | fKeep(0), | |
91 | fQuench(1), | |
92 | fShadowing(1), | |
6965c13e | 93 | fDecaysOff(3), |
9d89c88d | 94 | fTrigger(0), |
95 | fEvaluate(0), | |
96 | fSelectAll(0), | |
97 | fFlavor(0), | |
9d89c88d | 98 | fKineBias(0.), |
99 | fTrials(0), | |
100 | fXsection(0.), | |
101 | fHijing(0), | |
5bfd0cb7 | 102 | fPtHardMin(2.0), |
103 | fPtHardMax(-1), | |
9d89c88d | 104 | fSpectators(1), |
105 | fDsigmaDb(0), | |
106 | fDnDb(0), | |
107 | fPtMinJet(-2.5), | |
108 | fEtaMinJet(-20.), | |
109 | fEtaMaxJet(+20.), | |
110 | fPhiMinJet(0.), | |
111 | fPhiMaxJet(2. * TMath::Pi()), | |
112 | fRadiation(3), | |
113 | fSimpleJet(kFALSE), | |
114 | fNoGammas(kFALSE), | |
115 | fProjectileSpecn(0), | |
116 | fProjectileSpecp(0), | |
117 | fTargetSpecn(0), | |
118 | fTargetSpecp(0), | |
119 | fLHC(kFALSE), | |
120 | fRandomPz(kFALSE), | |
d07f0af2 | 121 | fNoHeavyQuarks(kFALSE), |
68f18c58 | 122 | fEventTime(0.), |
f2f240a9 | 123 | fHeader(AliGenHijingEventHeader("Hijing")) |
36b81802 | 124 | { |
125 | // Default PbPb collisions at 5. 5 TeV | |
126 | // | |
e7c989e4 | 127 | fEnergyCMS = 5500.; |
36b81802 | 128 | fName = "Hijing"; |
129 | fTitle= "Particle Generator using HIJING"; | |
36b81802 | 130 | // |
36b81802 | 131 | // |
132 | // Set random number generator | |
7cdba479 | 133 | AliHijingRndm::SetHijingRandom(GetRandom()); |
f2f240a9 | 134 | |
36b81802 | 135 | } |
136 | ||
36b81802 | 137 | AliGenHijing::~AliGenHijing() |
138 | { | |
139 | // Destructor | |
140 | if ( fDsigmaDb) delete fDsigmaDb; | |
141 | if ( fDnDb) delete fDnDb; | |
36b81802 | 142 | } |
143 | ||
144 | void AliGenHijing::Init() | |
145 | { | |
146 | // Initialisation | |
9071ae63 | 147 | fFrame.Resize(8); |
148 | fTarget.Resize(8); | |
149 | fProjectile.Resize(8); | |
36b81802 | 150 | |
151 | SetMC(new THijing(fEnergyCMS, fFrame, fProjectile, fTarget, | |
152 | fAProjectile, fZProjectile, fATarget, fZTarget, | |
153 | fMinImpactParam, fMaxImpactParam)); | |
154 | ||
b88f5cea | 155 | fHijing=(THijing*) fMCEvGen; |
36b81802 | 156 | fHijing->SetIHPR2(2, fRadiation); |
157 | fHijing->SetIHPR2(3, fTrigger); | |
158 | fHijing->SetIHPR2(6, fShadowing); | |
159 | fHijing->SetIHPR2(12, fDecaysOff); | |
160 | fHijing->SetIHPR2(21, fKeep); | |
5bfd0cb7 | 161 | fHijing->SetHIPR1(8, fPtHardMin); |
162 | fHijing->SetHIPR1(9, fPtHardMax); | |
36b81802 | 163 | fHijing->SetHIPR1(10, fPtMinJet); |
164 | fHijing->SetHIPR1(50, fSimpleJet); | |
165 | // | |
166 | // Quenching | |
167 | // | |
168 | // | |
169 | // fQuench = 0: no quenching | |
170 | // fQuench = 1: hijing default | |
171 | // fQuench = 2: new LHC parameters for HIPR1(11) and HIPR1(14) | |
172 | // fQuench = 3: new RHIC parameters for HIPR1(11) and HIPR1(14) | |
173 | // fQuench = 4: new LHC parameters with log(e) dependence | |
174 | // fQuench = 5: new RHIC parameters with log(e) dependence | |
175 | fHijing->SetIHPR2(50, 0); | |
176 | if (fQuench > 0) | |
177 | fHijing->SetIHPR2(4, 1); | |
178 | else | |
179 | fHijing->SetIHPR2(4, 0); | |
180 | // New LHC parameters from Xin-Nian Wang | |
181 | if (fQuench == 2) { | |
182 | fHijing->SetHIPR1(14, 1.1); | |
183 | fHijing->SetHIPR1(11, 3.7); | |
184 | } else if (fQuench == 3) { | |
185 | fHijing->SetHIPR1(14, 0.20); | |
186 | fHijing->SetHIPR1(11, 2.5); | |
187 | } else if (fQuench == 4) { | |
188 | fHijing->SetIHPR2(50, 1); | |
189 | fHijing->SetHIPR1(14, 4.*0.34); | |
190 | fHijing->SetHIPR1(11, 3.7); | |
191 | } else if (fQuench == 5) { | |
192 | fHijing->SetIHPR2(50, 1); | |
193 | fHijing->SetHIPR1(14, 0.34); | |
194 | fHijing->SetHIPR1(11, 2.5); | |
195 | } | |
196 | ||
f82795ff | 197 | // |
198 | // Heavy quarks | |
199 | // | |
200 | if (fNoHeavyQuarks) { | |
201 | fHijing->SetIHPR2(49, 1); | |
202 | } else { | |
203 | fHijing->SetIHPR2(49, 0); | |
204 | } | |
205 | ||
36b81802 | 206 | |
cc463e4a | 207 | AliGenMC::Init(); |
36b81802 | 208 | |
209 | // | |
210 | // Initialize Hijing | |
211 | // | |
212 | fHijing->Initialize(); | |
213 | // | |
214 | if (fEvaluate) EvaluateCrossSections(); | |
215 | // | |
216 | } | |
217 | ||
218 | void AliGenHijing::Generate() | |
219 | { | |
220 | // Generate one event | |
221 | ||
222 | Float_t polar[3] = {0,0,0}; | |
223 | Float_t origin[3] = {0,0,0}; | |
224 | Float_t origin0[3] = {0,0,0}; | |
0c0c6204 | 225 | Float_t p[3]; |
36b81802 | 226 | Float_t tof; |
227 | ||
228 | // converts from mm/c to s | |
14bca1e5 | 229 | const Float_t kconv = 0.001/2.99792458e8; |
36b81802 | 230 | // |
231 | Int_t nt = 0; | |
232 | Int_t jev = 0; | |
2d677e30 | 233 | Int_t j, kf, ks, ksp, imo; |
36b81802 | 234 | kf = 0; |
235 | ||
236 | ||
237 | ||
238 | fTrials = 0; | |
e60d2969 | 239 | |
36b81802 | 240 | for (j = 0;j < 3; j++) origin0[j] = fOrigin[j]; |
16a37f16 | 241 | |
36b81802 | 242 | if(fVertexSmear == kPerEvent) { |
0c0c6204 | 243 | Vertex(); |
244 | for (j=0; j < 3; j++) origin0[j] = fVertex[j]; | |
245 | } | |
246 | ||
b25b821e | 247 | |
248 | Float_t sign = (fRandomPz && (Rndm() < 0.5))? -1. : 1.; | |
16a37f16 | 249 | |
36b81802 | 250 | while(1) |
251 | { | |
252 | // Generate one event | |
253 | // -------------------------------------------------------------------------- | |
f0c86dd6 | 254 | fProjectileSpecn = 0; |
255 | fProjectileSpecp = 0; | |
b25b821e | 256 | fTargetSpecn = 0; |
257 | fTargetSpecp = 0; | |
36b81802 | 258 | // -------------------------------------------------------------------------- |
259 | fHijing->GenerateEvent(); | |
260 | fTrials++; | |
e60d2969 | 261 | fNprimaries = 0; |
8507138f | 262 | fHijing->ImportParticles(&fParticles,"All"); |
36b81802 | 263 | if (fTrigger != kNoTrigger) { |
264 | if (!CheckTrigger()) continue; | |
265 | } | |
71ea527c | 266 | if (fLHC) Boost(); |
36b81802 | 267 | |
268 | ||
8507138f | 269 | Int_t np = fParticles.GetEntriesFast(); |
36b81802 | 270 | Int_t nc = 0; |
271 | if (np == 0 ) continue; | |
272 | Int_t i; | |
273 | Int_t* newPos = new Int_t[np]; | |
274 | Int_t* pSelected = new Int_t[np]; | |
275 | ||
276 | for (i = 0; i < np; i++) { | |
277 | newPos[i] = i; | |
278 | pSelected[i] = 0; | |
279 | } | |
280 | ||
281 | // Get event vertex | |
282 | // | |
0c0c6204 | 283 | fVertex[0] = origin0[0]; |
284 | fVertex[1] = origin0[1]; | |
285 | fVertex[2] = origin0[2]; | |
36b81802 | 286 | |
287 | // | |
288 | // First select parent particles | |
289 | // | |
8f64c44f | 290 | TParticle * iparticle = 0; |
36b81802 | 291 | for (i = 0; i < np; i++) { |
8507138f | 292 | iparticle = (TParticle *) fParticles.At(i); |
36b81802 | 293 | |
294 | // Is this a parent particle ? | |
295 | if (Stable(iparticle)) continue; | |
296 | // | |
297 | Bool_t selected = kTRUE; | |
298 | Bool_t hasSelectedDaughters = kFALSE; | |
299 | ||
300 | ||
301 | kf = iparticle->GetPdgCode(); | |
302 | ks = iparticle->GetStatusCode(); | |
303 | if (kf == 92) continue; | |
304 | ||
305 | if (!fSelectAll) selected = KinematicSelection(iparticle, 0) && | |
306 | SelectFlavor(kf); | |
307 | hasSelectedDaughters = DaughtersSelection(iparticle); | |
308 | // | |
309 | // Put particle on the stack if it is either selected or | |
310 | // it is the mother of at least one seleted particle | |
311 | // | |
312 | if (selected || hasSelectedDaughters) { | |
313 | nc++; | |
314 | pSelected[i] = 1; | |
315 | } // selected | |
316 | } // particle loop parents | |
317 | // | |
318 | // Now select the final state particles | |
319 | // | |
320 | ||
321 | for (i = 0; i<np; i++) { | |
c4998efa | 322 | iparticle = (TParticle *) fParticles.At(i); |
36b81802 | 323 | // Is this a final state particle ? |
324 | if (!Stable(iparticle)) continue; | |
325 | ||
326 | Bool_t selected = kTRUE; | |
327 | kf = iparticle->GetPdgCode(); | |
328 | ks = iparticle->GetStatusCode(); | |
2d677e30 | 329 | ksp = iparticle->GetUniqueID(); |
36b81802 | 330 | |
331 | // -------------------------------------------------------------------------- | |
332 | // Count spectator neutrons and protons | |
2d677e30 | 333 | if(ksp == 0 || ksp == 1){ |
f0c86dd6 | 334 | if(kf == kNeutron) fProjectileSpecn += 1; |
335 | if(kf == kProton) fProjectileSpecp += 1; | |
336 | } | |
2d677e30 | 337 | else if(ksp == 10 || ksp == 11){ |
f0c86dd6 | 338 | if(kf == kNeutron) fTargetSpecn += 1; |
339 | if(kf == kProton) fTargetSpecp += 1; | |
36b81802 | 340 | } |
341 | // -------------------------------------------------------------------------- | |
342 | // | |
343 | if (!fSelectAll) { | |
344 | selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf); | |
2d677e30 | 345 | if (!fSpectators && selected) selected = (ksp != 0 && ksp != 1 && ksp != 10 |
346 | && ksp != 11); | |
36b81802 | 347 | } |
348 | // | |
349 | // Put particle on the stack if selected | |
350 | // | |
351 | if (selected) { | |
352 | nc++; | |
353 | pSelected[i] = 1; | |
354 | } // selected | |
355 | } // particle loop final state | |
3439da17 | 356 | |
36b81802 | 357 | // |
3439da17 | 358 | // Time of the interactions |
359 | Float_t tInt = 0.; | |
360 | if (fPileUpTimeWindow > 0.) tInt = fPileUpTimeWindow * (2. * gRandom->Rndm() - 1.); | |
361 | ||
36b81802 | 362 | // |
3439da17 | 363 | // Write particles to stack |
364 | ||
36b81802 | 365 | for (i = 0; i<np; i++) { |
c4998efa | 366 | iparticle = (TParticle *) fParticles.At(i); |
36b81802 | 367 | Bool_t hasMother = (iparticle->GetFirstMother() >=0); |
368 | Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0); | |
36b81802 | 369 | if (pSelected[i]) { |
370 | kf = iparticle->GetPdgCode(); | |
371 | ks = iparticle->GetStatusCode(); | |
372 | p[0] = iparticle->Px(); | |
373 | p[1] = iparticle->Py(); | |
b25b821e | 374 | p[2] = iparticle->Pz() * sign; |
36b81802 | 375 | origin[0] = origin0[0]+iparticle->Vx()/10; |
376 | origin[1] = origin0[1]+iparticle->Vy()/10; | |
377 | origin[2] = origin0[2]+iparticle->Vz()/10; | |
d07f0af2 | 378 | fEventTime = 0.; |
379 | ||
16a37f16 | 380 | if (TestBit(kVertexRange)) { |
d07f0af2 | 381 | fEventTime = sign * origin0[2] / 2.99792458e10; |
382 | tof = kconv * iparticle->T() + fEventTime; | |
16a37f16 | 383 | } else { |
384 | tof = kconv * iparticle->T(); | |
d07f0af2 | 385 | fEventTime = tInt; |
16a37f16 | 386 | if (fPileUpTimeWindow > 0.) tof += tInt; |
387 | } | |
36b81802 | 388 | imo = -1; |
389 | TParticle* mother = 0; | |
390 | if (hasMother) { | |
391 | imo = iparticle->GetFirstMother(); | |
8507138f | 392 | mother = (TParticle *) fParticles.At(imo); |
e57522c0 | 393 | imo = (mother->GetPdgCode() != 92) ? newPos[imo] : -1; |
36b81802 | 394 | } // if has mother |
395 | Bool_t tFlag = (fTrackIt && !hasDaughter); | |
3439da17 | 396 | PushTrack(tFlag,imo,kf,p,origin,polar,tof,kPNoProcess,nt, 1., ks); |
e60d2969 | 397 | fNprimaries++; |
36b81802 | 398 | KeepTrack(nt); |
399 | newPos[i] = nt; | |
400 | } // if selected | |
401 | } // particle loop | |
402 | delete[] newPos; | |
403 | delete[] pSelected; | |
404 | ||
3f4e7ad8 | 405 | AliInfo(Form("\n I've put %i particles on the stack \n",nc)); |
36b81802 | 406 | if (nc > 0) { |
407 | jev += nc; | |
408 | if (jev >= fNpart || fNpart == -1) { | |
409 | fKineBias = Float_t(fNpart)/Float_t(fTrials); | |
3f4e7ad8 | 410 | AliInfo(Form("\n Trials: %i %i %i\n",fTrials, fNpart, jev)); |
36b81802 | 411 | break; |
412 | } | |
413 | } | |
414 | } // event loop | |
415 | MakeHeader(); | |
416 | SetHighWaterMark(nt); | |
417 | } | |
418 | ||
419 | void AliGenHijing::KeepFullEvent() | |
420 | { | |
421 | fKeep=1; | |
422 | } | |
423 | ||
424 | void AliGenHijing::EvaluateCrossSections() | |
425 | { | |
426 | // Glauber Calculation of geometrical x-section | |
427 | // | |
428 | Float_t xTot = 0.; // barn | |
429 | Float_t xTotHard = 0.; // barn | |
430 | Float_t xPart = 0.; // barn | |
431 | Float_t xPartHard = 0.; // barn | |
432 | Float_t sigmaHard = 0.1; // mbarn | |
433 | Float_t bMin = 0.; | |
434 | Float_t bMax = fHijing->GetHIPR1(34)+fHijing->GetHIPR1(35); | |
435 | const Float_t kdib = 0.2; | |
436 | Int_t kMax = Int_t((bMax-bMin)/kdib)+1; | |
437 | ||
438 | ||
439 | printf("\n Projectile Radius (fm): %f \n",fHijing->GetHIPR1(34)); | |
440 | printf("\n Target Radius (fm): %f \n",fHijing->GetHIPR1(35)); | |
6965c13e | 441 | printf("\n Inelastic and total cross section (mb) %f %f \n",fHijing->GetHINT1(12), fHijing->GetHINT1(13)); |
36b81802 | 442 | Int_t i; |
443 | Float_t oldvalue= 0.; | |
444 | ||
445 | Float_t* b = new Float_t[kMax]; | |
446 | Float_t* si1 = new Float_t[kMax]; | |
447 | Float_t* si2 = new Float_t[kMax]; | |
8f64c44f | 448 | for (i = 0; i < kMax; i++){ |
449 | b[i] = 0.; | |
450 | si1[i] = 0.; | |
451 | si2[i] = 0.; | |
452 | } | |
453 | ||
36b81802 | 454 | for (i = 0; i < kMax; i++) |
455 | { | |
456 | Float_t xb = bMin+i*kdib; | |
457 | Float_t ov; | |
458 | ov=fHijing->Profile(xb); | |
459 | Float_t gb = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*(1.-TMath::Exp(-fHijing->GetHINT1(12)*ov)); | |
460 | Float_t gbh = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*sigmaHard*ov; | |
461 | xTot+=gb; | |
462 | xTotHard += gbh; | |
463 | printf("profile %f %f %f\n", xb, ov, fHijing->GetHINT1(12)); | |
464 | ||
465 | if (xb > fMinImpactParam && xb < fMaxImpactParam) | |
466 | { | |
467 | xPart += gb; | |
468 | xPartHard += gbh; | |
469 | } | |
470 | ||
471 | if(oldvalue) if ((xTot-oldvalue)/oldvalue<0.0001) break; | |
472 | oldvalue = xTot; | |
473 | printf("\n Total cross section (barn): %d %f %f \n",i, xb, xTot); | |
474 | printf("\n Hard cross section (barn): %d %f %f \n\n",i, xb, xTotHard); | |
475 | if (i>0) { | |
476 | si1[i] = gb/kdib; | |
477 | si2[i] = gbh/gb; | |
478 | b[i] = xb; | |
479 | } | |
480 | } | |
481 | ||
482 | printf("\n Total cross section (barn): %f \n",xTot); | |
483 | printf("\n Hard cross section (barn): %f \n \n",xTotHard); | |
484 | printf("\n Partial cross section (barn): %f %f \n",xPart, xPart/xTot*100.); | |
485 | printf("\n Partial hard cross section (barn): %f %f \n",xPartHard, xPartHard/xTotHard*100.); | |
486 | ||
487 | // Store result as a graph | |
488 | b[0] = 0; | |
489 | si1[0] = 0; | |
490 | si2[0]=si2[1]; | |
491 | ||
492 | fDsigmaDb = new TGraph(i, b, si1); | |
493 | fDnDb = new TGraph(i, b, si2); | |
494 | } | |
495 | ||
904a753d | 496 | Bool_t AliGenHijing::DaughtersSelection(const TParticle* iparticle) |
36b81802 | 497 | { |
498 | // | |
499 | // Looks recursively if one of the daughters has been selected | |
500 | // | |
501 | // printf("\n Consider daughters %d:",iparticle->GetPdgCode()); | |
502 | Int_t imin = -1; | |
503 | Int_t imax = -1; | |
504 | Int_t i; | |
505 | Bool_t hasDaughters = (iparticle->GetFirstDaughter() >=0); | |
506 | Bool_t selected = kFALSE; | |
507 | if (hasDaughters) { | |
508 | imin = iparticle->GetFirstDaughter(); | |
509 | imax = iparticle->GetLastDaughter(); | |
510 | for (i = imin; i <= imax; i++){ | |
8507138f | 511 | TParticle * jparticle = (TParticle *) fParticles.At(i); |
36b81802 | 512 | Int_t ip = jparticle->GetPdgCode(); |
513 | if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) { | |
514 | selected=kTRUE; break; | |
515 | } | |
516 | if (DaughtersSelection(jparticle)) {selected=kTRUE; break; } | |
517 | } | |
518 | } else { | |
519 | return kFALSE; | |
520 | } | |
521 | return selected; | |
522 | } | |
523 | ||
524 | ||
525 | Bool_t AliGenHijing::SelectFlavor(Int_t pid) | |
526 | { | |
527 | // Select flavor of particle | |
528 | // 0: all | |
529 | // 4: charm and beauty | |
530 | // 5: beauty | |
531 | Bool_t res = 0; | |
532 | ||
533 | if (fFlavor == 0) { | |
534 | res = kTRUE; | |
535 | } else { | |
536 | Int_t ifl = TMath::Abs(pid/100); | |
537 | if (ifl > 10) ifl/=10; | |
538 | res = (fFlavor == ifl); | |
539 | } | |
540 | // | |
541 | // This part if gamma writing is inhibited | |
542 | if (fNoGammas) | |
543 | res = res && (pid != kGamma && pid != kPi0); | |
544 | // | |
545 | return res; | |
546 | } | |
547 | ||
904a753d | 548 | Bool_t AliGenHijing::Stable(const TParticle* particle) const |
36b81802 | 549 | { |
550 | // Return true for a stable particle | |
551 | // | |
552 | ||
553 | if (particle->GetFirstDaughter() < 0 ) | |
554 | { | |
555 | return kTRUE; | |
556 | } else { | |
557 | return kFALSE; | |
558 | } | |
559 | } | |
560 | ||
561 | ||
36b81802 | 562 | |
563 | void AliGenHijing::MakeHeader() | |
564 | { | |
565 | // Builds the event header, to be called after each event | |
f2f240a9 | 566 | fHeader.SetNProduced(fNprimaries); |
567 | fHeader.SetImpactParameter(fHijing->GetHINT1(19)); | |
568 | fHeader.SetTotalEnergy(fHijing->GetEATT()); | |
569 | fHeader.SetHardScatters(fHijing->GetJATT()); | |
570 | fHeader.SetParticipants(fHijing->GetNP(), fHijing->GetNT()); | |
571 | fHeader.SetCollisions(fHijing->GetN0(), | |
572 | fHijing->GetN01(), | |
573 | fHijing->GetN10(), | |
574 | fHijing->GetN11()); | |
575 | fHeader.SetSpectators(fProjectileSpecn, fProjectileSpecp, | |
576 | fTargetSpecn,fTargetSpecp); | |
577 | fHeader.SetReactionPlaneAngle(fHijing->GetHINT1(20)); | |
36b81802 | 578 | |
579 | // 4-momentum vectors of the triggered jets. | |
580 | // | |
581 | // Before final state gluon radiation. | |
582 | TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(21), | |
583 | fHijing->GetHINT1(22), | |
584 | fHijing->GetHINT1(23), | |
585 | fHijing->GetHINT1(24)); | |
586 | ||
587 | TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(31), | |
588 | fHijing->GetHINT1(32), | |
589 | fHijing->GetHINT1(33), | |
590 | fHijing->GetHINT1(34)); | |
591 | // After final state gluon radiation. | |
592 | TLorentzVector* jet3 = new TLorentzVector(fHijing->GetHINT1(26), | |
593 | fHijing->GetHINT1(27), | |
594 | fHijing->GetHINT1(28), | |
595 | fHijing->GetHINT1(29)); | |
596 | ||
597 | TLorentzVector* jet4 = new TLorentzVector(fHijing->GetHINT1(36), | |
598 | fHijing->GetHINT1(37), | |
599 | fHijing->GetHINT1(38), | |
600 | fHijing->GetHINT1(39)); | |
f2f240a9 | 601 | fHeader.SetJets(jet1, jet2, jet3, jet4); |
36b81802 | 602 | // Bookkeeping for kinematic bias |
f2f240a9 | 603 | fHeader.SetTrials(fTrials); |
36b81802 | 604 | // Event Vertex |
f2f240a9 | 605 | fHeader.SetPrimaryVertex(fVertex); |
606 | fHeader.SetInteractionTime(fEventTime); | |
607 | AddHeader(&fHeader); | |
608 | fCollisionGeometry = &fHeader; | |
36b81802 | 609 | } |
610 | ||
cf57b268 | 611 | |
36b81802 | 612 | Bool_t AliGenHijing::CheckTrigger() |
613 | { | |
614 | // Check the kinematic trigger condition | |
615 | // | |
616 | Bool_t triggered = kFALSE; | |
617 | ||
618 | if (fTrigger == 1) { | |
619 | // | |
620 | // jet-jet Trigger | |
621 | ||
622 | TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(26), | |
623 | fHijing->GetHINT1(27), | |
624 | fHijing->GetHINT1(28), | |
625 | fHijing->GetHINT1(29)); | |
626 | ||
627 | TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(36), | |
628 | fHijing->GetHINT1(37), | |
629 | fHijing->GetHINT1(38), | |
630 | fHijing->GetHINT1(39)); | |
631 | Double_t eta1 = jet1->Eta(); | |
632 | Double_t eta2 = jet2->Eta(); | |
633 | Double_t phi1 = jet1->Phi(); | |
634 | Double_t phi2 = jet2->Phi(); | |
635 | // printf("\n Trigger: %f %f %f %f", | |
636 | // fEtaMinJet, fEtaMaxJet, fPhiMinJet, fPhiMaxJet); | |
637 | if ( | |
638 | (eta1 < fEtaMaxJet && eta1 > fEtaMinJet && | |
639 | phi1 < fPhiMaxJet && phi1 > fPhiMinJet) | |
640 | || | |
641 | (eta2 < fEtaMaxJet && eta2 > fEtaMinJet && | |
642 | phi2 < fPhiMaxJet && phi2 > fPhiMinJet) | |
643 | ) | |
644 | triggered = kTRUE; | |
645 | } else if (fTrigger == 2) { | |
646 | // Gamma Jet | |
647 | // | |
8507138f | 648 | Int_t np = fParticles.GetEntriesFast(); |
36b81802 | 649 | for (Int_t i = 0; i < np; i++) { |
8507138f | 650 | TParticle* part = (TParticle*) fParticles.At(i); |
36b81802 | 651 | Int_t kf = part->GetPdgCode(); |
2d677e30 | 652 | Int_t ksp = part->GetUniqueID(); |
653 | if (kf == 22 && ksp == 40) { | |
36b81802 | 654 | Float_t phi = part->Phi(); |
655 | Float_t eta = part->Eta(); | |
656 | if (eta < fEtaMaxJet && | |
657 | eta > fEtaMinJet && | |
658 | phi < fPhiMaxJet && | |
659 | phi > fPhiMinJet) { | |
660 | triggered = 1; | |
661 | break; | |
662 | } // check phi,eta within limits | |
663 | } // direct gamma ? | |
664 | } // particle loop | |
665 | } // fTrigger == 2 | |
666 | return triggered; | |
667 | } |