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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), | |
48 | fDecaysOff(1), | |
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), | |
57 | fPtHardMin(0.), | |
58 | fPtHardMax(1.e4), | |
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), | |
76 | fNoHeavyQuarks(kFALSE) | |
36b81802 | 77 | { |
fc7e1b1c | 78 | // Constructor |
e7c989e4 | 79 | fEnergyCMS = 5500.; |
fc7e1b1c | 80 | AliHijingRndm::SetHijingRandom(GetRandom()); |
36b81802 | 81 | } |
82 | ||
83 | AliGenHijing::AliGenHijing(Int_t npart) | |
9d89c88d | 84 | :AliGenMC(npart), |
85 | fFrame("CMS"), | |
86 | fMinImpactParam(0.), | |
87 | fMaxImpactParam(5.), | |
88 | fKeep(0), | |
89 | fQuench(1), | |
90 | fShadowing(1), | |
91 | fDecaysOff(1), | |
92 | fTrigger(0), | |
93 | fEvaluate(0), | |
94 | fSelectAll(0), | |
95 | fFlavor(0), | |
9d89c88d | 96 | fKineBias(0.), |
97 | fTrials(0), | |
98 | fXsection(0.), | |
99 | fHijing(0), | |
100 | fPtHardMin(0.), | |
101 | fPtHardMax(1.e4), | |
102 | fSpectators(1), | |
103 | fDsigmaDb(0), | |
104 | fDnDb(0), | |
105 | fPtMinJet(-2.5), | |
106 | fEtaMinJet(-20.), | |
107 | fEtaMaxJet(+20.), | |
108 | fPhiMinJet(0.), | |
109 | fPhiMaxJet(2. * TMath::Pi()), | |
110 | fRadiation(3), | |
111 | fSimpleJet(kFALSE), | |
112 | fNoGammas(kFALSE), | |
113 | fProjectileSpecn(0), | |
114 | fProjectileSpecp(0), | |
115 | fTargetSpecn(0), | |
116 | fTargetSpecp(0), | |
117 | fLHC(kFALSE), | |
118 | fRandomPz(kFALSE), | |
119 | fNoHeavyQuarks(kFALSE) | |
36b81802 | 120 | { |
121 | // Default PbPb collisions at 5. 5 TeV | |
122 | // | |
e7c989e4 | 123 | fEnergyCMS = 5500.; |
36b81802 | 124 | fName = "Hijing"; |
125 | fTitle= "Particle Generator using HIJING"; | |
36b81802 | 126 | // |
36b81802 | 127 | // |
128 | // Set random number generator | |
7cdba479 | 129 | AliHijingRndm::SetHijingRandom(GetRandom()); |
36b81802 | 130 | } |
131 | ||
36b81802 | 132 | AliGenHijing::~AliGenHijing() |
133 | { | |
134 | // Destructor | |
135 | if ( fDsigmaDb) delete fDsigmaDb; | |
136 | if ( fDnDb) delete fDnDb; | |
36b81802 | 137 | } |
138 | ||
139 | void AliGenHijing::Init() | |
140 | { | |
141 | // Initialisation | |
142 | fFrame.Resize(8); | |
143 | fTarget.Resize(8); | |
144 | fProjectile.Resize(8); | |
145 | ||
146 | SetMC(new THijing(fEnergyCMS, fFrame, fProjectile, fTarget, | |
147 | fAProjectile, fZProjectile, fATarget, fZTarget, | |
148 | fMinImpactParam, fMaxImpactParam)); | |
149 | ||
b88f5cea | 150 | fHijing=(THijing*) fMCEvGen; |
36b81802 | 151 | fHijing->SetIHPR2(2, fRadiation); |
152 | fHijing->SetIHPR2(3, fTrigger); | |
153 | fHijing->SetIHPR2(6, fShadowing); | |
154 | fHijing->SetIHPR2(12, fDecaysOff); | |
155 | fHijing->SetIHPR2(21, fKeep); | |
156 | fHijing->SetHIPR1(10, fPtMinJet); | |
157 | fHijing->SetHIPR1(50, fSimpleJet); | |
158 | // | |
159 | // Quenching | |
160 | // | |
161 | // | |
162 | // fQuench = 0: no quenching | |
163 | // fQuench = 1: hijing default | |
164 | // fQuench = 2: new LHC parameters for HIPR1(11) and HIPR1(14) | |
165 | // fQuench = 3: new RHIC parameters for HIPR1(11) and HIPR1(14) | |
166 | // fQuench = 4: new LHC parameters with log(e) dependence | |
167 | // fQuench = 5: new RHIC parameters with log(e) dependence | |
168 | fHijing->SetIHPR2(50, 0); | |
169 | if (fQuench > 0) | |
170 | fHijing->SetIHPR2(4, 1); | |
171 | else | |
172 | fHijing->SetIHPR2(4, 0); | |
173 | // New LHC parameters from Xin-Nian Wang | |
174 | if (fQuench == 2) { | |
175 | fHijing->SetHIPR1(14, 1.1); | |
176 | fHijing->SetHIPR1(11, 3.7); | |
177 | } else if (fQuench == 3) { | |
178 | fHijing->SetHIPR1(14, 0.20); | |
179 | fHijing->SetHIPR1(11, 2.5); | |
180 | } else if (fQuench == 4) { | |
181 | fHijing->SetIHPR2(50, 1); | |
182 | fHijing->SetHIPR1(14, 4.*0.34); | |
183 | fHijing->SetHIPR1(11, 3.7); | |
184 | } else if (fQuench == 5) { | |
185 | fHijing->SetIHPR2(50, 1); | |
186 | fHijing->SetHIPR1(14, 0.34); | |
187 | fHijing->SetHIPR1(11, 2.5); | |
188 | } | |
189 | ||
f82795ff | 190 | // |
191 | // Heavy quarks | |
192 | // | |
193 | if (fNoHeavyQuarks) { | |
194 | fHijing->SetIHPR2(49, 1); | |
195 | } else { | |
196 | fHijing->SetIHPR2(49, 0); | |
197 | } | |
198 | ||
36b81802 | 199 | |
cc463e4a | 200 | AliGenMC::Init(); |
36b81802 | 201 | |
202 | // | |
203 | // Initialize Hijing | |
204 | // | |
205 | fHijing->Initialize(); | |
206 | // | |
207 | if (fEvaluate) EvaluateCrossSections(); | |
208 | // | |
209 | } | |
210 | ||
211 | void AliGenHijing::Generate() | |
212 | { | |
213 | // Generate one event | |
214 | ||
215 | Float_t polar[3] = {0,0,0}; | |
216 | Float_t origin[3] = {0,0,0}; | |
217 | Float_t origin0[3] = {0,0,0}; | |
0c0c6204 | 218 | Float_t p[3]; |
36b81802 | 219 | Float_t tof; |
220 | ||
221 | // converts from mm/c to s | |
14bca1e5 | 222 | const Float_t kconv = 0.001/2.99792458e8; |
36b81802 | 223 | // |
224 | Int_t nt = 0; | |
225 | Int_t jev = 0; | |
2d677e30 | 226 | Int_t j, kf, ks, ksp, imo; |
36b81802 | 227 | kf = 0; |
228 | ||
229 | ||
230 | ||
231 | fTrials = 0; | |
e60d2969 | 232 | |
36b81802 | 233 | for (j = 0;j < 3; j++) origin0[j] = fOrigin[j]; |
234 | if(fVertexSmear == kPerEvent) { | |
0c0c6204 | 235 | Vertex(); |
236 | for (j=0; j < 3; j++) origin0[j] = fVertex[j]; | |
237 | } | |
238 | ||
b25b821e | 239 | |
240 | Float_t sign = (fRandomPz && (Rndm() < 0.5))? -1. : 1.; | |
36b81802 | 241 | while(1) |
242 | { | |
243 | // Generate one event | |
244 | // -------------------------------------------------------------------------- | |
f0c86dd6 | 245 | fProjectileSpecn = 0; |
246 | fProjectileSpecp = 0; | |
b25b821e | 247 | fTargetSpecn = 0; |
248 | fTargetSpecp = 0; | |
36b81802 | 249 | // -------------------------------------------------------------------------- |
250 | fHijing->GenerateEvent(); | |
251 | fTrials++; | |
e60d2969 | 252 | fNprimaries = 0; |
8507138f | 253 | fHijing->ImportParticles(&fParticles,"All"); |
36b81802 | 254 | if (fTrigger != kNoTrigger) { |
255 | if (!CheckTrigger()) continue; | |
256 | } | |
71ea527c | 257 | if (fLHC) Boost(); |
36b81802 | 258 | |
259 | ||
8507138f | 260 | Int_t np = fParticles.GetEntriesFast(); |
36b81802 | 261 | Int_t nc = 0; |
262 | if (np == 0 ) continue; | |
263 | Int_t i; | |
264 | Int_t* newPos = new Int_t[np]; | |
265 | Int_t* pSelected = new Int_t[np]; | |
266 | ||
267 | for (i = 0; i < np; i++) { | |
268 | newPos[i] = i; | |
269 | pSelected[i] = 0; | |
270 | } | |
271 | ||
272 | // Get event vertex | |
273 | // | |
8507138f | 274 | TParticle * iparticle = (TParticle *) fParticles.At(0); |
0c0c6204 | 275 | fVertex[0] = origin0[0]; |
276 | fVertex[1] = origin0[1]; | |
277 | fVertex[2] = origin0[2]; | |
36b81802 | 278 | |
279 | // | |
280 | // First select parent particles | |
281 | // | |
282 | ||
283 | for (i = 0; i < np; i++) { | |
8507138f | 284 | iparticle = (TParticle *) fParticles.At(i); |
36b81802 | 285 | |
286 | // Is this a parent particle ? | |
287 | if (Stable(iparticle)) continue; | |
288 | // | |
289 | Bool_t selected = kTRUE; | |
290 | Bool_t hasSelectedDaughters = kFALSE; | |
291 | ||
292 | ||
293 | kf = iparticle->GetPdgCode(); | |
294 | ks = iparticle->GetStatusCode(); | |
295 | if (kf == 92) continue; | |
296 | ||
297 | if (!fSelectAll) selected = KinematicSelection(iparticle, 0) && | |
298 | SelectFlavor(kf); | |
299 | hasSelectedDaughters = DaughtersSelection(iparticle); | |
300 | // | |
301 | // Put particle on the stack if it is either selected or | |
302 | // it is the mother of at least one seleted particle | |
303 | // | |
304 | if (selected || hasSelectedDaughters) { | |
305 | nc++; | |
306 | pSelected[i] = 1; | |
307 | } // selected | |
308 | } // particle loop parents | |
309 | // | |
310 | // Now select the final state particles | |
311 | // | |
312 | ||
313 | for (i = 0; i<np; i++) { | |
c4998efa | 314 | iparticle = (TParticle *) fParticles.At(i); |
36b81802 | 315 | // Is this a final state particle ? |
316 | if (!Stable(iparticle)) continue; | |
317 | ||
318 | Bool_t selected = kTRUE; | |
319 | kf = iparticle->GetPdgCode(); | |
320 | ks = iparticle->GetStatusCode(); | |
2d677e30 | 321 | ksp = iparticle->GetUniqueID(); |
36b81802 | 322 | |
323 | // -------------------------------------------------------------------------- | |
324 | // Count spectator neutrons and protons | |
2d677e30 | 325 | if(ksp == 0 || ksp == 1){ |
f0c86dd6 | 326 | if(kf == kNeutron) fProjectileSpecn += 1; |
327 | if(kf == kProton) fProjectileSpecp += 1; | |
328 | } | |
2d677e30 | 329 | else if(ksp == 10 || ksp == 11){ |
f0c86dd6 | 330 | if(kf == kNeutron) fTargetSpecn += 1; |
331 | if(kf == kProton) fTargetSpecp += 1; | |
36b81802 | 332 | } |
333 | // -------------------------------------------------------------------------- | |
334 | // | |
335 | if (!fSelectAll) { | |
336 | selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf); | |
2d677e30 | 337 | if (!fSpectators && selected) selected = (ksp != 0 && ksp != 1 && ksp != 10 |
338 | && ksp != 11); | |
36b81802 | 339 | } |
340 | // | |
341 | // Put particle on the stack if selected | |
342 | // | |
343 | if (selected) { | |
344 | nc++; | |
345 | pSelected[i] = 1; | |
346 | } // selected | |
347 | } // particle loop final state | |
3439da17 | 348 | |
36b81802 | 349 | // |
3439da17 | 350 | // Time of the interactions |
351 | Float_t tInt = 0.; | |
352 | if (fPileUpTimeWindow > 0.) tInt = fPileUpTimeWindow * (2. * gRandom->Rndm() - 1.); | |
353 | ||
36b81802 | 354 | // |
3439da17 | 355 | // Write particles to stack |
356 | ||
36b81802 | 357 | for (i = 0; i<np; i++) { |
c4998efa | 358 | iparticle = (TParticle *) fParticles.At(i); |
36b81802 | 359 | Bool_t hasMother = (iparticle->GetFirstMother() >=0); |
360 | Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0); | |
36b81802 | 361 | if (pSelected[i]) { |
362 | kf = iparticle->GetPdgCode(); | |
363 | ks = iparticle->GetStatusCode(); | |
364 | p[0] = iparticle->Px(); | |
365 | p[1] = iparticle->Py(); | |
b25b821e | 366 | p[2] = iparticle->Pz() * sign; |
36b81802 | 367 | origin[0] = origin0[0]+iparticle->Vx()/10; |
368 | origin[1] = origin0[1]+iparticle->Vy()/10; | |
369 | origin[2] = origin0[2]+iparticle->Vz()/10; | |
2b757990 | 370 | // tof = kconv * iparticle->T() + sign * origin0[2] / 3.e10; |
371 | tof = kconv * iparticle->T(); | |
3439da17 | 372 | if (fPileUpTimeWindow > 0.) tof += tInt; |
373 | ||
36b81802 | 374 | imo = -1; |
375 | TParticle* mother = 0; | |
376 | if (hasMother) { | |
377 | imo = iparticle->GetFirstMother(); | |
8507138f | 378 | mother = (TParticle *) fParticles.At(imo); |
e57522c0 | 379 | imo = (mother->GetPdgCode() != 92) ? newPos[imo] : -1; |
36b81802 | 380 | } // if has mother |
381 | Bool_t tFlag = (fTrackIt && !hasDaughter); | |
3439da17 | 382 | PushTrack(tFlag,imo,kf,p,origin,polar,tof,kPNoProcess,nt, 1., ks); |
e60d2969 | 383 | fNprimaries++; |
36b81802 | 384 | KeepTrack(nt); |
385 | newPos[i] = nt; | |
386 | } // if selected | |
387 | } // particle loop | |
388 | delete[] newPos; | |
389 | delete[] pSelected; | |
390 | ||
3f4e7ad8 | 391 | AliInfo(Form("\n I've put %i particles on the stack \n",nc)); |
36b81802 | 392 | if (nc > 0) { |
393 | jev += nc; | |
394 | if (jev >= fNpart || fNpart == -1) { | |
395 | fKineBias = Float_t(fNpart)/Float_t(fTrials); | |
3f4e7ad8 | 396 | AliInfo(Form("\n Trials: %i %i %i\n",fTrials, fNpart, jev)); |
36b81802 | 397 | break; |
398 | } | |
399 | } | |
400 | } // event loop | |
401 | MakeHeader(); | |
402 | SetHighWaterMark(nt); | |
403 | } | |
404 | ||
405 | void AliGenHijing::KeepFullEvent() | |
406 | { | |
407 | fKeep=1; | |
408 | } | |
409 | ||
410 | void AliGenHijing::EvaluateCrossSections() | |
411 | { | |
412 | // Glauber Calculation of geometrical x-section | |
413 | // | |
414 | Float_t xTot = 0.; // barn | |
415 | Float_t xTotHard = 0.; // barn | |
416 | Float_t xPart = 0.; // barn | |
417 | Float_t xPartHard = 0.; // barn | |
418 | Float_t sigmaHard = 0.1; // mbarn | |
419 | Float_t bMin = 0.; | |
420 | Float_t bMax = fHijing->GetHIPR1(34)+fHijing->GetHIPR1(35); | |
421 | const Float_t kdib = 0.2; | |
422 | Int_t kMax = Int_t((bMax-bMin)/kdib)+1; | |
423 | ||
424 | ||
425 | printf("\n Projectile Radius (fm): %f \n",fHijing->GetHIPR1(34)); | |
426 | printf("\n Target Radius (fm): %f \n",fHijing->GetHIPR1(35)); | |
427 | Int_t i; | |
428 | Float_t oldvalue= 0.; | |
429 | ||
430 | Float_t* b = new Float_t[kMax]; | |
431 | Float_t* si1 = new Float_t[kMax]; | |
432 | Float_t* si2 = new Float_t[kMax]; | |
433 | ||
434 | for (i = 0; i < kMax; i++) | |
435 | { | |
436 | Float_t xb = bMin+i*kdib; | |
437 | Float_t ov; | |
438 | ov=fHijing->Profile(xb); | |
439 | Float_t gb = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*(1.-TMath::Exp(-fHijing->GetHINT1(12)*ov)); | |
440 | Float_t gbh = 2.*0.01*fHijing->GetHIPR1(40)*kdib*xb*sigmaHard*ov; | |
441 | xTot+=gb; | |
442 | xTotHard += gbh; | |
443 | printf("profile %f %f %f\n", xb, ov, fHijing->GetHINT1(12)); | |
444 | ||
445 | if (xb > fMinImpactParam && xb < fMaxImpactParam) | |
446 | { | |
447 | xPart += gb; | |
448 | xPartHard += gbh; | |
449 | } | |
450 | ||
451 | if(oldvalue) if ((xTot-oldvalue)/oldvalue<0.0001) break; | |
452 | oldvalue = xTot; | |
453 | printf("\n Total cross section (barn): %d %f %f \n",i, xb, xTot); | |
454 | printf("\n Hard cross section (barn): %d %f %f \n\n",i, xb, xTotHard); | |
455 | if (i>0) { | |
456 | si1[i] = gb/kdib; | |
457 | si2[i] = gbh/gb; | |
458 | b[i] = xb; | |
459 | } | |
460 | } | |
461 | ||
462 | printf("\n Total cross section (barn): %f \n",xTot); | |
463 | printf("\n Hard cross section (barn): %f \n \n",xTotHard); | |
464 | printf("\n Partial cross section (barn): %f %f \n",xPart, xPart/xTot*100.); | |
465 | printf("\n Partial hard cross section (barn): %f %f \n",xPartHard, xPartHard/xTotHard*100.); | |
466 | ||
467 | // Store result as a graph | |
468 | b[0] = 0; | |
469 | si1[0] = 0; | |
470 | si2[0]=si2[1]; | |
471 | ||
472 | fDsigmaDb = new TGraph(i, b, si1); | |
473 | fDnDb = new TGraph(i, b, si2); | |
474 | } | |
475 | ||
476 | Bool_t AliGenHijing::DaughtersSelection(TParticle* iparticle) | |
477 | { | |
478 | // | |
479 | // Looks recursively if one of the daughters has been selected | |
480 | // | |
481 | // printf("\n Consider daughters %d:",iparticle->GetPdgCode()); | |
482 | Int_t imin = -1; | |
483 | Int_t imax = -1; | |
484 | Int_t i; | |
485 | Bool_t hasDaughters = (iparticle->GetFirstDaughter() >=0); | |
486 | Bool_t selected = kFALSE; | |
487 | if (hasDaughters) { | |
488 | imin = iparticle->GetFirstDaughter(); | |
489 | imax = iparticle->GetLastDaughter(); | |
490 | for (i = imin; i <= imax; i++){ | |
8507138f | 491 | TParticle * jparticle = (TParticle *) fParticles.At(i); |
36b81802 | 492 | Int_t ip = jparticle->GetPdgCode(); |
493 | if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) { | |
494 | selected=kTRUE; break; | |
495 | } | |
496 | if (DaughtersSelection(jparticle)) {selected=kTRUE; break; } | |
497 | } | |
498 | } else { | |
499 | return kFALSE; | |
500 | } | |
501 | return selected; | |
502 | } | |
503 | ||
504 | ||
505 | Bool_t AliGenHijing::SelectFlavor(Int_t pid) | |
506 | { | |
507 | // Select flavor of particle | |
508 | // 0: all | |
509 | // 4: charm and beauty | |
510 | // 5: beauty | |
511 | Bool_t res = 0; | |
512 | ||
513 | if (fFlavor == 0) { | |
514 | res = kTRUE; | |
515 | } else { | |
516 | Int_t ifl = TMath::Abs(pid/100); | |
517 | if (ifl > 10) ifl/=10; | |
518 | res = (fFlavor == ifl); | |
519 | } | |
520 | // | |
521 | // This part if gamma writing is inhibited | |
522 | if (fNoGammas) | |
523 | res = res && (pid != kGamma && pid != kPi0); | |
524 | // | |
525 | return res; | |
526 | } | |
527 | ||
14cae7e9 | 528 | Bool_t AliGenHijing::Stable(TParticle* particle) const |
36b81802 | 529 | { |
530 | // Return true for a stable particle | |
531 | // | |
532 | ||
533 | if (particle->GetFirstDaughter() < 0 ) | |
534 | { | |
535 | return kTRUE; | |
536 | } else { | |
537 | return kFALSE; | |
538 | } | |
539 | } | |
540 | ||
541 | ||
36b81802 | 542 | |
543 | void AliGenHijing::MakeHeader() | |
544 | { | |
545 | // Builds the event header, to be called after each event | |
546 | AliGenEventHeader* header = new AliGenHijingEventHeader("Hijing"); | |
e60d2969 | 547 | ((AliGenHijingEventHeader*) header)->SetNProduced(fNprimaries); |
36b81802 | 548 | ((AliGenHijingEventHeader*) header)->SetImpactParameter(fHijing->GetHINT1(19)); |
549 | ((AliGenHijingEventHeader*) header)->SetTotalEnergy(fHijing->GetEATT()); | |
550 | ((AliGenHijingEventHeader*) header)->SetHardScatters(fHijing->GetJATT()); | |
551 | ((AliGenHijingEventHeader*) header)->SetParticipants(fHijing->GetNP(), fHijing->GetNT()); | |
552 | ((AliGenHijingEventHeader*) header)->SetCollisions(fHijing->GetN0(), | |
553 | fHijing->GetN01(), | |
554 | fHijing->GetN10(), | |
555 | fHijing->GetN11()); | |
f0c86dd6 | 556 | ((AliGenHijingEventHeader*) header)->SetSpectators(fProjectileSpecn, fProjectileSpecp, |
557 | fTargetSpecn,fTargetSpecp); | |
3c0c211c | 558 | ((AliGenHijingEventHeader*) header)->SetReactionPlaneAngle(fHijing->GetHINT1(20)); |
559 | ||
560 | ||
36b81802 | 561 | |
562 | // 4-momentum vectors of the triggered jets. | |
563 | // | |
564 | // Before final state gluon radiation. | |
565 | TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(21), | |
566 | fHijing->GetHINT1(22), | |
567 | fHijing->GetHINT1(23), | |
568 | fHijing->GetHINT1(24)); | |
569 | ||
570 | TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(31), | |
571 | fHijing->GetHINT1(32), | |
572 | fHijing->GetHINT1(33), | |
573 | fHijing->GetHINT1(34)); | |
574 | // After final state gluon radiation. | |
575 | TLorentzVector* jet3 = new TLorentzVector(fHijing->GetHINT1(26), | |
576 | fHijing->GetHINT1(27), | |
577 | fHijing->GetHINT1(28), | |
578 | fHijing->GetHINT1(29)); | |
579 | ||
580 | TLorentzVector* jet4 = new TLorentzVector(fHijing->GetHINT1(36), | |
581 | fHijing->GetHINT1(37), | |
582 | fHijing->GetHINT1(38), | |
583 | fHijing->GetHINT1(39)); | |
584 | ((AliGenHijingEventHeader*) header)->SetJets(jet1, jet2, jet3, jet4); | |
585 | // Bookkeeping for kinematic bias | |
586 | ((AliGenHijingEventHeader*) header)->SetTrials(fTrials); | |
587 | // Event Vertex | |
0c0c6204 | 588 | header->SetPrimaryVertex(fVertex); |
cf57b268 | 589 | AddHeader(header); |
36b81802 | 590 | fCollisionGeometry = (AliGenHijingEventHeader*) header; |
591 | } | |
592 | ||
cf57b268 | 593 | |
36b81802 | 594 | Bool_t AliGenHijing::CheckTrigger() |
595 | { | |
596 | // Check the kinematic trigger condition | |
597 | // | |
598 | Bool_t triggered = kFALSE; | |
599 | ||
600 | if (fTrigger == 1) { | |
601 | // | |
602 | // jet-jet Trigger | |
603 | ||
604 | TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(26), | |
605 | fHijing->GetHINT1(27), | |
606 | fHijing->GetHINT1(28), | |
607 | fHijing->GetHINT1(29)); | |
608 | ||
609 | TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(36), | |
610 | fHijing->GetHINT1(37), | |
611 | fHijing->GetHINT1(38), | |
612 | fHijing->GetHINT1(39)); | |
613 | Double_t eta1 = jet1->Eta(); | |
614 | Double_t eta2 = jet2->Eta(); | |
615 | Double_t phi1 = jet1->Phi(); | |
616 | Double_t phi2 = jet2->Phi(); | |
617 | // printf("\n Trigger: %f %f %f %f", | |
618 | // fEtaMinJet, fEtaMaxJet, fPhiMinJet, fPhiMaxJet); | |
619 | if ( | |
620 | (eta1 < fEtaMaxJet && eta1 > fEtaMinJet && | |
621 | phi1 < fPhiMaxJet && phi1 > fPhiMinJet) | |
622 | || | |
623 | (eta2 < fEtaMaxJet && eta2 > fEtaMinJet && | |
624 | phi2 < fPhiMaxJet && phi2 > fPhiMinJet) | |
625 | ) | |
626 | triggered = kTRUE; | |
627 | } else if (fTrigger == 2) { | |
628 | // Gamma Jet | |
629 | // | |
8507138f | 630 | Int_t np = fParticles.GetEntriesFast(); |
36b81802 | 631 | for (Int_t i = 0; i < np; i++) { |
8507138f | 632 | TParticle* part = (TParticle*) fParticles.At(i); |
36b81802 | 633 | Int_t kf = part->GetPdgCode(); |
2d677e30 | 634 | Int_t ksp = part->GetUniqueID(); |
635 | if (kf == 22 && ksp == 40) { | |
36b81802 | 636 | Float_t phi = part->Phi(); |
637 | Float_t eta = part->Eta(); | |
638 | if (eta < fEtaMaxJet && | |
639 | eta > fEtaMinJet && | |
640 | phi < fPhiMaxJet && | |
641 | phi > fPhiMinJet) { | |
642 | triggered = 1; | |
643 | break; | |
644 | } // check phi,eta within limits | |
645 | } // direct gamma ? | |
646 | } // particle loop | |
647 | } // fTrigger == 2 | |
648 | return triggered; | |
649 | } |