]>
Commit | Line | Data |
---|---|---|
1a52e0ed | 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 | ||
16 | ||
17 | // Generator using DPMJET as an external generator | |
18 | // The main DPMJET options are accessable for the user through this interface. | |
19 | // Uses the TDPMjet implementation of TGenerator. | |
20 | ||
21 | #include <TDPMjet.h> | |
22 | #include <TRandom.h> | |
23 | #include <TArrayI.h> | |
24 | #include <TParticle.h> | |
25 | #include <TGraph.h> | |
26 | #include <TDatabasePDG.h> | |
27 | #include <TParticlePDG.h> | |
28 | #include <TParticleClassPDG.h> | |
29 | #include <TPDGCode.h> | |
30 | #include <TLorentzVector.h> | |
07c71c2e | 31 | #include <TClonesArray.h> |
9dcc0beb | 32 | #include "AliRunLoader.h" |
1a52e0ed | 33 | #include "AliGenDPMjet.h" |
34 | #include "AliGenDPMjetEventHeader.h" | |
1a52e0ed | 35 | #include "AliRun.h" |
f2ba02a4 | 36 | #include "AliDpmJetRndm.h" |
9dcc0beb | 37 | #include "AliHeader.h" |
38 | #include "AliStack.h" | |
39 | #include "AliMC.h" | |
1a52e0ed | 40 | |
f97d4a8e | 41 | ClassImp(AliGenDPMjet) |
1a52e0ed | 42 | |
43 | //______________________________________________________________________________ | |
44 | AliGenDPMjet::AliGenDPMjet() | |
f97d4a8e | 45 | :AliGenMC(), |
46 | fBeamEn(2750.), | |
f97d4a8e | 47 | fMinImpactParam(0.), |
48 | fMaxImpactParam(5.), | |
49 | fICentr(0), | |
50 | fSelectAll(0), | |
51 | fFlavor(0), | |
52 | fTrials(0), | |
53 | fSpectators(1), | |
54 | fSpecn(0), | |
55 | fSpecp(0), | |
56 | fDPMjet(0), | |
f97d4a8e | 57 | fNoGammas(0), |
58 | fLHC(0), | |
9c97cedd | 59 | fPi0Decay(1), |
717765ce | 60 | fDecayAll(0), |
f97d4a8e | 61 | fGenImpPar(0.), |
3b50c39e | 62 | fProcess(kDpmMb), |
63 | fTriggerMultiplicity(0), | |
64 | fTriggerMultiplicityEta(0), | |
65 | fTriggerMultiplicityPtMin(0) | |
1a52e0ed | 66 | { |
67 | // Constructor | |
e7c989e4 | 68 | fEnergyCMS = 5500.; |
f2ba02a4 | 69 | AliDpmJetRndm::SetDpmJetRandom(GetRandom()); |
1a52e0ed | 70 | } |
71 | ||
72 | ||
73 | //______________________________________________________________________________ | |
74 | AliGenDPMjet::AliGenDPMjet(Int_t npart) | |
f97d4a8e | 75 | :AliGenMC(npart), |
76 | fBeamEn(2750.), | |
f97d4a8e | 77 | fMinImpactParam(0.), |
78 | fMaxImpactParam(5.), | |
79 | fICentr(0), | |
80 | fSelectAll(0), | |
81 | fFlavor(0), | |
82 | fTrials(0), | |
83 | fSpectators(1), | |
84 | fSpecn(0), | |
85 | fSpecp(0), | |
86 | fDPMjet(0), | |
f97d4a8e | 87 | fNoGammas(0), |
88 | fLHC(0), | |
9c97cedd | 89 | fPi0Decay(1), |
717765ce | 90 | fDecayAll(0), |
f97d4a8e | 91 | fGenImpPar(0.), |
3b50c39e | 92 | fProcess(kDpmMb), |
93 | fTriggerMultiplicity(0), | |
94 | fTriggerMultiplicityEta(0), | |
95 | fTriggerMultiplicityPtMin(0) | |
1a52e0ed | 96 | { |
97 | // Default PbPb collisions at 5. 5 TeV | |
98 | // | |
e7c989e4 | 99 | fEnergyCMS = 5500.; |
1a52e0ed | 100 | fName = "DPMJET"; |
101 | fTitle= "Particle Generator using DPMJET"; | |
1a52e0ed | 102 | SetTarget(); |
103 | SetProjectile(); | |
f2ba02a4 | 104 | fVertex.Set(3); |
f2ba02a4 | 105 | AliDpmJetRndm::SetDpmJetRandom(GetRandom()); |
1a52e0ed | 106 | } |
107 | ||
ba758f5a | 108 | AliGenDPMjet::AliGenDPMjet(const AliGenDPMjet &/*Dpmjet*/) |
f97d4a8e | 109 | :AliGenMC(), |
110 | fBeamEn(2750.), | |
f97d4a8e | 111 | fMinImpactParam(0.), |
112 | fMaxImpactParam(5.), | |
113 | fICentr(0), | |
114 | fSelectAll(0), | |
115 | fFlavor(0), | |
116 | fTrials(0), | |
117 | fSpectators(1), | |
118 | fSpecn(0), | |
119 | fSpecp(0), | |
120 | fDPMjet(0), | |
f97d4a8e | 121 | fNoGammas(0), |
122 | fLHC(0), | |
9c97cedd | 123 | fPi0Decay(1), |
717765ce | 124 | fDecayAll(0), |
f97d4a8e | 125 | fGenImpPar(0.), |
3b50c39e | 126 | fProcess(kDpmMb), |
127 | fTriggerMultiplicity(0), | |
128 | fTriggerMultiplicityEta(0), | |
129 | fTriggerMultiplicityPtMin(0) | |
ba758f5a | 130 | { |
f97d4a8e | 131 | // Dummy copy constructor |
e7c989e4 | 132 | fEnergyCMS = 5500.; |
ba758f5a | 133 | } |
1a52e0ed | 134 | |
135 | //______________________________________________________________________________ | |
136 | AliGenDPMjet::~AliGenDPMjet() | |
137 | { | |
138 | // Destructor | |
1a52e0ed | 139 | } |
1a52e0ed | 140 | //______________________________________________________________________________ |
141 | void AliGenDPMjet::Init() | |
142 | { | |
143 | // Initialization | |
144 | ||
e67e0fb7 | 145 | SetMC(new TDPMjet(fProcess, fAProjectile, fZProjectile, fATarget, fZTarget, |
1a52e0ed | 146 | fBeamEn,fEnergyCMS)); |
147 | ||
35c87559 | 148 | fDPMjet=(TDPMjet*) fMCEvGen; |
1a52e0ed | 149 | // |
150 | // **** Flag to force central production | |
151 | // fICentr=1. central production forced | |
152 | // fICentr<0 && fICentr>-100 -> bmin = fMinImpactParam, bmax = fMaxImpactParam | |
153 | // fICentr<-99 -> fraction of x-sec. = XSFRAC | |
154 | // fICentr=-1. -> evaporation/fzc suppressed | |
155 | // fICentr<-1. -> evaporation/fzc suppressed | |
cd19c617 | 156 | if (fAProjectile == 1 && TMath::Abs(fZProjectile == 1)) fDPMjet->SetfIdp(1); |
ba758f5a | 157 | |
1a52e0ed | 158 | fDPMjet->SetfFCentr(fICentr); |
e67e0fb7 | 159 | fDPMjet->SetbRange(fMinImpactParam, fMaxImpactParam); |
f97d4a8e | 160 | fDPMjet->SetPi0Decay(fPi0Decay); |
717765ce | 161 | fDPMjet->SetDecayAll(fDecayAll); |
1a52e0ed | 162 | // |
163 | // Initialize DPMjet | |
164 | // | |
165 | fDPMjet->Initialize(); | |
1a52e0ed | 166 | } |
167 | ||
168 | ||
169 | //______________________________________________________________________________ | |
170 | void AliGenDPMjet::Generate() | |
171 | { | |
172 | // Generate one event | |
173 | ||
174 | Float_t polar[3] = {0,0,0}; | |
175 | Float_t origin[3] = {0,0,0}; | |
e67e0fb7 | 176 | Float_t p[3]; |
1a52e0ed | 177 | Float_t tof; |
178 | ||
179 | // converts from mm/c to s | |
180 | const Float_t kconv = 0.001/2.999792458e8; | |
181 | Int_t nt = 0; | |
182 | Int_t jev = 0; | |
e67e0fb7 | 183 | Int_t kf, ks, imo; |
1a52e0ed | 184 | kf = 0; |
1a52e0ed | 185 | fTrials = 0; |
e67e0fb7 | 186 | // Set collision vertex position |
187 | if (fVertexSmear == kPerEvent) Vertex(); | |
1a52e0ed | 188 | |
189 | while(1) | |
190 | { | |
191 | // Generate one event | |
192 | // -------------------------------------------------------------------------- | |
193 | fSpecn = 0; | |
194 | fSpecp = 0; | |
195 | // -------------------------------------------------------------------------- | |
196 | fDPMjet->GenerateEvent(); | |
9c97cedd | 197 | |
1a52e0ed | 198 | fTrials++; |
199 | ||
8507138f | 200 | fDPMjet->ImportParticles(&fParticles,"All"); |
1a52e0ed | 201 | if (fLHC) Boost(); |
202 | ||
203 | // Temporaneo | |
204 | fGenImpPar = fDPMjet->GetBImpac(); | |
41cc7c18 | 205 | |
206 | if(TMath::Abs(fXingAngleY) > 1.e-10) BeamCrossAngle(); | |
207 | ||
8507138f | 208 | Int_t np = fParticles.GetEntriesFast(); |
3b50c39e | 209 | // |
210 | // Multiplicity Trigger | |
211 | if (fTriggerMultiplicity > 0) { | |
212 | Int_t multiplicity = 0; | |
213 | for (Int_t i = 0; i < np; i++) { | |
214 | TParticle * iparticle = (TParticle *) fParticles.At(i); | |
215 | ||
216 | Int_t statusCode = iparticle->GetStatusCode(); | |
217 | ||
218 | // Initial state particle | |
219 | if (statusCode != 1) | |
220 | continue; | |
221 | // eta cut | |
222 | if (fTriggerMultiplicityEta > 0 && TMath::Abs(iparticle->Eta()) > fTriggerMultiplicityEta) | |
223 | continue; | |
224 | // pt cut | |
225 | if (iparticle->Pt() < fTriggerMultiplicityPtMin) | |
226 | continue; | |
227 | ||
228 | TParticlePDG* pdgPart = iparticle->GetPDG(); | |
229 | if (pdgPart && pdgPart->Charge() == 0) | |
230 | continue; | |
231 | ++multiplicity; | |
232 | } | |
233 | // | |
234 | // | |
235 | if (multiplicity < fTriggerMultiplicity) continue; | |
236 | Printf("Triggered on event with multiplicity of %d >= %d", multiplicity, fTriggerMultiplicity); | |
237 | } | |
238 | ||
239 | Int_t nc = 0; | |
240 | if (np == 0) continue; | |
241 | ||
1a52e0ed | 242 | Int_t i; |
243 | Int_t* newPos = new Int_t[np]; | |
244 | Int_t* pSelected = new Int_t[np]; | |
245 | ||
246 | for (i = 0; i<np; i++) { | |
247 | newPos[i] = i; | |
248 | pSelected[i] = 0; | |
249 | } | |
250 | ||
1a52e0ed | 251 | // First select parent particles |
252 | ||
253 | for (i = 0; i<np; i++) { | |
8507138f | 254 | TParticle *iparticle = (TParticle *) fParticles.At(i); |
1a52e0ed | 255 | |
256 | // Is this a parent particle ? | |
257 | ||
258 | if (Stable(iparticle)) continue; | |
259 | ||
260 | Bool_t selected = kTRUE; | |
261 | Bool_t hasSelectedDaughters = kFALSE; | |
262 | ||
263 | kf = iparticle->GetPdgCode(); | |
cd19c617 | 264 | if (kf == 92 || kf == 99999) continue; |
1a52e0ed | 265 | ks = iparticle->GetStatusCode(); |
266 | // No initial state partons | |
267 | if (ks==21) continue; | |
268 | ||
269 | if (!fSelectAll) selected = KinematicSelection(iparticle, 0) && | |
270 | SelectFlavor(kf); | |
9c97cedd | 271 | |
272 | ||
1a52e0ed | 273 | hasSelectedDaughters = DaughtersSelection(iparticle); |
274 | ||
9c97cedd | 275 | |
1a52e0ed | 276 | // Put particle on the stack if it is either selected or |
277 | // it is the mother of at least one seleted particle | |
278 | ||
279 | if (selected || hasSelectedDaughters) { | |
280 | nc++; | |
281 | pSelected[i] = 1; | |
282 | } // selected | |
283 | } // particle loop parents | |
284 | ||
285 | // Now select the final state particles | |
286 | ||
287 | ||
288 | for (i=0; i<np; i++) { | |
8507138f | 289 | TParticle *iparticle = (TParticle *) fParticles.At(i); |
1a52e0ed | 290 | |
291 | // Is this a final state particle ? | |
292 | ||
293 | if (!Stable(iparticle)) continue; | |
294 | ||
295 | Bool_t selected = kTRUE; | |
296 | kf = iparticle->GetPdgCode(); | |
297 | ks = iparticle->GetStatusCode(); | |
298 | ||
299 | // -------------------------------------------------------------------------- | |
300 | // Count spectator neutrons and protons (ks == 13, 14) | |
301 | if(ks == 13 || ks == 14){ | |
302 | if(kf == kNeutron) fSpecn += 1; | |
303 | if(kf == kProton) fSpecp += 1; | |
304 | } | |
305 | // -------------------------------------------------------------------------- | |
306 | ||
307 | if (!fSelectAll) { | |
308 | selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf); | |
309 | if (!fSpectators && selected) selected = (ks == 13 || ks == 14); | |
310 | } | |
311 | ||
312 | // Put particle on the stack if selected | |
313 | ||
314 | if (selected) { | |
315 | nc++; | |
316 | pSelected[i] = 1; | |
317 | } // selected | |
318 | } // particle loop final state | |
319 | ||
320 | // Write particles to stack | |
321 | ||
322 | for (i = 0; i<np; i++) { | |
8507138f | 323 | TParticle * iparticle = (TParticle *) fParticles.At(i); |
1a52e0ed | 324 | Bool_t hasMother = (iparticle->GetFirstMother()>=0); |
1a52e0ed | 325 | if (pSelected[i]) { |
326 | ||
327 | kf = iparticle->GetPdgCode(); | |
1a52e0ed | 328 | ks = iparticle->GetStatusCode(); |
329 | ||
330 | p[0] = iparticle->Px(); | |
331 | p[1] = iparticle->Py(); | |
332 | p[2] = iparticle->Pz(); | |
e67e0fb7 | 333 | origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm] |
334 | origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm] | |
335 | origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm] | |
336 | ||
1a52e0ed | 337 | tof = kconv*iparticle->T(); |
338 | ||
339 | imo = -1; | |
340 | TParticle* mother = 0; | |
341 | if (hasMother) { | |
342 | imo = iparticle->GetFirstMother(); | |
8507138f | 343 | mother = (TParticle *) fParticles.At(imo); |
cd19c617 | 344 | imo = (mother->GetPdgCode() != 92 && mother->GetPdgCode() != 99999) ? newPos[imo] : -1; |
1a52e0ed | 345 | } // if has mother |
346 | ||
9c97cedd | 347 | |
348 | ||
1a52e0ed | 349 | Bool_t tFlag = (fTrackIt && (ks == 1)); |
642f15cf | 350 | PushTrack(tFlag,imo,kf,p,origin,polar,tof,kPNoProcess,nt, 1., ks); |
1a52e0ed | 351 | KeepTrack(nt); |
352 | newPos[i] = nt; | |
353 | } // if selected | |
354 | } // particle loop | |
355 | delete[] newPos; | |
356 | delete[] pSelected; | |
1a52e0ed | 357 | if (nc>0) { |
358 | jev += nc; | |
359 | if (jev >= fNpart || fNpart == -1) { | |
1a52e0ed | 360 | break; |
361 | } | |
1a52e0ed | 362 | } |
363 | } // event loop | |
364 | MakeHeader(); | |
365 | SetHighWaterMark(nt); | |
366 | } | |
367 | ||
1a52e0ed | 368 | //______________________________________________________________________________ |
369 | Bool_t AliGenDPMjet::DaughtersSelection(TParticle* iparticle) | |
370 | { | |
371 | // | |
372 | // Looks recursively if one of the daughters has been selected | |
373 | // | |
374 | // printf("\n Consider daughters %d:",iparticle->GetPdgCode()); | |
375 | Int_t imin = -1; | |
376 | Int_t imax = -1; | |
377 | Int_t i; | |
378 | Bool_t hasDaughters = (iparticle->GetFirstDaughter() >=0); | |
379 | Bool_t selected = kFALSE; | |
380 | if (hasDaughters) { | |
381 | imin = iparticle->GetFirstDaughter(); | |
382 | imax = iparticle->GetLastDaughter(); | |
383 | for (i = imin; i <= imax; i++){ | |
8507138f | 384 | TParticle * jparticle = (TParticle *) fParticles.At(i); |
1a52e0ed | 385 | Int_t ip = jparticle->GetPdgCode(); |
386 | if (KinematicSelection(jparticle,0)&&SelectFlavor(ip)) { | |
387 | selected=kTRUE; break; | |
388 | } | |
389 | if (DaughtersSelection(jparticle)) {selected=kTRUE; break; } | |
390 | } | |
391 | } else { | |
392 | return kFALSE; | |
393 | } | |
394 | return selected; | |
395 | } | |
396 | ||
397 | ||
398 | ||
399 | //______________________________________________________________________________ | |
400 | Bool_t AliGenDPMjet::SelectFlavor(Int_t pid) | |
401 | { | |
402 | // Select flavor of particle | |
403 | // 0: all | |
404 | // 4: charm and beauty | |
405 | // 5: beauty | |
406 | Bool_t res = 0; | |
407 | ||
408 | if (fFlavor == 0) { | |
409 | res = kTRUE; | |
410 | } else { | |
411 | Int_t ifl = TMath::Abs(pid/100); | |
412 | if (ifl > 10) ifl/=10; | |
413 | res = (fFlavor == ifl); | |
414 | } | |
415 | // | |
416 | // This part if gamma writing is inhibited | |
417 | if (fNoGammas) | |
418 | res = res && (pid != kGamma && pid != kPi0); | |
419 | // | |
420 | return res; | |
421 | } | |
422 | ||
423 | //______________________________________________________________________________ | |
424 | Bool_t AliGenDPMjet::Stable(TParticle* particle) | |
425 | { | |
426 | // Return true for a stable particle | |
427 | // | |
428 | ||
429 | // if (particle->GetFirstDaughter() < 0 ) return kTRUE; | |
430 | if (particle->GetStatusCode() == 1) return kTRUE; | |
431 | else return kFALSE; | |
432 | ||
433 | } | |
434 | ||
1a52e0ed | 435 | //______________________________________________________________________________ |
436 | void AliGenDPMjet::MakeHeader() | |
437 | { | |
438 | // Builds the event header, to be called after each event | |
439 | AliGenEventHeader* header = new AliGenDPMjetEventHeader("DPMJET"); | |
440 | ((AliGenDPMjetEventHeader*) header)->SetNProduced(fDPMjet->GetNumStablePc()); | |
441 | ((AliGenDPMjetEventHeader*) header)->SetImpactParameter(fDPMjet->GetBImpac()); | |
442 | ((AliGenDPMjetEventHeader*) header)->SetTotalEnergy(fDPMjet->GetTotEnergy()); | |
1a52e0ed | 443 | ((AliGenDPMjetEventHeader*) header)->SetParticipants(fDPMjet->GetfIp(), |
444 | fDPMjet->GetfIt()); | |
9dcc0beb | 445 | ((AliGenDPMjetEventHeader*) header)->SetProcessType(fDPMjet->GetProcessCode()); |
1a52e0ed | 446 | // Bookkeeping for kinematic bias |
447 | ((AliGenDPMjetEventHeader*) header)->SetTrials(fTrials); | |
448 | // Event Vertex | |
f2ba02a4 | 449 | header->SetPrimaryVertex(fVertex); |
1a52e0ed | 450 | gAlice->SetGenEventHeader(header); |
d2593e7a | 451 | AddHeader(header); |
1a52e0ed | 452 | } |
453 | ||
9dcc0beb | 454 | void AliGenDPMjet::AddHeader(AliGenEventHeader* header) |
455 | { | |
456 | // Add header to container or runloader | |
457 | if (fContainer) { | |
458 | fContainer->AddHeader(header); | |
459 | } else { | |
33c3c91a | 460 | AliRunLoader::Instance()->GetHeader()->SetGenEventHeader(header); |
9dcc0beb | 461 | } |
462 | } | |
1a52e0ed | 463 | |
464 | ||
465 | //______________________________________________________________________________ | |
ba758f5a | 466 | AliGenDPMjet& AliGenDPMjet::operator=(const AliGenDPMjet& /*rhs*/) |
1a52e0ed | 467 | { |
468 | // Assignment operator | |
469 | return *this; | |
470 | } | |
471 | ||
472 | ||
d2593e7a | 473 | void AliGenDPMjet::FinishRun() |
474 | { | |
475 | // Print run statistics | |
476 | fDPMjet->Dt_Dtuout(); | |
477 | } | |
478 | ||
479 | ||
1a52e0ed | 480 | |
481 | //______________________________________________________________________________ |