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a9017e49 | 1 | /* $Id$ */ |
2 | ||
3 | #include "AliMultiplicityTask.h" | |
4 | ||
5 | #include <TStyle.h> | |
6 | #include <TSystem.h> | |
7 | #include <TCanvas.h> | |
8 | #include <TVector3.h> | |
9 | #include <TChain.h> | |
10 | #include <TFile.h> | |
11 | #include <TH2F.h> | |
12 | #include <TH3F.h> | |
13 | #include <TParticle.h> | |
14 | #include <TRandom.h> | |
15 | #include <TNtuple.h> | |
16 | #include <TObjString.h> | |
17 | #include <TF1.h> | |
18 | ||
19 | #include <AliLog.h> | |
20 | #include <AliESDVertex.h> | |
21 | #include <AliESDEvent.h> | |
22 | #include <AliStack.h> | |
23 | #include <AliHeader.h> | |
24 | #include <AliGenEventHeader.h> | |
25 | #include <AliMultiplicity.h> | |
26 | #include <AliAnalysisManager.h> | |
27 | #include <AliMCEventHandler.h> | |
28 | #include <AliMCEvent.h> | |
29 | #include <AliESDInputHandler.h> | |
30 | ||
745d6088 | 31 | #include "AliESDtrackCuts.h" |
a9017e49 | 32 | #include "AliPWG0Helper.h" |
33 | #include "dNdEta/AliMultiplicityCorrection.h" | |
34 | #include "AliCorrection.h" | |
35 | #include "AliCorrectionMatrix3D.h" | |
36 | ||
a9017e49 | 37 | ClassImp(AliMultiplicityTask) |
38 | ||
39 | AliMultiplicityTask::AliMultiplicityTask(const char* opt) : | |
40 | AliAnalysisTask("AliMultiplicityTask", ""), | |
41 | fESD(0), | |
42 | fOption(opt), | |
745d6088 | 43 | fAnalysisMode(AliPWG0Helper::kSPD), |
2fa65f52 | 44 | fReadMC(kFALSE), |
a9017e49 | 45 | fMultiplicity(0), |
46 | fEsdTrackCuts(0), | |
47 | fSystSkipParticles(kFALSE), | |
48 | fSelectProcessType(0), | |
49 | fParticleSpecies(0), | |
50 | fPtSpectrum(0), | |
51 | fOutput(0) | |
52 | { | |
53 | // | |
54 | // Constructor. Initialization of pointers | |
55 | // | |
56 | ||
57 | for (Int_t i = 0; i<4; i++) | |
58 | fParticleCorrection[i] = 0; | |
59 | ||
60 | // Define input and output slots here | |
61 | DefineInput(0, TChain::Class()); | |
62 | DefineOutput(0, TList::Class()); | |
63 | } | |
64 | ||
65 | AliMultiplicityTask::~AliMultiplicityTask() | |
66 | { | |
67 | // | |
68 | // Destructor | |
69 | // | |
70 | ||
71 | // histograms are in the output list and deleted when the output | |
72 | // list is deleted by the TSelector dtor | |
73 | ||
74 | if (fOutput) { | |
75 | delete fOutput; | |
76 | fOutput = 0; | |
77 | } | |
78 | } | |
79 | ||
80 | //________________________________________________________________________ | |
81 | void AliMultiplicityTask::ConnectInputData(Option_t *) | |
82 | { | |
83 | // Connect ESD | |
84 | // Called once | |
85 | ||
2fa65f52 | 86 | Printf("AliMultiplicityTask::ConnectInputData called"); |
87 | ||
a9017e49 | 88 | TTree* tree = dynamic_cast<TTree*> (GetInputData(0)); |
89 | if (!tree) { | |
90 | Printf("ERROR: Could not read tree from input slot 0"); | |
91 | } else { | |
92 | // Disable all branches and enable only the needed ones | |
2fa65f52 | 93 | //tree->SetBranchStatus("*", 0); |
94 | ||
a9017e49 | 95 | tree->SetBranchStatus("fTriggerMask", 1); |
96 | tree->SetBranchStatus("fSPDVertex*", 1); | |
97 | ||
745d6088 | 98 | if (fAnalysisMode == AliPWG0Helper::kSPD) |
a9017e49 | 99 | tree->SetBranchStatus("fSPDMult*", 1); |
a9017e49 | 100 | |
745d6088 | 101 | if (fAnalysisMode == AliPWG0Helper::kTPC || fAnalysisMode == AliPWG0Helper::kTPCITS) { |
a9017e49 | 102 | AliESDtrackCuts::EnableNeededBranches(tree); |
103 | tree->SetBranchStatus("fTracks.fLabel", 1); | |
2fa65f52 | 104 | } |
a9017e49 | 105 | |
a9017e49 | 106 | AliESDInputHandler *esdH = dynamic_cast<AliESDInputHandler*> (AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler()); |
107 | ||
108 | if (!esdH) { | |
109 | Printf("ERROR: Could not get ESDInputHandler"); | |
110 | } else | |
111 | fESD = esdH->GetEvent(); | |
112 | } | |
113 | } | |
114 | ||
115 | void AliMultiplicityTask::CreateOutputObjects() | |
116 | { | |
117 | // create result objects and add to output list | |
118 | ||
119 | fOutput = new TList; | |
120 | fOutput->SetOwner(); | |
121 | ||
122 | fMultiplicity = new AliMultiplicityCorrection("Multiplicity", "Multiplicity"); | |
123 | fOutput->Add(fMultiplicity); | |
124 | ||
125 | if (fOption.Contains("skip-particles")) | |
126 | { | |
127 | fSystSkipParticles = kTRUE; | |
128 | AliInfo("WARNING: Systematic study enabled. Particles will be skipped."); | |
129 | } | |
130 | ||
131 | if (fOption.Contains("particle-efficiency")) | |
132 | for (Int_t i = 0; i<4; i++) | |
133 | { | |
134 | fParticleCorrection[i] = new AliCorrection(Form("correction_%d", i), Form("correction_%d", i)); | |
135 | fOutput->Add(fParticleCorrection[i]); | |
136 | } | |
137 | ||
138 | if (fOption.Contains("only-process-type-nd")) | |
139 | fSelectProcessType = 1; | |
140 | ||
141 | if (fOption.Contains("only-process-type-sd")) | |
142 | fSelectProcessType = 2; | |
143 | ||
144 | if (fOption.Contains("only-process-type-dd")) | |
145 | fSelectProcessType = 3; | |
146 | ||
147 | if (fSelectProcessType != 0) | |
148 | AliInfo(Form("WARNING: Systematic study enabled. Only considering process type %d", fSelectProcessType)); | |
149 | ||
150 | if (fOption.Contains("pt-spectrum-hist")) | |
151 | { | |
152 | TFile* file = TFile::Open("ptspectrum_fit.root"); | |
153 | if (file) | |
154 | { | |
155 | TString subStr(fOption(fOption.Index("pt-spectrum")+17, 3)); | |
156 | TString histName(Form("ptspectrum_%s", subStr.Data())); | |
157 | AliInfo(Form("Pt-Spectrum modification. Using %s.", histName.Data())); | |
158 | fPtSpectrum = (TH1*) file->Get(histName); | |
159 | if (!fPtSpectrum) | |
160 | AliError("Histogram not found"); | |
161 | } | |
162 | else | |
163 | AliError("Could not open ptspectrum_fit.root. Pt Spectrum study could not be enabled."); | |
164 | ||
165 | if (fPtSpectrum) | |
166 | AliInfo("WARNING: Systematic study enabled. Pt spectrum will be modified"); | |
167 | } | |
168 | ||
169 | if (fOption.Contains("pt-spectrum-func")) | |
170 | { | |
171 | if (fPtSpectrum) | |
172 | { | |
173 | Printf("Using function from input list for systematic p_t study"); | |
174 | } | |
175 | else | |
176 | { | |
177 | fPtSpectrum = new TH1F("fPtSpectrum", "fPtSpectrum", 1, 0, 100); | |
178 | fPtSpectrum->SetBinContent(1, 1); | |
179 | } | |
180 | ||
181 | if (fPtSpectrum) | |
182 | AliInfo("WARNING: Systematic study enabled. Pt spectrum will be modified"); | |
183 | } | |
184 | ||
185 | if (fOption.Contains("particle-species")) { | |
186 | fParticleSpecies = new TNtuple("fParticleSpecies", "fParticleSpecies", "vtx:Pi_True:K_True:p_True:o_True:Pi_Rec:K_Rec:p_Rec:o_Rec:nolabel:doublePrim:doubleCount"); | |
187 | fOutput->Add(fParticleSpecies); | |
188 | } | |
189 | ||
190 | // TODO set seed for random generator | |
191 | } | |
192 | ||
193 | void AliMultiplicityTask::Exec(Option_t*) | |
194 | { | |
195 | // process the event | |
196 | ||
197 | // Check prerequisites | |
198 | if (!fESD) | |
199 | { | |
745d6088 | 200 | AliDebug(AliLog::kError, "ESD not available"); |
a9017e49 | 201 | return; |
202 | } | |
203 | ||
745d6088 | 204 | //MB1 definition |
205 | Bool_t eventTriggered = AliPWG0Helper::IsEventTriggered(fESD->GetTriggerMask(), AliPWG0Helper::kMB1); | |
2fa65f52 | 206 | // only FASTOR |
745d6088 | 207 | //Bool_t eventTriggered = fESD->GetTriggerMask() & 32; |
a9017e49 | 208 | |
209 | Bool_t eventVertex = AliPWG0Helper::IsVertexReconstructed(fESD->GetVertex()); | |
210 | ||
211 | // get the ESD vertex | |
212 | const AliESDVertex* vtxESD = fESD->GetVertex(); | |
213 | Double_t vtx[3]; | |
214 | vtxESD->GetXYZ(vtx); | |
215 | ||
2fa65f52 | 216 | // post the data already here |
217 | PostData(0, fOutput); | |
a9017e49 | 218 | |
219 | //const Float_t kPtCut = 0.3; | |
220 | ||
2fa65f52 | 221 | // create list of (label, eta) tuples |
222 | Int_t inputCount = 0; | |
223 | Int_t* labelArr = 0; | |
224 | Float_t* etaArr = 0; | |
745d6088 | 225 | if (fAnalysisMode == AliPWG0Helper::kSPD) |
a9017e49 | 226 | { |
2fa65f52 | 227 | // get tracklets |
228 | const AliMultiplicity* mult = fESD->GetMultiplicity(); | |
229 | if (!mult) | |
a9017e49 | 230 | { |
2fa65f52 | 231 | AliDebug(AliLog::kError, "AliMultiplicity not available"); |
232 | return; | |
a9017e49 | 233 | } |
234 | ||
2fa65f52 | 235 | labelArr = new Int_t[mult->GetNumberOfTracklets()]; |
236 | etaArr = new Float_t[mult->GetNumberOfTracklets()]; | |
237 | ||
238 | // get multiplicity from ITS tracklets | |
239 | for (Int_t i=0; i<mult->GetNumberOfTracklets(); ++i) | |
a9017e49 | 240 | { |
2fa65f52 | 241 | //printf("%d %f %f %f\n", i, mult->GetTheta(i), mult->GetPhi(i), mult->GetDeltaPhi(i)); |
a9017e49 | 242 | |
2fa65f52 | 243 | // This removes non-tracklets in PDC06 data. Very bad solution. New solution is implemented for newer data. Keeping this for compatibility. |
244 | if (mult->GetDeltaPhi(i) < -1000) | |
245 | continue; | |
a9017e49 | 246 | |
2fa65f52 | 247 | etaArr[inputCount] = mult->GetEta(i); |
3886f106 | 248 | // TODO add second label array |
249 | labelArr[inputCount] = mult->GetLabel(i, 0); | |
2fa65f52 | 250 | ++inputCount; |
251 | } | |
252 | } | |
745d6088 | 253 | else if (fAnalysisMode == AliPWG0Helper::kTPC || fAnalysisMode == AliPWG0Helper::kTPCITS) |
2fa65f52 | 254 | { |
255 | if (!fEsdTrackCuts) | |
256 | { | |
257 | AliDebug(AliLog::kError, "fESDTrackCuts not available"); | |
258 | return; | |
259 | } | |
a9017e49 | 260 | |
2fa65f52 | 261 | // get multiplicity from ESD tracks |
262 | TObjArray* list = fEsdTrackCuts->GetAcceptedTracks(fESD); | |
263 | Int_t nGoodTracks = list->GetEntries(); | |
a9017e49 | 264 | |
2fa65f52 | 265 | labelArr = new Int_t[nGoodTracks]; |
266 | etaArr = new Float_t[nGoodTracks]; | |
a9017e49 | 267 | |
2fa65f52 | 268 | // loop over esd tracks |
269 | for (Int_t i=0; i<nGoodTracks; i++) | |
a9017e49 | 270 | { |
2fa65f52 | 271 | AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (list->At(i)); |
272 | if (!esdTrack) | |
a9017e49 | 273 | { |
2fa65f52 | 274 | AliDebug(AliLog::kError, Form("ERROR: Could not retrieve track %d.", i)); |
275 | continue; | |
a9017e49 | 276 | } |
2fa65f52 | 277 | |
278 | etaArr[inputCount] = esdTrack->Eta(); | |
279 | labelArr[inputCount] = TMath::Abs(esdTrack->GetLabel()); | |
280 | ++inputCount; | |
a9017e49 | 281 | } |
282 | ||
2fa65f52 | 283 | delete list; |
284 | } | |
a9017e49 | 285 | |
2fa65f52 | 286 | // eta range for nMCTracksSpecies, nESDTracksSpecies |
287 | Float_t etaRange = -1; | |
288 | switch (fAnalysisMode) { | |
773f84dc | 289 | case AliPWG0Helper::kInvalid: break; |
745d6088 | 290 | case AliPWG0Helper::kTPC: |
291 | case AliPWG0Helper::kTPCITS: | |
292 | etaRange = 0.9; break; | |
293 | case AliPWG0Helper::kSPD: etaRange = 2.0; break; | |
2fa65f52 | 294 | } |
a9017e49 | 295 | |
2fa65f52 | 296 | if (!fReadMC) // Processing of ESD information |
297 | { | |
298 | if (eventTriggered && eventVertex) | |
299 | { | |
300 | Int_t nESDTracks05 = 0; | |
301 | Int_t nESDTracks09 = 0; | |
302 | Int_t nESDTracks15 = 0; | |
303 | Int_t nESDTracks20 = 0; | |
a9017e49 | 304 | |
2fa65f52 | 305 | for (Int_t i=0; i<inputCount; ++i) |
306 | { | |
307 | Float_t eta = etaArr[i]; | |
a9017e49 | 308 | |
2fa65f52 | 309 | if (TMath::Abs(eta) < 0.5) |
310 | nESDTracks05++; | |
a9017e49 | 311 | |
2fa65f52 | 312 | if (TMath::Abs(eta) < 0.9) |
313 | nESDTracks09++; | |
a9017e49 | 314 | |
2fa65f52 | 315 | if (TMath::Abs(eta) < 1.5) |
316 | nESDTracks15++; | |
317 | ||
318 | if (TMath::Abs(eta) < 2.0) | |
319 | nESDTracks20++; | |
a9017e49 | 320 | } |
2fa65f52 | 321 | |
322 | fMultiplicity->FillMeasured(vtx[2], nESDTracks05, nESDTracks09, nESDTracks15, nESDTracks20); | |
323 | } | |
324 | } | |
325 | else if (fReadMC) // Processing of MC information | |
326 | { | |
327 | AliMCEventHandler* eventHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler()); | |
328 | if (!eventHandler) { | |
329 | Printf("ERROR: Could not retrieve MC event handler"); | |
330 | return; | |
a9017e49 | 331 | } |
a9017e49 | 332 | |
2fa65f52 | 333 | AliMCEvent* mcEvent = eventHandler->MCEvent(); |
334 | if (!mcEvent) { | |
335 | Printf("ERROR: Could not retrieve MC event"); | |
336 | return; | |
337 | } | |
a9017e49 | 338 | |
2fa65f52 | 339 | AliStack* stack = mcEvent->Stack(); |
340 | if (!stack) | |
341 | { | |
342 | AliDebug(AliLog::kError, "Stack not available"); | |
343 | return; | |
344 | } | |
345 | ||
346 | AliHeader* header = mcEvent->Header(); | |
347 | if (!header) | |
348 | { | |
349 | AliDebug(AliLog::kError, "Header not available"); | |
350 | return; | |
351 | } | |
a9017e49 | 352 | |
2fa65f52 | 353 | Bool_t processEvent = kTRUE; |
354 | if (fSelectProcessType > 0) | |
355 | { | |
356 | // getting process information; NB: this only works for Pythia | |
6b62a9c7 | 357 | Int_t processtype = AliPWG0Helper::GetEventProcessType(header); |
a9017e49 | 358 | |
2fa65f52 | 359 | processEvent = kFALSE; |
a9017e49 | 360 | |
2fa65f52 | 361 | // non diffractive |
6b62a9c7 | 362 | if (fSelectProcessType == 1 && processtype == AliPWG0Helper::kND ) |
2fa65f52 | 363 | processEvent = kTRUE; |
a9017e49 | 364 | |
2fa65f52 | 365 | // single diffractive |
6b62a9c7 | 366 | if (fSelectProcessType == 2 && processtype == AliPWG0Helper::kSD ) |
2fa65f52 | 367 | processEvent = kTRUE; |
a9017e49 | 368 | |
2fa65f52 | 369 | // double diffractive |
6b62a9c7 | 370 | if (fSelectProcessType == 3 && processtype == AliPWG0Helper::kDD ) |
2fa65f52 | 371 | processEvent = kTRUE; |
a9017e49 | 372 | |
2fa65f52 | 373 | if (!processEvent) |
374 | AliDebug(AliLog::kDebug, Form("Skipping this event, because it is not of the requested process type (%d)", processtype)); | |
375 | } | |
a9017e49 | 376 | |
377 | // systematic study: 10% lower efficiency | |
378 | if (fSystSkipParticles && (gRandom->Uniform() < 0.1)) | |
2fa65f52 | 379 | processEvent = kFALSE; |
a9017e49 | 380 | |
2fa65f52 | 381 | if (processEvent) |
382 | { | |
383 | // get the MC vertex | |
384 | AliGenEventHeader* genHeader = header->GenEventHeader(); | |
385 | TArrayF vtxMC(3); | |
386 | genHeader->PrimaryVertex(vtxMC); | |
387 | ||
388 | // get number of tracks from MC | |
389 | // loop over mc particles | |
390 | Int_t nPrim = stack->GetNprimary(); | |
391 | Int_t nMCPart = stack->GetNtrack(); | |
392 | ||
393 | // tracks in different eta ranges | |
394 | Int_t nMCTracks05 = 0; | |
395 | Int_t nMCTracks09 = 0; | |
396 | Int_t nMCTracks15 = 0; | |
397 | Int_t nMCTracks20 = 0; | |
398 | Int_t nMCTracksAll = 0; | |
399 | ||
400 | // tracks per particle species, in |eta| < 2 (systematic study) | |
401 | Int_t nMCTracksSpecies[4]; // (pi, K, p, other) | |
402 | for (Int_t i = 0; i<4; ++i) | |
403 | nMCTracksSpecies[i] = 0; | |
404 | ||
405 | for (Int_t iMc = 0; iMc < nPrim; ++iMc) | |
406 | { | |
407 | AliDebug(AliLog::kDebug+1, Form("MC Loop: Processing particle %d.", iMc)); | |
a9017e49 | 408 | |
2fa65f52 | 409 | TParticle* particle = stack->Particle(iMc); |
a9017e49 | 410 | |
2fa65f52 | 411 | if (!particle) |
412 | { | |
413 | AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (mc loop).", iMc)); | |
414 | continue; | |
415 | } | |
a9017e49 | 416 | |
2fa65f52 | 417 | Bool_t debug = kFALSE; |
418 | if (AliPWG0Helper::IsPrimaryCharged(particle, nPrim, debug) == kFALSE) | |
419 | { | |
420 | //printf("%d) DROPPED ", iMC); | |
421 | //particle->Print(); | |
422 | continue; | |
423 | } | |
a9017e49 | 424 | |
2fa65f52 | 425 | //printf("%d) OK ", iMC); |
426 | //particle->Print(); | |
a9017e49 | 427 | |
2fa65f52 | 428 | //if (particle->Pt() < kPtCut) |
429 | // continue; | |
a9017e49 | 430 | |
2fa65f52 | 431 | Int_t particleWeight = 1; |
a9017e49 | 432 | |
2fa65f52 | 433 | Float_t pt = particle->Pt(); |
a9017e49 | 434 | |
2fa65f52 | 435 | // in case of systematic study, weight according to the change of the pt spectrum |
436 | // it cannot be just multiplied because we cannot count "half of a particle" | |
437 | // instead a random generator decides if the particle is counted twice (if value > 1) | |
438 | // or not (if value < 0) | |
439 | if (fPtSpectrum) | |
a9017e49 | 440 | { |
2fa65f52 | 441 | Int_t bin = fPtSpectrum->FindBin(pt); |
442 | if (bin > 0 && bin <= fPtSpectrum->GetNbinsX()) | |
a9017e49 | 443 | { |
2fa65f52 | 444 | Float_t factor = fPtSpectrum->GetBinContent(bin); |
445 | if (factor > 0) | |
446 | { | |
447 | Float_t random = gRandom->Uniform(); | |
448 | if (factor > 1 && random < factor - 1) | |
449 | { | |
450 | particleWeight = 2; | |
451 | } | |
452 | else if (factor < 1 && random < 1 - factor) | |
453 | particleWeight = 0; | |
454 | } | |
a9017e49 | 455 | } |
a9017e49 | 456 | } |
a9017e49 | 457 | |
2fa65f52 | 458 | //Printf("MC weight is: %d", particleWeight); |
a9017e49 | 459 | |
2fa65f52 | 460 | if (TMath::Abs(particle->Eta()) < 0.5) |
461 | nMCTracks05 += particleWeight; | |
a9017e49 | 462 | |
2fa65f52 | 463 | if (TMath::Abs(particle->Eta()) < 0.9) |
464 | nMCTracks09 += particleWeight; | |
a9017e49 | 465 | |
2fa65f52 | 466 | if (TMath::Abs(particle->Eta()) < 1.5) |
467 | nMCTracks15 += particleWeight; | |
a9017e49 | 468 | |
2fa65f52 | 469 | if (TMath::Abs(particle->Eta()) < 2.0) |
470 | nMCTracks20 += particleWeight; | |
a9017e49 | 471 | |
2fa65f52 | 472 | nMCTracksAll += particleWeight; |
a9017e49 | 473 | |
2fa65f52 | 474 | if (fParticleCorrection[0] || fParticleSpecies) |
475 | { | |
476 | Int_t id = -1; | |
477 | switch (TMath::Abs(particle->GetPdgCode())) | |
478 | { | |
479 | case 211: id = 0; break; | |
480 | case 321: id = 1; break; | |
481 | case 2212: id = 2; break; | |
482 | default: id = 3; break; | |
483 | } | |
a9017e49 | 484 | |
2fa65f52 | 485 | if (TMath::Abs(particle->Eta()) < etaRange) |
486 | nMCTracksSpecies[id]++; | |
487 | ||
488 | if (fParticleCorrection[id]) | |
489 | fParticleCorrection[id]->GetTrackCorrection()->FillGene(vtxMC[2], particle->Eta(), particle->Pt()); | |
490 | } | |
491 | } // end of mc particle | |
a9017e49 | 492 | |
2fa65f52 | 493 | fMultiplicity->FillGenerated(vtxMC[2], eventTriggered, eventVertex, (Int_t) nMCTracks05, (Int_t) nMCTracks09, (Int_t) nMCTracks15, (Int_t) nMCTracks20, (Int_t) nMCTracksAll); |
a9017e49 | 494 | |
2fa65f52 | 495 | if (eventTriggered && eventVertex) |
a9017e49 | 496 | { |
2fa65f52 | 497 | Int_t nESDTracks05 = 0; |
498 | Int_t nESDTracks09 = 0; | |
499 | Int_t nESDTracks15 = 0; | |
500 | Int_t nESDTracks20 = 0; | |
a9017e49 | 501 | |
2fa65f52 | 502 | // tracks per particle species, in |eta| < 2 (systematic study) |
503 | Int_t nESDTracksSpecies[7]; // (pi, K, p, other, nolabel, doublecount_prim, doublecount_all) | |
504 | for (Int_t i = 0; i<7; ++i) | |
505 | nESDTracksSpecies[i] = 0; | |
a9017e49 | 506 | |
2fa65f52 | 507 | Bool_t* foundPrimaries = new Bool_t[nPrim]; // to prevent double counting |
508 | for (Int_t i=0; i<nPrim; i++) | |
509 | foundPrimaries[i] = kFALSE; | |
a9017e49 | 510 | |
2fa65f52 | 511 | Bool_t* foundTracks = new Bool_t[nMCPart]; // to prevent double counting |
512 | for (Int_t i=0; i<nMCPart; i++) | |
513 | foundTracks[i] = kFALSE; | |
a9017e49 | 514 | |
2fa65f52 | 515 | for (Int_t i=0; i<inputCount; ++i) |
516 | { | |
517 | Float_t eta = etaArr[i]; | |
518 | Int_t label = labelArr[i]; | |
a9017e49 | 519 | |
2fa65f52 | 520 | Int_t particleWeight = 1; |
521 | ||
522 | // in case of systematic study, weight according to the change of the pt spectrum | |
523 | if (fPtSpectrum) | |
524 | { | |
525 | TParticle* mother = 0; | |
526 | ||
527 | // preserve label for later | |
528 | Int_t labelCopy = label; | |
529 | if (labelCopy >= 0) | |
530 | labelCopy = AliPWG0Helper::FindPrimaryMotherLabel(stack, labelCopy); | |
531 | if (labelCopy >= 0) | |
532 | mother = stack->Particle(labelCopy); | |
533 | ||
534 | // in case of pt study we do not count particles w/o label, because they cannot be scaled | |
535 | if (!mother) | |
536 | continue; | |
537 | ||
538 | // it cannot be just multiplied because we cannot count "half of a particle" | |
539 | // instead a random generator decides if the particle is counted twice (if value > 1) | |
540 | // or not (if value < 0) | |
541 | Int_t bin = fPtSpectrum->FindBin(mother->Pt()); | |
542 | if (bin > 0 && bin <= fPtSpectrum->GetNbinsX()) | |
543 | { | |
544 | Float_t factor = fPtSpectrum->GetBinContent(bin); | |
545 | if (factor > 0) | |
546 | { | |
547 | Float_t random = gRandom->Uniform(); | |
548 | if (factor > 1 && random < factor - 1) | |
549 | { | |
550 | particleWeight = 2; | |
551 | } | |
552 | else if (factor < 1 && random < 1 - factor) | |
553 | particleWeight = 0; | |
554 | } | |
555 | } | |
556 | } | |
557 | ||
558 | //Printf("ESD weight is: %d", particleWeight); | |
559 | ||
560 | if (TMath::Abs(eta) < 0.5) | |
561 | nESDTracks05 += particleWeight; | |
a9017e49 | 562 | |
2fa65f52 | 563 | if (TMath::Abs(eta) < 0.9) |
564 | nESDTracks09 += particleWeight; | |
a9017e49 | 565 | |
2fa65f52 | 566 | if (TMath::Abs(eta) < 1.5) |
567 | nESDTracks15 += particleWeight; | |
a9017e49 | 568 | |
2fa65f52 | 569 | if (TMath::Abs(eta) < 2.0) |
570 | nESDTracks20 += particleWeight; | |
a9017e49 | 571 | |
a9017e49 | 572 | |
2fa65f52 | 573 | if (fParticleCorrection[0] || fParticleSpecies) |
574 | { | |
575 | Int_t motherLabel = -1; | |
576 | TParticle* mother = 0; | |
577 | ||
578 | // find mother | |
579 | if (label >= 0) | |
580 | motherLabel = AliPWG0Helper::FindPrimaryMotherLabel(stack, label); | |
581 | if (motherLabel >= 0) | |
582 | mother = stack->Particle(motherLabel); | |
583 | ||
584 | if (!mother) | |
585 | { | |
586 | // count tracks that did not have a label | |
587 | if (TMath::Abs(eta) < etaRange) | |
588 | nESDTracksSpecies[4]++; | |
589 | continue; | |
590 | } | |
591 | ||
592 | // get particle type (pion, proton, kaon, other) | |
593 | Int_t id = -1; | |
594 | switch (TMath::Abs(mother->GetPdgCode())) | |
595 | { | |
596 | case 211: id = 0; break; | |
597 | case 321: id = 1; break; | |
598 | case 2212: id = 2; break; | |
599 | default: id = 3; break; | |
600 | } | |
601 | ||
602 | // double counting is ok for particle ratio study | |
603 | if (TMath::Abs(eta) < etaRange) | |
604 | nESDTracksSpecies[id]++; | |
605 | ||
606 | // double counting is not ok for efficiency study | |
607 | ||
608 | // check if we already counted this particle, this way distinguishes double counted particles (bug/artefact in tracking) or double counted primaries due to secondaries (physics) | |
609 | if (foundTracks[label]) | |
610 | { | |
611 | if (TMath::Abs(eta) < etaRange) | |
612 | nESDTracksSpecies[6]++; | |
613 | continue; | |
614 | } | |
615 | foundTracks[label] = kTRUE; | |
616 | ||
617 | // particle (primary) already counted? | |
618 | if (foundPrimaries[motherLabel]) | |
619 | { | |
620 | if (TMath::Abs(eta) < etaRange) | |
621 | nESDTracksSpecies[5]++; | |
622 | continue; | |
623 | } | |
624 | foundPrimaries[motherLabel] = kTRUE; | |
625 | ||
626 | if (fParticleCorrection[id]) | |
627 | fParticleCorrection[id]->GetTrackCorrection()->FillMeas(vtxMC[2], mother->Eta(), mother->Pt()); | |
628 | } | |
629 | } | |
630 | ||
631 | delete[] foundTracks; | |
632 | delete[] foundPrimaries; | |
a9017e49 | 633 | |
2fa65f52 | 634 | if ((Int_t) nMCTracks20 == 0 && nESDTracks20 > 3) |
635 | printf("WARNING: Event has %d generated and %d reconstructed...\n", nMCTracks20, nESDTracks20); | |
a9017e49 | 636 | |
2fa65f52 | 637 | // fill response matrix using vtxMC (best guess) |
638 | fMultiplicity->FillCorrection(vtxMC[2], nMCTracks05, nMCTracks09, nMCTracks15, nMCTracks20, nMCTracksAll, nESDTracks05, nESDTracks09, nESDTracks15, nESDTracks20); | |
a9017e49 | 639 | |
2fa65f52 | 640 | fMultiplicity->FillMeasured(vtx[2], nESDTracks05, nESDTracks09, nESDTracks15, nESDTracks20); |
641 | ||
642 | if (fParticleSpecies) | |
643 | fParticleSpecies->Fill(vtxMC[2], nMCTracksSpecies[0], nMCTracksSpecies[1], nMCTracksSpecies[2], nMCTracksSpecies[3], nESDTracksSpecies[0], nESDTracksSpecies[1], nESDTracksSpecies[2], nESDTracksSpecies[3], nESDTracksSpecies[4], nESDTracksSpecies[5], nESDTracksSpecies[6]); | |
644 | } | |
645 | } | |
646 | } | |
a9017e49 | 647 | |
2fa65f52 | 648 | delete etaArr; |
649 | delete labelArr; | |
a9017e49 | 650 | } |
651 | ||
652 | void AliMultiplicityTask::Terminate(Option_t *) | |
653 | { | |
654 | // The Terminate() function is the last function to be called during | |
655 | // a query. It always runs on the client, it can be used to present | |
656 | // the results graphically or save the results to file. | |
657 | ||
658 | fOutput = dynamic_cast<TList*> (GetOutputData(0)); | |
659 | if (!fOutput) { | |
660 | Printf("ERROR: fOutput not available"); | |
661 | return; | |
662 | } | |
663 | ||
664 | fMultiplicity = dynamic_cast<AliMultiplicityCorrection*> (fOutput->FindObject("Multiplicity")); | |
665 | for (Int_t i = 0; i < 4; ++i) | |
666 | fParticleCorrection[i] = dynamic_cast<AliCorrection*> (fOutput->FindObject(Form("correction_%d", i))); | |
667 | fParticleSpecies = dynamic_cast<TNtuple*> (fOutput->FindObject("fParticleSpecies")); | |
668 | ||
669 | if (!fMultiplicity) | |
670 | { | |
671 | AliDebug(AliLog::kError, Form("ERROR: Histograms not available %p", (void*) fMultiplicity)); | |
672 | return; | |
673 | } | |
674 | ||
675 | TFile* file = TFile::Open("multiplicityMC.root", "RECREATE"); | |
676 | ||
677 | fMultiplicity->SaveHistograms(); | |
678 | for (Int_t i = 0; i < 4; ++i) | |
679 | if (fParticleCorrection[i]) | |
680 | fParticleCorrection[i]->SaveHistograms(); | |
681 | if (fParticleSpecies) | |
682 | fParticleSpecies->Write(); | |
683 | ||
684 | TObjString option(fOption); | |
685 | option.Write(); | |
686 | ||
687 | file->Close(); | |
688 | ||
689 | Printf("Writting result to multiplicityMC.root"); | |
690 | } |