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43a9a462 | 1 | /* $Id$ */ |
2 | ||
3 | #include "AliMultiplicityMCSelector.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> | |
43a9a462 | 11 | #include <TH2F.h> |
0a173978 | 12 | #include <TH3F.h> |
43a9a462 | 13 | #include <TParticle.h> |
447c325d | 14 | #include <TRandom.h> |
15 | #include <TNtuple.h> | |
43a9a462 | 16 | |
17 | #include <AliLog.h> | |
18 | #include <AliESD.h> | |
19 | #include <AliStack.h> | |
0a173978 | 20 | #include <AliHeader.h> |
21 | #include <AliGenEventHeader.h> | |
22 | #include <AliMultiplicity.h> | |
43a9a462 | 23 | |
24 | #include "esdTrackCuts/AliESDtrackCuts.h" | |
25 | #include "AliPWG0Helper.h" | |
447c325d | 26 | #include "AliPWG0depHelper.h" |
0a173978 | 27 | #include "dNdEta/AliMultiplicityCorrection.h" |
447c325d | 28 | #include "AliCorrection.h" |
29 | #include "AliCorrectionMatrix3D.h" | |
43a9a462 | 30 | |
cfc19dd5 | 31 | //#define TPCMEASUREMENT |
32 | #define ITSMEASUREMENT | |
33 | ||
43a9a462 | 34 | ClassImp(AliMultiplicityMCSelector) |
35 | ||
36 | AliMultiplicityMCSelector::AliMultiplicityMCSelector() : | |
37 | AliSelectorRL(), | |
0a173978 | 38 | fMultiplicity(0), |
447c325d | 39 | fEsdTrackCuts(0), |
40 | fSystSkipParticles(kFALSE), | |
41 | fSelectProcessType(0), | |
42 | fParticleSpecies(0) | |
43a9a462 | 43 | { |
44 | // | |
45 | // Constructor. Initialization of pointers | |
46 | // | |
447c325d | 47 | |
48 | for (Int_t i = 0; i<4; i++) | |
49 | fParticleCorrection[i] = 0; | |
43a9a462 | 50 | } |
51 | ||
52 | AliMultiplicityMCSelector::~AliMultiplicityMCSelector() | |
53 | { | |
54 | // | |
55 | // Destructor | |
56 | // | |
57 | ||
58 | // histograms are in the output list and deleted when the output | |
59 | // list is deleted by the TSelector dtor | |
60 | } | |
61 | ||
62 | void AliMultiplicityMCSelector::Begin(TTree* tree) | |
63 | { | |
64 | // Begin function | |
65 | ||
66 | AliSelectorRL::Begin(tree); | |
67 | ||
68 | ReadUserObjects(tree); | |
69 | } | |
70 | ||
71 | void AliMultiplicityMCSelector::ReadUserObjects(TTree* tree) | |
72 | { | |
73 | // read the user objects, called from slavebegin and begin | |
74 | ||
75 | if (!fEsdTrackCuts && fInput) | |
76 | fEsdTrackCuts = dynamic_cast<AliESDtrackCuts*> (fInput->FindObject("AliESDtrackCuts")); | |
77 | ||
78 | if (!fEsdTrackCuts && tree) | |
79 | fEsdTrackCuts = dynamic_cast<AliESDtrackCuts*> (tree->GetUserInfo()->FindObject("AliESDtrackCuts")); | |
80 | ||
81 | if (!fEsdTrackCuts) | |
82 | AliDebug(AliLog::kError, "ERROR: Could not read EsdTrackCuts from input list."); | |
83 | } | |
84 | ||
85 | void AliMultiplicityMCSelector::SlaveBegin(TTree* tree) | |
86 | { | |
87 | // The SlaveBegin() function is called after the Begin() function. | |
88 | // When running with PROOF SlaveBegin() is called on each slave server. | |
89 | // The tree argument is deprecated (on PROOF 0 is passed). | |
90 | ||
91 | AliSelector::SlaveBegin(tree); | |
92 | ||
93 | ReadUserObjects(tree); | |
94 | ||
0a173978 | 95 | fMultiplicity = new AliMultiplicityCorrection("Multiplicity", "Multiplicity"); |
447c325d | 96 | |
97 | TString option(GetOption()); | |
98 | if (option.Contains("skip-particles")) | |
99 | { | |
100 | fSystSkipParticles = kTRUE; | |
101 | AliInfo("WARNING: Systematic study enabled. Particles will be skipped."); | |
102 | } | |
103 | ||
104 | if (option.Contains("particle-efficiency")) | |
105 | for (Int_t i = 0; i<4; i++) | |
106 | fParticleCorrection[i] = new AliCorrection(Form("correction_%d", i), Form("correction_%d", i)); | |
107 | ||
108 | if (option.Contains("only-process-type-nd")) | |
109 | fSelectProcessType = 1; | |
110 | ||
111 | if (option.Contains("only-process-type-sd")) | |
112 | fSelectProcessType = 2; | |
113 | ||
114 | if (option.Contains("only-process-type-dd")) | |
115 | fSelectProcessType = 3; | |
116 | ||
117 | if (fSelectProcessType != 0) | |
118 | AliInfo(Form("WARNING: Systematic study enabled. Only considering process type %d", fSelectProcessType)); | |
119 | ||
120 | if (option.Contains("particle-species")) | |
121 | fParticleSpecies = new TNtuple("fParticleSpecies", "fParticleSpecies", "Pi_True:K_True:p_True:o_True:Pi_Rec:K_Rec:p_Rec:o_Rec"); | |
0a173978 | 122 | } |
123 | ||
124 | void AliMultiplicityMCSelector::Init(TTree* tree) | |
125 | { | |
126 | // read the user objects | |
127 | ||
128 | AliSelectorRL::Init(tree); | |
129 | ||
b477f4f2 | 130 | // enable only the needed branches |
131 | if (tree) | |
0a173978 | 132 | { |
133 | tree->SetBranchStatus("*", 0); | |
134 | tree->SetBranchStatus("fTriggerMask", 1); | |
135 | tree->SetBranchStatus("fSPDVertex*", 1); | |
dd701109 | 136 | |
137 | #ifdef ITSMEASUREMENT | |
138 | tree->SetBranchStatus("fSPDMult*", 1); | |
139 | #endif | |
43a9a462 | 140 | |
cfc19dd5 | 141 | #ifdef TPCMEASUREMENT |
142 | AliESDtrackCuts::EnableNeededBranches(tree); | |
143 | #endif | |
b477f4f2 | 144 | } |
43a9a462 | 145 | } |
146 | ||
147 | Bool_t AliMultiplicityMCSelector::Process(Long64_t entry) | |
148 | { | |
149 | // The Process() function is called for each entry in the tree (or possibly | |
150 | // keyed object in the case of PROOF) to be processed. The entry argument | |
151 | // specifies which entry in the currently loaded tree is to be processed. | |
152 | // It can be passed to either TTree::GetEntry() or TBranch::GetEntry() | |
153 | // to read either all or the required parts of the data. When processing | |
154 | // keyed objects with PROOF, the object is already loaded and is available | |
155 | // via the fObject pointer. | |
156 | // | |
157 | // This function should contain the "body" of the analysis. It can contain | |
158 | // simple or elaborate selection criteria, run algorithms on the data | |
159 | // of the event and typically fill histograms. | |
160 | ||
161 | // WARNING when a selector is used with a TChain, you must use | |
162 | // the pointer to the current TTree to call GetEntry(entry). | |
163 | // The entry is always the local entry number in the current tree. | |
164 | // Assuming that fTree is the pointer to the TChain being processed, | |
165 | // use fTree->GetTree()->GetEntry(entry). | |
166 | ||
167 | if (AliSelectorRL::Process(entry) == kFALSE) | |
168 | return kFALSE; | |
169 | ||
170 | // Check prerequisites | |
171 | if (!fESD) | |
172 | { | |
173 | AliDebug(AliLog::kError, "ESD branch not available"); | |
174 | return kFALSE; | |
175 | } | |
176 | ||
177 | if (!fEsdTrackCuts) | |
178 | { | |
179 | AliDebug(AliLog::kError, "fESDTrackCuts not available"); | |
180 | return kFALSE; | |
181 | } | |
182 | ||
0a173978 | 183 | AliHeader* header = GetHeader(); |
184 | if (!header) | |
185 | { | |
186 | AliDebug(AliLog::kError, "Header not available"); | |
187 | return kFALSE; | |
188 | } | |
189 | ||
43a9a462 | 190 | AliStack* stack = GetStack(); |
191 | if (!stack) | |
192 | { | |
193 | AliDebug(AliLog::kError, "Stack not available"); | |
194 | return kFALSE; | |
195 | } | |
196 | ||
447c325d | 197 | if (fSelectProcessType > 0) |
198 | { | |
199 | // getting process information; NB: this only works for Pythia | |
200 | Int_t processtype = AliPWG0depHelper::GetPythiaEventProcessType(header); | |
201 | ||
202 | Bool_t processEvent = kFALSE; | |
203 | ||
204 | // non diffractive | |
205 | if (fSelectProcessType == 1 && processtype !=92 && processtype !=93 && processtype != 94) | |
206 | processEvent = kTRUE; | |
207 | ||
208 | // single diffractive | |
209 | if (fSelectProcessType == 2 && (processtype == 92 || processtype == 93)) | |
210 | processEvent = kTRUE; | |
211 | ||
212 | // double diffractive | |
213 | if (fSelectProcessType == 3 && processtype == 94) | |
214 | processEvent = kTRUE; | |
215 | ||
216 | if (!processEvent) | |
217 | { | |
218 | AliDebug(AliLog::kDebug, Form("Skipping this event, because it is not of the requested process type (%d)", processtype)); | |
219 | return kTRUE; | |
220 | } | |
221 | } | |
222 | ||
cfc19dd5 | 223 | Bool_t eventTriggered = AliPWG0Helper::IsEventTriggered(fESD); |
447c325d | 224 | eventTriggered = kTRUE; // no generated trigger for the simulated events |
cfc19dd5 | 225 | Bool_t eventVertex = AliPWG0Helper::IsVertexReconstructed(fESD); |
43a9a462 | 226 | |
0a173978 | 227 | // get the ESD vertex |
228 | const AliESDVertex* vtxESD = fESD->GetVertex(); | |
229 | Double_t vtx[3]; | |
230 | vtxESD->GetXYZ(vtx); | |
231 | ||
232 | // get the MC vertex | |
233 | AliGenEventHeader* genHeader = header->GenEventHeader(); | |
234 | TArrayF vtxMC(3); | |
235 | genHeader->PrimaryVertex(vtxMC); | |
236 | ||
237 | // get tracklets | |
238 | const AliMultiplicity* mult = fESD->GetMultiplicity(); | |
239 | if (!mult) | |
240 | { | |
241 | AliDebug(AliLog::kError, "AliMultiplicity not available"); | |
242 | return kFALSE; | |
243 | } | |
43a9a462 | 244 | |
0a173978 | 245 | //const Float_t kPtCut = 0.3; |
43a9a462 | 246 | |
247 | // get number of tracks from MC | |
248 | // loop over mc particles | |
249 | Int_t nPrim = stack->GetNprimary(); | |
0a173978 | 250 | |
251 | // tracks in different eta ranges | |
252 | Int_t nMCTracks05 = 0; | |
253 | Int_t nMCTracks10 = 0; | |
254 | Int_t nMCTracks15 = 0; | |
255 | Int_t nMCTracks20 = 0; | |
256 | Int_t nMCTracksAll = 0; | |
257 | ||
447c325d | 258 | // tracks per particle species, in |eta| < 2 (systematic study) |
259 | Int_t nMCTracksSpecies[4]; // (pi, K, p, other) | |
260 | for (Int_t i = 0; i<4; ++i) | |
261 | nMCTracksSpecies[i] = 0; | |
262 | ||
43a9a462 | 263 | for (Int_t iMc = 0; iMc < nPrim; ++iMc) |
264 | { | |
265 | AliDebug(AliLog::kDebug+1, Form("MC Loop: Processing particle %d.", iMc)); | |
266 | ||
267 | TParticle* particle = stack->Particle(iMc); | |
268 | ||
269 | if (!particle) | |
270 | { | |
271 | AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (mc loop).", iMc)); | |
272 | continue; | |
273 | } | |
274 | ||
447c325d | 275 | Bool_t debug = kFALSE; |
276 | if (AliPWG0Helper::IsPrimaryCharged(particle, nPrim, debug) == kFALSE) | |
277 | { | |
278 | //printf("%d) DROPPED ", iMC); | |
279 | //particle->Print(); | |
43a9a462 | 280 | continue; |
447c325d | 281 | } |
282 | ||
283 | //printf("%d) OK ", iMC); | |
284 | //particle->Print(); | |
43a9a462 | 285 | |
0a173978 | 286 | //if (particle->Pt() < kPtCut) |
287 | // continue; | |
43a9a462 | 288 | |
0a173978 | 289 | if (TMath::Abs(particle->Eta()) < 0.5) |
290 | nMCTracks05++; | |
43a9a462 | 291 | |
0a173978 | 292 | if (TMath::Abs(particle->Eta()) < 1.0) |
293 | nMCTracks10++; | |
294 | ||
295 | if (TMath::Abs(particle->Eta()) < 1.5) | |
296 | nMCTracks15++; | |
297 | ||
298 | if (TMath::Abs(particle->Eta()) < 2.0) | |
299 | nMCTracks20++; | |
300 | ||
301 | nMCTracksAll++; | |
447c325d | 302 | |
303 | Int_t id = -1; | |
304 | switch (TMath::Abs(particle->GetPdgCode())) | |
305 | { | |
306 | case 211: id = 0; break; | |
307 | case 321: id = 1; break; | |
308 | case 2212: id = 2; break; | |
309 | default: id = 3; break; | |
310 | } | |
311 | if (TMath::Abs(particle->Eta()) < 2.0) | |
312 | nMCTracksSpecies[id]++; | |
313 | if (fParticleCorrection[id]) | |
314 | fParticleCorrection[id]->GetTrackCorrection()->FillGene(vtxMC[2], particle->Eta(), particle->Pt()); | |
43a9a462 | 315 | }// end of mc particle |
316 | ||
cfc19dd5 | 317 | fMultiplicity->FillGenerated(vtxMC[2], eventTriggered, eventVertex, nMCTracks05, nMCTracks10, nMCTracks15, nMCTracks20, nMCTracksAll); |
318 | ||
319 | if (!eventTriggered || !eventVertex) | |
320 | return kTRUE; | |
0a173978 | 321 | |
322 | Int_t nESDTracks05 = 0; | |
323 | Int_t nESDTracks10 = 0; | |
324 | Int_t nESDTracks15 = 0; | |
325 | Int_t nESDTracks20 = 0; | |
326 | ||
447c325d | 327 | // tracks per particle species, in |eta| < 2 (systematic study) |
328 | Int_t nESDTracksSpecies[4]; // (pi, K, p, other) | |
329 | for (Int_t i = 0; i<4; ++i) | |
330 | nESDTracksSpecies[i] = 0; | |
331 | ||
cfc19dd5 | 332 | #ifdef ITSMEASUREMENT |
0a173978 | 333 | // get multiplicity from ITS tracklets |
334 | for (Int_t i=0; i<mult->GetNumberOfTracklets(); ++i) | |
335 | { | |
336 | //printf("%d %f %f %f\n", i, mult->GetTheta(i), mult->GetPhi(i), mult->GetDeltaPhi(i)); | |
337 | ||
338 | // this removes non-tracklets. Very bad solution. SPD guys are working on better solution... | |
339 | if (mult->GetDeltaPhi(i) < -1000) | |
340 | continue; | |
341 | ||
447c325d | 342 | // systematic study: 10% lower efficiency |
343 | if (fSystSkipParticles && gRandom->Uniform() < 0.1) | |
344 | continue; | |
345 | ||
0a173978 | 346 | Float_t theta = mult->GetTheta(i); |
347 | Float_t eta = -TMath::Log(TMath::Tan(theta/2.)); | |
348 | ||
349 | if (TMath::Abs(eta) < 0.5) | |
350 | nESDTracks05++; | |
351 | ||
352 | if (TMath::Abs(eta) < 1.0) | |
353 | nESDTracks10++; | |
354 | ||
355 | if (TMath::Abs(eta) < 1.5) | |
356 | nESDTracks15++; | |
357 | ||
358 | if (TMath::Abs(eta) < 2.0) | |
359 | nESDTracks20++; | |
447c325d | 360 | |
361 | // TODO define needed, because this only works with new AliRoot | |
362 | Int_t label = mult->GetLabel(i); | |
363 | if (label < 0) | |
364 | continue; | |
365 | ||
366 | TParticle* mother = AliPWG0depHelper::FindPrimaryMother(stack, label); | |
367 | ||
368 | if (!mother) | |
369 | continue; | |
370 | ||
371 | Int_t id = -1; | |
372 | switch (TMath::Abs(mother->GetPdgCode())) | |
373 | { | |
374 | case 211: id = 0; break; | |
375 | case 321: id = 1; break; | |
376 | case 2212: id = 2; break; | |
377 | default: id = 3; break; | |
378 | } | |
379 | if (TMath::Abs(eta) < 2.0) | |
380 | nESDTracksSpecies[id]++; | |
381 | if (fParticleCorrection[id]) | |
382 | fParticleCorrection[id]->GetTrackCorrection()->FillMeas(vtxMC[2], mother->Eta(), mother->Pt()); | |
0a173978 | 383 | } |
cfc19dd5 | 384 | #endif |
0a173978 | 385 | |
cfc19dd5 | 386 | #ifdef TPCMEASUREMENT |
0a173978 | 387 | // get multiplicity from ESD tracks |
cfc19dd5 | 388 | TObjArray* list = fEsdTrackCuts->GetAcceptedTracks(fESD); |
0a173978 | 389 | Int_t nGoodTracks = list->GetEntries(); |
390 | // loop over esd tracks | |
391 | for (Int_t i=0; i<nGoodTracks; i++) | |
392 | { | |
393 | AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (list->At(i)); | |
394 | if (!esdTrack) | |
395 | { | |
396 | AliDebug(AliLog::kError, Form("ERROR: Could not retrieve track %d.", i)); | |
397 | continue; | |
398 | } | |
399 | ||
400 | Double_t p[3]; | |
401 | esdTrack->GetConstrainedPxPyPz(p); // ### TODO should be okay because we have a vertex, however GetInnerPxPyPy / GetOuterPxPyPy also exist | |
402 | TVector3 vector(p); | |
403 | ||
404 | Float_t theta = vector.Theta(); | |
405 | Float_t eta = -TMath::Log(TMath::Tan(theta/2.)); | |
406 | Float_t pt = vector.Pt(); | |
407 | ||
cfc19dd5 | 408 | //if (pt < kPtCut) |
409 | // continue; | |
0a173978 | 410 | |
411 | if (TMath::Abs(eta) < 0.5) | |
412 | nESDTracks05++; | |
43a9a462 | 413 | |
0a173978 | 414 | if (TMath::Abs(eta) < 1.0) |
415 | nESDTracks10++; | |
416 | ||
417 | if (TMath::Abs(eta) < 1.5) | |
418 | nESDTracks15++; | |
419 | ||
420 | if (TMath::Abs(eta) < 2.0) | |
421 | nESDTracks20++; | |
447c325d | 422 | |
423 | Int_t label = esdTrack->GetLabel(); | |
424 | if (label < 0) | |
425 | continue; | |
426 | ||
427 | TParticle* mother = AliPWG0depHelper::FindPrimaryMother(stack, label); | |
428 | ||
429 | if (!mother) | |
430 | continue; | |
431 | ||
432 | Int_t id = -1; | |
433 | switch (TMath::Abs(mother->GetPdgCode())) | |
434 | { | |
435 | case 211: id = 0; break; | |
436 | case 321: id = 1; break; | |
437 | case 2212: id = 2; break; | |
438 | default: id = 3; break; | |
439 | } | |
440 | if (TMath::Abs(eta) < 2.0) | |
441 | nESDTracksSpecies[id]++; | |
442 | if (fParticleCorrection[id]) | |
443 | fParticleCorrection[id]->GetTrackCorrection()->FillMeas(vtxMC[2], mother->Eta(), mother->Pt()); | |
cfc19dd5 | 444 | } |
445 | #endif | |
0a173978 | 446 | |
447c325d | 447 | if (nMCTracks20 == 0 && nESDTracks20 > 3) |
448 | printf("WARNING: Event %lld has %d generated and %d reconstructed...\n", entry, nMCTracks05, nESDTracks05); | |
449 | ||
dd701109 | 450 | fMultiplicity->FillMeasured(vtx[2], nESDTracks05, nESDTracks10, nESDTracks15, nESDTracks20); |
0a173978 | 451 | |
452 | // TODO should this be vtx[2] or vtxMC[2] ? | |
453 | fMultiplicity->FillCorrection(vtxMC[2], nMCTracks05, nMCTracks10, nMCTracks15, nMCTracks20, nMCTracksAll, nESDTracks05, nESDTracks10, nESDTracks15, nESDTracks20); | |
43a9a462 | 454 | |
447c325d | 455 | if (fParticleSpecies) |
456 | fParticleSpecies->Fill(nMCTracksSpecies[0], nMCTracksSpecies[1], nMCTracksSpecies[2], nMCTracksSpecies[3], nESDTracksSpecies[0], nESDTracksSpecies[1], nESDTracksSpecies[2], nESDTracksSpecies[3]); | |
457 | ||
43a9a462 | 458 | return kTRUE; |
459 | } | |
460 | ||
461 | void AliMultiplicityMCSelector::SlaveTerminate() | |
462 | { | |
463 | // The SlaveTerminate() function is called after all entries or objects | |
464 | // have been processed. When running with PROOF SlaveTerminate() is called | |
465 | // on each slave server. | |
466 | ||
467 | AliSelector::SlaveTerminate(); | |
468 | ||
469 | // Add the histograms to the output on each slave server | |
470 | if (!fOutput) | |
471 | { | |
472 | AliDebug(AliLog::kError, Form("ERROR: Output list not initialized.")); | |
473 | return; | |
474 | } | |
475 | ||
0a173978 | 476 | fOutput->Add(fMultiplicity); |
447c325d | 477 | for (Int_t i = 0; i < 4; ++i) |
478 | fOutput->Add(fParticleCorrection[i]); | |
479 | ||
480 | fOutput->Add(fParticleSpecies); | |
43a9a462 | 481 | } |
482 | ||
483 | void AliMultiplicityMCSelector::Terminate() | |
484 | { | |
485 | // The Terminate() function is the last function to be called during | |
486 | // a query. It always runs on the client, it can be used to present | |
487 | // the results graphically or save the results to file. | |
488 | ||
489 | AliSelector::Terminate(); | |
490 | ||
0a173978 | 491 | fMultiplicity = dynamic_cast<AliMultiplicityCorrection*> (fOutput->FindObject("Multiplicity")); |
447c325d | 492 | for (Int_t i = 0; i < 4; ++i) |
493 | fParticleCorrection[i] = dynamic_cast<AliCorrection*> (fOutput->FindObject(Form("correction_%d", i))); | |
494 | fParticleSpecies = dynamic_cast<TNtuple*> (fOutput->FindObject("fParticleSpecies")); | |
43a9a462 | 495 | |
0a173978 | 496 | if (!fMultiplicity) |
43a9a462 | 497 | { |
0a173978 | 498 | AliDebug(AliLog::kError, Form("ERROR: Histograms not available %p", (void*) fMultiplicity)); |
43a9a462 | 499 | return; |
500 | } | |
501 | ||
f31d5d49 | 502 | TFile* file = TFile::Open("multiplicityMC.root", "RECREATE"); |
43a9a462 | 503 | |
0a173978 | 504 | fMultiplicity->SaveHistograms(); |
447c325d | 505 | for (Int_t i = 0; i < 4; ++i) |
506 | if (fParticleCorrection[i]) | |
507 | fParticleCorrection[i]->SaveHistograms(); | |
508 | fParticleSpecies->Write(); | |
43a9a462 | 509 | |
510 | file->Close(); | |
0a173978 | 511 | |
512 | fMultiplicity->DrawHistograms(); | |
43a9a462 | 513 | } |