3 #include "AliMultiplicityTask.h"
14 #include <TParticle.h>
17 #include <TObjString.h>
21 #include <AliESDVertex.h>
22 #include <AliESDEvent.h>
24 #include <AliHeader.h>
25 #include <AliGenEventHeader.h>
26 #include <AliMultiplicity.h>
27 #include <AliAnalysisManager.h>
28 #include <AliMCEventHandler.h>
29 #include <AliMCEvent.h>
30 #include <AliESDInputHandler.h>
32 #include "AliESDtrackCuts.h"
33 #include "AliPWG0Helper.h"
34 #include "multiplicity/AliMultiplicityCorrection.h"
35 #include "AliCorrection.h"
36 #include "AliCorrectionMatrix3D.h"
37 #include "AliTriggerAnalysis.h"
39 ClassImp(AliMultiplicityTask)
41 AliMultiplicityTask::AliMultiplicityTask(const char* opt) :
42 AliAnalysisTask("AliMultiplicityTask", ""),
45 fAnalysisMode((AliPWG0Helper::AnalysisMode) (AliPWG0Helper::kSPD | AliPWG0Helper::kFieldOn)),
46 fTrigger(AliTriggerAnalysis::kMB1),
52 fSystSkipParticles(kFALSE),
53 fSelectProcessType(0),
60 // Constructor. Initialization of pointers
63 for (Int_t i = 0; i<8; i++)
64 fParticleCorrection[i] = 0;
66 // Define input and output slots here
67 DefineInput(0, TChain::Class());
68 DefineOutput(0, TList::Class());
71 AliMultiplicityTask::~AliMultiplicityTask()
77 // histograms are in the output list and deleted when the output
78 // list is deleted by the TSelector dtor
86 //________________________________________________________________________
87 void AliMultiplicityTask::ConnectInputData(Option_t *)
92 Printf("AliMultiplicityTask::ConnectInputData called");
94 TTree* tree = dynamic_cast<TTree*> (GetInputData(0));
96 Printf("ERROR: Could not read tree from input slot 0");
98 // Disable all branches and enable only the needed ones
100 tree->SetBranchStatus("*", 0);
102 tree->SetBranchStatus("AliESDHeader*", 1);
103 tree->SetBranchStatus("*Vertex*", 1);
105 if (fAnalysisMode & AliPWG0Helper::kSPD) {
106 tree->SetBranchStatus("AliMultiplicity*", 1);
109 if (fAnalysisMode & AliPWG0Helper::kTPC || fAnalysisMode & AliPWG0Helper::kTPCITS) {
110 //AliESDtrackCuts::EnableNeededBranches(tree);
111 tree->SetBranchStatus("Tracks*", 1);
115 AliESDInputHandler *esdH = dynamic_cast<AliESDInputHandler*> (AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler());
118 Printf("ERROR: Could not get ESDInputHandler");
120 fESD = esdH->GetEvent();
123 // disable info messages of AliMCEvent (per event)
124 AliLog::SetClassDebugLevel("AliMCEvent", AliLog::kWarning - AliLog::kDebug + 1);
127 void AliMultiplicityTask::CreateOutputObjects()
129 // create result objects and add to output list
134 fMultiplicity = new AliMultiplicityCorrection("Multiplicity", "Multiplicity");
135 fOutput->Add(fMultiplicity);
137 fdNdpT = new TH1F("fdNdpT", "fdNdpT", 1000, 0, 10);
139 fOutput->Add(fdNdpT);
141 if (fOption.Contains("skip-particles"))
143 fSystSkipParticles = kTRUE;
144 AliInfo("WARNING: Systematic study enabled. Particles will be skipped.");
147 if (fOption.Contains("particle-efficiency"))
148 for (Int_t i = 0; i<8; i++)
150 fParticleCorrection[i] = new AliCorrection(Form("correction_%d", i), Form("correction_%d", i));
151 fOutput->Add(fParticleCorrection[i]);
154 if (fOption.Contains("only-process-type-nd"))
155 fSelectProcessType = 1;
157 if (fOption.Contains("only-process-type-sd"))
158 fSelectProcessType = 2;
160 if (fOption.Contains("only-process-type-dd"))
161 fSelectProcessType = 3;
163 if (fSelectProcessType != 0)
164 AliInfo(Form("WARNING: Systematic study enabled. Only considering process type %d", fSelectProcessType));
166 if (fOption.Contains("pt-spectrum-hist"))
168 TFile* file = TFile::Open("ptspectrum_fit.root");
171 TString subStr(fOption(fOption.Index("pt-spectrum")+17, 3));
172 TString histName(Form("ptspectrum_%s", subStr.Data()));
173 AliInfo(Form("Pt-Spectrum modification. Using %s.", histName.Data()));
174 fPtSpectrum = (TH1D*) file->Get(histName);
176 AliError("Histogram not found");
179 AliError("Could not open ptspectrum_fit.root. Pt Spectrum study could not be enabled.");
182 if (fOption.Contains("pt-spectrum-func"))
186 Printf("Using function for systematic p_t study");
190 Printf("ERROR: Could not find function for systematic p_t study");
191 fPtSpectrum = new TH1D("fPtSpectrum", "fPtSpectrum", 1, 0, 100);
192 fPtSpectrum->SetBinContent(1, 1);
197 Printf("WARNING: Systematic study enabled. Pt spectrum will be modified");
199 if (fOption.Contains("particle-species")) {
200 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");
201 fOutput->Add(fParticleSpecies);
204 // TODO set seed for random generator
207 void AliMultiplicityTask::Exec(Option_t*)
211 // Check prerequisites
214 AliDebug(AliLog::kError, "ESD not available");
218 static AliTriggerAnalysis* triggerAnalysis = new AliTriggerAnalysis;
219 Bool_t eventTriggered = triggerAnalysis->IsTriggerFired(fESD, fTrigger);
220 //Printf("%lld", fESD->GetTriggerMask());
222 const AliESDVertex* vtxESD = AliPWG0Helper::GetVertex(fESD, fAnalysisMode);
223 Bool_t eventVertex = (vtxESD != 0);
229 // post the data already here
230 PostData(0, fOutput);
232 //const Float_t kPtCut = 0.3;
234 // create list of (label, eta) tuples
235 Int_t inputCount = 0;
238 if (fAnalysisMode & AliPWG0Helper::kSPD)
241 const AliMultiplicity* mult = fESD->GetMultiplicity();
244 AliDebug(AliLog::kError, "AliMultiplicity not available");
248 labelArr = new Int_t[mult->GetNumberOfTracklets()];
249 etaArr = new Float_t[mult->GetNumberOfTracklets()];
251 // get multiplicity from ITS tracklets
252 for (Int_t i=0; i<mult->GetNumberOfTracklets(); ++i)
254 //printf("%d %f %f %f\n", i, mult->GetTheta(i), mult->GetPhi(i), mult->GetDeltaPhi(i));
256 Float_t deltaPhi = mult->GetDeltaPhi(i);
258 if (fDeltaPhiCut > 0 && TMath::Abs(deltaPhi) > fDeltaPhiCut)
261 etaArr[inputCount] = mult->GetEta(i);
262 if (mult->GetLabel(i, 0) == mult->GetLabel(i, 1))
264 labelArr[inputCount] = mult->GetLabel(i, 0);
267 labelArr[inputCount] = -1;
272 else if (fAnalysisMode & AliPWG0Helper::kTPC || fAnalysisMode & AliPWG0Helper::kTPCITS)
276 AliDebug(AliLog::kError, "fESDTrackCuts not available");
282 // get multiplicity from ESD tracks
283 TObjArray* list = fEsdTrackCuts->GetAcceptedTracks(fESD, (fAnalysisMode & AliPWG0Helper::kTPC));
284 Int_t nGoodTracks = list->GetEntries();
286 labelArr = new Int_t[nGoodTracks];
287 etaArr = new Float_t[nGoodTracks];
289 // loop over esd tracks
290 for (Int_t i=0; i<nGoodTracks; i++)
292 AliESDtrack* esdTrack = dynamic_cast<AliESDtrack*> (list->At(i));
295 AliDebug(AliLog::kError, Form("ERROR: Could not retrieve track %d.", i));
299 etaArr[inputCount] = esdTrack->Eta();
300 labelArr[inputCount] = TMath::Abs(esdTrack->GetLabel());
308 // eta range for nMCTracksSpecies, nESDTracksSpecies
309 Float_t etaRange = 1.0;
310 // switch (fAnalysisMode) {
311 // case AliPWG0Helper::kInvalid: break;
312 // case AliPWG0Helper::kTPC:
313 // case AliPWG0Helper::kTPCITS:
314 // etaRange = 1.0; break;
315 // case AliPWG0Helper::kSPD: etaRange = 1.0; break;
319 if (!fReadMC) // Processing of ESD information
321 if (eventTriggered && eventVertex)
323 Int_t nESDTracks05 = 0;
324 Int_t nESDTracks10 = 0;
325 Int_t nESDTracks14 = 0;
327 for (Int_t i=0; i<inputCount; ++i)
329 Float_t eta = etaArr[i];
331 if (TMath::Abs(eta) < 0.5)
334 if (TMath::Abs(eta) < 1.0)
337 if (TMath::Abs(eta) < 1.4)
341 fMultiplicity->FillMeasured(vtx[2], nESDTracks05, nESDTracks10, nESDTracks14);
344 else if (fReadMC) // Processing of MC information
346 AliMCEventHandler* eventHandler = dynamic_cast<AliMCEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());
348 Printf("ERROR: Could not retrieve MC event handler");
352 AliMCEvent* mcEvent = eventHandler->MCEvent();
354 Printf("ERROR: Could not retrieve MC event");
358 AliStack* stack = mcEvent->Stack();
361 AliDebug(AliLog::kError, "Stack not available");
365 AliHeader* header = mcEvent->Header();
368 AliDebug(AliLog::kError, "Header not available");
374 Printf("WARNING: Replacing vertex by MC vertex. This is for systematical checks only.");
376 AliGenEventHeader* genHeader = header->GenEventHeader();
378 genHeader->PrimaryVertex(vtxMC);
383 // get process information
384 AliPWG0Helper::MCProcessType processType = AliPWG0Helper::GetEventProcessType(header);
386 Bool_t processEvent = kTRUE;
387 if (fSelectProcessType > 0)
389 processEvent = kFALSE;
392 if (fSelectProcessType == 1 && processType == AliPWG0Helper::kND)
393 processEvent = kTRUE;
395 // single diffractive
396 if (fSelectProcessType == 2 && processType == AliPWG0Helper::kSD)
397 processEvent = kTRUE;
399 // double diffractive
400 if (fSelectProcessType == 3 && processType == AliPWG0Helper::kDD)
401 processEvent = kTRUE;
404 Printf("Skipping this event, because it is not of the requested process type (%d)", (Int_t) processType);
410 AliGenEventHeader* genHeader = header->GenEventHeader();
412 genHeader->PrimaryVertex(vtxMC);
414 // get number of tracks from MC
415 // loop over mc particles
416 Int_t nPrim = stack->GetNprimary();
417 Int_t nMCPart = stack->GetNtrack();
419 // tracks in different eta ranges
420 Int_t nMCTracks05 = 0;
421 Int_t nMCTracks10 = 0;
422 Int_t nMCTracks14 = 0;
423 Int_t nMCTracksAll = 0;
425 // tracks per particle species, in |eta| < 2 (systematic study)
426 Int_t nMCTracksSpecies[4]; // (pi, K, p, other)
427 for (Int_t i = 0; i<4; ++i)
428 nMCTracksSpecies[i] = 0;
430 for (Int_t iMc = 0; iMc < nPrim; ++iMc)
432 AliDebug(AliLog::kDebug+1, Form("MC Loop: Processing particle %d.", iMc));
434 TParticle* particle = stack->Particle(iMc);
438 AliDebug(AliLog::kError, Form("UNEXPECTED: particle with label %d not found in stack (mc loop).", iMc));
442 Bool_t debug = kFALSE;
443 if (AliPWG0Helper::IsPrimaryCharged(particle, nPrim, debug) == kFALSE)
445 //printf("%d) DROPPED ", iMC);
450 //printf("%d) OK ", iMC);
453 //if (particle->Pt() < kPtCut)
456 Int_t particleWeight = 1;
458 Float_t pt = particle->Pt();
460 // in case of systematic study, weight according to the change of the pt spectrum
461 // it cannot be just multiplied because we cannot count "half of a particle"
462 // instead a random generator decides if the particle is counted twice (if value > 1)
463 // or not (if value < 0)
466 Int_t bin = fPtSpectrum->FindBin(pt);
467 if (bin > 0 && bin <= fPtSpectrum->GetNbinsX())
469 Float_t factor = fPtSpectrum->GetBinContent(bin);
472 Float_t random = gRandom->Uniform();
473 if (factor > 1 && random < factor - 1)
477 else if (factor < 1 && random < 1 - factor)
483 //Printf("MC weight is: %d", particleWeight);
485 if (TMath::Abs(particle->Eta()) < 0.5)
486 nMCTracks05 += particleWeight;
488 if (TMath::Abs(particle->Eta()) < 1.0)
489 nMCTracks10 += particleWeight;
491 if (TMath::Abs(particle->Eta()) < 1.4)
492 nMCTracks14 += particleWeight;
494 nMCTracksAll += particleWeight;
496 if (particle->Pt() > 0 && TMath::Abs(particle->Eta()) < 1.0)
497 fdNdpT->Fill(particle->Pt(), 1.0 / particle->Pt());
499 if (fParticleCorrection[0] || fParticleSpecies)
502 switch (TMath::Abs(particle->GetPdgCode()))
504 case 211: id = 0; break;
505 case 321: id = 1; break;
506 case 2212: id = 2; break;
507 default: id = 3; break;
510 if (TMath::Abs(particle->Eta()) < etaRange)
511 nMCTracksSpecies[id]++;
513 if (fParticleCorrection[id])
514 fParticleCorrection[id]->GetTrackCorrection()->FillGene(vtxMC[2], particle->Eta(), particle->Pt());
516 } // end of mc particle
518 fMultiplicity->FillGenerated(vtxMC[2], eventTriggered, eventVertex, processType, (Int_t) nMCTracks05, (Int_t) nMCTracks10, (Int_t) nMCTracks14, (Int_t) nMCTracksAll);
520 if (eventTriggered && eventVertex)
522 Int_t nESDTracks05 = 0;
523 Int_t nESDTracks10 = 0;
524 Int_t nESDTracks14 = 0;
526 // tracks per particle species, in |eta| < 2 (systematic study)
527 Int_t nESDTracksSpecies[7]; // (pi, K, p, other, nolabel, doublecount_prim, doublecount_all)
528 for (Int_t i = 0; i<7; ++i)
529 nESDTracksSpecies[i] = 0;
531 Bool_t* foundPrimaries = new Bool_t[nPrim]; // to prevent double counting
532 for (Int_t i=0; i<nPrim; i++)
533 foundPrimaries[i] = kFALSE;
535 Bool_t* foundPrimaries2 = new Bool_t[nPrim]; // to prevent double counting
536 for (Int_t i=0; i<nPrim; i++)
537 foundPrimaries2[i] = kFALSE;
539 Bool_t* foundTracks = new Bool_t[nMCPart]; // to prevent double counting
540 for (Int_t i=0; i<nMCPart; i++)
541 foundTracks[i] = kFALSE;
543 for (Int_t i=0; i<inputCount; ++i)
545 Float_t eta = etaArr[i];
546 Int_t label = labelArr[i];
548 Int_t particleWeight = 1;
550 // systematic study: 5% lower efficiency
551 if (fSystSkipParticles && (gRandom->Uniform() < 0.05))
554 // in case of systematic study, weight according to the change of the pt spectrum
557 TParticle* mother = 0;
559 // preserve label for later
560 Int_t labelCopy = label;
562 labelCopy = AliPWG0Helper::FindPrimaryMotherLabel(stack, labelCopy);
564 mother = stack->Particle(labelCopy);
566 // in case of pt study we do not count particles w/o label, because they cannot be scaled
570 // it cannot be just multiplied because we cannot count "half of a particle"
571 // instead a random generator decides if the particle is counted twice (if value > 1)
572 // or not (if value < 0)
573 Int_t bin = fPtSpectrum->FindBin(mother->Pt());
574 if (bin > 0 && bin <= fPtSpectrum->GetNbinsX())
576 Float_t factor = fPtSpectrum->GetBinContent(bin);
579 Float_t random = gRandom->Uniform();
580 if (factor > 1 && random < factor - 1)
584 else if (factor < 1 && random < 1 - factor)
590 //Printf("ESD weight is: %d", particleWeight);
592 if (TMath::Abs(eta) < 0.5)
593 nESDTracks05 += particleWeight;
595 if (TMath::Abs(eta) < 1.0)
596 nESDTracks10 += particleWeight;
598 if (TMath::Abs(eta) < 1.4)
599 nESDTracks14 += particleWeight;
601 if (fParticleSpecies)
603 Int_t motherLabel = -1;
604 TParticle* mother = 0;
608 motherLabel = AliPWG0Helper::FindPrimaryMotherLabel(stack, label);
609 if (motherLabel >= 0)
610 mother = stack->Particle(motherLabel);
614 // count tracks that did not have a label
615 if (TMath::Abs(eta) < etaRange)
616 nESDTracksSpecies[4]++;
620 // get particle type (pion, proton, kaon, other) of mother
622 switch (TMath::Abs(mother->GetPdgCode()))
624 case 211: idMother = 0; break;
625 case 321: idMother = 1; break;
626 case 2212: idMother = 2; break;
627 default: idMother = 3; break;
630 // double counting is ok for particle ratio study
631 if (TMath::Abs(eta) < etaRange)
632 nESDTracksSpecies[idMother]++;
634 // double counting is not ok for efficiency study
636 // 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)
637 if (foundTracks[label])
639 if (TMath::Abs(eta) < etaRange)
640 nESDTracksSpecies[6]++;
644 foundTracks[label] = kTRUE;
646 // particle (primary) already counted?
647 if (foundPrimaries[motherLabel])
649 if (TMath::Abs(eta) < etaRange)
650 nESDTracksSpecies[5]++;
653 foundPrimaries[motherLabel] = kTRUE;
658 if (fParticleCorrection[0])
660 if (label >= 0 && stack->IsPhysicalPrimary(label))
662 TParticle* particle = stack->Particle(label);
664 // get particle type (pion, proton, kaon, other)
666 switch (TMath::Abs(particle->GetPdgCode()))
668 case 211: id = 0; break;
669 case 321: id = 1; break;
670 case 2212: id = 2; break;
671 default: id = 3; break;
674 // todo check if values are not completely off??
676 // particle (primary) already counted?
677 if (!foundPrimaries2[label])
679 foundPrimaries2[label] = kTRUE;
680 fParticleCorrection[id]->GetTrackCorrection()->FillMeas(vtxMC[2], particle->Eta(), particle->Pt());
686 if (fParticleCorrection[0])
688 // if the particle decays/stops before this radius we do not see it
689 // 8cm larger than SPD layer 2
690 // 123cm TPC radius where a track has about 50 clusters (cut limit)
691 const Float_t endRadius = (fAnalysisMode & AliPWG0Helper::kSPD) ? 8. : 123;
693 // loop over all primaries that have not been found
694 for (Int_t i=0; i<nPrim; i++)
697 if (foundPrimaries2[i])
700 TParticle* particle = 0;
701 TClonesArray* trackrefs = 0;
702 mcEvent->GetParticleAndTR(i, particle, trackrefs);
704 // true primary and charged
705 if (!AliPWG0Helper::IsPrimaryCharged(particle, nPrim))
708 //skip particles with larger |eta| than 3, to keep the log clean, is anyway not included in correction map
709 if (TMath::Abs(particle->Eta()) > 3)
712 // skipping checking of process type of daughter: Neither kPBrem, kPDeltaRay nor kPCerenkov should appear in the event generation
714 // get particle type (pion, proton, kaon, other)
716 switch (TMath::Abs(particle->GetPdgCode()))
718 case 211: id = 4; break;
719 case 321: id = 5; break;
720 case 2212: id = 6; break;
721 default: id = 7; break;
724 if (!fParticleCorrection[id])
727 // get last track reference
728 AliTrackReference* trackref = dynamic_cast<AliTrackReference*> (trackrefs->Last());
732 Printf("ERROR: Could not get trackref of %d (count %d)", i, trackrefs->GetEntries());
737 // particle in tracking volume long enough...
738 if (trackref->R() > endRadius)
741 if (particle->GetLastDaughter() >= 0)
743 Int_t uID = stack->Particle(particle->GetLastDaughter())->GetUniqueID();
744 //if (uID != kPBrem && uID != kPDeltaRay && uID < kPCerenkov)
749 Printf("Particle %d (%s) decayed at %f, daugher uniqueID: %d:", i, particle->GetName(), trackref->R(), uID);
752 for (Int_t d = particle->GetFirstDaughter(); d <= particle->GetLastDaughter(); d++)
753 stack->Particle(d)->Print();
756 fParticleCorrection[id]->GetTrackCorrection()->FillGene(vtxMC[2], particle->Eta(), particle->Pt());
761 if (trackref->DetectorId() == -1)
764 Printf("Particle %d stopped at %f:", i, trackref->R());
768 fParticleCorrection[id]->GetTrackCorrection()->FillMeas(vtxMC[2], particle->Eta(), particle->Pt());
772 Printf("Particle %d simply not tracked", i);
778 delete[] foundTracks;
779 delete[] foundPrimaries;
780 delete[] foundPrimaries2;
782 if ((Int_t) nMCTracks14 > 10 && nESDTracks14 <= 3)
784 TTree* tree = dynamic_cast<TTree*> (GetInputData(0));
785 printf("WARNING: Event %lld %s (vtx-z = %f, recon: %f, contrib: %d, res: %f) has %d generated and %d reconstructed...\n", tree->GetReadEntry(), tree->GetCurrentFile()->GetName(), vtxMC[2], vtx[2], vtxESD->GetNContributors(), vtxESD->GetZRes(), nMCTracks14, nESDTracks14);
788 // fill response matrix using vtxMC (best guess)
789 fMultiplicity->FillCorrection(vtxMC[2], nMCTracks05, nMCTracks10, nMCTracks14, nMCTracksAll, nESDTracks05, nESDTracks10, nESDTracks14);
791 fMultiplicity->FillMeasured(vtx[2], nESDTracks05, nESDTracks10, nESDTracks14);
793 if (fParticleSpecies)
794 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]);
805 void AliMultiplicityTask::Terminate(Option_t *)
807 // The Terminate() function is the last function to be called during
808 // a query. It always runs on the client, it can be used to present
809 // the results graphically or save the results to file.
811 fOutput = dynamic_cast<TList*> (GetOutputData(0));
813 Printf("ERROR: fOutput not available");
817 fMultiplicity = dynamic_cast<AliMultiplicityCorrection*> (fOutput->FindObject("Multiplicity"));
818 for (Int_t i = 0; i < 8; ++i)
819 fParticleCorrection[i] = dynamic_cast<AliCorrection*> (fOutput->FindObject(Form("correction_%d", i)));
820 fParticleSpecies = dynamic_cast<TNtuple*> (fOutput->FindObject("fParticleSpecies"));
822 fdNdpT = dynamic_cast<TH1*> (fOutput->FindObject("fdNdpT"));
826 AliDebug(AliLog::kError, Form("ERROR: Histograms not available %p", (void*) fMultiplicity));
830 TFile* file = TFile::Open("multiplicity.root", "RECREATE");
832 fMultiplicity->SaveHistograms();
833 for (Int_t i = 0; i < 8; ++i)
834 if (fParticleCorrection[i])
835 fParticleCorrection[i]->SaveHistograms();
836 if (fParticleSpecies)
837 fParticleSpecies->Write();
841 TObjString option(fOption);
846 Printf("Written result to multiplicity.root");