1 /**************************************************************************
2 * Copyright(c) 1998-2008, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
16 //*****************************************************
17 // Class AliEPSelectionTask
18 // Class to determine event plane
19 // author: Alberica Toia, Johanna Gramling
20 //*****************************************************
22 #include "AliEPSelectionTask.h"
30 #include <TObjString.h>
34 #include <TDirectory.h>
40 #include "AliAnalysisManager.h"
41 #include "AliVEvent.h"
43 #include "AliESDEvent.h"
44 #include "AliMCEvent.h"
45 #include "AliESDtrack.h"
46 #include "AliESDtrackCuts.h"
47 #include "AliESDHeader.h"
48 #include "AliESDInputHandler.h"
49 #include "AliAODHandler.h"
50 #include "AliAODEvent.h"
51 #include "AliHeader.h"
52 #include "AliGenHijingEventHeader.h"
53 #include "AliAnalysisTaskSE.h"
54 #include "AliPhysicsSelectionTask.h"
55 #include "AliPhysicsSelection.h"
56 #include "AliBackgroundSelection.h"
57 #include "AliESDUtils.h"
58 #include "AliOADBContainer.h"
59 #include "AliAODMCHeader.h"
60 #include "AliAODTrack.h"
61 #include "AliVTrack.h"
62 #include "AliEventplane.h"
64 ClassImp(AliEPSelectionTask)
66 //________________________________________________________________________
67 AliEPSelectionTask::AliEPSelectionTask():
69 fAnalysisInput("ESD"),
72 fUsePhiWeight(kFALSE),
74 fSaveTrackContribution(kFALSE),
101 // Default constructor
102 AliInfo("Event Plane Selection enabled.");
105 //________________________________________________________________________
106 AliEPSelectionTask::AliEPSelectionTask(const char *name):
107 AliAnalysisTaskSE(name),
108 fAnalysisInput("ESD"),
111 fUsePhiWeight(kFALSE),
112 fUsePtWeight(kFALSE),
113 fSaveTrackContribution(kFALSE),
114 fUserphidist(kFALSE),
140 // Default constructor
141 AliInfo("Event Plane Selection enabled.");
142 DefineOutput(1, TList::Class());
145 //________________________________________________________________________
146 AliEPSelectionTask::~AliEPSelectionTask()
149 if (fOutputList && !AliAnalysisManager::GetAnalysisManager()->IsProofMode()){
154 delete fESDtrackCuts;
169 //________________________________________________________________________
170 void AliEPSelectionTask::UserCreateOutputObjects()
172 // Create the output containers
173 if (fDebug>1) printf("AliEPSelectionTask::UserCreateOutputObjects() \n");
174 AliLog::SetClassDebugLevel("AliEPSelectionTask", AliLog::kInfo);
176 fOutputList = new TList();
177 fOutputList->SetOwner();
178 fHOutEventplaneQ = new TH1F("fHOutEventplaneQ","fHOutEventplaneQ; Event Plane Q",100,0,TMath::Pi());
179 fHOutPhi = new TH1F("fHOutPhi","fHOutPhi; Phi Distribution",100,0,TMath::TwoPi());
180 fHOutPhiCorr = new TH1F("fHOutPhiCorr","fHOutPhiCorr; Corrected Phi Distribution",100,0,TMath::TwoPi());
181 fHOutsub1sub2 = new TH2F("fHOutsub1sub2","fHOutsub1sub2; EP1; EP2",100,0,TMath::Pi(),100,0,TMath::Pi());
182 fHOutNTEPRes = new TH2F("fHOutNTEPRes","fHOutNTEPRes; Number of Tracks; Event Plane Resolution",100,0,5000,100,-TMath::Pi(),TMath::Pi());
183 fHOutPTPsi = new TH2F("fHOutPTPsi","fHOutPTPsi; PT; Phi-EP",100,0,20,100,0,TMath::Pi());
184 fHOutDiff = new TH2F("fHOutDiff","fHOutDiff; EP; MCEP",100,0,TMath::Pi(),100,0,TMath::Pi());
185 fHOutleadPTPsi = new TH2F("fHOutleadPTPsi","fHOutleadPTPsi; leadPT; EP",100,0,TMath::Pi(),100,0,TMath::Pi());
187 fOutputList->Add(fHOutEventplaneQ);
188 fOutputList->Add(fHOutPhi);
189 fOutputList->Add(fHOutPhiCorr);
190 fOutputList->Add(fHOutsub1sub2);
191 fOutputList->Add(fHOutNTEPRes);
192 fOutputList->Add(fHOutPTPsi);
193 fOutputList->Add(fHOutleadPTPsi);
194 fOutputList->Add(fHOutDiff);
196 PostData(1, fOutputList);
198 if(!fUserphidist) { // if it's already set and custom class is required, we use the one provided by the user
201 TString oadbfilename;
203 if (fAnalysisInput.CompareTo("AOD")==0){
204 oadbfilename = (Form("%s/COMMON/EVENTPLANE/data/epphidist.aod.root", AliAnalysisManager::GetOADBPath()));
205 } else if (fAnalysisInput.CompareTo("ESD")==0){
206 oadbfilename = (Form("%s/COMMON/EVENTPLANE/data/epphidist.root", AliAnalysisManager::GetOADBPath()));
209 TFile foadb(oadbfilename);
210 if(!foadb.IsOpen()) AliFatal(Form("Cannot open OADB file %s", oadbfilename.Data()));
212 AliInfo("Using Standard OADB");
213 fEPContainer = (AliOADBContainer*) foadb.Get("epphidist");
214 if (!fEPContainer) AliFatal("Cannot fetch OADB container for EP selection");
220 //________________________________________________________________________
221 void AliEPSelectionTask::UserExec(Option_t */*option*/)
223 // Execute analysis for current event:
224 if (fDebug>1) printf(" **** AliEPSelectionTask::UserExec() \n");
228 AliEventplane *esdEP;
231 Double_t fRP = 0.; // the monte carlo reaction plane angle
233 if (fAnalysisInput.CompareTo("ESD")==0){
235 AliVEvent* event = InputEvent();
236 AliESDEvent* esd = dynamic_cast<AliESDEvent*>(event);
238 if (!(fRunNumber == esd->GetRunNumber())) {
239 fRunNumber = esd->GetRunNumber();
245 AliMCEvent* mcEvent = MCEvent();
246 if (mcEvent && mcEvent->GenEventHeader()) {
247 AliGenHijingEventHeader* headerH = dynamic_cast<AliGenHijingEventHeader*>(mcEvent->GenEventHeader());
248 if (headerH) fRP = headerH->ReactionPlaneAngle();
252 esdEP = esd->GetEventplane();
253 if (fSaveTrackContribution) {
254 esdEP->GetQContributionXArray()->Set(esd->GetNumberOfTracks());
255 esdEP->GetQContributionYArray()->Set(esd->GetNumberOfTracks());
256 esdEP->GetQContributionXArraysub1()->Set(esd->GetNumberOfTracks());
257 esdEP->GetQContributionYArraysub1()->Set(esd->GetNumberOfTracks());
258 esdEP->GetQContributionXArraysub2()->Set(esd->GetNumberOfTracks());
259 esdEP->GetQContributionYArraysub2()->Set(esd->GetNumberOfTracks());
262 TObjArray* tracklist = new TObjArray;
263 if (fTrackType.CompareTo("GLOBAL")==0) tracklist = fESDtrackCuts->GetAcceptedTracks(esd,kFALSE);
264 if (fTrackType.CompareTo("TPC")==0) tracklist = fESDtrackCuts->GetAcceptedTracks(esd,kTRUE);
265 const int nt = tracklist->GetEntries();
268 fQVector = new TVector2(GetQ(esdEP,tracklist));
269 fEventplaneQ = fQVector->Phi()/2;
270 GetQsub(qq1, qq2, tracklist, esdEP);
271 fQsub1 = new TVector2(qq1);
272 fQsub2 = new TVector2(qq2);
273 fQsubRes = (fQsub1->Phi()/2 - fQsub2->Phi()/2);
275 esdEP->SetQVector(fQVector);
276 esdEP->SetEventplaneQ(fEventplaneQ);
277 esdEP->SetQsub(fQsub1,fQsub2);
278 esdEP->SetQsubRes(fQsubRes);
280 fHOutEventplaneQ->Fill(fEventplaneQ);
281 fHOutsub1sub2->Fill(fQsub1->Phi()/2,fQsub2->Phi()/2);
282 fHOutNTEPRes->Fill(nt,fQsubRes);
284 if (fUseMCRP) fHOutDiff->Fill(fEventplaneQ, fRP);
286 for (int iter = 0; iter<nt;iter++){
287 AliESDtrack* track = dynamic_cast<AliESDtrack*> (tracklist->At(iter));
289 float delta = track->Phi()-fEventplaneQ;
290 while (delta < 0) delta += TMath::Pi();
291 while (delta > TMath::Pi()) delta -= TMath::Pi();
292 fHOutPTPsi->Fill(track->Pt(),delta);
293 fHOutPhi->Fill(track->Phi());
294 fHOutPhiCorr->Fill(track->Phi(),GetPhiWeight(track));
298 AliESDtrack* trmax = esd->GetTrack(0);
299 for (int iter = 1; iter<nt;iter++){
300 AliESDtrack* track = dynamic_cast<AliESDtrack*> (tracklist->At(iter));
301 if (track && (track->Pt() > trmax->Pt())) trmax = track;
303 fHOutleadPTPsi->Fill(trmax->Phi(),fEventplaneQ);
310 else if (fAnalysisInput.CompareTo("AOD")==0){
311 AliVEvent* event = InputEvent();
312 AliAODEvent* aod = dynamic_cast<AliAODEvent*>(event);
315 if (!(fRunNumber == aod->GetRunNumber())) {
316 fRunNumber = aod->GetRunNumber();
321 AliAODMCHeader *headerH = dynamic_cast<AliAODMCHeader*>(aod->GetList()->FindObject(AliAODMCHeader::StdBranchName()));
322 if (headerH) fRP = headerH->GetReactionPlaneAngle();
325 esdEP = aod->GetHeader()->GetEventplaneP();
329 TObjArray* tracklist = GetAODTracksAndMaxID(aod,maxID);
331 if (fSaveTrackContribution) {
332 esdEP->GetQContributionXArray()->Set(maxID+1);
333 esdEP->GetQContributionYArray()->Set(maxID+1);
334 esdEP->GetQContributionXArraysub1()->Set(maxID+1);
335 esdEP->GetQContributionYArraysub1()->Set(maxID+1);
336 esdEP->GetQContributionXArraysub2()->Set(maxID+1);
337 esdEP->GetQContributionYArraysub2()->Set(maxID+1);
340 const int NT = tracklist->GetEntries();
343 fQVector = new TVector2(GetQ(esdEP,tracklist));
344 fEventplaneQ = fQVector->Phi()/2.;
345 GetQsub(qq1, qq2, tracklist, esdEP);
346 fQsub1 = new TVector2(qq1);
347 fQsub2 = new TVector2(qq2);
348 fQsubRes = (fQsub1->Phi()/2. - fQsub2->Phi()/2.);
350 esdEP->SetQVector(fQVector);
351 esdEP->SetEventplaneQ(fEventplaneQ);
352 esdEP->SetQsub(fQsub1,fQsub2);
353 esdEP->SetQsubRes(fQsubRes);
355 fHOutEventplaneQ->Fill(fEventplaneQ);
356 fHOutsub1sub2->Fill(fQsub1->Phi()/2.,fQsub2->Phi()/2.);
357 fHOutNTEPRes->Fill(NT,fQsubRes);
359 if (fUseMCRP) fHOutDiff->Fill(fEventplaneQ, fRP);
361 for (int iter = 0; iter<NT;iter++){
362 AliAODTrack* track = dynamic_cast<AliAODTrack*> (tracklist->At(iter));
364 float delta = track->Phi()-fEventplaneQ;
365 while (delta < 0) delta += TMath::Pi();
366 while (delta > TMath::Pi()) delta -= TMath::Pi();
367 fHOutPTPsi->Fill(track->Pt(),delta);
368 fHOutPhi->Fill(track->Phi());
369 fHOutPhiCorr->Fill(track->Phi(),GetPhiWeight(track));
373 AliAODTrack* trmax = aod->GetTrack(0);
374 for (int iter = 1; iter<NT;iter++){
375 AliAODTrack* track = dynamic_cast<AliAODTrack*> (tracklist->At(iter));
376 if (track && (track->Pt() > trmax->Pt())) trmax = track;
378 fHOutleadPTPsi->Fill(trmax->Phi(),fEventplaneQ);
389 printf(" Analysis Input not known!\n\n ");
392 PostData(1, fOutputList);
395 //________________________________________________________________________
396 void AliEPSelectionTask::Terminate(Option_t */*option*/)
398 // Terminate analysis
401 //__________________________________________________________________________
402 TVector2 AliEPSelectionTask::GetQ(AliEventplane* EP, TObjArray* tracklist)
411 int nt = tracklist->GetEntries();
413 for (int i=0; i<nt; i++){
415 track = dynamic_cast<AliVTrack*> (tracklist->At(i));
417 weight = GetWeight(track);
418 if (fSaveTrackContribution){
419 idtemp = track->GetID();
420 if ((fAnalysisInput.CompareTo("AOD")==0) && (fAODfilterbit == 128)) idtemp = idtemp*(-1) - 1;
421 EP->GetQContributionXArray()->AddAt(weight*cos(2*track->Phi()),idtemp);
422 EP->GetQContributionYArray()->AddAt(weight*sin(2*track->Phi()),idtemp);
424 mQx += (weight*cos(2*track->Phi()));
425 mQy += (weight*sin(2*track->Phi()));
432 //________________________________________________________________________
433 void AliEPSelectionTask::GetQsub(TVector2 &Q1, TVector2 &Q2, TObjArray* tracklist,AliEventplane* EP)
437 float mQx1=0, mQy1=0, mQx2=0, mQy2=0;
443 int nt = tracklist->GetEntries();
444 int trackcounter1=0, trackcounter2=0;
447 if (fSplitMethod == AliEPSelectionTask::kRandom){
449 for (Int_t i = 0; i < nt; i++) {
451 track = dynamic_cast<AliVTrack*> (tracklist->At(i));
452 if (!track) continue;
453 weight = GetWeight(track);
454 idtemp = track->GetID();
455 if ((fAnalysisInput.CompareTo("AOD")==0) && (fAODfilterbit == 128)) idtemp = idtemp*(-1) - 1;
457 // This loop splits the track set into 2 random subsets
458 if( trackcounter1 < int(nt/2.) && trackcounter2 < int(nt/2.)){
459 float random = rn.Rndm();
461 mQx1 += (weight*cos(2*track->Phi()));
462 mQy1 += (weight*sin(2*track->Phi()));
463 if (fSaveTrackContribution){
464 EP->GetQContributionXArraysub1()->AddAt(weight*cos(2*track->Phi()),idtemp);
465 EP->GetQContributionYArraysub1()->AddAt(weight*sin(2*track->Phi()),idtemp);
470 mQx2 += (weight*cos(2*track->Phi()));
471 mQy2 += (weight*sin(2*track->Phi()));
472 if (fSaveTrackContribution){
473 EP->GetQContributionXArraysub2()->AddAt(weight*cos(2*track->Phi()),idtemp);
474 EP->GetQContributionYArraysub2()->AddAt(weight*sin(2*track->Phi()),idtemp);
479 else if( trackcounter1 >= int(nt/2.)){
480 mQx2 += (weight*cos(2*track->Phi()));
481 mQy2 += (weight*sin(2*track->Phi()));
482 if (fSaveTrackContribution){
483 EP->GetQContributionXArraysub2()->AddAt(weight*cos(2*track->Phi()),idtemp);
484 EP->GetQContributionYArraysub2()->AddAt(weight*sin(2*track->Phi()),idtemp);
489 mQx1 += (weight*cos(2*track->Phi()));
490 mQy1 += (weight*sin(2*track->Phi()));
491 if (fSaveTrackContribution){
492 EP->GetQContributionXArraysub1()->AddAt(weight*cos(2*track->Phi()),idtemp);
493 EP->GetQContributionYArraysub1()->AddAt(weight*sin(2*track->Phi()),idtemp);
498 } else if (fSplitMethod == AliEPSelectionTask::kEta) {
500 for (Int_t i = 0; i < nt; i++) {
502 track = dynamic_cast<AliVTrack*> (tracklist->At(i));
503 if (!track) continue;
504 weight = GetWeight(track);
505 Double_t eta = track->Eta();
506 idtemp = track->GetID();
507 if ((fAnalysisInput.CompareTo("AOD")==0) && (fAODfilterbit == 128)) idtemp = idtemp*(-1) - 1;
509 if (eta > fEtaGap/2.) {
510 mQx1 += (weight*cos(2*track->Phi()));
511 mQy1 += (weight*sin(2*track->Phi()));
512 if (fSaveTrackContribution){
513 EP->GetQContributionXArraysub1()->AddAt(weight*cos(2*track->Phi()),idtemp);
514 EP->GetQContributionYArraysub1()->AddAt(weight*sin(2*track->Phi()),idtemp);
516 } else if (eta < -1.*fEtaGap/2.) {
517 mQx2 += (weight*cos(2*track->Phi()));
518 mQy2 += (weight*sin(2*track->Phi()));
519 if (fSaveTrackContribution){
520 EP->GetQContributionXArraysub2()->AddAt(weight*cos(2*track->Phi()),idtemp);
521 EP->GetQContributionYArraysub2()->AddAt(weight*sin(2*track->Phi()),idtemp);
526 printf("plane resolution determination method not available!\n\n ");
530 mQ[0].Set(mQx1,mQy1);
531 mQ[1].Set(mQx2,mQy2);
536 //________________________________________________________________________
537 void AliEPSelectionTask::SetPersonalESDtrackCuts(AliESDtrackCuts* trackcuts){
540 delete fESDtrackCuts;
543 if (fAnalysisInput.CompareTo("AOD")==0){
544 AliInfo("ESD track cuts not possible for AOD analysis; please use SetPersonalAODtrackCuts(); using TPC only track cuts");
550 fESDtrackCuts = trackcuts;
553 //________________________________________________________________________
554 void AliEPSelectionTask::SetPersonalAODtrackCuts(UInt_t filterbit, Float_t etalow, Float_t etaup, Float_t ptlow, Float_t ptup){
557 delete fESDtrackCuts;
560 if (fAnalysisInput.CompareTo("ESD")==0){
561 AliInfo("AOD track cuts not possible for ESD analysis; please use SetPersonalESDtrackCuts(); using TPC only track cuts");
567 fESDtrackCuts = new AliESDtrackCuts();
568 fESDtrackCuts->SetPtRange(ptlow,ptup);
569 fESDtrackCuts->SetEtaRange(etalow,etaup);
570 fAODfilterbit = filterbit;
573 //_____________________________________________________________________________
575 void AliEPSelectionTask::SetTrackType(TString tracktype){
576 fTrackType = tracktype;
578 if (fTrackType.CompareTo("GLOBAL")==0){
579 fESDtrackCuts = AliESDtrackCuts::GetStandardITSTPCTrackCuts2010(kTRUE);
582 if (fTrackType.CompareTo("TPC")==0){
583 fESDtrackCuts = AliESDtrackCuts::GetStandardTPCOnlyTrackCuts();
586 fESDtrackCuts->SetPtRange(0.15,20.);
587 fESDtrackCuts->SetEtaRange(-0.8,0.8);
591 //________________________________________________________________________
592 Double_t AliEPSelectionTask::GetWeight(TObject* track1)
595 AliVTrack* track = dynamic_cast<AliVTrack*>(track1);
596 if (fUsePtWeight && track) {
597 if (track->Pt()<2) ptweight=track->Pt();
600 return ptweight*GetPhiWeight(track);
603 //________________________________________________________________________
604 Double_t AliEPSelectionTask::GetPhiWeight(TObject* track1)
606 Double_t phiweight=1;
607 AliVTrack* track = dynamic_cast<AliVTrack*>(track1);
609 if (fUsePhiWeight && fPhiDist && track) {
610 Double_t nParticles = fPhiDist->Integral();
611 Double_t nPhibins = fPhiDist->GetNbinsX();
613 Double_t Phi = track->Phi();
615 while (Phi<0) Phi += TMath::TwoPi();
616 while (Phi>TMath::TwoPi()) Phi -= TMath::TwoPi();
618 Double_t PhiDistValue = fPhiDist->GetBinContent(1+TMath::FloorNint((track->Phi())*nPhibins/TMath::TwoPi()));
620 if (PhiDistValue > 0) phiweight = nParticles/nPhibins/PhiDistValue;
625 //__________________________________________________________________________
626 void AliEPSelectionTask::SetPhiDist()
628 if(!fUserphidist) { // if it's already set and custom class is required, we use the one provided by the user
630 fPhiDist = (TH1F*) fEPContainer->GetObject(fRunNumber, "Default");
631 if (!fPhiDist) AliFatal(Form("Cannot find OADB phi distribution for run %d", fRunNumber));
635 AliInfo("Using Custom Phi Distribution");
644 for (int i=1; i<fPhiDist->GetNbinsX(); i++){
645 if (!((fPhiDist->GetBinContent(i))>0)) {
650 cout << "empty bins - rebinning!" << endl;
658 AliError("After Maximum of rebinning still empty Phi-bins!!!");
662 //__________________________________________________________________________
663 void AliEPSelectionTask::SetPersonalPhiDistribution(const char* infilename, char* listname)
666 fUserphidist = kTRUE;
669 TObject* list = f.Get(listname);
670 fPhiDist = (TH1F*)list->FindObject("fHOutPhi");
671 if (!fPhiDist) AliFatal("Phi Distribution not found!!!");
677 //_________________________________________________________________________
678 TObjArray* AliEPSelectionTask::GetAODTracksAndMaxID(AliAODEvent* aod, Int_t& maxid)
680 TObjArray *acctracks = new TObjArray();
684 Int_t maxidtemp = -1;
689 fESDtrackCuts->GetPtRange(ptlow,ptup);
690 fESDtrackCuts->GetEtaRange(etalow,etaup);
692 for (Int_t i = 0; i < aod->GetNumberOfTracks() ; i++){
693 tr = aod->GetTrack(i);
694 maxidtemp = tr->GetID();
695 if(maxidtemp < 0 && fAODfilterbit != 128) continue;
696 if(maxidtemp > -1 && fAODfilterbit == 128) continue;
697 if (fAODfilterbit == 128) maxidtemp = maxidtemp*(-1) - 1;
698 if (maxidtemp > maxid1) maxid1 = maxidtemp;
699 if(tr->TestFilterBit(fAODfilterbit) && tr->Pt() < ptup && tr->Pt() > ptlow && tr->Eta() < etaup && tr->Eta() > etalow){