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();
322 AliAODMCHeader *headerH = dynamic_cast<AliAODMCHeader*>(aod->GetList()->FindObject(AliAODMCHeader::StdBranchName()));
323 if (headerH) fRP = headerH->GetReactionPlaneAngle();
327 esdEP = aod->GetHeader()->GetEventplaneP();
331 TObjArray* tracklist = GetAODTracksAndMaxID(aod,maxID);
333 if (fSaveTrackContribution) {
334 esdEP->GetQContributionXArray()->Set(maxID+1);
335 esdEP->GetQContributionYArray()->Set(maxID+1);
336 esdEP->GetQContributionXArraysub1()->Set(maxID+1);
337 esdEP->GetQContributionYArraysub1()->Set(maxID+1);
338 esdEP->GetQContributionXArraysub2()->Set(maxID+1);
339 esdEP->GetQContributionYArraysub2()->Set(maxID+1);
342 const int NT = tracklist->GetEntries();
345 fQVector = new TVector2(GetQ(esdEP,tracklist));
346 fEventplaneQ = fQVector->Phi()/2.;
347 GetQsub(qq1, qq2, tracklist, esdEP);
348 fQsub1 = new TVector2(qq1);
349 fQsub2 = new TVector2(qq2);
350 fQsubRes = (fQsub1->Phi()/2. - fQsub2->Phi()/2.);
352 esdEP->SetQVector(fQVector);
353 esdEP->SetEventplaneQ(fEventplaneQ);
354 esdEP->SetQsub(fQsub1,fQsub2);
355 esdEP->SetQsubRes(fQsubRes);
357 fHOutEventplaneQ->Fill(fEventplaneQ);
358 fHOutsub1sub2->Fill(fQsub1->Phi()/2.,fQsub2->Phi()/2.);
359 fHOutNTEPRes->Fill(NT,fQsubRes);
361 if (fUseMCRP) fHOutDiff->Fill(fEventplaneQ, fRP);
363 for (int iter = 0; iter<NT;iter++){
364 AliAODTrack* track = dynamic_cast<AliAODTrack*> (tracklist->At(iter));
366 float delta = track->Phi()-fEventplaneQ;
367 while (delta < 0) delta += TMath::Pi();
368 while (delta > TMath::Pi()) delta -= TMath::Pi();
369 fHOutPTPsi->Fill(track->Pt(),delta);
370 fHOutPhi->Fill(track->Phi());
371 fHOutPhiCorr->Fill(track->Phi(),GetPhiWeight(track));
375 AliAODTrack* trmax = aod->GetTrack(0);
376 for (int iter = 1; iter<NT;iter++){
377 AliAODTrack* track = dynamic_cast<AliAODTrack*> (tracklist->At(iter));
378 if (track && (track->Pt() > trmax->Pt())) trmax = track;
380 fHOutleadPTPsi->Fill(trmax->Phi(),fEventplaneQ);
391 printf(" Analysis Input not known!\n\n ");
394 PostData(1, fOutputList);
397 //________________________________________________________________________
398 void AliEPSelectionTask::Terminate(Option_t */*option*/)
400 // Terminate analysis
403 //__________________________________________________________________________
404 TVector2 AliEPSelectionTask::GetQ(AliEventplane* EP, TObjArray* tracklist)
413 int nt = tracklist->GetEntries();
415 for (int i=0; i<nt; i++){
417 track = dynamic_cast<AliVTrack*> (tracklist->At(i));
419 weight = GetWeight(track);
420 if (fSaveTrackContribution){
421 idtemp = track->GetID();
422 if ((fAnalysisInput.CompareTo("AOD")==0) && (fAODfilterbit == 128)) idtemp = idtemp*(-1) - 1;
423 EP->GetQContributionXArray()->AddAt(weight*cos(2*track->Phi()),idtemp);
424 EP->GetQContributionYArray()->AddAt(weight*sin(2*track->Phi()),idtemp);
426 mQx += (weight*cos(2*track->Phi()));
427 mQy += (weight*sin(2*track->Phi()));
434 //________________________________________________________________________
435 void AliEPSelectionTask::GetQsub(TVector2 &Q1, TVector2 &Q2, TObjArray* tracklist,AliEventplane* EP)
439 float mQx1=0, mQy1=0, mQx2=0, mQy2=0;
445 int nt = tracklist->GetEntries();
446 int trackcounter1=0, trackcounter2=0;
449 if (fSplitMethod == AliEPSelectionTask::kRandom){
451 for (Int_t i = 0; i < nt; i++) {
453 track = dynamic_cast<AliVTrack*> (tracklist->At(i));
454 if (!track) continue;
455 weight = GetWeight(track);
456 idtemp = track->GetID();
457 if ((fAnalysisInput.CompareTo("AOD")==0) && (fAODfilterbit == 128)) idtemp = idtemp*(-1) - 1;
459 // This loop splits the track set into 2 random subsets
460 if( trackcounter1 < int(nt/2.) && trackcounter2 < int(nt/2.)){
461 float random = rn.Rndm();
463 mQx1 += (weight*cos(2*track->Phi()));
464 mQy1 += (weight*sin(2*track->Phi()));
465 if (fSaveTrackContribution){
466 EP->GetQContributionXArraysub1()->AddAt(weight*cos(2*track->Phi()),idtemp);
467 EP->GetQContributionYArraysub1()->AddAt(weight*sin(2*track->Phi()),idtemp);
472 mQx2 += (weight*cos(2*track->Phi()));
473 mQy2 += (weight*sin(2*track->Phi()));
474 if (fSaveTrackContribution){
475 EP->GetQContributionXArraysub2()->AddAt(weight*cos(2*track->Phi()),idtemp);
476 EP->GetQContributionYArraysub2()->AddAt(weight*sin(2*track->Phi()),idtemp);
481 else if( trackcounter1 >= int(nt/2.)){
482 mQx2 += (weight*cos(2*track->Phi()));
483 mQy2 += (weight*sin(2*track->Phi()));
484 if (fSaveTrackContribution){
485 EP->GetQContributionXArraysub2()->AddAt(weight*cos(2*track->Phi()),idtemp);
486 EP->GetQContributionYArraysub2()->AddAt(weight*sin(2*track->Phi()),idtemp);
491 mQx1 += (weight*cos(2*track->Phi()));
492 mQy1 += (weight*sin(2*track->Phi()));
493 if (fSaveTrackContribution){
494 EP->GetQContributionXArraysub1()->AddAt(weight*cos(2*track->Phi()),idtemp);
495 EP->GetQContributionYArraysub1()->AddAt(weight*sin(2*track->Phi()),idtemp);
500 } else if (fSplitMethod == AliEPSelectionTask::kEta) {
502 for (Int_t i = 0; i < nt; i++) {
504 track = dynamic_cast<AliVTrack*> (tracklist->At(i));
505 if (!track) continue;
506 weight = GetWeight(track);
507 Double_t eta = track->Eta();
508 idtemp = track->GetID();
509 if ((fAnalysisInput.CompareTo("AOD")==0) && (fAODfilterbit == 128)) idtemp = idtemp*(-1) - 1;
511 if (eta > fEtaGap/2.) {
512 mQx1 += (weight*cos(2*track->Phi()));
513 mQy1 += (weight*sin(2*track->Phi()));
514 if (fSaveTrackContribution){
515 EP->GetQContributionXArraysub1()->AddAt(weight*cos(2*track->Phi()),idtemp);
516 EP->GetQContributionYArraysub1()->AddAt(weight*sin(2*track->Phi()),idtemp);
518 } else if (eta < -1.*fEtaGap/2.) {
519 mQx2 += (weight*cos(2*track->Phi()));
520 mQy2 += (weight*sin(2*track->Phi()));
521 if (fSaveTrackContribution){
522 EP->GetQContributionXArraysub2()->AddAt(weight*cos(2*track->Phi()),idtemp);
523 EP->GetQContributionYArraysub2()->AddAt(weight*sin(2*track->Phi()),idtemp);
528 printf("plane resolution determination method not available!\n\n ");
532 mQ[0].Set(mQx1,mQy1);
533 mQ[1].Set(mQx2,mQy2);
538 //________________________________________________________________________
539 void AliEPSelectionTask::SetPersonalESDtrackCuts(AliESDtrackCuts* trackcuts){
542 delete fESDtrackCuts;
545 if (fAnalysisInput.CompareTo("AOD")==0){
546 AliInfo("ESD track cuts not possible for AOD analysis; please use SetPersonalAODtrackCuts(); using TPC only track cuts");
552 fESDtrackCuts = trackcuts;
555 //________________________________________________________________________
556 void AliEPSelectionTask::SetPersonalAODtrackCuts(UInt_t filterbit, Float_t etalow, Float_t etaup, Float_t ptlow, Float_t ptup){
559 delete fESDtrackCuts;
562 if (fAnalysisInput.CompareTo("ESD")==0){
563 AliInfo("AOD track cuts not possible for ESD analysis; please use SetPersonalESDtrackCuts(); using TPC only track cuts");
569 fESDtrackCuts = new AliESDtrackCuts();
570 fESDtrackCuts->SetPtRange(ptlow,ptup);
571 fESDtrackCuts->SetEtaRange(etalow,etaup);
572 fAODfilterbit = filterbit;
575 //_____________________________________________________________________________
577 void AliEPSelectionTask::SetTrackType(TString tracktype){
578 fTrackType = tracktype;
580 if (fTrackType.CompareTo("GLOBAL")==0){
581 fESDtrackCuts = AliESDtrackCuts::GetStandardITSTPCTrackCuts2010(kTRUE);
584 if (fTrackType.CompareTo("TPC")==0){
585 fESDtrackCuts = AliESDtrackCuts::GetStandardTPCOnlyTrackCuts();
588 fESDtrackCuts->SetPtRange(0.15,20.);
589 fESDtrackCuts->SetEtaRange(-0.8,0.8);
593 //________________________________________________________________________
594 Double_t AliEPSelectionTask::GetWeight(TObject* track1)
597 AliVTrack* track = dynamic_cast<AliVTrack*>(track1);
598 if (fUsePtWeight && track) {
599 if (track->Pt()<2) ptweight=track->Pt();
602 return ptweight*GetPhiWeight(track);
605 //________________________________________________________________________
606 Double_t AliEPSelectionTask::GetPhiWeight(TObject* track1)
608 Double_t phiweight=1;
609 AliVTrack* track = dynamic_cast<AliVTrack*>(track1);
611 if (fUsePhiWeight && fPhiDist && track) {
612 Double_t nParticles = fPhiDist->Integral();
613 Double_t nPhibins = fPhiDist->GetNbinsX();
615 Double_t Phi = track->Phi();
617 while (Phi<0) Phi += TMath::TwoPi();
618 while (Phi>TMath::TwoPi()) Phi -= TMath::TwoPi();
620 Double_t PhiDistValue = fPhiDist->GetBinContent(1+TMath::FloorNint((track->Phi())*nPhibins/TMath::TwoPi()));
622 if (PhiDistValue > 0) phiweight = nParticles/nPhibins/PhiDistValue;
627 //__________________________________________________________________________
628 void AliEPSelectionTask::SetPhiDist()
630 if(!fUserphidist) { // if it's already set and custom class is required, we use the one provided by the user
632 fPhiDist = (TH1F*) fEPContainer->GetObject(fRunNumber, "Default");
633 if (!fPhiDist) AliFatal(Form("Cannot find OADB phi distribution for run %d", fRunNumber));
637 AliInfo("Using Custom Phi Distribution");
646 for (int i=1; i<fPhiDist->GetNbinsX(); i++){
647 if (!((fPhiDist->GetBinContent(i))>0)) {
652 cout << "empty bins - rebinning!" << endl;
660 AliError("After Maximum of rebinning still empty Phi-bins!!!");
664 //__________________________________________________________________________
665 void AliEPSelectionTask::SetPersonalPhiDistribution(const char* infilename, char* listname)
668 fUserphidist = kTRUE;
671 TObject* list = f.Get(listname);
672 fPhiDist = (TH1F*)list->FindObject("fHOutPhi");
673 if (!fPhiDist) AliFatal("Phi Distribution not found!!!");
679 //_________________________________________________________________________
680 TObjArray* AliEPSelectionTask::GetAODTracksAndMaxID(AliAODEvent* aod, Int_t& maxid)
682 TObjArray *acctracks = new TObjArray();
686 Int_t maxidtemp = -1;
691 fESDtrackCuts->GetPtRange(ptlow,ptup);
692 fESDtrackCuts->GetEtaRange(etalow,etaup);
694 for (Int_t i = 0; i < aod->GetNumberOfTracks() ; i++){
695 tr = aod->GetTrack(i);
696 maxidtemp = tr->GetID();
697 if(maxidtemp < 0 && fAODfilterbit != 128) continue;
698 if(maxidtemp > -1 && fAODfilterbit == 128) continue;
699 if (fAODfilterbit == 128) maxidtemp = maxidtemp*(-1) - 1;
700 if (maxidtemp > maxid1) maxid1 = maxidtemp;
701 if(tr->TestFilterBit(fAODfilterbit) && tr->Pt() < ptup && tr->Pt() > ptlow && tr->Eta() < etaup && tr->Eta() > etalow){