1 /**************************************************************************
2 * Copyright(c) 1998-1999, 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 *
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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 // AliAnalysisTaskPhiFlow:
17 // author: Redmer Alexander Bertens (rbertens@cern.ch)
18 // analyis task for phi-meson reconstruction and determination of v_n
19 // AliPhiMesonHelperTrack provides a lightweight helper track for reconstruction
20 // new in this version (use with caution): vzero event plane, event mixing
27 #include "TObjArray.h"
28 #include "AliAnalysisTaskSE.h"
29 #include "AliAnalysisManager.h"
30 #include "AliAODEvent.h"
31 #include "AliAODInputHandler.h"
32 #include "AliCentrality.h"
33 #include "AliAnalysisTaskPhiFlow.h"
34 #include "AliFlowBayesianPID.h"
35 #include "AliPIDCombined.h"
36 #include "AliMCEvent.h"
38 #include "AliFlowCandidateTrack.h"
39 #include "AliFlowTrackCuts.h"
40 #include "AliFlowEventSimple.h"
41 #include "AliFlowTrackSimple.h"
42 #include "AliFlowCommonConstants.h"
43 #include "AliFlowEvent.h"
45 #include "AliAODVZERO.h"
46 #include "AliPIDResponse.h"
47 #include "AliAODMCParticle.h"
48 #include "AliAnalysisTaskVnV0.h"
49 #include "AliEventPoolManager.h"
51 class AliFlowTrackCuts;
56 ClassImp(AliAnalysisTaskPhiFlow)
57 ClassImp(AliPhiMesonHelperTrack)
59 AliAnalysisTaskPhiFlow::AliAnalysisTaskPhiFlow() : AliAnalysisTaskSE(),
60 fDebug(0), fIsMC(0), fEventMixing(0), fTypeMixing(0), fQA(0), fV0(0), fMassBins(1), fMinMass(-1.), fMaxMass(0.), fCutsRP(NULL), fNullCuts(0), fPIDResponse(0), fFlowEvent(0), fBayesianResponse(0), fCandidates(0), fCandidateEtaPtCut(0), fCandidateMinEta(0), fCandidateMaxEta(0), fCandidateMinPt(0), fCandidateMaxPt(0), fNPtBins(18), fCentrality(999), fVertex(999), fAOD(0), fPoolManager(0), fOutputList(0), fEventStats(0), fCentralityPass(0), fCentralityNoPass(0), fNOPID(0), fPIDk(0),fNOPIDTOF(0), fPIDTOF(0), fPtP(0), fPtN(0), fPtKP(0), fPtKN(0), fMultCorAfterCuts(0), fMultvsCentr(0), fCentralityMin(0), fCentralityMax(100), fkCentralityMethodA(0), fkCentralityMethodB(0), fCentralityCut2010(0), fCentralityCut2011(0), fPOICuts(0), fVertexRange(0), fPhi(0), fPt(0), fEta(0), fVZEROA(0), fVZEROC(0), fTPCM(0)/*, fDeltaDipAngle(0), fDeltaDipPt(0), fApplyDeltaDipCut(0)*/, fDCAAll(0), fDCAXYQA(0), fDCAZQA(0), fDCAPrim(0), fDCASecondaryWeak(0), fDCAMaterial(0), fSubEventDPhiv2(0), fSkipEventSelection(0), fUsePidResponse(0), fPIDCombined(0)
62 // Default constructor
63 for(Int_t i(0); i < 7; i++) fPIDConfig[i] = 0.;
64 for(Int_t i(0); i < 5; i++) fDCAConfig[i] = 0.;
65 for(Int_t i(0); i < 20; i++) {
66 fVertexMixingBins[i] = 0;
67 fCentralityMixingBins[i] = 0;
69 fMixingParameters[0] = 1000; fMixingParameters[1] = 50000; fMixingParameters[2] = 5;
70 for(Int_t i(0); i < 18; i++) {
71 for(Int_t j(0); j < 2; j++) fV0Data[i][j] = 0;
72 fInvMNP[i] = 0; fInvMNN[i] = 0; fInvMPP[i] = 0; fPtSpectra[i] = 0; fPtBins[i] = 0.;
75 //_____________________________________________________________________________
76 AliAnalysisTaskPhiFlow::AliAnalysisTaskPhiFlow(const char *name) : AliAnalysisTaskSE(name),
77 fDebug(0), fIsMC(0), fEventMixing(0), fTypeMixing(0), fQA(0), fV0(0), fMassBins(1), fMinMass(-1.), fMaxMass(0.), fCutsRP(NULL), fNullCuts(0), fPIDResponse(0), fFlowEvent(0), fBayesianResponse(0), fCandidates(0), fCandidateEtaPtCut(0), fCandidateMinEta(0), fCandidateMaxEta(0), fCandidateMinPt(0), fCandidateMaxPt(0), fNPtBins(18), fCentrality(999), fVertex(999), fAOD(0), fPoolManager(0), fOutputList(0), fEventStats(0), fCentralityPass(0), fCentralityNoPass(0), fNOPID(0), fPIDk(0), fNOPIDTOF(0), fPIDTOF(0), fPtP(0), fPtN(0), fPtKP(0), fPtKN(0), fMultCorAfterCuts(0), fMultvsCentr(0), fCentralityMin(0), fCentralityMax(100), fkCentralityMethodA(0), fkCentralityMethodB(0), fCentralityCut2010(0), fCentralityCut2011(0), fPOICuts(0), fVertexRange(0), fPhi(0), fPt(0), fEta(0), fVZEROA(0), fVZEROC(0), fTPCM(0)/*, fDeltaDipAngle(0), fDeltaDipPt(0), fApplyDeltaDipCut(0)*/, fDCAAll(0), fDCAXYQA(0), fDCAZQA(0), fDCAPrim(0), fDCASecondaryWeak(0), fDCAMaterial(0), fSubEventDPhiv2(0), fSkipEventSelection(0), fUsePidResponse(0), fPIDCombined(0)
80 for(Int_t i(0); i < 7; i++) fPIDConfig[i] = 0.;
81 for(Int_t i(0); i < 5; i++) fDCAConfig[i] = 0.;
82 for(Int_t i(0); i < 20; i++) {
83 fVertexMixingBins[i] = 0;
84 fCentralityMixingBins[i] = 0;
86 fMixingParameters[0] = 1000; fMixingParameters[1] = 50000; fMixingParameters[2] = 5;
87 for(Int_t i(0); i < 18; i++) {
88 for(Int_t j(0); j < 2; j++) fV0Data[i][j] = 0;
89 fInvMNP[i] = 0; fInvMNN[i] = 0; fInvMPP[i] = 0; fPtSpectra[i] = 0; fPtBins[i] = 0.;
91 DefineInput(0, TChain::Class());
92 DefineOutput(1, TList::Class());
93 DefineOutput(2, AliFlowEventSimple::Class());
94 if(fDebug > 0) cout << " === Created instance of AliAnaysisTaskPhiFlow === " << endl;
96 //_____________________________________________________________________________
97 AliAnalysisTaskPhiFlow::~AliAnalysisTaskPhiFlow()
100 if (fNullCuts) delete fNullCuts;
101 if (fOutputList) delete fOutputList;
102 if (fCandidates) delete fCandidates;
103 if (fFlowEvent) delete fFlowEvent;
104 if (fBayesianResponse) delete fBayesianResponse;
105 if (fEventMixing) delete fPoolManager;
106 if (fPIDCombined) delete fPIDCombined;
107 if (fDebug > 0) cout << " === Deleted instance of AliAnalysisTaskPhiFlow === " << endl;
109 //_____________________________________________________________________________
110 TH1F* AliAnalysisTaskPhiFlow::BookHistogram(const char* name)
112 // Return a pointer to a TH1 with predefined binning
113 if(fDebug > 0) cout << " *** BookHistogram() *** " << name << endl;
114 TH1F *hist = new TH1F(name, Form("M_{INV} (%s)", name), 60, .99, 1.092);
115 hist->GetXaxis()->SetTitle("M_{INV} (GeV / c^{2})");
116 hist->GetYaxis()->SetTitle("No. of pairs");
117 hist->SetMarkerStyle(kFullCircle);
119 fOutputList->Add(hist);
122 //_____________________________________________________________________________
123 TH2F* AliAnalysisTaskPhiFlow::BookPIDHistogram(const char* name, Bool_t TPC)
125 // Return a pointer to a TH2 with predefined binning
126 if(fDebug > 0) cout << " *** BookPIDHisotgram() *** " << endl;
129 hist = new TH2F(name, Form("PID (%s)", name), 100, 0, 5, 100, 0, 1000);
130 hist->GetYaxis()->SetTitle("dE/dx (a.u.)");
133 hist = new TH2F(name, Form("PID (%s)", name), 100, 0, 5, 100, 0, 1.5);
134 hist->GetYaxis()->SetTitle("#beta");
136 hist->GetXaxis()->SetTitle("P (GeV / c)");
137 fOutputList->Add(hist);
140 //_____________________________________________________________________________
141 TH1F* AliAnalysisTaskPhiFlow::InitPtSpectraHistograms(Float_t nmin, Float_t nmax)
143 // intialize p_t histograms for each p_t bin
144 if(fDebug > 0) cout << " *** InitPtSpectraHistograms() *** " << endl;
145 TH1F* hist = new TH1F(Form("%4.2f p_{t} %4.2f", nmin, nmax), Form("%f p_{t} %f", nmin, nmax), 60, nmin, nmax);
146 hist->GetXaxis()->SetTitle("p_{T} GeV / c");
147 fOutputList->Add(hist);
150 //_____________________________________________________________________________
151 TH1F* AliAnalysisTaskPhiFlow::BookPtHistogram(const char* name)
153 // Return a pointer to a p_T spectrum histogram
154 if(fDebug > 0) cout << " *** BookPtHistogram() *** " << endl;
155 TH1F* ratio = new TH1F(name, name, 100, 0, 7);
156 ratio->GetXaxis()->SetTitle("p_{T} ( GeV / c^{2} )");
157 ratio->GetYaxis()->SetTitle("No. of events");
159 fOutputList->Add(ratio);
162 //_____________________________________________________________________________
163 void AliAnalysisTaskPhiFlow::AddPhiIdentificationOutputObjects()
165 // Add Phi Identification Output Objects
166 if(fDebug > 0) cout << " ** AddPhiIdentificationOutputObjects() *** " << endl;
168 fEventStats = new TH1F("fHistStats", "Event Statistics", 18, -.25, 4.25);
169 fEventStats->GetXaxis()->SetTitle("No. of events");
170 fEventStats->GetYaxis()->SetTitle("Statistics");
171 fOutputList->Add(fEventStats);
173 fCentralityPass = new TH1F("fCentralityPass", "Centrality Pass", 101, -1, 100);
174 fOutputList->Add(fCentralityPass);
176 fCentralityNoPass = new TH1F("fCentralityNoPass", "Centrality No Pass", 101, -1, 100);
177 fOutputList->Add(fCentralityNoPass);
178 fNOPID = BookPIDHistogram("TPC signal, all particles", kTRUE);
179 fPIDk = BookPIDHistogram("TPC signal, kaons", kTRUE);
180 fNOPIDTOF = BookPIDHistogram("TOF signal, all particles", kFALSE);
181 fPIDTOF = BookPIDHistogram("TOF signal, kaons", kFALSE);
183 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++) {
184 fInvMNP[ptbin] = BookHistogram(Form("NP, %4.2f < p_{T} < %4.2f GeV", fPtBins[ptbin], fPtBins[ptbin+1]));
185 fInvMNN[ptbin] = BookHistogram(Form("NN, %4.2f < p_{T} < %4.2f GeV", fPtBins[ptbin], fPtBins[ptbin+1]));
186 fInvMPP[ptbin] = BookHistogram(Form("PP, %4.2f < p_{T} < %4.2f GeV", fPtBins[ptbin], fPtBins[ptbin+1]));
189 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++) fPtSpectra[ptbin] = InitPtSpectraHistograms(fPtBins[ptbin], fPtBins[ptbin+1]);
190 fPtP = BookPtHistogram("i^{+}");
191 fPtN = BookPtHistogram("i^{-}");
192 fPtKP = BookPtHistogram("K^{+}");
193 fPtKN = BookPtHistogram("K^{-}");
194 fPhi = new TH1F("fPhi", "#phi distribution", 100, -.5, 7);
195 fOutputList->Add(fPhi);
196 fPt = new TH1F("fPt", "p_{T}", 100, 0, 5.5);
197 fOutputList->Add(fPt);
198 fEta = new TH1F("fEta", "#eta distribution", 100, -1.1, 1.1);
199 fOutputList->Add(fEta);
200 fVZEROA = new TH1F("fVZEROA", "VZERO A Multiplicity", 1000, 0, 10000);
201 fOutputList->Add(fVZEROA);
202 fVZEROC = new TH1F("fVZEROC", "VZERO C Multiplicity", 1000, 0, 10000);
203 fOutputList->Add(fVZEROC);
204 fTPCM = new TH1F("fTPCM", "TPC multiplicity", 1000, 0, 10000);
205 fOutputList->Add(fTPCM);
206 fDCAXYQA = new TH1F("fDCAXYQA", "fDCAXYQA", 1000, -5, 5);
207 fOutputList->Add(fDCAXYQA);
208 fDCAZQA = new TH1F("fDCAZQA", "fDCAZQA", 1000, -5, 5);
209 fOutputList->Add(fDCAZQA);
210 if(fCentralityCut2010 || fCentralityCut2011) {
211 fMultCorAfterCuts = new TH2F("fMultCorAfterCuts", "TPC vs Global multiplicity (After cuts); Global multiplicity; TPC multiplicity", 100, 0, 3000, 100, 0, 3000);
212 fOutputList->Add(fMultCorAfterCuts);
213 fMultvsCentr = new TH2F("fMultvsCentr", "Multiplicity vs centrality; centrality; Multiplicity", 9, -0.5, 100.5, 101, 0, 3000);
214 fOutputList->Add(fMultvsCentr);
218 fDCAAll = new TH2F("fDCAAll", "fDCAAll", 1000, 0, 10, 1000, -5, 5);
219 fOutputList->Add(fDCAAll);
220 fDCAPrim = new TH2F("fDCAprim","fDCAprim", 1000, 0, 10, 1000, -5, 5);
221 fOutputList->Add(fDCAPrim);
222 fDCASecondaryWeak = new TH2F("fDCASecondaryWeak","fDCASecondaryWeak", 1000, 0, 10, 1000, -5, 5);
223 fOutputList->Add(fDCASecondaryWeak);
224 fDCAMaterial = new TH2F("fDCAMaterial","fDCAMaterial", 1000, 0, 10, 1000, -5, 5);
225 fOutputList->Add(fDCAMaterial);
228 fSubEventDPhiv2 = new TProfile("fSubEventDPhiv2", "fSubEventDPhiv2", 5, 0, 5);
229 fSubEventDPhiv2->GetXaxis()->SetBinLabel(1, "<#Psi_{a} - #Psi_{b}>");
230 fSubEventDPhiv2->GetXaxis()->SetBinLabel(2, "<#Psi_{a} - #Psi_{c}>");
231 fSubEventDPhiv2->GetXaxis()->SetBinLabel(3, "<#Psi_{b} - #Psi_{c}>");
232 fSubEventDPhiv2->GetXaxis()->SetBinLabel(4, "#sqrt{#frac{<#Psi_{a} - #Psi_{b}><#Psi_{a} - #Psi_{c}>}{<#Psi_{b} - #Psi_{c}>}}");
233 fSubEventDPhiv2->GetXaxis()->SetBinLabel(5, "#sqrt{#frac{<#Psi_{a} - #Psi_{c}><#Psi_{b} - #Psi_{c}>}{<#Psi_{a} - #Psi_{b}>}}");
234 fOutputList->Add(fSubEventDPhiv2);
235 const char* V0[] = {"V0A", "V0C"};
236 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++)
237 for(Int_t iV0(0); iV0 < 2; iV0++) {
238 fV0Data[ptbin][iV0] = new TProfile(Form("%s v2 %4.2f < p_{T} < %4.2f GeV", V0[iV0], fPtBins[ptbin], fPtBins[ptbin+1]), Form("%s v2 %4.2f < p_{T} < %4.2f GeV", V0[iV0], fPtBins[ptbin], fPtBins[ptbin+1]), fMassBins, fMinMass, fMaxMass);
239 fOutputList->Add(fV0Data[ptbin][iV0]);
243 //_____________________________________________________________________________
244 void AliAnalysisTaskPhiFlow::UserCreateOutputObjects()
246 // Create user defined output objects
247 if(fDebug > 0) cout << " *** UserCreateOutputObjects() *** " << endl;
248 fNullCuts = new AliFlowTrackCuts("null_cuts");
249 fBayesianResponse = new AliFlowBayesianPID();
251 fPIDCombined = new AliPIDCombined;
252 fPIDCombined->SetDefaultTPCPriors();
253 fPIDCombined->SetDetectorMask(AliPIDResponse::kDetTPC|AliPIDResponse::kDetTOF);
256 if(fSkipEventSelection || fIsMC) fBayesianResponse->SetMC(kTRUE);
258 for(Int_t i = 0; i < 7; i++) t+=TMath::Abs(fPIDConfig[i]);
259 if(t < 0.1) AliFatal("No valid PID procedure recognized -- terminating analysis !!!");
260 if(fNPtBins > 18) AliFatal("Invalid number of pt bins initialied ( > 18 ) -- terminating analysis !!!");
261 AliFlowCommonConstants* cc = AliFlowCommonConstants::GetMaster();
262 cc->SetNbinsQ(500); cc->SetNbinsPhi(180); cc->SetNbinsMult(10000);
263 cc->SetQMin(0.0); cc->SetPhiMin(0.0); cc->SetMultMin(0);
264 cc->SetQMax(3.0); cc->SetPhiMax(TMath::TwoPi()); cc->SetMultMax(10000);
265 cc->SetNbinsMass(fMassBins); cc->SetNbinsEta(200); (fMassBins == 1) ? cc->SetNbinsPt(15) : cc->SetNbinsPt(100); // high pt
266 cc->SetMassMin(fMinMass); cc->SetEtaMin(-5.0); cc->SetPtMin(0);
267 cc->SetMassMax(fMaxMass); cc->SetEtaMax(+5.0); (fMassBins == 1) ? cc->SetPtMax(15) : cc->SetPtMax(10); // high pt
268 fBayesianResponse->SetNewTrackParam();
269 AliAnalysisManager *man = AliAnalysisManager::GetAnalysisManager();
271 AliInputEventHandler* inputHandler = (AliInputEventHandler*)(man->GetInputEventHandler());
272 if (inputHandler) fPIDResponse = inputHandler->GetPIDResponse();
274 // Create all output objects and store them to a list
275 fOutputList = new TList();
276 fOutputList->SetOwner(kTRUE);
277 // Create and post the Phi identification output objects
278 AddPhiIdentificationOutputObjects();
279 PostData(1, fOutputList);
280 // create candidate array
281 fCandidates = new TObjArray(1000);
282 fCandidates->SetOwner(kTRUE);
283 // create and post flowevent
284 fFlowEvent = new AliFlowEvent(10000);
285 PostData(2, fFlowEvent);
286 if(fEventMixing) fPoolManager = InitializeEventMixing();
288 //_____________________________________________________________________________
289 AliEventPoolManager* AliAnalysisTaskPhiFlow::InitializeEventMixing()
291 // initialize event mixing
292 if(fDebug > 0) cout << " *** InitializeEventMixing() *** " << endl;
294 for(Int_t i(0); i < 19; i++) {
295 if (fCentralityMixingBins[i+1] < fCentralityMixingBins[i]) { _c = i; break; }
298 for(Int_t i(0); i < 19; i++) {
299 if (fVertexMixingBins[i+1] < fVertexMixingBins[i]) { _v = i; break; }
302 if(fDebug > 0 ) cout << Form(" --> found %d centrality bins for mixing, %d vertex bins for mixing", _c, _v) << endl;
303 Double_t centralityBins[_c];
304 Double_t vertexBins[_v];
305 for(Int_t i(0); i < _c + 1; i++) centralityBins[i] = fCentralityMixingBins[i];
306 for(Int_t i(0); i < _v + 1; i++) vertexBins[i] = fVertexMixingBins[i];
307 return new AliEventPoolManager(fMixingParameters[0], fMixingParameters[1], _c, (Double_t*)centralityBins, _v, (Double_t*)vertexBins);
309 //_____________________________________________________________________________
310 template <typename T> Double_t AliAnalysisTaskPhiFlow::InvariantMass(const T* track1, const T* track2) const
312 // Return the invariant mass of two tracks, assuming both tracks are kaons
313 if(fDebug > 1) cout << " *** InvariantMass() *** " << endl;
314 if ((!track2) || (!track1)) return 0.;
315 Double_t masss = TMath::Power(4.93676999999999977e-01, 2);
316 Double_t pxs = TMath::Power((track1->Px() + track2->Px()), 2);
317 Double_t pys = TMath::Power((track1->Py() + track2->Py()), 2);
318 Double_t pzs = TMath::Power((track1->Pz() + track2->Pz()), 2);
319 Double_t e1 = TMath::Sqrt(track1->P() * track1->P() + masss);
320 Double_t e2 = TMath::Sqrt(track2->P() * track2->P() + masss);
321 Double_t es = TMath::Power((e1 + e2), 2);
322 if ((es - (pxs + pys + pzs)) < 0) return 0.;
323 return TMath::Sqrt((es - (pxs + pys + pzs)));
325 //_____________________________________________________________________________
327 template <typename T> Double_t AliAnalysisTaskPhiFlow::DeltaDipAngle(const T* track1, const T* track2) const
329 // Calculate the delta dip angle between two particles
330 if(fDebug > 1) cout << " *** DeltaDipAngle() *** " << endl;
331 if (track1->P()*track2->P() == 0) return 999;
332 return TMath::ACos(((track1->Pt() * track2->Pt()) + (track1->Pz() * track2->Pz())) / (track1->P() * track2->P()));
334 //_____________________________________________________________________________
335 template <typename T> Bool_t AliAnalysisTaskPhiFlow::CheckDeltaDipAngle(const T* track1, const T* track2) const
337 // Check if pair passes delta dip angle cut within 0 < p_t < fDeltaDipPt
338 if(fDebug > 1) cout << " *** CheckDeltaDipAngle() *** " << endl;
339 if ((TMath::Abs(DeltaDipAngle(track1, track2)) < fDeltaDipAngle) && (PhiPt(track1, track2) < fDeltaDipPt)) return kFALSE;
343 //_____________________________________________________________________________
344 template <typename T> Bool_t AliAnalysisTaskPhiFlow::CheckCandidateEtaPtCut(const T* track1, const T* track2) const
346 // Check if pair passes eta and pt cut
347 if(fDebug > 1) cout << " *** CheckCandidateEtaPtCut() *** " << endl;
348 if (fCandidateMinPt > PhiPt(track1, track2) || fCandidateMaxPt < PhiPt(track1, track2)) return kFALSE;
349 TVector3 a(track1->Px(), track1->Py(), track1->Pz());
350 TVector3 b(track2->Px(), track2->Py(), track2->Pz());
352 if (fCandidateMinEta > c.Eta() || fCandidateMaxEta < c.Eta()) return kFALSE;
355 //_____________________________________________________________________________
356 template <typename T> Bool_t AliAnalysisTaskPhiFlow::EventCut(T* event)
359 if(fDebug > 0) cout << " *** EventCut() *** " << endl;
360 if (!event) return kFALSE;
361 if (fSkipEventSelection) return kTRUE;
362 if (!CheckVertex(event)) return kFALSE;
363 if (!CheckCentrality(event)) return kFALSE;
364 if(fQA) PlotMultiplcities(event);
367 //_____________________________________________________________________________
368 template <typename T> void AliAnalysisTaskPhiFlow::PlotMultiplcities(const T* event) const
370 // QA multiplicity plots
371 if(fDebug > 1) cout << " *** PlotMultiplcities() *** " << endl;
372 fVZEROA->Fill(event->GetVZEROData()->GetMTotV0A());
373 fVZEROC->Fill(event->GetVZEROData()->GetMTotV0C());
374 fTPCM->Fill(event->GetNumberOfTracks());
376 //_____________________________________________________________________________
377 template <typename T> Bool_t AliAnalysisTaskPhiFlow::CheckVertex(const T* event)
379 // Check if event vertex is within given range
380 if(fDebug > 0) cout << " *** CheckVertex() *** " << endl;
381 if (!event->GetPrimaryVertex()) return 0x0;
382 fVertex = event->GetPrimaryVertex()->GetZ();
383 if (TMath::Abs(fVertex) > fVertexRange) return 0x0;
386 //_____________________________________________________________________________
387 template <typename T> Bool_t AliAnalysisTaskPhiFlow::CheckCentrality(T* event)
389 // Check if event is within the set centrality range. Falls back to V0 centrality determination if no method is set
390 if(fDebug > 0) cout << " *** CheckCentrality() *** " << endl;
391 if (!fkCentralityMethodA) AliFatal("No centrality method set! FATAL ERROR!");
392 fCentrality = event->GetCentrality()->GetCentralityPercentile(fkCentralityMethodA);
394 // if a second centrality estimator is requited, set it
395 (fkCentralityMethodB) ? cenB = event->GetCentrality()->GetCentralityPercentile(fkCentralityMethodB) : cenB = fCentrality;
396 if (TMath::Abs(fCentrality-cenB) > 5 || cenB >= 80 || cenB < 0 || fCentrality <= fCentralityMin || fCentrality > fCentralityMax) {
397 if(fQA) fCentralityNoPass->Fill(fCentrality) ;
400 const Int_t nGoodTracks = event->GetNumberOfTracks();
401 if(fCentralityCut2010) { // cut on outliers
402 Float_t multTPC(0.); // tpc mult estimate
403 Float_t multGlob(0.); // global multiplicity
404 for(Int_t iTracks = 0; iTracks < nGoodTracks; iTracks++) { // fill tpc mult
405 AliAODTrack* trackAOD = event->GetTrack(iTracks);
406 if (!trackAOD) continue;
407 if (!(trackAOD->TestFilterBit(1))) continue;
408 if ((trackAOD->Pt() < .2) || (trackAOD->Pt() > 5.0) || (TMath::Abs(trackAOD->Eta()) > .8) || (trackAOD->GetTPCNcls() < 70) || (trackAOD->GetDetPid()->GetTPCsignal() < 10.0) || (trackAOD->Chi2perNDF() < 0.2)) continue;
411 for(Int_t iTracks = 0; iTracks < nGoodTracks; iTracks++) { // fill global mult
412 AliAODTrack* trackAOD = event->GetTrack(iTracks);
413 if (!trackAOD) continue;
414 if (!(trackAOD->TestFilterBit(16))) continue;
415 if ((trackAOD->Pt() < .2) || (trackAOD->Pt() > 5.0) || (TMath::Abs(trackAOD->Eta()) > .8) || (trackAOD->GetTPCNcls() < 70) || (trackAOD->GetDetPid()->GetTPCsignal() < 10.0) || (trackAOD->Chi2perNDF() < 0.1)) continue;
416 Double_t b[2] = {-99., -99.};
417 Double_t bCov[3] = {-99., -99., -99.};
418 if (!(trackAOD->PropagateToDCA(event->GetPrimaryVertex(), event->GetMagneticField(), 100., b, bCov))) continue;
419 if ((TMath::Abs(b[0]) > 0.3) || (TMath::Abs(b[1]) > 0.3)) continue;
422 // printf(" mult TPC %.2f, mult Glob %.2f \n", multTPC, multGlob);
423 if(! (multTPC > (-40.3+1.22*multGlob) && multTPC < (32.1+1.59*multGlob))) return kFALSE;
425 fMultCorAfterCuts->Fill(multGlob, multTPC);
426 fMultvsCentr->Fill(fCentrality, multTPC);
430 if(fCentralityCut2011) { // cut on outliers
431 Float_t multTPC(0.); // tpc mult estimate
432 Float_t multGlob(0.); // global multiplicity
433 for(Int_t iTracks = 0; iTracks < nGoodTracks; iTracks++) { // fill tpc mult
434 AliAODTrack* trackAOD = event->GetTrack(iTracks);
435 if (!trackAOD) continue;
436 if (!(trackAOD->TestFilterBit(1))) continue;
437 if ((trackAOD->Pt() < .2) || (trackAOD->Pt() > 5.0) || (TMath::Abs(trackAOD->Eta()) > .8) || (trackAOD->GetTPCNcls() < 70) || (trackAOD->GetDetPid()->GetTPCsignal() < 10.0) || (trackAOD->Chi2perNDF() < 0.2)) continue;
440 for(Int_t iTracks = 0; iTracks < nGoodTracks; iTracks++) { // fill global mult
441 AliAODTrack* trackAOD = event->GetTrack(iTracks);
442 if (!trackAOD) continue;
443 if (!(trackAOD->TestFilterBit(16))) continue;
444 if ((trackAOD->Pt() < .2) || (trackAOD->Pt() > 5.0) || (TMath::Abs(trackAOD->Eta()) > .8) || (trackAOD->GetTPCNcls() < 70) || (trackAOD->GetDetPid()->GetTPCsignal() < 10.0) || (trackAOD->Chi2perNDF() < 0.1)) continue;
445 Double_t b[2] = {-99., -99.};
446 Double_t bCov[3] = {-99., -99., -99.};
447 if (!(trackAOD->PropagateToDCA(event->GetPrimaryVertex(), event->GetMagneticField(), 100., b, bCov))) continue;
448 if ((TMath::Abs(b[0]) > 0.3) || (TMath::Abs(b[1]) > 0.3)) continue;
451 //printf(" mult TPC %.2f, mult Glob %.2f \n", multTPC, multGlob);
452 if(! (multTPC > (-36.73 + 1.48*multGlob) && multTPC < (62.87 + 1.78*multGlob))) return kFALSE;
454 fMultCorAfterCuts->Fill(multGlob, multTPC);
455 fMultvsCentr->Fill(fCentrality, multTPC);
459 fCentralityPass->Fill(fCentrality);
462 //_____________________________________________________________________________
463 void AliAnalysisTaskPhiFlow::InitializeBayesianPID(AliAODEvent* event)
465 // Initialize the Bayesian PID object for AOD
466 if(fDebug > 0) cout << " *** InitializeBayesianPID() *** " << endl;
467 fBayesianResponse->SetDetResponse(event, fCentrality);
469 //_____________________________________________________________________________
470 template <typename T> Bool_t AliAnalysisTaskPhiFlow::PassesTPCbayesianCut(T* track) const
472 // Check if the particle passes the TPC TOF bayesian cut.
473 if(fDebug > 1) cout << " *** PassesTPCbayesianCut() *** " << endl;
474 fBayesianResponse->ComputeProb(track);
475 if (!fBayesianResponse->GetCurrentMask(0)) return kFALSE; // return false if TPC has no response
476 Float_t *probabilities = fBayesianResponse->GetProb();
477 if (probabilities[3] > fPIDConfig[6]) {
478 if(fQA) {fPhi->Fill(track->Phi()); fPt->Fill(track->Pt()); fEta->Fill(track->Eta());}
483 //_____________________________________________________________________________
484 Bool_t AliAnalysisTaskPhiFlow::PassesDCACut(AliAODTrack* track) const
486 // check if track passes dca cut according to dca routine
487 // setup the routine as follows:
488 // fDCAConfig[0] < -1 no pt dependence
489 // fDCAConfig[0] = 0 do nothing
490 // fDCAConfig[0] > 1 pt dependent dca cut
491 if(fDebug > 1) cout << " *** PassesDCACut() *** " << endl;
492 if(fIsMC) return kTRUE;
493 if( (fDCAConfig[0] < 0.1) && (fDCAConfig[0] > -0.1) ) {
495 Double_t b[2] = { -99., -99.};
496 Double_t bCov[3] = { -99., -99., -99.};
497 track->PropagateToDCA(fAOD->GetPrimaryVertex(), fAOD->GetMagneticField(), 100., b, bCov);
498 fDCAXYQA->Fill(b[0]);
500 fDCAPrim->Fill(track->Pt(), b[0]);
504 Double_t b[2] = { -99., -99.};
505 Double_t bCov[3] = { -99., -99., -99.};
506 track->PropagateToDCA(fAOD->GetPrimaryVertex(), fAOD->GetMagneticField(), 100., b, bCov);
507 if((!fIsMC)&&fQA) fDCAMaterial->Fill(track->Pt(), b[0]);
508 if( (fDCAConfig[0] < -.9) && ( (TMath::Abs(b[0]) > fDCAConfig[1]) || (TMath::Abs(b[1]) > fDCAConfig[2])) ) return kFALSE;
509 if(fDCAConfig[0] > .9) {
510 if(fDCAConfig[4] < TMath::Abs(b[1])) return kFALSE;
511 Double_t denom = TMath::Power(track->Pt(), fDCAConfig[3]);
512 if( denom < 0.0000001 ) return kFALSE; // avoid division by zero
513 if( (fDCAConfig[1] + fDCAConfig[2] / denom) < TMath::Abs(b[0]) ) return kFALSE;
516 fDCAXYQA->Fill(b[0]);
518 fDCAPrim->Fill(track->Pt(), b[0]);
522 //_____________________________________________________________________________
523 Bool_t AliAnalysisTaskPhiFlow::IsKaon(AliAODTrack* track) const
525 // Kaon identification routine, based on multiple detectors and approaches
526 if(fDebug > 1) cout << " *** IsKaon() *** " << endl;
527 if(fUsePidResponse) {
528 Double_t prob[10] = {0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
529 fPIDCombined->ComputeProbabilities(track, fPIDResponse, prob);
530 if(prob[3] > fPIDConfig[6]) return kTRUE;
532 if(!PassesDCACut(track)) return kFALSE;
533 if(fQA) {fNOPID->Fill(track->P(), track->GetTPCsignal());fNOPIDTOF->Fill(track->P(), track->GetTOFsignal());}
534 if(track->Pt() < fPIDConfig[1]) {
535 if(fDebug>1) cout << " ITS received track with p_t " << track->Pt() << endl;
536 // if tpc control is disabled, pure its pid
537 if(fPIDConfig[2] < 0.) {
538 if (TMath::Abs(fPIDResponse->NumberOfSigmasITS(track, AliPID::kKaon)) < fPIDConfig[0]) return kTRUE;
541 // else, switch to ITS pid with TPC rejection of protons and pions
542 if (TMath::Abs(fPIDResponse->NumberOfSigmasTPC(track, AliPID::kProton)) < fPIDConfig[3]) return kFALSE;
543 else if (TMath::Abs(fPIDResponse->NumberOfSigmasTPC(track, AliPID::kPion)) < fPIDConfig[3]) return kFALSE;
544 else if (TMath::Abs(fPIDResponse->NumberOfSigmasITS(track, AliPID::kKaon)) < fPIDConfig[0]) {
545 if(fQA) {fPIDk->Fill(track->P(), track->GetTPCsignal()); fPIDTOF->Fill(track->P(), track->GetTOFsignal());}
550 if((track->Pt() > fPIDConfig[1]) && (track->Pt() < fPIDConfig[4])) {
551 if(fDebug>1) cout << " TPC received track with p_t " << track->Pt() << endl;
552 // if its control is disabled, pure tpc pid
553 if(fPIDConfig[5] < 0.) {
554 if (TMath::Abs(fPIDResponse->NumberOfSigmasTPC(track, AliPID::kKaon)) < fPIDConfig[3]) return kTRUE;
557 // else, switch to TPC pid with ITS rejection of protons and pions
558 if (TMath::Abs(fPIDResponse->NumberOfSigmasITS(track, AliPID::kProton)) < fPIDConfig[0]) return kFALSE;
559 else if (TMath::Abs(fPIDResponse->NumberOfSigmasITS(track, AliPID::kPion)) < fPIDConfig[0]) return kFALSE;
560 else if (TMath::Abs(fPIDResponse->NumberOfSigmasTPC(track, AliPID::kKaon)) < fPIDConfig[3]) {
561 if(fQA) {fPIDk->Fill(track->P(), track->GetTPCsignal()); fPIDTOF->Fill(track->P(), track->GetTOFsignal());}
566 if(fDebug>1) cout << " Bayesian method received track with p_t " << track->Pt() << endl;
567 // switch to bayesian PID
568 if (PassesTPCbayesianCut(track)) {
569 if(fQA) {fPIDk->Fill(track->P(), track->GetTPCsignal());fPIDTOF->Fill(track->P(), track->GetTOFsignal());}
574 //_____________________________________________________________________________
575 template <typename T> Double_t AliAnalysisTaskPhiFlow::PhiPt(const T* track1, const T* track2) const
577 // return p_t of track pair
578 TVector3 a(track1->Px(), track1->Py(), track1->Pz());
579 TVector3 b(track2->Px(), track2->Py(), track2->Pz());
583 //_____________________________________________________________________________
584 template <typename T> void AliAnalysisTaskPhiFlow::PtSelector(Int_t tracktype, const T* track1, const T* track2) const
586 // plot m_inv spectra of like- and unlike-sign kaon pairs for each pt bin
587 Double_t pt = PhiPt(track1, track2);
588 if (tracktype == 0) {
589 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++) {
590 if ((fPtBins[ptbin] <= pt) && (fPtBins[ptbin+1] > pt )) {
591 fInvMNP[ptbin]->Fill(InvariantMass(track1, track2));
592 if(fQA) fPtSpectra[ptbin]->Fill(pt);
596 if (tracktype == 1) {
597 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++) {
598 if ((fPtBins[ptbin] <= pt) && (fPtBins[ptbin+1] > pt )) {
599 fInvMPP[ptbin]->Fill(InvariantMass(track1, track2));
603 if (tracktype == 2) {
604 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++) {
605 if ((fPtBins[ptbin] <= pt) && (fPtBins[ptbin+1] > pt )) {
606 fInvMNN[ptbin]->Fill(InvariantMass(track1, track2));
611 //_____________________________________________________________________________
612 template <typename T> Bool_t AliAnalysisTaskPhiFlow::PhiTrack(T* track) const
614 // check if track meets quality cuts
615 if(!track) return kFALSE;
616 return fPOICuts->IsSelected(track);
618 //_____________________________________________________________________________
619 template <typename T> void AliAnalysisTaskPhiFlow::SetNullCuts(T* event)
622 if (fDebug > 0) cout << " *** SetNullCuts() *** " << fCutsRP << endl;
623 fCutsRP->SetEvent(event, MCEvent());
624 fNullCuts->SetParamType(AliFlowTrackCuts::kGlobal);
625 fNullCuts->SetPtRange(+1, -1); // select nothing QUICK
626 fNullCuts->SetEtaRange(+1, -1); // select nothing VZERO
627 fNullCuts->SetEvent(event, MCEvent());
629 //_____________________________________________________________________________
630 void AliAnalysisTaskPhiFlow::PrepareFlowEvent(Int_t iMulti)
632 // Prepare flow events
633 if (fDebug > 0 ) cout << " *** PrepareFlowEvent() *** " << endl;
634 fFlowEvent->ClearFast();
635 fFlowEvent->Fill(fCutsRP, fNullCuts);
636 fFlowEvent->SetReferenceMultiplicity(iMulti);
637 fFlowEvent->DefineDeadZone(0, 0, 0, 0);
639 //_____________________________________________________________________________
640 void AliAnalysisTaskPhiFlow::VZEROSubEventAnalysis()
642 // vzero event plane analysis using three subevents
643 if(fDebug > 0) cout << " ** VZEROSubEventAnalysis() *** " << endl;
644 if(!AliAnalysisTaskVnV0::IsPsiComputed()) { // AliAnalysisTaskVnV0 must be added to analysis que before this task !!!
645 if(fDebug > 0 ) cout << "Fatal error: unable to retrieve VZERO task output !!! Exiting ..." << endl;
649 Float_t abcPsi2[] = {AliAnalysisTaskVnV0::GetPsi2V0A(), AliAnalysisTaskVnV0::GetPsi2TPC(), AliAnalysisTaskVnV0::GetPsi2V0C()};
650 for(Int_t i(0); i < 3; i++) if(abcPsi2[i] == 0) {
651 if(fDebug > 0) cout << " Warning: I've encountered 0 in one of the symmetry panes (TPC, VZERO) - skipping event !" << endl;
654 // save info for resolution calculations
655 Float_t qaqb = TMath::Cos(2.*(abcPsi2[0]-abcPsi2[1])); // vzeroa - tpc
656 Float_t qaqc = TMath::Cos(2.*(abcPsi2[0]-abcPsi2[2])); // vzeroa - vzeroc
657 Float_t qbqc = TMath::Cos(2.*(abcPsi2[1]-abcPsi2[2])); // tpc - vzeroc
658 fSubEventDPhiv2->Fill(0.5, qaqb);
659 fSubEventDPhiv2->Fill(1.5, qaqc);
660 fSubEventDPhiv2->Fill(2.5, qbqc);
662 Float_t _dphi[30][fNPtBins][2]; //minv, pt, v0a-c
663 Int_t occurence[30][fNPtBins]; //minv, pt
664 for(Int_t mb(0); mb < 31; mb++) minv[mb] = 0.99 + mb * 0.0034;
665 for(Int_t i(0); i < 30; i++) for (Int_t j(0); j < fNPtBins; j++) for(Int_t k(0); k < 2; k ++) {
667 if(k==0) occurence[i][j] = 0;
669 for(Int_t iCand(0); iCand < fCandidates->GetEntriesFast(); iCand++) { // loop over unlike sign kaon pairs
670 AliFlowTrackSimple *track = dynamic_cast<AliFlowTrackSimple*>(fCandidates->At(iCand));
672 if(fDebug > 1) cout << " --> dynamic_cast returned null-pointer, skipping candidate <-- " << endl;
675 for(Int_t mb(0); mb < 30; mb++) { // loop over massbands
676 if(track->Mass() <= minv[mb] || track->Mass() > minv[mb+1]) continue;
677 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++) { // loop over pt bins
678 if(track->Pt() <= fPtBins[ptbin] || track->Pt() > fPtBins[ptbin+1]) continue;
679 _dphi[mb][ptbin][0]+=TMath::Cos(2.*(track->Phi() - abcPsi2[0]));
680 _dphi[mb][ptbin][1]+=TMath::Cos(2.*(track->Phi() - abcPsi2[2]));
681 occurence[mb][ptbin]+=1;
684 for(Int_t mb(0); mb < 30; mb++) // write vn values to tprofiles
685 for(Int_t ptbin(0); ptbin < fNPtBins; ptbin++) {
686 if(occurence[mb][ptbin]==0) continue;
687 fV0Data[ptbin][0]->Fill(mb*0.0034+0.99+0.0017, _dphi[mb][ptbin][0]/(Float_t)occurence[mb][ptbin]);
688 fV0Data[ptbin][1]->Fill(mb*0.0034+0.99+0.0017, _dphi[mb][ptbin][1]/(Float_t)occurence[mb][ptbin]);
692 //_____________________________________________________________________________
693 void AliAnalysisTaskPhiFlow::UserExec(Option_t *)
695 // UserExec: called for each event. Commented where necessary
696 if(fDebug > 0 ) cout << " *** UserExec() *** " << endl;
697 TObjArray* MixingCandidates = 0x0; // init null pointer for event mixing
699 MixingCandidates = new TObjArray();
700 MixingCandidates->SetOwner(kTRUE); // mixing candidates has ownership of objects in array
703 if(fDebug > 0 ) cout << " Could not get PID response " << endl;
706 fAOD = dynamic_cast<AliAODEvent*>(InputEvent()); // check for aod data type
708 if (!EventCut(fAOD)) return; // check for event cuts
709 InitializeBayesianPID(fAOD); // init event objects
711 PrepareFlowEvent(fAOD->GetNumberOfTracks());
712 fCandidates->SetLast(-1);
713 if(fIsMC) IsMC(); // launch mc stuff
714 if(fQA) fEventStats->Fill(0);
715 Int_t unTracks = fAOD->GetNumberOfTracks();
716 AliAODTrack* un[unTracks];
717 AliAODTrack* up[unTracks];
720 for (Int_t iTracks = 0; iTracks < unTracks; iTracks++) { // select analysis candidates
721 AliAODTrack* track = fAOD->GetTrack(iTracks);
722 if (!PhiTrack(track)) continue;
724 if(track->Charge() > 0) {fEventStats->Fill(1); fPtP->Fill(track->Pt());}
725 if(track->Charge() < 0) {fEventStats->Fill(2); fPtN->Fill(track->Pt());}
728 if(fEventMixing) MixingCandidates->Add(new AliPhiMesonHelperTrack(track->Eta(), track->Phi(), track->P(),
729 track->Px(), track->Py(), track->Pz(),
730 track->Pt(), track->Charge()));
731 if (track->Charge() > 0) {
734 if(fQA) {fEventStats->Fill(3);fPtKP->Fill(track->Pt());}
736 else if (track->Charge() < 0) {
739 if(fQA) {fEventStats->Fill(4); fPtKN->Fill(track->Pt());}
743 for (Int_t pTracks = 0; pTracks < unp ; pTracks++) { // perform analysis
744 for (Int_t nTracks = 0; nTracks < unn ; nTracks++) {
745 // if (fApplyDeltaDipCut && (!CheckDeltaDipAngle(up[pTracks], un[nTracks]))) continue;
746 if (fCandidateEtaPtCut && (!CheckCandidateEtaPtCut(up[pTracks], un[nTracks]))) continue;
747 PtSelector(0, up[pTracks], un[nTracks]);
748 Double_t pt = PhiPt(up[pTracks], un[nTracks]);
749 Double_t mass = InvariantMass(up[pTracks], un[nTracks]);
750 TVector3 a(up[pTracks]->Px(), up[pTracks]->Py(), up[pTracks]->Pz());
751 TVector3 b(un[nTracks]->Px(), un[nTracks]->Py(), up[pTracks]->Pz());
753 Double_t phi = c.Phi();
754 Double_t eta = c.Eta();
756 nIDs[0] = up[pTracks]->GetID();
757 nIDs[1] = un[nTracks]->GetID();
758 MakeTrack(mass, pt, phi, eta, 2, nIDs);
761 if(fV0) VZEROSubEventAnalysis();
762 if (fDebug > 0) printf("I received %d candidates\n", fCandidates->GetEntriesFast()); // insert candidates into flow events
763 for (int iCand = 0; iCand != fCandidates->GetEntriesFast(); ++iCand) {
764 AliFlowCandidateTrack *cand = dynamic_cast<AliFlowCandidateTrack*>(fCandidates->At(iCand));
766 if (fDebug > 1) printf(" --> Checking at candidate %d with %d daughters: mass %f\n", iCand, cand->GetNDaughters(), cand->Mass());
767 for (int iDau = 0; iDau != cand->GetNDaughters(); ++iDau) {
768 if (fDebug>1) printf(" *** Daughter %d with fID %d ***", iDau, cand->GetIDDaughter(iDau));
769 for (int iRPs = 0; iRPs != fFlowEvent->NumberOfTracks(); ++iRPs) {
770 AliFlowTrack *iRP = dynamic_cast<AliFlowTrack*>(fFlowEvent->GetTrack(iRPs));
772 if (!iRP->InRPSelection()) continue;
773 if (cand->GetIDDaughter(iDau) == iRP->GetID()) {
774 if (fDebug > 1) printf(" was in RP set");
775 iRP->SetForRPSelection(kFALSE);
776 fFlowEvent->SetNumberOfRPs(fFlowEvent->GetNumberOfRPs() - 1);
779 if (fDebug > 1) printf("\n");
781 cand->SetForPOISelection(kTRUE);
782 fFlowEvent->InsertTrack(((AliFlowTrack*) cand));
784 if (fDebug > 0) printf("TPCevent %d\n", fFlowEvent->NumberOfTracks());
785 if(!fEventMixing) { // combinatorial background
786 for (Int_t pTracks = 0; pTracks < unp ; pTracks++) {
787 for (Int_t nTracks = pTracks + 1; nTracks < unp ; nTracks++) {
788 // if (fApplyDeltaDipCut && (!CheckDeltaDipAngle(up[pTracks], up[nTracks]))) continue;
789 if (fCandidateEtaPtCut && (!CheckCandidateEtaPtCut(up[pTracks], up[nTracks]))) continue;
790 PtSelector(1, up[pTracks], up[nTracks]);
793 for (Int_t nTracks = 0; nTracks < unn ; nTracks++) {
794 for (Int_t pTracks = nTracks + 1; pTracks < unn ; pTracks++) {
795 // if (fApplyDeltaDipCut && (!CheckDeltaDipAngle(un[nTracks], un[pTracks]))) continue;
796 if (fCandidateEtaPtCut && (!CheckCandidateEtaPtCut(un[nTracks], un[pTracks]))) continue;
797 PtSelector(2, un[nTracks], un[pTracks]);
801 if(fEventMixing) ReconstructionWithEventMixing(MixingCandidates);
802 PostData(1, fOutputList);
803 PostData(2, fFlowEvent);
806 //_____________________________________________________________________________
807 void AliAnalysisTaskPhiFlow::Exec(Option_t* c)
809 // skip the event selection for SE task (e.g. for MC productions)
810 if(fSkipEventSelection) AliAnalysisTaskPhiFlow::UserExec(c);
811 // exec of task se will do event selection and call UserExec
812 else AliAnalysisTaskSE::Exec(c);
814 //_____________________________________________________________________________
815 void AliAnalysisTaskPhiFlow::ReconstructionWithEventMixing(TObjArray* MixingCandidates) const
817 // perform phi reconstruction with event mixing
818 if(fDebug > 0) cout << " *** ReconstructionWithEventMixing() *** " << endl;
819 AliEventPool* pool = fPoolManager->GetEventPool(fCentrality, fVertex);
820 if(!pool) AliFatal(Form("No pool found for centrality = %f, zVtx = %f", fCentrality, fVertex));
821 if(pool->IsReady() || pool->NTracksInPool() > fMixingParameters[1] / 10 || pool->GetCurrentNEvents() >= fMixingParameters[2]) {
822 Int_t nEvents = pool->GetCurrentNEvents();
823 if(fDebug > 0) cout << " --> " << nEvents << " events in mixing buffer ... " << endl;
824 for (Int_t iEvent(0); iEvent < nEvents; iEvent++) {
825 TObjArray* mixed_candidates = pool->GetEvent(iEvent);
826 if(!mixed_candidates) continue; // this should NEVER happen
827 Int_t bufferTracks = mixed_candidates->GetEntriesFast(); // buffered candidates
828 Int_t candidates = MixingCandidates->GetEntriesFast(); // mixing candidates
829 if(fDebug > 0) cout << Form(" - mixing %d tracks with %d buffered tracks from event %d ... ", candidates, bufferTracks, iEvent) << endl;
830 AliPhiMesonHelperTrack* buffer_un[bufferTracks]; // set values for buffered candidates
831 AliPhiMesonHelperTrack* buffer_up[bufferTracks];
834 AliPhiMesonHelperTrack* mix_un[candidates];// set values for mixing candidates
835 AliPhiMesonHelperTrack* mix_up[candidates];
838 for (Int_t iTracks = 0; iTracks < candidates; iTracks++) { // distinguish between k+ and k- for mixing candidates
839 AliPhiMesonHelperTrack* track = (AliPhiMesonHelperTrack*)MixingCandidates->At(iTracks);
841 if (track->Charge() > 0) {
842 mix_up[mix_unp] = track;
845 else if (track->Charge() < 0 ) {
846 mix_un[mix_unn] = track;
850 for (Int_t iTracks = 0; iTracks < bufferTracks; iTracks++) { // distinguish between k+ and k- for buffered candidates
851 AliPhiMesonHelperTrack* track = (AliPhiMesonHelperTrack*)mixed_candidates->At(iTracks);
853 if (track->Charge() > 0) {
854 buffer_up[buffer_unp] = track;
857 else if (track->Charge() < 0 ) {
858 buffer_un[buffer_unn] = track;
862 for (Int_t pMix = 0; pMix < mix_unp; pMix++) { // mix k+ (current event) k+ (buffer)
863 if(fDebug > 1 ) cout << Form("mixing current k+ track %d with", pMix);
864 if(!fTypeMixing) { // mix with like-sign kaons
865 for(Int_t pBuf = 0; pBuf < buffer_unp; pBuf++) {
866 if(fDebug > 1 ) cout << Form(" buffered k+ track %d", pBuf) << endl;
867 // if (fApplyDeltaDipCut && (!CheckDeltaDipAngle(mix_up[pMix], buffer_up[pBuf]))) continue;
868 if (fCandidateMinEta && (!CheckCandidateEtaPtCut(mix_up[pMix], buffer_up[pBuf]))) continue;
869 PtSelector(1, mix_up[pMix], buffer_up[pBuf]);
872 else if(fTypeMixing) { // mix with unlike-sign kaons
873 for(Int_t nBuf = 0; nBuf < buffer_unn; nBuf++) {
874 if(fDebug > 1 ) cout << Form(" buffered k- track %d", nBuf) << endl;
875 // if (fApplyDeltaDipCut && (!CheckDeltaDipAngle(mix_up[pMix], buffer_un[nBuf]))) continue;
876 if (fCandidateMinEta && (!CheckCandidateEtaPtCut(mix_up[pMix], buffer_un[nBuf]))) continue;
877 PtSelector(2, mix_up[pMix], buffer_un[nBuf]);
881 for (Int_t nMix = 0; nMix < mix_unn; nMix++) { // mix k- (current event) k- (buffer)
882 if(fDebug > 1 ) cout << Form("mixing current k- track %d with", nMix);
883 if(!fTypeMixing) { // mix with like-sign kaons
884 for(Int_t nBuf = 0; nBuf < buffer_unn; nBuf++) {
885 if(fDebug > 1 ) cout << Form(" buffered k- track %d", nBuf) << endl;
886 // if (fApplyDeltaDipCut && (!CheckDeltaDipAngle(mix_un[nMix], buffer_un[nBuf]))) continue;
887 if (fCandidateMinEta && (!CheckCandidateEtaPtCut(mix_un[nMix], buffer_un[nBuf]))) continue;
888 PtSelector(2, mix_un[nMix], buffer_un[nBuf]);
891 else if(fTypeMixing) { // mix with unlike-sign kaons
892 for(Int_t pBuf = 0; pBuf < buffer_unp; pBuf++) {
893 if(fDebug > 1 ) cout << Form(" buffered k+ track %d", pBuf) << endl;
894 // if (fApplyDeltaDipCut && (!CheckDeltaDipAngle(mix_un[nMix], buffer_up[pBuf]))) continue;
895 if (fCandidateMinEta && (!CheckCandidateEtaPtCut(mix_un[nMix], buffer_up[pBuf]))) continue;
896 PtSelector(1, mix_un[nMix], buffer_up[pBuf]);
900 } // end of mixed events loop
901 } // end of checking to see whether pool is filled correctly
902 pool->UpdatePool(MixingCandidates); // update pool with current mixing candidates (for next event)
903 if(fDebug > 0 ) pool->PrintInfo();
905 //_____________________________________________________________________________
906 void AliAnalysisTaskPhiFlow::Terminate(Option_t *)
909 if(fDebug > 0) cout << " *** Terminate() *** " << endl;
911 //______________________________________________________________________________
912 void AliAnalysisTaskPhiFlow::MakeTrack(Double_t mass, Double_t pt, Double_t phi, Double_t eta, Int_t nDau, Int_t iID[]) const
914 // Construct Flow Candidate Track from two selected candidates
915 if(fDebug > 1 ) cout << " *** MakeTrack() *** " << endl;
916 Bool_t overwrite = kTRUE;
917 AliFlowCandidateTrack *sTrack = static_cast<AliFlowCandidateTrack*>(fCandidates->At(fCandidates->GetLast() + 1));
919 sTrack = new AliFlowCandidateTrack(); //deleted by fCandidates
922 else sTrack->ClearMe();
923 sTrack->SetMass(mass);
927 for (Int_t iDau = 0; iDau != nDau; ++iDau) sTrack->AddDaughter(iID[iDau]);
928 sTrack->SetForPOISelection(kTRUE);
929 sTrack->SetForRPSelection(kFALSE);
930 if (overwrite) fCandidates->SetLast(fCandidates->GetLast() + 1);
931 else fCandidates->AddLast(sTrack);
934 //_____________________________________________________________________________
935 void AliAnalysisTaskPhiFlow::IsMC()
937 // Fill QA histos for MC analysis
938 TClonesArray *arrayMC = 0;
939 if(fDebug > 0) cout << " -> Switching to MC mode <- " << endl;
940 // fill array with mc tracks
941 arrayMC = (TClonesArray*) fAOD->GetList()->FindObject(AliAODMCParticle::StdBranchName());
942 if (!arrayMC) AliFatal("Error: MC particles branch not found!\n");
943 for (Int_t iTracks = 0; iTracks < fAOD->GetNumberOfTracks(); iTracks++) {
944 AliAODTrack* track = fAOD->GetTrack(iTracks);
945 if(!PhiTrack(track) || !IsKaon(track)) { // check for kaons
946 if(fDebug>1) cout << " Rejected track" << endl;
949 if (fDebug>1) cout << " Received MC kaon " << endl;
950 Double_t b[2] = { -99., -99.};
951 Double_t bCov[3] = { -99., -99., -99.};
952 track->PropagateToDCA(fAOD->GetPrimaryVertex(), fAOD->GetMagneticField(), 100., b, bCov);
953 // find corresponding mc particle
954 AliAODMCParticle *partMC = (AliAODMCParticle*) arrayMC->At(TMath::Abs(track->GetLabel()));
956 if(fDebug > 1) cout << "Cannot get MC particle" << endl;
959 // Check if it is primary, secondary from material or secondary from weak decay
960 Bool_t isPrimary = partMC->IsPhysicalPrimary();
961 Bool_t isSecondaryMaterial = kFALSE;
962 Bool_t isSecondaryWeak = kFALSE;
964 Int_t mfl = -999, codemoth = -999;
965 Int_t indexMoth = partMC->GetMother();
966 if (indexMoth >= 0) { // is not fake
967 AliAODMCParticle* moth = (AliAODMCParticle*) arrayMC->At(indexMoth);
968 codemoth = TMath::Abs(moth->GetPdgCode());
969 mfl = Int_t(codemoth / TMath::Power(10, Int_t(TMath::Log10(codemoth))));
971 if (mfl == 3) isSecondaryWeak = kTRUE;
972 else isSecondaryMaterial = kTRUE;
975 fDCAPrim->Fill(track->Pt(), b[0]);
976 fDCAXYQA->Fill(b[0]);
979 if (isSecondaryWeak) fDCASecondaryWeak->Fill(track->Pt(), b[0]);
980 if (isSecondaryMaterial) fDCAMaterial->Fill(track->Pt(), b[0]);
983 //_____________________________________________________________________________