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 *
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 **************************************************************************/
17 // General task to match two sets of jets
19 // This task takes two TClonesArray's as input:
20 // [1] fSourceJets - e.g. pythia jets
21 // [2] fTargetJets - e.g. a samle containing pythia jets embedded in a pbpb event
22 // the task will try to match jets from the source array to the target array, and
23 // save the found TARGET jets in a new array 'fMatchedJets'
24 // the purpose of this task is twofold
25 // [1] matching for embedding studies
26 // [2] matching to create a detector response function
28 // matching is done in three steps
29 // [1] geometric matching, where jets are matched by R = sqrt(dphi*dphi-deta*deta) or directly via dphi and deta
30 // [2] optional injection / bijection check
31 // in this check, it is made sure that fSourceJets -> fMatchedJets is either an injective non-surjective
32 // or bijective map, depending on the matching resolution which is chosen for step [1]
33 // so that each source jet has a unique target and vice-versa.
34 // if R (or dphi, deta) are proportional to, or larger than, the jet radius, matching tends to be
35 // bijective (each source has a target), if R is chosen to be very small, source jets might be lost
36 // as no target can be found.
37 // the mapping is done in such a way that each target is matched to its closest source and each source
38 // is mapped to its closest target
39 // [3] constituent matching
40 // - how many constituents of the source jet are present in the matched jet?
41 // a cut on the constituent fraction can be performed (not recommended)
42 // - how much of the original pt is recovered in the matched jet?
43 // a cut on the fraction of recovered / original pt can be performed (recommended)
46 // to obtain a detector respose function, supply
47 // [1] fSourceJets - particle level jets
48 // [2] fTargetJets - detector level jets
50 // Author: Redmer Alexander Bertens, Utrecht Univeristy, Utrecht, Netherlands
51 // rbertens@cern.ch, rbertens@nikhef.nl, r.a.bertens@uu.nl
54 #include <TClonesArray.h>
69 #include <AliAnalysisTask.h>
70 #include <AliAnalysisManager.h>
72 #include <AliVEvent.h>
73 #include <AliVParticle.h>
74 // emcal jet framework includes
75 #include <AliEmcalJet.h>
76 #include <AliAnalysisTaskJetMatching.h>
77 #include <AliLocalRhoParameter.h>
79 class AliAnalysisTaskJetMatching;
82 ClassImp(AliAnalysisTaskJetMatching)
84 AliAnalysisTaskJetMatching::AliAnalysisTaskJetMatching() : AliAnalysisTaskEmcalJet("AliAnalysisTaskJetMatching", kTRUE),
85 fDebug(0), fSourceJets(0), fSourceJetsName(0), fTargetJets(0), fTargetJetsName(0), fMatchedJets(0), fMatchedJetsName(GetName()), fSourceRho(0), fSourceRhoName(0), fTargetRho(0), fTargetRhoName(0), fUseScaledRho(0), fSourceRadius(0.3), fTargetRadius(0.3), fMatchingScheme(kGeoEtaPhi), fUseEmcalBaseJetCuts(kFALSE), fSourceBKG(kNoSourceBKG), fTargetBKG(kNoTargetBKG), fOutputList(0), fHistUnsortedCorrelation(0), fHistMatchedCorrelation(0), fHistSourceJetPt(0), fHistMatchedSourceJetPt(0), fHistTargetJetPt(0), fHistMatchedJetPt(0), fHistSourceMatchedJetPt(0), fHistDetectorResponseProb(0), fHistNoConstSourceJet(0), fHistNoConstTargetJet(0), fHistNoConstMatchJet(0), fProfFracPtMatched(0), fProfFracPtJets(0), fProfFracNoMatched(0), fProfFracNoJets(0), fHistDiJet(0), fHistDiJetLeadingJet(0), fHistDiJetDPhi(0), fHistDiJetDPt(0), fHistAnalysisSummary(0), fProfQAMatched(0), fProfQA(0), fNoMatchedJets(200), fMatchEta(.3), fMatchPhi(.3), fMatchR(.08), fDoDetectorResponse(kFALSE), fMatchConstituents(kTRUE), fMinFracRecoveredConstituents(.5), fMinFracRecoveredConstituentPt(0.5), fGetBijection(kTRUE), fh1Trials(0x0), fh1AvgTrials(0x0), fh1Xsec(0x0), fAvgTrials(0) {
86 // default constructor
87 ClearMatchedJetsCache();
89 //_____________________________________________________________________________
90 AliAnalysisTaskJetMatching::AliAnalysisTaskJetMatching(const char* name) : AliAnalysisTaskEmcalJet(name, kTRUE),
91 fDebug(0), fSourceJets(0), fSourceJetsName(0), fTargetJets(0), fTargetJetsName(0), fMatchedJets(0), fMatchedJetsName(GetName()), fSourceRho(0), fSourceRhoName(0), fTargetRho(0), fTargetRhoName(0), fUseScaledRho(0), fSourceRadius(0.3), fTargetRadius(0.3), fMatchingScheme(kGeoEtaPhi), fUseEmcalBaseJetCuts(kFALSE), fSourceBKG(kNoSourceBKG), fTargetBKG(kNoTargetBKG), fOutputList(0), fHistUnsortedCorrelation(0), fHistMatchedCorrelation(0), fHistSourceJetPt(0), fHistMatchedSourceJetPt(0), fHistTargetJetPt(0), fHistMatchedJetPt(0), fHistSourceMatchedJetPt(0), fHistDetectorResponseProb(0), fHistNoConstSourceJet(0), fHistNoConstTargetJet(0), fHistNoConstMatchJet(0), fProfFracPtMatched(0), fProfFracPtJets(0), fProfFracNoMatched(0), fProfFracNoJets(0), fHistDiJet(0), fHistDiJetLeadingJet(0), fHistDiJetDPhi(0), fHistDiJetDPt(0), fHistAnalysisSummary(0), fProfQAMatched(0), fProfQA(0), fNoMatchedJets(200), fMatchEta(.3), fMatchPhi(.3), fMatchR(.08), fDoDetectorResponse(kFALSE), fMatchConstituents(kTRUE), fMinFracRecoveredConstituents(0.5), fMinFracRecoveredConstituentPt(0.5), fGetBijection(kTRUE), fh1Trials(0x0), fh1AvgTrials(0x0), fh1Xsec(0x0), fAvgTrials(0) {
93 ClearMatchedJetsCache();
94 DefineInput(0, TChain::Class());
95 DefineOutput(1, TList::Class());
97 //_____________________________________________________________________________
98 AliAnalysisTaskJetMatching::~AliAnalysisTaskJetMatching()
101 if(fOutputList) delete fOutputList;
103 //_____________________________________________________________________________
104 void AliAnalysisTaskJetMatching::ExecOnce()
106 // initialize the anaysis
107 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
108 // get the stand alone jets from the input event
109 fSourceJets = dynamic_cast<TClonesArray*>(InputEvent()->FindListObject(fSourceJetsName.Data()));
110 if(!fSourceJets) AliFatal(Form("%s: Container with name %s not found. Aborting", GetName(), fSourceJetsName.Data()));
111 fTargetJets = dynamic_cast<TClonesArray*>(InputEvent()->FindListObject(fTargetJetsName.Data()));
112 if(!fTargetJets) AliFatal(Form("%s: Container with name %s not found. Aborting", GetName(), fSourceJetsName.Data()));
113 // append the list of matched jets to the event
114 fMatchedJets->Delete();
115 if (!(InputEvent()->FindListObject(fMatchedJetsName))) InputEvent()->AddObject(fMatchedJets);
116 else AliFatal(Form("%s: Object with name %s already in event! Aborting", GetName(), fMatchedJetsName.Data()));
117 FillAnalysisSummaryHistogram();
118 switch (fSourceBKG) {
119 case kSourceLocalRho : {
120 fSourceRho = dynamic_cast<AliLocalRhoParameter*>(InputEvent()->FindListObject(fSourceRhoName));
121 if(!fSourceRho) AliFatal(Form("%s: Object with name %s requested but not found! Aborting", GetName(), fSourceRhoName.Data()));
125 switch (fTargetBKG) {
126 case kTargetLocalRho : {
127 fTargetRho = dynamic_cast<AliLocalRhoParameter*>(InputEvent()->FindListObject(fTargetRhoName));
128 if(!fTargetRho) AliFatal(Form("%s: Object with name %s requested but not found! Aborting", GetName(), fTargetRhoName.Data()));
132 AliAnalysisTaskEmcalJet::ExecOnce(); // init base class
133 if(fDoDetectorResponse) fMatchConstituents = kFALSE;
135 //_____________________________________________________________________________
136 void AliAnalysisTaskJetMatching::UserCreateOutputObjects()
138 // create output objects
139 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
140 // add the matched jets array to the event
141 fMatchedJets = new TClonesArray("AliEmcalJet");
142 fMatchedJets->SetName(fMatchedJetsName);
143 fOutputList = new TList();
144 fOutputList->SetOwner(kTRUE);
145 // add analysis histograms
146 fHistUnsortedCorrelation = BookTH1F("fHistUnsortedCorrelation", "#Delta #varphi unsorted", 50, 0, TMath::Pi());
147 fHistMatchedCorrelation = BookTH1F("fHistMatchedCorrelation", "#Delta #varphi matched", 50, 0, TMath::Pi());
148 fHistSourceJetPt = (fDoDetectorResponse) ? BookTH1F("fHistParticleLevelJetPt", "p_{t}^{gen} [GeV/c]", 150, -50, 250) : BookTH1F("fHistSourceJetPt", "p_{t} [GeV/c]", 150, -50, 250);
149 fHistMatchedSourceJetPt = (fDoDetectorResponse) ? BookTH1F("fHistMatchedParticleLevelJetPt", "p_{t}^{gen} [GeV/c]", 150, -50, 250) : BookTH1F("fHistMatchedSourceJetPt", "p_{t} [GeV/c]", 150, -50, 250);
150 fHistTargetJetPt = BookTH1F("fHistTargetJetPt", "p_{t} [GeV/c]", 150, -50, 250);
151 fHistMatchedJetPt = (fDoDetectorResponse) ? BookTH1F("fHistDetectorLevelJet", "p_{t}^{rec}", 150, -50, 250) : BookTH1F("fHistMatchedJetPt", "p_{t} [GeV/c]", 150, -50, 250);
152 fHistSourceMatchedJetPt = (fDoDetectorResponse) ? BookTH2F("fHistDetectorResponse", "particle level jet p_{t}^{gen} [GeV/c]", "detector level jet p_{t}^{rec} [GeV/c]", 300, -50, 250, 300, -50, 250) : BookTH2F("fHistSourceMatchedJetPt", "source jet p_{t} [GeV/c]", "matched jet p_{t} [GeV/c]", 300, -50, 250, 300, -50, 250);
153 if(fDoDetectorResponse) {
154 fHistDetectorResponseProb = BookTH2F("fHistDetectorResponseProb", "(p_{t}^{det} - p_{t}^{part})/p_{t}^{part}", "p_{t}^{part}", 100, -1.5, 1., 20, 0, 200);
155 fh1Xsec = new TProfile("fh1Xsec","xsec from pyxsec.root",1,0,1);
156 fh1Xsec->GetXaxis()->SetBinLabel(1,"<#sigma>");
157 fOutputList->Add(fh1Xsec);
158 fh1Trials = new TH1F("fh1Trials","trials root file",1,0,1);
159 fh1Trials->GetXaxis()->SetBinLabel(1,"#sum{ntrials}");
160 fOutputList->Add(fh1Trials);
161 fh1AvgTrials = new TH1F("fh1AvgTrials","avg trials root file",1,0,1);
162 fh1AvgTrials->GetXaxis()->SetBinLabel(1,"#sum{avg ntrials}");
163 fOutputList->Add(fh1AvgTrials);
165 fHistNoConstSourceJet = BookTH1F("fHistNoConstSourceJet", "number of constituents source jets", 50, 0, 50);
166 fHistNoConstTargetJet = BookTH1F("fHistNoConstTargetJet", "number of constituents target jets", 50, 0, 50);
167 fHistNoConstMatchJet = BookTH1F("fHistNoConstMatchJet", "number of constituents matched jets", 50, 0, 50);
168 if(!fDoDetectorResponse) { // these observables cannot be measured in current detector response mode
169 fProfFracPtMatched = new TProfile("fProfFracPtMatched", "recovered target p_{T} / source p_{T}", 15, -50, 250);
170 fOutputList->Add(fProfFracPtMatched);
171 fProfFracNoMatched = new TProfile("fProfFracNoMatched", "recovered target constituents / source constituents", 15, -50, 250);
172 fOutputList->Add(fProfFracNoMatched);
174 // the analysis summary histo which stores all the analysis flags is always written to file
175 fHistAnalysisSummary = BookTH1F("fHistAnalysisSummary", "flag", 51, -0.5, 15.5);
176 fProfQAMatched = new TProfile("fProfQAMatched", "fProfQAMatched", 3, 0, 3);
177 fProfQAMatched->GetXaxis()->SetBinLabel(1, "<#delta p_{t} >");
178 fProfQAMatched->GetXaxis()->SetBinLabel(2, "<#delta #eta>");
179 fProfQAMatched->GetXaxis()->SetBinLabel(3, "<#delta #varphi>");
180 fOutputList->Add(fProfQAMatched);
181 fProfQA = new TProfile("fProfQA", "fProfQA", 3, 0, 3);
182 fProfQA->GetXaxis()->SetBinLabel(1, "<#delta p_{t} >");
183 fProfQA->GetXaxis()->SetBinLabel(2, "<#delta #eta>");
184 fProfQA->GetXaxis()->SetBinLabel(3, "<#delta #varphi>");
185 fOutputList->Add(fProfQA);
186 fProfFracPtJets = new TProfile("fProfFracPtJets", "source p_{T} / target p_{T}", 15, -50, 250);
187 fOutputList->Add(fProfFracPtJets);
188 fProfFracNoJets = new TProfile("fProfFracNoJets", "source constituents / target constituents", 15, -50, 250);
189 fOutputList->Add(fProfFracNoJets);
190 switch (fMatchingScheme) {
192 fHistDiJet = BookTH3F("fHistDiJet", "matched di-jet #varphi", "matched di-jet #eta", "leading jet p_{T} (GeV/c)", 100, 0., TMath::TwoPi(), 100, -5., 5., 100, 0, 200);
193 fHistDiJetLeadingJet = BookTH3F("fHistDiJetLeadingJet", "leading jet #varphi", "leadingd jet #eta", "leading jet p_{T} (GeV/c)", 100, 0., TMath::TwoPi(), 100, -5., 5., 100, 0, 200);
194 fHistDiJetDPhi = BookTH2F("fHistDiJetDPhi", "leading jet #varphi - (matched jet #varphi - #pi)", "leading jet p_{T} (GeV/c)", 100, -1.*TMath::Pi(), TMath::Pi(), 100, 0, 200);
195 fHistDiJetDPt = BookTH2F("fHistDiJetDPt", "leading jet p_{T} - sub leading jet p_{T} (GeV/c)", "leading jet p_{T} (GeV/c)", 100, -25, 25, 100, 0, 200);
200 PostData(1, fOutputList);
202 //_____________________________________________________________________________
203 TH1F* AliAnalysisTaskJetMatching::BookTH1F(const char* name, const char* x, Int_t bins, Double_t min, Double_t max, Bool_t append)
205 // book a TH1F and connect it to the output container
206 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
207 if(append && !fOutputList) return 0x0;
209 title += Form(";%s;[counts]", x);
210 TH1F* histogram = new TH1F(name, title.Data(), bins, min, max);
212 if(append) fOutputList->Add(histogram);
215 //_____________________________________________________________________________
216 TH2F* AliAnalysisTaskJetMatching::BookTH2F(const char* name, const char* x, const char*y, Int_t binsx, Double_t minx, Double_t maxx, Int_t binsy, Double_t miny, Double_t maxy, Bool_t append)
218 // book a TH2F and connect it to the output container
219 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
220 if(append && !fOutputList) return 0x0;
222 title += Form(";%s;%s", x, y);
223 TH2F* histogram = new TH2F(name, title.Data(), binsx, minx, maxx, binsy, miny, maxy);
225 if(append) fOutputList->Add(histogram);
228 //_____________________________________________________________________________
229 TH3F* AliAnalysisTaskJetMatching::BookTH3F(const char* name, const char* x, const char* y, const char* z, Int_t binsx, Double_t minx, Double_t maxx, Int_t binsy, Double_t miny, Double_t maxy, Int_t binsz, Double_t minz, Double_t maxz, Bool_t append)
231 // book a TH2F and connect it to the output container
232 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
233 if(append && !fOutputList) return 0x0;
235 title += Form(";%s;%s;%s", x, y, z);
236 TH3F* histogram = new TH3F(name, title.Data(), binsx, minx, maxx, binsy, miny, maxy, binsz, minz, maxz);
238 if(append) fOutputList->Add(histogram);
241 //_____________________________________________________________________________
242 Bool_t AliAnalysisTaskJetMatching::Notify()
244 // for each file get the number of trials and pythia cross section
245 // see $ALICE_ROOT/PWGJE/AliAnalysisTaskJetProperties.cxx
246 // $ALICE_ROOT/PWG/Tools/AliAnalysisHelperJetTasks.cxx
247 // this function is implenented here temporarily to avoid introducing a dependency
248 // later on this could just be a call to a static helper function
249 if(!fDoDetectorResponse) return kTRUE;
250 Float_t xsection(0), ftrials(1);
251 fAvgTrials = ftrials;
252 TTree *tree = AliAnalysisManager::GetAnalysisManager()->GetTree();
254 TFile *curfile = tree->GetCurrentFile();
255 if (!curfile) return kFALSE;
256 TString file(curfile->GetName());
257 if(file.Contains("root_archive.zip#")) file.Replace(file.Index("#",1,file.Index("root_archive",12,0,TString::kExact),TString::kExact)+1,file.Index(".root",5,TString::kExact)-file.Index("root_archive",12,0,TString::kExact),"");
258 else file.ReplaceAll(gSystem->BaseName(file.Data()),"");
259 TFile *fxsec = TFile::Open(Form("%s%s",file.Data(),"pyxsec.root"));
261 fxsec = TFile::Open(Form("%s%s",file.Data(),"pyxsec_hists.root"));
263 TKey* key = (TKey*)fxsec->GetListOfKeys()->At(0);
265 TList *list = dynamic_cast<TList*>(key->ReadObj());
267 xsection = ((TProfile*)list->FindObject("h1Xsec"))->GetBinContent(1);
268 ftrials = ((TH1F*)list->FindObject("h1Trials"))->GetBinContent(1);
274 TTree *xtree = (TTree*)fxsec->Get("Xsection");
277 Double_t _xsection = 0;
278 xtree->SetBranchAddress("xsection",&_xsection);
279 xtree->SetBranchAddress("ntrials",&_ftrials);
282 xsection = _xsection;
286 fh1Xsec->Fill("<#sigma>",xsection);
287 Float_t nEntries = (Float_t)tree->GetTree()->GetEntries();
288 if(ftrials >= nEntries && nEntries > 0.) fAvgTrials = ftrials/nEntries;
289 fh1Trials->Fill("#sum{ntrials}",ftrials);
293 //_____________________________________________________________________________
294 Bool_t AliAnalysisTaskJetMatching::Run()
296 // execute once for each event
297 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
298 if(!(InputEvent() && fSourceJets && fTargetJets && IsEventSelected())) return kFALSE;
299 if(fh1AvgTrials) fh1AvgTrials->Fill("#sum{avg ntrials}", fAvgTrials);
300 // step one: do geometric matching
301 switch (fMatchingScheme) {
302 // FIXME having separate dedicated functions is not necessary and historical
303 // cluttered code - should be cleaned up and merged into one
305 DoGeometricMatchingEtaPhi();
306 // break if no jet was matched
307 if(!fMatchedJetContainer[1][0]) return kTRUE;
310 DoGeometricMatchingR();
311 // break if no jet was matched
312 if(!fMatchedJetContainer[1][0]) return kTRUE;
319 // optional step two: get a bijection (avoid duplicate matches)
320 if(fGetBijection) GetBijection();
321 // optional step three: match constituents within matched jets
322 if(fMatchConstituents) DoConstituentMatching();
323 // stream data to output
325 FillMatchedJetHistograms();
326 if(fDebug > 0) PrintInfo();
327 PostData(1, fOutputList);
330 //_____________________________________________________________________________
331 void AliAnalysisTaskJetMatching::DoGeometricMatchingEtaPhi()
333 // do geometric matching based on eta phi distance between jet centers
334 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
335 fNoMatchedJets = 0; // reset the matched jet counter
336 Int_t iSource(fSourceJets->GetEntriesFast()), iTarget(fTargetJets->GetEntriesFast());
337 for(Int_t i(0); i < iSource; i++) {
338 AliEmcalJet* sourceJet(static_cast<AliEmcalJet*>(fSourceJets->At(i)));
339 if(!PassesCuts(sourceJet, 0)) continue;
340 for(Int_t j(0); j < iTarget; j++) {
341 AliEmcalJet* targetJet(static_cast<AliEmcalJet*>(fTargetJets->At(j)));
342 if(!PassesCuts(targetJet, 1)) continue;
343 if (fUseEmcalBaseJetCuts && !AcceptJet(targetJet, 1)) continue;
344 if((TMath::Abs(sourceJet->Eta() - targetJet->Eta()) < fMatchEta )) {
345 Double_t sourcePhi(sourceJet->Phi()), targetPhi(targetJet->Phi());
346 if(TMath::Abs(sourcePhi-targetPhi) > TMath::Abs(sourcePhi-targetPhi+TMath::TwoPi())) sourcePhi+=TMath::TwoPi();
347 if(TMath::Abs(sourcePhi-targetPhi) > TMath::Abs(sourcePhi-targetPhi-TMath::TwoPi())) sourcePhi-=TMath::TwoPi();
348 if(TMath::Abs(sourcePhi-targetPhi) < fMatchPhi) { // accept the jets as matching
349 Bool_t isBestMatch(kTRUE);
350 if(fGetBijection) { // match has been found, for bijection only store it if there's no better match
351 if(fDebug > 0) printf(" > Entering first bijection test \n");
352 for(Int_t k(i); k < iSource; k++) {
353 AliEmcalJet* candidateSourceJet(static_cast<AliEmcalJet*>(fSourceJets->At(k)));
354 if(PassesCuts(candidateSourceJet, 0)) continue;
355 if(fDebug > 0) printf("source distance %.2f \t candidate distance %.2f \n", GetR(sourceJet, targetJet),GetR(candidateSourceJet, targetJet));
356 if(GetR(sourceJet, targetJet) > GetR(candidateSourceJet, targetJet)) {
357 isBestMatch = kFALSE;
361 if(fDebug > 0) (isBestMatch) ? printf(" kept source \n ") : printf(" we can do better (rejected source) \n");
364 fMatchedJetContainer[fNoMatchedJets][0] = sourceJet;
365 fMatchedJetContainer[fNoMatchedJets][1] = targetJet;
368 if(fNoMatchedJets > 199) { // maximum to keep the cache at reasonable size
369 AliError(Form("%s: Found too many matched jets (> 100). Adjust matching criteria !", GetName()));
377 //_____________________________________________________________________________
378 void AliAnalysisTaskJetMatching::DoGeometricMatchingR()
380 // do geometric matching based on shortest path between jet centers
381 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
382 fNoMatchedJets = 0; // reset the matched jet counter
383 Int_t iSource(fSourceJets->GetEntriesFast()), iTarget(fTargetJets->GetEntriesFast());
384 for(Int_t i(0); i < iSource; i++) {
385 AliEmcalJet* sourceJet(static_cast<AliEmcalJet*>(fSourceJets->At(i)));
386 if(!PassesCuts(sourceJet, 0)) continue;
387 for(Int_t j(0); j < iTarget; j++) {
388 AliEmcalJet* targetJet(static_cast<AliEmcalJet*>(fTargetJets->At(j)));
389 if(!PassesCuts(targetJet, 1)) continue;
390 else if (fUseEmcalBaseJetCuts && !AcceptJet(targetJet, 1)) continue;
391 if(GetR(sourceJet, targetJet) <= fMatchR) {
392 Bool_t isBestMatch(kTRUE);
393 if(fGetBijection) { // match has been found, for bijection only store it if there's no better match
394 if(fDebug > 0) printf(" > Entering first bijection test \n");
395 for(Int_t k(i); k < iSource; k++) {
396 AliEmcalJet* candidateSourceJet(static_cast<AliEmcalJet*>(fSourceJets->At(k)));
397 if(!PassesCuts(candidateSourceJet, 0)) continue;
398 if(fDebug > 0) printf("source distance %.2f \t candidate distance %.2f \n", GetR(sourceJet, targetJet),GetR(candidateSourceJet, targetJet));
399 if(GetR(sourceJet, targetJet) > GetR(candidateSourceJet, targetJet)) {
400 isBestMatch = kFALSE;
404 if(fDebug > 0) (isBestMatch) ? printf(" kept source \n ") : printf(" we can do better (rejected source) \n");
407 fMatchedJetContainer[fNoMatchedJets][0] = sourceJet;
408 fMatchedJetContainer[fNoMatchedJets][1] = targetJet;
411 if(fNoMatchedJets > 99) {
412 AliError(Form("%s: Found too many matched jets (> 100). Adjust matching criteria !", GetName()));
419 //_____________________________________________________________________________
420 void AliAnalysisTaskJetMatching::DoDiJetMatching()
422 // match dijets. this is in a sense a 'special' mode of the task as both jet supplied jet arrays
423 // (target and source) are the same jet collection, matching will be performed on distribution in
425 // no ouptut array is produced, dedicated dijet histo's are filled in this function instead
426 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
427 // get the leading jet in a given acceptance (TPC is default)
428 Int_t leadingJetIndex(-1), subLeadingJetIndex(-1);
429 // retrieve the leading jet, leadingJetIndex points to the leading jet
430 AliEmcalJet* leadingJet(GetLeadingJet(fSourceJets, leadingJetIndex));
431 if(!leadingJet) return;
432 // fill phi and eta of leading jet (should always be in selected acceptance)
433 fHistDiJetLeadingJet->Fill(leadingJet->Phi(), leadingJet->Eta(), leadingJet->Pt());
434 Double_t sourcePhi(leadingJet->Phi()), targetPhi(-1);
435 // get the sub-leading jet - faster when leading jet is also provided
436 AliEmcalJet* subLeadingJet(GetSubLeadingJet(fSourceJets, leadingJetIndex, subLeadingJetIndex));
437 if(!subLeadingJet) return;
438 else { // check if the sub-leading jet is actually the away-side jet
439 targetPhi = subLeadingJet->Phi() + TMath::Pi();
440 // rotate jets to common phase
441 if(TMath::Abs(sourcePhi) > TMath::Abs(sourcePhi+TMath::TwoPi())) sourcePhi+=TMath::TwoPi();
442 if(TMath::Abs(sourcePhi) > TMath::Abs(sourcePhi-TMath::TwoPi())) sourcePhi-=TMath::TwoPi();
443 if(TMath::Abs(targetPhi) > TMath::Abs(targetPhi+TMath::TwoPi())) targetPhi+=TMath::TwoPi();
444 if(TMath::Abs(targetPhi) > TMath::Abs(targetPhi-TMath::TwoPi())) targetPhi-=TMath::TwoPi();
445 if(TMath::Abs(sourcePhi-targetPhi) < fMatchPhi) {
446 fHistDiJet->Fill(subLeadingJet->Phi(), subLeadingJet->Eta(), leadingJet->Pt());
447 fHistDiJetDPhi->Fill(sourcePhi-targetPhi, leadingJet->Pt());
448 fHistDiJetDPt->Fill(leadingJet->Pt() - subLeadingJet->Pt(), leadingJet->Pt());
452 //_____________________________________________________________________________
453 void AliAnalysisTaskJetMatching::DoConstituentMatching()
455 // match constituents within matched jets
456 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
458 AliFatal(Form("%s Fatal error! To do deep matching, supply jet constituents ! \n", GetName()));
459 return; // coverity ...
461 for(Int_t i(0); i < fNoMatchedJets; i++) {
462 AliEmcalJet* sourceJet = fMatchedJetContainer[i][0];
463 AliEmcalJet* targetJet = fMatchedJetContainer[i][1];
464 if(sourceJet && targetJet) { // duplicate check: slot migth be NULL
465 Double_t targetPt(0);
466 Int_t iSJ(sourceJet->GetNumberOfTracks());
467 Int_t iTJ(targetJet->GetNumberOfTracks());
468 Int_t overlap(0), alreadyFound(0);
469 for(Int_t j(0); j < iSJ; j++) {
471 Int_t idSource((Int_t)sourceJet->TrackAt(j));
472 for(Int_t k(0); k < iTJ; k++) { // compare all target tracks to the source track
473 if(idSource == targetJet->TrackAt(k) && alreadyFound == 0) {
475 alreadyFound++; // avoid possible duplicate matching
476 AliVParticle* vp(static_cast<AliVParticle*>(targetJet->TrackAt(k, fTracks)));
477 if(vp) targetPt += vp->Pt();
482 if((float)overlap/(float)iSJ < fMinFracRecoveredConstituents || targetPt/sourceJet->Pt() < fMinFracRecoveredConstituentPt) {
483 if(fDebug > 0) printf(" \n > Purging jet, recovered constituents ratio %i / %i = %.2f < or pt ratio %.2f / %.2f = %.2f < %.2f",
484 overlap, iSJ, (float)overlap/(float)iSJ, targetPt, sourceJet->Pt(), targetPt/sourceJet->Pt(), fMinFracRecoveredConstituentPt);
485 fMatchedJetContainer[i][0] = 0x0;
486 fMatchedJetContainer[i][1] = 0x0;
489 if(sourceJet->Pt() > 0) {
490 Double_t sourceRho(0), targetRho(0);
491 if(fSourceRho) sourceRho = fSourceRho->GetLocalVal(sourceJet->Phi(), fSourceRadius)*sourceJet->Area();
492 if(fTargetRho) targetRho = fTargetRho->GetLocalVal(targetJet->Phi(), fTargetRadius)*targetJet->Area();
493 fProfFracPtMatched->Fill(sourceJet->Pt()-sourceRho, (targetPt-targetRho) / (sourceJet->Pt()-sourceRho));
494 fProfFracPtJets->Fill(sourceJet->Pt()-sourceRho, (targetJet->Pt()-targetRho) / (sourceJet->Pt()-sourceRho));
495 fProfFracNoMatched->Fill(sourceJet->Pt()-sourceRho, (double)overlap / (double)sourceJet->GetNumberOfTracks());
496 fProfFracNoJets->Fill(sourceJet->Pt()-sourceRho, (double)targetJet->GetNumberOfTracks() / (double)sourceJet->GetNumberOfTracks());
499 printf("\n > Jet A: %i const\t", iSJ);
500 printf(" > Jet B %i const\t", iTJ);
501 printf(" -> OVERLAP: %i tracks <- \n", overlap);
506 //_____________________________________________________________________________
507 void AliAnalysisTaskJetMatching::GetBijection()
509 // bijection of source and matched jets, based on closest distance between jets
510 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
511 for(Int_t i(0); i < fNoMatchedJets; i++) {
512 for(Int_t j(i+1); j < fNoMatchedJets; j++) {
513 if(fMatchedJetContainer[i][0] == fMatchedJetContainer[j][0]) {
514 // found source with two targets, now see which target is closer to the source
515 if(!(fMatchedJetContainer[i][0] && fMatchedJetContainer[i][1] && fMatchedJetContainer[j][0] && fMatchedJetContainer[j][1] )) continue;
516 Double_t rA(GetR(fMatchedJetContainer[i][0], fMatchedJetContainer[i][1])); // distance between connection A = i
517 Double_t rB(GetR(fMatchedJetContainer[j][0], fMatchedJetContainer[j][1])); // distance between connection B = j
518 if (rB > rA) { // jet two is far away, clear it from both target and source list
519 fMatchedJetContainer[j][0] = 0x0;
520 fMatchedJetContainer[j][1] = 0x0;
521 } else { // jet one is far away, clear it from both target and source list
522 fMatchedJetContainer[i][0] = fMatchedJetContainer[j][0]; // switch to avoid breaking loop
523 fMatchedJetContainer[i][1] = fMatchedJetContainer[j][1];
524 fMatchedJetContainer[j][0] = 0x0; // clear duplicate jet from cache
525 fMatchedJetContainer[j][1] = 0x0;
527 if(fDebug > 0) printf(" found duplicate jet, chose %.2f over %.2f \n" , (rB > rA) ? rA : rB, (rB > rA) ? rB : rA);
532 //_____________________________________________________________________________
533 void AliAnalysisTaskJetMatching::PostMatchedJets()
536 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
537 fMatchedJets->Delete(); // should be a NULL operation, but added just in case
538 for(Int_t i(0), p(0); i < fNoMatchedJets; i++) {
539 if(fMatchedJetContainer[i][1]) { // duplicate jets will have NULL value here and are skipped
540 new((*fMatchedJets)[p]) AliEmcalJet(*fMatchedJetContainer[i][1]);
545 //_____________________________________________________________________________
546 void AliAnalysisTaskJetMatching::FillAnalysisSummaryHistogram() const
548 // fill the analysis summary histrogram, saves all relevant analysis settigns
549 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
550 fHistAnalysisSummary->GetXaxis()->SetBinLabel(1, "fUseScaledRho");
551 fHistAnalysisSummary->SetBinContent(1, (int)fUseScaledRho);
552 fHistAnalysisSummary->GetXaxis()->SetBinLabel(2, "fMatchingScheme");
553 fHistAnalysisSummary->SetBinContent(2, (int)fMatchingScheme);
554 fHistAnalysisSummary->GetXaxis()->SetBinLabel(3, "fSourceBKG");
555 fHistAnalysisSummary->SetBinContent(3, (int)fSourceBKG);
556 fHistAnalysisSummary->GetXaxis()->SetBinLabel(4, "fTargetBKG");
557 fHistAnalysisSummary->SetBinContent(4, (int)fTargetBKG);
558 fHistAnalysisSummary->GetXaxis()->SetBinLabel(5, "fMatchEta");
559 fHistAnalysisSummary->SetBinContent(5, fMatchEta);
560 fHistAnalysisSummary->GetXaxis()->SetBinLabel(6, "fMatchPhi");
561 fHistAnalysisSummary->SetBinContent(6, fMatchPhi);
562 fHistAnalysisSummary->GetXaxis()->SetBinLabel(7, "fMatchR");
563 fHistAnalysisSummary->SetBinContent(7, fMatchR);
564 fHistAnalysisSummary->GetXaxis()->SetBinLabel(8, "iter");
565 fHistAnalysisSummary->SetBinContent(8, 1.);
567 //_____________________________________________________________________________
568 void AliAnalysisTaskJetMatching::FillMatchedJetHistograms()
570 // fill matched jet histograms
571 if(fDebug > 0) printf("__FILE__ = %s \n __LINE __ %i , __FUNC__ %s \n ", __FILE__, __LINE__, __func__);
572 for(Int_t i(0); i < fSourceJets->GetEntriesFast(); i++) {
573 AliEmcalJet* source = static_cast<AliEmcalJet*>(fSourceJets->At(i));
574 if(!source) continue;
575 else if(fUseEmcalBaseJetCuts && !AcceptJet(source, 0)) continue;
576 Double_t sourceRho(0), targetRho(0);
577 if(fSourceRho) sourceRho = fSourceRho->GetLocalVal(source->Phi(), fSourceRadius)*source->Area();
578 fHistSourceJetPt->Fill(source->Pt()-sourceRho);
579 fHistNoConstSourceJet->Fill(source->GetNumberOfConstituents());
580 for(Int_t j(0); j < fTargetJets->GetEntriesFast(); j++) {
581 AliEmcalJet* target = static_cast<AliEmcalJet*>(fTargetJets->At(j));
583 if(fUseEmcalBaseJetCuts && !AcceptJet(target, 1)) continue;
584 if(fTargetRho) targetRho = fTargetRho->GetLocalVal(target->Phi(), fTargetRadius)*target->Area();
585 fProfQA->Fill(0.5, TMath::Abs((source->Pt()-sourceRho)-(target->Pt()-targetRho)));
586 fProfQA->Fill(1.5, TMath::Abs(source->Eta()-target->Eta()));
587 fProfQA->Fill(2.5, TMath::Abs(source->Phi()-target->Phi()));
588 fHistUnsortedCorrelation->Fill(PhaseShift(source->Phi()-target->Phi(), 2));
590 fHistTargetJetPt->Fill(target->Pt()-targetRho);
591 fHistNoConstTargetJet->Fill(target->GetNumberOfConstituents());
596 for(Int_t i(0); i < fNoMatchedJets; i++) {
597 if(fMatchedJetContainer[i][0] && fMatchedJetContainer[i][1]) {
598 Double_t sourceRho(0), targetRho(0);
599 if(fSourceRho) sourceRho = fSourceRho->GetLocalVal(fMatchedJetContainer[i][0]->Phi(), fSourceRadius)*fMatchedJetContainer[i][0]->Area();
600 if(fTargetRho) targetRho = fTargetRho->GetLocalVal(fMatchedJetContainer[i][1]->Phi(), fTargetRadius)*fMatchedJetContainer[i][1]->Area();
601 fHistMatchedCorrelation->Fill(PhaseShift(fMatchedJetContainer[i][0]->Phi()-fMatchedJetContainer[i][1]->Phi(), 2));
602 fHistMatchedSourceJetPt->Fill(fMatchedJetContainer[i][0]->Pt()-sourceRho);
603 fHistMatchedJetPt->Fill(fMatchedJetContainer[i][1]->Pt()-targetRho);
604 fHistNoConstMatchJet->Fill(fMatchedJetContainer[i][1]->Pt()-targetRho);
605 fProfQAMatched->Fill(0.5, TMath::Abs((fMatchedJetContainer[i][0]->Pt()-sourceRho)-(fMatchedJetContainer[i][1]->Pt()-targetRho)));
606 fProfQAMatched->Fill(1.5, TMath::Abs(fMatchedJetContainer[i][0]->Eta()-fMatchedJetContainer[i][1]->Eta()));
607 fProfQAMatched->Fill(2.5, TMath::Abs(fMatchedJetContainer[i][0]->Phi()-fMatchedJetContainer[i][1]->Phi()));
609 fHistSourceMatchedJetPt->Fill(fMatchedJetContainer[i][0]->Pt()-sourceRho, fMatchedJetContainer[i][1]->Pt()-targetRho);
610 if(fDoDetectorResponse) {
611 fProfFracPtJets->Fill(fMatchedJetContainer[i][0]->Pt()-sourceRho, (fMatchedJetContainer[i][1]->Pt()-targetRho) / (fMatchedJetContainer[i][0]->Pt()-sourceRho));
612 fProfFracNoJets->Fill(fMatchedJetContainer[i][0]->Pt()-sourceRho, (double)fMatchedJetContainer[i][1]->GetNumberOfTracks() / (double)fMatchedJetContainer[i][0]->GetNumberOfTracks());
613 fHistDetectorResponseProb->Fill((fMatchedJetContainer[i][1]->Pt()-fMatchedJetContainer[i][0]->Pt())/fMatchedJetContainer[i][0]->Pt(), fMatchedJetContainer[i][0]->Pt());
618 //_____________________________________________________________________________
619 AliEmcalJet* AliAnalysisTaskJetMatching::GetLeadingJet(TClonesArray* source, Int_t &leadingJetIndex, Double_t etaMin, Double_t etaMax)
621 // return the leading jet within giiven acceptance
622 Int_t iJets(source->GetEntriesFast());
624 AliEmcalJet* leadingJet(0x0);
625 for(Int_t i(0); i < iJets; i++) {
626 AliEmcalJet* jet = static_cast<AliEmcalJet*>(source->At(i));
627 if(jet->Eta() < etaMin || jet->Eta() > etaMax) continue;
630 pt = leadingJet->Pt();
636 //_____________________________________________________________________________
637 AliEmcalJet* AliAnalysisTaskJetMatching::GetSubLeadingJet(TClonesArray* source, Int_t leadingJetIndex, Int_t &subLeadingJetIndex)
639 // return the sub-leading jet within given acceptance
640 // same as GetLeadingJet() but skips the leading jet (so returned jet is
641 // sub-leading by design)
642 // there is no eta requirement on the location of the sub-leading jet
643 Int_t iJets(source->GetEntriesFast());
644 // if the leading jet isn't given, retrieve it
645 if(leadingJetIndex < 0) GetLeadingJet(source, leadingJetIndex);
646 AliEmcalJet *leadingJet(0x0), *prevLeadingJet(static_cast<AliEmcalJet*>(source->At(leadingJetIndex)));
647 if(!prevLeadingJet) return 0x0;
648 Double_t pt(0), leadingPt(prevLeadingJet->Pt());
649 for(Int_t i(0); i < iJets; i++) {
650 if(i == leadingJetIndex) continue;
651 AliEmcalJet* jet = static_cast<AliEmcalJet*>(source->At(i));
652 // check if jet is actually sub-leading
653 if(jet->Pt() > pt && jet->Pt() <= leadingPt) {
655 pt = leadingJet->Pt();
656 subLeadingJetIndex = i;
661 //_____________________________________________________________________________
662 void AliAnalysisTaskJetMatching::PrintInfo() const
665 printf("\n > No. of source jets from %s \n \t %i \n ", fSourceJetsName.Data(), fSourceJets->GetEntriesFast());
666 printf(" > No. of target jets from %s \n \t %i \n ", fTargetJetsName.Data(), fTargetJets->GetEntriesFast());
667 printf(" > No. of matched jets from %s \n \t %i \n ", fMatchedJetsName.Data(), fMatchedJets->GetEntriesFast());
668 if(fDebug > 3) InputEvent()->GetList()->ls();
670 //_____________________________________________________________________________
671 void AliAnalysisTaskJetMatching::Terminate(Option_t *)
675 //_____________________________________________________________________________