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48d874ff | 1 | // $Id$ |
2 | ||
914d486c | 3 | #include "AliEmcalJetTask.h" |
6ea168d0 | 4 | #include <TChain.h> |
48d874ff | 5 | #include <TClonesArray.h> |
6ea168d0 | 6 | #include <TH1F.h> |
7 | #include <TH2F.h> | |
8 | #include <TList.h> | |
9 | #include <TLorentzVector.h> | |
48d874ff | 10 | #include <TParticle.h> |
48d874ff | 11 | #include "AliAnalysisManager.h" |
6ea168d0 | 12 | #include "AliCentrality.h" |
35789a2d | 13 | #include "AliVCluster.h" |
14 | #include "AliVTrack.h" | |
914d486c | 15 | #include "AliEmcalJet.h" |
48d874ff | 16 | #include "AliFJWrapper.h" |
48d874ff | 17 | |
914d486c | 18 | ClassImp(AliEmcalJetTask) |
48d874ff | 19 | |
6ea168d0 | 20 | //________________________________________________________________________ |
914d486c | 21 | AliEmcalJetTask::AliEmcalJetTask() : |
22 | AliAnalysisTaskSE("AliEmcalJetTask"), | |
6ea168d0 | 23 | fTracksName("Tracks"), |
24 | fCaloName("CaloClusters"), | |
25 | fJetsName("Jets"), | |
26 | fAlgo(1), | |
27 | fRadius(0.4), | |
28 | fType(0), | |
914d486c | 29 | fMinJetTrackPt(0.15), |
30 | fMinJetClusPt(0.15), | |
6ea168d0 | 31 | fJets(0) |
32 | { | |
33 | // Default constructor. | |
34 | ||
35 | fBranchNames="ESD:AliESDRun.,AliESDHeader.,PrimaryVertex."; | |
36 | } | |
37 | ||
48d874ff | 38 | //________________________________________________________________________ |
914d486c | 39 | AliEmcalJetTask::AliEmcalJetTask(const char *name) : |
40 | AliAnalysisTaskSE("AliEmcalJetTask"), | |
7efbea04 | 41 | fTracksName("Tracks"), |
48d874ff | 42 | fCaloName("CaloClusters"), |
7efbea04 | 43 | fJetsName("Jets"), |
48d874ff | 44 | fAlgo(1), |
45 | fRadius(0.4), | |
46 | fType(0), | |
6ea168d0 | 47 | fMinJetTrackPt(0.15), |
914d486c | 48 | fMinJetClusPt(0.15), |
7efbea04 | 49 | fJets(0) |
48d874ff | 50 | { |
51 | // Standard constructor. | |
7efbea04 | 52 | |
48d874ff | 53 | if (!name) |
54 | return; | |
7efbea04 | 55 | |
48d874ff | 56 | SetName(name); |
7efbea04 | 57 | fBranchNames="ESD:AliESDRun.,AliESDHeader.,PrimaryVertex."; |
6ea168d0 | 58 | |
27fde6c7 | 59 | //DefineInput(0,TChain::Class()); |
60 | //DefineOutput(1,TList::Class()); | |
48d874ff | 61 | } |
62 | ||
63 | //________________________________________________________________________ | |
914d486c | 64 | AliEmcalJetTask::~AliEmcalJetTask() |
48d874ff | 65 | { |
66 | // Destructor | |
67 | } | |
68 | ||
69 | //________________________________________________________________________ | |
914d486c | 70 | void AliEmcalJetTask::UserCreateOutputObjects() |
48d874ff | 71 | { |
72 | // Create user objects. | |
73 | ||
914d486c | 74 | fJets = new TClonesArray("AliEmcalJet"); |
48d874ff | 75 | fJets->SetName(fJetsName); |
48d874ff | 76 | } |
77 | ||
78 | //________________________________________________________________________ | |
914d486c | 79 | void AliEmcalJetTask::UserExec(Option_t *) |
48d874ff | 80 | { |
81 | // Main loop, called for each event. | |
7efbea04 | 82 | // Add jets to event if not yet there |
48d874ff | 83 | |
48d874ff | 84 | if (!(InputEvent()->FindListObject(fJetsName))) |
85 | InputEvent()->AddObject(fJets); | |
51914326 | 86 | else { |
87 | // IMPORTANT: if it is not an AliESDEvent, non-std TClonesArray will not be cleared automatically! | |
88 | if (!(InputEvent()->InheritsFrom("AliESDEvent"))) | |
89 | fJets->Delete(); | |
90 | } | |
48d874ff | 91 | |
92 | AliAnalysisManager *am = AliAnalysisManager::GetAnalysisManager(); | |
93 | TClonesArray *tracks = 0; | |
94 | TClonesArray *clus = 0; | |
95 | TList *l = InputEvent()->GetList(); | |
6ea168d0 | 96 | |
97 | Float_t cent=100; | |
98 | AliCentrality *centrality = dynamic_cast<AliCentrality*>(l->FindObject("Centrality")); | |
99 | if(centrality) | |
100 | cent = centrality->GetCentralityPercentile("V0M"); | |
101 | ||
48d874ff | 102 | if ((fType==0)||(fType==1)) { |
7efbea04 | 103 | if (fTracksName == "Tracks") |
48d874ff | 104 | am->LoadBranch("Tracks"); |
7efbea04 | 105 | tracks = dynamic_cast<TClonesArray*>(l->FindObject(fTracksName)); |
48d874ff | 106 | if (!tracks) { |
7efbea04 | 107 | AliError(Form("Pointer to tracks %s == 0", fTracksName.Data() )); |
48d874ff | 108 | return; |
109 | } | |
110 | } | |
111 | if ((fType==0)||(fType==2)) { | |
112 | if (fCaloName == "CaloClusters") | |
113 | am->LoadBranch("CaloClusters"); | |
114 | clus = dynamic_cast<TClonesArray*>(l->FindObject(fCaloName)); | |
115 | if (!clus) { | |
116 | AliError(Form("Pointer to clus %s == 0", fCaloName.Data() )); | |
117 | return; | |
118 | } | |
48d874ff | 119 | } |
120 | ||
6ea168d0 | 121 | FindJets(tracks, clus, fAlgo, fRadius, cent); |
48d874ff | 122 | } |
123 | ||
124 | //________________________________________________________________________ | |
914d486c | 125 | void AliEmcalJetTask::Terminate(Option_t *) |
48d874ff | 126 | { |
127 | // Called once at the end of the analysis. | |
48d874ff | 128 | } |
129 | ||
130 | //________________________________________________________________________ | |
914d486c | 131 | void AliEmcalJetTask::FindJets(TObjArray *tracks, TObjArray *clus, Int_t algo, Double_t radius, Float_t /*cent*/) |
48d874ff | 132 | { |
133 | // Find jets. | |
134 | ||
135 | TString name("kt"); | |
136 | fastjet::JetAlgorithm jalgo(fastjet::kt_algorithm); | |
137 | if (algo>=1) { | |
138 | name = "antikt"; | |
139 | jalgo = fastjet::antikt_algorithm; | |
140 | } | |
141 | ||
142 | AliFJWrapper fjw(name, name); | |
143 | fjw.SetR(radius); | |
6ea168d0 | 144 | fjw.SetAlgorithm(jalgo); |
48d874ff | 145 | fjw.SetMaxRap(0.9); |
146 | fjw.Clear(); | |
147 | ||
148 | if (tracks) { | |
149 | const Int_t Ntracks = tracks->GetEntries(); | |
150 | for (Int_t iTracks = 0; iTracks < Ntracks; ++iTracks) { | |
7efbea04 | 151 | AliVTrack *t = static_cast<AliVTrack*>(tracks->At(iTracks)); |
48d874ff | 152 | if (!t) |
153 | continue; | |
914d486c | 154 | if (t->Pt()<fMinJetTrackPt) |
155 | continue; | |
48d874ff | 156 | fjw.AddInputVector(t->Px(), t->Py(), t->Pz(), t->P(), iTracks); |
157 | } | |
158 | } | |
6ea168d0 | 159 | |
48d874ff | 160 | if (clus) { |
161 | Double_t vertex[3] = {0, 0, 0}; | |
162 | InputEvent()->GetPrimaryVertex()->GetXYZ(vertex); | |
163 | const Int_t Nclus = clus->GetEntries(); | |
914d486c | 164 | for (Int_t iClus = 0; iClus < Nclus; ++iClus) { |
7efbea04 | 165 | AliVCluster *c = dynamic_cast<AliVCluster*>(clus->At(iClus)); |
48d874ff | 166 | if (!c->IsEMCAL()) |
167 | continue; | |
168 | TLorentzVector nPart; | |
169 | c->GetMomentum(nPart, vertex); | |
170 | Double_t energy = nPart.P(); | |
914d486c | 171 | if (energy<fMinJetClusPt) |
172 | continue; | |
6ea168d0 | 173 | fjw.AddInputVector(nPart.Px(), nPart.Py(), nPart.Pz(), energy, -iClus-1); |
48d874ff | 174 | } |
175 | } | |
176 | ||
7efbea04 | 177 | // run jet finder |
48d874ff | 178 | fjw.Run(); |
6ea168d0 | 179 | |
48d874ff | 180 | std::vector<fastjet::PseudoJet> jets_incl = fjw.GetInclusiveJets(); |
181 | for(UInt_t ij=0, jetCount=0; ij<jets_incl.size(); ++ij) { | |
182 | if (jets_incl[ij].perp()<1) | |
183 | continue; | |
914d486c | 184 | AliEmcalJet *jet = new ((*fJets)[jetCount]) |
185 | AliEmcalJet(jets_incl[ij].perp(), jets_incl[ij].eta(), jets_incl[ij].phi(), jets_incl[ij].m()); | |
900f5135 | 186 | jet->SetArea(fjw.GetJetArea(ij)); |
6ea168d0 | 187 | Double_t vertex[3] = {0, 0, 0}; |
188 | InputEvent()->GetPrimaryVertex()->GetXYZ(vertex); | |
48d874ff | 189 | vector<fastjet::PseudoJet> constituents = fjw.GetJetConstituents(ij); |
6ea168d0 | 190 | Double_t neutralE = 0;Double_t maxTrack = 0;Double_t maxCluster=0; |
35789a2d | 191 | jet->SetNumberOfTracks(constituents.size()); |
192 | jet->SetNumberOfClusters(constituents.size()); | |
193 | Int_t nt = 0; | |
194 | Int_t nc = 0; | |
48d874ff | 195 | for(UInt_t ic=0; ic<constituents.size(); ++ic) { |
196 | Int_t uid = constituents[ic].user_index(); | |
6ea168d0 | 197 | if (uid>=0){ |
35789a2d | 198 | jet->AddTrackAt(uid, nt); |
6ea168d0 | 199 | AliVTrack *t = static_cast<AliVTrack*>(tracks->At(uid)); |
200 | if (t->Pt()>maxTrack) | |
201 | maxTrack=t->Pt(); | |
35789a2d | 202 | nt++; |
6ea168d0 | 203 | } else { |
35789a2d | 204 | jet->AddClusterAt(-(uid+1),nc); |
6ea168d0 | 205 | AliVCluster *c = dynamic_cast<AliVCluster*>(clus->At(-(uid+1))); |
206 | TLorentzVector nP; | |
207 | c->GetMomentum(nP, vertex); | |
208 | neutralE += nP.P(); | |
209 | if (nP.P()>maxCluster) | |
210 | maxCluster=nP.P(); | |
35789a2d | 211 | nc++; |
48d874ff | 212 | } |
213 | } | |
35789a2d | 214 | jet->SetNumberOfTracks(nt); |
215 | jet->SetNumberOfClusters(nc); | |
6ea168d0 | 216 | jet->SetMaxTrackPt(maxTrack); |
217 | jet->SetMaxClusterPt(maxCluster); | |
48d874ff | 218 | jet->SetNEF(neutralE/jet->E()); |
48d874ff | 219 | jetCount++; |
220 | } | |
221 | } |