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a23f7c97 | 1 | // AliAnalysisTaskMultPbTracks |
2 | ||
3 | // Author: Michele Floris, CERN | |
4 | // TODO: | |
5 | // - Add chi2/cluster plot for primary, secondaries and fakes | |
e0376287 | 6 | // FIXME: |
7 | // - re-implement centrality estimator to cut on tracks and multiplicity | |
a23f7c97 | 8 | |
9 | #include "AliAnalysisTaskMultPbTracks.h" | |
10 | #include "AliESDInputHandler.h" | |
11 | #include "AliAnalysisMultPbTrackHistoManager.h" | |
12 | #include "AliAnalysisManager.h" | |
13 | #include "AliESDtrackCuts.h" | |
a23f7c97 | 14 | #include "AliMCEvent.h" |
15 | #include "AliStack.h" | |
16 | #include "TH1I.h" | |
17 | #include "TH3D.h" | |
18 | #include "AliMCParticle.h" | |
19 | #include "AliGenEventHeader.h" | |
54b31d6a | 20 | #include "AliESDCentrality.h" |
a23f7c97 | 21 | |
22 | #include <iostream> | |
2bbfd8c6 | 23 | #include "AliAnalysisMultPbCentralitySelector.h" |
a23f7c97 | 24 | |
25 | using namespace std; | |
26 | ||
27 | ClassImp(AliAnalysisTaskMultPbTracks) | |
28 | ||
29 | AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks() | |
54b31d6a | 30 | : AliAnalysisTaskSE("TaskMultPbTracks"), |
2bbfd8c6 | 31 | fESD(0),fHistoManager(0),fCentrSelector(0),fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0) |
a23f7c97 | 32 | { |
33 | // constructor | |
34 | ||
35 | DefineOutput(1, AliAnalysisMultPbTrackHistoManager::Class()); | |
54b31d6a | 36 | DefineOutput(2, AliESDtrackCuts::Class()); |
2bbfd8c6 | 37 | DefineOutput(3, AliAnalysisMultPbCentralitySelector::Class()); |
a23f7c97 | 38 | |
39 | fHistoManager = new AliAnalysisMultPbTrackHistoManager("histoManager","Hitograms, Multiplicity, Track analysis"); | |
40 | if(fIsMC) fHistoManager->SetSuffix("MC"); | |
41 | ||
42 | } | |
43 | AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks(const char * name) | |
54b31d6a | 44 | : AliAnalysisTaskSE(name), |
2bbfd8c6 | 45 | fESD(0),fHistoManager(0),fCentrSelector(0),fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0) |
a23f7c97 | 46 | { |
47 | // | |
48 | // Standard constructur which should be used | |
49 | // | |
50 | ||
51 | DefineOutput(1, AliAnalysisMultPbTrackHistoManager::Class()); | |
54b31d6a | 52 | DefineOutput(2, AliESDtrackCuts::Class()); |
2bbfd8c6 | 53 | DefineOutput(3, AliAnalysisMultPbCentralitySelector::Class()); |
a23f7c97 | 54 | |
55 | fHistoManager = new AliAnalysisMultPbTrackHistoManager("histoManager","Hitograms, Multiplicity, Track analysis"); | |
56 | if(fIsMC) fHistoManager->SetSuffix("MC"); | |
57 | ||
58 | } | |
59 | ||
60 | AliAnalysisTaskMultPbTracks::AliAnalysisTaskMultPbTracks(const AliAnalysisTaskMultPbTracks& obj) : | |
2bbfd8c6 | 61 | AliAnalysisTaskSE(obj) ,fESD (0), fHistoManager(0), fCentrSelector(0), fTrackCuts(0),fTrackCutsNoDCA(0),fIsMC(0) |
a23f7c97 | 62 | { |
63 | //copy ctor | |
64 | fESD = obj.fESD ; | |
65 | fHistoManager= obj.fHistoManager; | |
a23f7c97 | 66 | fTrackCuts = obj.fTrackCuts; |
67 | fTrackCutsNoDCA = obj.fTrackCutsNoDCA; | |
2bbfd8c6 | 68 | fCentrSelector = obj.fCentrSelector; |
a23f7c97 | 69 | |
70 | } | |
71 | ||
72 | AliAnalysisTaskMultPbTracks::~AliAnalysisTaskMultPbTracks(){ | |
73 | // destructor | |
74 | ||
75 | if(!AliAnalysisManager::GetAnalysisManager()->IsProofMode()) { | |
76 | if(fHistoManager) { | |
77 | delete fHistoManager; | |
78 | fHistoManager = 0; | |
79 | } | |
80 | } | |
81 | // Histo list should not be destroyed: fListWrapper is owner! | |
82 | ||
83 | } | |
84 | void AliAnalysisTaskMultPbTracks::UserCreateOutputObjects() | |
85 | { | |
86 | // Called once | |
87 | ||
88 | // For the DCA distributions, we want to use exactly the same cuts | |
89 | // as for the other distributions, with the exception of the DCA cut | |
90 | fTrackCutsNoDCA = new AliESDtrackCuts(*fTrackCuts); // clone cuts | |
91 | // Reset all DCA cuts; FIXME: is this all? | |
92 | fTrackCutsNoDCA->SetMaxDCAToVertexXY(); | |
93 | fTrackCutsNoDCA->SetMaxDCAToVertexZ (); | |
94 | fTrackCutsNoDCA->SetMaxDCAToVertexXYPtDep(); | |
95 | fTrackCutsNoDCA->SetMaxDCAToVertexZPtDep(); | |
96 | ||
97 | } | |
98 | ||
99 | ||
100 | void AliAnalysisTaskMultPbTracks::UserExec(Option_t *) | |
101 | { | |
102 | // User code | |
103 | ||
104 | /* PostData(0) is taken care of by AliAnalysisTaskSE */ | |
105 | PostData(1,fHistoManager); | |
54b31d6a | 106 | PostData(2,fTrackCuts); |
2bbfd8c6 | 107 | PostData(3,fCentrSelector); |
a23f7c97 | 108 | |
54b31d6a | 109 | // Cache histogram pointers |
e0376287 | 110 | static TH3D * hTracks [AliAnalysisMultPbTrackHistoManager::kNHistos]; |
111 | static TH1D * hDCA [AliAnalysisMultPbTrackHistoManager::kNHistos]; | |
112 | static TH1D * hNTracks [AliAnalysisMultPbTrackHistoManager::kNHistos]; | |
a23f7c97 | 113 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoGen ); |
114 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRec ); | |
115 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim ); | |
116 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecFake] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecFake ); | |
117 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat ); | |
118 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak] = fHistoManager->GetHistoPtEtaVz(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak); | |
119 | ||
120 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoGen] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoGen ); | |
121 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRec] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRec ); | |
122 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim ); | |
123 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecFake] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecFake ); | |
124 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat ); | |
125 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak] = fHistoManager->GetHistoDCA(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak); | |
126 | ||
2bbfd8c6 | 127 | hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen] = fHistoManager->GetHistoMult(AliAnalysisMultPbTrackHistoManager::kHistoGen ); |
128 | hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec] = fHistoManager->GetHistoMult(AliAnalysisMultPbTrackHistoManager::kHistoRec ); | |
a23f7c97 | 129 | |
130 | fESD = dynamic_cast<AliESDEvent*>(fInputEvent); | |
131 | if (strcmp(fESD->ClassName(),"AliESDEvent")) { | |
132 | AliFatal("Not processing ESDs"); | |
133 | } | |
134 | ||
135 | // FIXME: use physics selection here to keep track of events lost? | |
136 | fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatAll); | |
137 | ||
54b31d6a | 138 | // Centrality selection |
2bbfd8c6 | 139 | Bool_t isCentralitySelected = fCentrSelector->IsCentralityBinSelected(fESD,fTrackCuts); |
140 | if(!isCentralitySelected) return; | |
141 | ||
142 | // AliESDCentrality *centrality = fESD->GetCentrality(); | |
143 | // if(!centrality) { | |
144 | // AliFatal("Centrality object not available"); | |
145 | // } | |
146 | // else { | |
147 | // Int_t centrBin = centrality->GetCentralityClass5(fCentralityEstimator.Data()) ; | |
54b31d6a | 148 | |
2bbfd8c6 | 149 | // if (centrBin != fCentrBin && fCentrBin != -1) return; |
150 | // } | |
a23f7c97 | 151 | |
152 | fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatCentr); | |
153 | ||
154 | if (fIsMC) { | |
155 | ||
156 | ||
157 | if (!fMCEvent) { | |
158 | AliError("No MC info found"); | |
159 | } else { | |
160 | ||
e0376287 | 161 | //loop on the MC event, only over primaries, which are always |
162 | // the first in stack. | |
163 | Int_t nMCTracks = fMCEvent->GetNumberOfPrimaries(); | |
164 | Int_t nPhysicalPrimaries = 0; | |
165 | for (Int_t ipart=0; ipart<nMCTracks; ipart++) { | |
a23f7c97 | 166 | |
167 | AliMCParticle *mcPart = (AliMCParticle*)fMCEvent->GetTrack(ipart); | |
168 | ||
169 | // We don't care about neutrals and non-physical primaries | |
170 | if(mcPart->Charge() == 0) continue; | |
171 | ||
54b31d6a | 172 | //check if current particle is a physical primary |
e0376287 | 173 | if(!IsPhysicalPrimaryAndTransportBit(ipart)) continue; |
54b31d6a | 174 | |
e0376287 | 175 | nPhysicalPrimaries++; |
176 | // Fill species histo | |
177 | fHistoManager->GetHistoSpecies(AliAnalysisMultPbTrackHistoManager::kHistoGen)->Fill(mcPart->Particle()->GetUniqueID()); | |
178 | ||
179 | ||
a23f7c97 | 180 | // Get MC vertex |
181 | //FIXME: which vertex do I take for MC? | |
182 | TArrayF vertex; | |
183 | fMCEvent->GenEventHeader()->PrimaryVertex(vertex); | |
184 | Float_t zv = vertex[2]; | |
185 | // Float_t zv = vtxESD->GetZ(); | |
186 | // Fill generated histo | |
187 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]->Fill(mcPart->Pt(),mcPart->Eta(),zv); | |
188 | ||
189 | } | |
e0376287 | 190 | hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoGen]->Fill(nPhysicalPrimaries); |
191 | ||
a23f7c97 | 192 | } |
193 | } | |
194 | ||
e0376287 | 195 | |
a23f7c97 | 196 | // FIXME: shall I take the primary vertex? |
197 | const AliESDVertex* vtxESD = fESD->GetPrimaryVertex(); | |
198 | if(!vtxESD) return; | |
199 | fHistoManager->GetHistoStats()->Fill(AliAnalysisMultPbTrackHistoManager::kStatVtx); | |
200 | ||
201 | ||
202 | // loop on tracks | |
203 | Int_t ntracks = fESD->GetNumberOfTracks(); | |
2bbfd8c6 | 204 | Int_t acceptedTracks = 0; |
a23f7c97 | 205 | |
206 | for (Int_t itrack = 0; itrack<ntracks; itrack++) { | |
207 | AliESDtrack * esdTrack = fESD->GetTrack(itrack); | |
208 | ||
209 | // Fill DCA distibutions, without the DCA cut, Fill the other stuff, with all cuts! | |
210 | Bool_t accepted = fTrackCuts->AcceptTrack(esdTrack); | |
211 | Bool_t acceptedNoDCA = fTrackCutsNoDCA->AcceptTrack(esdTrack); | |
212 | ||
2bbfd8c6 | 213 | if(accepted) acceptedTracks++; |
214 | ||
a23f7c97 | 215 | // Compute weighted offset |
216 | // TODO: other choiches for the DCA? | |
217 | Double_t b = fESD->GetMagneticField(); | |
218 | Double_t dca[2]; | |
219 | Double_t cov[3]; | |
220 | Double_t weightedDCA = 10; | |
221 | ||
222 | ||
223 | ||
224 | if (esdTrack->PropagateToDCA(vtxESD, b,3., dca, cov)) { | |
225 | Double_t det = cov[0]*cov[2]-cov[1]*cov[1]; | |
226 | if (det<=0) { | |
227 | AliError("DCA Covariance matrix is not positive definite!"); | |
228 | } | |
229 | else { | |
230 | weightedDCA = (dca[0]*dca[0]*cov[2]+dca[1]*dca[1]*cov[0]-2*dca[0]*dca[1]*cov[1])/det; | |
231 | weightedDCA = weightedDCA>0 ? TMath::Sqrt(weightedDCA) : 10; | |
232 | } | |
233 | // printf("dR:%e dZ%e sigR2:%e sigRZ:%e sigZ2:%e\n",dca[0],dca[1],cov[0],cov[1],cov[2]); | |
234 | } | |
235 | ||
236 | ||
237 | ||
238 | ||
239 | // Alternative: p*DCA | |
240 | // Float_t xz[2]; | |
241 | // esdTrack->GetDZ(vtxESD->GetX(),vtxESD->GetY(),vtxESD->GetZ(), fESD->GetMagneticField(), xz); | |
242 | // Float_t dca = xz[0]*esdTrack->P(); | |
243 | ||
244 | // for each track | |
245 | if(accepted) | |
246 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ()); | |
247 | if(acceptedNoDCA) | |
248 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRec]->Fill(weightedDCA); | |
249 | ||
250 | // Fill separately primaries and secondaries | |
251 | // FIXME: fakes? Is this the correct way to account for them? | |
252 | // Get label and corresponding mcPart; | |
253 | if (fIsMC) { | |
254 | // Int_t label = TMath::Abs(esdTrack->GetLabel()); // no fakes!!! | |
255 | Int_t label = esdTrack->GetLabel(); // | |
e0376287 | 256 | AliMCParticle *mcPart = label < 0 ? 0 : (AliMCParticle*)fMCEvent->GetTrack(label); |
a23f7c97 | 257 | if (!mcPart) { |
258 | if(accepted) | |
259 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ()); | |
260 | if(acceptedNoDCA) | |
261 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecFake]->Fill(weightedDCA); | |
262 | } | |
263 | else { | |
e0376287 | 264 | if(IsPhysicalPrimaryAndTransportBit(label)) { |
265 | // Fill species histo | |
266 | fHistoManager->GetHistoSpecies(AliAnalysisMultPbTrackHistoManager::kHistoRecPrim)->Fill(mcPart->Particle()->GetUniqueID()); | |
a23f7c97 | 267 | if(accepted) |
268 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ()); | |
269 | if(acceptedNoDCA) | |
270 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecPrim]->Fill(weightedDCA); | |
271 | } | |
272 | else { | |
273 | Int_t mfl=0; | |
274 | Int_t indexMoth=mcPart->Particle()->GetFirstMother(); | |
275 | if(indexMoth>=0){ | |
276 | TParticle* moth = fMCEvent->Stack()->Particle(indexMoth); | |
277 | Float_t codemoth = TMath::Abs(moth->GetPdgCode()); | |
278 | mfl = Int_t (codemoth/ TMath::Power(10, Int_t(TMath::Log10(codemoth)))); | |
279 | } | |
280 | if(mfl==3){ // strangeness | |
e0376287 | 281 | fHistoManager->GetHistoSpecies(AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak)->Fill(mcPart->Particle()->GetUniqueID()); |
a23f7c97 | 282 | if(accepted) |
283 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ()); | |
284 | if(acceptedNoDCA) | |
285 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecWeak]->Fill(weightedDCA); | |
286 | }else{ // material | |
e0376287 | 287 | fHistoManager->GetHistoSpecies(AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat)->Fill(mcPart->Particle()->GetUniqueID()); |
a23f7c97 | 288 | if(accepted) |
289 | hTracks[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]->Fill(esdTrack->Pt(),esdTrack->Eta(),vtxESD->GetZ()); | |
290 | if(acceptedNoDCA) | |
291 | hDCA[AliAnalysisMultPbTrackHistoManager::kHistoRecSecMat]->Fill(weightedDCA); | |
292 | ||
293 | } | |
294 | ||
295 | ||
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | ||
301 | } | |
2bbfd8c6 | 302 | // cout << acceptedTracks << endl; |
303 | ||
304 | hNTracks[AliAnalysisMultPbTrackHistoManager::kHistoRec] ->Fill(acceptedTracks); | |
a23f7c97 | 305 | |
306 | ||
307 | } | |
308 | ||
309 | void AliAnalysisTaskMultPbTracks::Terminate(Option_t *){ | |
310 | // terminate | |
311 | ||
312 | } | |
313 | ||
314 | ||
e0376287 | 315 | Bool_t AliAnalysisTaskMultPbTracks::IsPhysicalPrimaryAndTransportBit(Int_t ipart) { |
316 | ||
317 | Bool_t physprim=fMCEvent->IsPhysicalPrimary(ipart); | |
318 | if (!physprim) return kFALSE; | |
319 | Bool_t transported = ((AliMCParticle*)fMCEvent->GetTrack(ipart))->Particle()->TestBit(kTransportBit); | |
320 | if(!transported) return kFALSE; | |
321 | ||
322 | return kTRUE; | |
323 | ||
324 | } |