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1 | //_________________________________________________________________________ | |
2 | // Utility Class for transverse energy studies | |
3 | // Base class for ESD analysis | |
4 | // - reconstruction output | |
5 | // implementation file | |
6 | // | |
7 | //*-- Authors: Oystein Djuvsland (Bergen), David Silvermyr (ORNL) | |
8 | //_________________________________________________________________________ | |
9 | ||
10 | #include "AliAnalysisEtReconstructed.h" | |
11 | #include "AliAnalysisEtCuts.h" | |
12 | #include "AliESDtrack.h" | |
13 | #include "AliEMCALTrack.h" | |
14 | #include "AliESDCaloCluster.h" | |
15 | #include "TVector3.h" | |
16 | #include "TGeoGlobalMagField.h" | |
17 | #include "AliMagF.h" | |
18 | #include "AliVEvent.h" | |
19 | #include "AliESDEvent.h" | |
20 | #include "AliESDtrackCuts.h" | |
21 | #include "AliVParticle.h" | |
22 | #include "TDatabasePDG.h" | |
23 | #include "TList.h" | |
24 | #include "AliESDpid.h" | |
25 | #include <iostream> | |
26 | #include "TH2F.h" | |
27 | ||
28 | AliAnalysisEtReconstructed::AliAnalysisEtReconstructed() : | |
29 | AliAnalysisEt() | |
30 | ,fTrackDistanceCut(0) | |
31 | ,fPidCut(0) | |
32 | ,fClusterType(0) | |
33 | ,fHistChargedPionEnergyDeposit(0) | |
34 | ,fHistProtonEnergyDeposit(0) | |
35 | ,fHistAntiProtonEnergyDeposit(0) | |
36 | ,fHistChargedKaonEnergyDeposit(0) | |
37 | ,fHistMuonEnergyDeposit(0) | |
38 | { | |
39 | ||
40 | } | |
41 | ||
42 | AliAnalysisEtReconstructed::~AliAnalysisEtReconstructed() | |
43 | { | |
44 | } | |
45 | ||
46 | Int_t AliAnalysisEtReconstructed::AnalyseEvent(AliVEvent* ev) | |
47 | { // analyse ESD event | |
48 | ResetEventValues(); | |
49 | AliESDEvent *event = dynamic_cast<AliESDEvent*>(ev); | |
50 | ||
51 | Double_t protonMass = fPdgDB->GetParticle("proton")->Mass(); | |
52 | ||
53 | AliESDEvent *realEvent = dynamic_cast<AliESDEvent*>(ev); | |
54 | //for PID | |
55 | AliESDpid *pID = new AliESDpid(); | |
56 | pID->MakePID(realEvent); | |
57 | TObjArray* list = fEsdtrackCutsTPC->GetAcceptedTracks(realEvent); | |
58 | Int_t nGoodTracks = list->GetEntries(); | |
59 | for (Int_t iTrack = 0; iTrack < nGoodTracks; iTrack++) | |
60 | { | |
61 | AliESDtrack *track = dynamic_cast<AliESDtrack*> (list->At(iTrack)); | |
62 | if (!track) | |
63 | { | |
64 | Printf("ERROR: Could not get track %d", iTrack); | |
65 | continue; | |
66 | } | |
67 | ||
68 | fMultiplicity++; | |
69 | ||
70 | ||
71 | Float_t nSigmaPion,nSigmaProton,nSigmaKaon,nSigmaElectron; | |
72 | nSigmaPion = TMath::Abs(pID->NumberOfSigmasTPC(track,AliPID::kPion)); | |
73 | nSigmaProton = TMath::Abs(pID->NumberOfSigmasTPC(track,AliPID::kProton)); | |
74 | nSigmaKaon = TMath::Abs(pID->NumberOfSigmasTPC(track,AliPID::kKaon)); | |
75 | nSigmaElectron = TMath::Abs(pID->NumberOfSigmasTPC(track,AliPID::kElectron)); | |
76 | bool isPion = (nSigmaPion<3.0 && nSigmaProton>2.0 && nSigmaKaon>2.0); | |
77 | bool isElectron = (nSigmaElectron<2.0 && nSigmaPion>4.0 && nSigmaProton>3.0 && nSigmaKaon>3.0); | |
78 | bool isKaon = (nSigmaPion>3.0 && nSigmaProton>2.0 && nSigmaKaon<2.0); | |
79 | bool isProton = (nSigmaPion>3.0 && nSigmaProton<2.0 && nSigmaKaon>2.0); | |
80 | ||
81 | ||
82 | Int_t nItsClusters = dynamic_cast<AliESDtrack*>(track)->GetNcls(0); | |
83 | Int_t nTPCClusters = dynamic_cast<AliESDtrack*>(track)->GetNcls(1); | |
84 | ||
85 | Float_t massPart = 0; | |
86 | ||
87 | const Double_t *pidWeights = track->PID(); | |
88 | Int_t maxpid = -1; | |
89 | Double_t maxpidweight = 0; | |
90 | ||
91 | if (pidWeights) | |
92 | { | |
93 | for (Int_t p =0; p < AliPID::kSPECIES; p++) | |
94 | { | |
95 | if (pidWeights[p] > maxpidweight) | |
96 | { | |
97 | maxpidweight = pidWeights[p]; | |
98 | maxpid = p; | |
99 | } | |
100 | } | |
101 | if (maxpid == AliPID::kProton) | |
102 | { | |
103 | //by definition of ET | |
104 | massPart = -protonMass*track->Charge(); | |
105 | } | |
106 | ||
107 | } | |
108 | ||
109 | Double_t et = track->E() * TMath::Sin(track->Theta()) + massPart; | |
110 | // printf("Rec track: iTrack %03d eta %4.3f phi %4.3f nITSCl %d nTPCCl %d\n", iTrack, track->Eta(), track->Phi(), nItsClusters, nTPCClusters); // tmp/debug printout | |
111 | ||
112 | if (TMath::Abs(track->Eta()) < fCuts->GetCommonEtaCut() && CheckGoodVertex(track) && nItsClusters > fCuts->GetReconstructedNItsClustersCut() && nTPCClusters > fCuts->GetReconstructedNTpcClustersCut() ) | |
113 | { | |
114 | fTotChargedEt += et; | |
115 | fChargedMultiplicity++; | |
116 | if (maxpid != -1) | |
117 | { | |
118 | if (maxpid == AliPID::kPion) | |
119 | { | |
120 | fProtonEt += et; | |
121 | } | |
122 | if (maxpid == AliPID::kKaon) | |
123 | { | |
124 | fChargedKaonEt += et; | |
125 | } | |
126 | if (maxpid == AliPID::kMuon) | |
127 | { | |
128 | fMuonEt += et; | |
129 | } | |
130 | if (maxpid == AliPID::kElectron) | |
131 | { | |
132 | fElectronEt += et; | |
133 | } | |
134 | } | |
135 | ||
136 | if (TMath::Abs(track->Eta()) < fEtaCutAcc && track->Phi() < fPhiCutAccMax && track->Phi() > fPhiCutAccMin) | |
137 | { | |
138 | fTotChargedEtAcc += track->E()*TMath::Sin(track->Theta()) + massPart; | |
139 | if (maxpid != -1) | |
140 | { | |
141 | if (maxpid == AliPID::kPion) | |
142 | { | |
143 | fProtonEtAcc += et; | |
144 | } | |
145 | if (maxpid == AliPID::kKaon) | |
146 | { | |
147 | fChargedKaonEtAcc += et; | |
148 | } | |
149 | if (maxpid == AliPID::kMuon) | |
150 | { | |
151 | fMuonEtAcc += et; | |
152 | } | |
153 | if (maxpid == AliPID::kElectron) | |
154 | { | |
155 | fElectronEtAcc += et; | |
156 | } | |
157 | } | |
158 | ||
159 | } | |
160 | } | |
161 | ||
162 | if (TrackHitsCalorimeter(track, event->GetMagneticField())) | |
163 | { | |
164 | Double_t phi = track->Phi(); | |
165 | Double_t pt = track->Pt(); | |
166 | // printf("Rec track hit: iTrack %03d phi %4.3f pt %4.3f\n", iTrack, phi, pt); // tmp/debug printout | |
167 | if (track->Charge() > 0) fHistPhivsPtPos->Fill(phi, pt); | |
168 | else fHistPhivsPtNeg->Fill(phi, pt); | |
169 | } | |
170 | } | |
171 | ||
172 | for (Int_t iCluster = 0; iCluster < event->GetNumberOfCaloClusters(); iCluster++) | |
173 | { | |
174 | AliESDCaloCluster* cluster = event->GetCaloCluster(iCluster); | |
175 | if (!cluster) | |
176 | { | |
177 | Printf("ERROR: Could not get cluster %d", iCluster); | |
178 | continue; | |
179 | } | |
180 | ||
181 | if (cluster->GetType() != fClusterType) continue; | |
182 | //if(cluster->GetTracksMatched() > 0) | |
183 | //printf("Rec Cluster: iCluster %03d E %4.3f type %d NCells %d, nmatched: %d, distance to closest: %f\n", iCluster, cluster->E(), (int)(cluster->GetType()), cluster->GetNCells(), cluster->GetNTracksMatched(), cluster->GetEmcCpvDistance()); // tmp/debug printout | |
184 | ||
185 | ||
186 | if (cluster->E() < fClusterEnergyCut) continue; | |
187 | Float_t pos[3]; | |
188 | TVector3 cp(pos); | |
189 | cluster->GetPosition(pos); | |
190 | ||
191 | Double_t distance = cluster->GetEmcCpvDistance(); | |
192 | Int_t trackMatchedIndex = cluster->GetTrackMatchedIndex(); | |
193 | if ( cluster->IsEMCAL() ) { | |
194 | distance = CalcTrackClusterDistance(pos, &trackMatchedIndex, event); | |
195 | } | |
196 | ||
197 | fHistTMDeltaR->Fill(distance); | |
198 | if (distance < fTrackDistanceCut) | |
199 | { | |
200 | if (cluster->GetNTracksMatched() == 1 && trackMatchedIndex>0) | |
201 | { | |
202 | AliVTrack *track = event->GetTrack(trackMatchedIndex); | |
203 | const Double_t *pidWeights = track->PID(); | |
204 | ||
205 | Double_t maxpidweight = 0; | |
206 | Int_t maxpid = 0; | |
207 | ||
208 | if (pidWeights) | |
209 | { | |
210 | for (Int_t p =0; p < AliPID::kSPECIES; p++) | |
211 | { | |
212 | if (pidWeights[p] > maxpidweight) | |
213 | { | |
214 | maxpidweight = pidWeights[p]; | |
215 | maxpid = p; | |
216 | } | |
217 | } | |
218 | if(maxpidweight > fPidCut) | |
219 | { | |
220 | if(maxpid == AliPID::kProton) | |
221 | { | |
222 | if(track->Charge() == 1) | |
223 | { | |
224 | fHistProtonEnergyDeposit->Fill(cluster->E(), track->E()); | |
225 | } | |
226 | else if(track->Charge() == -1) | |
227 | { | |
228 | fHistAntiProtonEnergyDeposit->Fill(cluster->E(), track->E()); | |
229 | } | |
230 | } | |
231 | else if(maxpid == AliPID::kPion) | |
232 | { | |
233 | fHistChargedPionEnergyDeposit->Fill(cluster->E(), track->E()); | |
234 | } | |
235 | else if(maxpid == AliPID::kKaon) | |
236 | { | |
237 | fHistChargedKaonEnergyDeposit->Fill(cluster->E(), track->E()); | |
238 | } | |
239 | else if(maxpid == AliPID::kMuon) | |
240 | { | |
241 | fHistMuonEnergyDeposit->Fill(cluster->E(), track->E()); | |
242 | } | |
243 | } | |
244 | } | |
245 | } | |
246 | ||
247 | continue; | |
248 | } // distance | |
249 | ||
250 | if (cluster->E() > fSingleCellEnergyCut && cluster->GetNCells() == fCuts->GetCommonSingleCell()) continue; | |
251 | ||
252 | cluster->GetPosition(pos); | |
253 | ||
254 | // TODO: replace with TVector3, too lazy now... | |
255 | ||
256 | float dist = TMath::Sqrt(pos[0]*pos[0] + pos[1]*pos[1]); | |
257 | ||
258 | float theta = TMath::ATan(pos[2]/dist)+TMath::Pi()/2; | |
259 | // float eta = TMath::Log(TMath::Abs( TMath::Tan( 0.5 * theta ) ) ); | |
260 | fTotNeutralEt += cluster->E() * TMath::Sin(theta); | |
261 | fNeutralMultiplicity++; | |
262 | ||
263 | fMultiplicity++; | |
264 | } | |
265 | ||
266 | fTotNeutralEtAcc = fTotNeutralEt; | |
267 | fTotEt = fTotChargedEt + fTotNeutralEt; | |
268 | fTotEtAcc = fTotChargedEtAcc + fTotNeutralEtAcc; | |
269 | ||
270 | // Fill the histograms... | |
271 | FillHistograms(); | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | bool AliAnalysisEtReconstructed::CheckGoodVertex(AliVParticle* track) | |
277 | { // check vertex | |
278 | ||
279 | Float_t bxy = 999.; | |
280 | Float_t bz = 999.; | |
281 | dynamic_cast<AliESDtrack*>(track)->GetImpactParametersTPC(bxy,bz); | |
282 | ||
283 | bool status = (TMath::Abs(track->Xv()) < fCuts->GetReconstructedVertexXCut()) && | |
284 | (TMath::Abs(track->Yv()) < fCuts->GetReconstructedVertexYCut()) && | |
285 | (TMath::Abs(track->Zv()) < fCuts->GetReconstructedVertexZCut()) && | |
286 | (TMath::Abs(bxy) < fCuts->GetReconstructedIPxyCut()) && | |
287 | (TMath::Abs(bz) < fCuts->GetReconstructedIPzCut()); | |
288 | ||
289 | return status; | |
290 | } | |
291 | ||
292 | void AliAnalysisEtReconstructed::Init() | |
293 | { // Init | |
294 | AliAnalysisEt::Init(); | |
295 | fPidCut = fCuts->GetReconstructedPidCut(); | |
296 | TGeoGlobalMagField::Instance()->SetField(new AliMagF("Maps","Maps", 1., 1., AliMagF::k5kG)); | |
297 | ||
298 | } | |
299 | ||
300 | bool AliAnalysisEtReconstructed::TrackHitsCalorimeter(AliVParticle* track, Double_t magField) | |
301 | { // propagate track to detector radius | |
302 | ||
303 | AliESDtrack *esdTrack = dynamic_cast<AliESDtrack*>(track); | |
304 | // Printf("Propagating track: eta: %f, phi: %f, pt: %f", esdTrack->Eta(), esdTrack->Phi(), esdTrack->Pt()); | |
305 | ||
306 | Bool_t prop = esdTrack->PropagateTo(fDetectorRadius, magField); | |
307 | ||
308 | // if (prop) Printf("Track propagated, eta: %f, phi: %f, pt: %f", esdTrack->Eta(), esdTrack->Phi(), esdTrack->Pt()); | |
309 | return prop && | |
310 | TMath::Abs(esdTrack->Eta()) < fEtaCutAcc && | |
311 | esdTrack->Phi() > fPhiCutAccMin*TMath::Pi()/180. && | |
312 | esdTrack->Phi() < fPhiCutAccMax*TMath::Pi()/180.; | |
313 | } | |
314 | ||
315 | void AliAnalysisEtReconstructed::FillOutputList(TList* list) | |
316 | { // add some extra histograms to the ones from base class | |
317 | AliAnalysisEt::FillOutputList(list); | |
318 | ||
319 | list->Add(fHistChargedPionEnergyDeposit); | |
320 | list->Add(fHistProtonEnergyDeposit); | |
321 | list->Add(fHistAntiProtonEnergyDeposit); | |
322 | list->Add(fHistChargedKaonEnergyDeposit); | |
323 | list->Add(fHistMuonEnergyDeposit); | |
324 | } | |
325 | ||
326 | void AliAnalysisEtReconstructed::CreateHistograms() | |
327 | { // add some extra histograms to the ones from base class | |
328 | AliAnalysisEt::CreateHistograms(); | |
329 | ||
330 | Int_t nbinsEt = 1000; | |
331 | Double_t minEt = 0; | |
332 | Double_t maxEt = 10; | |
333 | ||
334 | // possibly change histogram limits | |
335 | if (fCuts) { | |
336 | nbinsEt = fCuts->GetHistNbinsParticleEt(); | |
337 | minEt = fCuts->GetHistMinParticleEt(); | |
338 | maxEt = fCuts->GetHistMaxParticleEt(); | |
339 | } | |
340 | ||
341 | TString histname; | |
342 | histname = "fHistChargedPionEnergyDeposit" + fHistogramNameSuffix; | |
343 | fHistChargedPionEnergyDeposit = new TH2F(histname.Data(), "Energy deposited by #pi^{+/-}", nbinsEt, minEt, maxEt, nbinsEt, minEt, maxEt); | |
344 | fHistChargedPionEnergyDeposit->SetXTitle("Energy deposited in calorimeter"); | |
345 | fHistChargedPionEnergyDeposit->SetYTitle("Energy of track"); | |
346 | ||
347 | histname = "fHistProtonEnergyDeposit" + fHistogramNameSuffix; | |
348 | fHistProtonEnergyDeposit = new TH2F(histname.Data(), "Energy deposited by protons", nbinsEt, minEt, maxEt, nbinsEt, minEt, maxEt); | |
349 | fHistProtonEnergyDeposit->SetXTitle("Energy deposited in calorimeter"); | |
350 | fHistProtonEnergyDeposit->SetYTitle("Energy of track"); | |
351 | ||
352 | histname = "fHistAntiProtonEnergyDeposit" + fHistogramNameSuffix; | |
353 | fHistAntiProtonEnergyDeposit = new TH2F(histname.Data(), "Energy deposited by anti-protons", nbinsEt, minEt, maxEt, nbinsEt, minEt, maxEt); | |
354 | fHistAntiProtonEnergyDeposit->SetXTitle("Energy deposited in calorimeter"); | |
355 | fHistAntiProtonEnergyDeposit->SetYTitle("Energy of track"); | |
356 | ||
357 | histname = "fHistChargedKaonEnergyDeposit" + fHistogramNameSuffix; | |
358 | fHistChargedKaonEnergyDeposit = new TH2F(histname.Data(), "Energy deposited by K^{+/-}", nbinsEt, minEt, maxEt, nbinsEt, minEt, maxEt); | |
359 | fHistChargedKaonEnergyDeposit->SetXTitle("Energy deposited in calorimeter"); | |
360 | fHistChargedKaonEnergyDeposit->SetYTitle("Energy of track"); | |
361 | ||
362 | histname = "fHistMuonEnergyDeposit" + fHistogramNameSuffix; | |
363 | fHistMuonEnergyDeposit = new TH2F(histname.Data(), "Energy deposited by #mu^{+/-}", nbinsEt, minEt, maxEt, nbinsEt, minEt, maxEt); | |
364 | fHistMuonEnergyDeposit->SetXTitle("Energy deposited in calorimeter"); | |
365 | fHistMuonEnergyDeposit->SetYTitle("Energy of track"); | |
366 | ||
367 | ||
368 | } | |
369 | ||
370 | Double_t | |
371 | AliAnalysisEtReconstructed::CalcTrackClusterDistance(const Float_t clsPos[3], | |
372 | Int_t *trkMatchId, | |
373 | const AliESDEvent *event) | |
374 | { // calculate distance between cluster and closest track | |
375 | ||
376 | Double_t trkPos[3] = {0,0,0}; | |
377 | ||
378 | Int_t bestTrkMatchId = -1; | |
379 | Double_t distance = 9999; // init to a big number | |
380 | ||
381 | Double_t dist = 0; | |
382 | Double_t distX = 0, distY = 0, distZ = 0; | |
383 | ||
384 | for (Int_t iTrack = 0; iTrack < event->GetNumberOfTracks(); iTrack++) { | |
385 | AliESDtrack *track = event->GetTrack(iTrack); | |
386 | if (!track) { | |
387 | Printf("ERROR: Could not get track %d", iTrack); | |
388 | continue; | |
389 | } | |
390 | ||
391 | // check for approx. eta and phi range before we propagate.. | |
392 | // TBD | |
393 | ||
394 | AliEMCALTrack *emctrack = new AliEMCALTrack(*track); | |
395 | if (!emctrack->PropagateToGlobal(clsPos[0],clsPos[1],clsPos[2],0.,0.) ) { | |
396 | continue; | |
397 | } | |
398 | emctrack->GetXYZ(trkPos); | |
399 | if (emctrack) delete emctrack; | |
400 | ||
401 | distX = clsPos[0]-trkPos[0]; | |
402 | distY = clsPos[1]-trkPos[1]; | |
403 | distZ = clsPos[2]-trkPos[2]; | |
404 | dist = TMath::Sqrt(distX*distX + distY*distY + distZ*distZ); | |
405 | ||
406 | if (dist < distance) { | |
407 | distance = dist; | |
408 | bestTrkMatchId = iTrack; | |
409 | } | |
410 | } // iTrack | |
411 | ||
412 | // printf("CalcTrackClusterDistance: bestTrkMatch %d origTrkMatch %d distance %f\n", bestTrkMatchId, *trkMatchId, distance); | |
413 | *trkMatchId = bestTrkMatchId; | |
414 | return distance; | |
415 | } |