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7ca4655f | 1 | /************************************************************************** |
eefb3acc | 2 | * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. * |
7ca4655f | 3 | * * |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
7284b2b2 | 16 | //_________________________________________________________________________ |
ac903f1b | 17 | // |
7284b2b2 | 18 | // Implementation of the ITS-SPD trackleter class |
ac903f1b | 19 | // |
fa9ed8e9 | 20 | // It retrieves clusters in the pixels (theta and phi) and finds tracklets. |
21 | // These can be used to extract charged particle multiplicity from the ITS. | |
ac903f1b | 22 | // |
fa9ed8e9 | 23 | // A tracklet consists of two ITS clusters, one in the first pixel layer and |
24 | // one in the second. The clusters are associated if the differences in | |
25 | // Phi (azimuth) and Theta (polar angle) are within fiducial windows. | |
26 | // In case of multiple candidates the candidate with minimum | |
27 | // distance is selected. | |
968e8539 | 28 | // |
fa9ed8e9 | 29 | // Two methods return the number of tracklets and the number of unassociated |
7284b2b2 | 30 | // clusters (i.e. not used in any tracklet) in the first SPD layer |
31 | // (GetNTracklets and GetNSingleClusters) | |
32 | // | |
33 | // The cuts on phi and theta depend on the interacting system (p-p or Pb-Pb) | |
34 | // and can be set via AliITSRecoParam class | |
35 | // (SetPhiWindow and SetThetaWindow) | |
ac903f1b | 36 | // |
7284b2b2 | 37 | // Origin: Tiziano Virgili |
38 | // | |
39 | // Current support and development: | |
40 | // Domenico Elia, Maria Nicassio (INFN Bari) | |
41 | // Domenico.Elia@ba.infn.it, Maria.Nicassio@ba.infn.it | |
42 | // | |
43 | // Most recent updates: | |
44 | // - multiple association forbidden (fOnlyOneTrackletPerC2 = kTRUE) | |
f606f16a | 45 | // - phi definition changed to ALICE convention (0,2*TMath::pi()) |
46 | // - cluster coordinates taken with GetGlobalXYZ() | |
9b373e9a | 47 | // - fGeometry removed |
48 | // - number of fired chips on the two layers | |
fa9ed8e9 | 49 | // - option to cut duplicates in the overlaps |
7b116aa1 | 50 | // - options and fiducial cuts via AliITSRecoParam |
fa9ed8e9 | 51 | // - move from DeltaZeta to DeltaTheta cut |
52 | // - update to the new algorithm by Mariella and Jan Fiete | |
53 | // - store also DeltaTheta in the ESD | |
54 | // - less new and delete calls when creating the needed arrays | |
1f9831ab | 55 | // |
56 | // - RS: to decrease the number of new/deletes the clusters data are stored | |
57 | // not in float[6] attached to float**, but in 1-D array. | |
58 | // - RS: Clusters are sorted in Z in roder to have the same numbering as in the ITS reco | |
59 | // - RS: Clusters used by ESDtrack are flagged, this information is passed to AliMulitiplicity object | |
60 | // when storing the tracklets and single cluster info | |
7284b2b2 | 61 | //_________________________________________________________________________ |
ac903f1b | 62 | |
7ca4655f | 63 | #include <TClonesArray.h> |
64 | #include <TH1F.h> | |
65 | #include <TH2F.h> | |
66 | #include <TTree.h> | |
1f9831ab | 67 | #include <TBits.h> |
68 | #include <TArrayI.h> | |
ac903f1b | 69 | |
7ca4655f | 70 | #include "AliITSMultReconstructor.h" |
7b116aa1 | 71 | #include "AliITSReconstructor.h" |
9b373e9a | 72 | #include "AliITSsegmentationSPD.h" |
b51872de | 73 | #include "AliITSRecPoint.h" |
b21c1af0 | 74 | #include "AliITSRecPointContainer.h" |
ac903f1b | 75 | #include "AliITSgeom.h" |
b21c1af0 | 76 | #include "AliITSgeomTGeo.h" |
1f9831ab | 77 | #include "AliITSDetTypeRec.h" |
78 | #include "AliESDEvent.h" | |
79 | #include "AliESDVertex.h" | |
80 | #include "AliESDtrack.h" | |
81 | #include "AliMultiplicity.h" | |
ac903f1b | 82 | #include "AliLog.h" |
fa9ed8e9 | 83 | #include "TGeoGlobalMagField.h" |
84 | #include "AliMagF.h" | |
6de485aa | 85 | #include "AliESDv0.h" |
86 | #include "AliV0.h" | |
87 | #include "AliKFParticle.h" | |
88 | #include "AliKFVertex.h" | |
ac903f1b | 89 | |
90 | //____________________________________________________________________ | |
0762f3a8 | 91 | ClassImp(AliITSMultReconstructor) |
ac903f1b | 92 | |
3ef75756 | 93 | |
ac903f1b | 94 | //____________________________________________________________________ |
7537d03c | 95 | AliITSMultReconstructor::AliITSMultReconstructor(): |
1f9831ab | 96 | fDetTypeRec(0),fESDEvent(0),fTreeRP(0),fUsedClusLay1(0),fUsedClusLay2(0), |
7537d03c | 97 | fClustersLay1(0), |
98 | fClustersLay2(0), | |
7b116aa1 | 99 | fDetectorIndexClustersLay1(0), |
100 | fDetectorIndexClustersLay2(0), | |
101 | fOverlapFlagClustersLay1(0), | |
102 | fOverlapFlagClustersLay2(0), | |
7537d03c | 103 | fTracklets(0), |
968e8539 | 104 | fSClusters(0), |
7537d03c | 105 | fNClustersLay1(0), |
106 | fNClustersLay2(0), | |
107 | fNTracklets(0), | |
968e8539 | 108 | fNSingleCluster(0), |
7537d03c | 109 | fPhiWindow(0), |
7284b2b2 | 110 | fThetaWindow(0), |
fa9ed8e9 | 111 | fPhiShift(0), |
7b116aa1 | 112 | fRemoveClustersFromOverlaps(0), |
113 | fPhiOverlapCut(0), | |
114 | fZetaOverlapCut(0), | |
6de485aa | 115 | // |
116 | fCutPxDrSPDin(0.1), | |
117 | fCutPxDrSPDout(0.15), | |
118 | fCutPxDz(0.2), | |
119 | fCutDCArz(0.5), | |
120 | fCutMinElectronProbTPC(0.5), | |
121 | fCutMinElectronProbESD(0.1), | |
122 | fCutMinP(0.05), | |
123 | fCutMinRGamma(2.), | |
124 | fCutMinRK0(1.), | |
125 | fCutMinPointAngle(0.98), | |
126 | fCutMaxDCADauther(0.5), | |
127 | fCutMassGamma(0.03), | |
128 | fCutMassGammaNSigma(5.), | |
129 | fCutMassK0(0.03), | |
130 | fCutMassK0NSigma(5.), | |
131 | fCutChi2cGamma(2.), | |
132 | fCutChi2cK0(2.), | |
133 | fCutGammaSFromDecay(-10.), | |
134 | fCutK0SFromDecay(-10.), | |
135 | fCutMaxDCA(1.), | |
136 | // | |
7537d03c | 137 | fHistOn(0), |
138 | fhClustersDPhiAcc(0), | |
139 | fhClustersDThetaAcc(0), | |
7537d03c | 140 | fhClustersDPhiAll(0), |
141 | fhClustersDThetaAll(0), | |
7537d03c | 142 | fhDPhiVsDThetaAll(0), |
143 | fhDPhiVsDThetaAcc(0), | |
7537d03c | 144 | fhetaTracklets(0), |
145 | fhphiTracklets(0), | |
146 | fhetaClustersLay1(0), | |
147 | fhphiClustersLay1(0){ | |
9b373e9a | 148 | |
149 | fNFiredChips[0] = 0; | |
150 | fNFiredChips[1] = 0; | |
3ef75756 | 151 | // Method to reconstruct the charged particles multiplicity with the |
152 | // SPD (tracklets). | |
ac903f1b | 153 | |
ac903f1b | 154 | SetHistOn(); |
ac903f1b | 155 | |
7b116aa1 | 156 | if(AliITSReconstructor::GetRecoParam()) { |
7b116aa1 | 157 | SetPhiWindow(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiWindow()); |
7284b2b2 | 158 | SetThetaWindow(AliITSReconstructor::GetRecoParam()->GetTrackleterThetaWindow()); |
fa9ed8e9 | 159 | SetPhiShift(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiShift()); |
7b116aa1 | 160 | SetRemoveClustersFromOverlaps(AliITSReconstructor::GetRecoParam()->GetTrackleterRemoveClustersFromOverlaps()); |
161 | SetPhiOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiOverlapCut()); | |
162 | SetZetaOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterZetaOverlapCut()); | |
6de485aa | 163 | // |
164 | SetCutPxDrSPDin(AliITSReconstructor::GetRecoParam()->GetMultCutPxDrSPDin()); | |
165 | SetCutPxDrSPDout(AliITSReconstructor::GetRecoParam()->GetMultCutPxDrSPDout()); | |
166 | SetCutPxDz(AliITSReconstructor::GetRecoParam()->GetMultCutPxDz()); | |
167 | SetCutDCArz(AliITSReconstructor::GetRecoParam()->GetMultCutDCArz()); | |
168 | SetCutMinElectronProbTPC(AliITSReconstructor::GetRecoParam()->GetMultCutMinElectronProbTPC()); | |
169 | SetCutMinElectronProbESD(AliITSReconstructor::GetRecoParam()->GetMultCutMinElectronProbESD()); | |
170 | SetCutMinP(AliITSReconstructor::GetRecoParam()->GetMultCutMinP()); | |
171 | SetCutMinRGamma(AliITSReconstructor::GetRecoParam()->GetMultCutMinRGamma()); | |
172 | SetCutMinRK0(AliITSReconstructor::GetRecoParam()->GetMultCutMinRK0()); | |
173 | SetCutMinPointAngle(AliITSReconstructor::GetRecoParam()->GetMultCutMinPointAngle()); | |
174 | SetCutMaxDCADauther(AliITSReconstructor::GetRecoParam()->GetMultCutMaxDCADauther()); | |
175 | SetCutMassGamma(AliITSReconstructor::GetRecoParam()->GetMultCutMassGamma()); | |
176 | SetCutMassGammaNSigma(AliITSReconstructor::GetRecoParam()->GetMultCutMassGammaNSigma()); | |
177 | SetCutMassK0(AliITSReconstructor::GetRecoParam()->GetMultCutMassK0()); | |
178 | SetCutMassK0NSigma(AliITSReconstructor::GetRecoParam()->GetMultCutMassK0NSigma()); | |
179 | SetCutChi2cGamma(AliITSReconstructor::GetRecoParam()->GetMultCutChi2cGamma()); | |
180 | SetCutChi2cK0(AliITSReconstructor::GetRecoParam()->GetMultCutChi2cK0()); | |
181 | SetCutGammaSFromDecay(AliITSReconstructor::GetRecoParam()->GetMultCutGammaSFromDecay()); | |
182 | SetCutK0SFromDecay(AliITSReconstructor::GetRecoParam()->GetMultCutK0SFromDecay()); | |
183 | SetCutMaxDCA(AliITSReconstructor::GetRecoParam()->GetMultCutMaxDCA()); | |
184 | // | |
7b116aa1 | 185 | } else { |
7b116aa1 | 186 | SetPhiWindow(); |
7284b2b2 | 187 | SetThetaWindow(); |
fa9ed8e9 | 188 | SetPhiShift(); |
7b116aa1 | 189 | SetRemoveClustersFromOverlaps(); |
190 | SetPhiOverlapCut(); | |
191 | SetZetaOverlapCut(); | |
6de485aa | 192 | // |
193 | SetCutPxDrSPDin(); | |
194 | SetCutPxDrSPDout(); | |
195 | SetCutPxDz(); | |
196 | SetCutDCArz(); | |
197 | SetCutMinElectronProbTPC(); | |
198 | SetCutMinElectronProbESD(); | |
199 | SetCutMinP(); | |
200 | SetCutMinRGamma(); | |
201 | SetCutMinRK0(); | |
202 | SetCutMinPointAngle(); | |
203 | SetCutMaxDCADauther(); | |
204 | SetCutMassGamma(); | |
205 | SetCutMassGammaNSigma(); | |
206 | SetCutMassK0(); | |
207 | SetCutMassK0NSigma(); | |
208 | SetCutChi2cGamma(); | |
209 | SetCutChi2cK0(); | |
210 | SetCutGammaSFromDecay(); | |
211 | SetCutK0SFromDecay(); | |
212 | SetCutMaxDCA(); | |
7b116aa1 | 213 | } |
214 | ||
fa9ed8e9 | 215 | fClustersLay1 = 0; |
216 | fClustersLay2 = 0; | |
217 | fDetectorIndexClustersLay1 = 0; | |
218 | fDetectorIndexClustersLay2 = 0; | |
219 | fOverlapFlagClustersLay1 = 0; | |
220 | fOverlapFlagClustersLay2 = 0; | |
221 | fTracklets = 0; | |
222 | fSClusters = 0; | |
ac903f1b | 223 | |
224 | // definition of histograms | |
fa9ed8e9 | 225 | Bool_t oldStatus = TH1::AddDirectoryStatus(); |
226 | TH1::AddDirectory(kFALSE); | |
227 | ||
7284b2b2 | 228 | fhClustersDPhiAcc = new TH1F("dphiacc", "dphi", 100,-0.1,0.1); |
ddced3c8 | 229 | fhClustersDThetaAcc = new TH1F("dthetaacc","dtheta",100,-0.1,0.1); |
ddced3c8 | 230 | |
7284b2b2 | 231 | fhDPhiVsDThetaAcc = new TH2F("dphiVsDthetaAcc","",100,-0.1,0.1,100,-0.1,0.1); |
ac903f1b | 232 | |
02a95988 | 233 | fhClustersDPhiAll = new TH1F("dphiall", "dphi", 100,0.0,0.5); |
7284b2b2 | 234 | fhClustersDThetaAll = new TH1F("dthetaall","dtheta",100,0.0,0.5); |
ddced3c8 | 235 | |
7284b2b2 | 236 | fhDPhiVsDThetaAll = new TH2F("dphiVsDthetaAll","",100,0.,0.5,100,0.,0.5); |
ddced3c8 | 237 | |
238 | fhetaTracklets = new TH1F("etaTracklets", "eta", 100,-2.,2.); | |
f606f16a | 239 | fhphiTracklets = new TH1F("phiTracklets", "phi", 100, 0., 2*TMath::Pi()); |
ddced3c8 | 240 | fhetaClustersLay1 = new TH1F("etaClustersLay1", "etaCl1", 100,-2.,2.); |
f606f16a | 241 | fhphiClustersLay1 = new TH1F("phiClustersLay1", "phiCl1", 100, 0., 2*TMath::Pi()); |
fa9ed8e9 | 242 | |
243 | TH1::AddDirectory(oldStatus); | |
ac903f1b | 244 | } |
ddced3c8 | 245 | |
3ef75756 | 246 | //______________________________________________________________________ |
1f9831ab | 247 | AliITSMultReconstructor::AliITSMultReconstructor(const AliITSMultReconstructor &mr) : |
248 | AliTrackleter(mr), | |
249 | fDetTypeRec(0),fESDEvent(0),fTreeRP(0),fUsedClusLay1(0),fUsedClusLay2(0), | |
250 | fClustersLay1(0), | |
251 | fClustersLay2(0), | |
252 | fDetectorIndexClustersLay1(0), | |
253 | fDetectorIndexClustersLay2(0), | |
254 | fOverlapFlagClustersLay1(0), | |
255 | fOverlapFlagClustersLay2(0), | |
256 | fTracklets(0), | |
257 | fSClusters(0), | |
258 | fNClustersLay1(0), | |
259 | fNClustersLay2(0), | |
260 | fNTracklets(0), | |
261 | fNSingleCluster(0), | |
262 | fPhiWindow(0), | |
263 | fThetaWindow(0), | |
264 | fPhiShift(0), | |
265 | fRemoveClustersFromOverlaps(0), | |
266 | fPhiOverlapCut(0), | |
267 | fZetaOverlapCut(0), | |
6de485aa | 268 | // |
269 | fCutPxDrSPDin(0.1), | |
270 | fCutPxDrSPDout(0.15), | |
271 | fCutPxDz(0.2), | |
272 | fCutDCArz(0.5), | |
273 | fCutMinElectronProbTPC(0.5), | |
274 | fCutMinElectronProbESD(0.1), | |
275 | fCutMinP(0.05), | |
276 | fCutMinRGamma(2.), | |
277 | fCutMinRK0(1.), | |
278 | fCutMinPointAngle(0.98), | |
279 | fCutMaxDCADauther(0.5), | |
280 | fCutMassGamma(0.03), | |
281 | fCutMassGammaNSigma(5.), | |
282 | fCutMassK0(0.03), | |
283 | fCutMassK0NSigma(5.), | |
284 | fCutChi2cGamma(2.), | |
285 | fCutChi2cK0(2.), | |
286 | fCutGammaSFromDecay(-10.), | |
287 | fCutK0SFromDecay(-10.), | |
288 | fCutMaxDCA(1.), | |
289 | // | |
1f9831ab | 290 | fHistOn(0), |
291 | fhClustersDPhiAcc(0), | |
292 | fhClustersDThetaAcc(0), | |
293 | fhClustersDPhiAll(0), | |
294 | fhClustersDThetaAll(0), | |
295 | fhDPhiVsDThetaAll(0), | |
296 | fhDPhiVsDThetaAcc(0), | |
297 | fhetaTracklets(0), | |
298 | fhphiTracklets(0), | |
299 | fhetaClustersLay1(0), | |
300 | fhphiClustersLay1(0) | |
301 | { | |
302 | // Copy constructor :!!! RS ATTENTION: old c-tor reassigned the pointers instead of creating a new copy -> would crash on delete | |
303 | AliError("May not use"); | |
3ef75756 | 304 | } |
305 | ||
306 | //______________________________________________________________________ | |
7537d03c | 307 | AliITSMultReconstructor& AliITSMultReconstructor::operator=(const AliITSMultReconstructor& mr){ |
3ef75756 | 308 | // Assignment operator |
1f9831ab | 309 | if (this != &mr) { |
310 | this->~AliITSMultReconstructor(); | |
311 | new(this) AliITSMultReconstructor(mr); | |
312 | } | |
3ef75756 | 313 | return *this; |
314 | } | |
315 | ||
316 | //______________________________________________________________________ | |
317 | AliITSMultReconstructor::~AliITSMultReconstructor(){ | |
318 | // Destructor | |
1ba5b31c | 319 | |
320 | // delete histograms | |
321 | delete fhClustersDPhiAcc; | |
322 | delete fhClustersDThetaAcc; | |
1ba5b31c | 323 | delete fhClustersDPhiAll; |
324 | delete fhClustersDThetaAll; | |
1ba5b31c | 325 | delete fhDPhiVsDThetaAll; |
326 | delete fhDPhiVsDThetaAcc; | |
1ba5b31c | 327 | delete fhetaTracklets; |
328 | delete fhphiTracklets; | |
329 | delete fhetaClustersLay1; | |
330 | delete fhphiClustersLay1; | |
1f9831ab | 331 | delete[] fUsedClusLay1; |
332 | delete[] fUsedClusLay2; | |
333 | // delete arrays | |
fa9ed8e9 | 334 | for(Int_t i=0; i<fNTracklets; i++) |
1ba5b31c | 335 | delete [] fTracklets[i]; |
fa9ed8e9 | 336 | |
337 | for(Int_t i=0; i<fNSingleCluster; i++) | |
968e8539 | 338 | delete [] fSClusters[i]; |
fa9ed8e9 | 339 | |
1ba5b31c | 340 | delete [] fClustersLay1; |
341 | delete [] fClustersLay2; | |
7b116aa1 | 342 | delete [] fDetectorIndexClustersLay1; |
343 | delete [] fDetectorIndexClustersLay2; | |
344 | delete [] fOverlapFlagClustersLay1; | |
345 | delete [] fOverlapFlagClustersLay2; | |
1ba5b31c | 346 | delete [] fTracklets; |
968e8539 | 347 | delete [] fSClusters; |
ddced3c8 | 348 | } |
ac903f1b | 349 | |
350 | //____________________________________________________________________ | |
1f9831ab | 351 | void AliITSMultReconstructor::Reconstruct(AliESDEvent* esd, TTree* treeRP) |
352 | { | |
ac903f1b | 353 | // |
1f9831ab | 354 | // - calls LoadClusterArrays that finds the position of the clusters |
ac903f1b | 355 | // (in global coord) |
356 | // - convert the cluster coordinates to theta, phi (seen from the | |
7284b2b2 | 357 | // interaction vertex). |
ac903f1b | 358 | // - makes an array of tracklets |
359 | // | |
360 | // After this method has been called, the clusters of the two layers | |
361 | // and the tracklets can be retrieved by calling the Get'er methods. | |
362 | ||
6873ed43 | 363 | if (!treeRP) { AliError(" Invalid ITS cluster tree !\n"); return; } |
364 | if (!esd) {AliError("ESDEvent is not available, use old reconstructor"); return;} | |
ac903f1b | 365 | // reset counters |
1f9831ab | 366 | if (fMult) delete fMult; fMult = 0; |
367 | fNClustersLay1 = 0; | |
368 | fNClustersLay2 = 0; | |
369 | fNTracklets = 0; | |
370 | fNSingleCluster = 0; | |
371 | // | |
1f9831ab | 372 | fESDEvent = esd; |
373 | fTreeRP = treeRP; | |
374 | // | |
375 | // >>>> RS: this part is equivalent to former AliITSVertexer::FindMultiplicity | |
376 | // | |
377 | // see if there is a SPD vertex | |
378 | Bool_t isVtxOK=kTRUE, isCosmics=kFALSE; | |
379 | AliESDVertex* vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexSPD(); | |
380 | if (!vtx && vtx->GetNContributors()<0) isVtxOK = kFALSE; | |
381 | if (vtx && strstr(vtx->GetTitle(),"cosmics")) { | |
382 | isVtxOK = kFALSE; | |
383 | isCosmics = kTRUE; | |
384 | } | |
385 | // | |
386 | if (!isVtxOK) { | |
387 | if (!isCosmics) { | |
388 | AliDebug(1,"Tracklets multiplicity not determined because the primary vertex was not found"); | |
389 | AliDebug(1,"Just counting the number of cluster-fired chips on the SPD layers"); | |
390 | } | |
391 | vtx = 0; | |
392 | } | |
393 | float vtxf[3] = {vtx->GetX(),vtx->GetY(),vtx->GetZ()}; | |
394 | FindTracklets(vtxf); | |
395 | // | |
396 | CreateMultiplicityObject(); | |
397 | } | |
398 | ||
399 | //____________________________________________________________________ | |
400 | void AliITSMultReconstructor::Reconstruct(TTree* clusterTree, Float_t* vtx, Float_t* /* vtxRes*/) { | |
401 | // | |
402 | // RS NOTE - this is old reconstructor invocation, to be used from VertexFinder | |
403 | // | |
404 | // - calls LoadClusterArray that finds the position of the clusters | |
405 | // (in global coord) | |
406 | // - convert the cluster coordinates to theta, phi (seen from the | |
407 | // interaction vertex). | |
408 | // - makes an array of tracklets | |
409 | // | |
410 | // After this method has been called, the clusters of the two layers | |
411 | // and the tracklets can be retrieved by calling the Get'er methods. | |
412 | if (fMult) delete fMult; fMult = 0; | |
ac903f1b | 413 | fNClustersLay1 = 0; |
414 | fNClustersLay2 = 0; | |
415 | fNTracklets = 0; | |
7284b2b2 | 416 | fNSingleCluster = 0; |
1f9831ab | 417 | // |
418 | if (!clusterTree) { AliError(" Invalid ITS cluster tree !\n"); return; } | |
419 | // | |
420 | fESDEvent = 0; | |
421 | fTreeRP = clusterTree; | |
422 | // | |
423 | FindTracklets(vtx); | |
424 | // | |
425 | } | |
7284b2b2 | 426 | |
1f9831ab | 427 | //____________________________________________________________________ |
428 | void AliITSMultReconstructor::FindTracklets(const Float_t *vtx) | |
429 | { | |
430 | // Find tracklets converging to vertex | |
431 | // | |
432 | LoadClusterArrays(fTreeRP); | |
433 | // flag clusters used by ESD tracks | |
6873ed43 | 434 | if (fESDEvent) ProcessESDTracks(); |
1f9831ab | 435 | |
436 | if (!vtx) return; | |
3ef75756 | 437 | |
7284b2b2 | 438 | const Double_t pi = TMath::Pi(); |
fa9ed8e9 | 439 | |
440 | // dPhi shift is field dependent | |
441 | // get average magnetic field | |
442 | Float_t bz = 0; | |
443 | AliMagF* field = 0; | |
1f9831ab | 444 | if (TGeoGlobalMagField::Instance()) field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField()); |
fa9ed8e9 | 445 | if (!field) |
446 | { | |
447 | AliError("Could not retrieve magnetic field. Assuming no field. Delta Phi shift will be deactivated in AliITSMultReconstructor.") | |
448 | } | |
449 | else | |
450 | bz = TMath::Abs(field->SolenoidField()); | |
451 | ||
452 | const Double_t dPhiShift = fPhiShift / 5 * bz; | |
453 | AliDebug(1, Form("Using phi shift of %f", dPhiShift)); | |
454 | ||
455 | const Double_t dPhiWindow2 = fPhiWindow * fPhiWindow; | |
456 | const Double_t dThetaWindow2 = fThetaWindow * fThetaWindow; | |
457 | ||
7284b2b2 | 458 | Int_t* partners = new Int_t[fNClustersLay2]; |
459 | Float_t* minDists = new Float_t[fNClustersLay2]; | |
460 | Int_t* associatedLay1 = new Int_t[fNClustersLay1]; | |
461 | TArrayI** blacklist = new TArrayI*[fNClustersLay1]; | |
462 | ||
463 | for (Int_t i=0; i<fNClustersLay2; i++) { | |
464 | partners[i] = -1; | |
465 | minDists[i] = 2; | |
466 | } | |
467 | for (Int_t i=0; i<fNClustersLay1; i++) | |
468 | associatedLay1[i] = 0; | |
469 | for (Int_t i=0; i<fNClustersLay1; i++) | |
470 | blacklist[i] = 0; | |
471 | ||
ac903f1b | 472 | // find the tracklets |
473 | AliDebug(1,"Looking for tracklets... "); | |
fa9ed8e9 | 474 | |
ac903f1b | 475 | //########################################################### |
476 | // Loop on layer 1 : finding theta, phi and z | |
477 | for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) { | |
1f9831ab | 478 | float *clPar = GetClusterLayer1(iC1); |
479 | Float_t x = clPar[kClTh] - vtx[0]; | |
480 | Float_t y = clPar[kClPh] - vtx[1]; | |
481 | Float_t z = clPar[kClZ] - vtx[2]; | |
ddced3c8 | 482 | |
fa9ed8e9 | 483 | Float_t r = TMath::Sqrt(x*x + y*y + z*z); |
ac903f1b | 484 | |
1f9831ab | 485 | clPar[kClTh] = TMath::ACos(z/r); // Store Theta |
486 | clPar[kClPh] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi | |
fa9ed8e9 | 487 | |
ddced3c8 | 488 | if (fHistOn) { |
1f9831ab | 489 | Float_t eta = clPar[kClTh]; |
ddced3c8 | 490 | eta= TMath::Tan(eta/2.); |
491 | eta=-TMath::Log(eta); | |
492 | fhetaClustersLay1->Fill(eta); | |
1f9831ab | 493 | fhphiClustersLay1->Fill(clPar[kClPh]); |
ddced3c8 | 494 | } |
96c2c35d | 495 | } |
ac903f1b | 496 | |
497 | // Loop on layer 2 : finding theta, phi and r | |
498 | for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) { | |
1f9831ab | 499 | float *clPar = GetClusterLayer2(iC2); |
500 | Float_t x = clPar[kClTh] - vtx[0]; | |
501 | Float_t y = clPar[kClPh] - vtx[1]; | |
502 | Float_t z = clPar[kClZ] - vtx[2]; | |
ddced3c8 | 503 | |
fa9ed8e9 | 504 | Float_t r = TMath::Sqrt(x*x + y*y + z*z); |
1f9831ab | 505 | |
506 | clPar[kClTh] = TMath::ACos(z/r); // Store Theta | |
507 | clPar[kClPh] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi | |
ac903f1b | 508 | } |
509 | ||
510 | //########################################################### | |
7284b2b2 | 511 | Int_t found = 1; |
512 | while (found > 0) { | |
7284b2b2 | 513 | found = 0; |
514 | ||
515 | // Step1: find all tracklets allowing double assocation | |
516 | // Loop on layer 1 | |
517 | for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) { | |
518 | ||
519 | // already used or in the overlap ? | |
520 | if (associatedLay1[iC1] != 0 || fOverlapFlagClustersLay1[iC1]) continue; | |
ac903f1b | 521 | |
7284b2b2 | 522 | found++; |
523 | ||
524 | // reset of variables for multiple candidates | |
525 | Int_t iC2WithBestDist = -1; // reset | |
526 | Double_t minDist = 2; // reset | |
1f9831ab | 527 | float* clPar1 = GetClusterLayer1(iC1); |
528 | ||
7284b2b2 | 529 | // Loop on layer 2 |
530 | for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) { | |
531 | ||
532 | // in the overlap ? | |
533 | if (fOverlapFlagClustersLay2[iC2]) continue; | |
1f9831ab | 534 | float* clPar2 = GetClusterLayer2(iC2); |
7284b2b2 | 535 | |
536 | if (blacklist[iC1]) { | |
537 | Bool_t blacklisted = kFALSE; | |
1f9831ab | 538 | for (Int_t i=blacklist[iC1]->GetSize(); i--;) { |
7284b2b2 | 539 | if (blacklist[iC1]->At(i) == iC2) { |
540 | blacklisted = kTRUE; | |
541 | break; | |
542 | } | |
543 | } | |
544 | if (blacklisted) continue; | |
545 | } | |
546 | ||
ac903f1b | 547 | // find the difference in angles |
1f9831ab | 548 | Double_t dTheta = TMath::Abs(clPar2[kClTh] - clPar1[kClTh]); |
549 | Double_t dPhi = TMath::Abs(clPar2[kClPh] - clPar1[kClPh]); | |
02a95988 | 550 | // take into account boundary condition |
7284b2b2 | 551 | if (dPhi>pi) dPhi=2.*pi-dPhi; |
fa9ed8e9 | 552 | |
ddced3c8 | 553 | if (fHistOn) { |
7284b2b2 | 554 | fhClustersDPhiAll->Fill(dPhi); |
ddced3c8 | 555 | fhClustersDThetaAll->Fill(dTheta); |
ac903f1b | 556 | fhDPhiVsDThetaAll->Fill(dTheta, dPhi); |
557 | } | |
fa9ed8e9 | 558 | |
559 | dPhi -= dPhiShift; | |
560 | ||
7284b2b2 | 561 | // make "elliptical" cut in Phi and Theta! |
fa9ed8e9 | 562 | Float_t d = dPhi*dPhi/dPhiWindow2 + dTheta*dTheta/dThetaWindow2; |
7284b2b2 | 563 | |
564 | // look for the minimum distance: the minimum is in iC2WithBestDist | |
fa9ed8e9 | 565 | if (d<1 && d<minDist) { |
7284b2b2 | 566 | minDist=d; |
ddced3c8 | 567 | iC2WithBestDist = iC2; |
ac903f1b | 568 | } |
7284b2b2 | 569 | } // end of loop over clusters in layer 2 |
ac903f1b | 570 | |
7284b2b2 | 571 | if (minDist<1) { // This means that a cluster in layer 2 was found that matches with iC1 |
572 | ||
573 | if (minDists[iC2WithBestDist] > minDist) { | |
574 | Int_t oldPartner = partners[iC2WithBestDist]; | |
575 | partners[iC2WithBestDist] = iC1; | |
576 | minDists[iC2WithBestDist] = minDist; | |
577 | ||
578 | // mark as assigned | |
579 | associatedLay1[iC1] = 1; | |
580 | ||
581 | if (oldPartner != -1) { | |
fa9ed8e9 | 582 | // redo partner search for cluster in L0 (oldPartner), putting this one (iC2WithBestDist) on its blacklist |
7284b2b2 | 583 | if (blacklist[oldPartner] == 0) { |
584 | blacklist[oldPartner] = new TArrayI(1); | |
585 | } else blacklist[oldPartner]->Set(blacklist[oldPartner]->GetSize()+1); | |
586 | ||
587 | blacklist[oldPartner]->AddAt(iC2WithBestDist, blacklist[oldPartner]->GetSize()-1); | |
588 | ||
589 | // mark as free | |
fa9ed8e9 | 590 | associatedLay1[oldPartner] = 0; |
7284b2b2 | 591 | } |
592 | } else { | |
593 | // try again to find a cluster without considering iC2WithBestDist | |
594 | if (blacklist[iC1] == 0) { | |
595 | blacklist[iC1] = new TArrayI(1); | |
596 | } | |
fa9ed8e9 | 597 | else |
598 | blacklist[iC1]->Set(blacklist[iC1]->GetSize()+1); | |
7284b2b2 | 599 | |
600 | blacklist[iC1]->AddAt(iC2WithBestDist, blacklist[iC1]->GetSize()-1); | |
601 | } | |
de4c520e | 602 | |
7284b2b2 | 603 | } else // cluster has no partner; remove |
604 | associatedLay1[iC1] = 2; | |
605 | } // end of loop over clusters in layer 1 | |
606 | } | |
607 | ||
608 | // Step2: store tracklets; remove used clusters | |
609 | for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) { | |
de4c520e | 610 | |
7284b2b2 | 611 | if (partners[iC2] == -1) continue; |
7b116aa1 | 612 | |
7284b2b2 | 613 | if (fRemoveClustersFromOverlaps) FlagClustersInOverlapRegions (partners[iC2],iC2); |
614 | ||
aba7fa71 | 615 | |
616 | if (fOverlapFlagClustersLay1[partners[iC2]] || fOverlapFlagClustersLay2[iC2]) continue; | |
617 | ||
1f9831ab | 618 | float* clPar2 = GetClusterLayer2(iC2); |
619 | float* clPar1 = GetClusterLayer1(partners[iC2]); | |
620 | ||
621 | Float_t* tracklet = fTracklets[fNTracklets] = new Float_t[kTrNPar]; // RS Add also the cluster id's | |
fa9ed8e9 | 622 | |
7284b2b2 | 623 | // use the theta from the clusters in the first layer |
1f9831ab | 624 | tracklet[kTrTheta] = clPar1[kClTh]; |
7284b2b2 | 625 | // use the phi from the clusters in the first layer |
1f9831ab | 626 | tracklet[kTrPhi] = clPar1[kClPh]; |
7284b2b2 | 627 | // store the difference between phi1 and phi2 |
1f9831ab | 628 | tracklet[kTrDPhi] = clPar1[kClPh] - clPar2[kClPh]; |
7284b2b2 | 629 | |
630 | // define dphi in the range [0,pi] with proper sign (track charge correlated) | |
1f9831ab | 631 | if (tracklet[kTrDPhi] > TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]-2.*TMath::Pi(); |
632 | if (tracklet[kTrDPhi] < -TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]+2.*TMath::Pi(); | |
7b116aa1 | 633 | |
7284b2b2 | 634 | // store the difference between theta1 and theta2 |
1f9831ab | 635 | tracklet[kTrDTheta] = clPar1[kClTh] - clPar2[kClTh]; |
7284b2b2 | 636 | |
637 | if (fHistOn) { | |
1f9831ab | 638 | fhClustersDPhiAcc->Fill(tracklet[kTrDPhi]); |
639 | fhClustersDThetaAcc->Fill(tracklet[kTrDTheta]); | |
640 | fhDPhiVsDThetaAcc->Fill(tracklet[kTrDTheta],tracklet[kTrDPhi]); | |
ac903f1b | 641 | } |
3ef75756 | 642 | |
7284b2b2 | 643 | // find label |
644 | // if equal label in both clusters found this label is assigned | |
645 | // if no equal label can be found the first labels of the L1 AND L2 cluster are assigned | |
646 | Int_t label1 = 0; | |
647 | Int_t label2 = 0; | |
648 | while (label2 < 3) { | |
1f9831ab | 649 | if ((Int_t) clPar1[kClMC0+label1] != -2 && (Int_t) clPar1[kClMC0+label1] == (Int_t) clPar2[kClMC0+label2]) |
7284b2b2 | 650 | break; |
651 | label1++; | |
652 | if (label1 == 3) { | |
653 | label1 = 0; | |
654 | label2++; | |
655 | } | |
656 | } | |
657 | if (label2 < 3) { | |
1f9831ab | 658 | AliDebug(AliLog::kDebug, Form("Found label %d == %d for tracklet candidate %d\n", (Int_t) clPar1[kClMC0+label1], (Int_t) clPar1[kClMC0+label2], fNTracklets)); |
659 | tracklet[kTrLab1] = clPar1[kClMC0+label1]; | |
660 | tracklet[kTrLab2] = clPar2[kClMC0+label2]; | |
7284b2b2 | 661 | } else { |
1f9831ab | 662 | AliDebug(AliLog::kDebug, Form("Did not find label %d %d %d %d %d %d for tracklet candidate %d\n", (Int_t) clPar1[kClMC0], (Int_t) clPar1[kClMC1], (Int_t) clPar1[kClMC2], (Int_t) clPar2[kClMC0], (Int_t) clPar2[kClMC1], (Int_t) clPar2[kClMC2], fNTracklets)); |
663 | tracklet[kTrLab1] = clPar1[kClMC0]; | |
664 | tracklet[kTrLab2] = clPar2[kClMC0]; | |
7284b2b2 | 665 | } |
666 | ||
667 | if (fHistOn) { | |
1f9831ab | 668 | Float_t eta = tracklet[kTrTheta]; |
7284b2b2 | 669 | eta= TMath::Tan(eta/2.); |
670 | eta=-TMath::Log(eta); | |
671 | fhetaTracklets->Fill(eta); | |
1f9831ab | 672 | fhphiTracklets->Fill(tracklet[kTrPhi]); |
7284b2b2 | 673 | } |
1f9831ab | 674 | // |
675 | tracklet[kClID1] = partners[iC2]; | |
676 | tracklet[kClID2] = iC2; | |
677 | // | |
7284b2b2 | 678 | AliDebug(1,Form(" Adding tracklet candidate %d ", fNTracklets)); |
679 | AliDebug(1,Form(" Cl. %d of Layer 1 and %d of Layer 2", partners[iC2], iC2)); | |
680 | fNTracklets++; | |
3ef75756 | 681 | |
7284b2b2 | 682 | associatedLay1[partners[iC2]] = 1; |
683 | } | |
684 | ||
685 | // Delete the following else if you do not want to save Clusters! | |
686 | // store the cluster | |
687 | for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) { | |
1f9831ab | 688 | |
689 | float* clPar1 = GetClusterLayer1(iC1); | |
690 | ||
7284b2b2 | 691 | if (associatedLay1[iC1]==2||associatedLay1[iC1]==0) { |
1f9831ab | 692 | fSClusters[fNSingleCluster] = new Float_t[kClNPar]; |
693 | fSClusters[fNSingleCluster][kSCTh] = clPar1[kClTh]; | |
694 | fSClusters[fNSingleCluster][kSCPh] = clPar1[kClPh]; | |
695 | fSClusters[fNSingleCluster][kSCID] = iC1; | |
de4c520e | 696 | AliDebug(1,Form(" Adding a single cluster %d (cluster %d of layer 1)", |
7284b2b2 | 697 | fNSingleCluster, iC1)); |
968e8539 | 698 | fNSingleCluster++; |
3ef75756 | 699 | } |
7284b2b2 | 700 | } |
701 | ||
702 | delete[] partners; | |
703 | delete[] minDists; | |
704 | ||
705 | for (Int_t i=0; i<fNClustersLay1; i++) | |
706 | if (blacklist[i]) | |
707 | delete blacklist[i]; | |
708 | delete[] blacklist; | |
709 | ||
ac903f1b | 710 | AliDebug(1,Form("%d tracklets found", fNTracklets)); |
711 | } | |
712 | ||
713 | //____________________________________________________________________ | |
1f9831ab | 714 | void AliITSMultReconstructor::CreateMultiplicityObject() |
715 | { | |
716 | // create AliMultiplicity object and store it in the ESD event | |
717 | // | |
718 | TBits fastOrFiredMap,firedChipMap; | |
719 | if (fDetTypeRec) { | |
720 | fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap(); | |
721 | firedChipMap = fDetTypeRec->GetFiredChipMap(fTreeRP); | |
722 | } | |
723 | // | |
724 | fMult = new AliMultiplicity(fNTracklets,fNSingleCluster,fNFiredChips[0],fNFiredChips[1],fastOrFiredMap); | |
725 | fMult->SetFiredChipMap(firedChipMap); | |
726 | AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance(); | |
727 | fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,fTreeRP)); | |
728 | for(Int_t kk=2;kk<=6;kk++) fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk)); | |
729 | // | |
730 | for (int i=fNTracklets;i--;) { | |
731 | float* tlInfo = fTracklets[i]; | |
732 | fMult->SetTrackletData(i,tlInfo, fUsedClusLay1[int(tlInfo[kClID1])]|fUsedClusLay2[int(tlInfo[kClID2])]); | |
733 | } | |
734 | // | |
735 | for (int i=fNSingleCluster;i--;) { | |
736 | float* clInfo = fSClusters[i]; | |
737 | fMult->SetSingleClusterData(i,clInfo,fUsedClusLay1[int(clInfo[kSCID])]); | |
738 | } | |
739 | fMult->CompactBits(); | |
740 | // | |
741 | } | |
742 | ||
743 | ||
744 | //____________________________________________________________________ | |
745 | void AliITSMultReconstructor::LoadClusterArrays(TTree* itsClusterTree) | |
746 | { | |
ac903f1b | 747 | // This method |
748 | // - gets the clusters from the cluster tree | |
749 | // - convert them into global coordinates | |
750 | // - store them in the internal arrays | |
9b373e9a | 751 | // - count the number of cluster-fired chips |
1f9831ab | 752 | // |
753 | // RS: This method was strongly modified wrt original by Jan Fiete. In order to have the same numbering | |
754 | // of clusters as in the ITS reco I had to introduce sorting in Z | |
755 | // Also note that now the clusters data are stored not in float[6] attached to float**, but in 1-D array | |
ac903f1b | 756 | |
9b373e9a | 757 | AliDebug(1,"Loading clusters and cluster-fired chips ..."); |
ac903f1b | 758 | |
759 | fNClustersLay1 = 0; | |
760 | fNClustersLay2 = 0; | |
9b373e9a | 761 | fNFiredChips[0] = 0; |
762 | fNFiredChips[1] = 0; | |
ac903f1b | 763 | |
b21c1af0 | 764 | AliITSsegmentationSPD seg; |
9b373e9a | 765 | |
b21c1af0 | 766 | AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance(); |
767 | TClonesArray* itsClusters=rpcont->FetchClusters(0,itsClusterTree); | |
768 | if(!rpcont->IsSPDActive()){ | |
769 | AliWarning("No SPD rec points found, multiplicity not calculated"); | |
770 | return; | |
771 | } | |
1f9831ab | 772 | // |
fa9ed8e9 | 773 | // count clusters |
b21c1af0 | 774 | // loop over the SPD subdetectors |
1f9831ab | 775 | TObjArray clArr(100); |
776 | for (int il=0;il<2;il++) { | |
777 | int nclLayer = 0; | |
778 | int detMin = AliITSgeomTGeo::GetModuleIndex(il+1,1,1); | |
779 | int detMax = AliITSgeomTGeo::GetModuleIndex(il+2,1,1); | |
780 | for (int idt=detMin;idt<detMax;idt++) { | |
781 | itsClusters=rpcont->UncheckedGetClusters(idt); | |
782 | int nClusters = itsClusters->GetEntriesFast(); | |
783 | if (!nClusters) continue; | |
784 | Int_t nClustersInChip[5] = {0,0,0,0,0}; | |
785 | while(nClusters--) { | |
786 | AliITSRecPoint* cluster = (AliITSRecPoint*)itsClusters->UncheckedAt(nClusters); | |
787 | if (!cluster) continue; | |
1aa4b2f2 | 788 | clArr.AddAtAndExpand(cluster,nclLayer++); |
1f9831ab | 789 | nClustersInChip[ seg.GetChipFromLocal(0,cluster->GetDetLocalZ()) ]++; |
ac903f1b | 790 | } |
1f9831ab | 791 | for(Int_t ifChip=5;ifChip--;) if (nClustersInChip[ifChip]) fNFiredChips[il]++; |
9b373e9a | 792 | } |
1f9831ab | 793 | // sort the clusters in Z (to have the same numbering as in ITS reco |
794 | Float_t *z = new Float_t[nclLayer]; | |
795 | Int_t * index = new Int_t[nclLayer]; | |
796 | for (int ic=0;ic<nclLayer;ic++) z[ic] = ((AliITSRecPoint*)clArr[ic])->GetZ(); | |
797 | TMath::Sort(nclLayer,z,index,kFALSE); | |
798 | Float_t* clustersLay = new Float_t[nclLayer*kClNPar]; | |
799 | Int_t* detectorIndexClustersLay = new Int_t[nclLayer]; | |
800 | Bool_t* overlapFlagClustersLay = new Bool_t[nclLayer]; | |
801 | Char_t* usedClusLay = new Char_t[nclLayer]; | |
802 | // | |
803 | for (int ic=0;ic<nclLayer;ic++) { | |
804 | AliITSRecPoint* cluster = (AliITSRecPoint*)clArr[index[ic]]; | |
805 | float* clPar = &clustersLay[ic*kClNPar]; | |
806 | // | |
807 | cluster->GetGlobalXYZ( clPar ); | |
808 | detectorIndexClustersLay[ic] = cluster->GetDetectorIndex(); | |
809 | overlapFlagClustersLay[ic] = kFALSE; | |
810 | usedClusLay[ic] = 0; | |
811 | for (Int_t i=3;i--;) clPar[kClMC0+i] = cluster->GetLabel(i); | |
812 | } | |
813 | clArr.Clear(); | |
814 | delete[] z; | |
815 | delete[] index; | |
816 | // | |
817 | if (il==0) { | |
818 | fClustersLay1 = clustersLay; | |
819 | fOverlapFlagClustersLay1 = overlapFlagClustersLay; | |
820 | fDetectorIndexClustersLay1 = detectorIndexClustersLay; | |
821 | fUsedClusLay1 = usedClusLay; | |
822 | fNClustersLay1 = nclLayer; | |
823 | } | |
824 | else { | |
825 | fClustersLay2 = clustersLay; | |
826 | fOverlapFlagClustersLay2 = overlapFlagClustersLay; | |
827 | fDetectorIndexClustersLay2 = detectorIndexClustersLay; | |
828 | fUsedClusLay2 = usedClusLay; | |
829 | fNClustersLay2 = nclLayer; | |
830 | } | |
831 | } | |
832 | // | |
833 | // no double association allowed | |
834 | int nmaxT = TMath::Min(fNClustersLay1, fNClustersLay2); | |
835 | fTracklets = new Float_t*[nmaxT]; | |
836 | fSClusters = new Float_t*[fNClustersLay1]; | |
837 | for (Int_t i=nmaxT;i--;) fTracklets[i] = 0; | |
838 | // | |
ac903f1b | 839 | AliDebug(1,Form("(clusters in layer 1 : %d, layer 2: %d)",fNClustersLay1,fNClustersLay2)); |
9b373e9a | 840 | AliDebug(1,Form("(cluster-fired chips in layer 1 : %d, layer 2: %d)",fNFiredChips[0],fNFiredChips[1])); |
841 | } | |
842 | //____________________________________________________________________ | |
843 | void | |
844 | AliITSMultReconstructor::LoadClusterFiredChips(TTree* itsClusterTree) { | |
845 | // This method | |
846 | // - gets the clusters from the cluster tree | |
847 | // - counts the number of (cluster)fired chips | |
848 | ||
849 | AliDebug(1,"Loading cluster-fired chips ..."); | |
850 | ||
851 | fNFiredChips[0] = 0; | |
852 | fNFiredChips[1] = 0; | |
853 | ||
b21c1af0 | 854 | AliITSsegmentationSPD seg; |
855 | AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance(); | |
856 | TClonesArray* itsClusters=rpcont->FetchClusters(0,itsClusterTree); | |
857 | if(!rpcont->IsSPDActive()){ | |
858 | AliWarning("No SPD rec points found, multiplicity not calculated"); | |
859 | return; | |
860 | } | |
9b373e9a | 861 | |
9b373e9a | 862 | // loop over the its subdetectors |
b21c1af0 | 863 | Int_t nSPDmodules=AliITSgeomTGeo::GetModuleIndex(3,1,1); |
864 | for (Int_t iIts=0; iIts < nSPDmodules; iIts++) { | |
865 | itsClusters=rpcont->UncheckedGetClusters(iIts); | |
9b373e9a | 866 | Int_t nClusters = itsClusters->GetEntriesFast(); |
867 | ||
868 | // number of clusters in each chip of the current module | |
869 | Int_t nClustersInChip[5] = {0,0,0,0,0}; | |
870 | Int_t layer = 0; | |
871 | ||
872 | // loop over clusters | |
873 | while(nClusters--) { | |
874 | AliITSRecPoint* cluster = (AliITSRecPoint*)itsClusters->UncheckedAt(nClusters); | |
875 | ||
876 | layer = cluster->GetLayer(); | |
877 | if (layer>1) continue; | |
878 | ||
879 | // find the chip for the current cluster | |
880 | Float_t locz = cluster->GetDetLocalZ(); | |
b21c1af0 | 881 | Int_t iChip = seg.GetChipFromLocal(0,locz); |
9b373e9a | 882 | nClustersInChip[iChip]++; |
883 | ||
884 | }// end of cluster loop | |
885 | ||
886 | // get number of fired chips in the current module | |
9b373e9a | 887 | for(Int_t ifChip=0; ifChip<5; ifChip++) { |
888 | if(nClustersInChip[ifChip] >= 1) fNFiredChips[layer]++; | |
889 | } | |
890 | ||
891 | } // end of its "subdetector" loop | |
892 | ||
b21c1af0 | 893 | |
9b373e9a | 894 | AliDebug(1,Form("(cluster-fired chips in layer 1 : %d, layer 2: %d)",fNFiredChips[0],fNFiredChips[1])); |
ac903f1b | 895 | } |
896 | //____________________________________________________________________ | |
897 | void | |
898 | AliITSMultReconstructor::SaveHists() { | |
3ef75756 | 899 | // This method save the histograms on the output file |
900 | // (only if fHistOn is TRUE). | |
ac903f1b | 901 | |
902 | if (!fHistOn) | |
903 | return; | |
904 | ||
ddced3c8 | 905 | fhClustersDPhiAll->Write(); |
906 | fhClustersDThetaAll->Write(); | |
ac903f1b | 907 | fhDPhiVsDThetaAll->Write(); |
ddced3c8 | 908 | |
909 | fhClustersDPhiAcc->Write(); | |
910 | fhClustersDThetaAcc->Write(); | |
ac903f1b | 911 | fhDPhiVsDThetaAcc->Write(); |
ddced3c8 | 912 | |
913 | fhetaTracklets->Write(); | |
914 | fhphiTracklets->Write(); | |
915 | fhetaClustersLay1->Write(); | |
916 | fhphiClustersLay1->Write(); | |
ac903f1b | 917 | } |
7b116aa1 | 918 | |
919 | //____________________________________________________________________ | |
920 | void | |
921 | AliITSMultReconstructor::FlagClustersInOverlapRegions (Int_t iC1, Int_t iC2WithBestDist) { | |
922 | ||
923 | Float_t distClSameMod=0.; | |
924 | Float_t distClSameModMin=0.; | |
925 | Int_t iClOverlap =0; | |
926 | Float_t meanRadiusLay1 = 3.99335; // average radius inner layer | |
927 | Float_t meanRadiusLay2 = 7.37935; // average radius outer layer; | |
928 | ||
929 | Float_t zproj1=0.; | |
930 | Float_t zproj2=0.; | |
931 | Float_t deZproj=0.; | |
1f9831ab | 932 | Float_t* clPar1 = GetClusterLayer1(iC1); |
933 | Float_t* clPar2B = GetClusterLayer2(iC2WithBestDist); | |
7b116aa1 | 934 | // Loop on inner layer clusters |
935 | for (Int_t iiC1=0; iiC1<fNClustersLay1; iiC1++) { | |
936 | if (!fOverlapFlagClustersLay1[iiC1]) { | |
937 | // only for adjacent modules | |
938 | if ((TMath::Abs(fDetectorIndexClustersLay1[iC1]-fDetectorIndexClustersLay1[iiC1])==4)|| | |
939 | (TMath::Abs(fDetectorIndexClustersLay1[iC1]-fDetectorIndexClustersLay1[iiC1])==76)) { | |
1f9831ab | 940 | Float_t *clPar11 = GetClusterLayer1(iiC1); |
941 | Float_t dePhi=TMath::Abs(clPar11[kClPh]-clPar1[kClPh]); | |
7b116aa1 | 942 | if (dePhi>TMath::Pi()) dePhi=2.*TMath::Pi()-dePhi; |
943 | ||
1f9831ab | 944 | zproj1=meanRadiusLay1/TMath::Tan(clPar1[kClTh]); |
945 | zproj2=meanRadiusLay1/TMath::Tan(clPar11[kClTh]); | |
7b116aa1 | 946 | |
947 | deZproj=TMath::Abs(zproj1-zproj2); | |
948 | ||
949 | distClSameMod = TMath::Sqrt(TMath::Power(deZproj/fZetaOverlapCut,2)+TMath::Power(dePhi/fPhiOverlapCut,2)); | |
950 | if (distClSameMod<=1.) fOverlapFlagClustersLay1[iiC1]=kTRUE; | |
951 | ||
952 | // if (distClSameMod<=1.) { | |
953 | // if (distClSameModMin==0. || distClSameMod<distClSameModMin) { | |
954 | // distClSameModMin=distClSameMod; | |
955 | // iClOverlap=iiC1; | |
956 | // } | |
957 | // } | |
958 | ||
959 | ||
960 | } // end adjacent modules | |
961 | } | |
962 | } // end Loop on inner layer clusters | |
963 | ||
964 | // if (distClSameModMin!=0.) fOverlapFlagClustersLay1[iClOverlap]=kTRUE; | |
965 | ||
966 | distClSameMod=0.; | |
967 | distClSameModMin=0.; | |
968 | iClOverlap =0; | |
969 | // Loop on outer layer clusters | |
970 | for (Int_t iiC2=0; iiC2<fNClustersLay2; iiC2++) { | |
971 | if (!fOverlapFlagClustersLay2[iiC2]) { | |
972 | // only for adjacent modules | |
1f9831ab | 973 | Float_t *clPar2 = GetClusterLayer2(iiC2); |
7b116aa1 | 974 | if ((TMath::Abs(fDetectorIndexClustersLay2[iC2WithBestDist]-fDetectorIndexClustersLay2[iiC2])==4) || |
975 | (TMath::Abs(fDetectorIndexClustersLay2[iC2WithBestDist]-fDetectorIndexClustersLay2[iiC2])==156)) { | |
1f9831ab | 976 | Float_t dePhi=TMath::Abs(clPar2[kClPh]-clPar2B[kClPh]); |
7b116aa1 | 977 | if (dePhi>TMath::Pi()) dePhi=2.*TMath::Pi()-dePhi; |
978 | ||
1f9831ab | 979 | zproj1=meanRadiusLay2/TMath::Tan(clPar2B[kClTh]); |
980 | zproj2=meanRadiusLay2/TMath::Tan(clPar2[kClTh]); | |
7b116aa1 | 981 | |
982 | deZproj=TMath::Abs(zproj1-zproj2); | |
983 | distClSameMod = TMath::Sqrt(TMath::Power(deZproj/fZetaOverlapCut,2)+TMath::Power(dePhi/fPhiOverlapCut,2)); | |
984 | if (distClSameMod<=1.) fOverlapFlagClustersLay2[iiC2]=kTRUE; | |
985 | ||
986 | // if (distClSameMod<=1.) { | |
987 | // if (distClSameModMin==0. || distClSameMod<distClSameModMin) { | |
988 | // distClSameModMin=distClSameMod; | |
989 | // iClOverlap=iiC2; | |
990 | // } | |
991 | // } | |
992 | ||
993 | } // end adjacent modules | |
994 | } | |
995 | } // end Loop on outer layer clusters | |
996 | ||
997 | // if (distClSameModMin!=0.) fOverlapFlagClustersLay2[iClOverlap]=kTRUE; | |
998 | ||
6b489238 | 999 | } |
1f9831ab | 1000 | |
1001 | //____________________________________________________________________ | |
1002 | void AliITSMultReconstructor::ProcessESDTracks() | |
1003 | { | |
1004 | // Flag the clusters used by ESD tracks | |
1005 | // Flag primary tracks to be used for multiplicity counting | |
1006 | // | |
6873ed43 | 1007 | if (!fESDEvent) return; |
1f9831ab | 1008 | AliESDVertex* vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexTracks(); |
1009 | if (!vtx) vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexSPD(); | |
1010 | if (!vtx) { | |
1011 | AliDebug(1,"No primary vertex: cannot flag primary tracks"); | |
1012 | return; | |
1013 | } | |
1014 | Int_t ntracks = fESDEvent->GetNumberOfTracks(); | |
1015 | for(Int_t itr=0; itr<ntracks; itr++) { | |
1016 | AliESDtrack* track = fESDEvent->GetTrack(itr); | |
1017 | if (!track->IsOn(AliESDtrack::kITSin)) continue; // use only tracks propagated in ITS to vtx | |
1018 | FlagTrackClusters(track); | |
6de485aa | 1019 | FlagIfSecondary(track,vtx); |
1f9831ab | 1020 | } |
6de485aa | 1021 | FlagV0s(vtx); |
1f9831ab | 1022 | // |
1023 | } | |
1024 | ||
1025 | //____________________________________________________________________ | |
1026 | void AliITSMultReconstructor::FlagTrackClusters(const AliESDtrack* track) | |
1027 | { | |
1028 | // RS: flag the SPD clusters of the track if it is useful for the multiplicity estimation | |
1029 | // | |
1030 | Int_t idx[12]; | |
1031 | if ( track->GetITSclusters(idx)<3 ) return; // at least 3 clusters must be used in the fit | |
1032 | // | |
1033 | char mark = track->IsOn(AliESDtrack::kITSpureSA) ? kITSSAPBit : kITSTPCBit; | |
1034 | char *uClus[2] = {fUsedClusLay1,fUsedClusLay2}; | |
1035 | for (int i=AliESDfriendTrack::kMaxITScluster;i--;) { | |
1036 | // note: i>=6 is for extra clusters | |
1037 | if (idx[i]<0) continue; | |
1038 | int layID= (idx[i] & 0xf0000000) >> 28; | |
1039 | if (layID>1) continue; // SPD only | |
1040 | int clID = (idx[i] & 0x0fffffff); | |
1041 | uClus[layID][clID] |= mark; | |
1042 | } | |
1043 | // | |
1044 | } | |
1045 | ||
1046 | //____________________________________________________________________ | |
6de485aa | 1047 | void AliITSMultReconstructor::FlagIfSecondary(AliESDtrack* track, const AliVertex* vtx) |
1f9831ab | 1048 | { |
1049 | // RS: check if the track is primary and set the flag | |
6de485aa | 1050 | double cut = (track->HasPointOnITSLayer(0)||track->HasPointOnITSLayer(1)) ? fCutPxDrSPDin:fCutPxDrSPDout; |
1051 | float xz[2]; | |
1052 | track->GetDZ(vtx->GetX(),vtx->GetY(),vtx->GetZ(), fESDEvent->GetMagneticField(), xz); | |
1053 | if (TMath::Abs(xz[0]*track->P())>cut || TMath::Abs(xz[1]*track->P())>fCutPxDz || | |
1054 | TMath::Abs(xz[0])>fCutDCArz || TMath::Abs(xz[1])>fCutDCArz) | |
1055 | track->SetStatus(AliESDtrack::kMultSec); | |
1056 | else track->ResetStatus(AliESDtrack::kMultSec); | |
1057 | } | |
1058 | ||
1059 | //____________________________________________________________________ | |
1060 | void AliITSMultReconstructor::FlagV0s(const AliESDVertex *vtx) | |
1061 | { | |
1062 | // flag tracks belonging to v0s | |
1063 | // | |
1064 | const double kK0Mass = 0.4976; | |
1065 | // | |
1066 | AliV0 pvertex; | |
1067 | AliKFVertex vertexKF; | |
1068 | AliKFParticle epKF0,epKF1,pipmKF0,piKF0,piKF1,gammaKF,k0KF; | |
1069 | Double_t mass,massErr,chi2c; | |
1070 | enum {kKFIni=BIT(14)}; | |
1071 | // | |
1072 | double recVtx[3]; | |
1073 | float recVtxF[3]; | |
1074 | vtx->GetXYZ(recVtx); | |
1075 | for (int i=3;i--;) recVtxF[i] = recVtx[i]; | |
1076 | // | |
1077 | int ntracks = fESDEvent->GetNumberOfTracks(); | |
1078 | if (ntracks<2) return; | |
1079 | // | |
1080 | vertexKF.X() = recVtx[0]; | |
1081 | vertexKF.Y() = recVtx[1]; | |
1082 | vertexKF.Z() = recVtx[2]; | |
1083 | vertexKF.Covariance(0,0) = vtx->GetXRes()*vtx->GetXRes(); | |
1084 | vertexKF.Covariance(1,2) = vtx->GetYRes()*vtx->GetYRes(); | |
1085 | vertexKF.Covariance(2,2) = vtx->GetZRes()*vtx->GetZRes(); | |
1086 | // | |
1087 | AliESDtrack *trc0,*trc1; | |
1088 | for (int it0=0;it0<ntracks;it0++) { | |
1089 | trc0 = fESDEvent->GetTrack(it0); | |
1090 | if (trc0->IsOn(AliESDtrack::kMultInV0)) continue; | |
1091 | if (!trc0->IsOn(AliESDtrack::kITSin)) continue; | |
1092 | Bool_t isSAP = trc0->IsPureITSStandalone(); | |
1093 | Int_t q0 = trc0->Charge(); | |
1094 | Bool_t testGamma = CanBeElectron(trc0); | |
1095 | epKF0.ResetBit(kKFIni); | |
1096 | piKF0.ResetBit(kKFIni); | |
1097 | double bestChi2=1e16; | |
1098 | int bestID = -1; | |
1099 | // | |
1100 | for (int it1=it0+1;it1<ntracks;it1++) { | |
1101 | trc1 = fESDEvent->GetTrack(it1); | |
1102 | if (trc1->IsOn(AliESDtrack::kMultInV0)) continue; | |
1103 | if (!trc1->IsOn(AliESDtrack::kITSin)) continue; | |
1104 | if (trc1->IsPureITSStandalone() != isSAP) continue; // pair separately ITS_SA_Pure tracks and TPC/ITS+ITS_SA | |
1105 | if ( (q0+trc1->Charge())!=0 ) continue; // don't pair like signs | |
1106 | // | |
1107 | pvertex.SetParamN(q0<0 ? *trc0:*trc1); | |
1108 | pvertex.SetParamP(q0>0 ? *trc0:*trc1); | |
1109 | pvertex.Update(recVtxF); | |
1110 | if (pvertex.P()<fCutMinP) continue; | |
1111 | if (pvertex.GetV0CosineOfPointingAngle()<fCutMinPointAngle) continue; | |
1112 | if (pvertex.GetDcaV0Daughters()>fCutMaxDCADauther) continue; | |
1113 | double d = pvertex.GetD(recVtx[0],recVtx[1],recVtx[2]); | |
1114 | if (d>fCutMaxDCA) continue; | |
1115 | double dx=recVtx[0]-pvertex.Xv(), dy=recVtx[1]-pvertex.Yv(); | |
1116 | double rv = TMath::Sqrt(dx*dx+dy*dy); | |
1117 | // | |
1118 | // check gamma conversion hypothesis ----------------------------------------------------------->>> | |
1119 | Bool_t gammaOK = kFALSE; | |
1120 | while (testGamma && CanBeElectron(trc1)) { | |
1121 | if (rv<fCutMinRGamma) break; | |
1122 | if (!epKF0.TestBit(kKFIni)) { | |
1123 | new(&epKF0) AliKFParticle(*trc0,q0>0 ? kPositron:kElectron); | |
1124 | epKF0.SetBit(kKFIni); | |
1125 | } | |
1126 | new(&epKF1) AliKFParticle(*trc1,q0<0 ? kPositron:kElectron); | |
1127 | gammaKF.Initialize(); | |
1128 | gammaKF += epKF0; | |
1129 | gammaKF += epKF1; | |
1130 | gammaKF.SetProductionVertex(vertexKF); | |
1131 | gammaKF.GetMass(mass,massErr); | |
1132 | if (mass>fCutMassGamma || (massErr>0&&(mass>massErr*fCutMassGammaNSigma))) break; | |
1133 | if (gammaKF.GetS()<fCutGammaSFromDecay) break; | |
1134 | gammaKF.SetMassConstraint(0.,0.001); | |
1135 | chi2c = (gammaKF.GetNDF()!=0) ? gammaKF.GetChi2()/gammaKF.GetNDF() : 1000; | |
1136 | if (chi2c>fCutChi2cGamma) break; | |
1137 | gammaOK = kTRUE; | |
1138 | if (chi2c>bestChi2) break; | |
1139 | bestChi2 = chi2c; | |
1140 | bestID = it1; | |
1141 | break; | |
1142 | } | |
1143 | if (gammaOK) continue; | |
1144 | // check gamma conversion hypothesis -----------------------------------------------------------<<< | |
1145 | // check K0 conversion hypothesis ----------------------------------------------------------->>> | |
1146 | while (1) { | |
1147 | if (rv<fCutMinRK0) break; | |
1148 | if (!piKF0.TestBit(kKFIni)) { | |
1149 | new(&piKF0) AliKFParticle(*trc0,q0>0 ? kPiPlus:kPiMinus); | |
1150 | piKF0.SetBit(kKFIni); | |
1151 | } | |
1152 | new(&piKF1) AliKFParticle(*trc1,q0<0 ? kPiPlus:kPiMinus); | |
1153 | k0KF.Initialize(); | |
1154 | k0KF += piKF0; | |
1155 | k0KF += piKF1; | |
1156 | k0KF.SetProductionVertex(vertexKF); | |
1157 | k0KF.GetMass(mass,massErr); | |
1158 | mass -= kK0Mass; | |
1159 | if (TMath::Abs(mass)>fCutMassK0 || (massErr>0&&(abs(mass)>massErr*fCutMassK0NSigma))) break; | |
1160 | if (k0KF.GetS()<fCutK0SFromDecay) break; | |
1161 | k0KF.SetMassConstraint(kK0Mass,0.001); | |
1162 | chi2c = (k0KF.GetNDF()!=0) ? k0KF.GetChi2()/k0KF.GetNDF() : 1000; | |
1163 | if (chi2c>fCutChi2cK0) break; | |
1164 | if (chi2c>bestChi2) break; | |
1165 | bestChi2 = chi2c; | |
1166 | bestID = it1; | |
1167 | break; | |
1168 | } | |
1169 | // check K0 conversion hypothesis -----------------------------------------------------------<<< | |
1170 | } | |
1171 | // | |
1172 | if (bestID>=0) { | |
1173 | trc0->SetStatus(AliESDtrack::kMultInV0); | |
1174 | fESDEvent->GetTrack(bestID)->SetStatus(AliESDtrack::kMultInV0); | |
1175 | } | |
1176 | } | |
1177 | // | |
1178 | } | |
1179 | ||
1180 | //____________________________________________________________________ | |
1181 | Bool_t AliITSMultReconstructor::CanBeElectron(const AliESDtrack* trc) const | |
1182 | { | |
1183 | // check if the track can be electron | |
1184 | Double_t pid[AliPID::kSPECIES]; | |
1185 | if (!trc->IsOn(AliESDtrack::kESDpid)) return kTRUE; | |
1186 | trc->GetESDpid(pid); | |
1187 | return (trc->IsOn(AliESDtrack::kTPCpid)) ? | |
1188 | pid[AliPID::kElectron]>fCutMinElectronProbTPC : | |
1189 | pid[AliPID::kElectron]>fCutMinElectronProbESD; | |
1190 | // | |
1f9831ab | 1191 | } |
6de485aa | 1192 |