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11ba093e | 1 | /************************************************************************** |
2 | * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. * | |
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 | ||
16 | //_________________________________________________________________________ | |
17 | // | |
18 | // Implementation of the ITS-SPD trackleter class | |
19 | // Clone version of the AliITSMultReconstructor class (October 2010) | |
20 | // that can be used in an AliAnalysisTask | |
21 | // | |
22 | // Support and development: | |
23 | // Domenico Elia, Maria Nicassio (INFN Bari) | |
24 | // Domenico.Elia@ba.infn.it, Maria.Nicassio@ba.infn.it | |
25 | // | |
26 | //_________________________________________________________________________ | |
27 | ||
28 | #include <TClonesArray.h> | |
29 | #include <TH1F.h> | |
30 | #include <TH2F.h> | |
31 | #include <TTree.h> | |
32 | #include <TBits.h> | |
33 | #include <TArrayI.h> | |
34 | ||
35 | #include "AliTrackletAlg.h" | |
36 | #include "../ITS/AliITSReconstructor.h" | |
37 | #include "../ITS/AliITSsegmentationSPD.h" | |
38 | #include "../ITS/AliITSRecPoint.h" | |
39 | #include "../ITS/AliITSRecPointContainer.h" | |
40 | #include "../ITS/AliITSgeom.h" | |
41 | #include "../ITS/AliITSgeomTGeo.h" | |
42 | #include "../ITS/AliITSDetTypeRec.h" | |
43 | #include "AliESDEvent.h" | |
44 | #include "AliESDVertex.h" | |
45 | #include "AliESDtrack.h" | |
46 | #include "AliMultiplicity.h" | |
47 | #include "AliLog.h" | |
48 | #include "TGeoGlobalMagField.h" | |
49 | #include "AliMagF.h" | |
50 | #include "AliESDv0.h" | |
51 | #include "AliV0.h" | |
52 | #include "AliKFParticle.h" | |
53 | #include "AliKFVertex.h" | |
54 | ||
55 | //____________________________________________________________________ | |
56 | ClassImp(AliTrackletAlg) | |
57 | ||
58 | ||
59 | //____________________________________________________________________ | |
60 | AliTrackletAlg::AliTrackletAlg(): | |
61 | fDetTypeRec(0),fESDEvent(0),fTreeRP(0),fUsedClusLay1(0),fUsedClusLay2(0), | |
62 | fClustersLay1(0), | |
63 | fClustersLay2(0), | |
64 | fDetectorIndexClustersLay1(0), | |
65 | fDetectorIndexClustersLay2(0), | |
66 | fOverlapFlagClustersLay1(0), | |
67 | fOverlapFlagClustersLay2(0), | |
68 | fTracklets(0), | |
69 | fSClusters(0), | |
70 | fNClustersLay1(0), | |
71 | fNClustersLay2(0), | |
72 | fNTracklets(0), | |
73 | fNSingleCluster(0), | |
74 | fPhiWindow(0), | |
75 | fThetaWindow(0), | |
76 | fPhiShift(0), | |
77 | fRemoveClustersFromOverlaps(0), | |
78 | fPhiOverlapCut(0), | |
79 | fZetaOverlapCut(0), | |
80 | fPhiRotationAngle(0), | |
81 | // | |
82 | fCutPxDrSPDin(0.1), | |
83 | fCutPxDrSPDout(0.15), | |
84 | fCutPxDz(0.2), | |
85 | fCutDCArz(0.5), | |
86 | fCutMinElectronProbTPC(0.5), | |
87 | fCutMinElectronProbESD(0.1), | |
88 | fCutMinP(0.05), | |
89 | fCutMinRGamma(2.), | |
90 | fCutMinRK0(1.), | |
91 | fCutMinPointAngle(0.98), | |
92 | fCutMaxDCADauther(0.5), | |
93 | fCutMassGamma(0.03), | |
94 | fCutMassGammaNSigma(5.), | |
95 | fCutMassK0(0.03), | |
96 | fCutMassK0NSigma(5.), | |
97 | fCutChi2cGamma(2.), | |
98 | fCutChi2cK0(2.), | |
99 | fCutGammaSFromDecay(-10.), | |
100 | fCutK0SFromDecay(-10.), | |
101 | fCutMaxDCA(1.), | |
102 | // | |
103 | fHistOn(0), | |
104 | fhClustersDPhiAcc(0), | |
105 | fhClustersDThetaAcc(0), | |
106 | fhClustersDPhiAll(0), | |
107 | fhClustersDThetaAll(0), | |
108 | fhDPhiVsDThetaAll(0), | |
109 | fhDPhiVsDThetaAcc(0), | |
110 | fhetaTracklets(0), | |
111 | fhphiTracklets(0), | |
112 | fhetaClustersLay1(0), | |
113 | fhphiClustersLay1(0){ | |
114 | ||
115 | fNFiredChips[0] = 0; | |
116 | fNFiredChips[1] = 0; | |
117 | // Method to reconstruct the charged particles multiplicity with the | |
118 | // SPD (tracklets). | |
119 | ||
120 | SetHistOn(); | |
121 | ||
122 | if(AliITSReconstructor::GetRecoParam()) { | |
123 | SetPhiWindow(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiWindow()); | |
124 | SetThetaWindow(AliITSReconstructor::GetRecoParam()->GetTrackleterThetaWindow()); | |
125 | SetPhiShift(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiShift()); | |
126 | SetRemoveClustersFromOverlaps(AliITSReconstructor::GetRecoParam()->GetTrackleterRemoveClustersFromOverlaps()); | |
127 | SetPhiOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiOverlapCut()); | |
128 | SetZetaOverlapCut(AliITSReconstructor::GetRecoParam()->GetTrackleterZetaOverlapCut()); | |
129 | SetPhiRotationAngle(AliITSReconstructor::GetRecoParam()->GetTrackleterPhiRotationAngle()); | |
130 | // | |
131 | SetCutPxDrSPDin(AliITSReconstructor::GetRecoParam()->GetMultCutPxDrSPDin()); | |
132 | SetCutPxDrSPDout(AliITSReconstructor::GetRecoParam()->GetMultCutPxDrSPDout()); | |
133 | SetCutPxDz(AliITSReconstructor::GetRecoParam()->GetMultCutPxDz()); | |
134 | SetCutDCArz(AliITSReconstructor::GetRecoParam()->GetMultCutDCArz()); | |
135 | SetCutMinElectronProbTPC(AliITSReconstructor::GetRecoParam()->GetMultCutMinElectronProbTPC()); | |
136 | SetCutMinElectronProbESD(AliITSReconstructor::GetRecoParam()->GetMultCutMinElectronProbESD()); | |
137 | SetCutMinP(AliITSReconstructor::GetRecoParam()->GetMultCutMinP()); | |
138 | SetCutMinRGamma(AliITSReconstructor::GetRecoParam()->GetMultCutMinRGamma()); | |
139 | SetCutMinRK0(AliITSReconstructor::GetRecoParam()->GetMultCutMinRK0()); | |
140 | SetCutMinPointAngle(AliITSReconstructor::GetRecoParam()->GetMultCutMinPointAngle()); | |
141 | SetCutMaxDCADauther(AliITSReconstructor::GetRecoParam()->GetMultCutMaxDCADauther()); | |
142 | SetCutMassGamma(AliITSReconstructor::GetRecoParam()->GetMultCutMassGamma()); | |
143 | SetCutMassGammaNSigma(AliITSReconstructor::GetRecoParam()->GetMultCutMassGammaNSigma()); | |
144 | SetCutMassK0(AliITSReconstructor::GetRecoParam()->GetMultCutMassK0()); | |
145 | SetCutMassK0NSigma(AliITSReconstructor::GetRecoParam()->GetMultCutMassK0NSigma()); | |
146 | SetCutChi2cGamma(AliITSReconstructor::GetRecoParam()->GetMultCutChi2cGamma()); | |
147 | SetCutChi2cK0(AliITSReconstructor::GetRecoParam()->GetMultCutChi2cK0()); | |
148 | SetCutGammaSFromDecay(AliITSReconstructor::GetRecoParam()->GetMultCutGammaSFromDecay()); | |
149 | SetCutK0SFromDecay(AliITSReconstructor::GetRecoParam()->GetMultCutK0SFromDecay()); | |
150 | SetCutMaxDCA(AliITSReconstructor::GetRecoParam()->GetMultCutMaxDCA()); | |
151 | // | |
152 | } else { | |
153 | SetPhiWindow(); | |
154 | SetThetaWindow(); | |
155 | SetPhiShift(); | |
156 | SetRemoveClustersFromOverlaps(); | |
157 | SetPhiOverlapCut(); | |
158 | SetZetaOverlapCut(); | |
159 | SetPhiRotationAngle(); | |
160 | ||
161 | // | |
162 | SetCutPxDrSPDin(); | |
163 | SetCutPxDrSPDout(); | |
164 | SetCutPxDz(); | |
165 | SetCutDCArz(); | |
166 | SetCutMinElectronProbTPC(); | |
167 | SetCutMinElectronProbESD(); | |
168 | SetCutMinP(); | |
169 | SetCutMinRGamma(); | |
170 | SetCutMinRK0(); | |
171 | SetCutMinPointAngle(); | |
172 | SetCutMaxDCADauther(); | |
173 | SetCutMassGamma(); | |
174 | SetCutMassGammaNSigma(); | |
175 | SetCutMassK0(); | |
176 | SetCutMassK0NSigma(); | |
177 | SetCutChi2cGamma(); | |
178 | SetCutChi2cK0(); | |
179 | SetCutGammaSFromDecay(); | |
180 | SetCutK0SFromDecay(); | |
181 | SetCutMaxDCA(); | |
182 | } | |
183 | ||
184 | fClustersLay1 = 0; | |
185 | fClustersLay2 = 0; | |
186 | fDetectorIndexClustersLay1 = 0; | |
187 | fDetectorIndexClustersLay2 = 0; | |
188 | fOverlapFlagClustersLay1 = 0; | |
189 | fOverlapFlagClustersLay2 = 0; | |
190 | fTracklets = 0; | |
191 | fSClusters = 0; | |
192 | ||
193 | // definition of histograms | |
194 | Bool_t oldStatus = TH1::AddDirectoryStatus(); | |
195 | TH1::AddDirectory(kFALSE); | |
196 | ||
197 | fhClustersDPhiAcc = new TH1F("dphiacc", "dphi", 100,-0.1,0.1); | |
198 | fhClustersDThetaAcc = new TH1F("dthetaacc","dtheta",100,-0.1,0.1); | |
199 | ||
200 | fhDPhiVsDThetaAcc = new TH2F("dphiVsDthetaAcc","",100,-0.1,0.1,100,-0.1,0.1); | |
201 | ||
202 | fhClustersDPhiAll = new TH1F("dphiall", "dphi", 100,0.0,0.5); | |
203 | fhClustersDThetaAll = new TH1F("dthetaall","dtheta",100,0.0,0.5); | |
204 | ||
205 | fhDPhiVsDThetaAll = new TH2F("dphiVsDthetaAll","",100,0.,0.5,100,0.,0.5); | |
206 | ||
207 | fhetaTracklets = new TH1F("etaTracklets", "eta", 100,-2.,2.); | |
208 | fhphiTracklets = new TH1F("phiTracklets", "phi", 100, 0., 2*TMath::Pi()); | |
209 | fhetaClustersLay1 = new TH1F("etaClustersLay1", "etaCl1", 100,-2.,2.); | |
210 | fhphiClustersLay1 = new TH1F("phiClustersLay1", "phiCl1", 100, 0., 2*TMath::Pi()); | |
211 | ||
212 | TH1::AddDirectory(oldStatus); | |
213 | } | |
214 | ||
215 | //______________________________________________________________________ | |
216 | AliTrackletAlg::AliTrackletAlg(const AliTrackletAlg &mr) : | |
217 | AliTrackleter(mr), | |
218 | fDetTypeRec(0),fESDEvent(0),fTreeRP(0),fUsedClusLay1(0),fUsedClusLay2(0), | |
219 | fClustersLay1(0), | |
220 | fClustersLay2(0), | |
221 | fDetectorIndexClustersLay1(0), | |
222 | fDetectorIndexClustersLay2(0), | |
223 | fOverlapFlagClustersLay1(0), | |
224 | fOverlapFlagClustersLay2(0), | |
225 | fTracklets(0), | |
226 | fSClusters(0), | |
227 | fNClustersLay1(0), | |
228 | fNClustersLay2(0), | |
229 | fNTracklets(0), | |
230 | fNSingleCluster(0), | |
231 | fPhiWindow(0), | |
232 | fThetaWindow(0), | |
233 | fPhiShift(0), | |
234 | fRemoveClustersFromOverlaps(0), | |
235 | fPhiOverlapCut(0), | |
236 | fZetaOverlapCut(0), | |
237 | fPhiRotationAngle(0), | |
238 | // | |
239 | fCutPxDrSPDin(0.1), | |
240 | fCutPxDrSPDout(0.15), | |
241 | fCutPxDz(0.2), | |
242 | fCutDCArz(0.5), | |
243 | fCutMinElectronProbTPC(0.5), | |
244 | fCutMinElectronProbESD(0.1), | |
245 | fCutMinP(0.05), | |
246 | fCutMinRGamma(2.), | |
247 | fCutMinRK0(1.), | |
248 | fCutMinPointAngle(0.98), | |
249 | fCutMaxDCADauther(0.5), | |
250 | fCutMassGamma(0.03), | |
251 | fCutMassGammaNSigma(5.), | |
252 | fCutMassK0(0.03), | |
253 | fCutMassK0NSigma(5.), | |
254 | fCutChi2cGamma(2.), | |
255 | fCutChi2cK0(2.), | |
256 | fCutGammaSFromDecay(-10.), | |
257 | fCutK0SFromDecay(-10.), | |
258 | fCutMaxDCA(1.), | |
259 | // | |
260 | fHistOn(0), | |
261 | fhClustersDPhiAcc(0), | |
262 | fhClustersDThetaAcc(0), | |
263 | fhClustersDPhiAll(0), | |
264 | fhClustersDThetaAll(0), | |
265 | fhDPhiVsDThetaAll(0), | |
266 | fhDPhiVsDThetaAcc(0), | |
267 | fhetaTracklets(0), | |
268 | fhphiTracklets(0), | |
269 | fhetaClustersLay1(0), | |
270 | fhphiClustersLay1(0) | |
271 | { | |
272 | // Copy constructor :!!! RS ATTENTION: old c-tor reassigned the pointers instead of creating a new copy -> would crash on delete | |
273 | AliError("May not use"); | |
274 | } | |
275 | ||
276 | //______________________________________________________________________ | |
277 | AliTrackletAlg& AliTrackletAlg::operator=(const AliTrackletAlg& mr){ | |
278 | // Assignment operator | |
279 | if (this != &mr) { | |
280 | this->~AliTrackletAlg(); | |
281 | new(this) AliTrackletAlg(mr); | |
282 | } | |
283 | return *this; | |
284 | } | |
285 | ||
286 | //______________________________________________________________________ | |
287 | AliTrackletAlg::~AliTrackletAlg(){ | |
288 | // Destructor | |
289 | ||
290 | // delete histograms | |
291 | delete fhClustersDPhiAcc; | |
292 | delete fhClustersDThetaAcc; | |
293 | delete fhClustersDPhiAll; | |
294 | delete fhClustersDThetaAll; | |
295 | delete fhDPhiVsDThetaAll; | |
296 | delete fhDPhiVsDThetaAcc; | |
297 | delete fhetaTracklets; | |
298 | delete fhphiTracklets; | |
299 | delete fhetaClustersLay1; | |
300 | delete fhphiClustersLay1; | |
301 | delete[] fUsedClusLay1; | |
302 | delete[] fUsedClusLay2; | |
303 | // delete arrays | |
304 | for(Int_t i=0; i<fNTracklets; i++) | |
305 | delete [] fTracklets[i]; | |
306 | ||
307 | for(Int_t i=0; i<fNSingleCluster; i++) | |
308 | delete [] fSClusters[i]; | |
309 | ||
310 | delete [] fClustersLay1; | |
311 | delete [] fClustersLay2; | |
312 | delete [] fDetectorIndexClustersLay1; | |
313 | delete [] fDetectorIndexClustersLay2; | |
314 | delete [] fOverlapFlagClustersLay1; | |
315 | delete [] fOverlapFlagClustersLay2; | |
316 | delete [] fTracklets; | |
317 | delete [] fSClusters; | |
318 | } | |
319 | ||
320 | //____________________________________________________________________ | |
321 | void AliTrackletAlg::Reconstruct(AliESDEvent* esd, TTree* treeRP) | |
322 | { | |
323 | if (!treeRP) { AliError(" Invalid ITS cluster tree !\n"); return; } | |
324 | if (!esd) {AliError("ESDEvent is not available, use old reconstructor"); return;} | |
325 | // reset counters | |
326 | if (fMult) delete fMult; fMult = 0; | |
327 | fNClustersLay1 = 0; | |
328 | fNClustersLay2 = 0; | |
329 | fNTracklets = 0; | |
330 | fNSingleCluster = 0; | |
331 | // | |
332 | fESDEvent = esd; | |
333 | fTreeRP = treeRP; | |
334 | // | |
335 | // >>>> RS: this part is equivalent to former AliITSVertexer::FindMultiplicity | |
336 | // | |
337 | // see if there is a SPD vertex | |
338 | Bool_t isVtxOK=kTRUE, isCosmics=kFALSE; | |
339 | AliESDVertex* vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexSPD(); | |
340 | if (!vtx || vtx->GetNContributors()<1) isVtxOK = kFALSE; | |
341 | if (vtx && strstr(vtx->GetTitle(),"cosmics")) { | |
342 | isVtxOK = kFALSE; | |
343 | isCosmics = kTRUE; | |
344 | } | |
345 | // | |
346 | if (!isVtxOK) { | |
347 | if (!isCosmics) { | |
348 | AliDebug(1,"Tracklets multiplicity not determined because the primary vertex was not found"); | |
349 | AliDebug(1,"Just counting the number of cluster-fired chips on the SPD layers"); | |
350 | } | |
351 | vtx = 0; | |
352 | } | |
353 | if(vtx){ | |
2942f542 | 354 | float vtxf[3] = {static_cast<float>(vtx->GetX()),static_cast<float>(vtx->GetY()),static_cast<float>(vtx->GetZ())}; |
11ba093e | 355 | FindTracklets(vtxf); |
356 | } | |
357 | else { | |
358 | FindTracklets(0); | |
359 | } | |
360 | // | |
361 | CreateMultiplicityObject(); | |
362 | } | |
363 | ||
364 | //____________________________________________________________________ | |
365 | void AliTrackletAlg::Reconstruct(TTree* clusterTree, Float_t* vtx, Float_t* /* vtxRes*/) { | |
366 | // | |
367 | // RS NOTE - this is old reconstructor invocation, to be used from VertexFinder | |
368 | ||
369 | if (fMult) delete fMult; fMult = 0; | |
370 | fNClustersLay1 = 0; | |
371 | fNClustersLay2 = 0; | |
372 | fNTracklets = 0; | |
373 | fNSingleCluster = 0; | |
374 | // | |
375 | if (!clusterTree) { AliError(" Invalid ITS cluster tree !\n"); return; } | |
376 | // | |
377 | fESDEvent = 0; | |
378 | fTreeRP = clusterTree; | |
379 | // | |
380 | FindTracklets(vtx); | |
381 | // | |
382 | } | |
383 | ||
384 | //____________________________________________________________________ | |
385 | void AliTrackletAlg::FindTracklets(const Float_t *vtx) | |
386 | { | |
387 | // - calls LoadClusterArrays that finds the position of the clusters | |
388 | // (in global coord) | |
389 | ||
390 | // - convert the cluster coordinates to theta, phi (seen from the | |
391 | // interaction vertex). Clusters in the inner layer can be now | |
392 | // rotated for combinatorial studies | |
393 | // - makes an array of tracklets | |
394 | // | |
395 | // After this method has been called, the clusters of the two layers | |
396 | // and the tracklets can be retrieved by calling the Get'er methods. | |
397 | ||
398 | ||
399 | // Find tracklets converging to vertex | |
400 | // | |
401 | LoadClusterArrays(fTreeRP); | |
402 | ||
403 | // flag clusters used by ESD tracks | |
404 | if (fESDEvent) ProcessESDTracks(); | |
405 | ||
406 | if (!vtx) return; | |
407 | ||
408 | const Double_t pi = TMath::Pi(); | |
409 | Printf("pi %f",pi); | |
410 | // dPhi shift is field dependent | |
411 | // get average magnetic field | |
412 | Float_t bz = 0; | |
413 | AliMagF* field = 0; | |
414 | if (TGeoGlobalMagField::Instance()) field = dynamic_cast<AliMagF*>(TGeoGlobalMagField::Instance()->GetField()); | |
415 | if (!field) | |
416 | { | |
13242232 | 417 | AliError("Could not retrieve magnetic field. Assuming no field. Delta Phi shift will be deactivated in AliTrackletAlg."); |
11ba093e | 418 | } |
419 | else | |
420 | bz = TMath::Abs(field->SolenoidField()); | |
421 | ||
422 | const Double_t dPhiShift = fPhiShift / 5 * bz; | |
423 | AliDebug(1, Form("Using phi shift of %f", dPhiShift)); | |
424 | // Printf("dphishift... %f",dPhiShift); | |
425 | const Double_t dPhiWindow2 = fPhiWindow * fPhiWindow; | |
426 | // Printf("phiwin... %f",fPhiWindow); | |
427 | // Printf("thetawin... %f",fThetaWindow); | |
428 | // Printf("phirotangle... %f",fPhiRotationAngle); | |
429 | const Double_t dThetaWindow2 = fThetaWindow * fThetaWindow; | |
430 | // Printf("cl2... %d",fNClustersLay2); | |
431 | Int_t* partners = new Int_t[fNClustersLay2]; | |
432 | Float_t* minDists = new Float_t[fNClustersLay2]; | |
433 | Int_t* associatedLay1 = new Int_t[fNClustersLay1]; | |
434 | TArrayI** blacklist = new TArrayI*[fNClustersLay1]; | |
435 | // Printf("Vertex in find tracklets...%f %f %f",vtx[0],vtx[1],vtx[2]); | |
436 | for (Int_t i=0; i<fNClustersLay2; i++) { | |
437 | partners[i] = -1; | |
438 | minDists[i] = 2; | |
439 | } | |
440 | for (Int_t i=0; i<fNClustersLay1; i++) | |
441 | associatedLay1[i] = 0; | |
442 | for (Int_t i=0; i<fNClustersLay1; i++) | |
443 | blacklist[i] = 0; | |
444 | ||
445 | // Printf("Looking for tracklets..."); | |
446 | // find the tracklets | |
447 | AliDebug(1,"Looking for tracklets... "); | |
448 | ||
449 | //########################################################### | |
450 | // Loop on layer 1 : finding theta, phi and z | |
451 | for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) { | |
452 | // Printf("looping on cl 1..."); | |
453 | float *clPar = GetClusterLayer1(iC1); | |
454 | Float_t x = clPar[kClTh] - vtx[0]; | |
455 | Float_t y = clPar[kClPh] - vtx[1]; | |
456 | Float_t z = clPar[kClZ] - vtx[2]; | |
457 | ||
458 | Float_t r = TMath::Sqrt(x*x + y*y + z*z); | |
459 | ||
460 | clPar[kClTh] = TMath::ACos(z/r); // Store Theta | |
461 | clPar[kClPh] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi | |
462 | clPar[kClPh] = clPar[kClPh] + fPhiRotationAngle; //rotation of inner layer for comb studies | |
463 | // Printf("ClPar1 %f %f ", clPar[0],clPar[1]); | |
464 | if (fHistOn) { | |
465 | Float_t eta = clPar[kClTh]; | |
466 | eta= TMath::Tan(eta/2.); | |
467 | eta=-TMath::Log(eta); | |
468 | fhetaClustersLay1->Fill(eta); | |
469 | fhphiClustersLay1->Fill(clPar[kClPh]); | |
470 | } | |
471 | } | |
472 | ||
473 | // Loop on layer 2 : finding theta, phi and r | |
474 | for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) { | |
475 | float *clPar = GetClusterLayer2(iC2); | |
476 | Float_t x = clPar[kClTh] - vtx[0]; | |
477 | Float_t y = clPar[kClPh] - vtx[1]; | |
478 | Float_t z = clPar[kClZ] - vtx[2]; | |
479 | ||
480 | Float_t r = TMath::Sqrt(x*x + y*y + z*z); | |
481 | ||
482 | clPar[kClTh] = TMath::ACos(z/r); // Store Theta | |
483 | clPar[kClPh] = TMath::Pi() + TMath::ATan2(-y,-x); // Store Phi | |
484 | // Printf("ClPar2 %f %f ", clPar[0],clPar[1]); | |
485 | } | |
486 | ||
487 | //########################################################### | |
488 | Int_t found = 1; | |
489 | while (found > 0) { | |
490 | Printf("Found something..."); | |
491 | Printf("cl1...%d",fNClustersLay1); | |
492 | Printf("cl2...%d",fNClustersLay2); | |
493 | ||
494 | found = 0; | |
495 | ||
496 | // Step1: find all tracklets allowing double assocation | |
497 | // Loop on layer 1 | |
498 | for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) { | |
499 | // Printf("looping on cl 1..."); | |
500 | // already used ? | |
501 | if (associatedLay1[iC1] != 0) continue; | |
502 | ||
503 | found++; | |
504 | ||
505 | // reset of variables for multiple candidates | |
506 | Int_t iC2WithBestDist = -1; // reset | |
507 | Double_t minDist = 2; // reset | |
508 | float* clPar1 = GetClusterLayer1(iC1); | |
509 | // Printf("ClPar1 %f %f ", clPar1[0],clPar1[1]); | |
510 | ||
511 | // Loop on layer 2 | |
512 | for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) { | |
513 | // Printf("looping on cl 2..."); | |
514 | float* clPar2 = GetClusterLayer2(iC2); | |
515 | // Printf("ClPar2 %f %f ", clPar2[0],clPar2[1]); | |
516 | if (blacklist[iC1]) { | |
517 | Bool_t blacklisted = kFALSE; | |
518 | for (Int_t i=blacklist[iC1]->GetSize(); i--;) { | |
519 | if (blacklist[iC1]->At(i) == iC2) { | |
520 | blacklisted = kTRUE; | |
521 | break; | |
522 | } | |
523 | } | |
524 | if (blacklisted) continue; | |
525 | } | |
526 | ||
527 | // find the difference in angles | |
528 | Double_t dTheta = TMath::Abs(clPar2[kClTh] - clPar1[kClTh]); | |
529 | ||
530 | Double_t dPhi = TMath::Abs(clPar2[kClPh] - clPar1[kClPh]); | |
531 | // Printf("detheta %f ", dTheta); | |
532 | // Printf("dephi %f ", dPhi); | |
533 | ||
534 | // take into account boundary condition | |
535 | if (dPhi>pi) dPhi=2.*pi-dPhi; | |
536 | ||
537 | if (fHistOn) { | |
538 | fhClustersDPhiAll->Fill(dPhi); | |
539 | fhClustersDThetaAll->Fill(dTheta); | |
540 | fhDPhiVsDThetaAll->Fill(dTheta, dPhi); | |
541 | } | |
542 | ||
543 | dPhi -= dPhiShift; | |
544 | ||
545 | // make "elliptical" cut in Phi and Theta! | |
546 | Float_t d = dPhi*dPhi/dPhiWindow2 + dTheta*dTheta/dThetaWindow2; | |
547 | // Float_t d = dTheta*dTheta/dThetaWindow2; | |
548 | // Printf("distance %f",d); | |
549 | // look for the minimum distance: the minimum is in iC2WithBestDist | |
550 | if (d<1 && d<minDist) { | |
551 | minDist=d; | |
552 | iC2WithBestDist = iC2; | |
553 | } | |
554 | } // end of loop over clusters in layer 2 | |
555 | ||
556 | if (minDist<1) { // This means that a cluster in layer 2 was found that matches with iC1 | |
557 | ||
558 | if (minDists[iC2WithBestDist] > minDist) { | |
559 | Int_t oldPartner = partners[iC2WithBestDist]; | |
560 | partners[iC2WithBestDist] = iC1; | |
561 | minDists[iC2WithBestDist] = minDist; | |
562 | ||
563 | // mark as assigned | |
564 | associatedLay1[iC1] = 1; | |
565 | ||
566 | if (oldPartner != -1) { | |
567 | // redo partner search for cluster in L0 (oldPartner), putting this one (iC2WithBestDist) on its blacklist | |
568 | if (blacklist[oldPartner] == 0) { | |
569 | blacklist[oldPartner] = new TArrayI(1); | |
570 | } else blacklist[oldPartner]->Set(blacklist[oldPartner]->GetSize()+1); | |
571 | ||
572 | blacklist[oldPartner]->AddAt(iC2WithBestDist, blacklist[oldPartner]->GetSize()-1); | |
573 | ||
574 | // mark as free | |
575 | associatedLay1[oldPartner] = 0; | |
576 | } | |
577 | } else { | |
578 | // try again to find a cluster without considering iC2WithBestDist | |
579 | if (blacklist[iC1] == 0) { | |
580 | blacklist[iC1] = new TArrayI(1); | |
581 | } | |
582 | else | |
583 | blacklist[iC1]->Set(blacklist[iC1]->GetSize()+1); | |
584 | ||
585 | blacklist[iC1]->AddAt(iC2WithBestDist, blacklist[iC1]->GetSize()-1); | |
586 | } | |
587 | ||
588 | } else // cluster has no partner; remove | |
589 | associatedLay1[iC1] = 2; | |
590 | } // end of loop over clusters in layer 1 | |
591 | } | |
592 | ||
593 | // Step2: store tracklets; remove used clusters | |
594 | for (Int_t iC2=0; iC2<fNClustersLay2; iC2++) { | |
595 | ||
596 | if (partners[iC2] == -1) continue; | |
597 | ||
598 | if (fRemoveClustersFromOverlaps) FlagClustersInOverlapRegions (partners[iC2],iC2); | |
599 | Printf("saving tracklets"); | |
600 | ||
601 | if (fOverlapFlagClustersLay1[partners[iC2]] || fOverlapFlagClustersLay2[iC2]) continue; | |
602 | ||
603 | float* clPar2 = GetClusterLayer2(iC2); | |
604 | float* clPar1 = GetClusterLayer1(partners[iC2]); | |
605 | ||
606 | Float_t* tracklet = fTracklets[fNTracklets] = new Float_t[kTrNPar]; // RS Add also the cluster id's | |
607 | ||
608 | // use the theta from the clusters in the first layer | |
609 | tracklet[kTrTheta] = clPar1[kClTh]; | |
610 | // use the phi from the clusters in the first layer | |
611 | tracklet[kTrPhi] = clPar1[kClPh]; | |
612 | // store the difference between phi1 and phi2 | |
613 | tracklet[kTrDPhi] = clPar1[kClPh] - clPar2[kClPh]; | |
614 | ||
615 | // define dphi in the range [0,pi] with proper sign (track charge correlated) | |
616 | if (tracklet[kTrDPhi] > TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]-2.*TMath::Pi(); | |
617 | if (tracklet[kTrDPhi] < -TMath::Pi()) tracklet[kTrDPhi] = tracklet[kTrDPhi]+2.*TMath::Pi(); | |
618 | ||
619 | // store the difference between theta1 and theta2 | |
620 | tracklet[kTrDTheta] = clPar1[kClTh] - clPar2[kClTh]; | |
621 | ||
622 | if (fHistOn) { | |
623 | fhClustersDPhiAcc->Fill(tracklet[kTrDPhi]); | |
624 | fhClustersDThetaAcc->Fill(tracklet[kTrDTheta]); | |
625 | fhDPhiVsDThetaAcc->Fill(tracklet[kTrDTheta],tracklet[kTrDPhi]); | |
626 | } | |
627 | ||
628 | // find label | |
629 | // if equal label in both clusters found this label is assigned | |
630 | // if no equal label can be found the first labels of the L1 AND L2 cluster are assigned | |
631 | Int_t label1 = 0; | |
632 | Int_t label2 = 0; | |
633 | while (label2 < 3) { | |
634 | if ((Int_t) clPar1[kClMC0+label1] != -2 && (Int_t) clPar1[kClMC0+label1] == (Int_t) clPar2[kClMC0+label2]) | |
635 | break; | |
636 | label1++; | |
637 | if (label1 == 3) { | |
638 | label1 = 0; | |
639 | label2++; | |
640 | } | |
641 | } | |
642 | if (label2 < 3) { | |
643 | AliDebug(AliLog::kDebug, Form("Found label %d == %d for tracklet candidate %d\n", (Int_t) clPar1[kClMC0+label1], (Int_t) clPar1[kClMC0+label2], fNTracklets)); | |
644 | tracklet[kTrLab1] = clPar1[kClMC0+label1]; | |
645 | tracklet[kTrLab2] = clPar2[kClMC0+label2]; | |
646 | } else { | |
647 | 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)); | |
648 | tracklet[kTrLab1] = clPar1[kClMC0]; | |
649 | tracklet[kTrLab2] = clPar2[kClMC0]; | |
650 | } | |
651 | ||
652 | if (fHistOn) { | |
653 | Float_t eta = tracklet[kTrTheta]; | |
654 | eta= TMath::Tan(eta/2.); | |
655 | eta=-TMath::Log(eta); | |
656 | fhetaTracklets->Fill(eta); | |
657 | fhphiTracklets->Fill(tracklet[kTrPhi]); | |
658 | } | |
659 | // | |
660 | tracklet[kClID1] = partners[iC2]; | |
661 | tracklet[kClID2] = iC2; | |
662 | // | |
663 | // Printf("Adding tracklet candidate"); | |
664 | AliDebug(1,Form(" Adding tracklet candidate %d ", fNTracklets)); | |
665 | AliDebug(1,Form(" Cl. %d of Layer 1 and %d of Layer 2", partners[iC2], iC2)); | |
666 | fNTracklets++; | |
667 | ||
668 | associatedLay1[partners[iC2]] = 1; | |
669 | } | |
670 | ||
671 | // Delete the following else if you do not want to save Clusters! | |
672 | // store the cluster | |
673 | for (Int_t iC1=0; iC1<fNClustersLay1; iC1++) { | |
674 | // Printf("saving single clusters..."); | |
675 | float* clPar1 = GetClusterLayer1(iC1); | |
676 | ||
677 | if (associatedLay1[iC1]==2||associatedLay1[iC1]==0) { | |
678 | fSClusters[fNSingleCluster] = new Float_t[kClNPar]; | |
679 | fSClusters[fNSingleCluster][kSCTh] = clPar1[kClTh]; | |
680 | fSClusters[fNSingleCluster][kSCPh] = clPar1[kClPh]; | |
681 | fSClusters[fNSingleCluster][kSCLab] = clPar1[kClMC0]; | |
682 | fSClusters[fNSingleCluster][kSCID] = iC1; | |
683 | AliDebug(1,Form(" Adding a single cluster %d (cluster %d of layer 1)", | |
684 | fNSingleCluster, iC1)); | |
685 | fNSingleCluster++; | |
686 | } | |
687 | } | |
688 | ||
689 | delete[] partners; | |
690 | delete[] minDists; | |
e37e09b4 | 691 | delete[] associatedLay1; |
11ba093e | 692 | |
693 | for (Int_t i=0; i<fNClustersLay1; i++) | |
694 | if (blacklist[i]) | |
695 | delete blacklist[i]; | |
696 | delete[] blacklist; | |
697 | // Printf("exiting..."); | |
698 | AliDebug(1,Form("%d tracklets found", fNTracklets)); | |
699 | } | |
700 | ||
701 | //____________________________________________________________________ | |
702 | void AliTrackletAlg::CreateMultiplicityObject() | |
703 | { | |
704 | // create AliMultiplicity object and store it in the ESD event | |
705 | // | |
706 | TBits fastOrFiredMap,firedChipMap; | |
707 | if (fDetTypeRec) { | |
708 | fastOrFiredMap = fDetTypeRec->GetFastOrFiredMap(); | |
709 | firedChipMap = fDetTypeRec->GetFiredChipMap(fTreeRP); | |
710 | } | |
711 | // | |
712 | fMult = new AliMultiplicity(fNTracklets,fNSingleCluster,fNFiredChips[0],fNFiredChips[1],fastOrFiredMap); | |
713 | fMult->SetFiredChipMap(firedChipMap); | |
714 | AliITSRecPointContainer* rcont = AliITSRecPointContainer::Instance(); | |
715 | fMult->SetITSClusters(0,rcont->GetNClustersInLayer(1,fTreeRP)); | |
716 | for(Int_t kk=2;kk<=6;kk++) fMult->SetITSClusters(kk-1,rcont->GetNClustersInLayerFast(kk)); | |
717 | // | |
718 | for (int i=fNTracklets;i--;) { | |
719 | float* tlInfo = fTracklets[i]; | |
720 | fMult->SetTrackletData(i,tlInfo, fUsedClusLay1[int(tlInfo[kClID1])],fUsedClusLay2[int(tlInfo[kClID2])]); | |
721 | } | |
722 | // | |
723 | for (int i=fNSingleCluster;i--;) { | |
724 | float* clInfo = fSClusters[i]; | |
725 | fMult->SetSingleClusterData(i,clInfo,fUsedClusLay1[int(clInfo[kSCID])]); | |
726 | } | |
727 | fMult->CompactBits(); | |
728 | // | |
729 | } | |
730 | ||
731 | ||
732 | //____________________________________________________________________ | |
733 | void AliTrackletAlg::LoadClusterArrays(TTree* itsClusterTree) | |
734 | { | |
735 | // This method | |
736 | // - gets the clusters from the cluster tree | |
737 | // - convert them into global coordinates | |
738 | // - store them in the internal arrays | |
739 | // - count the number of cluster-fired chips | |
740 | // | |
741 | // RS: This method was strongly modified wrt original. In order to have the same numbering | |
742 | // of clusters as in the ITS reco I had to introduce sorting in Z | |
743 | // Also note that now the clusters data are stored not in float[6] attached to float**, but in 1-D array | |
744 | AliDebug(1,"Loading clusters and cluster-fired chips ..."); | |
745 | ||
746 | fNClustersLay1 = 0; | |
747 | fNClustersLay2 = 0; | |
748 | fNFiredChips[0] = 0; | |
749 | fNFiredChips[1] = 0; | |
750 | ||
751 | AliITSsegmentationSPD seg; | |
752 | ||
753 | // AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance(); | |
754 | // TClonesArray* itsClusters=rpcont->FetchClusters(0,itsClusterTree); | |
755 | // if(!rpcont->IsSPDActive()){ | |
756 | // AliWarning("No SPD rec points found, multiplicity not calculated"); | |
757 | // return; | |
758 | // } | |
759 | ||
760 | TClonesArray statITSrec("AliITSRecPoint"); | |
761 | TClonesArray* itsClusters= &statITSrec; | |
762 | ||
763 | TBranch* branch=itsClusterTree->GetBranch("ITSRecPoints"); | |
764 | if(!branch) { | |
765 | printf("NO itsClusterTree branch available. Skipping...\n"); | |
766 | return; | |
767 | } | |
768 | ||
769 | branch->SetAddress(&itsClusters); | |
770 | // count clusters | |
771 | // loop over the SPD subdetectors | |
772 | static TClonesArray clArr("AliITSRecPoint",100); | |
773 | // Float_t cluGlo[3] = {0.,0.,0.}; | |
774 | for (int il=0;il<2;il++) { | |
775 | int nclLayer = 0; | |
776 | int detMin = AliITSgeomTGeo::GetModuleIndex(il+1,1,1); | |
777 | int detMax = AliITSgeomTGeo::GetModuleIndex(il+2,1,1); | |
778 | for (int idt=detMin;idt<detMax;idt++) { | |
779 | branch->GetEvent(idt); | |
780 | int nClusters = itsClusters->GetEntriesFast(); | |
781 | // itsClusters=rpcont->UncheckedGetClusters(idt); | |
782 | if (!nClusters) continue; | |
783 | Int_t nClustersInChip[5] = {0,0,0,0,0}; | |
784 | while(nClusters--) { | |
785 | AliITSRecPoint* cluster = (AliITSRecPoint*)itsClusters->UncheckedAt(nClusters); | |
786 | if (!cluster) continue; | |
787 | /* cluster->GetGlobalXYZ(cluGlo); | |
788 | if (idt==0) | |
789 | Printf("First Cl1 LoadClArr %f %f %f ",cluGlo[0],cluGlo[1],cluGlo[2]); | |
790 | if (idt==80) | |
791 | Printf("First Cl2 LoadClArr %f %f %f ",cluGlo[0],cluGlo[1],cluGlo[2]);*/ | |
792 | new (clArr[nclLayer++]) AliITSRecPoint(*cluster); | |
56df5f44 | 793 | // find the chip for the current cluster |
794 | Float_t locz = cluster->GetDetLocalZ(); | |
795 | Int_t iChip = seg.GetChipFromLocal(0,locz); | |
796 | if (iChip>=0) | |
797 | nClustersInChip[iChip]++; | |
11ba093e | 798 | } |
799 | for(Int_t ifChip=5;ifChip--;) if (nClustersInChip[ifChip]) fNFiredChips[il]++; | |
800 | } | |
801 | // sort the clusters in Z (to have the same numbering as in ITS reco | |
802 | Float_t *z = new Float_t[nclLayer]; | |
803 | Int_t * index = new Int_t[nclLayer]; | |
804 | for (int ic=0;ic<nclLayer;ic++) z[ic] = ((AliITSRecPoint*)clArr[ic])->GetZ(); | |
805 | TMath::Sort(nclLayer,z,index,kFALSE); | |
806 | Float_t* clustersLay = new Float_t[nclLayer*kClNPar]; | |
807 | Int_t* detectorIndexClustersLay = new Int_t[nclLayer]; | |
808 | Bool_t* overlapFlagClustersLay = new Bool_t[nclLayer]; | |
809 | UInt_t* usedClusLay = new UInt_t[nclLayer]; | |
810 | // | |
811 | for (int ic=0;ic<nclLayer;ic++) { | |
812 | AliITSRecPoint* cluster = (AliITSRecPoint*)clArr[index[ic]]; | |
813 | float* clPar = &clustersLay[ic*kClNPar]; | |
814 | // | |
815 | cluster->GetGlobalXYZ( clPar ); | |
816 | // if (ic==0 && detMin==0) Printf("First Cl1 LoadClArrSorted %f %f %f ",clPar[kClTh],clPar[kClPh],clPar[kClZ]); | |
817 | // if (ic==0 && detMin==80) Printf("First Cl2 LoadClArrSorted %f %f %f ",clPar[kClTh],clPar[kClPh],clPar[kClZ]); | |
818 | // if (ic==0 && detMin==0) Printf("First Cl1 LoadClArrSorted %f %f %f ",clPar[0],clPar[1],clPar[2]); | |
819 | // if (ic==0 && detMin==80) Printf("First Cl2 LoadClArrSorted %f %f %f ",clPar[0],clPar[1],clPar[2]); | |
820 | detectorIndexClustersLay[ic] = cluster->GetDetectorIndex(); | |
821 | overlapFlagClustersLay[ic] = kFALSE; | |
822 | usedClusLay[ic] = 0; | |
823 | for (Int_t i=3;i--;) clPar[kClMC0+i] = cluster->GetLabel(i); | |
824 | } | |
825 | clArr.Clear(); | |
826 | delete[] z; | |
827 | delete[] index; | |
828 | // | |
829 | if (il==0) { | |
830 | fClustersLay1 = clustersLay; | |
831 | fOverlapFlagClustersLay1 = overlapFlagClustersLay; | |
832 | fDetectorIndexClustersLay1 = detectorIndexClustersLay; | |
833 | fUsedClusLay1 = usedClusLay; | |
834 | fNClustersLay1 = nclLayer; | |
835 | } | |
836 | else { | |
837 | fClustersLay2 = clustersLay; | |
838 | fOverlapFlagClustersLay2 = overlapFlagClustersLay; | |
839 | fDetectorIndexClustersLay2 = detectorIndexClustersLay; | |
840 | fUsedClusLay2 = usedClusLay; | |
841 | fNClustersLay2 = nclLayer; | |
842 | } | |
843 | } | |
844 | // Printf("First Cl1 %f %f %f ",fClustersLay1[0],fClustersLay1[1],fClustersLay1[2]); | |
845 | // Printf("First Cl2 %f %f %f ",fClustersLay2[0],fClustersLay2[1],fClustersLay2[2]); | |
846 | Printf("LoadClusterArr: N cl1 %d",fNClustersLay1); | |
847 | Printf("LoadClusterArrN: N cl2 %d",fNClustersLay2); | |
848 | // | |
849 | // no double association allowed // ?? | |
850 | int nmaxT = TMath::Min(fNClustersLay1, fNClustersLay2); | |
851 | fTracklets = new Float_t*[nmaxT]; | |
852 | fSClusters = new Float_t*[fNClustersLay1]; | |
853 | for (Int_t i=nmaxT;i--;) fTracklets[i] = 0; | |
854 | // | |
855 | AliDebug(1,Form("(clusters in layer 1 : %d, layer 2: %d)",fNClustersLay1,fNClustersLay2)); | |
856 | AliDebug(1,Form("(cluster-fired chips in layer 1 : %d, layer 2: %d)",fNFiredChips[0],fNFiredChips[1])); | |
857 | } | |
858 | //____________________________________________________________________ | |
859 | void | |
860 | AliTrackletAlg::LoadClusterFiredChips(TTree* itsClusterTree) { | |
861 | // This method | |
862 | // - gets the clusters from the cluster tree | |
863 | // - counts the number of (cluster)fired chips | |
864 | ||
865 | AliDebug(1,"Loading cluster-fired chips ..."); | |
866 | ||
867 | fNFiredChips[0] = 0; | |
868 | fNFiredChips[1] = 0; | |
869 | ||
870 | AliITSsegmentationSPD seg; | |
871 | AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance(); | |
e37e09b4 | 872 | TClonesArray* itsClusters=NULL; |
873 | rpcont->FetchClusters(0,itsClusterTree); | |
11ba093e | 874 | if(!rpcont->IsSPDActive()){ |
875 | AliWarning("No SPD rec points found, multiplicity not calculated"); | |
876 | return; | |
877 | } | |
878 | ||
879 | // loop over the its subdetectors | |
880 | Int_t nSPDmodules=AliITSgeomTGeo::GetModuleIndex(3,1,1); | |
881 | for (Int_t iIts=0; iIts < nSPDmodules; iIts++) { | |
882 | itsClusters=rpcont->UncheckedGetClusters(iIts); | |
883 | Int_t nClusters = itsClusters->GetEntriesFast(); | |
884 | ||
885 | // number of clusters in each chip of the current module | |
886 | Int_t nClustersInChip[5] = {0,0,0,0,0}; | |
887 | Int_t layer = 0; | |
888 | ||
889 | // loop over clusters | |
890 | while(nClusters--) { | |
891 | AliITSRecPoint* cluster = (AliITSRecPoint*)itsClusters->UncheckedAt(nClusters); | |
892 | ||
893 | layer = cluster->GetLayer(); | |
0ace2f80 | 894 | if (layer>1) break; // no point in further check for this module |
11ba093e | 895 | |
896 | // find the chip for the current cluster | |
897 | Float_t locz = cluster->GetDetLocalZ(); | |
898 | Int_t iChip = seg.GetChipFromLocal(0,locz); | |
e37e09b4 | 899 | if (iChip>=0) |
900 | nClustersInChip[iChip]++; | |
11ba093e | 901 | |
902 | }// end of cluster loop | |
0ace2f80 | 903 | if (layer>1) continue; // make sure we are in the SPD layer |
11ba093e | 904 | // get number of fired chips in the current module |
905 | for(Int_t ifChip=0; ifChip<5; ifChip++) { | |
906 | if(nClustersInChip[ifChip] >= 1) fNFiredChips[layer]++; | |
907 | } | |
908 | ||
909 | } // end of its "subdetector" loop | |
910 | ||
911 | ||
912 | AliDebug(1,Form("(cluster-fired chips in layer 1 : %d, layer 2: %d)",fNFiredChips[0],fNFiredChips[1])); | |
913 | } | |
914 | //____________________________________________________________________ | |
915 | void | |
916 | AliTrackletAlg::SaveHists() { | |
917 | // This method save the histograms on the output file | |
918 | // (only if fHistOn is TRUE). | |
919 | ||
920 | if (!fHistOn) | |
921 | return; | |
922 | ||
923 | fhClustersDPhiAll->Write(); | |
924 | fhClustersDThetaAll->Write(); | |
925 | fhDPhiVsDThetaAll->Write(); | |
926 | ||
927 | fhClustersDPhiAcc->Write(); | |
928 | fhClustersDThetaAcc->Write(); | |
929 | fhDPhiVsDThetaAcc->Write(); | |
930 | ||
931 | fhetaTracklets->Write(); | |
932 | fhphiTracklets->Write(); | |
933 | fhetaClustersLay1->Write(); | |
934 | fhphiClustersLay1->Write(); | |
935 | } | |
936 | ||
937 | //____________________________________________________________________ | |
938 | void | |
939 | AliTrackletAlg::FlagClustersInOverlapRegions (Int_t iC1, Int_t iC2WithBestDist) { | |
940 | ||
941 | Float_t distClSameMod=0.; | |
942 | Float_t distClSameModMin=0.; | |
943 | Int_t iClOverlap =0; | |
944 | Float_t meanRadiusLay1 = 3.99335; // average radius inner layer | |
945 | Float_t meanRadiusLay2 = 7.37935; // average radius outer layer; | |
946 | ||
947 | Float_t zproj1=0.; | |
948 | Float_t zproj2=0.; | |
949 | Float_t deZproj=0.; | |
950 | Float_t* clPar1 = GetClusterLayer1(iC1); | |
951 | Float_t* clPar2B = GetClusterLayer2(iC2WithBestDist); | |
952 | // Loop on inner layer clusters | |
953 | for (Int_t iiC1=0; iiC1<fNClustersLay1; iiC1++) { | |
954 | if (!fOverlapFlagClustersLay1[iiC1]) { | |
955 | // only for adjacent modules | |
956 | if ((TMath::Abs(fDetectorIndexClustersLay1[iC1]-fDetectorIndexClustersLay1[iiC1])==4)|| | |
957 | (TMath::Abs(fDetectorIndexClustersLay1[iC1]-fDetectorIndexClustersLay1[iiC1])==76)) { | |
958 | Float_t *clPar11 = GetClusterLayer1(iiC1); | |
959 | Float_t dePhi=TMath::Abs(clPar11[kClPh]-clPar1[kClPh]); | |
960 | if (dePhi>TMath::Pi()) dePhi=2.*TMath::Pi()-dePhi; | |
961 | ||
962 | zproj1=meanRadiusLay1/TMath::Tan(clPar1[kClTh]); | |
963 | zproj2=meanRadiusLay1/TMath::Tan(clPar11[kClTh]); | |
964 | ||
965 | deZproj=TMath::Abs(zproj1-zproj2); | |
966 | ||
967 | distClSameMod = TMath::Sqrt(TMath::Power(deZproj/fZetaOverlapCut,2)+TMath::Power(dePhi/fPhiOverlapCut,2)); | |
968 | if (distClSameMod<=1.) fOverlapFlagClustersLay1[iiC1]=kTRUE; | |
969 | ||
970 | // if (distClSameMod<=1.) { | |
971 | // if (distClSameModMin==0. || distClSameMod<distClSameModMin) { | |
972 | // distClSameModMin=distClSameMod; | |
973 | // iClOverlap=iiC1; | |
974 | // } | |
975 | // } | |
976 | ||
977 | ||
978 | } // end adjacent modules | |
979 | } | |
980 | } // end Loop on inner layer clusters | |
981 | ||
982 | // if (distClSameModMin!=0.) fOverlapFlagClustersLay1[iClOverlap]=kTRUE; | |
983 | ||
984 | distClSameMod=0.; | |
985 | distClSameModMin=0.; | |
986 | iClOverlap =0; | |
987 | // Loop on outer layer clusters | |
988 | for (Int_t iiC2=0; iiC2<fNClustersLay2; iiC2++) { | |
989 | if (!fOverlapFlagClustersLay2[iiC2]) { | |
990 | // only for adjacent modules | |
991 | Float_t *clPar2 = GetClusterLayer2(iiC2); | |
992 | if ((TMath::Abs(fDetectorIndexClustersLay2[iC2WithBestDist]-fDetectorIndexClustersLay2[iiC2])==4) || | |
993 | (TMath::Abs(fDetectorIndexClustersLay2[iC2WithBestDist]-fDetectorIndexClustersLay2[iiC2])==156)) { | |
994 | Float_t dePhi=TMath::Abs(clPar2[kClPh]-clPar2B[kClPh]); | |
995 | if (dePhi>TMath::Pi()) dePhi=2.*TMath::Pi()-dePhi; | |
996 | ||
997 | zproj1=meanRadiusLay2/TMath::Tan(clPar2B[kClTh]); | |
998 | zproj2=meanRadiusLay2/TMath::Tan(clPar2[kClTh]); | |
999 | ||
1000 | deZproj=TMath::Abs(zproj1-zproj2); | |
1001 | distClSameMod = TMath::Sqrt(TMath::Power(deZproj/fZetaOverlapCut,2)+TMath::Power(dePhi/fPhiOverlapCut,2)); | |
1002 | if (distClSameMod<=1.) fOverlapFlagClustersLay2[iiC2]=kTRUE; | |
1003 | ||
1004 | // if (distClSameMod<=1.) { | |
1005 | // if (distClSameModMin==0. || distClSameMod<distClSameModMin) { | |
1006 | // distClSameModMin=distClSameMod; | |
1007 | // iClOverlap=iiC2; | |
1008 | // } | |
1009 | // } | |
1010 | ||
1011 | } // end adjacent modules | |
1012 | } | |
1013 | } // end Loop on outer layer clusters | |
1014 | ||
1015 | // if (distClSameModMin!=0.) fOverlapFlagClustersLay2[iClOverlap]=kTRUE; | |
1016 | ||
1017 | } | |
1018 | ||
1019 | //____________________________________________________________________ | |
1020 | void AliTrackletAlg::ProcessESDTracks() | |
1021 | { | |
1022 | // Flag the clusters used by ESD tracks | |
1023 | // Flag primary tracks to be used for multiplicity counting | |
1024 | // | |
1025 | if (!fESDEvent) return; | |
1026 | AliESDVertex* vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexTracks(); | |
1027 | if (!vtx || vtx->GetNContributors()<1) vtx = (AliESDVertex*)fESDEvent->GetPrimaryVertexSPD(); | |
1028 | if (!vtx || vtx->GetNContributors()<1) { | |
1029 | AliDebug(1,"No primary vertex: cannot flag primary tracks"); | |
1030 | return; | |
1031 | } | |
1032 | Int_t ntracks = fESDEvent->GetNumberOfTracks(); | |
1033 | for(Int_t itr=0; itr<ntracks; itr++) { | |
1034 | AliESDtrack* track = fESDEvent->GetTrack(itr); | |
1035 | if (!track->IsOn(AliESDtrack::kITSin)) continue; // use only tracks propagated in ITS to vtx | |
1036 | FlagTrackClusters(itr); | |
1037 | FlagIfSecondary(track,vtx); | |
1038 | } | |
1039 | FlagV0s(vtx); | |
1040 | // | |
1041 | } | |
1042 | ||
1043 | //____________________________________________________________________ | |
1044 | void AliTrackletAlg::FlagTrackClusters(Int_t id) | |
1045 | { | |
1046 | // RS: flag the SPD clusters of the track if it is useful for the multiplicity estimation | |
1047 | // | |
1048 | const UInt_t kMaskL = 0x0000ffff; | |
1049 | const UInt_t kMaskH = 0xffff0000; | |
1050 | const UInt_t kMaxTrID = kMaskL - 1; // max possible track id | |
1051 | if (UInt_t(id)>kMaxTrID) return; | |
1052 | const AliESDtrack* track = fESDEvent->GetTrack(id); | |
1053 | Int_t idx[12]; | |
1054 | if ( track->GetITSclusters(idx)<3 ) return; // at least 3 clusters must be used in the fit | |
1055 | UInt_t *uClus[2] = {fUsedClusLay1,fUsedClusLay2}; | |
1056 | // | |
1057 | UInt_t mark = id+1; | |
1058 | if (track->IsOn(AliESDtrack::kITSpureSA)) mark <<= 16; | |
1059 | // | |
1060 | for (int i=AliESDfriendTrack::kMaxITScluster;i--;) { | |
1061 | // note: i>=6 is for extra clusters | |
1062 | if (idx[i]<0) continue; | |
1063 | int layID= (idx[i] & 0xf0000000) >> 28; | |
1064 | if (layID>1) continue; // SPD only | |
1065 | int clID = (idx[i] & 0x0fffffff); | |
1066 | // | |
1067 | if ( track->IsOn(AliESDtrack::kITSpureSA) ) { | |
1068 | if (uClus[layID][clID]&kMaskH) { | |
1069 | AliWarning(Form("Tracks %5d and %5d share cluster %6d of lr%d",id,int(uClus[layID][clID]>>16)-1,clID,layID)); | |
1070 | uClus[layID][clID] &= kMaskL; | |
1071 | } | |
1072 | } | |
1073 | else if (uClus[layID][clID]&kMaskL) { | |
1074 | AliWarning(Form("Tracks %5d and %5d share cluster %6d of lr%d",id,int(uClus[layID][clID]&kMaskL)-1,clID,layID)); | |
1075 | uClus[layID][clID] &= kMaskH; | |
1076 | } | |
1077 | uClus[layID][clID] |= mark; | |
1078 | } | |
1079 | // | |
1080 | } | |
1081 | ||
1082 | //____________________________________________________________________ | |
1083 | void AliTrackletAlg::FlagIfSecondary(AliESDtrack* track, const AliVertex* vtx) | |
1084 | { | |
1085 | // RS: check if the track is primary and set the flag | |
1086 | double cut = (track->HasPointOnITSLayer(0)||track->HasPointOnITSLayer(1)) ? fCutPxDrSPDin:fCutPxDrSPDout; | |
1087 | float xz[2]; | |
1088 | track->GetDZ(vtx->GetX(),vtx->GetY(),vtx->GetZ(), fESDEvent->GetMagneticField(), xz); | |
1089 | if (TMath::Abs(xz[0]*track->P())>cut || TMath::Abs(xz[1]*track->P())>fCutPxDz || | |
1090 | TMath::Abs(xz[0])>fCutDCArz || TMath::Abs(xz[1])>fCutDCArz) | |
1091 | track->SetStatus(AliESDtrack::kMultSec); | |
1092 | else track->ResetStatus(AliESDtrack::kMultSec); | |
1093 | } | |
1094 | ||
1095 | //____________________________________________________________________ | |
1096 | void AliTrackletAlg::FlagV0s(const AliESDVertex *vtx) | |
1097 | { | |
1098 | // flag tracks belonging to v0s | |
1099 | // | |
1100 | const double kK0Mass = 0.4976; | |
1101 | // | |
1102 | AliV0 pvertex; | |
1103 | AliKFVertex vertexKF; | |
1104 | AliKFParticle epKF0,epKF1,pipmKF0,piKF0,piKF1,gammaKF,k0KF; | |
1105 | Double_t mass,massErr,chi2c; | |
1106 | enum {kKFIni=BIT(14)}; | |
1107 | // | |
1108 | double recVtx[3]; | |
1109 | float recVtxF[3]; | |
1110 | vtx->GetXYZ(recVtx); | |
1111 | for (int i=3;i--;) recVtxF[i] = recVtx[i]; | |
1112 | // | |
1113 | int ntracks = fESDEvent->GetNumberOfTracks(); | |
1114 | if (ntracks<2) return; | |
1115 | // | |
1116 | vertexKF.X() = recVtx[0]; | |
1117 | vertexKF.Y() = recVtx[1]; | |
1118 | vertexKF.Z() = recVtx[2]; | |
1119 | vertexKF.Covariance(0,0) = vtx->GetXRes()*vtx->GetXRes(); | |
1120 | vertexKF.Covariance(1,2) = vtx->GetYRes()*vtx->GetYRes(); | |
1121 | vertexKF.Covariance(2,2) = vtx->GetZRes()*vtx->GetZRes(); | |
1122 | // | |
1123 | AliESDtrack *trc0,*trc1; | |
1124 | for (int it0=0;it0<ntracks;it0++) { | |
1125 | trc0 = fESDEvent->GetTrack(it0); | |
1126 | if (trc0->IsOn(AliESDtrack::kMultInV0)) continue; | |
1127 | if (!trc0->IsOn(AliESDtrack::kITSin)) continue; | |
1128 | Bool_t isSAP = trc0->IsPureITSStandalone(); | |
1129 | Int_t q0 = trc0->Charge(); | |
1130 | Bool_t testGamma = CanBeElectron(trc0); | |
1131 | epKF0.ResetBit(kKFIni); | |
1132 | piKF0.ResetBit(kKFIni); | |
1133 | double bestChi2=1e16; | |
1134 | int bestID = -1; | |
1135 | // | |
1136 | for (int it1=it0+1;it1<ntracks;it1++) { | |
1137 | trc1 = fESDEvent->GetTrack(it1); | |
1138 | if (trc1->IsOn(AliESDtrack::kMultInV0)) continue; | |
1139 | if (!trc1->IsOn(AliESDtrack::kITSin)) continue; | |
1140 | if (trc1->IsPureITSStandalone() != isSAP) continue; // pair separately ITS_SA_Pure tracks and TPC/ITS+ITS_SA | |
1141 | if ( (q0+trc1->Charge())!=0 ) continue; // don't pair like signs | |
1142 | // | |
1143 | pvertex.SetParamN(q0<0 ? *trc0:*trc1); | |
1144 | pvertex.SetParamP(q0>0 ? *trc0:*trc1); | |
1145 | pvertex.Update(recVtxF); | |
1146 | if (pvertex.P()<fCutMinP) continue; | |
1147 | if (pvertex.GetV0CosineOfPointingAngle()<fCutMinPointAngle) continue; | |
1148 | if (pvertex.GetDcaV0Daughters()>fCutMaxDCADauther) continue; | |
1149 | double d = pvertex.GetD(recVtx[0],recVtx[1],recVtx[2]); | |
1150 | if (d>fCutMaxDCA) continue; | |
1151 | double dx=recVtx[0]-pvertex.Xv(), dy=recVtx[1]-pvertex.Yv(); | |
1152 | double rv = TMath::Sqrt(dx*dx+dy*dy); | |
1153 | // | |
1154 | // check gamma conversion hypothesis ----------------------------------------------------------->>> | |
1155 | Bool_t gammaOK = kFALSE; | |
1156 | while (testGamma && CanBeElectron(trc1)) { | |
1157 | if (rv<fCutMinRGamma) break; | |
1158 | if (!epKF0.TestBit(kKFIni)) { | |
1159 | new(&epKF0) AliKFParticle(*trc0,q0>0 ? kPositron:kElectron); | |
1160 | epKF0.SetBit(kKFIni); | |
1161 | } | |
1162 | new(&epKF1) AliKFParticle(*trc1,q0<0 ? kPositron:kElectron); | |
1163 | gammaKF.Initialize(); | |
1164 | gammaKF += epKF0; | |
1165 | gammaKF += epKF1; | |
1166 | gammaKF.SetProductionVertex(vertexKF); | |
1167 | gammaKF.GetMass(mass,massErr); | |
1168 | if (mass>fCutMassGamma || (massErr>0&&(mass>massErr*fCutMassGammaNSigma))) break; | |
1169 | if (gammaKF.GetS()<fCutGammaSFromDecay) break; | |
1170 | gammaKF.SetMassConstraint(0.,0.001); | |
1171 | chi2c = (gammaKF.GetNDF()!=0) ? gammaKF.GetChi2()/gammaKF.GetNDF() : 1000; | |
1172 | if (chi2c>fCutChi2cGamma) break; | |
1173 | gammaOK = kTRUE; | |
1174 | if (chi2c>bestChi2) break; | |
1175 | bestChi2 = chi2c; | |
1176 | bestID = it1; | |
1177 | break; | |
1178 | } | |
1179 | if (gammaOK) continue; | |
1180 | // check gamma conversion hypothesis -----------------------------------------------------------<<< | |
1181 | // check K0 conversion hypothesis ----------------------------------------------------------->>> | |
1182 | while (1) { | |
1183 | if (rv<fCutMinRK0) break; | |
1184 | if (!piKF0.TestBit(kKFIni)) { | |
1185 | new(&piKF0) AliKFParticle(*trc0,q0>0 ? kPiPlus:kPiMinus); | |
1186 | piKF0.SetBit(kKFIni); | |
1187 | } | |
1188 | new(&piKF1) AliKFParticle(*trc1,q0<0 ? kPiPlus:kPiMinus); | |
1189 | k0KF.Initialize(); | |
1190 | k0KF += piKF0; | |
1191 | k0KF += piKF1; | |
1192 | k0KF.SetProductionVertex(vertexKF); | |
1193 | k0KF.GetMass(mass,massErr); | |
1194 | mass -= kK0Mass; | |
1195 | if (TMath::Abs(mass)>fCutMassK0 || (massErr>0&&(abs(mass)>massErr*fCutMassK0NSigma))) break; | |
1196 | if (k0KF.GetS()<fCutK0SFromDecay) break; | |
1197 | k0KF.SetMassConstraint(kK0Mass,0.001); | |
1198 | chi2c = (k0KF.GetNDF()!=0) ? k0KF.GetChi2()/k0KF.GetNDF() : 1000; | |
1199 | if (chi2c>fCutChi2cK0) break; | |
1200 | if (chi2c>bestChi2) break; | |
1201 | bestChi2 = chi2c; | |
1202 | bestID = it1; | |
1203 | break; | |
1204 | } | |
1205 | // check K0 conversion hypothesis -----------------------------------------------------------<<< | |
1206 | } | |
1207 | // | |
1208 | if (bestID>=0) { | |
1209 | trc0->SetStatus(AliESDtrack::kMultInV0); | |
1210 | fESDEvent->GetTrack(bestID)->SetStatus(AliESDtrack::kMultInV0); | |
1211 | } | |
1212 | } | |
1213 | // | |
1214 | } | |
1215 | ||
1216 | //____________________________________________________________________ | |
1217 | Bool_t AliTrackletAlg::CanBeElectron(const AliESDtrack* trc) const | |
1218 | { | |
1219 | // check if the track can be electron | |
1220 | Double_t pid[AliPID::kSPECIES]; | |
1221 | if (!trc->IsOn(AliESDtrack::kESDpid)) return kTRUE; | |
1222 | trc->GetESDpid(pid); | |
1223 | return (trc->IsOn(AliESDtrack::kTPCpid)) ? | |
1224 | pid[AliPID::kElectron]>fCutMinElectronProbTPC : | |
1225 | pid[AliPID::kElectron]>fCutMinElectronProbESD; | |
1226 | // | |
1227 | } |