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70c95f95 | 1 | /************************************************************************** |
2 | * Copyright(c) 2006-2008, 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 | **************************************************************************/ | |
70c95f95 | 15 | #include <TTree.h> |
b21c1af0 | 16 | #include "AliRunLoader.h" |
6a0d56b8 | 17 | #include "AliESDVertex.h" |
cd706e57 | 18 | #include "AliLog.h" |
6a0d56b8 | 19 | #include "AliStrLine.h" |
20 | #include "AliTracker.h" | |
70c95f95 | 21 | #include "AliITSDetTypeRec.h" |
22 | #include "AliITSRecPoint.h" | |
b21c1af0 | 23 | #include "AliITSRecPointContainer.h" |
32e63e47 | 24 | #include "AliITSgeomTGeo.h" |
6a0d56b8 | 25 | #include "AliVertexerTracks.h" |
26 | #include "AliITSVertexer3D.h" | |
0b7bac55 | 27 | #include "AliITSVertexerZ.h" |
6b4d9537 | 28 | #include "AliITSSortTrkl.h" |
70c95f95 | 29 | ///////////////////////////////////////////////////////////////// |
30 | // this class implements a method to determine | |
31 | // the 3 coordinates of the primary vertex | |
9801e044 | 32 | // optimized for |
33 | // p-p collisions | |
70c95f95 | 34 | //////////////////////////////////////////////////////////////// |
35 | ||
efe6147d | 36 | const Int_t AliITSVertexer3D::fgkMaxNumOfClDefault = 300; |
37 | const Int_t AliITSVertexer3D::fgkMaxNumOfClRebinDefault = 500; | |
38 | const Int_t AliITSVertexer3D::fgkMaxNumOfClDownscaleDefault = 1000; | |
39 | const Float_t AliITSVertexer3D::fgk3DBinSizeDefault = 0.1; | |
9801e044 | 40 | |
70c95f95 | 41 | ClassImp(AliITSVertexer3D) |
42 | ||
6a0d56b8 | 43 | /* $Id$ */ |
44 | ||
70c95f95 | 45 | //______________________________________________________________________ |
7d766abb | 46 | AliITSVertexer3D::AliITSVertexer3D(): |
47 | AliITSVertexer(), | |
48 | fLines("AliStrLine",1000), | |
49 | fVert3D(), | |
50 | fCoarseDiffPhiCut(0.), | |
51 | fFineDiffPhiCut(0.), | |
52 | fCutOnPairs(0.), | |
53 | fCoarseMaxRCut(0.), | |
54 | fMaxRCut(0.), | |
87104b06 | 55 | fMaxRCut2(0.), |
7d766abb | 56 | fZCutDiamond(0.), |
57 | fMaxZCut(0.), | |
58 | fDCAcut(0.), | |
59 | fDiffPhiMax(0.), | |
60 | fMeanPSelTrk(0.), | |
61 | fMeanPtSelTrk(0.), | |
62 | fUsedCluster(kMaxCluPerMod*kNSPDMod), | |
63 | fZHisto(0), | |
64 | fDCAforPileup(0.), | |
c238ba33 | 65 | fDiffPhiforPileup(0.), |
7d766abb | 66 | fBinSizeR(0.), |
67 | fBinSizeZ(0.), | |
9801e044 | 68 | fPileupAlgo(0), |
507265fd | 69 | fMaxNumOfCl(fgkMaxNumOfClDefault), |
efe6147d | 70 | fMaxNumOfClForRebin(fgkMaxNumOfClRebinDefault), |
71 | fMaxNumOfClForDownScale(fgkMaxNumOfClDownscaleDefault), | |
72 | fNRecPLay1(0), | |
73 | fNRecPLay2(0), | |
74 | f3DBinSize(fgk3DBinSizeDefault), | |
507265fd | 75 | fDoDownScale(kFALSE), |
efe6147d | 76 | fGenerForDownScale(0), |
77 | f3DPeak(), | |
78 | fHighMultAlgo(1), | |
79 | fSwitchAlgorithm(kFALSE) | |
6a0d56b8 | 80 | { |
70c95f95 | 81 | // Default constructor |
82 | SetCoarseDiffPhiCut(); | |
6b4d9537 | 83 | SetFineDiffPhiCut(); |
84 | SetCutOnPairs(); | |
05d1294c | 85 | SetCoarseMaxRCut(); |
70c95f95 | 86 | SetMaxRCut(); |
87104b06 | 87 | SetMaxRCutAlgo2(); |
70c95f95 | 88 | SetZCutDiamond(); |
05d1294c | 89 | SetMaxZCut(); |
7203e11a | 90 | SetDCACut(); |
70c95f95 | 91 | SetDiffPhiMax(); |
6a0d56b8 | 92 | SetMeanPSelTracks(); |
93 | SetMeanPtSelTracks(); | |
cd1c2af1 | 94 | SetMinDCAforPileup(); |
c238ba33 | 95 | SetDeltaPhiforPileup(); |
cd1c2af1 | 96 | SetPileupAlgo(); |
7d766abb | 97 | SetBinSizeR(); |
98 | SetBinSizeZ(); | |
242c8025 | 99 | Double_t binsize=0.02; // default 200 micron |
cd1c2af1 | 100 | Int_t nbins=static_cast<Int_t>(1+2*fZCutDiamond/binsize); |
101 | fZHisto=new TH1F("hz","",nbins,-fZCutDiamond,-fZCutDiamond+binsize*nbins); | |
507265fd | 102 | fGenerForDownScale=new TRandom3(987654321); |
70c95f95 | 103 | } |
104 | ||
f510fd70 | 105 | //______________________________________________________________________ |
106 | AliITSVertexer3D::AliITSVertexer3D(TRootIOCtor*): | |
107 | AliITSVertexer(), | |
108 | fLines("AliStrLine",1000), | |
109 | fVert3D(), | |
110 | fCoarseDiffPhiCut(0.), | |
111 | fFineDiffPhiCut(0.), | |
112 | fCutOnPairs(0.), | |
113 | fCoarseMaxRCut(0.), | |
114 | fMaxRCut(0.), | |
115 | fMaxRCut2(0.), | |
116 | fZCutDiamond(0.), | |
117 | fMaxZCut(0.), | |
118 | fDCAcut(0.), | |
119 | fDiffPhiMax(0.), | |
120 | fMeanPSelTrk(0.), | |
121 | fMeanPtSelTrk(0.), | |
122 | fUsedCluster(kMaxCluPerMod*kNSPDMod), | |
123 | fZHisto(0), | |
124 | fDCAforPileup(0.), | |
125 | fDiffPhiforPileup(0.), | |
126 | fBinSizeR(0.), | |
127 | fBinSizeZ(0.), | |
128 | fPileupAlgo(0), | |
129 | fMaxNumOfCl(fgkMaxNumOfClDefault), | |
130 | fMaxNumOfClForRebin(fgkMaxNumOfClRebinDefault), | |
131 | fMaxNumOfClForDownScale(fgkMaxNumOfClDownscaleDefault), | |
132 | fNRecPLay1(0), | |
133 | fNRecPLay2(0), | |
134 | f3DBinSize(fgk3DBinSizeDefault), | |
135 | fDoDownScale(kFALSE), | |
136 | fGenerForDownScale(0), | |
137 | f3DPeak(), | |
138 | fHighMultAlgo(1), | |
139 | fSwitchAlgorithm(kFALSE) | |
140 | { | |
141 | // I/O constructor | |
142 | ||
143 | ||
144 | } | |
145 | ||
70c95f95 | 146 | //______________________________________________________________________ |
147 | AliITSVertexer3D::~AliITSVertexer3D() { | |
148 | // Destructor | |
f5f6da22 | 149 | fLines.Clear("C"); |
cd1c2af1 | 150 | if(fZHisto) delete fZHisto; |
507265fd | 151 | if(fGenerForDownScale) delete fGenerForDownScale; |
70c95f95 | 152 | } |
153 | ||
27167524 | 154 | //______________________________________________________________________ |
155 | void AliITSVertexer3D::ResetVert3D(){ | |
f510fd70 | 156 | // Reset the fVert3D object and reset the used clusters |
6b4d9537 | 157 | ResetVertex(); |
27167524 | 158 | fVert3D.SetXv(0.); |
159 | fVert3D.SetYv(0.); | |
160 | fVert3D.SetZv(0.); | |
161 | fVert3D.SetDispersion(0.); | |
162 | fVert3D.SetNContributors(0); | |
cd1c2af1 | 163 | fUsedCluster.ResetAllBits(0); |
27167524 | 164 | } |
70c95f95 | 165 | //______________________________________________________________________ |
308c2f7c | 166 | AliESDVertex* AliITSVertexer3D::FindVertexForCurrentEvent(TTree *itsClusterTree){ |
70c95f95 | 167 | // Defines the AliESDVertex for the current event |
27167524 | 168 | ResetVert3D(); |
308c2f7c | 169 | AliDebug(1,"FindVertexForCurrentEvent - 3D - PROCESSING NEXT EVENT"); |
6b4d9537 | 170 | fLines.Clear("C"); |
171 | fCurrentVertex = NULL; | |
70c95f95 | 172 | |
308c2f7c | 173 | Int_t nolines = FindTracklets(itsClusterTree,0); |
87104b06 | 174 | Int_t rc; |
0b7bac55 | 175 | if(nolines>=2){ |
efe6147d | 176 | if(fSwitchAlgorithm) { |
177 | rc = Prepare3DVertexPbPb(); | |
178 | FindVertex3D(itsClusterTree); | |
179 | } else { | |
180 | rc=Prepare3DVertex(0); | |
181 | if(fVert3D.GetNContributors()>0){ | |
182 | fLines.Clear("C"); | |
183 | nolines = FindTracklets(itsClusterTree,1); | |
184 | if(nolines>=2){ | |
185 | rc=Prepare3DVertex(1); | |
186 | if(fPileupAlgo == 2 && rc == 0) FindVertex3DIterative(); | |
187 | else if(fPileupAlgo!=2 && rc == 0) FindVertex3D(itsClusterTree); | |
188 | if(rc!=0) fVert3D.SetNContributors(0); // exclude this vertex | |
189 | } | |
87104b06 | 190 | } |
191 | } | |
0b7bac55 | 192 | } |
6b4d9537 | 193 | |
0b7bac55 | 194 | if(!fCurrentVertex){ |
195 | AliITSVertexerZ vertz(GetNominalPos()[0],GetNominalPos()[1]); | |
b96ee725 | 196 | vertz.SetDetTypeRec(GetDetTypeRec()); |
0b7bac55 | 197 | AliDebug(1,"Call Vertexer Z\n"); |
cc282e54 | 198 | vertz.SetLowLimit(-fZCutDiamond); |
199 | vertz.SetHighLimit(fZCutDiamond); | |
0b7bac55 | 200 | AliESDVertex* vtxz = vertz.FindVertexForCurrentEvent(itsClusterTree); |
201 | if(vtxz){ | |
202 | Double_t position[3]={GetNominalPos()[0],GetNominalPos()[1],vtxz->GetZv()}; | |
203 | Double_t covmatrix[6]; | |
204 | vtxz->GetCovMatrix(covmatrix); | |
205 | Double_t chi2=99999.; | |
206 | Int_t nContr=vtxz->GetNContributors(); | |
207 | fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); | |
bf2e0ad4 | 208 | fCurrentVertex->SetDispersion(vtxz->GetDispersion()); |
0b7bac55 | 209 | fCurrentVertex->SetTitle("vertexer: Z"); |
210 | fCurrentVertex->SetName("SPDVertexZ"); | |
211 | delete vtxz; | |
0b7bac55 | 212 | } |
213 | ||
1ff24d0a | 214 | } |
215 | if(fComputeMultiplicity) FindMultiplicity(itsClusterTree); | |
70c95f95 | 216 | return fCurrentVertex; |
217 | } | |
218 | ||
6b4d9537 | 219 | //______________________________________________________________________ |
220 | void AliITSVertexer3D::FindVertex3D(TTree *itsClusterTree){ | |
f510fd70 | 221 | // Instantiates the fCurrentVertex object. calle by FindVertexForCurrenEvent |
0496a544 | 222 | Double_t vRadius=TMath::Sqrt(fVert3D.GetXv()*fVert3D.GetXv()+fVert3D.GetYv()*fVert3D.GetYv()); |
6b4d9537 | 223 | if(vRadius<GetPipeRadius() && fVert3D.GetNContributors()>0){ |
224 | Double_t position[3]={fVert3D.GetXv(),fVert3D.GetYv(),fVert3D.GetZv()}; | |
225 | Double_t covmatrix[6]; | |
226 | fVert3D.GetCovMatrix(covmatrix); | |
227 | Double_t chi2=99999.; | |
228 | Int_t nContr=fVert3D.GetNContributors(); | |
229 | fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); | |
230 | fCurrentVertex->SetTitle("vertexer: 3D"); | |
231 | fCurrentVertex->SetName("SPDVertex3D"); | |
232 | fCurrentVertex->SetDispersion(fVert3D.GetDispersion()); | |
233 | fNoVertices=1; | |
234 | ||
235 | switch(fPileupAlgo){ | |
236 | case 0: PileupFromZ(); break; | |
237 | case 1: FindOther3DVertices(itsClusterTree); break; | |
9ce18bbb | 238 | case 3: break; // no pileup algo |
6b4d9537 | 239 | default: AliError("Wrong pileup algorithm"); break; |
240 | } | |
241 | if(fNoVertices==1){ | |
242 | fVertArray = new AliESDVertex[1]; | |
243 | fVertArray[0]=(*fCurrentVertex); | |
244 | } | |
245 | } | |
246 | } | |
247 | ||
248 | //______________________________________________________________________ | |
249 | void AliITSVertexer3D::FindVertex3DIterative(){ | |
f510fd70 | 250 | // find vertex if fPileupAlgo == 2 |
87104b06 | 251 | |
252 | Int_t nLines=fLines.GetEntriesFast(); | |
253 | Int_t maxPoints=nLines*(nLines-1)/2; | |
254 | Double_t* xP=new Double_t[maxPoints]; | |
255 | Double_t* yP=new Double_t[maxPoints]; | |
256 | Double_t* zP=new Double_t[maxPoints]; | |
257 | Int_t* index1=new Int_t[maxPoints]; | |
258 | Int_t* index2=new Int_t[maxPoints]; | |
259 | Double_t xbeam=fVert3D.GetXv(); | |
260 | Double_t ybeam=fVert3D.GetYv(); | |
261 | ||
262 | Int_t iPoint=0; | |
263 | for(Int_t ilin1=0; ilin1<nLines; ilin1++){ | |
264 | AliStrLine *l1 = (AliStrLine*)fLines.At(ilin1); | |
265 | for(Int_t ilin2=ilin1+1; ilin2<nLines; ilin2++){ | |
266 | AliStrLine *l2 = (AliStrLine*)fLines.At(ilin2); | |
267 | Double_t dca=l1->GetDCA(l2); | |
268 | if(dca > fDCAcut || dca<0.00001) continue; | |
269 | Double_t point[3]; | |
270 | Int_t retc = l1->Cross(l2,point); | |
271 | if(retc<0)continue; | |
272 | Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]); | |
273 | if(rad>fCoarseMaxRCut)continue; | |
274 | Double_t distFromBeam=TMath::Sqrt((point[0]-xbeam)*(point[0]-xbeam)+(point[1]-ybeam)*(point[1]-ybeam)); | |
275 | if(distFromBeam>fMaxRCut2) continue; | |
276 | xP[iPoint]=point[0]; | |
277 | yP[iPoint]=point[1]; | |
278 | zP[iPoint]=point[2]; | |
279 | index1[iPoint]=ilin1; | |
280 | index2[iPoint]=ilin2; | |
281 | iPoint++; | |
282 | } | |
283 | } | |
284 | Int_t npoints=iPoint++; | |
285 | Int_t index=0; | |
286 | Short_t* mask=new Short_t[npoints]; | |
287 | for(Int_t ip=0;ip<npoints;ip++) mask[ip]=-1; | |
288 | ||
289 | for(Int_t ip1=0;ip1<npoints;ip1++){ | |
290 | if(mask[ip1]==-1) mask[ip1]=index++; | |
291 | for(Int_t ip2=ip1+1; ip2<npoints; ip2++){ | |
292 | if(mask[ip2]==mask[ip1] && mask[ip2]!=-1) continue; | |
293 | Double_t dist2=(xP[ip1]-xP[ip2])*(xP[ip1]-xP[ip2]); | |
294 | dist2+=(yP[ip1]-yP[ip2])*(yP[ip1]-yP[ip2]); | |
295 | dist2+=(zP[ip1]-zP[ip2])*(zP[ip1]-zP[ip2]); | |
296 | if(dist2<fCutOnPairs*fCutOnPairs){ | |
297 | if(mask[ip2]==-1) mask[ip2]=mask[ip1]; | |
298 | else{ | |
299 | for(Int_t ip=0; ip<npoints;ip++){ | |
300 | if(mask[ip]==mask[ip2]) mask[ip]=mask[ip1]; | |
301 | } | |
302 | } | |
303 | } | |
304 | } | |
305 | } | |
306 | ||
307 | ||
308 | // Count multiplicity of trackelts in clusters | |
309 | UInt_t* isIndUsed=new UInt_t[index+1]; | |
310 | for(Int_t ind=0;ind<index+1;ind++) isIndUsed[ind]=0; | |
311 | for(Int_t ip=0; ip<npoints;ip++){ | |
312 | Int_t ind=mask[ip]; | |
313 | isIndUsed[ind]++; | |
314 | } | |
315 | ||
316 | // Count clusters/vertices and sort according to multiplicity | |
317 | Int_t nClusters=0; | |
318 | Int_t* sortedIndex=new Int_t[index+1]; | |
319 | for(Int_t ind1=0;ind1<index+1;ind1++){ | |
320 | if(isIndUsed[ind1]<=1) isIndUsed[ind1]=0; | |
321 | else nClusters++; | |
322 | UInt_t cap=9999999; | |
323 | if(ind1>0) cap=isIndUsed[sortedIndex[ind1-1]]; | |
324 | UInt_t bigger=0; | |
325 | Int_t biggerindex=-1; | |
326 | for(Int_t ind2=0;ind2<index+1;ind2++){ | |
327 | Bool_t use=kTRUE; | |
328 | for(Int_t ind3=0; ind3<ind1; ind3++) | |
329 | if(ind2==sortedIndex[ind3]) use=kFALSE; | |
330 | if(use && isIndUsed[ind2]>bigger && isIndUsed[ind2]<=cap){ | |
331 | bigger=isIndUsed[ind2]; | |
332 | biggerindex=ind2; | |
333 | } | |
334 | } | |
335 | sortedIndex[ind1]=biggerindex; | |
336 | } | |
337 | AliDebug(3,Form("Number of clusters before merging = %d\n",nClusters)); | |
338 | ||
339 | // Assign lines to clusters/vertices and merge clusters which share 1 line | |
340 | Int_t nClustersAfterMerge=nClusters; | |
341 | Int_t* belongsTo=new Int_t[nLines]; | |
342 | for(Int_t ilin=0; ilin<nLines; ilin++) belongsTo[ilin]=-1; | |
343 | for(Int_t iclu=0;iclu<nClusters;iclu++){ | |
344 | Int_t actualCluIndex=iclu; | |
345 | for(Int_t ip=0; ip<npoints;ip++){ | |
346 | if(mask[ip]==sortedIndex[iclu]){ | |
347 | Int_t ind1=index1[ip]; | |
348 | if(belongsTo[ind1]==-1) belongsTo[ind1]=actualCluIndex; | |
349 | else if(belongsTo[ind1]<actualCluIndex){ | |
350 | Int_t newCluIndex=belongsTo[ind1]; | |
351 | for(Int_t ilin=0; ilin<nLines; ilin++){ | |
352 | if(belongsTo[ilin]==actualCluIndex) belongsTo[ilin]=newCluIndex; | |
353 | } | |
354 | AliDebug(10,Form("Merged cluster %d with %d\n",actualCluIndex,newCluIndex)); | |
355 | actualCluIndex=newCluIndex; | |
356 | nClustersAfterMerge--; | |
357 | } | |
358 | Int_t ind2=index2[ip]; | |
359 | if(belongsTo[ind2]==-1) belongsTo[ind2]=actualCluIndex; | |
360 | else if(belongsTo[ind2]<actualCluIndex){ | |
361 | Int_t newCluIndex=belongsTo[ind2]; | |
362 | for(Int_t ilin=0; ilin<nLines; ilin++){ | |
363 | if(belongsTo[ilin]==actualCluIndex) belongsTo[ilin]=newCluIndex; | |
364 | } | |
365 | AliDebug(10,Form("Merged cluster %d with %d\n",actualCluIndex,newCluIndex)); | |
366 | actualCluIndex=newCluIndex; | |
367 | nClustersAfterMerge--; | |
368 | } | |
369 | } | |
370 | } | |
371 | } | |
372 | AliDebug(3,Form("Number of clusters after merging = %d\n",nClustersAfterMerge)); | |
373 | ||
374 | // Count lines associated to each cluster/vertex | |
375 | UInt_t *cluSize=new UInt_t[nClusters]; | |
376 | for(Int_t iclu=0;iclu<nClusters;iclu++){ | |
377 | cluSize[iclu]=0; | |
378 | for(Int_t ilin=0; ilin<nLines; ilin++){ | |
379 | if(belongsTo[ilin]==iclu) cluSize[iclu]++; | |
380 | } | |
381 | } | |
382 | ||
383 | // Count good vertices (>1 associated tracklet) | |
384 | UInt_t nGoodVert=0; | |
385 | for(Int_t iclu=0;iclu<nClusters;iclu++){ | |
386 | AliDebug(3,Form("Vertex %d Size=%d\n",iclu,cluSize[iclu])); | |
387 | if(cluSize[iclu]>1) nGoodVert++; | |
388 | } | |
389 | ||
390 | AliDebug(1,Form("Number of good vertices = %d\n",nGoodVert)); | |
391 | // Calculate vertex coordinates for each cluster | |
392 | if(nGoodVert>0){ | |
393 | fVertArray = new AliESDVertex[nGoodVert]; | |
394 | Int_t iVert=0; | |
395 | for(Int_t iclu=0;iclu<nClusters;iclu++){ | |
396 | Int_t size=cluSize[iclu]; | |
397 | if(size>1){ | |
398 | AliStrLine **arrlin = new AliStrLine*[size]; | |
399 | Int_t nFilled=0; | |
400 | for(Int_t ilin=0; ilin<nLines; ilin++){ | |
401 | if(belongsTo[ilin]==iclu){ | |
402 | arrlin[nFilled++] = dynamic_cast<AliStrLine*>(fLines[ilin]); | |
403 | } | |
404 | } | |
405 | AliDebug(3,Form("Vertex %d N associated tracklets = %d out of %d\n",iVert,size,nFilled)); | |
406 | ||
407 | fVertArray[iVert]=AliVertexerTracks::TrackletVertexFinder(arrlin,nFilled); | |
408 | Double_t peak[3]; | |
409 | fVertArray[iVert].GetXYZ(peak); | |
410 | AliStrLine **arrlin2 = new AliStrLine*[size]; | |
411 | Int_t nFilled2=0; | |
412 | for(Int_t i=0; i<nFilled;i++){ | |
413 | AliStrLine *l1 = arrlin[i]; | |
414 | if(l1->GetDistFromPoint(peak)< fDCAcut) | |
415 | arrlin2[nFilled2++] = dynamic_cast<AliStrLine*>(l1); | |
416 | } | |
417 | if(nFilled2>1){ | |
418 | AliDebug(3,Form("Vertex %d recalculated with %d tracklets\n",iVert,nFilled2)); | |
419 | fVertArray[iVert]=AliVertexerTracks::TrackletVertexFinder(arrlin2,nFilled2); | |
420 | } | |
421 | delete [] arrlin; | |
422 | delete [] arrlin2; | |
423 | ++iVert; | |
424 | } | |
425 | } | |
426 | ||
427 | if(nGoodVert > 1){ | |
428 | fIsPileup = kTRUE; | |
429 | fNTrpuv = fVertArray[1].GetNContributors(); | |
430 | fZpuv = fVertArray[1].GetZv(); | |
431 | } | |
432 | ||
433 | Double_t vRadius=TMath::Sqrt(fVertArray[0].GetXv()*fVertArray[0].GetXv()+fVertArray[0].GetYv()*fVertArray[0].GetYv()); | |
434 | if(vRadius<GetPipeRadius() && fVertArray[0].GetNContributors()>0){ | |
435 | Double_t position[3]={fVertArray[0].GetXv(),fVertArray[0].GetYv(),fVertArray[0].GetZv()}; | |
436 | Double_t covmatrix[6]; | |
437 | fVertArray[0].GetCovMatrix(covmatrix); | |
438 | Double_t chi2=99999.; | |
439 | Int_t nContr=fVertArray[0].GetNContributors(); | |
440 | fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); | |
441 | fCurrentVertex->SetTitle("vertexer: 3D"); | |
442 | fCurrentVertex->SetName("SPDVertex3D"); | |
443 | fCurrentVertex->SetDispersion(fVertArray[0].GetDispersion()); | |
444 | } | |
445 | } | |
446 | ||
447 | delete [] index1; | |
448 | delete [] index2; | |
449 | delete [] mask; | |
450 | delete [] isIndUsed; | |
451 | delete [] sortedIndex; | |
452 | delete [] belongsTo; | |
453 | delete [] cluSize; | |
454 | delete [] xP; | |
455 | delete [] yP; | |
456 | delete [] zP; | |
457 | } | |
458 | //______________________________________________________________________ | |
459 | void AliITSVertexer3D::FindVertex3DIterativeMM(){ | |
6b4d9537 | 460 | // Defines the AliESDVertex for the current event |
461 | Int_t numsor=fLines.GetEntriesFast()*(fLines.GetEntriesFast()-1)/2; | |
462 | //cout<<"AliITSVertexer3D::FindVertexForCurentEvent: Number of tracklets selected for vertexing "<<fLines.GetEntriesFast()<<"; Number of pairs: "<<numsor<<endl; | |
463 | AliITSSortTrkl srt(fLines,numsor,fCutOnPairs,fCoarseMaxRCut); | |
464 | srt.FindClusters(); | |
465 | AliInfo(Form("Number of vertices: %d",srt.GetNumberOfClusters())); | |
466 | ||
467 | fNoVertices = srt.GetNumberOfClusters(); | |
468 | //printf("fNoVertices = %d \n",fNoVertices); | |
469 | if(fNoVertices>0){ | |
470 | fVertArray = new AliESDVertex[fNoVertices]; | |
471 | for(Int_t kk=0; kk<srt.GetNumberOfClusters(); kk++){ | |
472 | Int_t size = 0; | |
473 | Int_t *labels = srt.GetTrackletsLab(kk,size); | |
474 | /* | |
475 | Int_t *pairs = srt.GetClusters(kk); | |
476 | Int_t nopai = srt.GetSizeOfCluster(kk); | |
477 | cout<<"***** Vertex number "<<kk<<". Pairs: \n"; | |
478 | for(Int_t jj=0;jj<nopai;jj++){ | |
479 | cout<<pairs[jj]<<" - "; | |
480 | if(jj>0 & jj%8==0)cout<<endl; | |
481 | } | |
482 | cout<<endl; | |
483 | cout<<"***** Vertex number "<<kk<<". Labels: \n"; | |
484 | */ | |
485 | AliStrLine **tclo = new AliStrLine* [size]; | |
486 | for(Int_t jj=0;jj<size;jj++){ | |
487 | // cout<<labels[jj]<<" - "; | |
488 | // if(jj>0 & jj%8==0)cout<<endl; | |
489 | tclo[jj] = dynamic_cast<AliStrLine*>(fLines[labels[jj]]); | |
490 | } | |
491 | // cout<<endl; | |
492 | delete []labels; | |
493 | fVertArray[kk]=AliVertexerTracks::TrackletVertexFinder(tclo,size); | |
494 | delete [] tclo; | |
495 | // fVertArray[kk].PrintStatus(); | |
496 | if(kk == 1){ | |
497 | // at least one second vertex is present | |
498 | fIsPileup = kTRUE; | |
499 | fNTrpuv = fVertArray[kk].GetNContributors(); | |
500 | fZpuv = fVertArray[kk].GetZv(); | |
501 | } | |
502 | } | |
0496a544 | 503 | Double_t vRadius=TMath::Sqrt(fVertArray[0].GetXv()*fVertArray[0].GetXv()+fVertArray[0].GetYv()*fVertArray[0].GetYv()); |
6b4d9537 | 504 | if(vRadius<GetPipeRadius() && fVertArray[0].GetNContributors()>0){ |
505 | Double_t position[3]={fVertArray[0].GetXv(),fVertArray[0].GetYv(),fVertArray[0].GetZv()}; | |
506 | Double_t covmatrix[6]; | |
507 | fVertArray[0].GetCovMatrix(covmatrix); | |
508 | Double_t chi2=99999.; | |
509 | Int_t nContr=fVertArray[0].GetNContributors(); | |
510 | fCurrentVertex = new AliESDVertex(position,covmatrix,chi2,nContr); | |
511 | fCurrentVertex->SetTitle("vertexer: 3D"); | |
512 | fCurrentVertex->SetName("SPDVertex3D"); | |
513 | fCurrentVertex->SetDispersion(fVertArray[0].GetDispersion()); | |
514 | } | |
515 | } | |
516 | ||
517 | } | |
518 | ||
519 | //______________________________________________________________________ | |
520 | Bool_t AliITSVertexer3D::DistBetweenVertices(AliESDVertex &a, AliESDVertex &b, Double_t test, Double_t &dist){ | |
521 | // method to compare the distance between vertices a and b with "test" | |
522 | //it returns kTRUE is the distance is less or equal to test | |
523 | dist = (a.GetX()-b.GetX()) * (a.GetX()-b.GetX()); | |
524 | dist += (a.GetY()-b.GetY()) * (a.GetY()-b.GetY()); | |
525 | dist += (a.GetZ()-b.GetZ()) * (a.GetZ()-b.GetZ()); | |
526 | dist = TMath::Sqrt(dist); | |
527 | if(dist <= test)return kTRUE; | |
528 | return kFALSE; | |
529 | } | |
530 | ||
531 | ||
70c95f95 | 532 | //______________________________________________________________________ |
308c2f7c | 533 | Int_t AliITSVertexer3D::FindTracklets(TTree *itsClusterTree, Int_t optCuts){ |
70c95f95 | 534 | // All the possible combinations between recpoints on layer 1and 2 are |
535 | // considered. Straight lines (=tracklets)are formed. | |
536 | // The tracklets are processed in Prepare3DVertex | |
70c95f95 | 537 | |
70c95f95 | 538 | TClonesArray *itsRec = 0; |
cd1c2af1 | 539 | if(optCuts==0) fZHisto->Reset(); |
efe6147d | 540 | // gc1 are local and global coordinates for layer 1 |
0496a544 | 541 | Float_t gc1f[3]={0.,0.,0.}; |
542 | Double_t gc1[3]={0.,0.,0.}; | |
6b4d9537 | 543 | // gc2 are local and global coordinates for layer 2 |
0496a544 | 544 | Float_t gc2f[3]={0.,0.,0.}; |
545 | Double_t gc2[3]={0.,0.,0.}; | |
b21c1af0 | 546 | AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance(); |
3457dd2d | 547 | rpcont->FetchClusters(0,itsClusterTree); |
b21c1af0 | 548 | if(!rpcont->IsSPDActive()){ |
549 | AliWarning("No SPD rec points found, 3D vertex not calculated"); | |
6b4d9537 | 550 | return -1; |
551 | } | |
70c95f95 | 552 | |
553 | // Set values for cuts | |
0496a544 | 554 | Double_t xbeam=GetNominalPos()[0]; |
555 | Double_t ybeam=GetNominalPos()[1]; | |
556 | Double_t zvert=0.; | |
557 | Double_t deltaPhi=fCoarseDiffPhiCut; | |
558 | Double_t deltaR=fCoarseMaxRCut; | |
559 | Double_t dZmax=fZCutDiamond; | |
87104b06 | 560 | if(optCuts==1){ |
27167524 | 561 | xbeam=fVert3D.GetXv(); |
562 | ybeam=fVert3D.GetYv(); | |
563 | zvert=fVert3D.GetZv(); | |
70c95f95 | 564 | deltaPhi = fDiffPhiMax; |
05d1294c | 565 | deltaR=fMaxRCut; |
566 | dZmax=fMaxZCut; | |
87104b06 | 567 | if(fPileupAlgo == 2){ |
568 | dZmax=fZCutDiamond; | |
569 | deltaR=fMaxRCut2; | |
570 | } | |
6b4d9537 | 571 | } else if(optCuts==2){ |
cd1c2af1 | 572 | xbeam=fVert3D.GetXv(); |
573 | ybeam=fVert3D.GetYv(); | |
c238ba33 | 574 | deltaPhi = fDiffPhiforPileup; |
cd1c2af1 | 575 | deltaR=fMaxRCut; |
70c95f95 | 576 | } |
cd1c2af1 | 577 | |
efe6147d | 578 | fNRecPLay1=rpcont->GetNClustersInLayerFast(1); |
579 | fNRecPLay2=rpcont->GetNClustersInLayerFast(2); | |
580 | if(fNRecPLay1 == 0 || fNRecPLay2 == 0){ | |
581 | AliDebug(1,Form("No RecPoints in at least one SPD layer (%d %d)",fNRecPLay1,fNRecPLay2)); | |
70c95f95 | 582 | return -1; |
583 | } | |
efe6147d | 584 | AliDebug(1,Form("RecPoints on Layer 1,2 = %d, %d\n",fNRecPLay1,fNRecPLay2)); |
507265fd | 585 | fDoDownScale=kFALSE; |
efe6147d | 586 | fSwitchAlgorithm=kFALSE; |
587 | ||
507265fd | 588 | Float_t factDownScal=1.; |
589 | Int_t origLaddersOnLayer2=fLadOnLay2; | |
590 | ||
efe6147d | 591 | switch(fHighMultAlgo){ |
592 | case 0: | |
593 | if(fNRecPLay1>fMaxNumOfClForDownScale || fNRecPLay2>fMaxNumOfClForDownScale){ | |
594 | if(optCuts==2) return -1; // do not try to search for pileup | |
595 | SetLaddersOnLayer2(2); | |
596 | fDoDownScale=kTRUE; | |
597 | factDownScal=(Float_t)fMaxNumOfClForDownScale*(Float_t)fMaxNumOfClForDownScale/(Float_t)fNRecPLay1/(Float_t)fNRecPLay2; | |
598 | if(optCuts==1){ | |
599 | factDownScal*=(fCoarseDiffPhiCut/fDiffPhiMax)*10; | |
600 | if(factDownScal>1.){ | |
601 | fDoDownScale=kFALSE; | |
602 | SetLaddersOnLayer2(origLaddersOnLayer2); | |
603 | } | |
507265fd | 604 | } |
efe6147d | 605 | if(fDoDownScale)AliDebug(1,Form("Too many recpoints on SPD(%d %d ), downscale by %f",fNRecPLay1,fNRecPLay2,factDownScal)); |
606 | } | |
607 | break; | |
608 | case 1: | |
609 | if(fNRecPLay1>fMaxNumOfCl || fNRecPLay2>fMaxNumOfCl) { | |
610 | if(optCuts==2) return -1; // do not try to search for pileup | |
611 | fSwitchAlgorithm=kTRUE; | |
612 | } | |
613 | break; | |
614 | default: break; // no pileup algo | |
615 | } | |
616 | ||
617 | if(!fDoDownScale && !fSwitchAlgorithm){ | |
618 | if(fNRecPLay1>fMaxNumOfClForRebin || fNRecPLay2>fMaxNumOfClForRebin){ | |
619 | SetLaddersOnLayer2(2); | |
507265fd | 620 | } |
9801e044 | 621 | } |
70c95f95 | 622 | |
623 | Double_t a[3]={xbeam,ybeam,0.}; | |
624 | Double_t b[3]={xbeam,ybeam,10.}; | |
625 | AliStrLine zeta(a,b,kTRUE); | |
322e007a | 626 | static Double_t bField=TMath::Abs(AliTracker::GetBz()/10.); //T |
6a0d56b8 | 627 | SetMeanPPtSelTracks(bField); |
87104b06 | 628 | |
70c95f95 | 629 | Int_t nolines = 0; |
630 | // Loop on modules of layer 1 | |
32f7748d | 631 | Int_t firstL1 = TMath::Max(0,AliITSgeomTGeo::GetModuleIndex(1,1,1)); |
1cc75a0b | 632 | Int_t lastL1 = AliITSgeomTGeo::GetModuleIndex(2,1,1)-1; |
6a0d56b8 | 633 | for(Int_t modul1= firstL1; modul1<=lastL1;modul1++){ // Loop on modules of layer 1 |
8c42830a | 634 | if(!fUseModule[modul1]) continue; |
507265fd | 635 | |
410cfb90 | 636 | UShort_t ladder=modul1/4+1; // ladders are numbered starting from 1 |
b21c1af0 | 637 | TClonesArray *prpl1=rpcont->UncheckedGetClusters(modul1); |
638 | Int_t nrecp1 = prpl1->GetEntries(); | |
70c95f95 | 639 | for(Int_t j=0;j<nrecp1;j++){ |
cd1c2af1 | 640 | if(j>kMaxCluPerMod) continue; |
641 | UShort_t idClu1=modul1*kMaxCluPerMod+j; | |
642 | if(fUsedCluster.TestBitNumber(idClu1)) continue; | |
efe6147d | 643 | if(fDoDownScale && !fSwitchAlgorithm){ |
644 | if(fGenerForDownScale->Rndm()>factDownScal) continue; | |
645 | } | |
b21c1af0 | 646 | AliITSRecPoint *recp1 = (AliITSRecPoint*)prpl1->At(j); |
0496a544 | 647 | recp1->GetGlobalXYZ(gc1f); |
648 | for(Int_t ico=0;ico<3;ico++)gc1[ico]=gc1f[ico]; | |
649 | ||
6a0d56b8 | 650 | Double_t phi1 = TMath::ATan2(gc1[1]-ybeam,gc1[0]-xbeam); |
70c95f95 | 651 | if(phi1<0)phi1=2*TMath::Pi()+phi1; |
27167524 | 652 | for(Int_t ladl2=0 ; ladl2<fLadOnLay2*2+1;ladl2++){ |
653 | for(Int_t k=0;k<4;k++){ | |
654 | Int_t ladmod=fLadders[ladder-1]+ladl2; | |
32e63e47 | 655 | if(ladmod>AliITSgeomTGeo::GetNLadders(2)) ladmod=ladmod-AliITSgeomTGeo::GetNLadders(2); |
656 | Int_t modul2=AliITSgeomTGeo::GetModuleIndex(2,ladmod,k+1); | |
e917bef4 | 657 | if(modul2<0)continue; |
8c42830a | 658 | if(!fUseModule[modul2]) continue; |
b21c1af0 | 659 | itsRec=rpcont->UncheckedGetClusters(modul2); |
27167524 | 660 | Int_t nrecp2 = itsRec->GetEntries(); |
661 | for(Int_t j2=0;j2<nrecp2;j2++){ | |
cd1c2af1 | 662 | if(j2>kMaxCluPerMod) continue; |
663 | UShort_t idClu2=modul2*kMaxCluPerMod+j2; | |
664 | if(fUsedCluster.TestBitNumber(idClu2)) continue; | |
507265fd | 665 | |
6a0d56b8 | 666 | AliITSRecPoint *recp2 = (AliITSRecPoint*)itsRec->At(j2); |
0496a544 | 667 | recp2->GetGlobalXYZ(gc2f); |
668 | for(Int_t ico=0;ico<3;ico++)gc2[ico]=gc2f[ico]; | |
27167524 | 669 | Double_t phi2 = TMath::ATan2(gc2[1]-ybeam,gc2[0]-xbeam); |
670 | if(phi2<0)phi2=2*TMath::Pi()+phi2; | |
671 | Double_t diff = TMath::Abs(phi2-phi1); | |
672 | if(diff>TMath::Pi())diff=2.*TMath::Pi()-diff; | |
54091147 | 673 | if(optCuts==0 && diff<fDiffPhiforPileup){ |
0496a544 | 674 | Double_t r1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]); |
675 | Double_t zc1=gc1[2]; | |
676 | Double_t r2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]); | |
677 | Double_t zc2=gc2[2]; | |
678 | Double_t zr0=(r2*zc1-r1*zc2)/(r2-r1); //Z @ null radius | |
cd1c2af1 | 679 | fZHisto->Fill(zr0); |
680 | } | |
27167524 | 681 | if(diff>deltaPhi)continue; |
6a0d56b8 | 682 | AliStrLine line(gc1,gc2,kTRUE); |
27167524 | 683 | Double_t cp[3]; |
684 | Int_t retcode = line.Cross(&zeta,cp); | |
685 | if(retcode<0)continue; | |
686 | Double_t dca = line.GetDCA(&zeta); | |
687 | if(dca<0.) continue; | |
688 | if(dca>deltaR)continue; | |
689 | Double_t deltaZ=cp[2]-zvert; | |
690 | if(TMath::Abs(deltaZ)>dZmax)continue; | |
6a0d56b8 | 691 | |
507265fd | 692 | |
6a0d56b8 | 693 | if(nolines == 0){ |
f5f6da22 | 694 | if(fLines.GetEntriesFast()>0)fLines.Clear("C"); |
6a0d56b8 | 695 | } |
696 | Float_t cov[6]; | |
697 | recp2->GetGlobalCov(cov); | |
698 | ||
cd1c2af1 | 699 | |
0496a544 | 700 | Double_t rad1=TMath::Sqrt(gc1[0]*gc1[0]+gc1[1]*gc1[1]); |
701 | Double_t rad2=TMath::Sqrt(gc2[0]*gc2[0]+gc2[1]*gc2[1]); | |
702 | Double_t factor=(rad1+rad2)/(rad2-rad1); //factor to account for error on tracklet direction | |
6a0d56b8 | 703 | |
0496a544 | 704 | Double_t curvErr=0; |
6a0d56b8 | 705 | if(bField>0.00001){ |
0496a544 | 706 | Double_t curvRadius=fMeanPtSelTrk/(0.3*bField)*100; //cm |
440198c1 | 707 | Double_t dRad=TMath::Sqrt((gc1[0]-gc2[0])*(gc1[0]-gc2[0])+(gc1[1]-gc2[1])*(gc1[1]-gc2[1])); |
0496a544 | 708 | Double_t aux=dRad/2.+rad1; |
6a0d56b8 | 709 | curvErr=TMath::Sqrt(curvRadius*curvRadius-dRad*dRad/4.)-TMath::Sqrt(curvRadius*curvRadius-aux*aux); //cm |
710 | } | |
0496a544 | 711 | Double_t sigmasq[3]; |
6a0d56b8 | 712 | sigmasq[0]=(cov[0]+curvErr*curvErr/2.)*factor*factor; |
713 | sigmasq[1]=(cov[3]+curvErr*curvErr/2.)*factor*factor; | |
714 | sigmasq[2]=cov[5]*factor*factor; | |
715 | ||
716 | // Multiple scattering | |
0496a544 | 717 | Double_t pOverMass=fMeanPSelTrk/0.140; |
718 | Double_t beta2=pOverMass*pOverMass/(1+pOverMass*pOverMass); | |
719 | Double_t p2=fMeanPSelTrk*fMeanPSelTrk; | |
720 | Double_t rBP=GetPipeRadius(); | |
721 | Double_t dBP=0.08/35.3; // 800 um of Be | |
722 | Double_t dL1=0.01; //approx. 1% of radiation length | |
723 | Double_t theta2BP=14.1*14.1/(beta2*p2*1e6)*dBP; | |
724 | Double_t theta2L1=14.1*14.1/(beta2*p2*1e6)*dL1; | |
725 | Double_t rtantheta1=(rad2-rad1)*TMath::Tan(TMath::Sqrt(theta2L1)); | |
726 | Double_t rtanthetaBP=(rad1-rBP)*TMath::Tan(TMath::Sqrt(theta2BP)); | |
6a0d56b8 | 727 | for(Int_t ico=0; ico<3;ico++){ |
5951029f | 728 | sigmasq[ico]+=rtantheta1*rtantheta1*factor*factor/3.; |
729 | sigmasq[ico]+=rtanthetaBP*rtanthetaBP*factor*factor/3.; | |
6a0d56b8 | 730 | } |
0496a544 | 731 | Double_t wmat[9]={1.,0.,0.,0.,1.,0.,0.,0.,1.}; |
6a0d56b8 | 732 | if(sigmasq[0]!=0.) wmat[0]=1./sigmasq[0]; |
733 | if(sigmasq[1]!=0.) wmat[4]=1./sigmasq[1]; | |
734 | if(sigmasq[2]!=0.) wmat[8]=1./sigmasq[2]; | |
cd1c2af1 | 735 | new(fLines[nolines++])AliStrLine(gc1,sigmasq,wmat,gc2,kTRUE,idClu1,idClu2); |
6a0d56b8 | 736 | |
27167524 | 737 | } |
70c95f95 | 738 | } |
70c95f95 | 739 | } |
740 | } | |
70c95f95 | 741 | } |
507265fd | 742 | |
efe6147d | 743 | SetLaddersOnLayer2(origLaddersOnLayer2); |
507265fd | 744 | |
70c95f95 | 745 | if(nolines == 0)return -2; |
746 | return nolines; | |
747 | } | |
748 | ||
70c95f95 | 749 | //______________________________________________________________________ |
05d1294c | 750 | Int_t AliITSVertexer3D::Prepare3DVertex(Int_t optCuts){ |
70c95f95 | 751 | // Finds the 3D vertex information using tracklets |
752 | Int_t retcode = -1; | |
0496a544 | 753 | Double_t xbeam=GetNominalPos()[0]; |
754 | Double_t ybeam=GetNominalPos()[1]; | |
755 | Double_t zvert=0.; | |
756 | Double_t deltaR=fCoarseMaxRCut; | |
0496a544 | 757 | Double_t dZmax=fZCutDiamond; |
cd1c2af1 | 758 | if(optCuts==1){ |
27167524 | 759 | xbeam=fVert3D.GetXv(); |
760 | ybeam=fVert3D.GetYv(); | |
761 | zvert=fVert3D.GetZv(); | |
05d1294c | 762 | deltaR=fMaxRCut; |
763 | dZmax=fMaxZCut; | |
87104b06 | 764 | if(fPileupAlgo == 2){ |
765 | dZmax=fZCutDiamond; | |
766 | deltaR=fMaxRCut2; | |
767 | } | |
cd1c2af1 | 768 | }else if(optCuts==2){ |
769 | xbeam=fVert3D.GetXv(); | |
770 | ybeam=fVert3D.GetYv(); | |
771 | deltaR=fMaxRCut; | |
05d1294c | 772 | } |
773 | ||
507265fd | 774 | Double_t origBinSizeR=fBinSizeR; |
775 | Double_t origBinSizeZ=fBinSizeZ; | |
efe6147d | 776 | Bool_t rebinned=kFALSE; |
507265fd | 777 | if(fDoDownScale){ |
778 | SetBinSizeR(0.05); | |
779 | SetBinSizeZ(0.05); | |
efe6147d | 780 | rebinned=kTRUE; |
781 | }else{ | |
782 | if(optCuts==0 && (fNRecPLay1>fMaxNumOfClForRebin || fNRecPLay2>fMaxNumOfClForRebin)){ | |
783 | SetBinSizeR(0.1); | |
784 | SetBinSizeZ(0.2); | |
785 | rebinned=kTRUE; | |
786 | } | |
507265fd | 787 | } |
0496a544 | 788 | Double_t rl=-fCoarseMaxRCut; |
789 | Double_t rh=fCoarseMaxRCut; | |
790 | Double_t zl=-fZCutDiamond; | |
791 | Double_t zh=fZCutDiamond; | |
7d766abb | 792 | Int_t nbr=(Int_t)((rh-rl)/fBinSizeR+0.0001); |
793 | Int_t nbz=(Int_t)((zh-zl)/fBinSizeZ+0.0001); | |
794 | Int_t nbrcs=(Int_t)((rh-rl)/(fBinSizeR*2.)+0.0001); | |
795 | Int_t nbzcs=(Int_t)((zh-zl)/(fBinSizeZ*2.)+0.0001); | |
796 | ||
87104b06 | 797 | TH3F *h3d = new TH3F("h3d","xyz distribution",nbr,rl,rh,nbr,rl,rh,nbz,zl,zh); |
798 | TH3F *h3dcs = new TH3F("h3dcs","xyz distribution",nbrcs,rl,rh,nbrcs,rl,rh,nbzcs,zl,zh); | |
799 | ||
70c95f95 | 800 | // cleanup of the TCLonesArray of tracklets (i.e. fakes are removed) |
3457dd2d | 801 | Int_t vsiz = fLines.GetEntriesFast(); |
802 | Int_t *validate = new Int_t [vsiz]; | |
803 | for(Int_t i=0; i<vsiz;i++)validate[i]=0; | |
804 | for(Int_t i=0; i<vsiz-1;i++){ | |
f5f6da22 | 805 | AliStrLine *l1 = (AliStrLine*)fLines.At(i); |
806 | for(Int_t j=i+1;j<fLines.GetEntriesFast();j++){ | |
807 | AliStrLine *l2 = (AliStrLine*)fLines.At(j); | |
0496a544 | 808 | Double_t dca=l1->GetDCA(l2); |
05d1294c | 809 | if(dca > fDCAcut || dca<0.00001) continue; |
70c95f95 | 810 | Double_t point[3]; |
811 | Int_t retc = l1->Cross(l2,point); | |
812 | if(retc<0)continue; | |
6a0d56b8 | 813 | Double_t deltaZ=point[2]-zvert; |
efe6147d | 814 | if(TMath::Abs(deltaZ)>dZmax)continue; |
70c95f95 | 815 | Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]); |
05d1294c | 816 | if(rad>fCoarseMaxRCut)continue; |
817 | Double_t deltaX=point[0]-xbeam; | |
818 | Double_t deltaY=point[1]-ybeam; | |
05d1294c | 819 | Double_t raddist=TMath::Sqrt(deltaX*deltaX+deltaY*deltaY); |
05d1294c | 820 | if(raddist>deltaR)continue; |
27167524 | 821 | validate[i]=1; |
822 | validate[j]=1; | |
87104b06 | 823 | h3d->Fill(point[0],point[1],point[2]); |
824 | h3dcs->Fill(point[0],point[1],point[2]); | |
70c95f95 | 825 | } |
826 | } | |
827 | ||
70c95f95 | 828 | Int_t numbtracklets=0; |
3457dd2d | 829 | for(Int_t i=0; i<vsiz;i++)if(validate[i]>=1)numbtracklets++; |
6b4d9537 | 830 | if(numbtracklets<2){ |
831 | delete [] validate; | |
87104b06 | 832 | delete h3d; |
833 | delete h3dcs; | |
efe6147d | 834 | SetBinSizeR(origBinSizeR); |
835 | SetBinSizeZ(origBinSizeZ); | |
6b4d9537 | 836 | return retcode; |
837 | } | |
70c95f95 | 838 | |
f5f6da22 | 839 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ |
840 | if(validate[i]<1)fLines.RemoveAt(i); | |
70c95f95 | 841 | } |
f5f6da22 | 842 | fLines.Compress(); |
843 | AliDebug(1,Form("Number of tracklets (after compress)%d ",fLines.GetEntriesFast())); | |
70c95f95 | 844 | delete [] validate; |
845 | ||
87104b06 | 846 | // Exit here if Pileup Algorithm 2 has been chosen during second loop |
847 | if(fPileupAlgo == 2 && optCuts==1){ | |
848 | delete h3d; | |
849 | delete h3dcs; | |
efe6147d | 850 | SetBinSizeR(origBinSizeR); |
851 | SetBinSizeZ(origBinSizeZ); | |
87104b06 | 852 | return 0; |
853 | } | |
6b4d9537 | 854 | |
7340864d | 855 | // Find peaks in histos |
05d1294c | 856 | |
70c95f95 | 857 | Double_t peak[3]={0.,0.,0.}; |
7340864d | 858 | Int_t ntrkl,ntimes; |
859 | FindPeaks(h3d,peak,ntrkl,ntimes); | |
70c95f95 | 860 | delete h3d; |
0496a544 | 861 | Double_t binsizer=(rh-rl)/nbr; |
862 | Double_t binsizez=(zh-zl)/nbz; | |
7d766abb | 863 | if(optCuts==0 && (ntrkl<=2 || ntimes>1)){ |
7340864d | 864 | ntrkl=0; |
865 | ntimes=0; | |
866 | FindPeaks(h3dcs,peak,ntrkl,ntimes); | |
867 | binsizer=(rh-rl)/nbrcs; | |
868 | binsizez=(zh-zl)/nbzcs; | |
efe6147d | 869 | if(ntrkl==1 || ntimes>1){ |
870 | delete h3dcs; | |
871 | SetBinSizeR(origBinSizeR); | |
872 | SetBinSizeZ(origBinSizeZ); | |
873 | return retcode; | |
874 | } | |
7340864d | 875 | } |
876 | delete h3dcs; | |
877 | ||
efe6147d | 878 | Double_t bs=(binsizer+binsizez)/2.; |
879 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ | |
880 | AliStrLine *l1 = (AliStrLine*)fLines.At(i); | |
881 | if(l1->GetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i); | |
882 | } | |
883 | fLines.Compress(); | |
884 | AliDebug(1,Form("Number of tracklets (after 2nd compression) %d",fLines.GetEntriesFast())); | |
885 | ||
507265fd | 886 | // Finer Histo in limited range in case of high mult. |
efe6147d | 887 | if(rebinned){ |
507265fd | 888 | SetBinSizeR(0.01); |
889 | SetBinSizeZ(0.01); | |
890 | Double_t xl=peak[0]-0.3; | |
891 | Double_t xh=peak[0]+0.3; | |
892 | Double_t yl=peak[1]-0.3; | |
893 | Double_t yh=peak[1]+0.3; | |
894 | zl=peak[2]-0.5; | |
895 | zh=peak[2]+0.5; | |
896 | Int_t nbxfs=(Int_t)((xh-xl)/fBinSizeR+0.0001); | |
897 | Int_t nbyfs=(Int_t)((yh-yl)/fBinSizeR+0.0001); | |
898 | Int_t nbzfs=(Int_t)((zh-zl)/fBinSizeZ+0.0001); | |
899 | ||
900 | TH3F *h3dfs = new TH3F("h3dfs","xyz distribution",nbxfs,xl,xh,nbyfs,yl,yh,nbzfs,zl,zh); | |
901 | for(Int_t i=0; i<fLines.GetEntriesFast()-1;i++){ | |
902 | AliStrLine *l1 = (AliStrLine*)fLines.At(i); | |
903 | for(Int_t j=i+1;j<fLines.GetEntriesFast();j++){ | |
904 | AliStrLine *l2 = (AliStrLine*)fLines.At(j); | |
efe6147d | 905 | Double_t dca=l1->GetDCA(l2); |
906 | if(dca > fDCAcut || dca<0.00001) continue; | |
507265fd | 907 | Double_t point[3]; |
908 | Int_t retc = l1->Cross(l2,point); | |
909 | if(retc<0)continue; | |
efe6147d | 910 | Double_t deltaZ=point[2]-zvert; |
911 | if(TMath::Abs(deltaZ)>dZmax)continue; | |
912 | Double_t rad=TMath::Sqrt(point[0]*point[0]+point[1]*point[1]); | |
913 | if(rad>fCoarseMaxRCut)continue; | |
914 | Double_t deltaX=point[0]-xbeam; | |
915 | Double_t deltaY=point[1]-ybeam; | |
916 | Double_t raddist=TMath::Sqrt(deltaX*deltaX+deltaY*deltaY); | |
917 | if(raddist>deltaR)continue; | |
507265fd | 918 | h3dfs->Fill(point[0],point[1],point[2]); |
919 | } | |
920 | } | |
921 | ntrkl=0; | |
922 | ntimes=0; | |
923 | ||
924 | Double_t newpeak[3]={0.,0.,0.}; | |
925 | FindPeaks(h3dfs,newpeak,ntrkl,ntimes); | |
926 | if(ntimes==1){ | |
927 | for(Int_t iCoo=0; iCoo<3; iCoo++) peak[iCoo]=newpeak[iCoo]; | |
928 | binsizer=fBinSizeR; | |
929 | binsizez=fBinSizeZ; | |
930 | } | |
931 | delete h3dfs; | |
efe6147d | 932 | bs=(binsizer+binsizez)/2.; |
933 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ | |
934 | AliStrLine *l1 = (AliStrLine*)fLines.At(i); | |
935 | if(l1->GetDistFromPoint(peak)>2.5*bs)fLines.RemoveAt(i); | |
936 | } | |
937 | fLines.Compress(); | |
938 | AliDebug(1,Form("Number of tracklets (after 3rd compression) %d",fLines.GetEntriesFast())); | |
507265fd | 939 | } |
efe6147d | 940 | SetBinSizeR(origBinSizeR); |
941 | SetBinSizeZ(origBinSizeZ); | |
507265fd | 942 | |
943 | ||
70c95f95 | 944 | // Second selection loop |
7340864d | 945 | |
70c95f95 | 946 | |
f5f6da22 | 947 | if(fLines.GetEntriesFast()>1){ |
2ecf7a6f | 948 | retcode=0; |
27167524 | 949 | // find a first candidate for the primary vertex |
f5f6da22 | 950 | fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); |
70c95f95 | 951 | // make a further selection on tracklets based on this first candidate |
27167524 | 952 | fVert3D.GetXYZ(peak); |
953 | AliDebug(1,Form("FIRST V candidate: %f ; %f ; %f",peak[0],peak[1],peak[2])); | |
410cfb90 | 954 | Int_t *validate2 = new Int_t [fLines.GetEntriesFast()]; |
955 | for(Int_t i=0; i<fLines.GetEntriesFast();i++) validate2[i]=1; | |
f5f6da22 | 956 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ |
410cfb90 | 957 | if(validate2[i]==0) continue; |
f5f6da22 | 958 | AliStrLine *l1 = (AliStrLine*)fLines.At(i); |
959 | if(l1->GetDistFromPoint(peak)> fDCAcut)fLines.RemoveAt(i); | |
410cfb90 | 960 | if(optCuts==2){ // temporarily only for pileup |
961 | for(Int_t j=i+1; j<fLines.GetEntriesFast();j++){ | |
962 | AliStrLine *l2 = (AliStrLine*)fLines.At(j); | |
963 | if(l1->GetDCA(l2)<0.00001){ | |
964 | Int_t delta1=(Int_t)l1->GetIdPoint(0)-(Int_t)l2->GetIdPoint(0); | |
965 | Int_t delta2=(Int_t)l1->GetIdPoint(1)-(Int_t)l2->GetIdPoint(1); | |
966 | Int_t deltamod1=(Int_t)l1->GetIdPoint(0)/kMaxCluPerMod | |
967 | -(Int_t)l2->GetIdPoint(0)/kMaxCluPerMod; | |
968 | Int_t deltamod2=(Int_t)l1->GetIdPoint(1)/kMaxCluPerMod | |
969 | -(Int_t)l2->GetIdPoint(1)/kMaxCluPerMod; | |
970 | // remove tracklets sharing a point | |
971 | if( (delta1==0 && deltamod2==0) || | |
972 | (delta2==0 && deltamod1==0) ) validate2[j]=0; | |
973 | } | |
974 | } | |
975 | } | |
70c95f95 | 976 | } |
410cfb90 | 977 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ |
978 | if(validate2[i]==0) fLines.RemoveAt(i); | |
979 | } | |
980 | delete [] validate2; | |
f5f6da22 | 981 | fLines.Compress(); |
982 | AliDebug(1,Form("Number of tracklets (after 3rd compression) %d",fLines.GetEntriesFast())); | |
2ecf7a6f | 983 | if(fLines.GetEntriesFast()>1){// this new tracklet selection is used |
984 | fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); | |
985 | } | |
70c95f95 | 986 | } |
987 | return retcode; | |
988 | } | |
989 | ||
efe6147d | 990 | //________________________________________________________ |
991 | Int_t AliITSVertexer3D::Prepare3DVertexPbPb(){ | |
992 | // Finds the 3D vertex information in Pb-Pb events using tracklets | |
993 | AliDebug(1,"High multiplicity event.\n"); | |
994 | ||
995 | Int_t nxy=(Int_t)(2.*fCoarseMaxRCut/f3DBinSize); | |
996 | Double_t xymi= -nxy*f3DBinSize/2.; | |
997 | Double_t xyma= nxy*f3DBinSize/2.; | |
998 | Int_t nz=(Int_t)(2.*fZCutDiamond/f3DBinSize); | |
999 | Double_t zmi=-nz*f3DBinSize/2.; | |
1000 | Double_t zma=nz*f3DBinSize/2.; | |
1001 | Int_t nolines=fLines.GetEntriesFast(); | |
1002 | TH3F *h3dv = new TH3F("h3dv","3d tracklets",nxy,xymi,xyma,nxy,xymi,xyma,nz,zmi,zma); | |
1003 | ||
1004 | for(Int_t itra=0; itra<nolines; itra++){ | |
1005 | Double_t wei = GetFraction(itra); | |
1006 | //printf("tracklet %d ) - weight %f \n",itra,wei); | |
1007 | if(wei>1.e-6){ | |
1008 | AliStrLine *str=(AliStrLine*)fLines.At(itra); | |
1009 | Double_t t1,t2; | |
1010 | if(str->GetParamAtRadius(fCoarseMaxRCut,t1,t2)){ | |
1011 | do{ | |
1012 | Double_t punt[3]; | |
1013 | str->ComputePointAtT(t1,punt); | |
1014 | h3dv->Fill(punt[0],punt[1],punt[2],wei); | |
1015 | t1+=f3DBinSize/3.; | |
1016 | } while(t1<t2); | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | Int_t noftrk,noftim; | |
1021 | FindPeaks(h3dv,f3DPeak,noftrk,noftim); // arg: histo3d, peak, # of contrib., # of other peak with same magnitude | |
1022 | ||
1023 | ||
1024 | // Remove all the tracklets which are not passing near peak | |
1025 | ||
1026 | while(nolines--){ | |
1027 | AliStrLine *str=(AliStrLine*)fLines.At(nolines); | |
1028 | Double_t dist = str->GetDistFromPoint(f3DPeak); | |
1029 | if(dist>(2.*f3DBinSize)) fLines.RemoveAt(nolines); | |
1030 | } | |
1031 | fLines.Compress(); | |
1032 | nolines=fLines.GetEntriesFast(); | |
1033 | ||
1034 | delete h3dv; | |
1035 | ||
1036 | Int_t *validate2 = new Int_t [fLines.GetEntriesFast()]; | |
1037 | for(Int_t i=0; i<fLines.GetEntriesFast();i++) validate2[i]=1; | |
1038 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ | |
1039 | if(validate2[i]==0) continue; | |
1040 | AliStrLine *l1 = (AliStrLine*)fLines.At(i); | |
1041 | if(l1->GetDistFromPoint(f3DPeak)> fDCAcut)fLines.RemoveAt(i); | |
1042 | for(Int_t j=i+1; j<fLines.GetEntriesFast();j++){ | |
1043 | AliStrLine *l2 = (AliStrLine*)fLines.At(j); | |
1044 | if(l1->GetDCA(l2)<0.00001){ | |
1045 | Int_t delta1=(Int_t)l1->GetIdPoint(0)-(Int_t)l2->GetIdPoint(0); | |
1046 | Int_t delta2=(Int_t)l1->GetIdPoint(1)-(Int_t)l2->GetIdPoint(1); | |
1047 | Int_t deltamod1=(Int_t)l1->GetIdPoint(0)/kMaxCluPerMod | |
1048 | -(Int_t)l2->GetIdPoint(0)/kMaxCluPerMod; | |
1049 | Int_t deltamod2=(Int_t)l1->GetIdPoint(1)/kMaxCluPerMod | |
1050 | -(Int_t)l2->GetIdPoint(1)/kMaxCluPerMod; | |
1051 | // remove tracklets sharing a point | |
1052 | if( (delta1==0 && deltamod2==0) || | |
1053 | (delta2==0 && deltamod1==0) ) validate2[j]=0; | |
1054 | ||
1055 | } | |
1056 | } | |
1057 | } | |
1058 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ | |
1059 | if(validate2[i]==0) fLines.RemoveAt(i); | |
1060 | } | |
1061 | ||
1062 | delete [] validate2; | |
1063 | fLines.Compress(); | |
1064 | ||
1065 | ||
1066 | AliDebug(1,Form("Number of tracklets (after 3rd compression) %d",fLines.GetEntriesFast())); | |
1067 | ||
1068 | fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); | |
1069 | fVert3D.GetXYZ(f3DPeak); | |
1070 | ||
1071 | return 0; | |
1072 | } | |
1073 | ||
6a0d56b8 | 1074 | //________________________________________________________ |
0496a544 | 1075 | void AliITSVertexer3D::SetMeanPPtSelTracks(Double_t fieldTesla){ |
5951029f | 1076 | // Sets mean values of Pt based on the field |
1077 | // for P (used in multiple scattering) the most probable value is used | |
6a0d56b8 | 1078 | if(TMath::Abs(fieldTesla-0.5)<0.01){ |
5951029f | 1079 | SetMeanPSelTracks(0.375); |
6a0d56b8 | 1080 | SetMeanPtSelTracks(0.630); |
1081 | }else if(TMath::Abs(fieldTesla-0.4)<0.01){ | |
5951029f | 1082 | SetMeanPSelTracks(0.375); |
6a0d56b8 | 1083 | SetMeanPtSelTracks(0.580); |
1084 | }else if(TMath::Abs(fieldTesla-0.2)<0.01){ | |
5951029f | 1085 | SetMeanPSelTracks(0.375); |
6a0d56b8 | 1086 | SetMeanPtSelTracks(0.530); |
1087 | }else if(fieldTesla<0.00001){ | |
5951029f | 1088 | SetMeanPSelTracks(0.375); |
1089 | SetMeanPtSelTracks(0.230); | |
6a0d56b8 | 1090 | }else{ |
1091 | SetMeanPSelTracks(); | |
1092 | SetMeanPtSelTracks(); | |
70c95f95 | 1093 | } |
70c95f95 | 1094 | } |
1095 | ||
7340864d | 1096 | //________________________________________________________ |
1097 | void AliITSVertexer3D::FindPeaks(TH3F* histo, Double_t *peak, Int_t &nOfTracklets, Int_t &nOfTimes){ | |
1098 | // Finds bin with max contents in 3D histo of tracket intersections | |
1099 | TAxis *xax = histo->GetXaxis(); | |
1100 | TAxis *yax = histo->GetYaxis(); | |
1101 | TAxis *zax = histo->GetZaxis(); | |
1102 | peak[0]=0.; | |
1103 | peak[1]=0.; | |
1104 | peak[2]=0.; | |
1105 | nOfTracklets = 0; | |
1106 | nOfTimes=0; | |
7d766abb | 1107 | Int_t peakbin[3]={0,0,0}; |
1108 | Int_t peak2bin[3]={-1,-1,-1}; | |
1109 | Int_t bc2=-1; | |
7340864d | 1110 | for(Int_t i=xax->GetFirst();i<=xax->GetLast();i++){ |
242c8025 | 1111 | Double_t xval = xax->GetBinCenter(i); |
7340864d | 1112 | for(Int_t j=yax->GetFirst();j<=yax->GetLast();j++){ |
242c8025 | 1113 | Double_t yval = yax->GetBinCenter(j); |
7340864d | 1114 | for(Int_t k=zax->GetFirst();k<=zax->GetLast();k++){ |
242c8025 | 1115 | Double_t zval = zax->GetBinCenter(k); |
7340864d | 1116 | Int_t bc =(Int_t)histo->GetBinContent(i,j,k); |
7d766abb | 1117 | if(bc==0) continue; |
7340864d | 1118 | if(bc>nOfTracklets){ |
7d766abb | 1119 | nOfTracklets=bc; |
7340864d | 1120 | peak[2] = zval; |
1121 | peak[1] = yval; | |
1122 | peak[0] = xval; | |
7d766abb | 1123 | peakbin[2] = k; |
1124 | peakbin[1] = j; | |
1125 | peakbin[0] = i; | |
1126 | peak2bin[2] = -1; | |
1127 | peak2bin[1] = -1; | |
1128 | peak2bin[0] = -1; | |
1129 | bc2=-1; | |
7340864d | 1130 | nOfTimes = 1; |
06a7cbee | 1131 | }else if(bc==nOfTracklets){ |
7d766abb | 1132 | if(TMath::Abs(i-peakbin[0])<=1 && TMath::Abs(j-peakbin[1])<=1 && TMath::Abs(k-peakbin[2])<=1){ |
1133 | peak2bin[2] = k; | |
1134 | peak2bin[1] = j; | |
1135 | peak2bin[0] = i; | |
1136 | bc2=bc; | |
1137 | nOfTimes = 1; | |
1138 | }else{ | |
1139 | nOfTimes++; | |
1140 | } | |
7340864d | 1141 | } |
1142 | } | |
1143 | } | |
1144 | } | |
7d766abb | 1145 | if(peak2bin[0]>=-1 && bc2!=-1){ // two contiguous peak-cells with same contents |
1146 | peak[0]=0.5*(xax->GetBinCenter(peakbin[0])+xax->GetBinCenter(peak2bin[0])); | |
1147 | peak[1]=0.5*(yax->GetBinCenter(peakbin[1])+yax->GetBinCenter(peak2bin[1])); | |
1148 | peak[2]=0.5*(zax->GetBinCenter(peakbin[2])+zax->GetBinCenter(peak2bin[2])); | |
1149 | nOfTracklets+=bc2; | |
1150 | nOfTimes=1; | |
1151 | } | |
7340864d | 1152 | } |
cd1c2af1 | 1153 | //________________________________________________________ |
1154 | void AliITSVertexer3D::MarkUsedClusters(){ | |
1155 | // Mark clusters of tracklets used in vertex claulation | |
1156 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ | |
1157 | AliStrLine *lin = (AliStrLine*)fLines.At(i); | |
1158 | Int_t idClu1=lin->GetIdPoint(0); | |
1159 | Int_t idClu2=lin->GetIdPoint(1); | |
1160 | fUsedCluster.SetBitNumber(idClu1); | |
1161 | fUsedCluster.SetBitNumber(idClu2); | |
1162 | } | |
1163 | } | |
1164 | //________________________________________________________ | |
1165 | Int_t AliITSVertexer3D::RemoveTracklets(){ | |
1166 | // Remove trackelts close to first found vertex | |
1167 | Double_t vert[3]={fVert3D.GetXv(),fVert3D.GetYv(),fVert3D.GetZv()}; | |
1168 | Int_t nRemoved=0; | |
1169 | for(Int_t i=0; i<fLines.GetEntriesFast();i++){ | |
1170 | AliStrLine *lin = (AliStrLine*)fLines.At(i); | |
1171 | if(lin->GetDistFromPoint(vert)<fDCAforPileup){ | |
1172 | Int_t idClu1=lin->GetIdPoint(0); | |
1173 | Int_t idClu2=lin->GetIdPoint(1); | |
1174 | fUsedCluster.SetBitNumber(idClu1); | |
1175 | fUsedCluster.SetBitNumber(idClu2); | |
1176 | fLines.RemoveAt(i); | |
1177 | ++nRemoved; | |
1178 | } | |
1179 | } | |
1180 | fLines.Compress(); | |
1181 | return nRemoved; | |
1182 | } | |
1183 | //________________________________________________________ | |
1184 | void AliITSVertexer3D::FindOther3DVertices(TTree *itsClusterTree){ | |
1185 | // pileup identification based on 3D vertexing with not used clusters | |
72756d8d | 1186 | |
1187 | fVertArray = new AliESDVertex[kMaxPileupVertices+1]; | |
1188 | fVertArray[0]=(*fCurrentVertex); | |
1189 | Int_t nFoundVert=1; | |
1190 | for(Int_t iPilV=1; iPilV<=kMaxPileupVertices; iPilV++){ | |
1191 | MarkUsedClusters(); | |
1192 | fLines.Clear("C"); | |
1193 | Int_t nolines = FindTracklets(itsClusterTree,2); | |
cd1c2af1 | 1194 | if(nolines>=2){ |
72756d8d | 1195 | Int_t nr=RemoveTracklets(); |
1196 | nolines-=nr; | |
1197 | if(nolines>=2){ | |
1198 | Int_t rc=Prepare3DVertex(2); | |
1199 | if(rc==0){ | |
1200 | fVert3D=AliVertexerTracks::TrackletVertexFinder(&fLines,0); | |
1201 | if(fVert3D.GetNContributors()>=fMinTrackletsForPilup){ | |
1202 | fIsPileup=kTRUE; | |
1203 | fVertArray[nFoundVert]=fVert3D; | |
1204 | nFoundVert++; | |
1205 | if(nFoundVert==2){ | |
1206 | fZpuv=fVert3D.GetZv(); | |
1207 | fNTrpuv=fVert3D.GetNContributors(); | |
1208 | } | |
1209 | } | |
cd1c2af1 | 1210 | } |
1211 | } | |
1212 | } | |
1213 | } | |
72756d8d | 1214 | fNoVertices=nFoundVert; |
cd1c2af1 | 1215 | } |
1216 | //______________________________________________________________________ | |
1217 | void AliITSVertexer3D::PileupFromZ(){ | |
1218 | // Calls the pileup algorithm of ALiITSVertexerZ | |
1219 | Int_t binmin, binmax; | |
1220 | Int_t nPeaks=AliITSVertexerZ::GetPeakRegion(fZHisto,binmin,binmax); | |
1221 | if(nPeaks==2)AliWarning("2 peaks found"); | |
1222 | Int_t firstPeakCont=0; | |
242c8025 | 1223 | Double_t firstPeakPos=0.; |
cd1c2af1 | 1224 | for(Int_t i=binmin-1;i<=binmax+1;i++){ |
6b4d9537 | 1225 | firstPeakCont+=static_cast<Int_t>(fZHisto->GetBinContent(i)); |
cd1c2af1 | 1226 | firstPeakPos+=fZHisto->GetBinContent(i)*fZHisto->GetBinCenter(i); |
1227 | } | |
73315c4a | 1228 | if(firstPeakCont>0){ |
1229 | firstPeakPos/=firstPeakCont; | |
1230 | Int_t ncontr2=0; | |
1231 | if(firstPeakCont>fMinTrackletsForPilup){ | |
1232 | Float_t secPeakPos; | |
1233 | ncontr2=AliITSVertexerZ::FindSecondPeak(fZHisto,binmin,binmax,secPeakPos); | |
1234 | if(ncontr2>=fMinTrackletsForPilup){ | |
1235 | fIsPileup=kTRUE; | |
6b4d9537 | 1236 | fNoVertices=2; |
1237 | AliESDVertex secondVert(secPeakPos,0.1,ncontr2); | |
1238 | fVertArray = new AliESDVertex[2]; | |
1239 | fVertArray[0]=(*fCurrentVertex); | |
1240 | fVertArray[1]=secondVert; | |
73315c4a | 1241 | fZpuv=secPeakPos; |
1242 | fNTrpuv=ncontr2; | |
1243 | } | |
cd1c2af1 | 1244 | } |
1245 | } | |
1246 | } | |
efe6147d | 1247 | |
1248 | //________________________________________________________ | |
1249 | Double_t AliITSVertexer3D::GetFraction(Int_t itr) const { | |
1250 | // this method is used to fill a 3D histogram representing | |
1251 | // the trajectories of the candidate tracklets | |
1252 | // The computed fraction is used as a weight at filling time | |
1253 | AliStrLine *str = (AliStrLine*)fLines.At(itr); | |
1254 | Double_t spigolo=10.; | |
1255 | Double_t cd[3]; | |
1256 | str->GetCd(cd); | |
1257 | Double_t par=0.; | |
1258 | Double_t maxl=TMath::Sqrt(3.)*spigolo; | |
1259 | // intersection with a plane normal to the X axis | |
1260 | if(TMath::AreEqualAbs(cd[0],0.,1.e-9)){ | |
1261 | par=1000000.; | |
1262 | } | |
1263 | else { | |
1264 | par=spigolo/cd[0]; | |
1265 | } | |
1266 | Double_t zc=cd[2]*par; | |
1267 | Double_t yc=cd[1]*par; | |
1268 | if((-spigolo<=yc && yc<=spigolo) && (-spigolo<=zc && zc<=spigolo))return TMath::Abs(par/maxl); | |
1269 | // intersection with a plane normal to the Y axis | |
1270 | if(TMath::AreEqualAbs(cd[1],0.,1.e-9)){ | |
1271 | par=1000000.; | |
1272 | } | |
1273 | else { | |
1274 | par=spigolo/cd[1]; | |
1275 | } | |
1276 | zc=cd[2]*par; | |
1277 | Double_t xc=cd[0]*par; | |
1278 | if((-spigolo<=xc && xc<=spigolo) && (-spigolo<=zc && zc<=spigolo))return TMath::Abs(par/maxl); | |
1279 | // intersection with a plane normal to the Z axis | |
1280 | if(TMath::AreEqualAbs(cd[2],0.,1.e-9)){ | |
1281 | par=1000000.; | |
1282 | } | |
1283 | else { | |
1284 | par=spigolo/cd[2]; | |
1285 | } | |
1286 | yc=cd[1]*par; | |
1287 | xc=cd[0]*par; | |
1288 | if((-spigolo<=xc && xc<=spigolo) && (-spigolo<=yc && yc<=spigolo))return TMath::Abs(par/maxl); | |
1289 | // control should never reach the following lines | |
1290 | AliError(Form("anomalous tracklet direction for tracklet %d in fLines\n",itr)); | |
1291 | str->PrintStatus(); | |
1292 | return 0.; | |
1293 | } | |
1294 | ||
70c95f95 | 1295 | //________________________________________________________ |
1296 | void AliITSVertexer3D::PrintStatus() const { | |
1297 | // Print current status | |
87104b06 | 1298 | printf("========= First step selections =====================\n"); |
6a0d56b8 | 1299 | printf("Cut on diamond (Z) %f\n",fZCutDiamond); |
87104b06 | 1300 | printf("Loose cut on Delta Phi %f\n",fCoarseDiffPhiCut); |
1301 | printf("Loose cut on tracklet DCA to Z axis %f\n",fCoarseMaxRCut); | |
6a0d56b8 | 1302 | printf("Cut on DCA - tracklet to tracklet and to vertex %f\n",fDCAcut); |
87104b06 | 1303 | printf("========= Second step selections ====================\n"); |
1304 | printf("Cut on tracklet-to-first-vertex Z distance %f\n",fMaxZCut); | |
cd1c2af1 | 1305 | printf("Max Phi difference: %f\n",fDiffPhiMax); |
87104b06 | 1306 | printf("Cut on tracklet DCA to beam axis %f\n",fMaxRCut); |
1307 | printf("Cut on tracklet DCA to beam axis (algo2) %f\n",fMaxRCut2); | |
1308 | printf("========= Pileup selections =========================\n"); | |
cd1c2af1 | 1309 | printf("Pileup algo: %d\n",fPileupAlgo); |
87104b06 | 1310 | printf("Min DCA to 1st vertex for pileup (algo 0 and 1): %f\n",fDCAforPileup); |
1311 | printf("Cut on distance between pair-vertices (algo 2): %f\n",fCutOnPairs); | |
efe6147d | 1312 | printf("Maximum number of clusters on L1 or L2 for downscale: %d\n",fMaxNumOfClForDownScale); |
1313 | printf("Maximum number of clusters on L1 or L2 for histo rebin: %d\n",fMaxNumOfClForRebin); | |
6a0d56b8 | 1314 | printf("=======================================================\n"); |
70c95f95 | 1315 | } |
410cfb90 | 1316 |