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cd90f0a2 1/**************************************************************************\r
2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *\r
3 * *\r
4 * Author: The ALICE Off-line Project. *\r
5 * Contributors are mentioned in the code where appropriate. *\r
6 * *\r
7 * Permission to use, copy, modify and distribute this software and its *\r
8 * documentation strictly for non-commercial purposes is hereby granted *\r
9 * without fee, provided that the above copyright notice appears in all *\r
10 * copies and that both the copyright notice and this permission notice *\r
11 * appear in the supporting documentation. The authors make no claims *\r
12 * about the suitability of this software for any purpose. It is *\r
13 * provided "as is" without express or implied warranty. *\r
14 **************************************************************************/\r
15/* $Id$ */\r
16\r
17//-------------------------------------------------------------------------\r
18// Implementation of the on-the-fly v0 finder for ITS tracker MI\r
19// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch \r
20// Extraction from AliITStrackerMI: Andrea Dainese\r
21// Current support and development: \r
22//-------------------------------------------------------------------------\r
23\r
24#include <TMatrixD.h>\r
25#include <TTree.h>\r
26#include <TString.h>\r
27#include <TRandom.h>\r
28#include <TTreeStream.h>\r
29\r
30\r
31#include "AliLog.h"\r
32#include "AliESDVertex.h"\r
33#include "AliESDEvent.h"\r
34#include "AliESDtrack.h"\r
35#include "AliV0.h"\r
36#include "AliHelix.h"\r
37#include "AliITSRecPoint.h"\r
38#include "AliITSReconstructor.h"\r
39#include "AliITStrackerMI.h"\r
40#include "AliITSV0Finder.h"\r
767aaecb 41#include "AliKFParticle.h"\r
61673d36 42#include "AliKFVertex.h"\r
cd90f0a2 43\r
44ClassImp(AliITSV0Finder)\r
45\r
767aaecb 46\r
47AliITSV0Finder::AliITSV0Finder():\r
48fDebugStreamer(0)\r
49 {\r
cd90f0a2 50 //Default constructor\r
767aaecb 51\r
c0b60eb0 52 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0)\r
53 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");\r
767aaecb 54} \r
55\r
cd90f0a2 56//------------------------------------------------------------------------\r
57void AliITSV0Finder::UpdateTPCV0(const AliESDEvent *event,\r
58 AliITStrackerMI *tracker)\r
59{\r
60 //\r
61 //try to update, or reject TPC V0s\r
62 //\r
767aaecb 63 const Float_t kMinTgl2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl2();\r
64\r
cd90f0a2 65 TObjArray *trackHypothesys = tracker->GetTrackHypothesys();\r
66\r
67 Int_t nv0s = event->GetNumberOfV0s();\r
68 Int_t nitstracks = trackHypothesys->GetEntriesFast();\r
69\r
70 for (Int_t i=0;i<nv0s;i++){\r
71 AliESDv0 * vertex = event->GetV0(i);\r
72 Int_t ip = vertex->GetIndex(0);\r
73 Int_t im = vertex->GetIndex(1);\r
74 //\r
75 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)trackHypothesys->At(ip):0;\r
76 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)trackHypothesys->At(im):0;\r
77 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;\r
78 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;\r
79 //\r
80 //\r
81 if (trackp){\r
82 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){\r
83 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);\r
84 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100); \r
85 }\r
86 }\r
87\r
88 if (trackm){\r
89 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){\r
90 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);\r
91 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100); \r
92 }\r
93 }\r
94 if (vertex->GetStatus()==-100) continue;\r
95 //\r
96 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.\r
97 Int_t clayer = tracker->GetNearestLayer(xrp); //I.B.\r
98 vertex->SetNBefore(clayer); //\r
99 vertex->SetChi2Before(9*clayer); //\r
100 vertex->SetNAfter(6-clayer); //\r
101 vertex->SetChi2After(0); //\r
102 //\r
103 if (clayer >1 ){ // calculate chi2 before vertex\r
104 Float_t chi2p = 0, chi2m=0; \r
105 //\r
106 if (trackp){\r
107 for (Int_t ilayer=0;ilayer<clayer;ilayer++){\r
108 if (trackp->GetClIndex(ilayer)>=0){\r
109 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+\r
110 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));\r
111 }\r
112 else{\r
113 chi2p+=9;\r
114 }\r
115 }\r
116 }else{\r
117 chi2p = 9*clayer;\r
118 }\r
119 //\r
120 if (trackm){\r
121 for (Int_t ilayer=0;ilayer<clayer;ilayer++){\r
122 if (trackm->GetClIndex(ilayer)>=0){\r
123 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+\r
124 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));\r
125 }\r
126 else{\r
127 chi2m+=9;\r
128 }\r
129 }\r
130 }else{\r
131 chi2m = 9*clayer;\r
132 }\r
133 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));\r
134 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex\r
135 }\r
136 \r
137 if (clayer < 5 ){ // calculate chi2 after vertex\r
138 Float_t chi2p = 0, chi2m=0; \r
139 //\r
767aaecb 140 if (trackp&&TMath::Abs(trackp->GetTgl())<kMinTgl2){\r
cd90f0a2 141 for (Int_t ilayer=clayer;ilayer<6;ilayer++){\r
142 if (trackp->GetClIndex(ilayer)>=0){\r
143 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+\r
144 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));\r
145 }\r
146 else{\r
147 chi2p+=9;\r
148 }\r
149 }\r
150 }else{\r
151 chi2p = 0;\r
152 }\r
153 //\r
767aaecb 154 if (trackm&&TMath::Abs(trackm->GetTgl())<kMinTgl2){\r
cd90f0a2 155 for (Int_t ilayer=clayer;ilayer<6;ilayer++){\r
156 if (trackm->GetClIndex(ilayer)>=0){\r
157 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+\r
158 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));\r
159 }\r
160 else{\r
161 chi2m+=9;\r
162 }\r
163 }\r
164 }else{\r
165 chi2m = 0;\r
166 }\r
167 vertex->SetChi2After(TMath::Max(chi2p,chi2m));\r
168 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS\r
169 }\r
170 }\r
171 //\r
172}\r
173//------------------------------------------------------------------------\r
174void AliITSV0Finder::FindV02(AliESDEvent *event,\r
175 AliITStrackerMI *tracker) \r
176{\r
177 //\r
178 // V0 finder\r
179 //\r
180 // Cuts on DCA - R dependent\r
181 // max distance DCA between 2 tracks cut \r
182 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);\r
183 //\r
767aaecb 184 const Float_t kMaxDist0 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist0();\r
185 const Float_t kMaxDist1 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist1();\r
186 const Float_t kMaxDist = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist();\r
187 const Float_t kMinPointAngle = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle();\r
188 const Float_t kMinPointAngle2 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle2();\r
189 const Float_t kMinR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinR();\r
190 const Float_t kMaxR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxR();\r
61673d36 191 const Float_t kMinPABestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPABestConst();\r
192 const Float_t kMaxRBestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRBestConst();\r
767aaecb 193 const Float_t kCausality0Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCausality0Cut();\r
194 const Float_t kLikelihood01Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood01Cut();\r
195 const Float_t kLikelihood1Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood1Cut();\r
196 const Float_t kCombinedCut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCombinedCut();\r
b47f2a3f 197 const Float_t kMinClFullTrk= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClFullTrk();\r
767aaecb 198 const Float_t kMinTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl0();\r
61673d36 199 const Float_t kMinRTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTgl0();\r
200\r
201 const Float_t kMinNormDistForbTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbTgl0();\r
202 const Float_t kMinClForb0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClForb0();\r
203 const Float_t kMinNormDistForb1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb1();\r
204 const Float_t kMinNormDistForb2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb2();\r
205 const Float_t kMinNormDistForb3= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb3();\r
206 const Float_t kMinNormDistForb4= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb4();\r
207 const Float_t kMinNormDistForb5= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb5();\r
83052b75 208 const Float_t kMinNormDistForbProt= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbProt();\r
209 const Float_t kMaxPidProbPionForb= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxPidProbPionForb();\r
61673d36 210\r
211 const Float_t kMinRTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTPCdensity();\r
212 const Float_t kMaxRTPCdensity0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity0();\r
213 const Float_t kMaxRTPCdensity10= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity10();\r
214 const Float_t kMaxRTPCdensity20= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity20();\r
215 const Float_t kMaxRTPCdensity30= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity30();\r
216\r
217\r
767aaecb 218 const Float_t kMinTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTPCdensity();\r
219 const Float_t kMinTgl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl1();\r
220\r
221 const Float_t kMinchi2before0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before0();\r
222 const Float_t kMinchi2before1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before1();\r
223 const Float_t kMinchi2after0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after0();\r
224 const Float_t kMinchi2after1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after1();\r
225 const Float_t kAddchi2SharedCl= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2SharedCl();\r
226 const Float_t kAddchi2NegCl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl0();\r
227 const Float_t kAddchi2NegCl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl1();\r
228\r
229 const Float_t kSigp0Par0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par0();\r
230 const Float_t kSigp0Par1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par1();\r
231 const Float_t kSigp0Par2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par2();\r
232\r
233 const Float_t kSigpPar0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar0();\r
234 const Float_t kSigpPar1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar1();\r
235 const Float_t kSigpPar2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar2();\r
61673d36 236 const Float_t kMaxDcaLh0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDcaLh0();\r
237\r
cd90f0a2 238\r
239 TObjArray *trackHypothesys = tracker->GetTrackHypothesys();\r
240 TObjArray *bestHypothesys = tracker->GetBestHypothesys();\r
241 TObjArray *originalTracks = tracker->GetOriginal();\r
242 //\r
243 //\r
244 TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
245 Int_t ntracks = event->GetNumberOfTracks(); \r
246 Int_t nitstracks = trackHypothesys->GetEntriesFast();\r
247 originalTracks->Expand(ntracks);\r
248 trackHypothesys->Expand(ntracks);\r
249 bestHypothesys->Expand(ntracks);\r
250 //\r
251 AliHelix * helixes = new AliHelix[ntracks+2];\r
252 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain\r
253 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain\r
254 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain\r
61673d36 255 //Change from Bool_t to Int_t for optimization\r
256 // Int_t forbN=0;\r
257 // Int_t * forbidden = new Int_t [ntracks+2];\r
cd90f0a2 258 Bool_t * forbidden = new Bool_t [ntracks+2];\r
259 Int_t *itsmap = new Int_t [ntracks+2];\r
260 Float_t *dist = new Float_t[ntracks+2];\r
261 Float_t *normdist0 = new Float_t[ntracks+2];\r
262 Float_t *normdist1 = new Float_t[ntracks+2];\r
263 Float_t *normdist = new Float_t[ntracks+2];\r
264 Float_t *norm = new Float_t[ntracks+2];\r
265 Float_t *maxr = new Float_t[ntracks+2];\r
266 Float_t *minr = new Float_t[ntracks+2];\r
267 Float_t *minPointAngle= new Float_t[ntracks+2];\r
268 //\r
269 AliV0 *pvertex = new AliV0;\r
270 AliITStrackMI * dummy= new AliITStrackMI;\r
271 dummy->SetLabel(0);\r
272 AliITStrackMI trackat0; //temporary track for DCA calculation\r
273 //\r
274 Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
275 //\r
276 // make ITS - ESD map\r
277 //\r
278 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {\r
279 itsmap[itrack] = -1;\r
61673d36 280 // forbidden[itrack] = 0;\r
cd90f0a2 281 forbidden[itrack] = kFALSE;\r
282 maxr[itrack] = kMaxR;\r
283 minr[itrack] = kMinR;\r
284 minPointAngle[itrack] = kMinPointAngle;\r
285 }\r
286 for (Int_t itrack=0;itrack<nitstracks;itrack++){\r
287 AliITStrackMI * original = (AliITStrackMI*)(originalTracks->At(itrack));\r
288 Int_t esdindex = original->GetESDtrack()->GetID();\r
289 itsmap[esdindex] = itrack;\r
290 }\r
291 //\r
292 // create ITS tracks from ESD tracks if not done before\r
293 //\r
294 for (Int_t itrack=0;itrack<ntracks;itrack++){\r
295 if (itsmap[itrack]>=0) continue;\r
296 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));\r
297 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());\r
298 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ(); \r
299 tpctrack->GetDZ(tracker->GetX(),tracker->GetY(),tracker->GetZ(),tpctrack->GetDP()); //I.B.\r
300 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){\r
301 // tracks which can reach inner part of ITS\r
302 // propagate track to outer its volume - with correction for material\r
303 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(tpctrack); \r
304 }\r
305 itsmap[itrack] = nitstracks;\r
306 originalTracks->AddAt(tpctrack,nitstracks);\r
307 nitstracks++;\r
308 }\r
309 //\r
310 // fill temporary arrays\r
311 //\r
312 for (Int_t itrack=0;itrack<ntracks;itrack++){\r
313 AliESDtrack * esdtrack = event->GetTrack(itrack);\r
314 Int_t itsindex = itsmap[itrack];\r
315 AliITStrackMI *original = (AliITStrackMI*)originalTracks->At(itsmap[itrack]);\r
316 if (!original) continue;\r
317 AliITStrackMI *bestConst = 0;\r
318 AliITStrackMI *bestLong = 0;\r
319 AliITStrackMI *best = 0; \r
320 //\r
321 //\r
322 TObjArray * array = (TObjArray*) trackHypothesys->At(itsindex);\r
323 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();\r
324 // Get best track with vertex constrain\r
325 for (Int_t ih=0;ih<hentries;ih++){\r
326 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
327 if (!trackh->GetConstrain()) continue;\r
328 if (!bestConst) bestConst = trackh;\r
61673d36 329 if (trackh->GetNumberOfClusters()>kMinClFullTrk ){\r
cd90f0a2 330 bestConst = trackh; // full track - with minimal chi2\r
331 break;\r
332 }\r
333 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue; \r
334 bestConst = trackh;\r
335 break;\r
336 }\r
337 // Get best long track without vertex constrain and best track without vertex constrain\r
338 for (Int_t ih=0;ih<hentries;ih++){\r
339 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
340 if (trackh->GetConstrain()) continue;\r
341 if (!best) best = trackh;\r
342 if (!bestLong) bestLong = trackh;\r
b47f2a3f 343 if (trackh->GetNumberOfClusters()>kMinClFullTrk){\r
cd90f0a2 344 bestLong = trackh; // full track - with minimal chi2\r
345 break;\r
346 }\r
347 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue; \r
348 bestLong = trackh; \r
349 }\r
350 if (!best) {\r
351 best = original;\r
352 bestLong = original;\r
353 }\r
354 //I.B. trackat0 = *bestLong;\r
355 new (&trackat0) AliITStrackMI(*bestLong);\r
356 Double_t xx,yy,zz,alpha; \r
357 if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;\r
61673d36 358 \r
359\r
cd90f0a2 360 alpha = TMath::ATan2(yy,xx); \r
361 // if (!trackat0.Propagate(alpha,0)) continue; \r
362 trackat0.Propagate(alpha,0); //PH The check on the return value is temporarily disabled (bug 45751) \r
363 // calculate normalized distances to the vertex \r
364 //\r
365 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));\r
366 if ( bestLong->GetNumberOfClusters()>3 ){ \r
367 dist[itsindex] = trackat0.GetY();\r
368 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
369 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
370 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
371 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
372 if (!bestConst){\r
373 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;\r
374 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;\r
375 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;\r
376 }else{\r
377 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;\r
378 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;\r
379 }\r
380 }\r
381 else{ \r
382 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){\r
383 dist[itsindex] = bestConst->GetD(0);\r
384 norm[itsindex] = bestConst->GetDnorm(0);\r
385 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
386 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
387 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
388 }else{\r
389 dist[itsindex] = trackat0.GetY();\r
390 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
391 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
392 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
393 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
767aaecb 394 if (TMath::Abs(trackat0.GetTgl())>kMinTgl0){\r
61673d36 395 if (normdist[itsindex]<kMinNormDistForbTgl0){\r
396 // forbN=1;\r
397 // forbidden[itsindex]+=1<<forbN;\r
398 forbidden[itsindex]=kTRUE;\r
399 }\r
400 if (normdist[itsindex]>kMinNormDistForbTgl0) {\r
401 minr[itsindex] = TMath::Max(kMinRTgl0,minr[itsindex]);\r
cd90f0a2 402 }\r
403 }\r
404 }\r
405 }\r
61673d36 406\r
407\r
cd90f0a2 408 //\r
409 //-----------------------------------------------------------\r
410 //Forbid primary track candidates - \r
411 //\r
412 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");\r
413 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");\r
414 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");\r
415 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");\r
416 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");\r
417 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");\r
418 //-----------------------------------------------------------\r
419 if (bestConst){\r
61673d36 420 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>kMinClForb0){\r
421 // forbN=2;\r
422 // forbidden[itsindex]+=1<<forbN;\r
423 forbidden[itsindex]=kTRUE;\r
424 }\r
425 if (normdist[itsindex]<kMinNormDistForb1 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5){\r
426 // forbN=3;\r
427 // forbidden[itsindex]+=1<<forbN;\r
428 forbidden[itsindex]=kTRUE;\r
429 }\r
430 if (normdist[itsindex]<kMinNormDistForb2 && bestConst->GetClIndex(0)>=0 && bestConst->GetClIndex(1)>=0 ){\r
431 // forbN=4;\r
432 // forbidden[itsindex]+=1<<forbN;\r
433 forbidden[itsindex]=kTRUE;\r
434 }\r
435 if (normdist[itsindex]<kMinNormDistForb3 && bestConst->GetClIndex(0)>=0){\r
436 // forbN=5;\r
437 // forbidden[itsindex]+=1<<forbN;\r
438 forbidden[itsindex]=kTRUE;\r
439 }\r
440 if (normdist[itsindex]<kMinNormDistForb4 && bestConst->GetNormChi2(0)<2){\r
441 // forbN=6;\r
442 // forbidden[itsindex]+=1<<forbN;\r
443 forbidden[itsindex]=kTRUE;\r
444 }\r
445 if (normdist[itsindex]<kMinNormDistForb5 && bestConst->GetNormChi2(0)<1){\r
446 // forbN=7;\r
447 // forbidden[itsindex]+=1<<forbN;\r
448 forbidden[itsindex]=kTRUE;\r
449 }\r
cd90f0a2 450 if (bestConst->GetNormChi2(0)<2.5) {\r
61673d36 451 minPointAngle[itsindex]= kMinPABestConst;\r
452 maxr[itsindex] = kMaxRBestConst;\r
cd90f0a2 453 }\r
454 }\r
455 //\r
456 //forbid daughter kink candidates\r
457 //\r
458 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;\r
459 Bool_t isElectron = kTRUE;\r
460 Bool_t isProton = kTRUE;\r
461 Double_t pid[5];\r
462 esdtrack->GetESDpid(pid);\r
463 for (Int_t i=1;i<5;i++){\r
464 if (pid[0]<pid[i]) isElectron= kFALSE;\r
465 if (pid[4]<pid[i]) isProton= kFALSE;\r
466 }\r
467 if (isElectron){\r
468 forbidden[itsindex]=kFALSE; \r
469 normdist[itsindex]*=-1;\r
470 }\r
471 if (isProton){\r
83052b75 472 if (normdist[itsindex]>kMinNormDistForbProt) forbidden[itsindex]=kFALSE; \r
cd90f0a2 473 normdist[itsindex]*=-1;\r
474 }\r
475\r
83052b75 476 // We allow all tracks that are not pions\r
477 if( (pid[1]+pid[2])< kMaxPidProbPionForb ){\r
478 forbidden[itsindex]=kFALSE;\r
479 }\r
480\r
cd90f0a2 481 //\r
482 // Causality cuts in TPC volume\r
483 //\r
61673d36 484 if (esdtrack->GetTPCdensity(0,10) >kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity0),maxr[itsindex]);\r
485 if (esdtrack->GetTPCdensity(10,30)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity10),maxr[itsindex]);\r
486 if (esdtrack->GetTPCdensity(20,40)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity20),maxr[itsindex]);\r
487 if (esdtrack->GetTPCdensity(30,50)>kMinTPCdensity) maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity30),maxr[itsindex]);\r
cd90f0a2 488 //\r
61673d36 489 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=kMinRTPCdensity; \r
cd90f0a2 490 //\r
491 //\r
61673d36 492\r
767aaecb 493 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){\r
cd90f0a2 494 cstream<<"Track"<<\r
495 "Tr0.="<<best<<\r
496 "Tr1.="<<((bestConst)? bestConst:dummy)<<\r
497 "Tr2.="<<bestLong<<\r
498 "Tr3.="<<&trackat0<<\r
499 "Esd.="<<esdtrack<<\r
500 "Dist="<<dist[itsindex]<<\r
501 "ND0="<<normdist0[itsindex]<<\r
502 "ND1="<<normdist1[itsindex]<<\r
503 "ND="<<normdist[itsindex]<<\r
504 "Pz="<<primvertex[2]<<\r
505 "Forbid="<<forbidden[itsindex]<<\r
506 "\n";\r
507 //\r
508 }\r
509 trackarray.AddAt(best,itsindex);\r
510 trackarrayc.AddAt(bestConst,itsindex);\r
511 trackarrayl.AddAt(bestLong,itsindex);\r
512 new (&helixes[itsindex]) AliHelix(*best);\r
513 }\r
514 //\r
515 //\r
516 //\r
517 // first iterration of V0 finder\r
518 //\r
61673d36 519 // AM Comment out for optimization\r
520 // Int_t rejectBase=0;\r
521 // Int_t cutN=0;\r
767aaecb 522\r
cd90f0a2 523 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){\r
524 Int_t itrack0 = itsmap[iesd0];\r
61673d36 525 //-AM comment for optimization and store the forbidden value in the debug streamer\r
cd90f0a2 526 if (forbidden[itrack0]) continue;\r
527 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);\r
528 if (!btrack0) continue; \r
cd90f0a2 529 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);\r
530 //\r
531 for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){\r
532 Int_t itrack1 = itsmap[iesd1];\r
61673d36 533 //-AM comment for optimization and store the forbidden value in the debug streamer\r
cd90f0a2 534 if (forbidden[itrack1]) continue;\r
535\r
536 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1); \r
537 if (!btrack1) continue;\r
61673d36 538\r
539 if ( (btrack0->GetSign()==btrack1->GetSign()) && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;\r
540\r
cd90f0a2 541 Bool_t isGold = kFALSE;\r
542 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){\r
543 isGold = kTRUE;\r
544 }\r
61673d36 545 // rejectBase=0;\r
cd90f0a2 546 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);\r
547 AliHelix &h1 = helixes[itrack0];\r
548 AliHelix &h2 = helixes[itrack1];\r
549 //\r
550 // find linear distance\r
551 Double_t rmin =0;\r
552 //\r
553 //\r
554 //\r
555 Double_t phase[2][2],radius[2];\r
556 Int_t points = h1.GetRPHIintersections(h2, phase, radius);\r
61673d36 557 if (points==0) {\r
558 // cutN=1;\r
559 // rejectBase+=1<<cutN;\r
560 continue;\r
561 }\r
cd90f0a2 562 Double_t delta[2]={1000000,1000000}; \r
563 rmin = radius[0];\r
564 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);\r
565 if (points==2){ \r
566 if (radius[1]<rmin) rmin = radius[1];\r
567 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);\r
568 }\r
569 rmin = TMath::Sqrt(rmin);\r
570 Double_t distance = 0;\r
571 Double_t radiusC = 0;\r
572 Int_t iphase = 0;\r
573 if (points==1 || delta[0]<delta[1]){\r
574 distance = TMath::Sqrt(delta[0]);\r
575 radiusC = TMath::Sqrt(radius[0]);\r
576 }else{\r
577 distance = TMath::Sqrt(delta[1]);\r
578 radiusC = TMath::Sqrt(radius[1]);\r
579 iphase=1;\r
580 }\r
61673d36 581 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])){\r
582 // cutN=2;\r
583 //rejectBase+=1<<cutN;\r
584 continue;\r
585 }\r
586 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])){\r
587 // cutN=3;\r
588 // rejectBase+=1<<cutN;\r
589 continue;\r
590 } \r
cd90f0a2 591 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1)); \r
61673d36 592 if (distance>maxDist){\r
593 // cutN=4;\r
594 // rejectBase+=1<<cutN;\r
595 continue;\r
596 }\r
cd90f0a2 597 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);\r
61673d36 598 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) {\r
599 // cutN=5;\r
600 // rejectBase+=1<<cutN;\r
601 continue;\r
602 }\r
cd90f0a2 603 //\r
604 //\r
605 // Double_t distance = TestV0(h1,h2,pvertex,rmin);\r
606 //\r
607 // if (distance>maxDist) continue;\r
608 // if (pvertex->GetRr()<kMinR) continue;\r
609 // if (pvertex->GetRr()>kMaxR) continue;\r
610 AliITStrackMI * track0=btrack0;\r
611 AliITStrackMI * track1=btrack1;\r
612 // if (pvertex->GetRr()<3.5){ \r
613 if (radiusC<3.5){ \r
614 //use longest tracks inside the pipe\r
615 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);\r
616 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);\r
617 } \r
618 //\r
619 //\r
767aaecb 620 \r
621\r
622 \r
cd90f0a2 623 pvertex->SetParamN(*track0);\r
624 pvertex->SetParamP(*track1);\r
625 pvertex->Update(primvertex);\r
626 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters\r
627\r
61673d36 628 // Define gamma, K0, lambda and lambda_bar from the decay particles and calculate the chi2 \r
629 AliKFVertex vertexKF;\r
630\r
631 vertexKF.X() = tracker->GetX();\r
632 vertexKF.Y() = tracker->GetY();\r
633 vertexKF.Z() = tracker->GetZ();\r
634 vertexKF.Covariance(0,0) = tracker->GetSigmaX()*tracker->GetSigmaX();\r
635 vertexKF.Covariance(1,2) = tracker->GetSigmaY()*tracker->GetSigmaY();\r
636 vertexKF.Covariance(2,2) = tracker->GetSigmaZ()*tracker->GetSigmaZ();\r
637 \r
638 AliKFParticle elecKF( *(pvertex->GetParamN()) ,11);\r
639 AliKFParticle posiKF( *(pvertex->GetParamP()) ,-11);\r
640 AliKFParticle pipKF( *(pvertex->GetParamN()) , 211);\r
641 AliKFParticle pinKF( *(pvertex->GetParamP()) ,-211);\r
642 AliKFParticle protKF( *(pvertex->GetParamP()) ,2212);\r
643 AliKFParticle aproKF ( *(pvertex->GetParamN()) ,-2212);\r
644\r
645\r
646 // Gamma\r
647 AliKFParticle gamKF(elecKF,posiKF);\r
648 gamKF.SetProductionVertex(vertexKF);\r
649\r
650 Float_t gamKFchi2 = 1000;\r
651 if ( gamKF.GetNDF()!=0 ){\r
652 gamKFchi2 = gamKF.GetChi2()/gamKF.GetNDF();\r
653 }\r
654\r
655 Float_t massG=0.;\r
656 Float_t sigmaMG=0.001;\r
657 gamKF.SetMassConstraint(massG,sigmaMG);\r
658\r
659 Float_t gamKFchi2C = 1000;\r
660 if ( gamKF.GetNDF()!=0 ){\r
661 gamKFchi2C = gamKF.GetChi2()/gamKF.GetNDF();\r
662 }\r
663\r
664 //K0 short\r
665 AliKFParticle k0KF(pipKF,pinKF);\r
666 k0KF.SetProductionVertex(vertexKF);\r
667\r
668 Float_t k0KFchi2 = 1000;\r
669 if ( k0KF.GetNDF()!=0 ){\r
670 k0KFchi2 = k0KF.GetChi2()/k0KF.GetNDF();\r
671 }\r
672\r
673 //Lambda\r
674 AliKFParticle lambdaKF(protKF,pinKF);\r
675 lambdaKF.SetProductionVertex(vertexKF);\r
676\r
677 Float_t lambdaKFchi2 = 1000;\r
678 if ( lambdaKF.GetNDF()!=0 ){\r
679 lambdaKFchi2 = lambdaKF.GetChi2()/lambdaKF.GetNDF();\r
680 }\r
681\r
682 //Lambda_bar\r
683 AliKFParticle alambKF(aproKF,pipKF);\r
684 alambKF.SetProductionVertex(vertexKF);\r
685\r
686 Float_t alambKFchi2 = 1000;\r
687 if ( alambKF.GetNDF()!=0 ){\r
688 alambKFchi2 = alambKF.GetChi2()/alambKF.GetNDF();\r
689 }\r
767aaecb 690\r
767aaecb 691\r
692\r
61673d36 693\r
694\r
695 if (pvertex->GetRr()<kMinR){\r
696 // cutN=6;\r
697 // rejectBase+=1<<cutN;\r
698 continue;\r
699 }\r
700 if (pvertex->GetRr()>kMaxR){\r
701 // cutN=7;\r
702 // rejectBase+=1<<cutN;\r
703 continue;\r
704 }\r
705 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle){\r
706 // cutN=8;\r
707 // rejectBase+=1<<cutN;\r
708 continue;\r
709 }\r
cd90f0a2 710//Bo: if (pvertex->GetDist2()>maxDist) continue;\r
61673d36 711\r
712 if (pvertex->GetDcaV0Daughters()>maxDist){\r
713 // cutN=9;\r
714 // rejectBase+=1<<cutN;\r
715 continue;\r
716 }\r
cd90f0a2 717//Bo: pvertex->SetLab(0,track0->GetLabel());\r
718//Bo: pvertex->SetLab(1,track1->GetLabel());\r
719 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
720 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
721 // \r
722 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy; \r
723 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;\r
724\r
725 //\r
726 //\r
727 TObjArray * array0b = (TObjArray*)bestHypothesys->At(itrack0);\r
767aaecb 728 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<kMinTgl1) {\r
cd90f0a2 729 tracker->SetCurrentEsdTrack(itrack0);\r
730 tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack0),itrack0, kFALSE);\r
731 }\r
732 TObjArray * array1b = (TObjArray*)bestHypothesys->At(itrack1);\r
767aaecb 733 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<kMinTgl1) { \r
cd90f0a2 734 tracker->SetCurrentEsdTrack(itrack1);\r
735 tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack1),itrack1, kFALSE);\r
736 }\r
737 //\r
738 AliITStrackMI * track0b = (AliITStrackMI*)originalTracks->At(itrack0);\r
739 AliITStrackMI * track1b = (AliITStrackMI*)originalTracks->At(itrack1);\r
740 AliITStrackMI * track0l = (AliITStrackMI*)originalTracks->At(itrack0);\r
741 AliITStrackMI * track1l = (AliITStrackMI*)originalTracks->At(itrack1);\r
742 \r
767aaecb 743 Float_t minchi2before0=kMinchi2before0;\r
744 Float_t minchi2before1=kMinchi2before1;\r
745 Float_t minchi2after0 =kMinchi2after0;\r
746 Float_t minchi2after1 =kMinchi2after1;\r
cd90f0a2 747 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.\r
748 Int_t maxLayer = tracker->GetNearestLayer(xrp); //I.B.\r
749 \r
750 if (array0b) for (Int_t i=0;i<5;i++){\r
751 // best track after vertex\r
752 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);\r
753 if (!btrack) continue;\r
754 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack; \r
755 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {\r
756 if (btrack->GetX()<pvertex->GetRr()-2.) {\r
757 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){\r
758 Float_t sumchi2= 0;\r
759 Float_t sumn = 0;\r
760 if (maxLayer<3){ // take prim vertex as additional measurement\r
761 if (normdist[itrack0]>0 && htrackc0){\r
762 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);\r
763 }else{\r
764 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);\r
765 }\r
766 sumn += 3-maxLayer;\r
767 }\r
768 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
769 sumn+=1.; \r
770 if (btrack->GetClIndex(ilayer)<0){\r
767aaecb 771 sumchi2+=kAddchi2NegCl0;\r
cd90f0a2 772 continue;\r
773 }else{\r
774 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
775 for (Int_t itrack=0;itrack<4;itrack++){\r
776 AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
777 if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack0){\r
767aaecb 778 sumchi2+=kAddchi2SharedCl; //shared cluster\r
cd90f0a2 779 break;\r
780 }\r
781 }\r
782 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
783 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer)); \r
784 }\r
785 }\r
786 sumchi2/=sumn;\r
787 if (sumchi2<minchi2before0) minchi2before0=sumchi2; \r
788 }\r
789 continue; //safety space - Geo manager will give exact layer\r
790 }\r
791 track0b = btrack;\r
792 minchi2after0 = btrack->GetNormChi2(i);\r
793 break;\r
794 }\r
795 if (array1b) for (Int_t i=0;i<5;i++){\r
796 // best track after vertex\r
797 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);\r
798 if (!btrack) continue;\r
799 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack; \r
800 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){\r
801 if (btrack->GetX()<pvertex->GetRr()-2){\r
802 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){\r
803 Float_t sumchi2= 0;\r
804 Float_t sumn = 0;\r
805 if (maxLayer<3){ // take prim vertex as additional measurement\r
806 if (normdist[itrack1]>0 && htrackc1){\r
807 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);\r
808 }else{\r
809 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);\r
810 }\r
811 sumn += 3-maxLayer;\r
812 }\r
813 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
814 sumn+=1.;\r
815 if (btrack->GetClIndex(ilayer)<0){\r
767aaecb 816 sumchi2+=kAddchi2NegCl1;\r
cd90f0a2 817 continue;\r
818 }else{\r
819 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
820 for (Int_t itrack=0;itrack<4;itrack++){\r
821 AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
822 if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack1){\r
767aaecb 823 sumchi2+=kAddchi2SharedCl; //shared cluster\r
cd90f0a2 824 break;\r
825 }\r
826 }\r
827 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
828 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer)); \r
829 }\r
830 }\r
831 sumchi2/=sumn;\r
832 if (sumchi2<minchi2before1) minchi2before1=sumchi2; \r
833 }\r
834 continue; //safety space - Geo manager will give exact layer \r
835 }\r
836 track1b = btrack;\r
837 minchi2after1 = btrack->GetNormChi2(i);\r
838 break;\r
839 }\r
840 //\r
841 // position resolution - used for DCA cut\r
842 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+\r
843 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+\r
844 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());\r
845 sigmad =TMath::Sqrt(sigmad)+0.04;\r
846 if (pvertex->GetRr()>50){\r
847 Double_t cov0[15],cov1[15];\r
848 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);\r
849 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);\r
850 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+\r
851 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+\r
852 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);\r
853 sigmad =TMath::Sqrt(sigmad)+0.05;\r
854 }\r
855 // \r
856 AliV0 vertex2;\r
857 vertex2.SetParamN(*track0b);\r
858 vertex2.SetParamP(*track1b);\r
859 vertex2.Update(primvertex);\r
860 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
861 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
862 pvertex->SetParamN(*track0b);\r
863 pvertex->SetParamP(*track1b);\r
864 pvertex->Update(primvertex);\r
865 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters\r
866 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
867 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
868 }\r
869 pvertex->SetDistSigma(sigmad);\r
870 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad); \r
871 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);\r
872 //\r
873 // define likelihhod and causalities\r
874 //\r
875 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26; \r
876 if (maxLayer<1){\r
877 Float_t fnorm0 = normdist[itrack0];\r
878 if (fnorm0<0) fnorm0*=-3;\r
879 Float_t fnorm1 = normdist[itrack1];\r
880 if (fnorm1<0) fnorm1*=-3;\r
881 if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){\r
882 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);\r
883 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);\r
884 }\r
885 pvertex->SetChi2Before(normdist[itrack0]);\r
886 pvertex->SetChi2After(normdist[itrack1]); \r
887 pvertex->SetNAfter(0);\r
888 pvertex->SetNBefore(0);\r
889 }else{\r
890 pvertex->SetChi2Before(minchi2before0);\r
891 pvertex->SetChi2After(minchi2before1);\r
892 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){\r
893 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);\r
894 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);\r
895 }\r
896 pvertex->SetNAfter(maxLayer);\r
897 pvertex->SetNBefore(maxLayer); \r
898 }\r
899 if (pvertex->GetRr()<90){\r
900 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
901 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
902 }\r
903 if (pvertex->GetRr()<20){\r
904 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;\r
905 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;\r
906 }\r
907 //\r
908 pvertex->SetCausality(pb0,pb1,pa0,pa1);\r
909 //\r
910 // Likelihood calculations - apply cuts\r
911 // \r
61673d36 912 \r
913 // AM - Comment out for optimization and store the v0OK value\r
914 // Int_t v0OK = 0;\r
915 // Int_t cutOKN=0;\r
cd90f0a2 916 Bool_t v0OK = kTRUE;\r
61673d36 917\r
918\r
cd90f0a2 919 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];\r
920 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];\r
921 p12 = TMath::Sqrt(p12); // "mean" momenta\r
767aaecb 922\r
923 Float_t sigmap0 = kSigp0Par0+kSigp0Par1/(kSigp0Par2+pvertex->GetRr()); \r
924 Float_t sigmap = kSigpPar0*sigmap0*(kSigpPar1+kSigpPar2*p12); // "resolution: of point angle - as a function of radius and momenta\r
925\r
cd90f0a2 926\r
927 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);\r
928 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*\r
929 TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));\r
930 //\r
931 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);\r
932 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();\r
61673d36 933 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<kMaxDcaLh0)*(lDistNorm<5);\r
cd90f0a2 934\r
935 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+\r
936 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+\r
937 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+\r
938 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);\r
939 //\r
61673d36 940 if (causalityA<kCausality0Cut){\r
941 // cutOKN=1;\r
942 // v0OK += 1<<cutOKN;\r
943 v0OK = kFALSE;\r
944 }\r
945 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut){\r
946 // cutOKN=2;\r
947 // v0OK += 1<<cutOKN;\r
948 v0OK = kFALSE;\r
949 }\r
950 if (likelihood1<kLikelihood1Cut){\r
951 // cutOKN=3;\r
952 // v0OK += 1<<cutOKN;\r
953 v0OK = kFALSE;\r
954 }\r
955 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut){\r
956 // cutOKN=4;\r
957 // v0OK += 1<<cutOKN;\r
958 v0OK = kFALSE;\r
959 }\r
cd90f0a2 960 //\r
961 //\r
767aaecb 962 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){ \r
cd90f0a2 963 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;\r
964 cstream<<"It0"<<\r
965 "Tr0.="<<track0<< //best without constrain\r
966 "Tr1.="<<track1<< //best without constrain \r
61673d36 967 "posiKF.="<<&posiKF<< //KF from track0\r
968 "elecKF.="<<&elecKF<< //KF from track1\r
cd90f0a2 969 "Tr0B.="<<track0b<< //best without constrain after vertex\r
970 "Tr1B.="<<track1b<< //best without constrain after vertex \r
971 "Tr0C.="<<htrackc0<< //best with constrain if exist\r
972 "Tr1C.="<<htrackc1<< //best with constrain if exist\r
973 "Tr0L.="<<track0l<< //longest best \r
974 "Tr1L.="<<track1l<< //longest best\r
975 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params\r
976 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params\r
977 "V0.="<<pvertex<< //vertex properties\r
978 "V0b.="<<&vertex2<< //vertex properties at "best" track\r
61673d36 979 "gamKF.="<<&gamKF<< //KF from pvertex\r
980 "k0KF.="<<&k0KF<< //KF from pvertex\r
981 "lambdaKF.="<<&lambdaKF<< //KF from pvertex\r
982 "alambKF.="<<&lambdaKF<< //KF from pvertex\r
983 "gamKFchi2="<<gamKFchi2<< //Normalized chi2 from KF assuming gamma momther\r
984 "gamKFchi2C="<<gamKFchi2C<< //Normalized chi2 from KF assuming gamma mother+mass constraint\r
985 "k0KFchi2="<<k0KFchi2<< //Normalized chi2 from KF assuming K0 mother\r
986 "lambdaKFchi2="<<lambdaKFchi2<< //Normalized chi2 from KF assuming Lambda mother\r
987 "alambKFchi2="<<alambKFchi2<< //Normalized chi2 from KF assuming lambda_bar mother\r
cd90f0a2 988 "ND0="<<normdist[itrack0]<< //normalize distance for track0\r
989 "ND1="<<normdist[itrack1]<< //normalize distance for track1\r
990 "Gold="<<gold<< //\r
61673d36 991 // "RejectBase="<<rejectBase<< //rejection in First itteration\r
cd90f0a2 992 "OK="<<v0OK<<\r
993 "rmin="<<rmin<<\r
994 "sigmad="<<sigmad<<\r
61673d36 995 "Forbid0="<<forbidden[itrack0]<<\r
996 "Forbid1="<<forbidden[itrack1]<<\r
cd90f0a2 997 "\n";\r
998 } \r
61673d36 999 // if (rejectBase>0) continue;\r
1000 //if (forbidden[itrack0]>0 ||forbidden[itrack1]>0) continue; \r
cd90f0a2 1001 //\r
1002 pvertex->SetStatus(0);\r
1003 // if (rejectBase) {\r
1004 // pvertex->SetStatus(-100);\r
1005 //}\r
1006 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {\r
1007 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());\r
1008 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg\r
1009 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos\r
61673d36 1010 // if (v0OK==0){\r
cd90f0a2 1011 if (v0OK){\r
1012 // AliV0vertex vertexjuri(*track0,*track1);\r
1013 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());\r
1014 // event->AddV0(&vertexjuri);\r
1015 pvertex->SetStatus(100);\r
1016 }\r
1017 pvertex->SetOnFlyStatus(kTRUE);\r
1018 pvertex->ChangeMassHypothesis(kK0Short);\r
1019 event->AddV0(pvertex);\r
1020 }\r
1021 }\r
1022 }\r
1023 //\r
1024 //\r
1025 // delete temporary arrays\r
1026 // \r
1027 delete[] forbidden;\r
1028 delete[] minPointAngle;\r
1029 delete[] maxr;\r
1030 delete[] minr;\r
1031 delete[] norm;\r
1032 delete[] normdist;\r
1033 delete[] normdist1;\r
1034 delete[] normdist0;\r
1035 delete[] dist;\r
1036 delete[] itsmap;\r
1037 delete[] helixes;\r
1038 delete pvertex;\r
1039}\r
1040//------------------------------------------------------------------------\r
1041void AliITSV0Finder::RefitV02(const AliESDEvent *event,\r
1042 AliITStrackerMI *tracker) \r
1043{\r
1044 //\r
1045 //try to refit V0s in the third path of the reconstruction\r
1046 //\r
1047 TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
1048 //\r
1049 Int_t nv0s = event->GetNumberOfV0s();\r
1050 Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
1051 AliV0 v0temp;\r
1052 for (Int_t iv0 = 0; iv0<nv0s;iv0++){\r
1053 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);\r
1054 if (!v0mi) continue;\r
1055 Int_t itrack0 = v0mi->GetIndex(0);\r
1056 Int_t itrack1 = v0mi->GetIndex(1);\r
1057 AliESDtrack *esd0 = event->GetTrack(itrack0);\r
1058 AliESDtrack *esd1 = event->GetTrack(itrack1);\r
1059 if (!esd0||!esd1) continue;\r
1060 AliITStrackMI tpc0(*esd0); \r
1061 AliITStrackMI tpc1(*esd1);\r
1062 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B. \r
1063 Double_t alpha =TMath::ATan2(y,x); //I.B.\r
1064 if (v0mi->GetRr()>85){\r
1065 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1066 v0temp.SetParamN(tpc0);\r
1067 v0temp.SetParamP(tpc1);\r
1068 v0temp.Update(primvertex);\r
767aaecb 1069 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
cd90f0a2 1070 "V0.="<<v0mi<<\r
1071 "V0refit.="<<&v0temp<<\r
1072 "Tr0.="<<&tpc0<<\r
1073 "Tr1.="<<&tpc1<<\r
1074 "\n";\r
1075 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1076 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1077 v0mi->SetParamN(tpc0);\r
1078 v0mi->SetParamP(tpc1);\r
1079 v0mi->Update(primvertex);\r
1080 }\r
1081 }\r
1082 continue;\r
1083 }\r
1084 if (v0mi->GetRr()>35){\r
1085 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
1086 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);\r
1087 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1088 v0temp.SetParamN(tpc0);\r
1089 v0temp.SetParamP(tpc1);\r
1090 v0temp.Update(primvertex);\r
767aaecb 1091 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
cd90f0a2 1092 "V0.="<<v0mi<<\r
1093 "V0refit.="<<&v0temp<<\r
1094 "Tr0.="<<&tpc0<<\r
1095 "Tr1.="<<&tpc1<<\r
1096 "\n";\r
1097 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1098 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1099 v0mi->SetParamN(tpc0);\r
1100 v0mi->SetParamP(tpc1);\r
1101 v0mi->Update(primvertex);\r
1102 } \r
1103 }\r
1104 continue;\r
1105 }\r
1106 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
1107 AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1); \r
1108 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1109 if (tracker->RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && \r
1110 tracker->RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){\r
1111 v0temp.SetParamN(tpc0);\r
1112 v0temp.SetParamP(tpc1);\r
1113 v0temp.Update(primvertex);\r
767aaecb 1114 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
cd90f0a2 1115 "V0.="<<v0mi<<\r
1116 "V0refit.="<<&v0temp<<\r
1117 "Tr0.="<<&tpc0<<\r
1118 "Tr1.="<<&tpc1<<\r
1119 "\n";\r
1120 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1121 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1122 v0mi->SetParamN(tpc0);\r
1123 v0mi->SetParamP(tpc1);\r
1124 v0mi->Update(primvertex);\r
1125 } \r
1126 } \r
1127 }\r
1128}\r
1129//------------------------------------------------------------------------\r
767aaecb 1130\r
1131\r
1132AliITSV0Finder::~AliITSV0Finder()\r
1133{\r
1134 //\r
1135 //destructor\r
1136 //\r
1137 if (fDebugStreamer) {\r
1138 //fDebugStreamer->Close();\r
1139 delete fDebugStreamer;\r
1140 }\r
1141\r
1142}\r