- fixing warnings/coverity
[u/mrichter/AliRoot.git] / ITS / AliITSV0Finder.cxx
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
41 #include "AliKFParticle.h"\r
42 #include "AliKFVertex.h"\r
43 \r
44 ClassImp(AliITSV0Finder)\r
45 \r
46 \r
47 AliITSV0Finder::AliITSV0Finder():\r
48 fDebugStreamer(0)\r
49  {\r
50   //Default constructor\r
51 \r
52    if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0)\r
53      fDebugStreamer = new TTreeSRedirector("ITSdebug.root");\r
54\r
55 \r
56 //------------------------------------------------------------------------\r
57 void 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
63   const Float_t kMinTgl2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl2();\r
64 \r
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
140       if (trackp&&TMath::Abs(trackp->GetTgl())<kMinTgl2){\r
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
154       if (trackm&&TMath::Abs(trackm->GetTgl())<kMinTgl2){\r
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
174 void 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
184   const Bool_t kCheckPropagate = kFALSE;\r
185   const Float_t kMaxDist0 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist0();\r
186   const Float_t kMaxDist1 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist1();\r
187   const Float_t kMaxDist = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist();\r
188   const Float_t kMinPointAngle = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle();\r
189   const Float_t kMinPointAngle2 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle2();\r
190   const Float_t kMinR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinR();\r
191   const Float_t kMaxR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxR();\r
192   const Float_t kMinPABestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPABestConst();\r
193   const Float_t kMaxRBestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRBestConst();\r
194   const Float_t kCausality0Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCausality0Cut();\r
195   const Float_t kLikelihood01Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood01Cut();\r
196   const Float_t kLikelihood1Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood1Cut();\r
197   const Float_t kCombinedCut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCombinedCut();\r
198   const Float_t kMinClFullTrk= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClFullTrk();\r
199   const Float_t kMinTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl0();\r
200   const Float_t kMinRTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTgl0();\r
201 \r
202   const Float_t kMinNormDistForbTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbTgl0();\r
203   const Float_t kMinClForb0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClForb0();\r
204   const Float_t kMinNormDistForb1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb1();\r
205   const Float_t kMinNormDistForb2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb2();\r
206   const Float_t kMinNormDistForb3= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb3();\r
207   const Float_t kMinNormDistForb4= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb4();\r
208   const Float_t kMinNormDistForb5= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb5();\r
209   const Float_t kMinNormDistForbProt= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbProt();\r
210   const Float_t kMaxPidProbPionForb= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxPidProbPionForb();\r
211 \r
212   const Float_t kMinRTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTPCdensity();\r
213   const Float_t kMaxRTPCdensity0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity0();\r
214   const Float_t kMaxRTPCdensity10= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity10();\r
215   const Float_t kMaxRTPCdensity20= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity20();\r
216   const Float_t kMaxRTPCdensity30= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity30();\r
217 \r
218 \r
219   const Float_t kMinTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTPCdensity();\r
220   const Float_t kMinTgl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl1();\r
221 \r
222   const Float_t kMinchi2before0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before0();\r
223   const Float_t kMinchi2before1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before1();\r
224   const Float_t kMinchi2after0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after0();\r
225   const Float_t kMinchi2after1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after1();\r
226   const Float_t kAddchi2SharedCl= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2SharedCl();\r
227   const Float_t kAddchi2NegCl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl0();\r
228   const Float_t kAddchi2NegCl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl1();\r
229 \r
230   const Float_t kSigp0Par0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par0();\r
231   const Float_t kSigp0Par1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par1();\r
232   const Float_t kSigp0Par2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par2();\r
233 \r
234   const Float_t kSigpPar0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar0();\r
235   const Float_t kSigpPar1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar1();\r
236   const Float_t kSigpPar2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar2();\r
237   const Float_t kMaxDcaLh0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDcaLh0();\r
238 \r
239 \r
240   TObjArray *trackHypothesys = tracker->GetTrackHypothesys();\r
241   TObjArray *bestHypothesys  = tracker->GetBestHypothesys();\r
242   TObjArray *originalTracks  = tracker->GetOriginal();\r
243   //\r
244   //\r
245   TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
246   Int_t ntracks    = event->GetNumberOfTracks(); \r
247   Int_t nitstracks = trackHypothesys->GetEntriesFast();\r
248   originalTracks->Expand(ntracks);\r
249   trackHypothesys->Expand(ntracks);\r
250   bestHypothesys->Expand(ntracks);\r
251   //\r
252   AliHelix * helixes   = new AliHelix[ntracks+2];\r
253   TObjArray trackarray(ntracks+2);     //array with tracks - with vertex constrain\r
254   TObjArray trackarrayc(ntracks+2);    //array of "best    tracks" - without vertex constrain\r
255   TObjArray trackarrayl(ntracks+2);    //array of "longest tracks" - without vertex constrain\r
256   //Change from Bool_t to Int_t for optimization\r
257   //  Int_t forbN=0;\r
258   //  Int_t * forbidden   = new Int_t [ntracks+2];\r
259   Bool_t * forbidden   = new Bool_t [ntracks+2];\r
260   Int_t   *itsmap      = new Int_t  [ntracks+2];\r
261   Float_t *dist        = new Float_t[ntracks+2];\r
262   Float_t *normdist0   = new Float_t[ntracks+2];\r
263   Float_t *normdist1   = new Float_t[ntracks+2];\r
264   Float_t *normdist    = new Float_t[ntracks+2];\r
265   Float_t *norm        = new Float_t[ntracks+2];\r
266   Float_t *maxr        = new Float_t[ntracks+2];\r
267   Float_t *minr        = new Float_t[ntracks+2];\r
268   Float_t *minPointAngle= new Float_t[ntracks+2];\r
269   //\r
270   AliV0 *pvertex      = new AliV0;\r
271   AliITStrackMI * dummy= new AliITStrackMI;\r
272   dummy->SetLabel(0);\r
273   AliITStrackMI  trackat0;    //temporary track for DCA calculation\r
274   //\r
275   Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
276   //\r
277   // make ITS -  ESD map\r
278   //\r
279   for (Int_t itrack=0;itrack<ntracks+2;itrack++) {\r
280     itsmap[itrack]        = -1;\r
281     //    forbidden[itrack]     = 0;\r
282     forbidden[itrack]     = kFALSE;\r
283     maxr[itrack]          = kMaxR;\r
284     minr[itrack]          = kMinR;\r
285     minPointAngle[itrack] = kMinPointAngle;\r
286   }\r
287   for (Int_t itrack=0;itrack<nitstracks;itrack++){\r
288     AliITStrackMI * original =   (AliITStrackMI*)(originalTracks->At(itrack));\r
289     Int_t           esdindex =   original->GetESDtrack()->GetID();\r
290     itsmap[esdindex]         =   itrack;\r
291   }\r
292   //\r
293   // create ITS tracks from ESD tracks if not done before\r
294   //\r
295   for (Int_t itrack=0;itrack<ntracks;itrack++){\r
296     if (itsmap[itrack]>=0) continue;\r
297     AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));\r
298     //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());\r
299     //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ(); \r
300     tpctrack->GetDZ(tracker->GetX(),tracker->GetY(),tracker->GetZ(),tpctrack->GetDP());   //I.B.\r
301     if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){\r
302       // tracks which can reach inner part of ITS\r
303       // propagate track to outer its volume - with correction for material\r
304       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(tpctrack);  \r
305     }\r
306     itsmap[itrack] = nitstracks;\r
307     originalTracks->AddAt(tpctrack,nitstracks);\r
308     nitstracks++;\r
309   }\r
310   //\r
311   // fill temporary arrays\r
312   //\r
313   for (Int_t itrack=0;itrack<ntracks;itrack++){\r
314     AliESDtrack *  esdtrack = event->GetTrack(itrack);\r
315     Int_t          itsindex = itsmap[itrack];\r
316     AliITStrackMI *original = (AliITStrackMI*)originalTracks->At(itsmap[itrack]);\r
317     if (!original) continue;\r
318     AliITStrackMI *bestConst  = 0;\r
319     AliITStrackMI *bestLong   = 0;\r
320     AliITStrackMI *best       = 0;    \r
321     //\r
322     //\r
323     TObjArray * array    = (TObjArray*)  trackHypothesys->At(itsindex);\r
324     Int_t       hentries = (array==0) ?  0 : array->GetEntriesFast();\r
325     // Get best track with vertex constrain\r
326     for (Int_t ih=0;ih<hentries;ih++){\r
327       AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
328       if (!trackh->GetConstrain()) continue;\r
329       if (!bestConst) bestConst = trackh;\r
330       if (trackh->GetNumberOfClusters()>kMinClFullTrk ){\r
331         bestConst  = trackh;                         // full track -  with minimal chi2\r
332         break;\r
333       }\r
334       if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone())  continue;      \r
335       bestConst = trackh;\r
336       break;\r
337     }\r
338     // Get best long track without vertex constrain and best track without vertex constrain\r
339     for (Int_t ih=0;ih<hentries;ih++){\r
340       AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
341       if (trackh->GetConstrain()) continue;\r
342       if (!best)     best     = trackh;\r
343       if (!bestLong) bestLong = trackh;\r
344       if (trackh->GetNumberOfClusters()>kMinClFullTrk){\r
345         bestLong  = trackh;                         // full track -  with minimal chi2\r
346         break;\r
347       }\r
348       if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone())  continue;      \r
349       bestLong = trackh;        \r
350     }\r
351     if (!best) {\r
352       best     = original;\r
353       bestLong = original;\r
354     }\r
355     //I.B. trackat0 = *bestLong;\r
356     new (&trackat0) AliITStrackMI(*bestLong);\r
357     Double_t xx,yy,zz,alpha; \r
358     if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;\r
359     \r
360 \r
361     alpha = TMath::ATan2(yy,xx);    \r
362     //    if (!trackat0.Propagate(alpha,0)) continue;    \r
363     //    trackat0.Propagate(alpha,0); //PH The check on the return value is temporarily disabled (bug 45751) \r
364     if(!trackat0.Propagate(alpha,0) && kCheckPropagate)continue;\r
365     // calculate normalized distances to the vertex \r
366     //\r
367     Float_t ptfac  = (1.+100.*TMath::Abs(trackat0.GetC()));\r
368     if ( bestLong->GetNumberOfClusters()>3 ){      \r
369       dist[itsindex]      = trackat0.GetY();\r
370       norm[itsindex]      = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
371       normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
372       normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
373       normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
374       if (!bestConst){\r
375         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;\r
376         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;\r
377         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;\r
378       }else{\r
379         if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;\r
380         if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;\r
381       }\r
382     }\r
383     else{      \r
384       if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){\r
385         dist[itsindex] = bestConst->GetD(0);\r
386         norm[itsindex] = bestConst->GetDnorm(0);\r
387         normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
388         normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
389         normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
390       }else{\r
391         dist[itsindex]      = trackat0.GetY();\r
392         norm[itsindex]      = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
393         normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
394         normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
395         normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
396         if (TMath::Abs(trackat0.GetTgl())>kMinTgl0){\r
397           if (normdist[itsindex]<kMinNormDistForbTgl0){\r
398             //      forbN=1;\r
399             //      forbidden[itsindex]+=1<<forbN;\r
400             forbidden[itsindex]=kTRUE;\r
401           }\r
402           if (normdist[itsindex]>kMinNormDistForbTgl0) {\r
403             minr[itsindex] = TMath::Max(kMinRTgl0,minr[itsindex]);\r
404           }\r
405         }\r
406       }\r
407     }\r
408 \r
409 \r
410     //\r
411     //-----------------------------------------------------------\r
412     //Forbid primary track candidates - \r
413     //\r
414     //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");\r
415     //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");\r
416     //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");\r
417     //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");\r
418     //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");\r
419     //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");\r
420     //-----------------------------------------------------------\r
421     if (bestConst){\r
422       if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>kMinClForb0){\r
423         //      forbN=2;\r
424         //      forbidden[itsindex]+=1<<forbN;\r
425         forbidden[itsindex]=kTRUE;\r
426       }\r
427       if (normdist[itsindex]<kMinNormDistForb1 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5){\r
428         //      forbN=3;\r
429         //      forbidden[itsindex]+=1<<forbN;\r
430         forbidden[itsindex]=kTRUE;\r
431       }\r
432       if (normdist[itsindex]<kMinNormDistForb2 && bestConst->GetClIndex(0)>=0 && bestConst->GetClIndex(1)>=0 ){\r
433         //      forbN=4;\r
434         //      forbidden[itsindex]+=1<<forbN;\r
435         forbidden[itsindex]=kTRUE;\r
436       }\r
437       if (normdist[itsindex]<kMinNormDistForb3 && bestConst->GetClIndex(0)>=0){\r
438         //      forbN=5;\r
439         //      forbidden[itsindex]+=1<<forbN;\r
440         forbidden[itsindex]=kTRUE;\r
441       }\r
442       if (normdist[itsindex]<kMinNormDistForb4 && bestConst->GetNormChi2(0)<2){\r
443         //      forbN=6;\r
444         //      forbidden[itsindex]+=1<<forbN;\r
445         forbidden[itsindex]=kTRUE;\r
446       }\r
447       if (normdist[itsindex]<kMinNormDistForb5 && bestConst->GetNormChi2(0)<1){\r
448         //      forbN=7;\r
449         //      forbidden[itsindex]+=1<<forbN;\r
450         forbidden[itsindex]=kTRUE;\r
451       }\r
452       if (bestConst->GetNormChi2(0)<2.5) {\r
453         minPointAngle[itsindex]= kMinPABestConst;\r
454         maxr[itsindex]         = kMaxRBestConst;\r
455       }\r
456     }\r
457     //\r
458     //forbid daughter kink candidates\r
459     //\r
460     if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;\r
461     Bool_t isElectron = kTRUE;\r
462     Bool_t isProton   = kTRUE;\r
463     Double_t pid[5];\r
464     esdtrack->GetESDpid(pid);\r
465     for (Int_t i=1;i<5;i++){\r
466       if (pid[0]<pid[i]) isElectron= kFALSE;\r
467       if (pid[4]<pid[i]) isProton= kFALSE;\r
468     }\r
469     if (isElectron){\r
470       forbidden[itsindex]=kFALSE;       \r
471       normdist[itsindex]*=-1;\r
472     }\r
473     if (isProton){\r
474       if (normdist[itsindex]>kMinNormDistForbProt) forbidden[itsindex]=kFALSE;  \r
475       normdist[itsindex]*=-1;\r
476     }\r
477 \r
478     // We allow all tracks that are not pions\r
479     if( (pid[1]+pid[2])< kMaxPidProbPionForb ){\r
480       forbidden[itsindex]=kFALSE;\r
481     }\r
482 \r
483     //\r
484     // Causality cuts in TPC volume\r
485     //\r
486     if (esdtrack->GetTPCdensity(0,10) >kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity0),maxr[itsindex]);\r
487     if (esdtrack->GetTPCdensity(10,30)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity10),maxr[itsindex]);\r
488     if (esdtrack->GetTPCdensity(20,40)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity20),maxr[itsindex]);\r
489     if (esdtrack->GetTPCdensity(30,50)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity30),maxr[itsindex]);\r
490     //\r
491     if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=kMinRTPCdensity;    \r
492     //\r
493     //\r
494 \r
495     if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){\r
496       cstream<<"Track"<<\r
497         "Tr0.="<<best<<\r
498         "Tr1.="<<((bestConst)? bestConst:dummy)<<\r
499         "Tr2.="<<bestLong<<\r
500         "Tr3.="<<&trackat0<<\r
501         "Esd.="<<esdtrack<<\r
502         "Dist="<<dist[itsindex]<<\r
503         "ND0="<<normdist0[itsindex]<<\r
504         "ND1="<<normdist1[itsindex]<<\r
505         "ND="<<normdist[itsindex]<<\r
506         "Pz="<<primvertex[2]<<\r
507         "Forbid="<<forbidden[itsindex]<<\r
508         "\n";\r
509       //\r
510     }\r
511     trackarray.AddAt(best,itsindex);\r
512     trackarrayc.AddAt(bestConst,itsindex);\r
513     trackarrayl.AddAt(bestLong,itsindex);\r
514     new (&helixes[itsindex]) AliHelix(*best);\r
515   }\r
516   //\r
517   //\r
518   //\r
519   // first iterration of V0 finder\r
520   //\r
521   // AM Comment out for optimization\r
522   //  Int_t rejectBase=0;\r
523   //  Int_t cutN=0;\r
524 \r
525   for (Int_t iesd0=0;iesd0<ntracks;iesd0++){\r
526     Int_t itrack0 = itsmap[iesd0];\r
527     //-AM comment for optimization and store the forbidden value in the debug streamer\r
528     if (forbidden[itrack0]) continue;\r
529     AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);\r
530     if (!btrack0) continue;    \r
531     AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);\r
532     //\r
533     for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){\r
534       Int_t itrack1 = itsmap[iesd1];\r
535       //-AM comment for optimization and store the forbidden value in the debug streamer\r
536       if (forbidden[itrack1]) continue;\r
537 \r
538       AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1); \r
539       if (!btrack1) continue;\r
540 \r
541       if ( (btrack0->GetSign()==btrack1->GetSign()) && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;\r
542 \r
543       Bool_t isGold = kFALSE;\r
544       if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){\r
545         isGold = kTRUE;\r
546       }\r
547       //      rejectBase=0;\r
548       AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);\r
549       AliHelix &h1 = helixes[itrack0];\r
550       AliHelix &h2 = helixes[itrack1];\r
551       //\r
552       // find linear distance\r
553       Double_t rmin =0;\r
554       //\r
555       //\r
556       //\r
557       Double_t phase[2][2],radius[2];\r
558       Int_t  points = h1.GetRPHIintersections(h2, phase, radius);\r
559       if    (points==0) {\r
560         //      cutN=1;\r
561         //      rejectBase+=1<<cutN;\r
562         continue;\r
563       }\r
564       Double_t delta[2]={1000000,1000000};        \r
565       rmin = radius[0];\r
566       h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);\r
567       if (points==2){    \r
568         if (radius[1]<rmin) rmin = radius[1];\r
569         h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);\r
570       }\r
571       rmin = TMath::Sqrt(rmin);\r
572       Double_t distance = 0;\r
573       Double_t radiusC  = 0;\r
574       Int_t    iphase   = 0;\r
575       if (points==1 || delta[0]<delta[1]){\r
576         distance = TMath::Sqrt(delta[0]);\r
577         radiusC  = TMath::Sqrt(radius[0]);\r
578       }else{\r
579         distance = TMath::Sqrt(delta[1]);\r
580         radiusC  = TMath::Sqrt(radius[1]);\r
581         iphase=1;\r
582       }\r
583       if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])){\r
584         //      cutN=2;\r
585         //rejectBase+=1<<cutN;\r
586         continue;\r
587       }\r
588       if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])){\r
589         //      cutN=3;\r
590         //      rejectBase+=1<<cutN;\r
591         continue;\r
592       } \r
593       Float_t maxDist  = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));      \r
594       if (distance>maxDist){\r
595         //      cutN=4;\r
596         //      rejectBase+=1<<cutN;\r
597         continue;\r
598       }\r
599       Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);\r
600       if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) {\r
601         //      cutN=5;\r
602         //      rejectBase+=1<<cutN;\r
603         continue;\r
604       }\r
605       //\r
606       //\r
607       //      Double_t distance = TestV0(h1,h2,pvertex,rmin);\r
608       //\r
609       //       if (distance>maxDist)           continue;\r
610       //       if (pvertex->GetRr()<kMinR)     continue;\r
611       //       if (pvertex->GetRr()>kMaxR)     continue;\r
612       AliITStrackMI * track0=btrack0;\r
613       AliITStrackMI * track1=btrack1;\r
614       //      if (pvertex->GetRr()<3.5){  \r
615       if (radiusC<3.5){  \r
616         //use longest tracks inside the pipe\r
617         track0 = (AliITStrackMI*)trackarrayl.At(itrack0);\r
618         track1 = (AliITStrackMI*)trackarrayl.At(itrack1);\r
619       }      \r
620       //\r
621       //\r
622       \r
623 \r
624  \r
625       pvertex->SetParamN(*track0);\r
626       pvertex->SetParamP(*track1);\r
627       pvertex->Update(primvertex);\r
628       pvertex->SetClusters(track0->ClIndex(),track1->ClIndex());  // register clusters\r
629 \r
630       // Define gamma, K0, lambda and lambda_bar from the decay particles and calculate the chi2      \r
631       AliKFVertex vertexKF;\r
632 \r
633       vertexKF.X() = tracker->GetX();\r
634       vertexKF.Y() = tracker->GetY();\r
635       vertexKF.Z() = tracker->GetZ();\r
636       vertexKF.Covariance(0,0) = tracker->GetSigmaX()*tracker->GetSigmaX();\r
637       vertexKF.Covariance(1,2) = tracker->GetSigmaY()*tracker->GetSigmaY();\r
638       vertexKF.Covariance(2,2) = tracker->GetSigmaZ()*tracker->GetSigmaZ();\r
639       \r
640       AliKFParticle elecKF( *(pvertex->GetParamN()) ,11);\r
641       AliKFParticle posiKF( *(pvertex->GetParamP()) ,-11);\r
642       AliKFParticle pipKF( *(pvertex->GetParamN()) , 211);\r
643       AliKFParticle pinKF( *(pvertex->GetParamP()) ,-211);\r
644       AliKFParticle protKF( *(pvertex->GetParamP()) ,2212);\r
645       AliKFParticle aproKF ( *(pvertex->GetParamN()) ,-2212);\r
646 \r
647 \r
648       // Gamma\r
649       AliKFParticle gamKF(elecKF,posiKF);\r
650       gamKF.SetProductionVertex(vertexKF);\r
651 \r
652       Float_t gamKFchi2 = 1000;\r
653       if ( gamKF.GetNDF()!=0 ){\r
654         gamKFchi2 = gamKF.GetChi2()/gamKF.GetNDF();\r
655       }\r
656 \r
657       Float_t massG=0.;\r
658       Float_t sigmaMG=0.001;\r
659       gamKF.SetMassConstraint(massG,sigmaMG);\r
660 \r
661       Float_t gamKFchi2C = 1000;\r
662       if ( gamKF.GetNDF()!=0 ){\r
663         gamKFchi2C = gamKF.GetChi2()/gamKF.GetNDF();\r
664       }\r
665 \r
666       //K0 short\r
667       AliKFParticle k0KF(pipKF,pinKF);\r
668       k0KF.SetProductionVertex(vertexKF);\r
669 \r
670       Float_t k0KFchi2 = 1000;\r
671       if ( k0KF.GetNDF()!=0 ){\r
672         k0KFchi2 = k0KF.GetChi2()/k0KF.GetNDF();\r
673       }\r
674 \r
675       //Lambda\r
676       AliKFParticle lambdaKF(protKF,pinKF);\r
677       lambdaKF.SetProductionVertex(vertexKF);\r
678 \r
679       Float_t lambdaKFchi2 = 1000;\r
680       if ( lambdaKF.GetNDF()!=0 ){\r
681         lambdaKFchi2 = lambdaKF.GetChi2()/lambdaKF.GetNDF();\r
682       }\r
683 \r
684       //Lambda_bar\r
685       AliKFParticle alambKF(aproKF,pipKF);\r
686       alambKF.SetProductionVertex(vertexKF);\r
687 \r
688       Float_t alambKFchi2 = 1000;\r
689       if ( alambKF.GetNDF()!=0 ){\r
690         alambKFchi2 = alambKF.GetChi2()/alambKF.GetNDF();\r
691       }\r
692 \r
693 \r
694 \r
695 \r
696 \r
697       if (pvertex->GetRr()<kMinR){\r
698         //      cutN=6;\r
699         //      rejectBase+=1<<cutN;\r
700         continue;\r
701       }\r
702       if (pvertex->GetRr()>kMaxR){\r
703         //      cutN=7;\r
704         //      rejectBase+=1<<cutN;\r
705         continue;\r
706       }\r
707       if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle){\r
708         //      cutN=8;\r
709         //      rejectBase+=1<<cutN;\r
710         continue;\r
711       }\r
712 //Bo:      if (pvertex->GetDist2()>maxDist) continue;\r
713 \r
714       if (pvertex->GetDcaV0Daughters()>maxDist){\r
715         //      cutN=9;\r
716         //      rejectBase+=1<<cutN;\r
717         continue;\r
718       }\r
719 //Bo:        pvertex->SetLab(0,track0->GetLabel());\r
720 //Bo:        pvertex->SetLab(1,track1->GetLabel());\r
721       pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
722       pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
723       //      \r
724       AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;      \r
725       AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;\r
726 \r
727       //\r
728       //\r
729       TObjArray * array0b     = (TObjArray*)bestHypothesys->At(itrack0);\r
730       if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<kMinTgl1) {\r
731         tracker->SetCurrentEsdTrack(itrack0);\r
732         tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack0),itrack0, kFALSE);\r
733       }\r
734       TObjArray * array1b    = (TObjArray*)bestHypothesys->At(itrack1);\r
735       if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<kMinTgl1) { \r
736         tracker->SetCurrentEsdTrack(itrack1);\r
737         tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack1),itrack1, kFALSE);\r
738       }\r
739       //\r
740       AliITStrackMI * track0b = (AliITStrackMI*)originalTracks->At(itrack0);\r
741       AliITStrackMI * track1b = (AliITStrackMI*)originalTracks->At(itrack1);\r
742       AliITStrackMI * track0l = (AliITStrackMI*)originalTracks->At(itrack0);\r
743       AliITStrackMI * track1l = (AliITStrackMI*)originalTracks->At(itrack1);\r
744       \r
745       Float_t minchi2before0=kMinchi2before0;\r
746       Float_t minchi2before1=kMinchi2before1;\r
747       Float_t minchi2after0 =kMinchi2after0;\r
748       Float_t minchi2after1 =kMinchi2after1;\r
749       Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]);  //I.B.\r
750       Int_t maxLayer = tracker->GetNearestLayer(xrp);                   //I.B.\r
751       \r
752       if (array0b) for (Int_t i=0;i<5;i++){\r
753         // best track after vertex\r
754         AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);\r
755         if (!btrack) continue;\r
756         if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;     \r
757         //      if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {\r
758         if (btrack->GetX()<pvertex->GetRr()-2.) {\r
759           if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){\r
760             Float_t sumchi2= 0;\r
761             Float_t sumn   = 0;\r
762             if (maxLayer<3){   // take prim vertex as additional measurement\r
763               if (normdist[itrack0]>0 && htrackc0){\r
764                 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);\r
765               }else{\r
766                 sumchi2 +=  TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);\r
767               }\r
768               sumn    +=  3-maxLayer;\r
769             }\r
770             for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
771               sumn+=1.;       \r
772               if (btrack->GetClIndex(ilayer)<0){\r
773                 sumchi2+=kAddchi2NegCl0;\r
774                 continue;\r
775               }else{\r
776                 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
777                 for (Int_t itrack=0;itrack<4;itrack++){\r
778                   AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
779                   if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack0){\r
780                     sumchi2+=kAddchi2SharedCl;  //shared cluster\r
781                     break;\r
782                   }\r
783                 }\r
784                 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
785                 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));            \r
786               }\r
787             }\r
788             sumchi2/=sumn;\r
789             if (sumchi2<minchi2before0) minchi2before0=sumchi2; \r
790           }\r
791           continue;   //safety space - Geo manager will give exact layer\r
792         }\r
793         track0b       = btrack;\r
794         minchi2after0 = btrack->GetNormChi2(i);\r
795         break;\r
796       }\r
797       if (array1b) for (Int_t i=0;i<5;i++){\r
798         // best track after vertex\r
799         AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);\r
800         if (!btrack) continue;\r
801         if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;     \r
802         //      if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){\r
803         if (btrack->GetX()<pvertex->GetRr()-2){\r
804           if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){\r
805             Float_t sumchi2= 0;\r
806             Float_t sumn   = 0;\r
807             if (maxLayer<3){   // take prim vertex as additional measurement\r
808               if (normdist[itrack1]>0 && htrackc1){\r
809                 sumchi2 +=  TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);\r
810               }else{\r
811                 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);\r
812               }\r
813               sumn    +=  3-maxLayer;\r
814             }\r
815             for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
816               sumn+=1.;\r
817               if (btrack->GetClIndex(ilayer)<0){\r
818                 sumchi2+=kAddchi2NegCl1;\r
819                 continue;\r
820               }else{\r
821                 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
822                 for (Int_t itrack=0;itrack<4;itrack++){\r
823                   AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
824                   if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack1){\r
825                     sumchi2+=kAddchi2SharedCl;  //shared cluster\r
826                     break;\r
827                   }\r
828                 }\r
829                 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
830                 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));            \r
831               }\r
832             }\r
833             sumchi2/=sumn;\r
834             if (sumchi2<minchi2before1) minchi2before1=sumchi2; \r
835           }\r
836           continue;   //safety space - Geo manager will give exact layer           \r
837         }\r
838         track1b = btrack;\r
839         minchi2after1 = btrack->GetNormChi2(i);\r
840         break;\r
841       }\r
842       //\r
843       // position resolution - used for DCA cut\r
844       Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+\r
845         (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+\r
846         (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());\r
847       sigmad =TMath::Sqrt(sigmad)+0.04;\r
848       if (pvertex->GetRr()>50){\r
849         Double_t cov0[15],cov1[15];\r
850         track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);\r
851         track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);\r
852         sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+\r
853           (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+\r
854           (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);\r
855         sigmad =TMath::Sqrt(sigmad)+0.05;\r
856       }\r
857       //       \r
858       AliV0 vertex2;\r
859       vertex2.SetParamN(*track0b);\r
860       vertex2.SetParamP(*track1b);\r
861       vertex2.Update(primvertex);\r
862       //Bo:      if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
863       if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
864         pvertex->SetParamN(*track0b);\r
865         pvertex->SetParamP(*track1b);\r
866         pvertex->Update(primvertex);\r
867         pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex());  // register clusters\r
868         pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
869         pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
870       }\r
871       pvertex->SetDistSigma(sigmad);\r
872       //Bo:      pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);       \r
873       pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);\r
874       //\r
875       // define likelihhod and causalities\r
876       //\r
877       Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;      \r
878       if (maxLayer<1){\r
879         Float_t fnorm0 = normdist[itrack0];\r
880         if (fnorm0<0) fnorm0*=-3;\r
881         Float_t fnorm1 = normdist[itrack1];\r
882         if (fnorm1<0) fnorm1*=-3;\r
883         if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){\r
884           pb0    =  TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);\r
885           pb1    =  TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);\r
886         }\r
887         pvertex->SetChi2Before(normdist[itrack0]);\r
888         pvertex->SetChi2After(normdist[itrack1]);       \r
889         pvertex->SetNAfter(0);\r
890         pvertex->SetNBefore(0);\r
891       }else{\r
892         pvertex->SetChi2Before(minchi2before0);\r
893         pvertex->SetChi2After(minchi2before1);\r
894          if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){\r
895            pb0    =  TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);\r
896            pb1    =  TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);\r
897          }\r
898          pvertex->SetNAfter(maxLayer);\r
899          pvertex->SetNBefore(maxLayer);      \r
900       }\r
901       if (pvertex->GetRr()<90){\r
902         pa0  *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
903         pa1  *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
904       }\r
905       if (pvertex->GetRr()<20){\r
906         pa0  *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;\r
907         pa1  *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;\r
908       }\r
909       //\r
910       pvertex->SetCausality(pb0,pb1,pa0,pa1);\r
911       //\r
912       //  Likelihood calculations  - apply cuts\r
913       //         \r
914  \r
915       // AM - Comment out for optimization and store the v0OK value\r
916       //      Int_t v0OK = 0;\r
917       //      Int_t cutOKN=0;\r
918       Bool_t v0OK = kTRUE;\r
919 \r
920 \r
921       Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];\r
922       p12        += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];\r
923       p12         = TMath::Sqrt(p12);                             // "mean" momenta\r
924 \r
925       Float_t    sigmap0   = kSigp0Par0+kSigp0Par1/(kSigp0Par2+pvertex->GetRr()); \r
926       Float_t    sigmap    = kSigpPar0*sigmap0*(kSigpPar1+kSigpPar2*p12);           // "resolution: of point angle - as a function of radius and momenta\r
927 \r
928 \r
929       Float_t causalityA  = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);\r
930       Float_t causalityB  = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*\r
931                                         TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));\r
932       //\r
933       //Bo:      Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);\r
934       Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();\r
935       Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<kMaxDcaLh0)*(lDistNorm<5);\r
936 \r
937       Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+\r
938         0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+\r
939         0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+\r
940         0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);\r
941       //\r
942       if (causalityA<kCausality0Cut){\r
943         //      cutOKN=1;\r
944         //      v0OK += 1<<cutOKN;\r
945         v0OK = kFALSE;\r
946       }\r
947       if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut){\r
948         //      cutOKN=2;\r
949         //      v0OK += 1<<cutOKN;\r
950         v0OK = kFALSE;\r
951       }\r
952       if (likelihood1<kLikelihood1Cut){\r
953         //      cutOKN=3;\r
954         //      v0OK += 1<<cutOKN;\r
955         v0OK = kFALSE;\r
956       }\r
957       if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut){\r
958         //      cutOKN=4;\r
959         //      v0OK += 1<<cutOKN;\r
960         v0OK = kFALSE;\r
961       }\r
962       //\r
963       //\r
964       if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){      \r
965         Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;\r
966         cstream<<"It0"<<\r
967           "Tr0.="<<track0<<                       //best without constrain\r
968           "Tr1.="<<track1<<                       //best without constrain  \r
969           "posiKF.="<<&posiKF<<                       //KF from track0\r
970           "elecKF.="<<&elecKF<<                       //KF from track1\r
971           "Tr0B.="<<track0b<<                     //best without constrain  after vertex\r
972           "Tr1B.="<<track1b<<                     //best without constrain  after vertex \r
973           "Tr0C.="<<htrackc0<<                    //best with constrain     if exist\r
974           "Tr1C.="<<htrackc1<<                    //best with constrain     if exist\r
975           "Tr0L.="<<track0l<<                     //longest best           \r
976           "Tr1L.="<<track1l<<                     //longest best\r
977           "Esd0.="<<track0->GetESDtrack()<<           // esd track0 params\r
978           "Esd1.="<<track1->GetESDtrack()<<           // esd track1 params\r
979           "V0.="<<pvertex<<                       //vertex properties\r
980           "V0b.="<<&vertex2<<                       //vertex properties at "best" track\r
981           "gamKF.="<<&gamKF<<                          //KF from pvertex\r
982           "k0KF.="<<&k0KF<<                          //KF from pvertex\r
983           "lambdaKF.="<<&lambdaKF<<                          //KF from pvertex\r
984           "alambKF.="<<&lambdaKF<<                          //KF from pvertex\r
985           "gamKFchi2="<<gamKFchi2<<    //Normalized chi2 from KF assuming gamma momther\r
986           "gamKFchi2C="<<gamKFchi2C<<    //Normalized chi2 from KF assuming gamma mother+mass constraint\r
987           "k0KFchi2="<<k0KFchi2<<    //Normalized chi2 from KF assuming K0 mother\r
988           "lambdaKFchi2="<<lambdaKFchi2<<    //Normalized chi2 from KF assuming Lambda mother\r
989           "alambKFchi2="<<alambKFchi2<<    //Normalized chi2 from KF assuming lambda_bar mother\r
990           "ND0="<<normdist[itrack0]<<             //normalize distance for track0\r
991           "ND1="<<normdist[itrack1]<<             //normalize distance for track1\r
992           "Gold="<<gold<<                         //\r
993           // "RejectBase="<<rejectBase<<             //rejection in First itteration\r
994           "OK="<<v0OK<<\r
995           "rmin="<<rmin<<\r
996           "sigmad="<<sigmad<<\r
997           "Forbid0="<<forbidden[itrack0]<<\r
998           "Forbid1="<<forbidden[itrack1]<<\r
999           "\n";\r
1000       }      \r
1001       //      if (rejectBase>0) continue;\r
1002       //if (forbidden[itrack0]>0 ||forbidden[itrack1]>0) continue; \r
1003       //\r
1004       pvertex->SetStatus(0);\r
1005       //      if (rejectBase) {\r
1006       //        pvertex->SetStatus(-100);\r
1007       //}\r
1008       if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {\r
1009         //Bo:     pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());\r
1010         pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg\r
1011         pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos\r
1012         //      if (v0OK==0){\r
1013         if (v0OK){\r
1014           //      AliV0vertex vertexjuri(*track0,*track1);\r
1015           //      vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());\r
1016           //      event->AddV0(&vertexjuri);\r
1017           pvertex->SetStatus(100);\r
1018         }\r
1019         pvertex->SetOnFlyStatus(kTRUE);\r
1020         pvertex->ChangeMassHypothesis(kK0Short);\r
1021         event->AddV0(pvertex);\r
1022       }\r
1023     }\r
1024   }\r
1025   //\r
1026   //\r
1027   // delete temporary arrays\r
1028   //  \r
1029   delete[] forbidden;\r
1030   delete[] minPointAngle;\r
1031   delete[] maxr;\r
1032   delete[] minr;\r
1033   delete[] norm;\r
1034   delete[] normdist;\r
1035   delete[] normdist1;\r
1036   delete[] normdist0;\r
1037   delete[] dist;\r
1038   delete[] itsmap;\r
1039   delete[] helixes;\r
1040   delete   pvertex;\r
1041 }\r
1042 //------------------------------------------------------------------------\r
1043 void AliITSV0Finder::RefitV02(const AliESDEvent *event,\r
1044                                 AliITStrackerMI *tracker) \r
1045 {\r
1046   //\r
1047   //try to refit  V0s in the third path of the reconstruction\r
1048   //\r
1049   TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
1050   //\r
1051   Int_t  nv0s = event->GetNumberOfV0s();\r
1052   Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
1053   AliV0 v0temp;\r
1054   for (Int_t iv0 = 0; iv0<nv0s;iv0++){\r
1055     AliV0 * v0mi = (AliV0*)event->GetV0(iv0);\r
1056     if (!v0mi) continue;\r
1057     Int_t     itrack0   = v0mi->GetIndex(0);\r
1058     Int_t     itrack1   = v0mi->GetIndex(1);\r
1059     AliESDtrack *esd0   = event->GetTrack(itrack0);\r
1060     AliESDtrack *esd1   = event->GetTrack(itrack1);\r
1061     if (!esd0||!esd1) continue;\r
1062     AliITStrackMI tpc0(*esd0);  \r
1063     AliITStrackMI tpc1(*esd1);\r
1064     Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B. \r
1065     Double_t alpha =TMath::ATan2(y,x);   //I.B.\r
1066     if (v0mi->GetRr()>85){\r
1067       if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1068         v0temp.SetParamN(tpc0);\r
1069         v0temp.SetParamP(tpc1);\r
1070         v0temp.Update(primvertex);\r
1071         if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
1072           "V0.="<<v0mi<<\r
1073           "V0refit.="<<&v0temp<<\r
1074           "Tr0.="<<&tpc0<<\r
1075           "Tr1.="<<&tpc1<<\r
1076           "\n";\r
1077         //Bo:   if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1078         if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1079           v0mi->SetParamN(tpc0);\r
1080           v0mi->SetParamP(tpc1);\r
1081           v0mi->Update(primvertex);\r
1082         }\r
1083       }\r
1084       continue;\r
1085     }\r
1086     if (v0mi->GetRr()>35){\r
1087       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
1088       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);\r
1089       if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1090         v0temp.SetParamN(tpc0);\r
1091         v0temp.SetParamP(tpc1);\r
1092         v0temp.Update(primvertex);\r
1093         if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
1094           "V0.="<<v0mi<<\r
1095           "V0refit.="<<&v0temp<<\r
1096           "Tr0.="<<&tpc0<<\r
1097           "Tr1.="<<&tpc1<<\r
1098           "\n";\r
1099         //Bo:   if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1100         if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1101           v0mi->SetParamN(tpc0);\r
1102           v0mi->SetParamP(tpc1);\r
1103           v0mi->Update(primvertex);\r
1104         }       \r
1105       }\r
1106       continue;\r
1107     }\r
1108     AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
1109     AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);    \r
1110     //    if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1111     if (tracker->RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && \r
1112         tracker->RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){\r
1113       v0temp.SetParamN(tpc0);\r
1114       v0temp.SetParamP(tpc1);\r
1115       v0temp.Update(primvertex);\r
1116       if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
1117         "V0.="<<v0mi<<\r
1118         "V0refit.="<<&v0temp<<\r
1119         "Tr0.="<<&tpc0<<\r
1120         "Tr1.="<<&tpc1<<\r
1121         "\n";\r
1122       //Bo:      if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1123       if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1124         v0mi->SetParamN(tpc0);\r
1125         v0mi->SetParamP(tpc1);\r
1126         v0mi->Update(primvertex);\r
1127       } \r
1128     }    \r
1129   }\r
1130 }\r
1131 //------------------------------------------------------------------------\r
1132 \r
1133 \r
1134 AliITSV0Finder::~AliITSV0Finder()\r
1135 {\r
1136   //\r
1137   //destructor\r
1138   //\r
1139   if (fDebugStreamer) {\r
1140     //fDebugStreamer->Close();\r
1141     delete fDebugStreamer;\r
1142   }\r
1143 \r
1144 }\r