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 "AliESDV0Params.h"\r
  36 #include "AliV0.h"\r
  37 #include "AliHelix.h"\r
  38 #include "AliITSRecPoint.h"\r
  39 #include "AliITSReconstructor.h"\r
  40 #include "AliITStrackerMI.h"\r
  41 #include "AliITSV0Finder.h"\r
  42 #include "AliKFParticle.h"\r
  43 #include "AliKFVertex.h"\r
  44 \r
  45 ClassImp(AliITSV0Finder)\r
  46 \r
  47 \r
  48 AliITSV0Finder::AliITSV0Finder():\r
  49 fDebugStreamer(0)\r
  50  {\r
  51   //Default constructor\r
  52 \r
  53    if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0)\r
  54      fDebugStreamer = new TTreeSRedirector("ITSdebug.root");\r
  55 } \r
  56 \r
  57 //------------------------------------------------------------------------\r
  58 void AliITSV0Finder::UpdateTPCV0(const AliESDEvent *event,\r
  59                                    AliITStrackerMI *tracker)\r
  60 {\r
  61   //\r
  62   //try to update, or reject TPC  V0s\r
  63   //\r
  64   const Float_t kMinTgl2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl2();\r
  65 \r
  66   TObjArray *trackHypothesys = tracker->GetTrackHypothesys();\r
  67 \r
  68   Int_t nv0s = event->GetNumberOfV0s();\r
  69   Int_t nitstracks = trackHypothesys->GetEntriesFast();\r
  70 \r
  71   for (Int_t i=0;i<nv0s;i++){\r
  72     AliESDv0 * vertex = event->GetV0(i);\r
  73     Int_t ip = vertex->GetIndex(0);\r
  74     Int_t im = vertex->GetIndex(1);\r
  75     //\r
  76     TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)trackHypothesys->At(ip):0;\r
  77     TObjArray * arraym = (im<nitstracks) ? (TObjArray*)trackHypothesys->At(im):0;\r
  78     AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;\r
  79     AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;\r
  80     //\r
  81     //\r
  82     if (trackp){\r
  83       if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){\r
  84         if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);\r
  85         if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100); \r
  86       }\r
  87     }\r
  88 \r
  89     if (trackm){\r
  90       if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){\r
  91         if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);\r
  92         if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100); \r
  93       }\r
  94     }\r
  95     if (vertex->GetStatus()==-100) continue;\r
  96     //\r
  97     Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]);  //I.B.\r
  98     Int_t clayer = tracker->GetNearestLayer(xrp);                    //I.B.\r
  99     vertex->SetNBefore(clayer);        //\r
 100     vertex->SetChi2Before(9*clayer);   //\r
 101     vertex->SetNAfter(6-clayer);       //\r
 102     vertex->SetChi2After(0);           //\r
 103     //\r
 104     if (clayer >1 ){ // calculate chi2 before vertex\r
 105       Float_t chi2p = 0, chi2m=0;  \r
 106       //\r
 107       if (trackp){\r
 108         for (Int_t ilayer=0;ilayer<clayer;ilayer++){\r
 109           if (trackp->GetClIndex(ilayer)>=0){\r
 110             chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+\r
 111               trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));\r
 112           }\r
 113           else{\r
 114             chi2p+=9;\r
 115           }\r
 116         }\r
 117       }else{\r
 118         chi2p = 9*clayer;\r
 119       }\r
 120       //\r
 121       if (trackm){\r
 122         for (Int_t ilayer=0;ilayer<clayer;ilayer++){\r
 123           if (trackm->GetClIndex(ilayer)>=0){\r
 124             chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+\r
 125               trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));\r
 126           }\r
 127           else{\r
 128             chi2m+=9;\r
 129           }\r
 130         }\r
 131       }else{\r
 132         chi2m = 9*clayer;\r
 133       }\r
 134       vertex->SetChi2Before(TMath::Min(chi2p,chi2m));\r
 135       if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10);  // track exist before vertex\r
 136     }\r
 137     \r
 138     if (clayer < 5 ){ // calculate chi2 after vertex\r
 139       Float_t chi2p = 0, chi2m=0;  \r
 140       //\r
 141       if (trackp&&TMath::Abs(trackp->GetTgl())<kMinTgl2){\r
 142         for (Int_t ilayer=clayer;ilayer<6;ilayer++){\r
 143           if (trackp->GetClIndex(ilayer)>=0){\r
 144             chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+\r
 145               trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));\r
 146           }\r
 147           else{\r
 148             chi2p+=9;\r
 149           }\r
 150         }\r
 151       }else{\r
 152         chi2p = 0;\r
 153       }\r
 154       //\r
 155       if (trackm&&TMath::Abs(trackm->GetTgl())<kMinTgl2){\r
 156         for (Int_t ilayer=clayer;ilayer<6;ilayer++){\r
 157           if (trackm->GetClIndex(ilayer)>=0){\r
 158             chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+\r
 159               trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));\r
 160           }\r
 161           else{\r
 162             chi2m+=9;\r
 163           }\r
 164         }\r
 165       }else{\r
 166         chi2m = 0;\r
 167       }\r
 168       vertex->SetChi2After(TMath::Max(chi2p,chi2m));\r
 169       if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20);  // track not found in ITS\r
 170     }\r
 171   }\r
 172   //\r
 173 }\r
 174 //------------------------------------------------------------------------\r
 175 void AliITSV0Finder::FindV02(AliESDEvent *event,\r
 176                                AliITStrackerMI *tracker) \r
 177 {\r
 178   //\r
 179   // V0 finder\r
 180   //\r
 181   //  Cuts on DCA -  R dependent\r
 182   //          max distance DCA between 2 tracks cut \r
 183   //          maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);\r
 184   //\r
 185   const Bool_t kCheckPropagate = kFALSE;\r
 186   const Float_t kMaxDist0 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist0();\r
 187   const Float_t kMaxDist1 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist1();\r
 188   const Float_t kMaxDist = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist();\r
 189   const Float_t kMinPointAngle = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle();\r
 190   const Float_t kMinPointAngle2 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle2();\r
 191   const Float_t kMinR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinR();\r
 192   const Float_t kMaxR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxR();\r
 193   const Float_t kMinPABestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPABestConst();\r
 194   const Float_t kMaxRBestConst = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRBestConst();\r
 195   const Float_t kCausality0Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCausality0Cut();\r
 196   const Float_t kLikelihood01Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood01Cut();\r
 197   const Float_t kLikelihood1Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood1Cut();\r
 198   const Float_t kCombinedCut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCombinedCut();\r
 199   const Float_t kMinClFullTrk= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClFullTrk();\r
 200   const Float_t kMinTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl0();\r
 201   const Float_t kMinRTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTgl0();\r
 202 \r
 203   const Float_t kMinNormDistForbTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbTgl0();\r
 204   const Float_t kMinClForb0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClForb0();\r
 205   const Float_t kMinNormDistForb1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb1();\r
 206   const Float_t kMinNormDistForb2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb2();\r
 207   const Float_t kMinNormDistForb3= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb3();\r
 208   const Float_t kMinNormDistForb4= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb4();\r
 209   const Float_t kMinNormDistForb5= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForb5();\r
 210   const Float_t kMinNormDistForbProt= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinNormDistForbProt();\r
 211   const Float_t kMaxPidProbPionForb= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxPidProbPionForb();\r
 212 \r
 213   const Float_t kMinRTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinRTPCdensity();\r
 214   const Float_t kMaxRTPCdensity0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity0();\r
 215   const Float_t kMaxRTPCdensity10= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity10();\r
 216   const Float_t kMaxRTPCdensity20= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity20();\r
 217   const Float_t kMaxRTPCdensity30= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxRTPCdensity30();\r
 218 \r
 219 \r
 220   const Float_t kMinTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTPCdensity();\r
 221   const Float_t kMinTgl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl1();\r
 222 \r
 223   const Float_t kMinchi2before0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before0();\r
 224   const Float_t kMinchi2before1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before1();\r
 225   const Float_t kMinchi2after0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after0();\r
 226   const Float_t kMinchi2after1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after1();\r
 227   const Float_t kAddchi2SharedCl= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2SharedCl();\r
 228   const Float_t kAddchi2NegCl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl0();\r
 229   const Float_t kAddchi2NegCl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl1();\r
 230 \r
 231   const Float_t kSigp0Par0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par0();\r
 232   const Float_t kSigp0Par1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par1();\r
 233   const Float_t kSigp0Par2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par2();\r
 234 \r
 235   const Float_t kSigpPar0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar0();\r
 236   const Float_t kSigpPar1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar1();\r
 237   const Float_t kSigpPar2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar2();\r
 238   const Float_t kMaxDcaLh0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDcaLh0();\r
 239 \r
 240 \r
 241   TObjArray *trackHypothesys = tracker->GetTrackHypothesys();\r
 242   TObjArray *bestHypothesys  = tracker->GetBestHypothesys();\r
 243   TObjArray *originalTracks  = tracker->GetOriginal();\r
 244   //\r
 245   //\r
 246   TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
 247   Int_t ntracks    = event->GetNumberOfTracks(); \r
 248   Int_t nitstracks = trackHypothesys->GetEntriesFast();\r
 249   originalTracks->Expand(ntracks);\r
 250   trackHypothesys->Expand(ntracks);\r
 251   bestHypothesys->Expand(ntracks);\r
 252   //\r
 253   AliHelix * helixes   = new AliHelix[ntracks+2];\r
 254   TObjArray trackarray(ntracks+2);     //array with tracks - with vertex constrain\r
 255   TObjArray trackarrayc(ntracks+2);    //array of "best    tracks" - without vertex constrain\r
 256   TObjArray trackarrayl(ntracks+2);    //array of "longest tracks" - without vertex constrain\r
 257   //Change from Bool_t to Int_t for optimization\r
 258   //  Int_t forbN=0;\r
 259   //  Int_t * forbidden   = new Int_t [ntracks+2];\r
 260   Bool_t * forbidden   = new Bool_t [ntracks+2];\r
 261   Int_t   *itsmap      = new Int_t  [ntracks+2];\r
 262   Float_t *dist        = new Float_t[ntracks+2];\r
 263   Float_t *normdist0   = new Float_t[ntracks+2];\r
 264   Float_t *normdist1   = new Float_t[ntracks+2];\r
 265   Float_t *normdist    = new Float_t[ntracks+2];\r
 266   Float_t *norm        = new Float_t[ntracks+2];\r
 267   Float_t *maxr        = new Float_t[ntracks+2];\r
 268   Float_t *minr        = new Float_t[ntracks+2];\r
 269   Float_t *minPointAngle= new Float_t[ntracks+2];\r
 270   //\r
 271   AliV0 *pvertex      = new AliV0;\r
 272   AliITStrackMI * dummy= new AliITStrackMI;\r
 273   dummy->SetLabel(0);\r
 274   AliITStrackMI  trackat0;    //temporary track for DCA calculation\r
 275   //\r
 276   Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
 277   //\r
 278   // make ITS -  ESD map\r
 279   //\r
 280   for (Int_t itrack=0;itrack<ntracks+2;itrack++) {\r
 281     itsmap[itrack]        = -1;\r
 282     //    forbidden[itrack]     = 0;\r
 283     forbidden[itrack]     = kFALSE;\r
 284     maxr[itrack]          = kMaxR;\r
 285     minr[itrack]          = kMinR;\r
 286     minPointAngle[itrack] = kMinPointAngle;\r
 287   }\r
 288   for (Int_t itrack=0;itrack<nitstracks;itrack++){\r
 289     AliITStrackMI * original =   (AliITStrackMI*)(originalTracks->At(itrack));\r
 290     Int_t           esdindex =   original->GetESDtrack()->GetID();\r
 291     itsmap[esdindex]         =   itrack;\r
 292   }\r
 293   //\r
 294   // create ITS tracks from ESD tracks if not done before\r
 295   //\r
 296   for (Int_t itrack=0;itrack<ntracks;itrack++){\r
 297     if (itsmap[itrack]>=0) continue;\r
 298     AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));\r
 299     //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());\r
 300     //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ(); \r
 301     tpctrack->GetDZ(tracker->GetX(),tracker->GetY(),tracker->GetZ(),tpctrack->GetDP());   //I.B.\r
 302     if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){\r
 303       // tracks which can reach inner part of ITS\r
 304       // propagate track to outer its volume - with correction for material\r
 305       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(tpctrack);  \r
 306     }\r
 307     itsmap[itrack] = nitstracks;\r
 308     originalTracks->AddAt(tpctrack,nitstracks);\r
 309     nitstracks++;\r
 310   }\r
 311   //\r
 312   // fill temporary arrays\r
 313   //\r
 314   for (Int_t itrack=0;itrack<ntracks;itrack++){\r
 315     AliESDtrack *  esdtrack = event->GetTrack(itrack);\r
 316     Int_t          itsindex = itsmap[itrack];\r
 317     AliITStrackMI *original = (AliITStrackMI*)originalTracks->At(itsmap[itrack]);\r
 318     if (!original) continue;\r
 319     AliITStrackMI *bestConst  = 0;\r
 320     AliITStrackMI *bestLong   = 0;\r
 321     AliITStrackMI *best       = 0;    \r
 322     //\r
 323     //\r
 324     TObjArray * array    = (TObjArray*)  trackHypothesys->At(itsindex);\r
 325     Int_t       hentries = (array==0) ?  0 : array->GetEntriesFast();\r
 326     // Get best track with vertex constrain\r
 327     for (Int_t ih=0;ih<hentries;ih++){\r
 328       AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
 329       if (!trackh->GetConstrain()) continue;\r
 330       if (!bestConst) bestConst = trackh;\r
 331       if (trackh->GetNumberOfClusters()>kMinClFullTrk ){\r
 332         bestConst  = trackh;                         // full track -  with minimal chi2\r
 333         break;\r
 334       }\r
 335       if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone())  continue;      \r
 336       bestConst = trackh;\r
 337       break;\r
 338     }\r
 339     // Get best long track without vertex constrain and best track without vertex constrain\r
 340     for (Int_t ih=0;ih<hentries;ih++){\r
 341       AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
 342       if (trackh->GetConstrain()) continue;\r
 343       if (!best)     best     = trackh;\r
 344       if (!bestLong) bestLong = trackh;\r
 345       if (trackh->GetNumberOfClusters()>kMinClFullTrk){\r
 346         bestLong  = trackh;                         // full track -  with minimal chi2\r
 347         break;\r
 348       }\r
 349       if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone())  continue;      \r
 350       bestLong = trackh;        \r
 351     }\r
 352     if (!best) {\r
 353       best     = original;\r
 354       bestLong = original;\r
 355     }\r
 356     //I.B. trackat0 = *bestLong;\r
 357     new (&trackat0) AliITStrackMI(*bestLong);\r
 358     Double_t xx,yy,zz,alpha; \r
 359     if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;\r
 360     \r
 361 \r
 362     alpha = TMath::ATan2(yy,xx);    \r
 363     //    if (!trackat0.Propagate(alpha,0)) continue;    \r
 364     //    trackat0.Propagate(alpha,0); //PH The check on the return value is temporarily disabled (bug 45751) \r
 365     if(!trackat0.Propagate(alpha,0) && kCheckPropagate)continue;\r
 366     // calculate normalized distances to the vertex \r
 367     //\r
 368     Float_t ptfac  = (1.+100.*TMath::Abs(trackat0.GetC()));\r
 369     if ( bestLong->GetNumberOfClusters()>3 ){      \r
 370       dist[itsindex]      = trackat0.GetY();\r
 371       norm[itsindex]      = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
 372       normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
 373       normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
 374       normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
 375       if (!bestConst){\r
 376         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;\r
 377         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;\r
 378         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;\r
 379       }else{\r
 380         if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;\r
 381         if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;\r
 382       }\r
 383     }\r
 384     else{      \r
 385       if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){\r
 386         dist[itsindex] = bestConst->GetD(0);\r
 387         norm[itsindex] = bestConst->GetDnorm(0);\r
 388         normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
 389         normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
 390         normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
 391       }else{\r
 392         dist[itsindex]      = trackat0.GetY();\r
 393         norm[itsindex]      = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
 394         normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
 395         normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
 396         normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
 397         if (TMath::Abs(trackat0.GetTgl())>kMinTgl0){\r
 398           if (normdist[itsindex]<kMinNormDistForbTgl0){\r
 399             //      forbN=1;\r
 400             //      forbidden[itsindex]+=1<<forbN;\r
 401             forbidden[itsindex]=kTRUE;\r
 402           }\r
 403           if (normdist[itsindex]>kMinNormDistForbTgl0) {\r
 404             minr[itsindex] = TMath::Max(kMinRTgl0,minr[itsindex]);\r
 405           }\r
 406         }\r
 407       }\r
 408     }\r
 409 \r
 410 \r
 411     //\r
 412     //-----------------------------------------------------------\r
 413     //Forbid primary track candidates - \r
 414     //\r
 415     //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");\r
 416     //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");\r
 417     //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");\r
 418     //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");\r
 419     //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");\r
 420     //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");\r
 421     //-----------------------------------------------------------\r
 422     if (bestConst){\r
 423       if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>kMinClForb0){\r
 424         //      forbN=2;\r
 425         //      forbidden[itsindex]+=1<<forbN;\r
 426         forbidden[itsindex]=kTRUE;\r
 427       }\r
 428       if (normdist[itsindex]<kMinNormDistForb1 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5){\r
 429         //      forbN=3;\r
 430         //      forbidden[itsindex]+=1<<forbN;\r
 431         forbidden[itsindex]=kTRUE;\r
 432       }\r
 433       if (normdist[itsindex]<kMinNormDistForb2 && bestConst->GetClIndex(0)>=0 && bestConst->GetClIndex(1)>=0 ){\r
 434         //      forbN=4;\r
 435         //      forbidden[itsindex]+=1<<forbN;\r
 436         forbidden[itsindex]=kTRUE;\r
 437       }\r
 438       if (normdist[itsindex]<kMinNormDistForb3 && bestConst->GetClIndex(0)>=0){\r
 439         //      forbN=5;\r
 440         //      forbidden[itsindex]+=1<<forbN;\r
 441         forbidden[itsindex]=kTRUE;\r
 442       }\r
 443       if (normdist[itsindex]<kMinNormDistForb4 && bestConst->GetNormChi2(0)<2){\r
 444         //      forbN=6;\r
 445         //      forbidden[itsindex]+=1<<forbN;\r
 446         forbidden[itsindex]=kTRUE;\r
 447       }\r
 448       if (normdist[itsindex]<kMinNormDistForb5 && bestConst->GetNormChi2(0)<1){\r
 449         //      forbN=7;\r
 450         //      forbidden[itsindex]+=1<<forbN;\r
 451         forbidden[itsindex]=kTRUE;\r
 452       }\r
 453       if (bestConst->GetNormChi2(0)<2.5) {\r
 454         minPointAngle[itsindex]= kMinPABestConst;\r
 455         maxr[itsindex]         = kMaxRBestConst;\r
 456       }\r
 457     }\r
 458     //\r
 459     //forbid daughter kink candidates\r
 460     //\r
 461     if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;\r
 462     Bool_t isElectron = kTRUE;\r
 463     Bool_t isProton   = kTRUE;\r
 464     Double_t pid[5];\r
 465     esdtrack->GetESDpid(pid);\r
 466     for (Int_t i=1;i<5;i++){\r
 467       if (pid[0]<pid[i]) isElectron= kFALSE;\r
 468       if (pid[4]<pid[i]) isProton= kFALSE;\r
 469     }\r
 470     if (isElectron){\r
 471       forbidden[itsindex]=kFALSE;       \r
 472       normdist[itsindex]*=-1;\r
 473     }\r
 474     if (isProton){\r
 475       if (normdist[itsindex]>kMinNormDistForbProt) forbidden[itsindex]=kFALSE;  \r
 476       normdist[itsindex]*=-1;\r
 477     }\r
 478 \r
 479     // We allow all tracks that are not pions\r
 480     if( (pid[1]+pid[2])< kMaxPidProbPionForb ){\r
 481       forbidden[itsindex]=kFALSE;\r
 482     }\r
 483 \r
 484     //\r
 485     // Causality cuts in TPC volume\r
 486     //\r
 487     if (esdtrack->GetTPCdensity(0,10) >kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity0),maxr[itsindex]);\r
 488     if (esdtrack->GetTPCdensity(10,30)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity10),maxr[itsindex]);\r
 489     if (esdtrack->GetTPCdensity(20,40)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity20),maxr[itsindex]);\r
 490     if (esdtrack->GetTPCdensity(30,50)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(kMaxRTPCdensity30),maxr[itsindex]);\r
 491     //\r
 492     if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=kMinRTPCdensity;    \r
 493     //\r
 494     //\r
 495 \r
 496     if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){\r
 497       cstream<<"Track"<<\r
 498         "Tr0.="<<best<<\r
 499         "Tr1.="<<((bestConst)? bestConst:dummy)<<\r
 500         "Tr2.="<<bestLong<<\r
 501         "Tr3.="<<&trackat0<<\r
 502         "Esd.="<<esdtrack<<\r
 503         "Dist="<<dist[itsindex]<<\r
 504         "ND0="<<normdist0[itsindex]<<\r
 505         "ND1="<<normdist1[itsindex]<<\r
 506         "ND="<<normdist[itsindex]<<\r
 507         "Pz="<<primvertex[2]<<\r
 508         "Forbid="<<forbidden[itsindex]<<\r
 509         "\n";\r
 510       //\r
 511     }\r
 512     trackarray.AddAt(best,itsindex);\r
 513     trackarrayc.AddAt(bestConst,itsindex);\r
 514     trackarrayl.AddAt(bestLong,itsindex);\r
 515     new (&helixes[itsindex]) AliHelix(*best);\r
 516   }\r
 517   //\r
 518   //\r
 519   //\r
 520   // first iterration of V0 finder\r
 521   //\r
 522   // AM Comment out for optimization\r
 523   //  Int_t rejectBase=0;\r
 524   //  Int_t cutN=0;\r
 525 \r
 526   for (Int_t iesd0=0;iesd0<ntracks;iesd0++){\r
 527     Int_t itrack0 = itsmap[iesd0];\r
 528     //-AM comment for optimization and store the forbidden value in the debug streamer\r
 529     if (forbidden[itrack0]) continue;\r
 530     AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);\r
 531     if (!btrack0) continue;    \r
 532     AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);\r
 533     //\r
 534     for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){\r
 535       Int_t itrack1 = itsmap[iesd1];\r
 536       //-AM comment for optimization and store the forbidden value in the debug streamer\r
 537       if (forbidden[itrack1]) continue;\r
 538 \r
 539       AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1); \r
 540       if (!btrack1) continue;\r
 541 \r
 542       if ( (btrack0->GetSign()==btrack1->GetSign()) && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;\r
 543 \r
 544       Bool_t isGold = kFALSE;\r
 545       if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){\r
 546         isGold = kTRUE;\r
 547       }\r
 548       //      rejectBase=0;\r
 549       AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);\r
 550       AliHelix &h1 = helixes[itrack0];\r
 551       AliHelix &h2 = helixes[itrack1];\r
 552       //\r
 553       // find linear distance\r
 554       Double_t rmin =0;\r
 555       //\r
 556       //\r
 557       //\r
 558       Double_t phase[2][2]={{0.,0.},{0.,0.}};\r
 559       Double_t radius[2]={0.,0.};\r
 560       Int_t  points = h1.GetRPHIintersections(h2, phase, radius);\r
 561       if    (points==0) {\r
 562         //      cutN=1;\r
 563         //      rejectBase+=1<<cutN;\r
 564         continue;\r
 565       }\r
 566       Double_t delta[2]={1000000,1000000};        \r
 567       rmin = radius[0];\r
 568       h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);\r
 569       if (points==2){    \r
 570         if (radius[1]<rmin) rmin = radius[1];\r
 571         h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);\r
 572       }\r
 573       rmin = TMath::Sqrt(rmin);\r
 574       Double_t distance = 0;\r
 575       Double_t radiusC  = 0;\r
 576       Int_t    iphase   = 0;\r
 577       if (points==1 || delta[0]<delta[1]){\r
 578         distance = TMath::Sqrt(delta[0]);\r
 579         radiusC  = TMath::Sqrt(radius[0]);\r
 580       }else{\r
 581         distance = TMath::Sqrt(delta[1]);\r
 582         radiusC  = TMath::Sqrt(radius[1]);\r
 583         iphase=1;\r
 584       }\r
 585       if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])){\r
 586         //      cutN=2;\r
 587         //rejectBase+=1<<cutN;\r
 588         continue;\r
 589       }\r
 590       if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])){\r
 591         //      cutN=3;\r
 592         //      rejectBase+=1<<cutN;\r
 593         continue;\r
 594       } \r
 595       Float_t maxDist  = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));      \r
 596       if (distance>maxDist){\r
 597         //      cutN=4;\r
 598         //      rejectBase+=1<<cutN;\r
 599         continue;\r
 600       }\r
 601       Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);\r
 602       if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) {\r
 603         //      cutN=5;\r
 604         //      rejectBase+=1<<cutN;\r
 605         continue;\r
 606       }\r
 607       //\r
 608       //\r
 609       //      Double_t distance = TestV0(h1,h2,pvertex,rmin);\r
 610       //\r
 611       //       if (distance>maxDist)           continue;\r
 612       //       if (pvertex->GetRr()<kMinR)     continue;\r
 613       //       if (pvertex->GetRr()>kMaxR)     continue;\r
 614       AliITStrackMI * track0=btrack0;\r
 615       AliITStrackMI * track1=btrack1;\r
 616       //      if (pvertex->GetRr()<3.5){  \r
 617       if (radiusC<3.5){  \r
 618         //use longest tracks inside the pipe\r
 619         track0 = (AliITStrackMI*)trackarrayl.At(itrack0);\r
 620         track1 = (AliITStrackMI*)trackarrayl.At(itrack1);\r
 621       }      \r
 622       //\r
 623       //\r
 624       \r
 625 \r
 626  \r
 627       pvertex->SetParamN(*track0);\r
 628       pvertex->SetParamP(*track1);\r
 629       pvertex->Update(primvertex);\r
 630       pvertex->SetClusters(track0->ClIndex(),track1->ClIndex());  // register clusters\r
 631 \r
 632       // Define gamma, K0, lambda and lambda_bar from the decay particles and calculate the chi2      \r
 633       AliKFVertex vertexKF;\r
 634 \r
 635       vertexKF.X() = tracker->GetX();\r
 636       vertexKF.Y() = tracker->GetY();\r
 637       vertexKF.Z() = tracker->GetZ();\r
 638       vertexKF.Covariance(0,0) = tracker->GetSigmaX()*tracker->GetSigmaX();\r
 639       vertexKF.Covariance(1,2) = tracker->GetSigmaY()*tracker->GetSigmaY();\r
 640       vertexKF.Covariance(2,2) = tracker->GetSigmaZ()*tracker->GetSigmaZ();\r
 641       \r
 642       AliKFParticle elecKF( *(pvertex->GetParamN()) ,11);\r
 643       AliKFParticle posiKF( *(pvertex->GetParamP()) ,-11);\r
 644       AliKFParticle pipKF( *(pvertex->GetParamN()) , 211);\r
 645       AliKFParticle pinKF( *(pvertex->GetParamP()) ,-211);\r
 646       AliKFParticle protKF( *(pvertex->GetParamP()) ,2212);\r
 647       AliKFParticle aproKF ( *(pvertex->GetParamN()) ,-2212);\r
 648 \r
 649 \r
 650       // Gamma\r
 651       AliKFParticle gamKF(elecKF,posiKF);\r
 652       gamKF.SetProductionVertex(vertexKF);\r
 653 \r
 654       Float_t gamKFchi2 = 1000;\r
 655       if ( gamKF.GetNDF()!=0 ){\r
 656         gamKFchi2 = gamKF.GetChi2()/gamKF.GetNDF();\r
 657       }\r
 658 \r
 659       Float_t massG=0.;\r
 660       Float_t sigmaMG=0.001;\r
 661       gamKF.SetMassConstraint(massG,sigmaMG);\r
 662 \r
 663       Float_t gamKFchi2C = 1000;\r
 664       if ( gamKF.GetNDF()!=0 ){\r
 665         gamKFchi2C = gamKF.GetChi2()/gamKF.GetNDF();\r
 666       }\r
 667 \r
 668       //K0 short\r
 669       AliKFParticle k0KF(pipKF,pinKF);\r
 670       k0KF.SetProductionVertex(vertexKF);\r
 671 \r
 672       Float_t k0KFchi2 = 1000;\r
 673       if ( k0KF.GetNDF()!=0 ){\r
 674         k0KFchi2 = k0KF.GetChi2()/k0KF.GetNDF();\r
 675       }\r
 676 \r
 677       //Lambda\r
 678       AliKFParticle lambdaKF(protKF,pinKF);\r
 679       lambdaKF.SetProductionVertex(vertexKF);\r
 680 \r
 681       Float_t lambdaKFchi2 = 1000;\r
 682       if ( lambdaKF.GetNDF()!=0 ){\r
 683         lambdaKFchi2 = lambdaKF.GetChi2()/lambdaKF.GetNDF();\r
 684       }\r
 685 \r
 686       //Lambda_bar\r
 687       AliKFParticle alambKF(aproKF,pipKF);\r
 688       alambKF.SetProductionVertex(vertexKF);\r
 689 \r
 690       Float_t alambKFchi2 = 1000;\r
 691       if ( alambKF.GetNDF()!=0 ){\r
 692         alambKFchi2 = alambKF.GetChi2()/alambKF.GetNDF();\r
 693       }\r
 694 \r
 695 \r
 696 \r
 697 \r
 698 \r
 699       if (pvertex->GetRr()<kMinR){\r
 700         //      cutN=6;\r
 701         //      rejectBase+=1<<cutN;\r
 702         continue;\r
 703       }\r
 704       if (pvertex->GetRr()>kMaxR){\r
 705         //      cutN=7;\r
 706         //      rejectBase+=1<<cutN;\r
 707         continue;\r
 708       }\r
 709       if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle){\r
 710         //      cutN=8;\r
 711         //      rejectBase+=1<<cutN;\r
 712         continue;\r
 713       }\r
 714 //Bo:      if (pvertex->GetDist2()>maxDist) continue;\r
 715 \r
 716       if (pvertex->GetDcaV0Daughters()>maxDist){\r
 717         //      cutN=9;\r
 718         //      rejectBase+=1<<cutN;\r
 719         continue;\r
 720       }\r
 721 //Bo:        pvertex->SetLab(0,track0->GetLabel());\r
 722 //Bo:        pvertex->SetLab(1,track1->GetLabel());\r
 723       pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
 724       pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
 725       //      \r
 726       AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;      \r
 727       AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;\r
 728 \r
 729       //\r
 730       //\r
 731       TObjArray * array0b     = (TObjArray*)bestHypothesys->At(itrack0);\r
 732       if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<kMinTgl1) {\r
 733         tracker->SetCurrentEsdTrack(itrack0);\r
 734         tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack0),itrack0, kFALSE);\r
 735       }\r
 736       TObjArray * array1b    = (TObjArray*)bestHypothesys->At(itrack1);\r
 737       if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<kMinTgl1) { \r
 738         tracker->SetCurrentEsdTrack(itrack1);\r
 739         tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack1),itrack1, kFALSE);\r
 740       }\r
 741       //\r
 742       AliITStrackMI * track0b = (AliITStrackMI*)originalTracks->At(itrack0);\r
 743       AliITStrackMI * track1b = (AliITStrackMI*)originalTracks->At(itrack1);\r
 744       AliITStrackMI * track0l = (AliITStrackMI*)originalTracks->At(itrack0);\r
 745       AliITStrackMI * track1l = (AliITStrackMI*)originalTracks->At(itrack1);\r
 746       \r
 747       Float_t minchi2before0=kMinchi2before0;\r
 748       Float_t minchi2before1=kMinchi2before1;\r
 749       Float_t minchi2after0 =kMinchi2after0;\r
 750       Float_t minchi2after1 =kMinchi2after1;\r
 751       Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]);  //I.B.\r
 752       Int_t maxLayer = tracker->GetNearestLayer(xrp);                   //I.B.\r
 753       \r
 754       if (array0b) for (Int_t i=0;i<5;i++){\r
 755         // best track after vertex\r
 756         AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);\r
 757         if (!btrack) continue;\r
 758         if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;     \r
 759         //      if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {\r
 760         if (btrack->GetX()<pvertex->GetRr()-2.) {\r
 761           if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){\r
 762             Float_t sumchi2= 0;\r
 763             Float_t sumn   = 0;\r
 764             if (maxLayer<3){   // take prim vertex as additional measurement\r
 765               if (normdist[itrack0]>0 && htrackc0){\r
 766                 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);\r
 767               }else{\r
 768                 sumchi2 +=  TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);\r
 769               }\r
 770               sumn    +=  3-maxLayer;\r
 771             }\r
 772             for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
 773               sumn+=1.;       \r
 774               if (btrack->GetClIndex(ilayer)<0){\r
 775                 sumchi2+=kAddchi2NegCl0;\r
 776                 continue;\r
 777               }else{\r
 778                 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
 779                 for (Int_t itrack=0;itrack<4;itrack++){\r
 780                   AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
 781                   if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack0){\r
 782                     sumchi2+=kAddchi2SharedCl;  //shared cluster\r
 783                     break;\r
 784                   }\r
 785                 }\r
 786                 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
 787                 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));            \r
 788               }\r
 789             }\r
 790             sumchi2/=sumn;\r
 791             if (sumchi2<minchi2before0) minchi2before0=sumchi2; \r
 792           }\r
 793           continue;   //safety space - Geo manager will give exact layer\r
 794         }\r
 795         track0b       = btrack;\r
 796         minchi2after0 = btrack->GetNormChi2(i);\r
 797         break;\r
 798       }\r
 799       if (array1b) for (Int_t i=0;i<5;i++){\r
 800         // best track after vertex\r
 801         AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);\r
 802         if (!btrack) continue;\r
 803         if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;     \r
 804         //      if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){\r
 805         if (btrack->GetX()<pvertex->GetRr()-2){\r
 806           if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){\r
 807             Float_t sumchi2= 0;\r
 808             Float_t sumn   = 0;\r
 809             if (maxLayer<3){   // take prim vertex as additional measurement\r
 810               if (normdist[itrack1]>0 && htrackc1){\r
 811                 sumchi2 +=  TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);\r
 812               }else{\r
 813                 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);\r
 814               }\r
 815               sumn    +=  3-maxLayer;\r
 816             }\r
 817             for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
 818               sumn+=1.;\r
 819               if (btrack->GetClIndex(ilayer)<0){\r
 820                 sumchi2+=kAddchi2NegCl1;\r
 821                 continue;\r
 822               }else{\r
 823                 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
 824                 for (Int_t itrack=0;itrack<4;itrack++){\r
 825                   AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
 826                   if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack1){\r
 827                     sumchi2+=kAddchi2SharedCl;  //shared cluster\r
 828                     break;\r
 829                   }\r
 830                 }\r
 831                 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
 832                 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));            \r
 833               }\r
 834             }\r
 835             sumchi2/=sumn;\r
 836             if (sumchi2<minchi2before1) minchi2before1=sumchi2; \r
 837           }\r
 838           continue;   //safety space - Geo manager will give exact layer           \r
 839         }\r
 840         track1b = btrack;\r
 841         minchi2after1 = btrack->GetNormChi2(i);\r
 842         break;\r
 843       }\r
 844       //\r
 845       // position resolution - used for DCA cut\r
 846       Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+\r
 847         (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+\r
 848         (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());\r
 849       sigmad =TMath::Sqrt(sigmad)+0.04;\r
 850       if (pvertex->GetRr()>50){\r
 851         Double_t cov0[15],cov1[15];\r
 852         track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);\r
 853         track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);\r
 854         sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+\r
 855           (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+\r
 856           (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);\r
 857         sigmad =TMath::Sqrt(sigmad)+0.05;\r
 858       }\r
 859       //       \r
 860       AliV0 vertex2;\r
 861       vertex2.SetParamN(*track0b);\r
 862       vertex2.SetParamP(*track1b);\r
 863       vertex2.Update(primvertex);\r
 864       //Bo:      if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
 865       if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
 866         pvertex->SetParamN(*track0b);\r
 867         pvertex->SetParamP(*track1b);\r
 868         pvertex->Update(primvertex);\r
 869         pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex());  // register clusters\r
 870         pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
 871         pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
 872       }\r
 873       pvertex->SetDistSigma(sigmad);\r
 874       //Bo:      pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);       \r
 875       pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);\r
 876       //\r
 877       // define likelihhod and causalities\r
 878       //\r
 879       Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;      \r
 880       if (maxLayer<1){\r
 881         Float_t fnorm0 = normdist[itrack0];\r
 882         if (fnorm0<0) fnorm0*=-3;\r
 883         Float_t fnorm1 = normdist[itrack1];\r
 884         if (fnorm1<0) fnorm1*=-3;\r
 885         if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){\r
 886           pb0    =  TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);\r
 887           pb1    =  TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);\r
 888         }\r
 889         pvertex->SetChi2Before(normdist[itrack0]);\r
 890         pvertex->SetChi2After(normdist[itrack1]);       \r
 891         pvertex->SetNAfter(0);\r
 892         pvertex->SetNBefore(0);\r
 893       }else{\r
 894         pvertex->SetChi2Before(minchi2before0);\r
 895         pvertex->SetChi2After(minchi2before1);\r
 896          if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){\r
 897            pb0    =  TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);\r
 898            pb1    =  TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);\r
 899          }\r
 900          pvertex->SetNAfter(maxLayer);\r
 901          pvertex->SetNBefore(maxLayer);      \r
 902       }\r
 903       if (pvertex->GetRr()<90){\r
 904         pa0  *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
 905         pa1  *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
 906       }\r
 907       if (pvertex->GetRr()<20){\r
 908         pa0  *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;\r
 909         pa1  *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;\r
 910       }\r
 911       //\r
 912       pvertex->SetCausality(pb0,pb1,pa0,pa1);\r
 913       //\r
 914       //  Likelihood calculations  - apply cuts\r
 915       //         \r
 916  \r
 917       // AM - Comment out for optimization and store the v0OK value\r
 918       //      Int_t v0OK = 0;\r
 919       //      Int_t cutOKN=0;\r
 920       Bool_t v0OK = kTRUE;\r
 921 \r
 922 \r
 923       Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];\r
 924       p12        += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];\r
 925       p12         = TMath::Sqrt(p12);                             // "mean" momenta\r
 926 \r
 927       Float_t    sigmap0   = kSigp0Par0+kSigp0Par1/(kSigp0Par2+pvertex->GetRr()); \r
 928       Float_t    sigmap    = kSigpPar0*sigmap0*(kSigpPar1+kSigpPar2*p12);           // "resolution: of point angle - as a function of radius and momenta\r
 929 \r
 930 \r
 931       Float_t causalityA  = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);\r
 932       Float_t causalityB  = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*\r
 933                                         TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));\r
 934       //\r
 935       //Bo:      Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);\r
 936       Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();\r
 937       Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<kMaxDcaLh0)*(lDistNorm<5);\r
 938 \r
 939       Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+\r
 940         0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+\r
 941         0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+\r
 942         0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);\r
 943       //\r
 944       if (causalityA<kCausality0Cut){\r
 945         //      cutOKN=1;\r
 946         //      v0OK += 1<<cutOKN;\r
 947         v0OK = kFALSE;\r
 948       }\r
 949       if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut){\r
 950         //      cutOKN=2;\r
 951         //      v0OK += 1<<cutOKN;\r
 952         v0OK = kFALSE;\r
 953       }\r
 954       if (likelihood1<kLikelihood1Cut){\r
 955         //      cutOKN=3;\r
 956         //      v0OK += 1<<cutOKN;\r
 957         v0OK = kFALSE;\r
 958       }\r
 959       if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut){\r
 960         //      cutOKN=4;\r
 961         //      v0OK += 1<<cutOKN;\r
 962         v0OK = kFALSE;\r
 963       }\r
 964       //\r
 965       //\r
 966       if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){      \r
 967         Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;\r
 968         cstream<<"It0"<<\r
 969           "Tr0.="<<track0<<                       //best without constrain\r
 970           "Tr1.="<<track1<<                       //best without constrain  \r
 971           "posiKF.="<<&posiKF<<                       //KF from track0\r
 972           "elecKF.="<<&elecKF<<                       //KF from track1\r
 973           "Tr0B.="<<track0b<<                     //best without constrain  after vertex\r
 974           "Tr1B.="<<track1b<<                     //best without constrain  after vertex \r
 975           "Tr0C.="<<htrackc0<<                    //best with constrain     if exist\r
 976           "Tr1C.="<<htrackc1<<                    //best with constrain     if exist\r
 977           "Tr0L.="<<track0l<<                     //longest best           \r
 978           "Tr1L.="<<track1l<<                     //longest best\r
 979           "Esd0.="<<track0->GetESDtrack()<<           // esd track0 params\r
 980           "Esd1.="<<track1->GetESDtrack()<<           // esd track1 params\r
 981           "V0.="<<pvertex<<                       //vertex properties\r
 982           "V0b.="<<&vertex2<<                       //vertex properties at "best" track\r
 983           "gamKF.="<<&gamKF<<                          //KF from pvertex\r
 984           "k0KF.="<<&k0KF<<                          //KF from pvertex\r
 985           "lambdaKF.="<<&lambdaKF<<                          //KF from pvertex\r
 986           "alambKF.="<<&lambdaKF<<                          //KF from pvertex\r
 987           "gamKFchi2="<<gamKFchi2<<    //Normalized chi2 from KF assuming gamma momther\r
 988           "gamKFchi2C="<<gamKFchi2C<<    //Normalized chi2 from KF assuming gamma mother+mass constraint\r
 989           "k0KFchi2="<<k0KFchi2<<    //Normalized chi2 from KF assuming K0 mother\r
 990           "lambdaKFchi2="<<lambdaKFchi2<<    //Normalized chi2 from KF assuming Lambda mother\r
 991           "alambKFchi2="<<alambKFchi2<<    //Normalized chi2 from KF assuming lambda_bar mother\r
 992           "ND0="<<normdist[itrack0]<<             //normalize distance for track0\r
 993           "ND1="<<normdist[itrack1]<<             //normalize distance for track1\r
 994           "Gold="<<gold<<                         //\r
 995           // "RejectBase="<<rejectBase<<             //rejection in First itteration\r
 996           "OK="<<v0OK<<\r
 997           "rmin="<<rmin<<\r
 998           "sigmad="<<sigmad<<\r
 999           "Forbid0="<<forbidden[itrack0]<<\r
1000           "Forbid1="<<forbidden[itrack1]<<\r
1001           "\n";\r
1002       }      \r
1003       //      if (rejectBase>0) continue;\r
1004       //if (forbidden[itrack0]>0 ||forbidden[itrack1]>0) continue; \r
1005       //\r
1006       pvertex->SetStatus(0);\r
1007       //      if (rejectBase) {\r
1008       //        pvertex->SetStatus(-100);\r
1009       //}\r
1010       if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {\r
1011         //Bo:     pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());\r
1012         pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg\r
1013         pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos\r
1014         //      if (v0OK==0){\r
1015         if (v0OK){\r
1016           //      AliV0vertex vertexjuri(*track0,*track1);\r
1017           //      vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());\r
1018           //      event->AddV0(&vertexjuri);\r
1019           pvertex->SetStatus(100);\r
1020         }\r
1021         pvertex->SetOnFlyStatus(kTRUE);\r
1022         pvertex->ChangeMassHypothesis(kK0Short);\r
1023         event->AddV0(pvertex);\r
1024       }\r
1025     }\r
1026   }\r
1027   //\r
1028   //\r
1029   // delete temporary arrays\r
1030   //  \r
1031   delete[] forbidden;\r
1032   delete[] minPointAngle;\r
1033   delete[] maxr;\r
1034   delete[] minr;\r
1035   delete[] norm;\r
1036   delete[] normdist;\r
1037   delete[] normdist1;\r
1038   delete[] normdist0;\r
1039   delete[] dist;\r
1040   delete[] itsmap;\r
1041   delete[] helixes;\r
1042   delete   pvertex;\r
1043   delete   dummy;\r
1044 }\r
1045 //------------------------------------------------------------------------\r
1046 void AliITSV0Finder::RefitV02(const AliESDEvent *event,\r
1047                                 AliITStrackerMI *tracker) \r
1048 {\r
1049   //\r
1050   //try to refit  V0s in the third path of the reconstruction\r
1051   //\r
1052   TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
1053   //\r
1054   Int_t  nv0s = event->GetNumberOfV0s();\r
1055   Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
1056   AliV0 v0temp;\r
1057   for (Int_t iv0 = 0; iv0<nv0s;iv0++){\r
1058     AliV0 * v0mi = (AliV0*)event->GetV0(iv0);\r
1059     if (!v0mi) continue;\r
1060     Int_t     itrack0   = v0mi->GetIndex(0);\r
1061     Int_t     itrack1   = v0mi->GetIndex(1);\r
1062     AliESDtrack *esd0   = event->GetTrack(itrack0);\r
1063     AliESDtrack *esd1   = event->GetTrack(itrack1);\r
1064     if (!esd0||!esd1) continue;\r
1065     AliITStrackMI tpc0(*esd0);  \r
1066     AliITStrackMI tpc1(*esd1);\r
1067     Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B. \r
1068     Double_t alpha =TMath::ATan2(y,x);   //I.B.\r
1069     if (v0mi->GetRr()>85){\r
1070       if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1071         v0temp.SetParamN(tpc0);\r
1072         v0temp.SetParamP(tpc1);\r
1073         v0temp.Update(primvertex);\r
1074         if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
1075           "V0.="<<v0mi<<\r
1076           "V0refit.="<<&v0temp<<\r
1077           "Tr0.="<<&tpc0<<\r
1078           "Tr1.="<<&tpc1<<\r
1079           "\n";\r
1080         //Bo:   if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1081         if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1082           v0mi->SetParamN(tpc0);\r
1083           v0mi->SetParamP(tpc1);\r
1084           v0mi->Update(primvertex);\r
1085         }\r
1086       }\r
1087       continue;\r
1088     }\r
1089     if (v0mi->GetRr()>35){\r
1090       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
1091       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);\r
1092       if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1093         v0temp.SetParamN(tpc0);\r
1094         v0temp.SetParamP(tpc1);\r
1095         v0temp.Update(primvertex);\r
1096         if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
1097           "V0.="<<v0mi<<\r
1098           "V0refit.="<<&v0temp<<\r
1099           "Tr0.="<<&tpc0<<\r
1100           "Tr1.="<<&tpc1<<\r
1101           "\n";\r
1102         //Bo:   if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1103         if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1104           v0mi->SetParamN(tpc0);\r
1105           v0mi->SetParamP(tpc1);\r
1106           v0mi->Update(primvertex);\r
1107         }       \r
1108       }\r
1109       continue;\r
1110     }\r
1111     AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
1112     AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);    \r
1113     //    if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
1114     if (tracker->RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && \r
1115         tracker->RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){\r
1116       v0temp.SetParamN(tpc0);\r
1117       v0temp.SetParamP(tpc1);\r
1118       v0temp.Update(primvertex);\r
1119       if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
1120         "V0.="<<v0mi<<\r
1121         "V0refit.="<<&v0temp<<\r
1122         "Tr0.="<<&tpc0<<\r
1123         "Tr1.="<<&tpc1<<\r
1124         "\n";\r
1125       //Bo:      if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1126       if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
1127         v0mi->SetParamN(tpc0);\r
1128         v0mi->SetParamP(tpc1);\r
1129         v0mi->Update(primvertex);\r
1130       } \r
1131     }    \r
1132   }\r
1133 }\r
1134 //------------------------------------------------------------------------\r
1135 \r
1136 \r
1137 AliITSV0Finder::~AliITSV0Finder()\r
1138 {\r
1139   //\r
1140   //destructor\r
1141   //\r
1142   if (fDebugStreamer) {\r
1143     //fDebugStreamer->Close();\r
1144     delete fDebugStreamer;\r
1145   }\r
1146 \r
1147 }\r