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 \r
  43 ClassImp(AliITSV0Finder)\r
  44 \r
  45 \r
  46 AliITSV0Finder::AliITSV0Finder():\r
  47 fDebugStreamer(0)\r
  48  {\r
  49   //Default constructor\r
  50 \r
  51    fDebugStreamer = new TTreeSRedirector("ITSdebug.root");\r
  52 } \r
  53 \r
  54 //------------------------------------------------------------------------\r
  55 void AliITSV0Finder::UpdateTPCV0(const AliESDEvent *event,\r
  56                                    AliITStrackerMI *tracker)\r
  57 {\r
  58   //\r
  59   //try to update, or reject TPC  V0s\r
  60   //\r
  61   const Float_t kMinTgl2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl2();\r
  62 \r
  63   TObjArray *trackHypothesys = tracker->GetTrackHypothesys();\r
  64 \r
  65   Int_t nv0s = event->GetNumberOfV0s();\r
  66   Int_t nitstracks = trackHypothesys->GetEntriesFast();\r
  67 \r
  68   for (Int_t i=0;i<nv0s;i++){\r
  69     AliESDv0 * vertex = event->GetV0(i);\r
  70     Int_t ip = vertex->GetIndex(0);\r
  71     Int_t im = vertex->GetIndex(1);\r
  72     //\r
  73     TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)trackHypothesys->At(ip):0;\r
  74     TObjArray * arraym = (im<nitstracks) ? (TObjArray*)trackHypothesys->At(im):0;\r
  75     AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;\r
  76     AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;\r
  77     //\r
  78     //\r
  79     if (trackp){\r
  80       if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){\r
  81         if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);\r
  82         if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100); \r
  83       }\r
  84     }\r
  85 \r
  86     if (trackm){\r
  87       if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){\r
  88         if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);\r
  89         if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100); \r
  90       }\r
  91     }\r
  92     if (vertex->GetStatus()==-100) continue;\r
  93     //\r
  94     Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]);  //I.B.\r
  95     Int_t clayer = tracker->GetNearestLayer(xrp);                    //I.B.\r
  96     vertex->SetNBefore(clayer);        //\r
  97     vertex->SetChi2Before(9*clayer);   //\r
  98     vertex->SetNAfter(6-clayer);       //\r
  99     vertex->SetChi2After(0);           //\r
 100     //\r
 101     if (clayer >1 ){ // calculate chi2 before vertex\r
 102       Float_t chi2p = 0, chi2m=0;  \r
 103       //\r
 104       if (trackp){\r
 105         for (Int_t ilayer=0;ilayer<clayer;ilayer++){\r
 106           if (trackp->GetClIndex(ilayer)>=0){\r
 107             chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+\r
 108               trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));\r
 109           }\r
 110           else{\r
 111             chi2p+=9;\r
 112           }\r
 113         }\r
 114       }else{\r
 115         chi2p = 9*clayer;\r
 116       }\r
 117       //\r
 118       if (trackm){\r
 119         for (Int_t ilayer=0;ilayer<clayer;ilayer++){\r
 120           if (trackm->GetClIndex(ilayer)>=0){\r
 121             chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+\r
 122               trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));\r
 123           }\r
 124           else{\r
 125             chi2m+=9;\r
 126           }\r
 127         }\r
 128       }else{\r
 129         chi2m = 9*clayer;\r
 130       }\r
 131       vertex->SetChi2Before(TMath::Min(chi2p,chi2m));\r
 132       if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10);  // track exist before vertex\r
 133     }\r
 134     \r
 135     if (clayer < 5 ){ // calculate chi2 after vertex\r
 136       Float_t chi2p = 0, chi2m=0;  \r
 137       //\r
 138       if (trackp&&TMath::Abs(trackp->GetTgl())<kMinTgl2){\r
 139         for (Int_t ilayer=clayer;ilayer<6;ilayer++){\r
 140           if (trackp->GetClIndex(ilayer)>=0){\r
 141             chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+\r
 142               trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));\r
 143           }\r
 144           else{\r
 145             chi2p+=9;\r
 146           }\r
 147         }\r
 148       }else{\r
 149         chi2p = 0;\r
 150       }\r
 151       //\r
 152       if (trackm&&TMath::Abs(trackm->GetTgl())<kMinTgl2){\r
 153         for (Int_t ilayer=clayer;ilayer<6;ilayer++){\r
 154           if (trackm->GetClIndex(ilayer)>=0){\r
 155             chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+\r
 156               trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));\r
 157           }\r
 158           else{\r
 159             chi2m+=9;\r
 160           }\r
 161         }\r
 162       }else{\r
 163         chi2m = 0;\r
 164       }\r
 165       vertex->SetChi2After(TMath::Max(chi2p,chi2m));\r
 166       if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20);  // track not found in ITS\r
 167     }\r
 168   }\r
 169   //\r
 170 }\r
 171 //------------------------------------------------------------------------\r
 172 void AliITSV0Finder::FindV02(AliESDEvent *event,\r
 173                                AliITStrackerMI *tracker) \r
 174 {\r
 175   //\r
 176   // V0 finder\r
 177   //\r
 178   //  Cuts on DCA -  R dependent\r
 179   //          max distance DCA between 2 tracks cut \r
 180   //          maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);\r
 181   //\r
 182   const Float_t kMaxDist0 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist0();\r
 183   const Float_t kMaxDist1 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist1();\r
 184   const Float_t kMaxDist = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxDist();\r
 185   const Float_t kMinPointAngle = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle();\r
 186   const Float_t kMinPointAngle2 = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinPointAngle2();\r
 187   const Float_t kMinR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinR();\r
 188   const Float_t kMaxR = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMaxR();\r
 189   const Float_t kCausality0Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCausality0Cut();\r
 190   const Float_t kLikelihood01Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood01Cut();\r
 191   const Float_t kLikelihood1Cut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetLikelihood1Cut();\r
 192   const Float_t kCombinedCut = AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetCombinedCut();\r
 193   //  const Float_t kMinClFullTrk= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinClFullTrk();\r
 194   const Float_t kMinTgl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl0();\r
 195   const Float_t kMinTPCdensity= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTPCdensity();\r
 196   const Float_t kMinTgl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinTgl1();\r
 197 \r
 198   const Float_t kMinchi2before0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before0();\r
 199   const Float_t kMinchi2before1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2before1();\r
 200   const Float_t kMinchi2after0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after0();\r
 201   const Float_t kMinchi2after1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetMinchi2after1();\r
 202   const Float_t kAddchi2SharedCl= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2SharedCl();\r
 203   const Float_t kAddchi2NegCl0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl0();\r
 204   const Float_t kAddchi2NegCl1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetAddchi2NegCl1();\r
 205 \r
 206   const Float_t kSigp0Par0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par0();\r
 207   const Float_t kSigp0Par1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par1();\r
 208   const Float_t kSigp0Par2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigp0Par2();\r
 209 \r
 210   const Float_t kSigpPar0= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar0();\r
 211   const Float_t kSigpPar1= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar1();\r
 212   const Float_t kSigpPar2= AliITSReconstructor::GetRecoParam()->GetESDV0Params()->GetSigpPar2();\r
 213  \r
 214 \r
 215   TObjArray *trackHypothesys = tracker->GetTrackHypothesys();\r
 216   TObjArray *bestHypothesys  = tracker->GetBestHypothesys();\r
 217   TObjArray *originalTracks  = tracker->GetOriginal();\r
 218   //\r
 219   //\r
 220   TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
 221   Int_t ntracks    = event->GetNumberOfTracks(); \r
 222   Int_t nitstracks = trackHypothesys->GetEntriesFast();\r
 223   originalTracks->Expand(ntracks);\r
 224   trackHypothesys->Expand(ntracks);\r
 225   bestHypothesys->Expand(ntracks);\r
 226   //\r
 227   AliHelix * helixes   = new AliHelix[ntracks+2];\r
 228   TObjArray trackarray(ntracks+2);     //array with tracks - with vertex constrain\r
 229   TObjArray trackarrayc(ntracks+2);    //array of "best    tracks" - without vertex constrain\r
 230   TObjArray trackarrayl(ntracks+2);    //array of "longest tracks" - without vertex constrain\r
 231   Bool_t * forbidden   = new Bool_t [ntracks+2];\r
 232   Int_t   *itsmap      = new Int_t  [ntracks+2];\r
 233   Float_t *dist        = new Float_t[ntracks+2];\r
 234   Float_t *normdist0   = new Float_t[ntracks+2];\r
 235   Float_t *normdist1   = new Float_t[ntracks+2];\r
 236   Float_t *normdist    = new Float_t[ntracks+2];\r
 237   Float_t *norm        = new Float_t[ntracks+2];\r
 238   Float_t *maxr        = new Float_t[ntracks+2];\r
 239   Float_t *minr        = new Float_t[ntracks+2];\r
 240   Float_t *minPointAngle= new Float_t[ntracks+2];\r
 241   //\r
 242   AliV0 *pvertex      = new AliV0;\r
 243   AliITStrackMI * dummy= new AliITStrackMI;\r
 244   dummy->SetLabel(0);\r
 245   AliITStrackMI  trackat0;    //temporary track for DCA calculation\r
 246   //\r
 247   Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
 248   //\r
 249   // make ITS -  ESD map\r
 250   //\r
 251   for (Int_t itrack=0;itrack<ntracks+2;itrack++) {\r
 252     itsmap[itrack]        = -1;\r
 253     forbidden[itrack]     = kFALSE;\r
 254     maxr[itrack]          = kMaxR;\r
 255     minr[itrack]          = kMinR;\r
 256     minPointAngle[itrack] = kMinPointAngle;\r
 257   }\r
 258   for (Int_t itrack=0;itrack<nitstracks;itrack++){\r
 259     AliITStrackMI * original =   (AliITStrackMI*)(originalTracks->At(itrack));\r
 260     Int_t           esdindex =   original->GetESDtrack()->GetID();\r
 261     itsmap[esdindex]         =   itrack;\r
 262   }\r
 263   //\r
 264   // create ITS tracks from ESD tracks if not done before\r
 265   //\r
 266   for (Int_t itrack=0;itrack<ntracks;itrack++){\r
 267     if (itsmap[itrack]>=0) continue;\r
 268     AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));\r
 269     //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());\r
 270     //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ(); \r
 271     tpctrack->GetDZ(tracker->GetX(),tracker->GetY(),tracker->GetZ(),tpctrack->GetDP());   //I.B.\r
 272     if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){\r
 273       // tracks which can reach inner part of ITS\r
 274       // propagate track to outer its volume - with correction for material\r
 275       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(tpctrack);  \r
 276     }\r
 277     itsmap[itrack] = nitstracks;\r
 278     originalTracks->AddAt(tpctrack,nitstracks);\r
 279     nitstracks++;\r
 280   }\r
 281   //\r
 282   // fill temporary arrays\r
 283   //\r
 284   for (Int_t itrack=0;itrack<ntracks;itrack++){\r
 285     AliESDtrack *  esdtrack = event->GetTrack(itrack);\r
 286     Int_t          itsindex = itsmap[itrack];\r
 287     AliITStrackMI *original = (AliITStrackMI*)originalTracks->At(itsmap[itrack]);\r
 288     if (!original) continue;\r
 289     AliITStrackMI *bestConst  = 0;\r
 290     AliITStrackMI *bestLong   = 0;\r
 291     AliITStrackMI *best       = 0;    \r
 292     //\r
 293     //\r
 294     TObjArray * array    = (TObjArray*)  trackHypothesys->At(itsindex);\r
 295     Int_t       hentries = (array==0) ?  0 : array->GetEntriesFast();\r
 296     // Get best track with vertex constrain\r
 297     for (Int_t ih=0;ih<hentries;ih++){\r
 298       AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
 299       if (!trackh->GetConstrain()) continue;\r
 300       if (!bestConst) bestConst = trackh;\r
 301       if (trackh->GetNumberOfClusters()>5.0){\r
 302         bestConst  = trackh;                         // full track -  with minimal chi2\r
 303         break;\r
 304       }\r
 305       if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone())  continue;      \r
 306       bestConst = trackh;\r
 307       break;\r
 308     }\r
 309     // Get best long track without vertex constrain and best track without vertex constrain\r
 310     for (Int_t ih=0;ih<hentries;ih++){\r
 311       AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);\r
 312       if (trackh->GetConstrain()) continue;\r
 313       if (!best)     best     = trackh;\r
 314       if (!bestLong) bestLong = trackh;\r
 315       if (trackh->GetNumberOfClusters()>5.0){\r
 316         bestLong  = trackh;                         // full track -  with minimal chi2\r
 317         break;\r
 318       }\r
 319       if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone())  continue;      \r
 320       bestLong = trackh;        \r
 321     }\r
 322     if (!best) {\r
 323       best     = original;\r
 324       bestLong = original;\r
 325     }\r
 326     //I.B. trackat0 = *bestLong;\r
 327     new (&trackat0) AliITStrackMI(*bestLong);\r
 328     Double_t xx,yy,zz,alpha; \r
 329     if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;\r
 330     alpha = TMath::ATan2(yy,xx);    \r
 331     //    if (!trackat0.Propagate(alpha,0)) continue;    \r
 332     trackat0.Propagate(alpha,0); //PH The check on the return value is temporarily disabled (bug 45751) \r
 333     // calculate normalized distances to the vertex \r
 334     //\r
 335     Float_t ptfac  = (1.+100.*TMath::Abs(trackat0.GetC()));\r
 336     if ( bestLong->GetNumberOfClusters()>3 ){      \r
 337       dist[itsindex]      = trackat0.GetY();\r
 338       norm[itsindex]      = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
 339       normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
 340       normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
 341       normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
 342       if (!bestConst){\r
 343         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;\r
 344         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;\r
 345         if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;\r
 346       }else{\r
 347         if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;\r
 348         if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;\r
 349       }\r
 350     }\r
 351     else{      \r
 352       if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){\r
 353         dist[itsindex] = bestConst->GetD(0);\r
 354         norm[itsindex] = bestConst->GetDnorm(0);\r
 355         normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
 356         normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);\r
 357         normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
 358       }else{\r
 359         dist[itsindex]      = trackat0.GetY();\r
 360         norm[itsindex]      = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());\r
 361         normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);\r
 362         normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));\r
 363         normdist[itsindex]  = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);\r
 364         if (TMath::Abs(trackat0.GetTgl())>kMinTgl0){\r
 365           if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;\r
 366           if (normdist[itsindex]>3) {\r
 367             minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);\r
 368           }\r
 369         }\r
 370       }\r
 371     }\r
 372     //\r
 373     //-----------------------------------------------------------\r
 374     //Forbid primary track candidates - \r
 375     //\r
 376     //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");\r
 377     //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");\r
 378     //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");\r
 379     //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");\r
 380     //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");\r
 381     //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");\r
 382     //-----------------------------------------------------------\r
 383     if (bestConst){\r
 384       if (bestLong->GetNumberOfClusters()<4       && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5)               forbidden[itsindex]=kTRUE;\r
 385       if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5)               forbidden[itsindex]=kTRUE;\r
 386       if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>=0 && bestConst->GetClIndex(1)>=0 ) forbidden[itsindex]=kTRUE;\r
 387       if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>=0)                              forbidden[itsindex]=kTRUE;\r
 388       if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2)                             forbidden[itsindex]=kTRUE;\r
 389       if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1)                             forbidden[itsindex]=kTRUE;      \r
 390       if (bestConst->GetNormChi2(0)<2.5) {\r
 391         minPointAngle[itsindex]= 0.9999;\r
 392         maxr[itsindex]         = 10;\r
 393       }\r
 394     }\r
 395     //\r
 396     //forbid daughter kink candidates\r
 397     //\r
 398     if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;\r
 399     Bool_t isElectron = kTRUE;\r
 400     Bool_t isProton   = kTRUE;\r
 401     Double_t pid[5];\r
 402     esdtrack->GetESDpid(pid);\r
 403     for (Int_t i=1;i<5;i++){\r
 404       if (pid[0]<pid[i]) isElectron= kFALSE;\r
 405       if (pid[4]<pid[i]) isProton= kFALSE;\r
 406     }\r
 407     if (isElectron){\r
 408       forbidden[itsindex]=kFALSE;       \r
 409       normdist[itsindex]*=-1;\r
 410     }\r
 411     if (isProton){\r
 412       if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;     \r
 413       normdist[itsindex]*=-1;\r
 414     }\r
 415 \r
 416     //\r
 417     // Causality cuts in TPC volume\r
 418     //\r
 419     if (esdtrack->GetTPCdensity(0,10) >kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);\r
 420     if (esdtrack->GetTPCdensity(10,30)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);\r
 421     if (esdtrack->GetTPCdensity(20,40)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);\r
 422     if (esdtrack->GetTPCdensity(30,50)>kMinTPCdensity)  maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);\r
 423     //\r
 424     if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;    \r
 425     //\r
 426     //\r
 427     if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){\r
 428       cstream<<"Track"<<\r
 429         "Tr0.="<<best<<\r
 430         "Tr1.="<<((bestConst)? bestConst:dummy)<<\r
 431         "Tr2.="<<bestLong<<\r
 432         "Tr3.="<<&trackat0<<\r
 433         "Esd.="<<esdtrack<<\r
 434         "Dist="<<dist[itsindex]<<\r
 435         "ND0="<<normdist0[itsindex]<<\r
 436         "ND1="<<normdist1[itsindex]<<\r
 437         "ND="<<normdist[itsindex]<<\r
 438         "Pz="<<primvertex[2]<<\r
 439         "Forbid="<<forbidden[itsindex]<<\r
 440         "\n";\r
 441       //\r
 442     }\r
 443     trackarray.AddAt(best,itsindex);\r
 444     trackarrayc.AddAt(bestConst,itsindex);\r
 445     trackarrayl.AddAt(bestLong,itsindex);\r
 446     new (&helixes[itsindex]) AliHelix(*best);\r
 447   }\r
 448   //\r
 449   //\r
 450   //\r
 451   // first iterration of V0 finder\r
 452   //\r
 453 \r
 454 \r
 455 \r
 456   for (Int_t iesd0=0;iesd0<ntracks;iesd0++){\r
 457     Int_t itrack0 = itsmap[iesd0];\r
 458     if (forbidden[itrack0]) continue;\r
 459     AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);\r
 460     if (!btrack0) continue;    \r
 461     if (btrack0->GetSign()>0 && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;\r
 462     AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);\r
 463     //\r
 464     for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){\r
 465       Int_t itrack1 = itsmap[iesd1];\r
 466       if (forbidden[itrack1]) continue;\r
 467 \r
 468       AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1); \r
 469       if (!btrack1) continue;\r
 470       if (btrack1->GetSign()<0 && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;\r
 471       Bool_t isGold = kFALSE;\r
 472       if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){\r
 473         isGold = kTRUE;\r
 474       }\r
 475       AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);\r
 476       AliHelix &h1 = helixes[itrack0];\r
 477       AliHelix &h2 = helixes[itrack1];\r
 478       //\r
 479       // find linear distance\r
 480       Double_t rmin =0;\r
 481       //\r
 482       //\r
 483       //\r
 484       Double_t phase[2][2],radius[2];\r
 485       Int_t  points = h1.GetRPHIintersections(h2, phase, radius);\r
 486       if    (points==0)  continue;\r
 487       Double_t delta[2]={1000000,1000000};        \r
 488       rmin = radius[0];\r
 489       h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);\r
 490       if (points==2){    \r
 491         if (radius[1]<rmin) rmin = radius[1];\r
 492         h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);\r
 493       }\r
 494       rmin = TMath::Sqrt(rmin);\r
 495       Double_t distance = 0;\r
 496       Double_t radiusC  = 0;\r
 497       Int_t    iphase   = 0;\r
 498       if (points==1 || delta[0]<delta[1]){\r
 499         distance = TMath::Sqrt(delta[0]);\r
 500         radiusC  = TMath::Sqrt(radius[0]);\r
 501       }else{\r
 502         distance = TMath::Sqrt(delta[1]);\r
 503         radiusC  = TMath::Sqrt(radius[1]);\r
 504         iphase=1;\r
 505       }\r
 506       if (radiusC<TMath::Max(minr[itrack0],minr[itrack1]))    continue;\r
 507       if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1]))     continue; \r
 508       Float_t maxDist  = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));      \r
 509       if (distance>maxDist) continue;\r
 510       Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);\r
 511       if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;\r
 512       //\r
 513       //\r
 514       //      Double_t distance = TestV0(h1,h2,pvertex,rmin);\r
 515       //\r
 516       //       if (distance>maxDist)           continue;\r
 517       //       if (pvertex->GetRr()<kMinR)     continue;\r
 518       //       if (pvertex->GetRr()>kMaxR)     continue;\r
 519       AliITStrackMI * track0=btrack0;\r
 520       AliITStrackMI * track1=btrack1;\r
 521       //      if (pvertex->GetRr()<3.5){  \r
 522       if (radiusC<3.5){  \r
 523         //use longest tracks inside the pipe\r
 524         track0 = (AliITStrackMI*)trackarrayl.At(itrack0);\r
 525         track1 = (AliITStrackMI*)trackarrayl.At(itrack1);\r
 526       }      \r
 527       //\r
 528       //\r
 529       \r
 530 \r
 531  \r
 532       pvertex->SetParamN(*track0);\r
 533       pvertex->SetParamP(*track1);\r
 534       pvertex->Update(primvertex);\r
 535       pvertex->SetClusters(track0->ClIndex(),track1->ClIndex());  // register clusters\r
 536 \r
 537       AliKFParticle negKF( *(pvertex->GetParamN()) ,11);\r
 538       AliKFParticle posKF( *(pvertex->GetParamP()) ,-11);\r
 539 \r
 540       AliKFParticle v0KF(negKF,posKF);\r
 541       Float_t v0KFchi2= v0KF.GetChi2();\r
 542 \r
 543 \r
 544       if (pvertex->GetRr()<kMinR) continue;\r
 545       if (pvertex->GetRr()>kMaxR) continue;\r
 546       if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;\r
 547 //Bo:      if (pvertex->GetDist2()>maxDist) continue;\r
 548       if (pvertex->GetDcaV0Daughters()>maxDist) continue;\r
 549 //Bo:        pvertex->SetLab(0,track0->GetLabel());\r
 550 //Bo:        pvertex->SetLab(1,track1->GetLabel());\r
 551       pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
 552       pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
 553       //      \r
 554       AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;      \r
 555       AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;\r
 556 \r
 557       //\r
 558       //\r
 559       TObjArray * array0b     = (TObjArray*)bestHypothesys->At(itrack0);\r
 560       if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<kMinTgl1) {\r
 561         tracker->SetCurrentEsdTrack(itrack0);\r
 562         tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack0),itrack0, kFALSE);\r
 563       }\r
 564       TObjArray * array1b    = (TObjArray*)bestHypothesys->At(itrack1);\r
 565       if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<kMinTgl1) { \r
 566         tracker->SetCurrentEsdTrack(itrack1);\r
 567         tracker->FollowProlongationTree((AliITStrackMI*)originalTracks->At(itrack1),itrack1, kFALSE);\r
 568       }\r
 569       //\r
 570       AliITStrackMI * track0b = (AliITStrackMI*)originalTracks->At(itrack0);\r
 571       AliITStrackMI * track1b = (AliITStrackMI*)originalTracks->At(itrack1);\r
 572       AliITStrackMI * track0l = (AliITStrackMI*)originalTracks->At(itrack0);\r
 573       AliITStrackMI * track1l = (AliITStrackMI*)originalTracks->At(itrack1);\r
 574       \r
 575       Float_t minchi2before0=kMinchi2before0;\r
 576       Float_t minchi2before1=kMinchi2before1;\r
 577       Float_t minchi2after0 =kMinchi2after0;\r
 578       Float_t minchi2after1 =kMinchi2after1;\r
 579       Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]);  //I.B.\r
 580       Int_t maxLayer = tracker->GetNearestLayer(xrp);                   //I.B.\r
 581       \r
 582       if (array0b) for (Int_t i=0;i<5;i++){\r
 583         // best track after vertex\r
 584         AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);\r
 585         if (!btrack) continue;\r
 586         if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;     \r
 587         //      if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {\r
 588         if (btrack->GetX()<pvertex->GetRr()-2.) {\r
 589           if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){\r
 590             Float_t sumchi2= 0;\r
 591             Float_t sumn   = 0;\r
 592             if (maxLayer<3){   // take prim vertex as additional measurement\r
 593               if (normdist[itrack0]>0 && htrackc0){\r
 594                 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);\r
 595               }else{\r
 596                 sumchi2 +=  TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);\r
 597               }\r
 598               sumn    +=  3-maxLayer;\r
 599             }\r
 600             for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
 601               sumn+=1.;       \r
 602               if (btrack->GetClIndex(ilayer)<0){\r
 603                 sumchi2+=kAddchi2NegCl0;\r
 604                 continue;\r
 605               }else{\r
 606                 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
 607                 for (Int_t itrack=0;itrack<4;itrack++){\r
 608                   AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
 609                   if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack0){\r
 610                     sumchi2+=kAddchi2SharedCl;  //shared cluster\r
 611                     break;\r
 612                   }\r
 613                 }\r
 614                 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
 615                 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));            \r
 616               }\r
 617             }\r
 618             sumchi2/=sumn;\r
 619             if (sumchi2<minchi2before0) minchi2before0=sumchi2; \r
 620           }\r
 621           continue;   //safety space - Geo manager will give exact layer\r
 622         }\r
 623         track0b       = btrack;\r
 624         minchi2after0 = btrack->GetNormChi2(i);\r
 625         break;\r
 626       }\r
 627       if (array1b) for (Int_t i=0;i<5;i++){\r
 628         // best track after vertex\r
 629         AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);\r
 630         if (!btrack) continue;\r
 631         if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;     \r
 632         //      if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){\r
 633         if (btrack->GetX()<pvertex->GetRr()-2){\r
 634           if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){\r
 635             Float_t sumchi2= 0;\r
 636             Float_t sumn   = 0;\r
 637             if (maxLayer<3){   // take prim vertex as additional measurement\r
 638               if (normdist[itrack1]>0 && htrackc1){\r
 639                 sumchi2 +=  TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);\r
 640               }else{\r
 641                 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);\r
 642               }\r
 643               sumn    +=  3-maxLayer;\r
 644             }\r
 645             for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){\r
 646               sumn+=1.;\r
 647               if (btrack->GetClIndex(ilayer)<0){\r
 648                 sumchi2+=kAddchi2NegCl1;\r
 649                 continue;\r
 650               }else{\r
 651                 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);\r
 652                 for (Int_t itrack=0;itrack<4;itrack++){\r
 653                   AliITStrackerMI::AliITSlayer &layer=tracker->GetLayer(ilayer);\r
 654                   if (layer.GetClusterTracks(itrack,c)>=0 && layer.GetClusterTracks(itrack,c)!=itrack1){\r
 655                     sumchi2+=kAddchi2SharedCl;  //shared cluster\r
 656                     break;\r
 657                   }\r
 658                 }\r
 659                 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));\r
 660                 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));            \r
 661               }\r
 662             }\r
 663             sumchi2/=sumn;\r
 664             if (sumchi2<minchi2before1) minchi2before1=sumchi2; \r
 665           }\r
 666           continue;   //safety space - Geo manager will give exact layer           \r
 667         }\r
 668         track1b = btrack;\r
 669         minchi2after1 = btrack->GetNormChi2(i);\r
 670         break;\r
 671       }\r
 672       //\r
 673       // position resolution - used for DCA cut\r
 674       Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+\r
 675         (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+\r
 676         (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());\r
 677       sigmad =TMath::Sqrt(sigmad)+0.04;\r
 678       if (pvertex->GetRr()>50){\r
 679         Double_t cov0[15],cov1[15];\r
 680         track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);\r
 681         track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);\r
 682         sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+\r
 683           (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+\r
 684           (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);\r
 685         sigmad =TMath::Sqrt(sigmad)+0.05;\r
 686       }\r
 687       //       \r
 688       AliV0 vertex2;\r
 689       vertex2.SetParamN(*track0b);\r
 690       vertex2.SetParamP(*track1b);\r
 691       vertex2.Update(primvertex);\r
 692       //Bo:      if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
 693       if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){\r
 694         pvertex->SetParamN(*track0b);\r
 695         pvertex->SetParamP(*track1b);\r
 696         pvertex->Update(primvertex);\r
 697         pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex());  // register clusters\r
 698         pvertex->SetIndex(0,track0->GetESDtrack()->GetID());\r
 699         pvertex->SetIndex(1,track1->GetESDtrack()->GetID());\r
 700       }\r
 701       pvertex->SetDistSigma(sigmad);\r
 702       //Bo:      pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);       \r
 703       pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);\r
 704       //\r
 705       // define likelihhod and causalities\r
 706       //\r
 707       Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;      \r
 708       if (maxLayer<1){\r
 709         Float_t fnorm0 = normdist[itrack0];\r
 710         if (fnorm0<0) fnorm0*=-3;\r
 711         Float_t fnorm1 = normdist[itrack1];\r
 712         if (fnorm1<0) fnorm1*=-3;\r
 713         if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){\r
 714           pb0    =  TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);\r
 715           pb1    =  TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);\r
 716         }\r
 717         pvertex->SetChi2Before(normdist[itrack0]);\r
 718         pvertex->SetChi2After(normdist[itrack1]);       \r
 719         pvertex->SetNAfter(0);\r
 720         pvertex->SetNBefore(0);\r
 721       }else{\r
 722         pvertex->SetChi2Before(minchi2before0);\r
 723         pvertex->SetChi2After(minchi2before1);\r
 724          if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){\r
 725            pb0    =  TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);\r
 726            pb1    =  TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);\r
 727          }\r
 728          pvertex->SetNAfter(maxLayer);\r
 729          pvertex->SetNBefore(maxLayer);      \r
 730       }\r
 731       if (pvertex->GetRr()<90){\r
 732         pa0  *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
 733         pa1  *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));\r
 734       }\r
 735       if (pvertex->GetRr()<20){\r
 736         pa0  *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;\r
 737         pa1  *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;\r
 738       }\r
 739       //\r
 740       pvertex->SetCausality(pb0,pb1,pa0,pa1);\r
 741       //\r
 742       //  Likelihood calculations  - apply cuts\r
 743       //         \r
 744       Bool_t v0OK = kTRUE;\r
 745       Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];\r
 746       p12        += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];\r
 747       p12         = TMath::Sqrt(p12);                             // "mean" momenta\r
 748 \r
 749       Float_t    sigmap0   = kSigp0Par0+kSigp0Par1/(kSigp0Par2+pvertex->GetRr()); \r
 750       Float_t    sigmap    = kSigpPar0*sigmap0*(kSigpPar1+kSigpPar2*p12);           // "resolution: of point angle - as a function of radius and momenta\r
 751 \r
 752 \r
 753       Float_t causalityA  = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);\r
 754       Float_t causalityB  = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*\r
 755                                         TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));\r
 756       //\r
 757       //Bo:      Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);\r
 758       Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();\r
 759       Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);\r
 760 \r
 761       Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+\r
 762         0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+\r
 763         0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+\r
 764         0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);\r
 765       //\r
 766       if (causalityA<kCausality0Cut)                                          v0OK = kFALSE;\r
 767       if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut)              v0OK = kFALSE;\r
 768       if (likelihood1<kLikelihood1Cut)                                        v0OK = kFALSE;\r
 769       if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;\r
 770       \r
 771       //\r
 772       //\r
 773       if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0){      \r
 774         Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;\r
 775         cstream<<"It0"<<\r
 776           "Tr0.="<<track0<<                       //best without constrain\r
 777           "Tr1.="<<track1<<                       //best without constrain  \r
 778           "posKF.="<<&posKF<<                       //KF from track0\r
 779           "negKF.="<<&negKF<<                       //KF from track1\r
 780           "Tr0B.="<<track0b<<                     //best without constrain  after vertex\r
 781           "Tr1B.="<<track1b<<                     //best without constrain  after vertex \r
 782           "Tr0C.="<<htrackc0<<                    //best with constrain     if exist\r
 783           "Tr1C.="<<htrackc1<<                    //best with constrain     if exist\r
 784           "Tr0L.="<<track0l<<                     //longest best           \r
 785           "Tr1L.="<<track1l<<                     //longest best\r
 786           "Esd0.="<<track0->GetESDtrack()<<           // esd track0 params\r
 787           "Esd1.="<<track1->GetESDtrack()<<           // esd track1 params\r
 788           "V0.="<<pvertex<<                       //vertex properties\r
 789           "V0b.="<<&vertex2<<                       //vertex properties at "best" track\r
 790           "v0KF.="<<&v0KF<<                          //KF from pvertex\r
 791           "chiKF.="<<v0KFchi2<<              // chi2 from KF\r
 792           "ND0="<<normdist[itrack0]<<             //normalize distance for track0\r
 793           "ND1="<<normdist[itrack1]<<             //normalize distance for track1\r
 794           "Gold="<<gold<<                         //\r
 795           //      "RejectBase="<<rejectBase<<             //rejection in First itteration\r
 796           "OK="<<v0OK<<\r
 797           "rmin="<<rmin<<\r
 798           "sigmad="<<sigmad<<\r
 799           "\n";\r
 800       }      \r
 801       //if (rejectBase) continue;\r
 802       //\r
 803       pvertex->SetStatus(0);\r
 804       //      if (rejectBase) {\r
 805       //        pvertex->SetStatus(-100);\r
 806       //}\r
 807       if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {\r
 808         //Bo:     pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());\r
 809         pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg\r
 810         pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos\r
 811         if (v0OK){\r
 812           //      AliV0vertex vertexjuri(*track0,*track1);\r
 813           //      vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());\r
 814           //      event->AddV0(&vertexjuri);\r
 815           pvertex->SetStatus(100);\r
 816         }\r
 817         pvertex->SetOnFlyStatus(kTRUE);\r
 818         pvertex->ChangeMassHypothesis(kK0Short);\r
 819         event->AddV0(pvertex);\r
 820       }\r
 821     }\r
 822   }\r
 823   //\r
 824   //\r
 825   // delete temporary arrays\r
 826   //  \r
 827   delete[] forbidden;\r
 828   delete[] minPointAngle;\r
 829   delete[] maxr;\r
 830   delete[] minr;\r
 831   delete[] norm;\r
 832   delete[] normdist;\r
 833   delete[] normdist1;\r
 834   delete[] normdist0;\r
 835   delete[] dist;\r
 836   delete[] itsmap;\r
 837   delete[] helixes;\r
 838   delete   pvertex;\r
 839 }\r
 840 //------------------------------------------------------------------------\r
 841 void AliITSV0Finder::RefitV02(const AliESDEvent *event,\r
 842                                 AliITStrackerMI *tracker) \r
 843 {\r
 844   //\r
 845   //try to refit  V0s in the third path of the reconstruction\r
 846   //\r
 847   TTreeSRedirector &cstream = *(tracker->GetDebugStreamer());\r
 848   //\r
 849   Int_t  nv0s = event->GetNumberOfV0s();\r
 850   Float_t primvertex[3]={tracker->GetX(),tracker->GetY(),tracker->GetZ()};\r
 851   AliV0 v0temp;\r
 852   for (Int_t iv0 = 0; iv0<nv0s;iv0++){\r
 853     AliV0 * v0mi = (AliV0*)event->GetV0(iv0);\r
 854     if (!v0mi) continue;\r
 855     Int_t     itrack0   = v0mi->GetIndex(0);\r
 856     Int_t     itrack1   = v0mi->GetIndex(1);\r
 857     AliESDtrack *esd0   = event->GetTrack(itrack0);\r
 858     AliESDtrack *esd1   = event->GetTrack(itrack1);\r
 859     if (!esd0||!esd1) continue;\r
 860     AliITStrackMI tpc0(*esd0);  \r
 861     AliITStrackMI tpc1(*esd1);\r
 862     Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B. \r
 863     Double_t alpha =TMath::ATan2(y,x);   //I.B.\r
 864     if (v0mi->GetRr()>85){\r
 865       if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
 866         v0temp.SetParamN(tpc0);\r
 867         v0temp.SetParamP(tpc1);\r
 868         v0temp.Update(primvertex);\r
 869         if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
 870           "V0.="<<v0mi<<\r
 871           "V0refit.="<<&v0temp<<\r
 872           "Tr0.="<<&tpc0<<\r
 873           "Tr1.="<<&tpc1<<\r
 874           "\n";\r
 875         //Bo:   if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
 876         if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
 877           v0mi->SetParamN(tpc0);\r
 878           v0mi->SetParamP(tpc1);\r
 879           v0mi->Update(primvertex);\r
 880         }\r
 881       }\r
 882       continue;\r
 883     }\r
 884     if (v0mi->GetRr()>35){\r
 885       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
 886       AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);\r
 887       if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
 888         v0temp.SetParamN(tpc0);\r
 889         v0temp.SetParamP(tpc1);\r
 890         v0temp.Update(primvertex);\r
 891         if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
 892           "V0.="<<v0mi<<\r
 893           "V0refit.="<<&v0temp<<\r
 894           "Tr0.="<<&tpc0<<\r
 895           "Tr1.="<<&tpc1<<\r
 896           "\n";\r
 897         //Bo:   if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
 898         if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
 899           v0mi->SetParamN(tpc0);\r
 900           v0mi->SetParamP(tpc1);\r
 901           v0mi->Update(primvertex);\r
 902         }       \r
 903       }\r
 904       continue;\r
 905     }\r
 906     AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc0);\r
 907     AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(&tpc1);    \r
 908     //    if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){\r
 909     if (tracker->RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && \r
 910         tracker->RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){\r
 911       v0temp.SetParamN(tpc0);\r
 912       v0temp.SetParamP(tpc1);\r
 913       v0temp.Update(primvertex);\r
 914       if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0) cstream<<"Refit"<<\r
 915         "V0.="<<v0mi<<\r
 916         "V0refit.="<<&v0temp<<\r
 917         "Tr0.="<<&tpc0<<\r
 918         "Tr1.="<<&tpc1<<\r
 919         "\n";\r
 920       //Bo:      if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
 921       if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){\r
 922         v0mi->SetParamN(tpc0);\r
 923         v0mi->SetParamP(tpc1);\r
 924         v0mi->Update(primvertex);\r
 925       } \r
 926     }    \r
 927   }\r
 928 }\r
 929 //------------------------------------------------------------------------\r
 930 \r
 931 \r
 932 AliITSV0Finder::~AliITSV0Finder()\r
 933 {\r
 934   //\r
 935   //destructor\r
 936   //\r
 937   if (fDebugStreamer) {\r
 938     //fDebugStreamer->Close();\r
 939     delete fDebugStreamer;\r
 940   }\r
 941 \r
 942 }\r