PWG3/vertexingHF/AliAnalysisVertexingHF.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
   6  *                                                                        *
   7  * Permission to use, copy, modify and distribute this software and its   *
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  11  * appear in the supporting documentation. The authors make no claims     *
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  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 //----------------------------------------------------------------------------
  17 //    Implementation of the heavy-flavour vertexing analysis class
  18 // Candidates are stored in the AOD as objects deriving from AliAODRecoDecay.
  19 // To be used as a task of AliAnalysisManager by means of the interface
  20 // class AliAnalysisTaskSEVertexingHF.
  21 // An example of usage in the macro AliAnalysisTaskSEVertexingHFTest.C.
  22 //
  23 //  Contact: andrea.dainese@lnl.infn.it
  24 //  Contributors: E.Bruna, G.E.Bruno, A.Dainese, C.Di Gliglio,
  25 //                F.Prino, R.Romita, X.M.Zhang
  26 //----------------------------------------------------------------------------
  27 #include <TFile.h>
  28 #include <TDatabasePDG.h>
  29 #include <TString.h>
  30 #include "AliLog.h"
  31 #include "AliVEvent.h"
  32 #include "AliVVertex.h"
  33 #include "AliVTrack.h"
  34 #include "AliVertexerTracks.h"
  35 #include "AliKFVertex.h"
  36 #include "AliESDEvent.h"
  37 #include "AliESDVertex.h"
  38 #include "AliExternalTrackParam.h"
  39 #include "AliNeutralTrackParam.h"
  40 #include "AliESDtrack.h"
  41 #include "AliESDtrackCuts.h"
  42 #include "AliAODEvent.h"
  43 #include "AliAODRecoDecay.h"
  44 #include "AliAODRecoDecayHF.h"
  45 #include "AliAODRecoDecayHF2Prong.h"
  46 #include "AliAODRecoDecayHF3Prong.h"
  47 #include "AliAODRecoDecayHF4Prong.h"
  48 #include "AliAODRecoCascadeHF.h"
  49 #include "AliAnalysisFilter.h"
  50 #include "AliAnalysisVertexingHF.h"
  51
  52 ClassImp(AliAnalysisVertexingHF)
  53
  54 //----------------------------------------------------------------------------
  55 AliAnalysisVertexingHF::AliAnalysisVertexingHF():
  56 fInputAOD(kFALSE),
  57 fAODMap(0),
  58 fBzkG(0.),
  59 fSecVtxWithKF(kFALSE),
  60 fRecoPrimVtxSkippingTrks(kFALSE),
  61 fRmTrksFromPrimVtx(kFALSE),
  62 fV1(0x0),
  63 fD0toKpi(kTRUE),
  64 fJPSItoEle(kTRUE),
  65 f3Prong(kTRUE),
  66 f4Prong(kTRUE),
  67 fDstar(kTRUE),
  68 fLikeSign(kFALSE),
  69 fTrackFilter(0x0),
  70 fTrackFilterSoftPi(0x0),
  71 fFindVertexForDstar(kTRUE)
  72 {
  73   // Default constructor
  74
  75   SetD0toKpiCuts();
  76   SetBtoJPSICuts();
  77   SetDplusCuts();
  78   SetDsCuts();
  79   SetLcCuts();
  80   SetDstarCuts();
  81   SetD0to4ProngsCuts();
  82 }
  83 //--------------------------------------------------------------------------
  84 AliAnalysisVertexingHF::AliAnalysisVertexingHF(const AliAnalysisVertexingHF &source) :
  85 TNamed(source),
  86 fInputAOD(source.fInputAOD),
  87 fAODMap(source.fAODMap),
  88 fBzkG(source.fBzkG),
  89 fSecVtxWithKF(source.fSecVtxWithKF),
  90 fRecoPrimVtxSkippingTrks(source.fRecoPrimVtxSkippingTrks),
  91 fRmTrksFromPrimVtx(source.fRmTrksFromPrimVtx),
  92 fV1(source.fV1),
  93 fD0toKpi(source.fD0toKpi),
  94 fJPSItoEle(source.fJPSItoEle),
  95 f3Prong(source.f3Prong),
  96 f4Prong(source.f4Prong),
  97 fDstar(source.fDstar),
  98 fLikeSign(source.fLikeSign),
  99 fTrackFilter(source.fTrackFilter),
 100 fTrackFilterSoftPi(source.fTrackFilterSoftPi),
 101 fFindVertexForDstar(source.fFindVertexForDstar)
 102 {
 103   //
 104   // Copy constructor
 105   //
 106   for(Int_t i=0; i<9; i++)  fD0toKpiCuts[i]=source.fD0toKpiCuts[i];
 107   for(Int_t i=0; i<9; i++)  fBtoJPSICuts[i]=source.fBtoJPSICuts[i];
 108   for(Int_t i=0; i<12; i++) fDplusCuts[i]=source.fDplusCuts[i];
 109   for(Int_t i=0; i<13; i++) fDsCuts[i]=source.fDsCuts[i];
 110   for(Int_t i=0; i<12; i++) fLcCuts[i]=source.fLcCuts[i];
 111   for(Int_t i=0; i<5; i++)  fDstarCuts[i]=source.fDstarCuts[i];
 112   for(Int_t i=0; i<9; i++)  fD0to4ProngsCuts[i]=source.fD0to4ProngsCuts[i];
 113 }
 114 //--------------------------------------------------------------------------
 115 AliAnalysisVertexingHF &AliAnalysisVertexingHF::operator=(const AliAnalysisVertexingHF &source)
 116 {
 117   //
 118   // assignment operator
 119   //
 120   if(&source == this) return *this;
 121   fInputAOD = source.fInputAOD;
 122   fBzkG = source.fBzkG;
 123   fSecVtxWithKF = source.fSecVtxWithKF;
 124   fRecoPrimVtxSkippingTrks = source.fRecoPrimVtxSkippingTrks;
 125   fRmTrksFromPrimVtx = source.fRmTrksFromPrimVtx;
 126   fV1 = source.fV1;
 127   fD0toKpi = source.fD0toKpi;
 128   fJPSItoEle = source.fJPSItoEle;
 129   f3Prong = source.f3Prong;
 130   f4Prong = source.f4Prong;
 131   fDstar = source.fDstar;
 132   fLikeSign = source.fLikeSign;
 133   fTrackFilter = source.fTrackFilter;
 134   fTrackFilterSoftPi = source.fTrackFilterSoftPi;
 135   fFindVertexForDstar = source.fFindVertexForDstar;
 136
 137   for(Int_t i=0; i<9; i++)  fD0toKpiCuts[i]=source.fD0toKpiCuts[i];
 138   for(Int_t i=0; i<9; i++)  fBtoJPSICuts[i]=source.fBtoJPSICuts[i];
 139   for(Int_t i=0; i<12; i++) fDplusCuts[i]=source.fDplusCuts[i];
 140   for(Int_t i=0; i<13; i++) fDsCuts[i]=source.fDsCuts[i];
 141   for(Int_t i=0; i<12; i++) fLcCuts[i]=source.fLcCuts[i];
 142   for(Int_t i=0; i<5; i++)  fDstarCuts[i]=source.fDstarCuts[i];
 143   for(Int_t i=0; i<9; i++)  fD0to4ProngsCuts[i]=source.fD0to4ProngsCuts[i];
 144
 145   return *this;
 146 }
 147 //----------------------------------------------------------------------------
 148 AliAnalysisVertexingHF::~AliAnalysisVertexingHF() {
 149   // Destructor
 150   if(fV1) { delete fV1; fV1=0; }
 151   if(fTrackFilter) { delete fTrackFilter; fTrackFilter=0; }
 152   if(fTrackFilterSoftPi) { delete fTrackFilterSoftPi; fTrackFilterSoftPi=0; }
 153 }
 154 //----------------------------------------------------------------------------
 155 void AliAnalysisVertexingHF::FindCandidates(AliVEvent *event,
 156                                             TClonesArray *aodVerticesHFTClArr,
 157                                             TClonesArray *aodD0toKpiTClArr,
 158                                             TClonesArray *aodJPSItoEleTClArr,
 159                                             TClonesArray *aodCharm3ProngTClArr,
 160                                             TClonesArray *aodCharm4ProngTClArr,
 161                                             TClonesArray *aodDstarTClArr,
 162                                             TClonesArray *aodLikeSignTClArr)
 163 {
 164   // Find heavy-flavour vertex candidates
 165   // Input:  ESD or AOD
 166   // Output: AOD (additional branches added)
 167
 168
 169   TString evtype = event->IsA()->GetName();
 170   fInputAOD = ((evtype=="AliAODEvent") ? kTRUE : kFALSE);
 171
 172   if(!aodVerticesHFTClArr) {
 173     printf("ERROR: no aodVerticesHFTClArr");
 174     return;
 175   }
 176   if((fD0toKpi || fDstar) && !aodD0toKpiTClArr) {
 177     printf("ERROR: no aodD0toKpiTClArr");
 178     return;
 179   }
 180   if(fJPSItoEle && !aodJPSItoEleTClArr) {
 181     printf("ERROR: no aodJPSItoEleTClArr");
 182     return;
 183   }
 184   if(f3Prong && !aodCharm3ProngTClArr) {
 185     printf("ERROR: no aodCharm3ProngTClArr");
 186     return;
 187   }
 188   if(f4Prong && !aodCharm4ProngTClArr) {
 189     printf("ERROR: no aodCharm4ProngTClArr");
 190     return;
 191   }
 192   if(fDstar && !aodDstarTClArr) {
 193     printf("ERROR: no aodDstarTClArr");
 194     return;
 195   }
 196   if(fLikeSign && !aodLikeSignTClArr) {
 197     printf("ERROR: no aodLikeSignTClArr");
 198     return;
 199   }
 200
 201   // delete candidates from previous event and create references
 202   Int_t iVerticesHF=0,iD0toKpi=0,iJPSItoEle=0,i3Prong=0,i4Prong=0,iDstar=0,iLikeSign=0;
 203   aodVerticesHFTClArr->Delete();
 204   iVerticesHF = aodVerticesHFTClArr->GetEntriesFast();
 205   TClonesArray &verticesHFRef = *aodVerticesHFTClArr;
 206   if(fD0toKpi || fDstar)   {
 207     aodD0toKpiTClArr->Delete();
 208     iD0toKpi = aodD0toKpiTClArr->GetEntriesFast();
 209   }
 210   if(fJPSItoEle) {
 211     aodJPSItoEleTClArr->Delete();
 212     iJPSItoEle = aodJPSItoEleTClArr->GetEntriesFast();
 213   }
 214   if(f3Prong) {
 215     aodCharm3ProngTClArr->Delete();
 216     i3Prong = aodCharm3ProngTClArr->GetEntriesFast();
 217   }
 218   if(f4Prong) {
 219     aodCharm4ProngTClArr->Delete();
 220     i4Prong = aodCharm4ProngTClArr->GetEntriesFast();
 221   }
 222   if(fDstar) {
 223     aodDstarTClArr->Delete();
 224     iDstar = aodDstarTClArr->GetEntriesFast();
 225   }
 226   if(fLikeSign)   {
 227     aodLikeSignTClArr->Delete();
 228     iLikeSign = aodLikeSignTClArr->GetEntriesFast();
 229   }
 230   TClonesArray &aodD0toKpiRef      = *aodD0toKpiTClArr;
 231   TClonesArray &aodJPSItoEleRef    = *aodJPSItoEleTClArr;
 232   TClonesArray &aodCharm3ProngRef  = *aodCharm3ProngTClArr;
 233   TClonesArray &aodCharm4ProngRef  = *aodCharm4ProngTClArr;
 234   TClonesArray &aodDstarRef        = *aodDstarTClArr;
 235   TClonesArray &aodLikeSignRef     = *aodLikeSignTClArr;
 236
 237
 238   AliAODRecoDecayHF2Prong *io2Prong  = 0;
 239   AliAODRecoDecayHF3Prong *io3Prong  = 0;
 240   AliAODRecoDecayHF4Prong *io4Prong  = 0;
 241   AliAODRecoCascadeHF     *ioCascade = 0;
 242
 243   Int_t    iTrkP1,iTrkP2,iTrkN1,iTrkN2,iTrkSoftPi,trkEntries;
 244   Double_t xdummy,ydummy,dcap1n1,dcap1n2,dcap2n1,dcap1p2,dcan1n2,dcap2n2,dcaCasc;
 245   Bool_t   okD0=kFALSE,okJPSI=kFALSE,ok3Prong=kFALSE,ok4Prong=kFALSE;
 246   Bool_t   okDstar=kFALSE,okD0fromDstar=kFALSE;
 247   AliESDtrack *postrack1 = 0;
 248   AliESDtrack *postrack2 = 0;
 249   AliESDtrack *negtrack1 = 0;
 250   AliESDtrack *negtrack2 = 0;
 251   AliESDtrack *trackPi   = 0;
 252   Double_t dcaMax = fD0toKpiCuts[1];
 253   if(dcaMax < fBtoJPSICuts[1]) dcaMax=fBtoJPSICuts[1];
 254   if(dcaMax < fDplusCuts[11])  dcaMax=fDplusCuts[11];
 255   if(dcaMax < fD0to4ProngsCuts[1])  dcaMax=fD0to4ProngsCuts[1];
 256   AliDebug(2,Form(" dca cut set to %f cm",dcaMax));
 257
 258
 259   // get Bz
 260   fBzkG = (Double_t)event->GetMagneticField();
 261
 262   trkEntries = (Int_t)event->GetNumberOfTracks();
 263   AliDebug(1,Form(" Number of tracks: %d",trkEntries));
 264
 265   if(trkEntries<2) {
 266     AliDebug(1,Form(" Not enough tracks: %d",trkEntries));
 267     return;
 268   }
 269
 270   const AliVVertex *primary = event->GetPrimaryVertex();
 271   if(!primary) {
 272     AliDebug(1," No primary vertex from tracks");
 273     return;
 274   }
 275   TString primTitle = primary->GetTitle();
 276   if(!primTitle.Contains("VertexerTracks") ||
 277      primary->GetNContributors()<=0) {
 278     AliDebug(1," No primary vertex from tracks");
 279     return;
 280   }
 281
 282   // call function that applies sigle-track selection,
 283   // for displaced tracks and soft pions (both charges) for D*,
 284   // and retrieves primary vertex
 285   TObjArray seleTrksArray(trkEntries);
 286   UChar_t  *seleFlags = new UChar_t[trkEntries]; // bit 0: displaced, bit 1: softpi
 287   Int_t     nSeleTrks=0;
 288   SelectTracksAndCopyVertex(event,seleTrksArray,nSeleTrks,seleFlags);
 289
 290   AliDebug(1,Form(" Selected tracks: %d",nSeleTrks));
 291
 292   TObjArray *twoTrackArray1    = new TObjArray(2);
 293   TObjArray *twoTrackArray2    = new TObjArray(2);
 294   TObjArray *twoTrackArrayCasc = new TObjArray(2);
 295   TObjArray *threeTrackArray   = new TObjArray(3);
 296   TObjArray *fourTrackArray    = new TObjArray(4);
 297
 298   Double_t dispersion;
 299   Bool_t isLikeSignPair=kFALSE;
 300
 301   AliAODRecoDecayHF   *rd = 0;
 302   AliAODRecoCascadeHF *rc = 0;
 303
 304   // LOOP ON  POSITIVE  TRACKS
 305   for(iTrkP1=0; iTrkP1<nSeleTrks; iTrkP1++) {
 306
 307     if(iTrkP1%1==0) AliDebug(1,Form("  1st loop on pos: track number %d of %d",iTrkP1,nSeleTrks));
 308
 309     // get track from tracks array
 310     postrack1 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkP1);
 311
 312     if(!TESTBIT(seleFlags[iTrkP1],kBitDispl)) continue;
 313
 314     if(postrack1->Charge()<0 && !fLikeSign) continue;
 315
 316     // LOOP ON  NEGATIVE  TRACKS
 317     for(iTrkN1=0; iTrkN1<nSeleTrks; iTrkN1++) {
 318
 319       if(iTrkN1%1==0) AliDebug(1,Form("    1st loop on neg: track number %d of %d",iTrkN1,nSeleTrks));
 320
 321       if(iTrkN1==iTrkP1) continue;
 322
 323       // get track from tracks array
 324       negtrack1 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkN1);
 325
 326       if(negtrack1->Charge()>0 && !fLikeSign) continue;
 327
 328       if(!TESTBIT(seleFlags[iTrkN1],kBitDispl)) continue;
 329
 330       if(postrack1->Charge()==negtrack1->Charge()) { // like-sign
 331         isLikeSignPair=kTRUE;
 332         if(!fLikeSign)    continue;
 333         if(iTrkN1<iTrkP1) continue; // this is needed to avoid double-counting of like-sign
 334       } else { // unlike-sign
 335         isLikeSignPair=kFALSE;
 336         if(postrack1->Charge()<0 || negtrack1->Charge()>0) continue;  // this is needed to avoid double-counting of unlike-sign
 337       }
 338
 339       // back to primary vertex
 340       postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 341       negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 342
 343       // DCA between the two tracks
 344       dcap1n1 = postrack1->GetDCA(negtrack1,fBzkG,xdummy,ydummy);
 345       if(dcap1n1>dcaMax) { negtrack1=0; continue; }
 346
 347       // Vertexing
 348       twoTrackArray1->AddAt(postrack1,0);
 349       twoTrackArray1->AddAt(negtrack1,1);
 350       AliAODVertex *vertexp1n1 = ReconstructSecondaryVertex(twoTrackArray1,dispersion);
 351       if(!vertexp1n1) {
 352         twoTrackArray1->Clear();
 353         negtrack1=0;
 354         continue;
 355       }
 356
 357       // 2 prong candidate
 358       if(fD0toKpi || fJPSItoEle || fDstar || fLikeSign) {
 359
 360         io2Prong = Make2Prong(twoTrackArray1,event,vertexp1n1,dcap1n1,okD0,okJPSI,okD0fromDstar);
 361
 362         if((fD0toKpi && okD0) || (fJPSItoEle && okJPSI) || (isLikeSignPair && (okD0 || okJPSI))) {
 363           // add the vertex and the decay to the AOD
 364           AliAODVertex *v2Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*vertexp1n1);
 365           if(fInputAOD) AddDaughterRefs(v2Prong,event,twoTrackArray1);
 366           if(!isLikeSignPair) {
 367             if(okD0) {
 368               rd = new(aodD0toKpiRef[iD0toKpi++])AliAODRecoDecayHF2Prong(*io2Prong);
 369               rd->SetSecondaryVtx(v2Prong);
 370               v2Prong->SetParent(rd);
 371             }
 372             if(okJPSI) {
 373               rd = new(aodJPSItoEleRef[iJPSItoEle++])AliAODRecoDecayHF2Prong(*io2Prong);
 374               rd->SetSecondaryVtx(v2Prong);
 375               if(!okD0) v2Prong->SetParent(rd); // it cannot have two mothers ...
 376             }
 377           } else { // isLikeSignPair
 378             rd = new(aodLikeSignRef[iLikeSign++])AliAODRecoDecayHF2Prong(*io2Prong);
 379             rd->SetSecondaryVtx(v2Prong);
 380             v2Prong->SetParent(rd);
 381           }
 382         }
 383         // D* candidates
 384         if(fDstar && okD0fromDstar && !isLikeSignPair) {
 385           // write references in io2Prong
 386           if(fInputAOD) {
 387             AddDaughterRefs(vertexp1n1,event,twoTrackArray1);
 388           } else {
 389             vertexp1n1->AddDaughter(postrack1);
 390             vertexp1n1->AddDaughter(negtrack1);
 391           }
 392           io2Prong->SetSecondaryVtx(vertexp1n1);
 393           //printf("--->  %d %d %d %d %d\n",vertexp1n1->GetNDaughters(),iTrkP1,iTrkN1,postrack1->Charge(),negtrack1->Charge());
 394           // create a track from the D0
 395           AliNeutralTrackParam *trackD0 = new AliNeutralTrackParam(io2Prong);
 396
 397           // LOOP ON TRACKS THAT PASSED THE SOFT PION CUTS
 398           for(iTrkSoftPi=0; iTrkSoftPi<nSeleTrks; iTrkSoftPi++) {
 399
 400             if(iTrkSoftPi==iTrkP1 || iTrkSoftPi==iTrkN1) continue;
 401
 402             if(!TESTBIT(seleFlags[iTrkSoftPi],kBitSoftPi)) continue;
 403
 404             if(iTrkSoftPi%1==0) AliDebug(1,Form("    1st loop on pi_s: track number %d of %d",iTrkSoftPi,nSeleTrks));
 405
 406             trackD0->PropagateToDCA(fV1,fBzkG,kVeryBig);
 407             if(trackD0->GetSigmaY2()<0. || trackD0->GetSigmaZ2()<0.) continue; // this is insipired by the AliITStrackV2::Invariant() checks
 408
 409             // get track from tracks array
 410             trackPi = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkSoftPi);
 411             trackPi->PropagateToDCA(fV1,fBzkG,kVeryBig);
 412
 413             twoTrackArrayCasc->AddAt(trackPi,0);
 414             twoTrackArrayCasc->AddAt(trackD0,1);
 415
 416             AliAODVertex *vertexCasc = 0;
 417
 418             if(fFindVertexForDstar) {
 419               // DCA between the two tracks
 420               dcaCasc = trackPi->GetDCA(trackD0,fBzkG,xdummy,ydummy);
 421               // Vertexing
 422               vertexCasc = ReconstructSecondaryVertex(twoTrackArrayCasc,dispersion,kFALSE);
 423             } else {
 424               // assume Dstar decays at the primary vertex
 425               Double_t pos[3],cov[6],chi2perNDF;
 426               fV1->GetXYZ(pos);
 427               fV1->GetCovMatrix(cov);
 428               chi2perNDF = fV1->GetChi2toNDF();
 429               vertexCasc = new AliAODVertex(pos,cov,chi2perNDF,0x0,-1,AliAODVertex::kUndef,2);
 430               dcaCasc = 0.;
 431             }
 432             if(!vertexCasc) {
 433               twoTrackArrayCasc->Clear();
 434               trackPi=0;
 435               continue;
 436             }
 437
 438             ioCascade = MakeCascade(twoTrackArrayCasc,event,vertexCasc,io2Prong,dcaCasc,okDstar);
 439             if(okDstar) {
 440               // add the D0 to the AOD (if not already done)
 441               if(!okD0) {
 442                 AliAODVertex *v2Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*vertexp1n1);
 443                 if(fInputAOD) AddDaughterRefs(v2Prong,event,twoTrackArray1);
 444                 rd = new(aodD0toKpiRef[iD0toKpi++])AliAODRecoDecayHF2Prong(*io2Prong);
 445                 rd->SetSecondaryVtx(v2Prong);
 446                 v2Prong->SetParent(rd);
 447                 okD0=kTRUE; // this is done to add it only once
 448               }
 449               // add the vertex and the cascade to the AOD
 450               AliAODVertex *vCasc = new(verticesHFRef[iVerticesHF++])AliAODVertex(*vertexCasc);
 451               if(fInputAOD) {
 452                 AddDaughterRefs(vCasc,event,twoTrackArrayCasc); // add the pion
 453               } else {
 454                 vCasc->AddDaughter(rd); // just to fill ref #0
 455               }
 456               vCasc->AddDaughter(rd); // add the D0 (in ref #1)
 457               rc = new(aodDstarRef[iDstar++])AliAODRecoCascadeHF(*ioCascade);
 458               rc->SetSecondaryVtx(vCasc);
 459               vCasc->SetParent(rc);
 460             }
 461             twoTrackArrayCasc->Clear();
 462             trackPi=0;
 463             delete ioCascade; ioCascade=NULL;
 464             delete vertexCasc; vertexCasc=NULL;
 465           } // end loop on soft pi tracks
 466
 467           if(trackD0) {delete trackD0; trackD0=NULL;}
 468
 469         }
 470
 471         delete io2Prong; io2Prong=NULL;
 472       }
 473
 474       twoTrackArray1->Clear();
 475       if((!f3Prong && !f4Prong) || isLikeSignPair)  {
 476         negtrack1=0;
 477         delete vertexp1n1;
 478         continue;
 479       }
 480
 481
 482       // 2nd LOOP  ON  POSITIVE  TRACKS
 483       for(iTrkP2=iTrkP1+1; iTrkP2<nSeleTrks; iTrkP2++) {
 484
 485         if(iTrkP2==iTrkP1 || iTrkP2==iTrkN1) continue;
 486
 487         if(iTrkP2%1==0) AliDebug(1,Form("    2nd loop on pos: track number %d of %d",iTrkP2,nSeleTrks));
 488
 489         // get track from tracks array
 490         postrack2 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkP2);
 491
 492         if(postrack2->Charge()<0) continue;
 493
 494         if(!TESTBIT(seleFlags[iTrkP2],kBitDispl)) continue;
 495
 496         // back to primary vertex
 497         postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 498         postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 499         negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 500         //printf("********** %d %d %d\n",postrack1->GetID(),postrack2->GetID(),negtrack1->GetID());
 501
 502         dcap2n1 = postrack2->GetDCA(negtrack1,fBzkG,xdummy,ydummy);
 503         if(dcap2n1>dcaMax) { postrack2=0; continue; }
 504         dcap1p2 = postrack2->GetDCA(postrack1,fBzkG,xdummy,ydummy);
 505         if(dcap1p2>dcaMax) { postrack2=0; continue; }
 506
 507         // Vertexing
 508         twoTrackArray2->AddAt(postrack2,0);
 509         twoTrackArray2->AddAt(negtrack1,1);
 510         AliAODVertex *vertexp2n1 = ReconstructSecondaryVertex(twoTrackArray2,dispersion);
 511         if(!vertexp2n1) {
 512           twoTrackArray2->Clear();
 513           postrack2=0;
 514           continue;
 515         }
 516
 517         // 3 prong candidates
 518         if(f3Prong) {
 519
 520           threeTrackArray->AddAt(postrack1,0);
 521           threeTrackArray->AddAt(negtrack1,1);
 522           threeTrackArray->AddAt(postrack2,2);
 523
 524           AliAODVertex* secVert3PrAOD = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 525           io3Prong = Make3Prong(threeTrackArray,event,secVert3PrAOD,dispersion,vertexp1n1,vertexp2n1,dcap1n1,dcap2n1,dcap1p2,ok3Prong);
 526           if(ok3Prong) {
 527             AliAODVertex *v3Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert3PrAOD);
 528             if(fInputAOD) AddDaughterRefs(v3Prong,event,threeTrackArray);
 529             rd = new(aodCharm3ProngRef[i3Prong++])AliAODRecoDecayHF3Prong(*io3Prong);
 530             rd->SetSecondaryVtx(v3Prong);
 531             v3Prong->SetParent(rd);
 532           }
 533           if(io3Prong) {delete io3Prong; io3Prong=NULL;}
 534           if(secVert3PrAOD) {delete secVert3PrAOD; secVert3PrAOD=NULL;}
 535         }
 536
 537         // 4 prong candidates
 538         if(f4Prong) {
 539
 540           // back to primary vertex
 541           postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 542           postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 543           negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 544           // Vertexing for these 3 (can be taken from above?)
 545           threeTrackArray->AddAt(postrack1,0);
 546           threeTrackArray->AddAt(negtrack1,1);
 547           threeTrackArray->AddAt(postrack2,2);
 548           AliAODVertex* vertexp1n1p2 = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 549
 550           // 3rd LOOP  ON  NEGATIVE  TRACKS (for 4 prong)
 551           for(iTrkN2=iTrkN1+1; iTrkN2<nSeleTrks; iTrkN2++) {
 552
 553             if(iTrkN2==iTrkP1 || iTrkN2==iTrkP2 || iTrkN2==iTrkN1) continue;
 554
 555             if(iTrkN2%1==0) AliDebug(1,Form("    3rd loop on neg: track number %d of %d",iTrkN2,nSeleTrks));
 556
 557             // get track from tracks array
 558             negtrack2 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkN2);
 559
 560             if(negtrack2->Charge()>0) continue;
 561
 562             if(!TESTBIT(seleFlags[iTrkN2],kBitDispl)) continue;
 563
 564             // back to primary vertex
 565             postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 566             postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 567             negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 568             negtrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 569             dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 570             if(dcap1n2>dcaMax) { negtrack2=0; continue; }
 571             dcap2n2 = postrack2->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 572             if(dcap2n2>dcaMax) { negtrack2=0; continue; }
 573
 574             // Vertexing
 575             fourTrackArray->AddAt(postrack1,0);
 576             fourTrackArray->AddAt(negtrack1,1);
 577             fourTrackArray->AddAt(postrack2,2);
 578             fourTrackArray->AddAt(negtrack2,3);
 579
 580             AliAODVertex* secVert4PrAOD = ReconstructSecondaryVertex(fourTrackArray,dispersion);
 581             io4Prong = Make4Prong(fourTrackArray,event,secVert4PrAOD,vertexp1n1,vertexp1n1p2,dcap1n1,dcap1n2,dcap2n1,dcap2n2,ok4Prong);
 582             if(ok4Prong) {
 583               AliAODVertex *v4Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert4PrAOD);
 584               if(fInputAOD) AddDaughterRefs(v4Prong,event,fourTrackArray);
 585               rd = new(aodCharm4ProngRef[i4Prong++])AliAODRecoDecayHF4Prong(*io4Prong);
 586               rd->SetSecondaryVtx(v4Prong);
 587               v4Prong->SetParent(rd);
 588             }
 589
 590             if(io4Prong) {delete io4Prong; io4Prong=NULL;}
 591             if(secVert4PrAOD) {delete secVert4PrAOD; secVert4PrAOD=NULL;}
 592             fourTrackArray->Clear();
 593             negtrack2 = 0;
 594
 595           } // end loop on negative tracks
 596
 597           threeTrackArray->Clear();
 598           delete vertexp1n1p2;
 599
 600         }
 601
 602         postrack2 = 0;
 603         delete vertexp2n1;
 604
 605       } // end 2nd loop on positive tracks
 606
 607       twoTrackArray2->Clear();
 608
 609       // 2nd LOOP  ON  NEGATIVE  TRACKS (for 3 prong +--)
 610       for(iTrkN2=iTrkN1+1; iTrkN2<nSeleTrks; iTrkN2++) {
 611
 612         if(iTrkN2==iTrkP1 || iTrkN2==iTrkP2 || iTrkN2==iTrkN1) continue;
 613
 614         if(iTrkN2%1==0) AliDebug(1,Form("    2nd loop on neg: track number %d of %d",iTrkN2,nSeleTrks));
 615
 616         // get track from tracks array
 617         negtrack2 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkN2);
 618
 619         if(negtrack2->Charge()>0) continue;
 620
 621         if(!TESTBIT(seleFlags[iTrkN2],kBitDispl)) continue;
 622
 623         // back to primary vertex
 624         postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 625         negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 626         negtrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 627         //printf("********** %d %d %d\n",postrack1->GetID(),negtrack1->GetID(),negtrack2->GetID());
 628
 629         dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 630         if(dcap1n2>dcaMax) { negtrack2=0; continue; }
 631         dcan1n2 = negtrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 632         if(dcan1n2>dcaMax) { negtrack2=0; continue; }
 633
 634         // Vertexing
 635         twoTrackArray2->AddAt(postrack1,0);
 636         twoTrackArray2->AddAt(negtrack2,1);
 637
 638         AliAODVertex *vertexp1n2 = ReconstructSecondaryVertex(twoTrackArray2,dispersion);
 639         if(!vertexp1n2) {
 640           twoTrackArray2->Clear();
 641           negtrack2=0;
 642           continue;
 643         }
 644
 645         if(f3Prong) {
 646           threeTrackArray->AddAt(negtrack1,0);
 647           threeTrackArray->AddAt(postrack1,1);
 648           threeTrackArray->AddAt(negtrack2,2);
 649           AliAODVertex* secVert3PrAOD = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 650           io3Prong = Make3Prong(threeTrackArray,event,secVert3PrAOD,dispersion,vertexp1n1,vertexp1n2,dcap1n1,dcap1n2,dcan1n2,ok3Prong);
 651           if(ok3Prong) {
 652             AliAODVertex *v3Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert3PrAOD);
 653             if(fInputAOD) AddDaughterRefs(v3Prong,event,threeTrackArray);
 654             rd = new(aodCharm3ProngRef[i3Prong++])AliAODRecoDecayHF3Prong(*io3Prong);
 655             rd->SetSecondaryVtx(v3Prong);
 656             v3Prong->SetParent(rd);
 657           }
 658           if(io3Prong) {delete io3Prong; io3Prong=NULL;}
 659           if(secVert3PrAOD) {delete secVert3PrAOD; secVert3PrAOD=NULL;}
 660         }
 661
 662         negtrack2 = 0;
 663         delete vertexp1n2;
 664
 665       } // end 2nd loop on negative tracks
 666       twoTrackArray2->Clear();
 667
 668       negtrack1 = 0;
 669       delete vertexp1n1;
 670     } // end 1st loop on negative tracks
 671
 672     postrack1 = 0;
 673   }  // end 1st loop on positive tracks
 674
 675
 676   AliDebug(1,Form(" Total HF vertices in event = %d;",
 677                   (Int_t)aodVerticesHFTClArr->GetEntriesFast()));
 678   if(fD0toKpi) {
 679     AliDebug(1,Form(" D0->Kpi in event = %d;",
 680                     (Int_t)aodD0toKpiTClArr->GetEntriesFast()));
 681   }
 682   if(fJPSItoEle) {
 683     AliDebug(1,Form(" JPSI->ee in event = %d;",
 684                     (Int_t)aodJPSItoEleTClArr->GetEntriesFast()));
 685   }
 686   if(f3Prong) {
 687     AliDebug(1,Form(" Charm->3Prong in event = %d;",
 688                     (Int_t)aodCharm3ProngTClArr->GetEntriesFast()));
 689   }
 690   if(f4Prong) {
 691     AliDebug(1,Form(" Charm->4Prong in event = %d;\n",
 692                     (Int_t)aodCharm4ProngTClArr->GetEntriesFast()));
 693   }
 694   if(fDstar) {
 695     AliDebug(1,Form(" D*->D0pi in event = %d;\n",
 696                     (Int_t)aodDstarTClArr->GetEntriesFast()));
 697   }
 698   if(fLikeSign) {
 699     AliDebug(1,Form(" Like-sign pairs in event = %d;\n",
 700                     (Int_t)aodLikeSignTClArr->GetEntriesFast()));
 701   }
 702
 703
 704   twoTrackArray1->Delete();  delete twoTrackArray1;
 705   twoTrackArray2->Delete();  delete twoTrackArray2;
 706   twoTrackArrayCasc->Delete();  delete twoTrackArrayCasc;
 707   threeTrackArray->Clear();
 708   threeTrackArray->Delete(); delete threeTrackArray;
 709   fourTrackArray->Delete();  delete fourTrackArray;
 710   delete [] seleFlags; seleFlags=NULL;
 711
 712   if(fInputAOD) {
 713     seleTrksArray.Delete();
 714     if(fAODMap) { delete [] fAODMap; fAODMap=NULL; }
 715   }
 716
 717   return;
 718 }
 719 //----------------------------------------------------------------------------
 720 void AliAnalysisVertexingHF::AddDaughterRefs(AliAODVertex *v,AliVEvent *event,
 721                                              TObjArray *trkArray) const
 722 {
 723   // Add the AOD tracks as daughters of the vertex (TRef)
 724
 725   Int_t nTrks = trkArray->GetEntriesFast();
 726
 727   AliExternalTrackParam *track = 0;
 728   AliAODTrack *aodTrack = 0;
 729   Int_t id;
 730
 731   for(Int_t i=0; i<nTrks; i++) {
 732     track = (AliExternalTrackParam*)trkArray->UncheckedAt(i);
 733     id = (Int_t)track->GetID();
 734     //printf("---> %d\n",id);
 735     if(id<0) continue; // this track is a AliAODRecoDecay
 736     aodTrack = (AliAODTrack*)event->GetTrack(fAODMap[id]);
 737     v->AddDaughter(aodTrack);
 738   }
 739
 740   return;
 741 }
 742 //----------------------------------------------------------------------------
 743 AliAODRecoCascadeHF* AliAnalysisVertexingHF::MakeCascade(
 744                                    TObjArray *twoTrackArray,AliVEvent *event,
 745                                    AliAODVertex *secVert,
 746                                    AliAODRecoDecayHF2Prong *rd2Prong,
 747                                    Double_t dca,
 748                                    Bool_t &okDstar) const
 749 {
 750   // Make the cascade as a 2Prong decay and check if it passes Dstar
 751   // reconstruction cuts
 752
 753   okDstar = kFALSE;
 754
 755   Bool_t dummy1,dummy2,dummy3;
 756
 757   // We use Make2Prong to construct the AliAODRecoCascadeHF
 758   // (which inherits from AliAODRecoDecayHF2Prong)
 759   AliAODRecoCascadeHF *theCascade =
 760     (AliAODRecoCascadeHF*)Make2Prong(twoTrackArray,event,secVert,dca,
 761                                      dummy1,dummy2,dummy3);
 762   if(!theCascade) return 0x0;
 763
 764   // charge
 765   AliESDtrack *trackPi = (AliESDtrack*)twoTrackArray->UncheckedAt(0);
 766   theCascade->SetCharge(trackPi->Charge());
 767
 768   //--- selection cuts
 769   //
 770   AliAODRecoCascadeHF *tmpCascade = new AliAODRecoCascadeHF(*theCascade);
 771   tmpCascade->GetSecondaryVtx()->AddDaughter(trackPi);
 772   tmpCascade->GetSecondaryVtx()->AddDaughter(rd2Prong);
 773   AliAODVertex *primVertexAOD=0;
 774   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
 775     // take event primary vertex
 776     primVertexAOD = PrimaryVertex();
 777     tmpCascade->SetOwnPrimaryVtx(primVertexAOD);
 778     rd2Prong->SetOwnPrimaryVtx(primVertexAOD);
 779   }
 780   // select D*->D0pi
 781   if(fDstar) {
 782     Bool_t testD0=kTRUE;
 783     okDstar = tmpCascade->SelectDstar(fDstarCuts,fD0fromDstarCuts,testD0);
 784   }
 785   tmpCascade->GetSecondaryVtx()->RemoveDaughters();
 786   tmpCascade->UnsetOwnPrimaryVtx();
 787   delete tmpCascade; tmpCascade=NULL;
 788   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
 789     rd2Prong->UnsetOwnPrimaryVtx();
 790   }
 791   if(primVertexAOD) {delete primVertexAOD; primVertexAOD=NULL;}
 792   //---
 793
 794   return theCascade;
 795 }
 796 //-----------------------------------------------------------------------------
 797 AliAODRecoDecayHF2Prong *AliAnalysisVertexingHF::Make2Prong(
 798                                    TObjArray *twoTrackArray,AliVEvent *event,
 799                                    AliAODVertex *secVert,Double_t dca,
 800                                    Bool_t &okD0,Bool_t &okJPSI,
 801                                    Bool_t &okD0fromDstar) const
 802 {
 803   // Make 2Prong candidates and check if they pass D0toKpi or BtoJPSI
 804   // reconstruction cuts
 805   // G.E.Bruno (J/psi), A.Dainese (D0->Kpi)
 806
 807   okD0=kFALSE; okJPSI=kFALSE; okD0fromDstar=kFALSE;
 808
 809   Double_t px[2],py[2],pz[2],d0[2],d0err[2];
 810
 811   AliESDtrack *postrack = (AliESDtrack*)twoTrackArray->UncheckedAt(0);
 812   AliESDtrack *negtrack = (AliESDtrack*)twoTrackArray->UncheckedAt(1);
 813
 814   // propagate tracks to secondary vertex, to compute inv. mass
 815   postrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 816   negtrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 817
 818   Double_t momentum[3];
 819   postrack->GetPxPyPz(momentum);
 820   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
 821   negtrack->GetPxPyPz(momentum);
 822   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
 823
 824
 825   // invariant mass cut (try to improve coding here..)
 826   Bool_t okMassCut=kFALSE;
 827   if(!okMassCut && fD0toKpi)   if(SelectInvMass(0,2,px,py,pz)) okMassCut=kTRUE;
 828   if(!okMassCut && fJPSItoEle) if(SelectInvMass(1,2,px,py,pz)) okMassCut=kTRUE;
 829   if(!okMassCut && fDstar)     if(SelectInvMass(3,2,px,py,pz)) okMassCut=kTRUE;
 830   if(!okMassCut) {
 831     AliDebug(2," candidate didn't pass mass cut");
 832     return 0x0;
 833   }
 834
 835   // primary vertex to be used by this candidate
 836   AliAODVertex *primVertexAOD  = PrimaryVertex(twoTrackArray,event);
 837   if(!primVertexAOD) return 0x0;
 838
 839   Double_t d0z0[2],covd0z0[3];
 840   postrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 841   d0[0] = d0z0[0];
 842   d0err[0] = TMath::Sqrt(covd0z0[0]);
 843   negtrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 844   d0[1] = d0z0[0];
 845   d0err[1] = TMath::Sqrt(covd0z0[0]);
 846
 847   // create the object AliAODRecoDecayHF2Prong
 848   AliAODRecoDecayHF2Prong *the2Prong = new AliAODRecoDecayHF2Prong(secVert,px,py,pz,d0,d0err,dca);
 849   the2Prong->SetOwnPrimaryVtx(primVertexAOD);
 850   UShort_t id[2]={(UShort_t)postrack->GetID(),(UShort_t)negtrack->GetID()};
 851   the2Prong->SetProngIDs(2,id);
 852
 853
 854   // select D0->Kpi
 855   Int_t checkD0,checkD0bar;
 856   if(fD0toKpi)   okD0          = the2Prong->SelectD0(fD0toKpiCuts,checkD0,checkD0bar);
 857   //if(fDebug && fD0toKpi) printf("   %d\n",(Int_t)okD0);
 858   // select J/psi from B
 859   Int_t checkJPSI;
 860   if(fJPSItoEle) okJPSI        = the2Prong->SelectBtoJPSI(fBtoJPSICuts,checkJPSI);
 861   //if(fDebug && fJPSItoEle) printf("   %d\n",(Int_t)okJPSI);
 862   // select D0->Kpi from Dstar
 863   if(fDstar)     okD0fromDstar = the2Prong->SelectD0(fD0fromDstarCuts,checkD0,checkD0bar);
 864   //if(fDebug && fDstar) printf("   %d\n",(Int_t)okD0fromDstar);
 865
 866   // remove the primary vertex (was used only for selection)
 867   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
 868     the2Prong->UnsetOwnPrimaryVtx();
 869     delete primVertexAOD; primVertexAOD=NULL;
 870   }
 871
 872   // get PID info from ESD
 873   Double_t esdpid0[5]={0.,0.,0.,0.,0.};
 874   if(postrack->GetStatus()&AliESDtrack::kESDpid) postrack->GetESDpid(esdpid0);
 875   Double_t esdpid1[5]={0.,0.,0.,0.,0.};
 876   if(negtrack->GetStatus()&AliESDtrack::kESDpid) negtrack->GetESDpid(esdpid1);
 877   Double_t esdpid[10];
 878   for(Int_t i=0;i<5;i++) {
 879     esdpid[i]   = esdpid0[i];
 880     esdpid[5+i] = esdpid1[i];
 881   }
 882   the2Prong->SetPID(2,esdpid);
 883
 884   return the2Prong;
 885 }
 886 //----------------------------------------------------------------------------
 887 AliAODRecoDecayHF3Prong* AliAnalysisVertexingHF::Make3Prong(
 888                              TObjArray *threeTrackArray,AliVEvent *event,
 889                              AliAODVertex *secVert,Double_t dispersion,
 890                              AliAODVertex *vertexp1n1,AliAODVertex *vertexp2n1,
 891                              Double_t dcap1n1,Double_t dcap2n1,Double_t dcap1p2,
 892                              Bool_t &ok3Prong) const
 893 {
 894   // Make 3Prong candidates and check if they pass Dplus or Ds or Lambdac
 895   // reconstruction cuts
 896   // E.Bruna, F.Prino
 897
 898
 899   ok3Prong=kFALSE;
 900   if(!secVert) return 0x0;
 901
 902   Double_t px[3],py[3],pz[3],d0[3],d0err[3];
 903   Double_t momentum[3];
 904
 905
 906   AliESDtrack *postrack1 = (AliESDtrack*)threeTrackArray->UncheckedAt(0);
 907   AliESDtrack *negtrack  = (AliESDtrack*)threeTrackArray->UncheckedAt(1);
 908   AliESDtrack *postrack2 = (AliESDtrack*)threeTrackArray->UncheckedAt(2);
 909
 910   postrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
 911   negtrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 912   postrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
 913   postrack1->GetPxPyPz(momentum);
 914   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
 915   negtrack->GetPxPyPz(momentum);
 916   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
 917   postrack2->GetPxPyPz(momentum);
 918   px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
 919
 920   // invariant mass cut for D+, Ds, Lc
 921   Bool_t okMassCut=kFALSE;
 922   if(!okMassCut && f3Prong) if(SelectInvMass(2,3,px,py,pz)) okMassCut=kTRUE;
 923   if(!okMassCut) {
 924     AliDebug(2," candidate didn't pass mass cut");
 925     return 0x0;
 926   }
 927
 928   // primary vertex to be used by this candidate
 929   AliAODVertex *primVertexAOD  = PrimaryVertex(threeTrackArray,event);
 930   if(!primVertexAOD) return 0x0;
 931
 932   Double_t d0z0[2],covd0z0[3];
 933   postrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 934   d0[0]=d0z0[0];
 935   d0err[0] = TMath::Sqrt(covd0z0[0]);
 936   negtrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 937   d0[1]=d0z0[0];
 938   d0err[1] = TMath::Sqrt(covd0z0[0]);
 939   postrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 940   d0[2]=d0z0[0];
 941   d0err[2] = TMath::Sqrt(covd0z0[0]);
 942
 943
 944   // create the object AliAODRecoDecayHF3Prong
 945   Double_t pos[3]; primVertexAOD->GetXYZ(pos);
 946   Double_t dca[3]={dcap1n1,dcap2n1,dcap1p2};
 947   Double_t dist12=TMath::Sqrt((vertexp1n1->GetX()-pos[0])*(vertexp1n1->GetX()-pos[0])+(vertexp1n1->GetY()-pos[1])*(vertexp1n1->GetY()-pos[1])+(vertexp1n1->GetZ()-pos[2])*(vertexp1n1->GetZ()-pos[2]));
 948   Double_t dist23=TMath::Sqrt((vertexp2n1->GetX()-pos[0])*(vertexp2n1->GetX()-pos[0])+(vertexp2n1->GetY()-pos[1])*(vertexp2n1->GetY()-pos[1])+(vertexp2n1->GetZ()-pos[2])*(vertexp2n1->GetZ()-pos[2]));
 949   Short_t charge=(Short_t)(postrack1->Charge()*postrack2->Charge()*negtrack->Charge());
 950   AliAODRecoDecayHF3Prong *the3Prong = new AliAODRecoDecayHF3Prong(secVert,px,py,pz,d0,d0err,dca,dispersion,dist12,dist23,charge);
 951   the3Prong->SetOwnPrimaryVtx(primVertexAOD);
 952   UShort_t id[3]={(UShort_t)postrack1->GetID(),(UShort_t)negtrack->GetID(),(UShort_t)postrack2->GetID()};
 953   the3Prong->SetProngIDs(3,id);
 954
 955
 956   // select D+->Kpipi, Ds->KKpi, Lc->pKpi
 957   if(f3Prong) {
 958     ok3Prong = kFALSE;
 959     Int_t ok1,ok2;
 960     if(the3Prong->SelectDplus(fDplusCuts))   ok3Prong = kTRUE;
 961     if(the3Prong->SelectDs(fDsCuts,ok1,ok2)) ok3Prong = kTRUE;
 962     if(the3Prong->SelectLc(fLcCuts,ok1,ok2)) ok3Prong = kTRUE;
 963   }
 964   //if(fDebug) printf("ok3Prong: %d\n",(Int_t)ok3Prong);
 965
 966   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
 967     the3Prong->UnsetOwnPrimaryVtx();
 968     delete primVertexAOD; primVertexAOD=NULL;
 969   }
 970
 971   // get PID info from ESD
 972   Double_t esdpid0[5]={0.,0.,0.,0.,0.};
 973   if(postrack1->GetStatus()&AliESDtrack::kESDpid) postrack1->GetESDpid(esdpid0);
 974   Double_t esdpid1[5]={0.,0.,0.,0.,0.};
 975   if(negtrack->GetStatus()&AliESDtrack::kESDpid) negtrack->GetESDpid(esdpid1);
 976   Double_t esdpid2[5]={0.,0.,0.,0.,0.};
 977   if(postrack2->GetStatus()&AliESDtrack::kESDpid) postrack2->GetESDpid(esdpid2);
 978
 979   Double_t esdpid[15];
 980   for(Int_t i=0;i<5;i++) {
 981     esdpid[i]    = esdpid0[i];
 982     esdpid[5+i]  = esdpid1[i];
 983     esdpid[10+i] = esdpid2[i];
 984   }
 985   the3Prong->SetPID(3,esdpid);
 986
 987   return the3Prong;
 988 }
 989 //----------------------------------------------------------------------------
 990 AliAODRecoDecayHF4Prong* AliAnalysisVertexingHF::Make4Prong(
 991                              TObjArray *fourTrackArray,AliVEvent *event,
 992                              AliAODVertex *secVert,
 993                              AliAODVertex *vertexp1n1,
 994                              AliAODVertex *vertexp1n1p2,
 995                              Double_t dcap1n1,Double_t dcap1n2,
 996                              Double_t dcap2n1,Double_t dcap2n2,
 997                              Bool_t &ok4Prong) const
 998 {
 999   // Make 4Prong candidates and check if they pass D0toKpipipi
1000   // reconstruction cuts
1001   // G.E.Bruno, R.Romita
1002
1003   ok4Prong=kFALSE;
1004   if(!secVert) return 0x0;
1005
1006   Double_t px[4],py[4],pz[4],d0[4],d0err[4];//d0z[3];
1007
1008   AliESDtrack *postrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(0);
1009   AliESDtrack *negtrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(1);
1010   AliESDtrack *postrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(2);
1011   AliESDtrack *negtrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(3);
1012
1013   postrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
1014   negtrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
1015   postrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
1016   negtrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
1017
1018   Double_t momentum[3];
1019   postrack1->GetPxPyPz(momentum);
1020   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
1021   negtrack1->GetPxPyPz(momentum);
1022   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
1023   postrack2->GetPxPyPz(momentum);
1024   px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
1025   negtrack2->GetPxPyPz(momentum);
1026   px[3] = momentum[0]; py[3] = momentum[1]; pz[3] = momentum[2];
1027
1028   // invariant mass cut for rho or D0 (try to improve coding here..)
1029   //Bool_t okMassCut=kFALSE;
1030   //if(!okMassCut) if(SelectInvMass(2,3,px,py,pz)) okMassCut=kTRUE;
1031   //if(!okMassCut) {
1032   //  if(fDebug) printf(" candidate didn't pass mass cut\n");
1033   //  return 0x0;
1034   // }
1035
1036   // primary vertex to be used by this candidate
1037   AliAODVertex *primVertexAOD  = PrimaryVertex(fourTrackArray,event);
1038   if(!primVertexAOD) return 0x0;
1039
1040   Double_t d0z0[2],covd0z0[3];
1041   postrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1042   d0[0]=d0z0[0];
1043   d0err[0] = TMath::Sqrt(covd0z0[0]);
1044   negtrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1045   d0[1]=d0z0[0];
1046   d0err[1] = TMath::Sqrt(covd0z0[0]);
1047   postrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1048   d0[2]=d0z0[0];
1049   d0err[2] = TMath::Sqrt(covd0z0[0]);
1050   negtrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1051   d0[3]=d0z0[0];
1052   d0err[3] = TMath::Sqrt(covd0z0[0]);
1053
1054
1055   // create the object AliAODRecoDecayHF4Prong
1056   Double_t pos[3]; primVertexAOD->GetXYZ(pos);
1057   Double_t dca[6]={dcap1n1,0.,dcap1n2,dcap2n1,0.,dcap2n2};
1058   Double_t dist12=TMath::Sqrt((vertexp1n1->GetX()-pos[0])*(vertexp1n1->GetX()-pos[0])+(vertexp1n1->GetY()-pos[1])*(vertexp1n1->GetY()-pos[1])+(vertexp1n1->GetZ()-pos[2])*(vertexp1n1->GetZ()-pos[2]));
1059   Double_t dist3=TMath::Sqrt((vertexp1n1p2->GetX()-pos[0])*(vertexp1n1p2->GetX()-pos[0])+(vertexp1n1p2->GetY()-pos[1])*(vertexp1n1p2->GetY()-pos[1])+(vertexp1n1p2->GetZ()-pos[2])*(vertexp1n1p2->GetZ()-pos[2]));
1060   Double_t dist4=TMath::Sqrt((secVert->GetX()-pos[0])*(secVert->GetX()-pos[0])+(secVert->GetY()-pos[1])*(secVert->GetY()-pos[1])+(secVert->GetZ()-pos[2])*(secVert->GetZ()-pos[2]));
1061   Short_t charge=0;
1062   AliAODRecoDecayHF4Prong *the4Prong = new AliAODRecoDecayHF4Prong(secVert,px,py,pz,d0,d0err,dca,dist12,dist3,dist4,charge);
1063   the4Prong->SetOwnPrimaryVtx(primVertexAOD);
1064   UShort_t id[4]={(UShort_t)postrack1->GetID(),(UShort_t)negtrack1->GetID(),(UShort_t)postrack2->GetID(),(UShort_t)negtrack2->GetID()};
1065   the4Prong->SetProngIDs(4,id);
1066
1067   // invariant mass cut for rho or D0 (try to improve coding here..)
1068   Bool_t okMassCut=kFALSE;
1069   if(!okMassCut && fD0to4ProngsCuts[8]==0.){      //no PID, to be implemented with PID
1070     if(SelectInvMass(4,4,px,py,pz)) okMassCut=kTRUE;
1071   }
1072   if(!okMassCut) {
1073     //if(fDebug) printf(" candidate didn't pass mass cut\n");
1074     //printf(" candidate didn't pass mass cut\n");
1075     return 0x0;
1076   }
1077
1078
1079   Int_t checkD0,checkD0bar;
1080   ok4Prong=the4Prong->SelectD0(fD0to4ProngsCuts,checkD0,checkD0bar);
1081
1082   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
1083     the4Prong->UnsetOwnPrimaryVtx();
1084     delete primVertexAOD; primVertexAOD=NULL;
1085   }
1086
1087
1088   // get PID info from ESD
1089   Double_t esdpid0[5]={0.,0.,0.,0.,0.};
1090   if(postrack1->GetStatus()&AliESDtrack::kESDpid) postrack1->GetESDpid(esdpid0);
1091   Double_t esdpid1[5]={0.,0.,0.,0.,0.};
1092   if(negtrack1->GetStatus()&AliESDtrack::kESDpid) negtrack1->GetESDpid(esdpid1);
1093   Double_t esdpid2[5]={0.,0.,0.,0.,0.};
1094   if(postrack2->GetStatus()&AliESDtrack::kESDpid) postrack2->GetESDpid(esdpid2);
1095   Double_t esdpid3[5]={0.,0.,0.,0.,0.};
1096   if(negtrack2->GetStatus()&AliESDtrack::kESDpid) negtrack2->GetESDpid(esdpid3);
1097
1098   Double_t esdpid[20];
1099   for(Int_t i=0;i<5;i++) {
1100     esdpid[i]    = esdpid0[i];
1101     esdpid[5+i]  = esdpid1[i];
1102     esdpid[10+i] = esdpid2[i];
1103     esdpid[15+i] = esdpid3[i];
1104   }
1105   the4Prong->SetPID(4,esdpid);
1106
1107   return the4Prong;
1108 }
1109 //-----------------------------------------------------------------------------
1110 AliAODVertex* AliAnalysisVertexingHF::PrimaryVertex(TObjArray *trkArray,
1111                                                     AliVEvent *event) const
1112 {
1113   // Returns primary vertex to be used for this candidate
1114
1115   AliESDVertex *vertexESD = 0;
1116   AliAODVertex *vertexAOD = 0;
1117
1118
1119   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
1120     // primary vertex from the input event
1121
1122     vertexESD = new AliESDVertex(*fV1);
1123
1124   } else {
1125     // primary vertex specific to this candidate
1126
1127     Int_t nTrks = trkArray->GetEntriesFast();
1128     AliVertexerTracks *vertexer = new AliVertexerTracks(event->GetMagneticField());
1129
1130     if(fRecoPrimVtxSkippingTrks) {
1131       // recalculating the vertex
1132
1133       if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraint")) {
1134         Float_t diamondcovxy[3];
1135         event->GetDiamondCovXY(diamondcovxy);
1136         Double_t pos[3]={event->GetDiamondX(),event->GetDiamondY(),0.};
1137         Double_t cov[6]={diamondcovxy[0],diamondcovxy[1],diamondcovxy[2],0.,0.,10.};
1138         AliESDVertex *diamond = new AliESDVertex(pos,cov,1.,1);
1139         vertexer->SetVtxStart(diamond);
1140         delete diamond; diamond=NULL;
1141         if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraintOnlyFitter"))
1142           vertexer->SetOnlyFitter();
1143       }
1144       Int_t skipped[10];
1145       Int_t nTrksToSkip=0,id;
1146       AliExternalTrackParam *t = 0;
1147       for(Int_t i=0; i<nTrks; i++) {
1148         t = (AliExternalTrackParam*)trkArray->UncheckedAt(i);
1149         id = (Int_t)t->GetID();
1150         if(id<0) continue;
1151         skipped[nTrksToSkip++] = id;
1152       }
1153       vertexer->SetSkipTracks(nTrksToSkip,skipped);
1154       vertexESD = (AliESDVertex*)vertexer->FindPrimaryVertex(event);
1155
1156     } else if(fRmTrksFromPrimVtx) {
1157       // removing the prongs tracks
1158
1159       TObjArray rmArray(nTrks);
1160       UShort_t *rmId = new UShort_t[nTrks];
1161       AliESDtrack *esdTrack = 0;
1162       AliESDtrack *t = 0;
1163       for(Int_t i=0; i<nTrks; i++) {
1164         t = (AliESDtrack*)trkArray->UncheckedAt(i);
1165         esdTrack = new AliESDtrack(*t);
1166         rmArray.AddLast(esdTrack);
1167         if(esdTrack->GetID()>=0) {
1168           rmId[i]=(UShort_t)esdTrack->GetID();
1169         } else {
1170           rmId[i]=9999;
1171         }
1172       }
1173       Float_t diamondxy[2]={event->GetDiamondX(),event->GetDiamondY()};
1174       vertexESD = vertexer->RemoveTracksFromVertex(fV1,&rmArray,rmId,diamondxy);
1175       delete [] rmId; rmId=NULL;
1176       rmArray.Delete();
1177
1178     }
1179
1180     if(!vertexESD) return vertexAOD;
1181     if(vertexESD->GetNContributors()<=0) {
1182       AliDebug(2,"vertexing failed");
1183       delete vertexESD; vertexESD=NULL;
1184       return vertexAOD;
1185     }
1186
1187     delete vertexer; vertexer=NULL;
1188
1189   }
1190
1191   // convert to AliAODVertex
1192   Double_t pos[3],cov[6],chi2perNDF;
1193   vertexESD->GetXYZ(pos); // position
1194   vertexESD->GetCovMatrix(cov); //covariance matrix
1195   chi2perNDF = vertexESD->GetChi2toNDF();
1196   delete vertexESD; vertexESD=NULL;
1197
1198   vertexAOD = new AliAODVertex(pos,cov,chi2perNDF);
1199
1200   return vertexAOD;
1201 }
1202 //-----------------------------------------------------------------------------
1203 void AliAnalysisVertexingHF::PrintStatus() const {
1204   // Print parameters being used
1205
1206   //printf("Preselections:\n");
1207   //   fTrackFilter->Dump();
1208   if(fSecVtxWithKF) {
1209     printf("Secondary vertex with Kalman filter package (AliKFParticle)\n");
1210   } else {
1211     printf("Secondary vertex with AliVertexerTracks\n");
1212   }
1213   if(fRecoPrimVtxSkippingTrks) printf("RecoPrimVtxSkippingTrks\n");
1214   if(fRmTrksFromPrimVtx) printf("RmTrksFromPrimVtx\n");
1215   if(fD0toKpi) {
1216     printf("Reconstruct D0->Kpi candidates with cuts:\n");
1217     printf("    |M-MD0| [GeV]    < %f\n",fD0toKpiCuts[0]);
1218     printf("    dca    [cm]  < %f\n",fD0toKpiCuts[1]);
1219     printf("    cosThetaStar     < %f\n",fD0toKpiCuts[2]);
1220     printf("    pTK     [GeV/c]    > %f\n",fD0toKpiCuts[3]);
1221     printf("    pTpi    [GeV/c]    > %f\n",fD0toKpiCuts[4]);
1222     printf("    |d0K|  [cm]  < %f\n",fD0toKpiCuts[5]);
1223     printf("    |d0pi| [cm]  < %f\n",fD0toKpiCuts[6]);
1224     printf("    d0d0  [cm^2] < %f\n",fD0toKpiCuts[7]);
1225     printf("    cosThetaPoint    > %f\n",fD0toKpiCuts[8]);
1226   }
1227   if(fDstar) {
1228     if(fFindVertexForDstar) {
1229       printf("    Reconstruct a secondary vertex for the D*\n");
1230     } else {
1231       printf("    Assume the D* comes from the primary vertex\n");
1232     }
1233     printf("    |M-MD*| [GeV]    < %f\n",fDstarCuts[0]);
1234     printf("    |M_Kpipi-M_Kpi-(MD*-MD0)| [GeV]  < %f\n",fDstarCuts[1]);
1235     printf("    pTpisoft [GeV/c]    > %f\n",fDstarCuts[2]);
1236     printf("    pTpisoft [GeV/c]    < %f\n",fDstarCuts[3]);
1237     printf("    Theta(pisoft,D0plane) < %f\n",fDstarCuts[4]);
1238     printf("Reconstruct D*->D0pi candidates with cuts:\n");
1239     printf("   D0 from D* cuts:\n");
1240     printf("    |M-MD0| [GeV]    < %f\n",fD0fromDstarCuts[0]);
1241     printf("    dca    [cm]  < %f\n",fD0fromDstarCuts[1]);
1242     printf("    cosThetaStar     < %f\n",fD0fromDstarCuts[2]);
1243     printf("    pTK     [GeV/c]    > %f\n",fD0fromDstarCuts[3]);
1244     printf("    pTpi    [GeV/c]    > %f\n",fD0fromDstarCuts[4]);
1245     printf("    |d0K|  [cm]  < %f\n",fD0fromDstarCuts[5]);
1246     printf("    |d0pi| [cm]  < %f\n",fD0fromDstarCuts[6]);
1247     printf("    d0d0  [cm^2] < %f\n",fD0fromDstarCuts[7]);
1248     printf("    cosThetaPoint    > %f\n",fD0fromDstarCuts[8]);
1249   }
1250   if(fJPSItoEle) {
1251     printf("Reconstruct J/psi from B candidates with cuts:\n");
1252     printf("    |M-MJPSI| [GeV]    < %f\n",fBtoJPSICuts[0]);
1253     printf("    dca    [cm]  < %f\n",fBtoJPSICuts[1]);
1254     printf("    cosThetaStar     < %f\n",fBtoJPSICuts[2]);
1255     printf("    pTP     [GeV/c]    > %f\n",fBtoJPSICuts[3]);
1256     printf("    pTN    [GeV/c]    > %f\n",fBtoJPSICuts[4]);
1257     printf("    |d0P|  [cm]  < %f\n",fBtoJPSICuts[5]);
1258     printf("    |d0N| [cm]  < %f\n",fBtoJPSICuts[6]);
1259     printf("    d0d0  [cm^2] < %f\n",fBtoJPSICuts[7]);
1260     printf("    cosThetaPoint    > %f\n",fBtoJPSICuts[8]);
1261   }
1262   if(f3Prong) {
1263     printf("Reconstruct 3 prong candidates.\n");
1264     printf("  D+->Kpipi cuts:\n");
1265     printf("    |M-MD+| [GeV]    < %f\n",fDplusCuts[0]);
1266     printf("    pTK     [GeV/c]    > %f\n",fDplusCuts[1]);
1267     printf("    pTPi    [GeV/c]    > %f\n",fDplusCuts[2]);
1268     printf("    |d0K|  [cm]  > %f\n",fDplusCuts[3]);
1269     printf("    |d0Pi| [cm]  > %f\n",fDplusCuts[4]);
1270     printf("    dist12    [cm]  < %f\n",fDplusCuts[5]);
1271     printf("    sigmavert [cm]   < %f\n",fDplusCuts[6]);
1272     printf("    dist prim-sec [cm] > %f\n",fDplusCuts[7]);
1273     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fDplusCuts[8]);
1274     printf("    cosThetaPoint    > %f\n",fDplusCuts[9]);
1275     printf("    Sum d0^2 [cm^2]  > %f\n",fDplusCuts[10]);
1276     printf("    dca cut [cm]  < %f\n",fDplusCuts[11]);
1277     printf("  Ds->KKpi cuts:\n");
1278     printf("    |M-MDs| [GeV]    < %f\n",fDsCuts[0]);
1279     printf("    pTK     [GeV/c]    > %f\n",fDsCuts[1]);
1280     printf("    pTPi    [GeV/c]    > %f\n",fDsCuts[2]);
1281     printf("    |d0K|  [cm]  > %f\n",fDsCuts[3]);
1282     printf("    |d0Pi| [cm]  > %f\n",fDsCuts[4]);
1283     printf("    dist12    [cm]  < %f\n",fDsCuts[5]);
1284     printf("    sigmavert [cm]   < %f\n",fDsCuts[6]);
1285     printf("    dist prim-sec [cm] > %f\n",fDsCuts[7]);
1286     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fDsCuts[8]);
1287     printf("    cosThetaPoint    > %f\n",fDsCuts[9]);
1288     printf("    Sum d0^2 [cm^2]  > %f\n",fDsCuts[10]);
1289     printf("    dca cut [cm]  < %f\n",fDsCuts[11]);
1290     printf("    Inv. Mass  phi/K0* [GeV]  < %f\n",fDsCuts[12]);
1291     printf("  Lc->pKpi cuts:\n");
1292     printf("    |M-MLc| [GeV]    < %f\n",fLcCuts[0]);
1293     printf("    pTP     [GeV/c]    > %f\n",fLcCuts[1]);
1294     printf("    pTPi and pTK [GeV/c]    > %f\n",fLcCuts[2]);
1295     printf("    |d0P|  [cm]  > %f\n",fLcCuts[3]);
1296     printf("    |d0Pi| and |d0K| [cm]  > %f\n",fLcCuts[4]);
1297     printf("    dist12    [cm]  < %f\n",fLcCuts[5]);
1298     printf("    sigmavert [cm]   < %f\n",fLcCuts[6]);
1299     printf("    dist prim-sec [cm] > %f\n",fLcCuts[7]);
1300     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fLcCuts[8]);
1301     printf("    cosThetaPoint    > %f\n",fLcCuts[9]);
1302     printf("    Sum d0^2 [cm^2]  > %f\n",fLcCuts[10]);
1303     printf("    dca cut [cm]  < %f\n",fLcCuts[11]);
1304   }
1305
1306   return;
1307 }
1308 //-----------------------------------------------------------------------------
1309 AliAODVertex* AliAnalysisVertexingHF::ReconstructSecondaryVertex(TObjArray *trkArray,
1310                                                                  Double_t &dispersion,Bool_t useTRefArray) const
1311 {
1312   // Secondary vertex reconstruction with AliVertexerTracks or AliKFParticle
1313
1314   AliESDVertex *vertexESD = 0;
1315   AliAODVertex *vertexAOD = 0;
1316
1317   if(!fSecVtxWithKF) { // AliVertexerTracks
1318
1319     AliVertexerTracks *vertexer = new AliVertexerTracks(fBzkG);
1320     vertexer->SetVtxStart(fV1);
1321     vertexESD = (AliESDVertex*)vertexer->VertexForSelectedESDTracks(trkArray);
1322     delete vertexer; vertexer=NULL;
1323
1324     if(!vertexESD) return vertexAOD;
1325
1326     if(vertexESD->GetNContributors()!=trkArray->GetEntriesFast()) {
1327       AliDebug(2,"vertexing failed");
1328       delete vertexESD; vertexESD=NULL;
1329       return vertexAOD;
1330     }
1331
1332   } else { // Kalman Filter vertexer (AliKFParticle)
1333
1334     AliKFParticle::SetField(fBzkG);
1335
1336     AliKFVertex vertexKF;
1337
1338     Int_t nTrks = trkArray->GetEntriesFast();
1339     for(Int_t i=0; i<nTrks; i++) {
1340       AliESDtrack *esdTrack = (AliESDtrack*)trkArray->At(i);
1341       AliKFParticle daughterKF(*esdTrack,211);
1342       vertexKF.AddDaughter(daughterKF);
1343     }
1344     vertexESD = new AliESDVertex(vertexKF.Parameters(),
1345                                  vertexKF.CovarianceMatrix(),
1346                                  vertexKF.GetChi2(),
1347                                  vertexKF.GetNContributors());
1348
1349   }
1350
1351   // convert to AliAODVertex
1352   Double_t pos[3],cov[6],chi2perNDF;
1353   vertexESD->GetXYZ(pos); // position
1354   vertexESD->GetCovMatrix(cov); //covariance matrix
1355   chi2perNDF = vertexESD->GetChi2toNDF();
1356   dispersion = vertexESD->GetDispersion();
1357   delete vertexESD; vertexESD=NULL;
1358
1359   Int_t nprongs= (useTRefArray ? 0 : trkArray->GetEntriesFast());
1360   vertexAOD = new AliAODVertex(pos,cov,chi2perNDF,0x0,-1,AliAODVertex::kUndef,nprongs);
1361
1362   return vertexAOD;
1363 }
1364 //-----------------------------------------------------------------------------
1365 Bool_t AliAnalysisVertexingHF::SelectInvMass(Int_t decay,
1366                                              Int_t nprongs,
1367                                              Double_t *px,
1368                                              Double_t *py,
1369                                              Double_t *pz) const {
1370   // Check invariant mass cut
1371
1372   Short_t dummycharge=0;
1373   Double_t *dummyd0 = new Double_t[nprongs];
1374   for(Int_t ip=0;ip<nprongs;ip++) dummyd0[ip]=0.;
1375   AliAODRecoDecay *rd = new AliAODRecoDecay(0x0,nprongs,dummycharge,px,py,pz,dummyd0);
1376   delete [] dummyd0; dummyd0=NULL;
1377
1378   UInt_t pdg2[2],pdg3[3],pdg4[4];
1379   Double_t mPDG,minv;
1380
1381   Bool_t retval=kFALSE;
1382   switch (decay)
1383     {
1384     case 0:                  // D0->Kpi
1385       pdg2[0]=211; pdg2[1]=321;
1386       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1387       minv = rd->InvMass(nprongs,pdg2);
1388       if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
1389       pdg2[0]=321; pdg2[1]=211;
1390       minv = rd->InvMass(nprongs,pdg2);
1391       if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
1392       break;
1393     case 1:                  // JPSI->ee
1394       pdg2[0]=11; pdg2[1]=11;
1395       mPDG=TDatabasePDG::Instance()->GetParticle(443)->Mass();
1396       minv = rd->InvMass(nprongs,pdg2);
1397       if(TMath::Abs(minv-mPDG)<fBtoJPSICuts[0]) retval=kTRUE;
1398       break;
1399     case 2:                  // D+->Kpipi
1400       pdg3[0]=211; pdg3[1]=321; pdg3[2]=211;
1401       mPDG=TDatabasePDG::Instance()->GetParticle(411)->Mass();
1402       minv = rd->InvMass(nprongs,pdg3);
1403       if(TMath::Abs(minv-mPDG)<fDplusCuts[0]) retval=kTRUE;
1404                             // Ds+->KKpi
1405       pdg3[0]=321; pdg3[1]=321; pdg3[2]=211;
1406       mPDG=TDatabasePDG::Instance()->GetParticle(431)->Mass();
1407       minv = rd->InvMass(nprongs,pdg3);
1408       if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
1409       pdg3[0]=211; pdg3[1]=321; pdg3[2]=321;
1410       minv = rd->InvMass(nprongs,pdg3);
1411       if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
1412                             // Lc->pKpi
1413       pdg3[0]=2212; pdg3[1]=321; pdg3[2]=211;
1414       mPDG=TDatabasePDG::Instance()->GetParticle(4122)->Mass();
1415       minv = rd->InvMass(nprongs,pdg3);
1416       if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
1417       pdg3[0]=211; pdg3[1]=321; pdg3[2]=2212;
1418       minv = rd->InvMass(nprongs,pdg3);
1419       if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
1420       break;
1421     case 3:                  // D*->D0pi
1422       pdg2[0]=421; pdg2[1]=211;
1423       mPDG=TDatabasePDG::Instance()->GetParticle(413)->Mass();
1424       minv = rd->InvMass(nprongs,pdg2);
1425       if(TMath::Abs(minv-mPDG)<fDstarCuts[0]) retval=kTRUE;
1426       break;
1427     case 4:                 // D0->K3pi without PID
1428       pdg4[0]=321; pdg4[1]=211; pdg4[2]=211; pdg4[3]=211;
1429       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1430       minv = rd->InvMass(nprongs,pdg4);
1431       if(TMath::Abs(minv-mPDG)<fD0to4ProngsCuts[0])
1432         retval=kTRUE;
1433       pdg4[0]=211; pdg4[1]=321; pdg4[2]=211; pdg4[3]=211;
1434       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1435       minv = rd->InvMass(nprongs,pdg4);
1436       if(TMath::Abs(minv-mPDG)<fD0to4ProngsCuts[0]) retval=kTRUE;
1437       pdg4[0]=211; pdg4[1]=211; pdg4[2]=321; pdg4[3]=211;
1438       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1439       minv = rd->InvMass(nprongs,pdg4);
1440       if(TMath::Abs(minv-mPDG)<fD0to4ProngsCuts[0]) retval=kTRUE;
1441       pdg4[0]=211; pdg4[1]=211; pdg4[2]=211; pdg4[3]=321;
1442       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1443       minv = rd->InvMass(nprongs,pdg4);
1444       if(TMath::Abs(minv-mPDG)<fD0to4ProngsCuts[0]) retval=kTRUE;
1445       break;
1446     default:
1447       printf("SelectInvMass(): wrong decay selection\n");
1448       break;
1449     }
1450
1451   delete rd; rd=NULL;
1452
1453   return retval;
1454 }
1455 //-----------------------------------------------------------------------------
1456 void AliAnalysisVertexingHF::SelectTracksAndCopyVertex(AliVEvent *event,
1457                                    TObjArray &seleTrksArray,Int_t &nSeleTrks,
1458                                                        UChar_t *seleFlags)
1459 {
1460   // Apply single-track preselection.
1461   // Fill a TObjArray with selected tracks (for displaced vertices or
1462   // soft pion from D*). Selection flag stored in seleFlags.
1463   // Create the AliESDVertex object (convert from AliAODVertex if necessary)
1464   // In case of AOD input, also fill fAODMap for track index<->ID
1465
1466   const AliVVertex *vprimary = event->GetPrimaryVertex();
1467
1468   if(fV1) { delete fV1; fV1=NULL; }
1469   if(fAODMap) { delete [] fAODMap; fAODMap=NULL; }
1470
1471   Int_t nindices=0;
1472   UShort_t *indices = 0;
1473   Double_t pos[3],cov[6];
1474
1475   if(!fInputAOD) { // ESD
1476     fV1 = new AliESDVertex(*((AliESDVertex*)vprimary));
1477   } else {         // AOD
1478     vprimary->GetXYZ(pos);
1479     vprimary->GetCovarianceMatrix(cov);
1480     fV1 = new AliESDVertex(pos,cov,100.,100,vprimary->GetName());
1481     indices = new UShort_t[event->GetNumberOfTracks()];
1482     fAODMap = new Int_t[100000];
1483   }
1484
1485
1486   Int_t entries = (Int_t)event->GetNumberOfTracks();
1487   Bool_t okDisplaced=kFALSE,okSoftPi=kFALSE;
1488   nSeleTrks=0;
1489
1490   // transfer ITS tracks from event to arrays
1491   for(Int_t i=0; i<entries; i++) {
1492     AliVTrack *track = (AliVTrack*)event->GetTrack(i);
1493
1494     // TEMPORARY: check that the cov matrix is there
1495     Double_t cov[21];
1496     if(!track->GetCovarianceXYZPxPyPz(cov)) continue;
1497
1498     if(fInputAOD) {
1499       AliAODTrack *aodt = (AliAODTrack*)track;
1500       if(aodt->GetUsedForPrimVtxFit()) {
1501         indices[nindices]=aodt->GetID(); nindices++;
1502       }
1503       fAODMap[(Int_t)aodt->GetID()] = i;
1504     }
1505
1506     AliESDtrack *esdt = 0;
1507
1508     if(!fInputAOD) {
1509       esdt = (AliESDtrack*)track;
1510     } else {
1511       esdt = new AliESDtrack(track);
1512     }
1513
1514     // single track selection
1515     okDisplaced=kFALSE; okSoftPi=kFALSE;
1516     if(SingleTrkCuts(esdt,okDisplaced,okSoftPi)) {
1517       seleTrksArray.AddLast(esdt);
1518       seleFlags[nSeleTrks]=0;
1519       if(okDisplaced) SETBIT(seleFlags[nSeleTrks],kBitDispl);
1520       if(okSoftPi)    SETBIT(seleFlags[nSeleTrks],kBitSoftPi);
1521       nSeleTrks++;
1522     } else {
1523       if(fInputAOD) delete esdt;
1524       esdt = NULL;
1525       continue;
1526     }
1527
1528   } // end loop on tracks
1529
1530   // primary vertex from AOD
1531   if(fInputAOD) {
1532     delete fV1; fV1=NULL;
1533     vprimary->GetXYZ(pos);
1534     vprimary->GetCovarianceMatrix(cov);
1535     Double_t chi2toNDF = vprimary->GetChi2perNDF();
1536     Int_t ncontr=nindices;
1537     if(!strcmp(vprimary->GetTitle(),"VertexerTracksWithContraint")) ncontr += 1;
1538     Double_t chi2=chi2toNDF*(2.*(Double_t)ncontr-3.);
1539     fV1 = new AliESDVertex(pos,cov,chi2,ncontr,vprimary->GetName());
1540     fV1->SetTitle(vprimary->GetTitle());
1541     fV1->SetIndices(nindices,indices);
1542   }
1543   if(indices) { delete [] indices; indices=NULL; }
1544
1545
1546   return;
1547 }
1548 //-----------------------------------------------------------------------------
1549 void AliAnalysisVertexingHF::SetD0toKpiCuts(Double_t cut0,Double_t cut1,
1550                                    Double_t cut2,Double_t cut3,Double_t cut4,
1551                                    Double_t cut5,Double_t cut6,
1552                                    Double_t cut7,Double_t cut8)
1553 {
1554   // Set the cuts for D0 selection
1555   fD0toKpiCuts[0] = cut0;
1556   fD0toKpiCuts[1] = cut1;
1557   fD0toKpiCuts[2] = cut2;
1558   fD0toKpiCuts[3] = cut3;
1559   fD0toKpiCuts[4] = cut4;
1560   fD0toKpiCuts[5] = cut5;
1561   fD0toKpiCuts[6] = cut6;
1562   fD0toKpiCuts[7] = cut7;
1563   fD0toKpiCuts[8] = cut8;
1564
1565   return;
1566 }
1567 //-----------------------------------------------------------------------------
1568 void AliAnalysisVertexingHF::SetD0toKpiCuts(const Double_t cuts[9])
1569 {
1570   // Set the cuts for D0 selection
1571
1572   for(Int_t i=0; i<9; i++) fD0toKpiCuts[i] = cuts[i];
1573
1574   return;
1575 }
1576 //-----------------------------------------------------------------------------
1577 void AliAnalysisVertexingHF::SetD0fromDstarCuts(Double_t cut0,Double_t cut1,
1578                                    Double_t cut2,Double_t cut3,Double_t cut4,
1579                                    Double_t cut5,Double_t cut6,
1580                                    Double_t cut7,Double_t cut8)
1581 {
1582   // Set the cuts for D0 from D* selection
1583   fD0fromDstarCuts[0] = cut0;
1584   fD0fromDstarCuts[1] = cut1;
1585   fD0fromDstarCuts[2] = cut2;
1586   fD0fromDstarCuts[3] = cut3;
1587   fD0fromDstarCuts[4] = cut4;
1588   fD0fromDstarCuts[5] = cut5;
1589   fD0fromDstarCuts[6] = cut6;
1590   fD0fromDstarCuts[7] = cut7;
1591   fD0fromDstarCuts[8] = cut8;
1592
1593   return;
1594 }
1595 //-----------------------------------------------------------------------------
1596 void AliAnalysisVertexingHF::SetD0fromDstarCuts(const Double_t cuts[9])
1597 {
1598   // Set the cuts for D0 from D* selection
1599
1600   for(Int_t i=0; i<9; i++) fD0fromDstarCuts[i] = cuts[i];
1601
1602   return;
1603 }
1604 //-----------------------------------------------------------------------------
1605 void AliAnalysisVertexingHF::SetDstarCuts(Double_t cut0,Double_t cut1,
1606                                           Double_t cut2,Double_t cut3,
1607                                           Double_t cut4)
1608 {
1609   // Set the cuts for D* selection
1610   fDstarCuts[0] = cut0;
1611   fDstarCuts[1] = cut1;
1612   fDstarCuts[2] = cut2;
1613   fDstarCuts[3] = cut3;
1614   fDstarCuts[4] = cut4;
1615
1616   return;
1617 }
1618 //-----------------------------------------------------------------------------
1619 void AliAnalysisVertexingHF::SetDstarCuts(const Double_t cuts[5])
1620 {
1621   // Set the cuts for D* selection
1622
1623   for(Int_t i=0; i<5; i++) fDstarCuts[i] = cuts[i];
1624
1625   return;
1626 }
1627 //-----------------------------------------------------------------------------
1628 void AliAnalysisVertexingHF::SetBtoJPSICuts(Double_t cut0,Double_t cut1,
1629                                    Double_t cut2,Double_t cut3,Double_t cut4,
1630                                    Double_t cut5,Double_t cut6,
1631                                    Double_t cut7,Double_t cut8)
1632 {
1633   // Set the cuts for J/psi from B selection
1634   fBtoJPSICuts[0] = cut0;
1635   fBtoJPSICuts[1] = cut1;
1636   fBtoJPSICuts[2] = cut2;
1637   fBtoJPSICuts[3] = cut3;
1638   fBtoJPSICuts[4] = cut4;
1639   fBtoJPSICuts[5] = cut5;
1640   fBtoJPSICuts[6] = cut6;
1641   fBtoJPSICuts[7] = cut7;
1642   fBtoJPSICuts[8] = cut8;
1643
1644   return;
1645 }
1646 //-----------------------------------------------------------------------------
1647 void AliAnalysisVertexingHF::SetBtoJPSICuts(const Double_t cuts[9])
1648 {
1649   // Set the cuts for J/psi from B selection
1650
1651   for(Int_t i=0; i<9; i++) fBtoJPSICuts[i] = cuts[i];
1652
1653   return;
1654 }
1655 //-----------------------------------------------------------------------------
1656 void AliAnalysisVertexingHF::SetDplusCuts(Double_t cut0,Double_t cut1,
1657                                    Double_t cut2,Double_t cut3,Double_t cut4,
1658                                    Double_t cut5,Double_t cut6,
1659                                    Double_t cut7,Double_t cut8,
1660                                    Double_t cut9,Double_t cut10,Double_t cut11)
1661 {
1662   // Set the cuts for Dplus->Kpipi selection
1663   fDplusCuts[0] = cut0;
1664   fDplusCuts[1] = cut1;
1665   fDplusCuts[2] = cut2;
1666   fDplusCuts[3] = cut3;
1667   fDplusCuts[4] = cut4;
1668   fDplusCuts[5] = cut5;
1669   fDplusCuts[6] = cut6;
1670   fDplusCuts[7] = cut7;
1671   fDplusCuts[8] = cut8;
1672   fDplusCuts[9] = cut9;
1673   fDplusCuts[10] = cut10;
1674   fDplusCuts[11] = cut11;
1675
1676   return;
1677 }
1678 //-----------------------------------------------------------------------------
1679 void AliAnalysisVertexingHF::SetDplusCuts(const Double_t cuts[12])
1680 {
1681   // Set the cuts for Dplus->Kpipi selection
1682
1683   for(Int_t i=0; i<12; i++) fDplusCuts[i] = cuts[i];
1684
1685   return;
1686 }
1687 //-----------------------------------------------------------------------------
1688 void AliAnalysisVertexingHF::SetDsCuts(Double_t cut0,Double_t cut1,
1689                                    Double_t cut2,Double_t cut3,Double_t cut4,
1690                                    Double_t cut5,Double_t cut6,
1691                                    Double_t cut7,Double_t cut8,
1692                                    Double_t cut9,Double_t cut10,
1693                                    Double_t cut11,Double_t cut12)
1694 {
1695   // Set the cuts for Ds->KKpi selection
1696   fDsCuts[0] = cut0;
1697   fDsCuts[1] = cut1;
1698   fDsCuts[2] = cut2;
1699   fDsCuts[3] = cut3;
1700   fDsCuts[4] = cut4;
1701   fDsCuts[5] = cut5;
1702   fDsCuts[6] = cut6;
1703   fDsCuts[7] = cut7;
1704   fDsCuts[8] = cut8;
1705   fDsCuts[9] = cut9;
1706   fDsCuts[10] = cut10;
1707   fDsCuts[11] = cut11;
1708   fDsCuts[12] = cut12;
1709
1710   return;
1711 }
1712 //-----------------------------------------------------------------------------
1713 void AliAnalysisVertexingHF::SetDsCuts(const Double_t cuts[13])
1714 {
1715   // Set the cuts for Ds->KKpi selection
1716
1717   for(Int_t i=0; i<13; i++) fDsCuts[i] = cuts[i];
1718
1719   return;
1720 }
1721 //-----------------------------------------------------------------------------
1722 void AliAnalysisVertexingHF::SetLcCuts(Double_t cut0,Double_t cut1,
1723                                    Double_t cut2,Double_t cut3,Double_t cut4,
1724                                    Double_t cut5,Double_t cut6,
1725                                    Double_t cut7,Double_t cut8,
1726                                    Double_t cut9,Double_t cut10,Double_t cut11)
1727 {
1728   // Set the cuts for Lc->pKpi selection
1729   fLcCuts[0] = cut0;
1730   fLcCuts[1] = cut1;
1731   fLcCuts[2] = cut2;
1732   fLcCuts[3] = cut3;
1733   fLcCuts[4] = cut4;
1734   fLcCuts[5] = cut5;
1735   fLcCuts[6] = cut6;
1736   fLcCuts[7] = cut7;
1737   fLcCuts[8] = cut8;
1738   fLcCuts[9] = cut9;
1739   fLcCuts[10] = cut10;
1740   fLcCuts[11] = cut11;
1741
1742   return;
1743 }
1744 //-----------------------------------------------------------------------------
1745 void AliAnalysisVertexingHF::SetLcCuts(const Double_t cuts[12])
1746 {
1747   // Set the cuts for Lc->pKpi selection
1748
1749   for(Int_t i=0; i<12; i++) fLcCuts[i] = cuts[i];
1750
1751   return;
1752 }
1753 //-----------------------------------------------------------------------------
1754 void AliAnalysisVertexingHF::SetD0to4ProngsCuts(Double_t cut0,Double_t cut1,
1755                                    Double_t cut2,Double_t cut3,Double_t cut4,
1756                                    Double_t cut5,Double_t cut6,
1757                                    Double_t cut7,Double_t cut8)
1758 {
1759   // Set the cuts for D0->Kpipipi selection
1760
1761   fD0to4ProngsCuts[0] = cut0;
1762   fD0to4ProngsCuts[1] = cut1;
1763   fD0to4ProngsCuts[2] = cut2;
1764   fD0to4ProngsCuts[3] = cut3;
1765   fD0to4ProngsCuts[4] = cut4;
1766   fD0to4ProngsCuts[5] = cut5;
1767   fD0to4ProngsCuts[6] = cut6;
1768   fD0to4ProngsCuts[7] = cut7;
1769   fD0to4ProngsCuts[8] = cut8;
1770
1771   return;
1772 }
1773 //-----------------------------------------------------------------------------
1774 void AliAnalysisVertexingHF::SetD0to4ProngsCuts(const Double_t cuts[9])
1775 {
1776   // Set the cuts for D0->Kpipipi selection
1777
1778   for(Int_t i=0; i<9; i++) fD0to4ProngsCuts[i] = cuts[i];
1779
1780   return;
1781 }
1782 //-----------------------------------------------------------------------------
1783 Bool_t AliAnalysisVertexingHF::SingleTrkCuts(AliESDtrack *trk,
1784                                              Bool_t &okDisplaced,Bool_t &okSoftPi) const
1785 {
1786   // Check if track passes some kinematical cuts
1787
1788   // this is needed to store the impact parameters
1789   trk->RelateToVertex(fV1,fBzkG,kVeryBig);
1790
1791   UInt_t selectInfo;
1792   //
1793   // Track selection, displaced tracks
1794   selectInfo = 0;
1795   if(fTrackFilter) {
1796     selectInfo = fTrackFilter->IsSelected(trk);
1797   }
1798   if(selectInfo) okDisplaced=kTRUE;
1799   // Track selection, soft pions
1800   selectInfo = 0;
1801   if(fDstar && fTrackFilterSoftPi) {
1802     selectInfo = fTrackFilterSoftPi->IsSelected(trk);
1803   }
1804   if(selectInfo) okSoftPi=kTRUE;
1805
1806   if(okDisplaced || okSoftPi) return kTRUE;
1807
1808   return kFALSE;
1809 }
1810 //-----------------------------------------------------------------------------