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             if(ioCascade) {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         if(io2Prong) {delete io2Prong; io2Prong=NULL;}
 471       }
 472
 473       twoTrackArray1->Clear();
 474       if((!f3Prong && !f4Prong) || isLikeSignPair)  {
 475         negtrack1=0;
 476         delete vertexp1n1;
 477         continue;
 478       }
 479
 480
 481       // 2nd LOOP  ON  POSITIVE  TRACKS
 482       for(iTrkP2=iTrkP1+1; iTrkP2<nSeleTrks; iTrkP2++) {
 483
 484         if(iTrkP2==iTrkP1 || iTrkP2==iTrkN1) continue;
 485
 486         if(iTrkP2%1==0) AliDebug(1,Form("    2nd loop on pos: track number %d of %d",iTrkP2,nSeleTrks));
 487
 488         // get track from tracks array
 489         postrack2 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkP2);
 490
 491         if(postrack2->Charge()<0) continue;
 492
 493         if(!TESTBIT(seleFlags[iTrkP2],kBitDispl)) continue;
 494
 495         // back to primary vertex
 496         postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 497         postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 498         negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 499         //printf("********** %d %d %d\n",postrack1->GetID(),postrack2->GetID(),negtrack1->GetID());
 500
 501         dcap2n1 = postrack2->GetDCA(negtrack1,fBzkG,xdummy,ydummy);
 502         if(dcap2n1>dcaMax) { postrack2=0; continue; }
 503         dcap1p2 = postrack2->GetDCA(postrack1,fBzkG,xdummy,ydummy);
 504         if(dcap1p2>dcaMax) { postrack2=0; continue; }
 505
 506         // Vertexing
 507         twoTrackArray2->AddAt(postrack2,0);
 508         twoTrackArray2->AddAt(negtrack1,1);
 509         AliAODVertex *vertexp2n1 = ReconstructSecondaryVertex(twoTrackArray2,dispersion);
 510         if(!vertexp2n1) {
 511           twoTrackArray2->Clear();
 512           postrack2=0;
 513           continue;
 514         }
 515
 516         // 3 prong candidates
 517         if(f3Prong) {
 518
 519           threeTrackArray->AddAt(postrack1,0);
 520           threeTrackArray->AddAt(negtrack1,1);
 521           threeTrackArray->AddAt(postrack2,2);
 522
 523           AliAODVertex* secVert3PrAOD = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 524           io3Prong = Make3Prong(threeTrackArray,event,secVert3PrAOD,dispersion,vertexp1n1,vertexp2n1,dcap1n1,dcap2n1,dcap1p2,ok3Prong);
 525           if(ok3Prong) {
 526             AliAODVertex *v3Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert3PrAOD);
 527             if(fInputAOD) AddDaughterRefs(v3Prong,event,threeTrackArray);
 528             rd = new(aodCharm3ProngRef[i3Prong++])AliAODRecoDecayHF3Prong(*io3Prong);
 529             rd->SetSecondaryVtx(v3Prong);
 530             v3Prong->SetParent(rd);
 531           }
 532           if(io3Prong) {delete io3Prong; io3Prong=NULL;}
 533           if(secVert3PrAOD) {delete secVert3PrAOD; secVert3PrAOD=NULL;}
 534         }
 535
 536         // 4 prong candidates
 537         if(f4Prong) {
 538
 539           // back to primary vertex
 540           postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 541           postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 542           negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 543           // Vertexing for these 3 (can be taken from above?)
 544           threeTrackArray->AddAt(postrack1,0);
 545           threeTrackArray->AddAt(negtrack1,1);
 546           threeTrackArray->AddAt(postrack2,2);
 547           AliAODVertex* vertexp1n1p2 = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 548
 549           // 3rd LOOP  ON  NEGATIVE  TRACKS (for 4 prong)
 550           for(iTrkN2=iTrkN1+1; iTrkN2<nSeleTrks; iTrkN2++) {
 551
 552             if(iTrkN2==iTrkP1 || iTrkN2==iTrkP2 || iTrkN2==iTrkN1) continue;
 553
 554             if(iTrkN2%1==0) AliDebug(1,Form("    3rd loop on neg: track number %d of %d",iTrkN2,nSeleTrks));
 555
 556             // get track from tracks array
 557             negtrack2 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkN2);
 558
 559             if(negtrack2->Charge()>0) continue;
 560
 561             if(!TESTBIT(seleFlags[iTrkN2],kBitDispl)) continue;
 562
 563             // back to primary vertex
 564             postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 565             postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 566             negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 567             negtrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 568             dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 569             if(dcap1n2>dcaMax) { negtrack2=0; continue; }
 570             dcap2n2 = postrack2->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 571             if(dcap2n2>dcaMax) { negtrack2=0; continue; }
 572
 573             // Vertexing
 574             fourTrackArray->AddAt(postrack1,0);
 575             fourTrackArray->AddAt(negtrack1,1);
 576             fourTrackArray->AddAt(postrack2,2);
 577             fourTrackArray->AddAt(negtrack2,3);
 578
 579             AliAODVertex* secVert4PrAOD = ReconstructSecondaryVertex(fourTrackArray,dispersion);
 580             io4Prong = Make4Prong(fourTrackArray,event,secVert4PrAOD,vertexp1n1,vertexp1n1p2,dcap1n1,dcap1n2,dcap2n1,dcap2n2,ok4Prong);
 581             if(ok4Prong) {
 582               AliAODVertex *v4Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert4PrAOD);
 583               if(fInputAOD) AddDaughterRefs(v4Prong,event,fourTrackArray);
 584               rd = new(aodCharm4ProngRef[i4Prong++])AliAODRecoDecayHF4Prong(*io4Prong);
 585               rd->SetSecondaryVtx(v4Prong);
 586               v4Prong->SetParent(rd);
 587             }
 588
 589             if(io4Prong) {delete io4Prong; io4Prong=NULL;}
 590             if(secVert4PrAOD) {delete secVert4PrAOD; secVert4PrAOD=NULL;}
 591             fourTrackArray->Clear();
 592             negtrack2 = 0;
 593
 594           } // end loop on negative tracks
 595
 596           threeTrackArray->Clear();
 597           delete vertexp1n1p2;
 598
 599         }
 600
 601         postrack2 = 0;
 602         delete vertexp2n1;
 603
 604       } // end 2nd loop on positive tracks
 605
 606       twoTrackArray2->Clear();
 607
 608       // 2nd LOOP  ON  NEGATIVE  TRACKS (for 3 prong +--)
 609       for(iTrkN2=iTrkN1+1; iTrkN2<nSeleTrks; iTrkN2++) {
 610
 611         if(iTrkN2==iTrkP1 || iTrkN2==iTrkP2 || iTrkN2==iTrkN1) continue;
 612
 613         if(iTrkN2%1==0) AliDebug(1,Form("    2nd loop on neg: track number %d of %d",iTrkN2,nSeleTrks));
 614
 615         // get track from tracks array
 616         negtrack2 = (AliESDtrack*)seleTrksArray.UncheckedAt(iTrkN2);
 617
 618         if(negtrack2->Charge()>0) continue;
 619
 620         if(!TESTBIT(seleFlags[iTrkN2],kBitDispl)) continue;
 621
 622         // back to primary vertex
 623         postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 624         negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 625         negtrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 626         //printf("********** %d %d %d\n",postrack1->GetID(),negtrack1->GetID(),negtrack2->GetID());
 627
 628         dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 629         if(dcap1n2>dcaMax) { negtrack2=0; continue; }
 630         dcan1n2 = negtrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 631         if(dcan1n2>dcaMax) { negtrack2=0; continue; }
 632
 633         // Vertexing
 634         twoTrackArray2->AddAt(postrack1,0);
 635         twoTrackArray2->AddAt(negtrack2,1);
 636
 637         AliAODVertex *vertexp1n2 = ReconstructSecondaryVertex(twoTrackArray2,dispersion);
 638         if(!vertexp1n2) {
 639           twoTrackArray2->Clear();
 640           negtrack2=0;
 641           continue;
 642         }
 643
 644         if(f3Prong) {
 645           threeTrackArray->AddAt(negtrack1,0);
 646           threeTrackArray->AddAt(postrack1,1);
 647           threeTrackArray->AddAt(negtrack2,2);
 648           AliAODVertex* secVert3PrAOD = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 649           io3Prong = Make3Prong(threeTrackArray,event,secVert3PrAOD,dispersion,vertexp1n1,vertexp1n2,dcap1n1,dcap1n2,dcan1n2,ok3Prong);
 650           if(ok3Prong) {
 651             AliAODVertex *v3Prong = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert3PrAOD);
 652             if(fInputAOD) AddDaughterRefs(v3Prong,event,threeTrackArray);
 653             rd = new(aodCharm3ProngRef[i3Prong++])AliAODRecoDecayHF3Prong(*io3Prong);
 654             rd->SetSecondaryVtx(v3Prong);
 655             v3Prong->SetParent(rd);
 656           }
 657           if(io3Prong) {delete io3Prong; io3Prong=NULL;}
 658           if(secVert3PrAOD) {delete secVert3PrAOD; secVert3PrAOD=NULL;}
 659         }
 660
 661         negtrack2 = 0;
 662         delete vertexp1n2;
 663
 664       } // end 2nd loop on negative tracks
 665       twoTrackArray2->Clear();
 666
 667       negtrack1 = 0;
 668       delete vertexp1n1;
 669     } // end 1st loop on negative tracks
 670
 671     postrack1 = 0;
 672   }  // end 1st loop on positive tracks
 673
 674
 675   AliDebug(1,Form(" Total HF vertices in event = %d;",
 676                   (Int_t)aodVerticesHFTClArr->GetEntriesFast()));
 677   if(fD0toKpi) {
 678     AliDebug(1,Form(" D0->Kpi in event = %d;",
 679                     (Int_t)aodD0toKpiTClArr->GetEntriesFast()));
 680   }
 681   if(fJPSItoEle) {
 682     AliDebug(1,Form(" JPSI->ee in event = %d;",
 683                     (Int_t)aodJPSItoEleTClArr->GetEntriesFast()));
 684   }
 685   if(f3Prong) {
 686     AliDebug(1,Form(" Charm->3Prong in event = %d;",
 687                     (Int_t)aodCharm3ProngTClArr->GetEntriesFast()));
 688   }
 689   if(f4Prong) {
 690     AliDebug(1,Form(" Charm->4Prong in event = %d;\n",
 691                     (Int_t)aodCharm4ProngTClArr->GetEntriesFast()));
 692   }
 693   if(fDstar) {
 694     AliDebug(1,Form(" D*->D0pi in event = %d;\n",
 695                     (Int_t)aodDstarTClArr->GetEntriesFast()));
 696   }
 697   if(fLikeSign) {
 698     AliDebug(1,Form(" Like-sign pairs in event = %d;\n",
 699                     (Int_t)aodLikeSignTClArr->GetEntriesFast()));
 700   }
 701
 702
 703   twoTrackArray1->Delete();  delete twoTrackArray1;
 704   twoTrackArray2->Delete();  delete twoTrackArray2;
 705   twoTrackArrayCasc->Delete();  delete twoTrackArrayCasc;
 706   threeTrackArray->Clear();
 707   threeTrackArray->Delete(); delete threeTrackArray;
 708   fourTrackArray->Delete();  delete fourTrackArray;
 709   delete [] seleFlags; seleFlags=NULL;
 710
 711   if(fInputAOD) {
 712     seleTrksArray.Delete();
 713     if(fAODMap) { delete [] fAODMap; fAODMap=NULL; }
 714   }
 715
 716   return;
 717 }
 718 //----------------------------------------------------------------------------
 719 void AliAnalysisVertexingHF::AddDaughterRefs(AliAODVertex *v,AliVEvent *event,
 720                                              TObjArray *trkArray) const
 721 {
 722   // Add the AOD tracks as daughters of the vertex (TRef)
 723
 724   Int_t nTrks = trkArray->GetEntriesFast();
 725
 726   AliExternalTrackParam *track = 0;
 727   AliAODTrack *aodTrack = 0;
 728   Int_t id;
 729
 730   for(Int_t i=0; i<nTrks; i++) {
 731     track = (AliExternalTrackParam*)trkArray->UncheckedAt(i);
 732     id = (Int_t)track->GetID();
 733     //printf("---> %d\n",id);
 734     if(id<0) continue; // this track is a AliAODRecoDecay
 735     aodTrack = (AliAODTrack*)event->GetTrack(fAODMap[id]);
 736     v->AddDaughter(aodTrack);
 737   }
 738
 739   return;
 740 }
 741 //----------------------------------------------------------------------------
 742 AliAODRecoCascadeHF* AliAnalysisVertexingHF::MakeCascade(
 743                                    TObjArray *twoTrackArray,AliVEvent *event,
 744                                    AliAODVertex *secVert,
 745                                    AliAODRecoDecayHF2Prong *rd2Prong,
 746                                    Double_t dca,
 747                                    Bool_t &okDstar) const
 748 {
 749   // Make the cascade as a 2Prong decay and check if it passes Dstar
 750   // reconstruction cuts
 751
 752   okDstar = kFALSE;
 753
 754   Bool_t dummy1,dummy2,dummy3;
 755
 756   // We use Make2Prong to construct the AliAODRecoCascadeHF
 757   // (which inherits from AliAODRecoDecayHF2Prong)
 758   AliAODRecoCascadeHF *theCascade =
 759     (AliAODRecoCascadeHF*)Make2Prong(twoTrackArray,event,secVert,dca,
 760                                      dummy1,dummy2,dummy3);
 761   if(!theCascade) return 0x0;
 762
 763   // charge
 764   AliESDtrack *trackPi = (AliESDtrack*)twoTrackArray->UncheckedAt(0);
 765   theCascade->SetCharge(trackPi->Charge());
 766
 767   //--- selection cuts
 768   //
 769   AliAODRecoCascadeHF *tmpCascade = new AliAODRecoCascadeHF(*theCascade);
 770   tmpCascade->GetSecondaryVtx()->AddDaughter(trackPi);
 771   tmpCascade->GetSecondaryVtx()->AddDaughter(rd2Prong);
 772   AliAODVertex *primVertexAOD=0;
 773   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
 774     // take event primary vertex
 775     primVertexAOD = PrimaryVertex();
 776     tmpCascade->SetOwnPrimaryVtx(primVertexAOD);
 777     rd2Prong->SetOwnPrimaryVtx(primVertexAOD);
 778   }
 779   // select D*->D0pi
 780   if(fDstar) {
 781     Bool_t testD0=kTRUE;
 782     okDstar = tmpCascade->SelectDstar(fDstarCuts,fD0fromDstarCuts,testD0);
 783   }
 784   tmpCascade->GetSecondaryVtx()->RemoveDaughters();
 785   tmpCascade->UnsetOwnPrimaryVtx();
 786   delete tmpCascade; tmpCascade=NULL;
 787   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
 788     rd2Prong->UnsetOwnPrimaryVtx();
 789   }
 790   if(primVertexAOD) {delete primVertexAOD; primVertexAOD=NULL;}
 791   //---
 792
 793   return theCascade;
 794 }
 795 //-----------------------------------------------------------------------------
 796 AliAODRecoDecayHF2Prong *AliAnalysisVertexingHF::Make2Prong(
 797                                    TObjArray *twoTrackArray,AliVEvent *event,
 798                                    AliAODVertex *secVert,Double_t dca,
 799                                    Bool_t &okD0,Bool_t &okJPSI,
 800                                    Bool_t &okD0fromDstar) const
 801 {
 802   // Make 2Prong candidates and check if they pass D0toKpi or BtoJPSI
 803   // reconstruction cuts
 804   // G.E.Bruno (J/psi), A.Dainese (D0->Kpi)
 805
 806   okD0=kFALSE; okJPSI=kFALSE; okD0fromDstar=kFALSE;
 807
 808   Double_t px[2],py[2],pz[2],d0[2],d0err[2];
 809
 810   AliESDtrack *postrack = (AliESDtrack*)twoTrackArray->UncheckedAt(0);
 811   AliESDtrack *negtrack = (AliESDtrack*)twoTrackArray->UncheckedAt(1);
 812
 813   // propagate tracks to secondary vertex, to compute inv. mass
 814   postrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 815   negtrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 816
 817   Double_t momentum[3];
 818   postrack->GetPxPyPz(momentum);
 819   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
 820   negtrack->GetPxPyPz(momentum);
 821   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
 822
 823
 824   // invariant mass cut (try to improve coding here..)
 825   Bool_t okMassCut=kFALSE;
 826   if(!okMassCut && fD0toKpi)   if(SelectInvMass(0,2,px,py,pz)) okMassCut=kTRUE;
 827   if(!okMassCut && fJPSItoEle) if(SelectInvMass(1,2,px,py,pz)) okMassCut=kTRUE;
 828   if(!okMassCut && fDstar)     if(SelectInvMass(3,2,px,py,pz)) okMassCut=kTRUE;
 829   if(!okMassCut) {
 830     AliDebug(2," candidate didn't pass mass cut");
 831     return 0x0;
 832   }
 833
 834   // primary vertex to be used by this candidate
 835   AliAODVertex *primVertexAOD  = PrimaryVertex(twoTrackArray,event);
 836   if(!primVertexAOD) return 0x0;
 837
 838   Double_t d0z0[2],covd0z0[3];
 839   postrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 840   d0[0] = d0z0[0];
 841   d0err[0] = TMath::Sqrt(covd0z0[0]);
 842   negtrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 843   d0[1] = d0z0[0];
 844   d0err[1] = TMath::Sqrt(covd0z0[0]);
 845
 846   // create the object AliAODRecoDecayHF2Prong
 847   AliAODRecoDecayHF2Prong *the2Prong = new AliAODRecoDecayHF2Prong(secVert,px,py,pz,d0,d0err,dca);
 848   the2Prong->SetOwnPrimaryVtx(primVertexAOD);
 849   UShort_t id[2]={(UShort_t)postrack->GetID(),(UShort_t)negtrack->GetID()};
 850   the2Prong->SetProngIDs(2,id);
 851   delete primVertexAOD; primVertexAOD=NULL;
 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   }
 870
 871   // get PID info from ESD
 872   Double_t esdpid0[5]={0.,0.,0.,0.,0.};
 873   if(postrack->GetStatus()&AliESDtrack::kESDpid) postrack->GetESDpid(esdpid0);
 874   Double_t esdpid1[5]={0.,0.,0.,0.,0.};
 875   if(negtrack->GetStatus()&AliESDtrack::kESDpid) negtrack->GetESDpid(esdpid1);
 876   Double_t esdpid[10];
 877   for(Int_t i=0;i<5;i++) {
 878     esdpid[i]   = esdpid0[i];
 879     esdpid[5+i] = esdpid1[i];
 880   }
 881   the2Prong->SetPID(2,esdpid);
 882
 883   return the2Prong;
 884 }
 885 //----------------------------------------------------------------------------
 886 AliAODRecoDecayHF3Prong* AliAnalysisVertexingHF::Make3Prong(
 887                              TObjArray *threeTrackArray,AliVEvent *event,
 888                              AliAODVertex *secVert,Double_t dispersion,
 889                              AliAODVertex *vertexp1n1,AliAODVertex *vertexp2n1,
 890                              Double_t dcap1n1,Double_t dcap2n1,Double_t dcap1p2,
 891                              Bool_t &ok3Prong) const
 892 {
 893   // Make 3Prong candidates and check if they pass Dplus or Ds or Lambdac
 894   // reconstruction cuts
 895   // E.Bruna, F.Prino
 896
 897
 898   ok3Prong=kFALSE;
 899   if(!secVert || !vertexp1n1 || !vertexp2n1) return 0x0;
 900
 901   Double_t px[3],py[3],pz[3],d0[3],d0err[3];
 902   Double_t momentum[3];
 903
 904
 905   AliESDtrack *postrack1 = (AliESDtrack*)threeTrackArray->UncheckedAt(0);
 906   AliESDtrack *negtrack  = (AliESDtrack*)threeTrackArray->UncheckedAt(1);
 907   AliESDtrack *postrack2 = (AliESDtrack*)threeTrackArray->UncheckedAt(2);
 908
 909   postrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
 910   negtrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 911   postrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
 912   postrack1->GetPxPyPz(momentum);
 913   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
 914   negtrack->GetPxPyPz(momentum);
 915   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
 916   postrack2->GetPxPyPz(momentum);
 917   px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
 918
 919   // invariant mass cut for D+, Ds, Lc
 920   Bool_t okMassCut=kFALSE;
 921   if(!okMassCut && f3Prong) if(SelectInvMass(2,3,px,py,pz)) okMassCut=kTRUE;
 922   if(!okMassCut) {
 923     AliDebug(2," candidate didn't pass mass cut");
 924     return 0x0;
 925   }
 926
 927   // primary vertex to be used by this candidate
 928   AliAODVertex *primVertexAOD  = PrimaryVertex(threeTrackArray,event);
 929   if(!primVertexAOD) return 0x0;
 930
 931   Double_t d0z0[2],covd0z0[3];
 932   postrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 933   d0[0]=d0z0[0];
 934   d0err[0] = TMath::Sqrt(covd0z0[0]);
 935   negtrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 936   d0[1]=d0z0[0];
 937   d0err[1] = TMath::Sqrt(covd0z0[0]);
 938   postrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 939   d0[2]=d0z0[0];
 940   d0err[2] = TMath::Sqrt(covd0z0[0]);
 941
 942
 943   // create the object AliAODRecoDecayHF3Prong
 944   Double_t pos[3]; primVertexAOD->GetXYZ(pos);
 945   Double_t dca[3]={dcap1n1,dcap2n1,dcap1p2};
 946   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]));
 947   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]));
 948   Short_t charge=(Short_t)(postrack1->Charge()*postrack2->Charge()*negtrack->Charge());
 949   AliAODRecoDecayHF3Prong *the3Prong = new AliAODRecoDecayHF3Prong(secVert,px,py,pz,d0,d0err,dca,dispersion,dist12,dist23,charge);
 950   the3Prong->SetOwnPrimaryVtx(primVertexAOD);
 951   UShort_t id[3]={(UShort_t)postrack1->GetID(),(UShort_t)negtrack->GetID(),(UShort_t)postrack2->GetID()};
 952   the3Prong->SetProngIDs(3,id);
 953
 954   delete primVertexAOD; primVertexAOD=NULL;
 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   }
 969
 970   // get PID info from ESD
 971   Double_t esdpid0[5]={0.,0.,0.,0.,0.};
 972   if(postrack1->GetStatus()&AliESDtrack::kESDpid) postrack1->GetESDpid(esdpid0);
 973   Double_t esdpid1[5]={0.,0.,0.,0.,0.};
 974   if(negtrack->GetStatus()&AliESDtrack::kESDpid) negtrack->GetESDpid(esdpid1);
 975   Double_t esdpid2[5]={0.,0.,0.,0.,0.};
 976   if(postrack2->GetStatus()&AliESDtrack::kESDpid) postrack2->GetESDpid(esdpid2);
 977
 978   Double_t esdpid[15];
 979   for(Int_t i=0;i<5;i++) {
 980     esdpid[i]    = esdpid0[i];
 981     esdpid[5+i]  = esdpid1[i];
 982     esdpid[10+i] = esdpid2[i];
 983   }
 984   the3Prong->SetPID(3,esdpid);
 985
 986   return the3Prong;
 987 }
 988 //----------------------------------------------------------------------------
 989 AliAODRecoDecayHF4Prong* AliAnalysisVertexingHF::Make4Prong(
 990                              TObjArray *fourTrackArray,AliVEvent *event,
 991                              AliAODVertex *secVert,
 992                              AliAODVertex *vertexp1n1,
 993                              AliAODVertex *vertexp1n1p2,
 994                              Double_t dcap1n1,Double_t dcap1n2,
 995                              Double_t dcap2n1,Double_t dcap2n2,
 996                              Bool_t &ok4Prong) const
 997 {
 998   // Make 4Prong candidates and check if they pass D0toKpipipi
 999   // reconstruction cuts
1000   // G.E.Bruno, R.Romita
1001
1002   ok4Prong=kFALSE;
1003   if(!secVert || !vertexp1n1 || !vertexp1n1p2) return 0x0;
1004
1005   Double_t px[4],py[4],pz[4],d0[4],d0err[4];//d0z[3];
1006
1007   AliESDtrack *postrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(0);
1008   AliESDtrack *negtrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(1);
1009   AliESDtrack *postrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(2);
1010   AliESDtrack *negtrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(3);
1011
1012   postrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
1013   negtrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
1014   postrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
1015   negtrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
1016
1017   Double_t momentum[3];
1018   postrack1->GetPxPyPz(momentum);
1019   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
1020   negtrack1->GetPxPyPz(momentum);
1021   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
1022   postrack2->GetPxPyPz(momentum);
1023   px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
1024   negtrack2->GetPxPyPz(momentum);
1025   px[3] = momentum[0]; py[3] = momentum[1]; pz[3] = momentum[2];
1026
1027   // invariant mass cut for rho or D0 (try to improve coding here..)
1028   Bool_t okMassCut=kFALSE;
1029   if(!okMassCut && fD0to4ProngsCuts[8]==0.){      //no PID, to be implemented with PID
1030     if(SelectInvMass(4,4,px,py,pz)) okMassCut=kTRUE;
1031   }
1032   if(!okMassCut) {
1033     //if(fDebug) printf(" candidate didn't pass mass cut\n");
1034     //printf(" candidate didn't pass mass cut\n");
1035     return 0x0;
1036   }
1037
1038   // primary vertex to be used by this candidate
1039   AliAODVertex *primVertexAOD  = PrimaryVertex(fourTrackArray,event);
1040   if(!primVertexAOD) return 0x0;
1041
1042   Double_t d0z0[2],covd0z0[3];
1043   postrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1044   d0[0]=d0z0[0];
1045   d0err[0] = TMath::Sqrt(covd0z0[0]);
1046   negtrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1047   d0[1]=d0z0[0];
1048   d0err[1] = TMath::Sqrt(covd0z0[0]);
1049   postrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1050   d0[2]=d0z0[0];
1051   d0err[2] = TMath::Sqrt(covd0z0[0]);
1052   negtrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
1053   d0[3]=d0z0[0];
1054   d0err[3] = TMath::Sqrt(covd0z0[0]);
1055
1056
1057   // create the object AliAODRecoDecayHF4Prong
1058   Double_t pos[3]; primVertexAOD->GetXYZ(pos);
1059   Double_t dca[6]={dcap1n1,0.,dcap1n2,dcap2n1,0.,dcap2n2};
1060   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]));
1061   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]));
1062   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]));
1063   Short_t charge=0;
1064   AliAODRecoDecayHF4Prong *the4Prong = new AliAODRecoDecayHF4Prong(secVert,px,py,pz,d0,d0err,dca,dist12,dist3,dist4,charge);
1065   the4Prong->SetOwnPrimaryVtx(primVertexAOD);
1066   UShort_t id[4]={(UShort_t)postrack1->GetID(),(UShort_t)negtrack1->GetID(),(UShort_t)postrack2->GetID(),(UShort_t)negtrack2->GetID()};
1067   the4Prong->SetProngIDs(4,id);
1068
1069   delete primVertexAOD; primVertexAOD=NULL;
1070
1071   Int_t checkD0,checkD0bar;
1072   ok4Prong=the4Prong->SelectD0(fD0to4ProngsCuts,checkD0,checkD0bar);
1073
1074   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
1075     the4Prong->UnsetOwnPrimaryVtx();
1076   }
1077
1078
1079   // get PID info from ESD
1080   Double_t esdpid0[5]={0.,0.,0.,0.,0.};
1081   if(postrack1->GetStatus()&AliESDtrack::kESDpid) postrack1->GetESDpid(esdpid0);
1082   Double_t esdpid1[5]={0.,0.,0.,0.,0.};
1083   if(negtrack1->GetStatus()&AliESDtrack::kESDpid) negtrack1->GetESDpid(esdpid1);
1084   Double_t esdpid2[5]={0.,0.,0.,0.,0.};
1085   if(postrack2->GetStatus()&AliESDtrack::kESDpid) postrack2->GetESDpid(esdpid2);
1086   Double_t esdpid3[5]={0.,0.,0.,0.,0.};
1087   if(negtrack2->GetStatus()&AliESDtrack::kESDpid) negtrack2->GetESDpid(esdpid3);
1088
1089   Double_t esdpid[20];
1090   for(Int_t i=0;i<5;i++) {
1091     esdpid[i]    = esdpid0[i];
1092     esdpid[5+i]  = esdpid1[i];
1093     esdpid[10+i] = esdpid2[i];
1094     esdpid[15+i] = esdpid3[i];
1095   }
1096   the4Prong->SetPID(4,esdpid);
1097
1098   return the4Prong;
1099 }
1100 //-----------------------------------------------------------------------------
1101 AliAODVertex* AliAnalysisVertexingHF::PrimaryVertex(TObjArray *trkArray,
1102                                                     AliVEvent *event) const
1103 {
1104   // Returns primary vertex to be used for this candidate
1105
1106   AliESDVertex *vertexESD = 0;
1107   AliAODVertex *vertexAOD = 0;
1108
1109
1110   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
1111     // primary vertex from the input event
1112
1113     vertexESD = new AliESDVertex(*fV1);
1114
1115   } else {
1116     // primary vertex specific to this candidate
1117
1118     Int_t nTrks = trkArray->GetEntriesFast();
1119     AliVertexerTracks *vertexer = new AliVertexerTracks(event->GetMagneticField());
1120
1121     if(fRecoPrimVtxSkippingTrks) {
1122       // recalculating the vertex
1123
1124       if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraint")) {
1125         Float_t diamondcovxy[3];
1126         event->GetDiamondCovXY(diamondcovxy);
1127         Double_t pos[3]={event->GetDiamondX(),event->GetDiamondY(),0.};
1128         Double_t cov[6]={diamondcovxy[0],diamondcovxy[1],diamondcovxy[2],0.,0.,10.};
1129         AliESDVertex *diamond = new AliESDVertex(pos,cov,1.,1);
1130         vertexer->SetVtxStart(diamond);
1131         delete diamond; diamond=NULL;
1132         if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraintOnlyFitter"))
1133           vertexer->SetOnlyFitter();
1134       }
1135       Int_t skipped[1000];
1136       Int_t nTrksToSkip=0,id;
1137       AliExternalTrackParam *t = 0;
1138       for(Int_t i=0; i<nTrks; i++) {
1139         t = (AliExternalTrackParam*)trkArray->UncheckedAt(i);
1140         id = (Int_t)t->GetID();
1141         if(id<0) continue;
1142         skipped[nTrksToSkip++] = id;
1143       }
1144       // TEMPORARY FIX
1145       // For AOD, skip also tracks without covariance matrix
1146       if(fInputAOD) {
1147         Double_t covtest[21];
1148         for(Int_t j=0; j<event->GetNumberOfTracks(); j++) {
1149           AliVTrack *vtrack = (AliVTrack*)event->GetTrack(j);
1150           if(!vtrack->GetCovarianceXYZPxPyPz(covtest)) {
1151             id = (Int_t)t->GetID();
1152             if(id<0) continue;
1153             skipped[nTrksToSkip++] = id;
1154           }
1155         }
1156       }
1157       //
1158       vertexer->SetSkipTracks(nTrksToSkip,skipped);
1159       vertexESD = (AliESDVertex*)vertexer->FindPrimaryVertex(event);
1160
1161     } else if(fRmTrksFromPrimVtx) {
1162       // removing the prongs tracks
1163
1164       TObjArray rmArray(nTrks);
1165       UShort_t *rmId = new UShort_t[nTrks];
1166       AliESDtrack *esdTrack = 0;
1167       AliESDtrack *t = 0;
1168       for(Int_t i=0; i<nTrks; i++) {
1169         t = (AliESDtrack*)trkArray->UncheckedAt(i);
1170         esdTrack = new AliESDtrack(*t);
1171         rmArray.AddLast(esdTrack);
1172         if(esdTrack->GetID()>=0) {
1173           rmId[i]=(UShort_t)esdTrack->GetID();
1174         } else {
1175           rmId[i]=9999;
1176         }
1177       }
1178       Float_t diamondxy[2]={event->GetDiamondX(),event->GetDiamondY()};
1179       vertexESD = vertexer->RemoveTracksFromVertex(fV1,&rmArray,rmId,diamondxy);
1180       delete [] rmId; rmId=NULL;
1181       rmArray.Delete();
1182
1183     }
1184
1185     if(!vertexESD) return vertexAOD;
1186     if(vertexESD->GetNContributors()<=0) {
1187       AliDebug(2,"vertexing failed");
1188       delete vertexESD; vertexESD=NULL;
1189       return vertexAOD;
1190     }
1191
1192     delete vertexer; vertexer=NULL;
1193
1194   }
1195
1196   // convert to AliAODVertex
1197   Double_t pos[3],cov[6],chi2perNDF;
1198   vertexESD->GetXYZ(pos); // position
1199   vertexESD->GetCovMatrix(cov); //covariance matrix
1200   chi2perNDF = vertexESD->GetChi2toNDF();
1201   delete vertexESD; vertexESD=NULL;
1202
1203   vertexAOD = new AliAODVertex(pos,cov,chi2perNDF);
1204
1205   return vertexAOD;
1206 }
1207 //-----------------------------------------------------------------------------
1208 void AliAnalysisVertexingHF::PrintStatus() const {
1209   // Print parameters being used
1210
1211   //printf("Preselections:\n");
1212   //   fTrackFilter->Dump();
1213   if(fSecVtxWithKF) {
1214     printf("Secondary vertex with Kalman filter package (AliKFParticle)\n");
1215   } else {
1216     printf("Secondary vertex with AliVertexerTracks\n");
1217   }
1218   if(fRecoPrimVtxSkippingTrks) printf("RecoPrimVtxSkippingTrks\n");
1219   if(fRmTrksFromPrimVtx) printf("RmTrksFromPrimVtx\n");
1220   if(fD0toKpi) {
1221     printf("Reconstruct D0->Kpi candidates with cuts:\n");
1222     printf("    |M-MD0| [GeV]    < %f\n",fD0toKpiCuts[0]);
1223     printf("    dca    [cm]  < %f\n",fD0toKpiCuts[1]);
1224     printf("    cosThetaStar     < %f\n",fD0toKpiCuts[2]);
1225     printf("    pTK     [GeV/c]    > %f\n",fD0toKpiCuts[3]);
1226     printf("    pTpi    [GeV/c]    > %f\n",fD0toKpiCuts[4]);
1227     printf("    |d0K|  [cm]  < %f\n",fD0toKpiCuts[5]);
1228     printf("    |d0pi| [cm]  < %f\n",fD0toKpiCuts[6]);
1229     printf("    d0d0  [cm^2] < %f\n",fD0toKpiCuts[7]);
1230     printf("    cosThetaPoint    > %f\n",fD0toKpiCuts[8]);
1231   }
1232   if(fDstar) {
1233     if(fFindVertexForDstar) {
1234       printf("    Reconstruct a secondary vertex for the D*\n");
1235     } else {
1236       printf("    Assume the D* comes from the primary vertex\n");
1237     }
1238     printf("    |M-MD*| [GeV]    < %f\n",fDstarCuts[0]);
1239     printf("    |M_Kpipi-M_Kpi-(MD*-MD0)| [GeV]  < %f\n",fDstarCuts[1]);
1240     printf("    pTpisoft [GeV/c]    > %f\n",fDstarCuts[2]);
1241     printf("    pTpisoft [GeV/c]    < %f\n",fDstarCuts[3]);
1242     printf("    Theta(pisoft,D0plane) < %f\n",fDstarCuts[4]);
1243     printf("Reconstruct D*->D0pi candidates with cuts:\n");
1244     printf("   D0 from D* cuts:\n");
1245     printf("    |M-MD0| [GeV]    < %f\n",fD0fromDstarCuts[0]);
1246     printf("    dca    [cm]  < %f\n",fD0fromDstarCuts[1]);
1247     printf("    cosThetaStar     < %f\n",fD0fromDstarCuts[2]);
1248     printf("    pTK     [GeV/c]    > %f\n",fD0fromDstarCuts[3]);
1249     printf("    pTpi    [GeV/c]    > %f\n",fD0fromDstarCuts[4]);
1250     printf("    |d0K|  [cm]  < %f\n",fD0fromDstarCuts[5]);
1251     printf("    |d0pi| [cm]  < %f\n",fD0fromDstarCuts[6]);
1252     printf("    d0d0  [cm^2] < %f\n",fD0fromDstarCuts[7]);
1253     printf("    cosThetaPoint    > %f\n",fD0fromDstarCuts[8]);
1254   }
1255   if(fJPSItoEle) {
1256     printf("Reconstruct J/psi from B candidates with cuts:\n");
1257     printf("    |M-MJPSI| [GeV]    < %f\n",fBtoJPSICuts[0]);
1258     printf("    dca    [cm]  < %f\n",fBtoJPSICuts[1]);
1259     printf("    cosThetaStar     < %f\n",fBtoJPSICuts[2]);
1260     printf("    pTP     [GeV/c]    > %f\n",fBtoJPSICuts[3]);
1261     printf("    pTN    [GeV/c]    > %f\n",fBtoJPSICuts[4]);
1262     printf("    |d0P|  [cm]  < %f\n",fBtoJPSICuts[5]);
1263     printf("    |d0N| [cm]  < %f\n",fBtoJPSICuts[6]);
1264     printf("    d0d0  [cm^2] < %f\n",fBtoJPSICuts[7]);
1265     printf("    cosThetaPoint    > %f\n",fBtoJPSICuts[8]);
1266   }
1267   if(f3Prong) {
1268     printf("Reconstruct 3 prong candidates.\n");
1269     printf("  D+->Kpipi cuts:\n");
1270     printf("    |M-MD+| [GeV]    < %f\n",fDplusCuts[0]);
1271     printf("    pTK     [GeV/c]    > %f\n",fDplusCuts[1]);
1272     printf("    pTPi    [GeV/c]    > %f\n",fDplusCuts[2]);
1273     printf("    |d0K|  [cm]  > %f\n",fDplusCuts[3]);
1274     printf("    |d0Pi| [cm]  > %f\n",fDplusCuts[4]);
1275     printf("    dist12    [cm]  < %f\n",fDplusCuts[5]);
1276     printf("    sigmavert [cm]   < %f\n",fDplusCuts[6]);
1277     printf("    dist prim-sec [cm] > %f\n",fDplusCuts[7]);
1278     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fDplusCuts[8]);
1279     printf("    cosThetaPoint    > %f\n",fDplusCuts[9]);
1280     printf("    Sum d0^2 [cm^2]  > %f\n",fDplusCuts[10]);
1281     printf("    dca cut [cm]  < %f\n",fDplusCuts[11]);
1282     printf("  Ds->KKpi cuts:\n");
1283     printf("    |M-MDs| [GeV]    < %f\n",fDsCuts[0]);
1284     printf("    pTK     [GeV/c]    > %f\n",fDsCuts[1]);
1285     printf("    pTPi    [GeV/c]    > %f\n",fDsCuts[2]);
1286     printf("    |d0K|  [cm]  > %f\n",fDsCuts[3]);
1287     printf("    |d0Pi| [cm]  > %f\n",fDsCuts[4]);
1288     printf("    dist12    [cm]  < %f\n",fDsCuts[5]);
1289     printf("    sigmavert [cm]   < %f\n",fDsCuts[6]);
1290     printf("    dist prim-sec [cm] > %f\n",fDsCuts[7]);
1291     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fDsCuts[8]);
1292     printf("    cosThetaPoint    > %f\n",fDsCuts[9]);
1293     printf("    Sum d0^2 [cm^2]  > %f\n",fDsCuts[10]);
1294     printf("    dca cut [cm]  < %f\n",fDsCuts[11]);
1295     printf("    Inv. Mass  phi/K0* [GeV]  < %f\n",fDsCuts[12]);
1296     printf("  Lc->pKpi cuts:\n");
1297     printf("    |M-MLc| [GeV]    < %f\n",fLcCuts[0]);
1298     printf("    pTP     [GeV/c]    > %f\n",fLcCuts[1]);
1299     printf("    pTPi and pTK [GeV/c]    > %f\n",fLcCuts[2]);
1300     printf("    |d0P|  [cm]  > %f\n",fLcCuts[3]);
1301     printf("    |d0Pi| and |d0K| [cm]  > %f\n",fLcCuts[4]);
1302     printf("    dist12    [cm]  < %f\n",fLcCuts[5]);
1303     printf("    sigmavert [cm]   < %f\n",fLcCuts[6]);
1304     printf("    dist prim-sec [cm] > %f\n",fLcCuts[7]);
1305     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fLcCuts[8]);
1306     printf("    cosThetaPoint    > %f\n",fLcCuts[9]);
1307     printf("    Sum d0^2 [cm^2]  > %f\n",fLcCuts[10]);
1308     printf("    dca cut [cm]  < %f\n",fLcCuts[11]);
1309   }
1310
1311   return;
1312 }
1313 //-----------------------------------------------------------------------------
1314 AliAODVertex* AliAnalysisVertexingHF::ReconstructSecondaryVertex(TObjArray *trkArray,
1315                                                                  Double_t &dispersion,Bool_t useTRefArray) const
1316 {
1317   // Secondary vertex reconstruction with AliVertexerTracks or AliKFParticle
1318
1319   AliESDVertex *vertexESD = 0;
1320   AliAODVertex *vertexAOD = 0;
1321
1322   if(!fSecVtxWithKF) { // AliVertexerTracks
1323
1324     AliVertexerTracks *vertexer = new AliVertexerTracks(fBzkG);
1325     vertexer->SetVtxStart(fV1);
1326     vertexESD = (AliESDVertex*)vertexer->VertexForSelectedESDTracks(trkArray);
1327     delete vertexer; vertexer=NULL;
1328
1329     if(!vertexESD) return vertexAOD;
1330
1331     if(vertexESD->GetNContributors()!=trkArray->GetEntriesFast()) {
1332       AliDebug(2,"vertexing failed");
1333       delete vertexESD; vertexESD=NULL;
1334       return vertexAOD;
1335     }
1336
1337   } else { // Kalman Filter vertexer (AliKFParticle)
1338
1339     AliKFParticle::SetField(fBzkG);
1340
1341     AliKFVertex vertexKF;
1342
1343     Int_t nTrks = trkArray->GetEntriesFast();
1344     for(Int_t i=0; i<nTrks; i++) {
1345       AliESDtrack *esdTrack = (AliESDtrack*)trkArray->At(i);
1346       AliKFParticle daughterKF(*esdTrack,211);
1347       vertexKF.AddDaughter(daughterKF);
1348     }
1349     vertexESD = new AliESDVertex(vertexKF.Parameters(),
1350                                  vertexKF.CovarianceMatrix(),
1351                                  vertexKF.GetChi2(),
1352                                  vertexKF.GetNContributors());
1353
1354   }
1355
1356   // convert to AliAODVertex
1357   Double_t pos[3],cov[6],chi2perNDF;
1358   vertexESD->GetXYZ(pos); // position
1359   vertexESD->GetCovMatrix(cov); //covariance matrix
1360   chi2perNDF = vertexESD->GetChi2toNDF();
1361   dispersion = vertexESD->GetDispersion();
1362   delete vertexESD; vertexESD=NULL;
1363
1364   Int_t nprongs= (useTRefArray ? 0 : trkArray->GetEntriesFast());
1365   vertexAOD = new AliAODVertex(pos,cov,chi2perNDF,0x0,-1,AliAODVertex::kUndef,nprongs);
1366
1367   return vertexAOD;
1368 }
1369 //-----------------------------------------------------------------------------
1370 Bool_t AliAnalysisVertexingHF::SelectInvMass(Int_t decay,
1371                                              Int_t nprongs,
1372                                              Double_t *px,
1373                                              Double_t *py,
1374                                              Double_t *pz) const {
1375   // Check invariant mass cut
1376
1377   Short_t dummycharge=0;
1378   Double_t *dummyd0 = new Double_t[nprongs];
1379   for(Int_t ip=0;ip<nprongs;ip++) dummyd0[ip]=0.;
1380   AliAODRecoDecay *rd = new AliAODRecoDecay(0x0,nprongs,dummycharge,px,py,pz,dummyd0);
1381   delete [] dummyd0; dummyd0=NULL;
1382
1383   UInt_t pdg2[2],pdg3[3],pdg4[4];
1384   Double_t mPDG,minv;
1385
1386   Bool_t retval=kFALSE;
1387   switch (decay)
1388     {
1389     case 0:                  // D0->Kpi
1390       pdg2[0]=211; pdg2[1]=321;
1391       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1392       minv = rd->InvMass(nprongs,pdg2);
1393       if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
1394       pdg2[0]=321; pdg2[1]=211;
1395       minv = rd->InvMass(nprongs,pdg2);
1396       if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
1397       break;
1398     case 1:                  // JPSI->ee
1399       pdg2[0]=11; pdg2[1]=11;
1400       mPDG=TDatabasePDG::Instance()->GetParticle(443)->Mass();
1401       minv = rd->InvMass(nprongs,pdg2);
1402       if(TMath::Abs(minv-mPDG)<fBtoJPSICuts[0]) retval=kTRUE;
1403       break;
1404     case 2:                  // D+->Kpipi
1405       pdg3[0]=211; pdg3[1]=321; pdg3[2]=211;
1406       mPDG=TDatabasePDG::Instance()->GetParticle(411)->Mass();
1407       minv = rd->InvMass(nprongs,pdg3);
1408       if(TMath::Abs(minv-mPDG)<fDplusCuts[0]) retval=kTRUE;
1409                             // Ds+->KKpi
1410       pdg3[0]=321; pdg3[1]=321; pdg3[2]=211;
1411       mPDG=TDatabasePDG::Instance()->GetParticle(431)->Mass();
1412       minv = rd->InvMass(nprongs,pdg3);
1413       if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
1414       pdg3[0]=211; pdg3[1]=321; pdg3[2]=321;
1415       minv = rd->InvMass(nprongs,pdg3);
1416       if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
1417                             // Lc->pKpi
1418       pdg3[0]=2212; pdg3[1]=321; pdg3[2]=211;
1419       mPDG=TDatabasePDG::Instance()->GetParticle(4122)->Mass();
1420       minv = rd->InvMass(nprongs,pdg3);
1421       if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
1422       pdg3[0]=211; pdg3[1]=321; pdg3[2]=2212;
1423       minv = rd->InvMass(nprongs,pdg3);
1424       if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
1425       break;
1426     case 3:                  // D*->D0pi
1427       pdg2[0]=421; pdg2[1]=211;
1428       mPDG=TDatabasePDG::Instance()->GetParticle(413)->Mass();
1429       minv = rd->InvMass(nprongs,pdg2);
1430       if(TMath::Abs(minv-mPDG)<fDstarCuts[0]) retval=kTRUE;
1431       break;
1432     case 4:                 // D0->K3pi without PID
1433       pdg4[0]=321; pdg4[1]=211; 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])
1437         retval=kTRUE;
1438       pdg4[0]=211; pdg4[1]=321; pdg4[2]=211; pdg4[3]=211;
1439       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1440       minv = rd->InvMass(nprongs,pdg4);
1441       if(TMath::Abs(minv-mPDG)<fD0to4ProngsCuts[0]) retval=kTRUE;
1442       pdg4[0]=211; pdg4[1]=211; pdg4[2]=321; pdg4[3]=211;
1443       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1444       minv = rd->InvMass(nprongs,pdg4);
1445       if(TMath::Abs(minv-mPDG)<fD0to4ProngsCuts[0]) retval=kTRUE;
1446       pdg4[0]=211; pdg4[1]=211; pdg4[2]=211; pdg4[3]=321;
1447       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1448       minv = rd->InvMass(nprongs,pdg4);
1449       if(TMath::Abs(minv-mPDG)<fD0to4ProngsCuts[0]) retval=kTRUE;
1450       break;
1451     default:
1452       printf("SelectInvMass(): wrong decay selection\n");
1453       break;
1454     }
1455
1456   delete rd; rd=NULL;
1457
1458   return retval;
1459 }
1460 //-----------------------------------------------------------------------------
1461 void AliAnalysisVertexingHF::SelectTracksAndCopyVertex(AliVEvent *event,
1462                                    TObjArray &seleTrksArray,Int_t &nSeleTrks,
1463                                                        UChar_t *seleFlags)
1464 {
1465   // Apply single-track preselection.
1466   // Fill a TObjArray with selected tracks (for displaced vertices or
1467   // soft pion from D*). Selection flag stored in seleFlags.
1468   // Create the AliESDVertex object (convert from AliAODVertex if necessary)
1469   // In case of AOD input, also fill fAODMap for track index<->ID
1470
1471   const AliVVertex *vprimary = event->GetPrimaryVertex();
1472
1473   if(fV1) { delete fV1; fV1=NULL; }
1474   if(fAODMap) { delete [] fAODMap; fAODMap=NULL; }
1475
1476   Int_t nindices=0;
1477   UShort_t *indices = 0;
1478   Double_t pos[3],cov[6];
1479
1480   if(!fInputAOD) { // ESD
1481     fV1 = new AliESDVertex(*((AliESDVertex*)vprimary));
1482   } else {         // AOD
1483     vprimary->GetXYZ(pos);
1484     vprimary->GetCovarianceMatrix(cov);
1485     fV1 = new AliESDVertex(pos,cov,100.,100,vprimary->GetName());
1486     indices = new UShort_t[event->GetNumberOfTracks()];
1487     fAODMap = new Int_t[100000];
1488   }
1489
1490
1491   Int_t entries = (Int_t)event->GetNumberOfTracks();
1492   Bool_t okDisplaced=kFALSE,okSoftPi=kFALSE;
1493   nSeleTrks=0;
1494
1495   // transfer ITS tracks from event to arrays
1496   for(Int_t i=0; i<entries; i++) {
1497     AliVTrack *track = (AliVTrack*)event->GetTrack(i);
1498
1499     // TEMPORARY: check that the cov matrix is there
1500     Double_t covtest[21];
1501     if(!track->GetCovarianceXYZPxPyPz(covtest)) continue;
1502     //
1503
1504     if(fInputAOD) {
1505       AliAODTrack *aodt = (AliAODTrack*)track;
1506       if(aodt->GetUsedForPrimVtxFit()) {
1507         indices[nindices]=aodt->GetID(); nindices++;
1508       }
1509       fAODMap[(Int_t)aodt->GetID()] = i;
1510     }
1511
1512     AliESDtrack *esdt = 0;
1513
1514     if(!fInputAOD) {
1515       esdt = (AliESDtrack*)track;
1516     } else {
1517       esdt = new AliESDtrack(track);
1518     }
1519
1520     // single track selection
1521     okDisplaced=kFALSE; okSoftPi=kFALSE;
1522     if(SingleTrkCuts(esdt,okDisplaced,okSoftPi)) {
1523       seleTrksArray.AddLast(esdt);
1524       seleFlags[nSeleTrks]=0;
1525       if(okDisplaced) SETBIT(seleFlags[nSeleTrks],kBitDispl);
1526       if(okSoftPi)    SETBIT(seleFlags[nSeleTrks],kBitSoftPi);
1527       nSeleTrks++;
1528     } else {
1529       if(fInputAOD) delete esdt;
1530       esdt = NULL;
1531       continue;
1532     }
1533
1534   } // end loop on tracks
1535
1536   // primary vertex from AOD
1537   if(fInputAOD) {
1538     delete fV1; fV1=NULL;
1539     vprimary->GetXYZ(pos);
1540     vprimary->GetCovarianceMatrix(cov);
1541     Double_t chi2toNDF = vprimary->GetChi2perNDF();
1542     Int_t ncontr=nindices;
1543     if(!strcmp(vprimary->GetTitle(),"VertexerTracksWithContraint")) ncontr += 1;
1544     Double_t chi2=chi2toNDF*(2.*(Double_t)ncontr-3.);
1545     fV1 = new AliESDVertex(pos,cov,chi2,ncontr,vprimary->GetName());
1546     fV1->SetTitle(vprimary->GetTitle());
1547     fV1->SetIndices(nindices,indices);
1548   }
1549   if(indices) { delete [] indices; indices=NULL; }
1550
1551
1552   return;
1553 }
1554 //-----------------------------------------------------------------------------
1555 void AliAnalysisVertexingHF::SetD0toKpiCuts(Double_t cut0,Double_t cut1,
1556                                    Double_t cut2,Double_t cut3,Double_t cut4,
1557                                    Double_t cut5,Double_t cut6,
1558                                    Double_t cut7,Double_t cut8)
1559 {
1560   // Set the cuts for D0 selection
1561   fD0toKpiCuts[0] = cut0;
1562   fD0toKpiCuts[1] = cut1;
1563   fD0toKpiCuts[2] = cut2;
1564   fD0toKpiCuts[3] = cut3;
1565   fD0toKpiCuts[4] = cut4;
1566   fD0toKpiCuts[5] = cut5;
1567   fD0toKpiCuts[6] = cut6;
1568   fD0toKpiCuts[7] = cut7;
1569   fD0toKpiCuts[8] = cut8;
1570
1571   return;
1572 }
1573 //-----------------------------------------------------------------------------
1574 void AliAnalysisVertexingHF::SetD0toKpiCuts(const Double_t cuts[9])
1575 {
1576   // Set the cuts for D0 selection
1577
1578   for(Int_t i=0; i<9; i++) fD0toKpiCuts[i] = cuts[i];
1579
1580   return;
1581 }
1582 //-----------------------------------------------------------------------------
1583 void AliAnalysisVertexingHF::SetD0fromDstarCuts(Double_t cut0,Double_t cut1,
1584                                    Double_t cut2,Double_t cut3,Double_t cut4,
1585                                    Double_t cut5,Double_t cut6,
1586                                    Double_t cut7,Double_t cut8)
1587 {
1588   // Set the cuts for D0 from D* selection
1589   fD0fromDstarCuts[0] = cut0;
1590   fD0fromDstarCuts[1] = cut1;
1591   fD0fromDstarCuts[2] = cut2;
1592   fD0fromDstarCuts[3] = cut3;
1593   fD0fromDstarCuts[4] = cut4;
1594   fD0fromDstarCuts[5] = cut5;
1595   fD0fromDstarCuts[6] = cut6;
1596   fD0fromDstarCuts[7] = cut7;
1597   fD0fromDstarCuts[8] = cut8;
1598
1599   return;
1600 }
1601 //-----------------------------------------------------------------------------
1602 void AliAnalysisVertexingHF::SetD0fromDstarCuts(const Double_t cuts[9])
1603 {
1604   // Set the cuts for D0 from D* selection
1605
1606   for(Int_t i=0; i<9; i++) fD0fromDstarCuts[i] = cuts[i];
1607
1608   return;
1609 }
1610 //-----------------------------------------------------------------------------
1611 void AliAnalysisVertexingHF::SetDstarCuts(Double_t cut0,Double_t cut1,
1612                                           Double_t cut2,Double_t cut3,
1613                                           Double_t cut4)
1614 {
1615   // Set the cuts for D* selection
1616   fDstarCuts[0] = cut0;
1617   fDstarCuts[1] = cut1;
1618   fDstarCuts[2] = cut2;
1619   fDstarCuts[3] = cut3;
1620   fDstarCuts[4] = cut4;
1621
1622   return;
1623 }
1624 //-----------------------------------------------------------------------------
1625 void AliAnalysisVertexingHF::SetDstarCuts(const Double_t cuts[5])
1626 {
1627   // Set the cuts for D* selection
1628
1629   for(Int_t i=0; i<5; i++) fDstarCuts[i] = cuts[i];
1630
1631   return;
1632 }
1633 //-----------------------------------------------------------------------------
1634 void AliAnalysisVertexingHF::SetBtoJPSICuts(Double_t cut0,Double_t cut1,
1635                                    Double_t cut2,Double_t cut3,Double_t cut4,
1636                                    Double_t cut5,Double_t cut6,
1637                                    Double_t cut7,Double_t cut8)
1638 {
1639   // Set the cuts for J/psi from B selection
1640   fBtoJPSICuts[0] = cut0;
1641   fBtoJPSICuts[1] = cut1;
1642   fBtoJPSICuts[2] = cut2;
1643   fBtoJPSICuts[3] = cut3;
1644   fBtoJPSICuts[4] = cut4;
1645   fBtoJPSICuts[5] = cut5;
1646   fBtoJPSICuts[6] = cut6;
1647   fBtoJPSICuts[7] = cut7;
1648   fBtoJPSICuts[8] = cut8;
1649
1650   return;
1651 }
1652 //-----------------------------------------------------------------------------
1653 void AliAnalysisVertexingHF::SetBtoJPSICuts(const Double_t cuts[9])
1654 {
1655   // Set the cuts for J/psi from B selection
1656
1657   for(Int_t i=0; i<9; i++) fBtoJPSICuts[i] = cuts[i];
1658
1659   return;
1660 }
1661 //-----------------------------------------------------------------------------
1662 void AliAnalysisVertexingHF::SetDplusCuts(Double_t cut0,Double_t cut1,
1663                                    Double_t cut2,Double_t cut3,Double_t cut4,
1664                                    Double_t cut5,Double_t cut6,
1665                                    Double_t cut7,Double_t cut8,
1666                                    Double_t cut9,Double_t cut10,Double_t cut11)
1667 {
1668   // Set the cuts for Dplus->Kpipi selection
1669   fDplusCuts[0] = cut0;
1670   fDplusCuts[1] = cut1;
1671   fDplusCuts[2] = cut2;
1672   fDplusCuts[3] = cut3;
1673   fDplusCuts[4] = cut4;
1674   fDplusCuts[5] = cut5;
1675   fDplusCuts[6] = cut6;
1676   fDplusCuts[7] = cut7;
1677   fDplusCuts[8] = cut8;
1678   fDplusCuts[9] = cut9;
1679   fDplusCuts[10] = cut10;
1680   fDplusCuts[11] = cut11;
1681
1682   return;
1683 }
1684 //-----------------------------------------------------------------------------
1685 void AliAnalysisVertexingHF::SetDplusCuts(const Double_t cuts[12])
1686 {
1687   // Set the cuts for Dplus->Kpipi selection
1688
1689   for(Int_t i=0; i<12; i++) fDplusCuts[i] = cuts[i];
1690
1691   return;
1692 }
1693 //-----------------------------------------------------------------------------
1694 void AliAnalysisVertexingHF::SetDsCuts(Double_t cut0,Double_t cut1,
1695                                    Double_t cut2,Double_t cut3,Double_t cut4,
1696                                    Double_t cut5,Double_t cut6,
1697                                    Double_t cut7,Double_t cut8,
1698                                    Double_t cut9,Double_t cut10,
1699                                    Double_t cut11,Double_t cut12)
1700 {
1701   // Set the cuts for Ds->KKpi selection
1702   fDsCuts[0] = cut0;
1703   fDsCuts[1] = cut1;
1704   fDsCuts[2] = cut2;
1705   fDsCuts[3] = cut3;
1706   fDsCuts[4] = cut4;
1707   fDsCuts[5] = cut5;
1708   fDsCuts[6] = cut6;
1709   fDsCuts[7] = cut7;
1710   fDsCuts[8] = cut8;
1711   fDsCuts[9] = cut9;
1712   fDsCuts[10] = cut10;
1713   fDsCuts[11] = cut11;
1714   fDsCuts[12] = cut12;
1715
1716   return;
1717 }
1718 //-----------------------------------------------------------------------------
1719 void AliAnalysisVertexingHF::SetDsCuts(const Double_t cuts[13])
1720 {
1721   // Set the cuts for Ds->KKpi selection
1722
1723   for(Int_t i=0; i<13; i++) fDsCuts[i] = cuts[i];
1724
1725   return;
1726 }
1727 //-----------------------------------------------------------------------------
1728 void AliAnalysisVertexingHF::SetLcCuts(Double_t cut0,Double_t cut1,
1729                                    Double_t cut2,Double_t cut3,Double_t cut4,
1730                                    Double_t cut5,Double_t cut6,
1731                                    Double_t cut7,Double_t cut8,
1732                                    Double_t cut9,Double_t cut10,Double_t cut11)
1733 {
1734   // Set the cuts for Lc->pKpi selection
1735   fLcCuts[0] = cut0;
1736   fLcCuts[1] = cut1;
1737   fLcCuts[2] = cut2;
1738   fLcCuts[3] = cut3;
1739   fLcCuts[4] = cut4;
1740   fLcCuts[5] = cut5;
1741   fLcCuts[6] = cut6;
1742   fLcCuts[7] = cut7;
1743   fLcCuts[8] = cut8;
1744   fLcCuts[9] = cut9;
1745   fLcCuts[10] = cut10;
1746   fLcCuts[11] = cut11;
1747
1748   return;
1749 }
1750 //-----------------------------------------------------------------------------
1751 void AliAnalysisVertexingHF::SetLcCuts(const Double_t cuts[12])
1752 {
1753   // Set the cuts for Lc->pKpi selection
1754
1755   for(Int_t i=0; i<12; i++) fLcCuts[i] = cuts[i];
1756
1757   return;
1758 }
1759 //-----------------------------------------------------------------------------
1760 void AliAnalysisVertexingHF::SetD0to4ProngsCuts(Double_t cut0,Double_t cut1,
1761                                    Double_t cut2,Double_t cut3,Double_t cut4,
1762                                    Double_t cut5,Double_t cut6,
1763                                    Double_t cut7,Double_t cut8)
1764 {
1765   // Set the cuts for D0->Kpipipi selection
1766
1767   fD0to4ProngsCuts[0] = cut0;
1768   fD0to4ProngsCuts[1] = cut1;
1769   fD0to4ProngsCuts[2] = cut2;
1770   fD0to4ProngsCuts[3] = cut3;
1771   fD0to4ProngsCuts[4] = cut4;
1772   fD0to4ProngsCuts[5] = cut5;
1773   fD0to4ProngsCuts[6] = cut6;
1774   fD0to4ProngsCuts[7] = cut7;
1775   fD0to4ProngsCuts[8] = cut8;
1776
1777   return;
1778 }
1779 //-----------------------------------------------------------------------------
1780 void AliAnalysisVertexingHF::SetD0to4ProngsCuts(const Double_t cuts[9])
1781 {
1782   // Set the cuts for D0->Kpipipi selection
1783
1784   for(Int_t i=0; i<9; i++) fD0to4ProngsCuts[i] = cuts[i];
1785
1786   return;
1787 }
1788 //-----------------------------------------------------------------------------
1789 Bool_t AliAnalysisVertexingHF::SingleTrkCuts(AliESDtrack *trk,
1790                                              Bool_t &okDisplaced,Bool_t &okSoftPi) const
1791 {
1792   // Check if track passes some kinematical cuts
1793
1794   // this is needed to store the impact parameters
1795   trk->RelateToVertex(fV1,fBzkG,kVeryBig);
1796
1797   UInt_t selectInfo;
1798   //
1799   // Track selection, displaced tracks
1800   selectInfo = 0;
1801   if(fTrackFilter) {
1802     selectInfo = fTrackFilter->IsSelected(trk);
1803   }
1804   if(selectInfo) okDisplaced=kTRUE;
1805   // Track selection, soft pions
1806   selectInfo = 0;
1807   if(fDstar && fTrackFilterSoftPi) {
1808     selectInfo = fTrackFilterSoftPi->IsSelected(trk);
1809   }
1810   if(selectInfo) okSoftPi=kTRUE;
1811
1812   if(okDisplaced || okSoftPi) return kTRUE;
1813
1814   return kFALSE;
1815 }
1816 //-----------------------------------------------------------------------------