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   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
   9  * without fee, provided that the above copyright notice appears in all   *
  10  * copies and that both the copyright notice and this permission notice   *
  11  * appear in the supporting documentation. The authors make no claims     *
  12  * about the suitability of this software for any purpose. It is          *
  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 //  Origin: E.Bruna, G.E.Bruno, A.Dainese, F.Prino, R.Romita
  24 //  Contact: andrea.dainese@lnl.infn.it
  25 //----------------------------------------------------------------------------
  26 #include <TFile.h>
  27 #include <TDatabasePDG.h>
  28 #include <TString.h>
  29 #include "AliLog.h"
  30 #include "AliVEvent.h"
  31 #include "AliVVertex.h"
  32 #include "AliVTrack.h"
  33 #include "AliVertexerTracks.h"
  34 #include "AliKFParticle.h"
  35 #include "AliESDEvent.h"
  36 #include "AliESDVertex.h"
  37 #include "AliESDtrack.h"
  38 #include "AliAODEvent.h"
  39 #include "AliAODRecoDecay.h"
  40 #include "AliAODRecoDecayHF.h"
  41 #include "AliAODRecoDecayHF2Prong.h"
  42 #include "AliAODRecoDecayHF3Prong.h"
  43 #include "AliAODRecoDecayHF4Prong.h"
  44 #include "AliAnalysisVertexingHF.h"
  45
  46 ClassImp(AliAnalysisVertexingHF)
  47
  48 //----------------------------------------------------------------------------
  49 AliAnalysisVertexingHF::AliAnalysisVertexingHF():
  50 fInputAOD(kFALSE),
  51 fAODMap(0),
  52 fBzkG(0.),
  53 fSecVtxWithKF(kFALSE),
  54 fRecoPrimVtxSkippingTrks(kFALSE),
  55 fRmTrksFromPrimVtx(kFALSE),
  56 fV1(0x0),
  57 fD0toKpi(kTRUE),
  58 fJPSItoEle(kTRUE),
  59 f3Prong(kTRUE),
  60 f4Prong(kTRUE),
  61 fITSrefit(kFALSE),
  62 fBothSPD(kTRUE),
  63 fMinITSCls(5),
  64 fMinPtCut(0.),
  65 fMind0rphiCut(0.)
  66 {
  67   // Default constructor
  68
  69   SetD0toKpiCuts();
  70   SetBtoJPSICuts();
  71   SetDplusCuts();
  72   SetDsCuts();
  73   SetLcCuts();
  74 }
  75 //--------------------------------------------------------------------------
  76 AliAnalysisVertexingHF::AliAnalysisVertexingHF(const AliAnalysisVertexingHF &source) :
  77 TNamed(source),
  78 fInputAOD(source.fInputAOD),
  79 fAODMap(source.fAODMap),
  80 fBzkG(source.fBzkG),
  81 fSecVtxWithKF(source.fSecVtxWithKF),
  82 fRecoPrimVtxSkippingTrks(source.fRecoPrimVtxSkippingTrks),
  83 fRmTrksFromPrimVtx(source.fRmTrksFromPrimVtx),
  84 fV1(source.fV1),
  85 fD0toKpi(source.fD0toKpi),
  86 fJPSItoEle(source.fJPSItoEle),
  87 f3Prong(source.f3Prong),
  88 f4Prong(source.f4Prong),
  89 fITSrefit(source.fITSrefit),
  90 fBothSPD(source.fBothSPD),
  91 fMinITSCls(source.fMinITSCls),
  92 fMinPtCut(source.fMinPtCut),
  93 fMind0rphiCut(source.fMind0rphiCut)
  94 {
  95   //
  96   // Copy constructor
  97   //
  98   for(Int_t i=0; i<9; i++)  fD0toKpiCuts[i]=source.fD0toKpiCuts[i];
  99   for(Int_t i=0; i<9; i++)  fBtoJPSICuts[i]=source.fBtoJPSICuts[i];
 100   for(Int_t i=0; i<12; i++) fDplusCuts[i]=source.fDplusCuts[i];
 101   for(Int_t i=0; i<13; i++)  fDsCuts[i]=source.fDsCuts[i];
 102   for(Int_t i=0; i<12; i++)  fLcCuts[i]=source.fLcCuts[i];
 103 }
 104 //--------------------------------------------------------------------------
 105 AliAnalysisVertexingHF &AliAnalysisVertexingHF::operator=(const AliAnalysisVertexingHF &source)
 106 {
 107   //
 108   // assignment operator
 109   //
 110   if(&source == this) return *this;
 111   fInputAOD = source.fInputAOD;
 112   fBzkG = source.fBzkG;
 113   fSecVtxWithKF = source.fSecVtxWithKF;
 114   fRecoPrimVtxSkippingTrks = source.fRecoPrimVtxSkippingTrks;
 115   fRmTrksFromPrimVtx = source.fRmTrksFromPrimVtx;
 116   fV1 = source.fV1;
 117   fD0toKpi = source.fD0toKpi;
 118   fJPSItoEle = source.fJPSItoEle;
 119   f3Prong = source.f3Prong;
 120   f4Prong = source.f4Prong;
 121   fITSrefit = source.fITSrefit;
 122   fBothSPD = source.fBothSPD;
 123   fMinITSCls = source.fMinITSCls;
 124   fMinPtCut = source.fMinPtCut;
 125   fMind0rphiCut = source.fMind0rphiCut;
 126
 127   for(Int_t i=0; i<9; i++)  fD0toKpiCuts[i]=source.fD0toKpiCuts[i];
 128   for(Int_t i=0; i<9; i++)  fBtoJPSICuts[i]=source.fBtoJPSICuts[i];
 129   for(Int_t i=0; i<12; i++) fDplusCuts[i]=source.fDplusCuts[i];
 130   for(Int_t i=0; i<13; i++)  fDsCuts[i]=source.fDsCuts[i];
 131   for(Int_t i=0; i<12; i++)  fLcCuts[i]=source.fLcCuts[i];
 132
 133   return *this;
 134 }
 135 //----------------------------------------------------------------------------
 136 AliAnalysisVertexingHF::~AliAnalysisVertexingHF() {
 137   // Destructor
 138   if(fV1) { delete fV1; fV1=0; }
 139 }
 140 //----------------------------------------------------------------------------
 141 void AliAnalysisVertexingHF::FindCandidates(AliVEvent *event,
 142                                             TClonesArray *aodVerticesHFTClArr,
 143                                             TClonesArray *aodD0toKpiTClArr,
 144                                             TClonesArray *aodJPSItoEleTClArr,
 145                                             TClonesArray *aodCharm3ProngTClArr,
 146                                             TClonesArray *aodCharm4ProngTClArr)
 147 {
 148   // Find heavy-flavour vertex candidates
 149   // Input:  ESD or AOD
 150   // Output: AOD (additional branches added)
 151
 152
 153   TString evtype = event->IsA()->GetName();
 154   fInputAOD = ((evtype=="AliAODEvent") ? kTRUE : kFALSE);
 155
 156   if(!aodVerticesHFTClArr) {
 157     printf("ERROR: no aodVerticesHFTClArr");
 158     return;
 159   }
 160   if(fD0toKpi && !aodD0toKpiTClArr) {
 161     printf("ERROR: no aodD0toKpiTClArr");
 162     return;
 163   }
 164   if(fJPSItoEle && !aodJPSItoEleTClArr) {
 165     printf("ERROR: no aodJPSItoEleTClArr");
 166     return;
 167   }
 168   if(f3Prong && !aodCharm3ProngTClArr) {
 169     printf("ERROR: no aodCharm3ProngTClArr");
 170     return;
 171   }
 172   if(f4Prong && !aodCharm4ProngTClArr) {
 173     printf("ERROR: no aodCharm4ProngTClArr");
 174     return;
 175   }
 176
 177   // delete candidates from previous event and create references
 178   Int_t iVerticesHF=0,iD0toKpi=0,iJPSItoEle=0,i3Prong=0,i4Prong=0;
 179   aodVerticesHFTClArr->Delete();
 180   iVerticesHF = aodVerticesHFTClArr->GetEntriesFast();
 181   TClonesArray &verticesHFRef = *aodVerticesHFTClArr;
 182   if(fD0toKpi)   {
 183     aodD0toKpiTClArr->Delete();
 184     iD0toKpi = aodD0toKpiTClArr->GetEntriesFast();
 185   }
 186   if(fJPSItoEle) {
 187     aodJPSItoEleTClArr->Delete();
 188     iJPSItoEle = aodJPSItoEleTClArr->GetEntriesFast();
 189   }
 190   if(f3Prong) {
 191     aodCharm3ProngTClArr->Delete();
 192     i3Prong = aodCharm3ProngTClArr->GetEntriesFast();
 193   }
 194   if(f4Prong) {
 195     aodCharm4ProngTClArr->Delete();
 196     i4Prong = aodCharm4ProngTClArr->GetEntriesFast();
 197   }
 198   TClonesArray &aodD0toKpiRef     = *aodD0toKpiTClArr;
 199   TClonesArray &aodJPSItoEleRef   = *aodJPSItoEleTClArr;
 200   TClonesArray &aodCharm3ProngRef = *aodCharm3ProngTClArr;
 201   TClonesArray &aodCharm4ProngRef = *aodCharm4ProngTClArr;
 202
 203
 204   AliAODRecoDecayHF2Prong *io2Prong = 0;
 205   AliAODRecoDecayHF3Prong *io3Prong = 0;
 206   AliAODRecoDecayHF4Prong *io4Prong = 0;
 207
 208   Int_t    iTrkP1,iTrkP2,iTrkN1,iTrkN2,trkEntries;
 209   Int_t    nTrksP=0,nTrksN=0;
 210   Double_t xdummy,ydummy,dcap1n1,dcap1n2,dcap2n1,dcap1p2,dcan1n2;
 211   Bool_t   okD0=kFALSE,okJPSI=kFALSE,ok3Prong=kFALSE,ok4Prong=kFALSE;
 212   AliESDtrack *postrack1 = 0;
 213   AliESDtrack *postrack2 = 0;
 214   AliESDtrack *negtrack1 = 0;
 215   AliESDtrack *negtrack2 = 0;
 216   Double_t dcaMax = fD0toKpiCuts[1];
 217   if(dcaMax < fBtoJPSICuts[1]) dcaMax=fBtoJPSICuts[1];
 218   if(dcaMax < fDplusCuts[11])  dcaMax=fDplusCuts[11];
 219   AliDebug(2,Form(" dca cut set to %f cm",dcaMax));
 220
 221
 222   // get Bz
 223   fBzkG = (Double_t)event->GetMagneticField();
 224
 225   trkEntries = (Int_t)event->GetNumberOfTracks();
 226   AliDebug(1,Form(" Number of tracks: %d",trkEntries));
 227
 228   if(trkEntries<2) {
 229     AliDebug(1,Form(" Not enough tracks: %d",trkEntries));
 230     return;
 231   }
 232
 233   const AliVVertex *primary = event->GetPrimaryVertex();
 234   if(!primary) {
 235     AliDebug(1," No primary vertex from tracks");
 236     return;
 237   }
 238   TString primTitle = primary->GetTitle();
 239   if(!primTitle.Contains("VertexerTracks")) {
 240     AliDebug(1," No primary vertex from tracks");
 241     return;
 242   }
 243
 244   // call function that applies sigle-track selection,
 245   // separates positives and negatives,
 246   // and retrieves primary vertex
 247   TObjArray trksP(trkEntries/2);
 248   TObjArray trksN(trkEntries/2);
 249   SelectTracksAndCopyVertex(event,trksP,nTrksP,trksN,nTrksN);
 250
 251   AliDebug(1,Form(" Pos. tracks: %d    Neg. tracks: %d",nTrksP,nTrksN));
 252
 253   TObjArray *twoTrackArray1  = new TObjArray(2);
 254   TObjArray *twoTrackArray2  = new TObjArray(2);
 255   TObjArray *threeTrackArray = new TObjArray(3);
 256   TObjArray *fourTrackArray  = new TObjArray(4);
 257
 258   Double_t dispersion;
 259
 260   // LOOP ON  POSITIVE  TRACKS
 261   for(iTrkP1=0; iTrkP1<nTrksP; iTrkP1++) {
 262     if(iTrkP1%1==0) AliDebug(1,Form("  Processing positive track number %d of %d",iTrkP1,nTrksP));
 263     // get track from tracks array
 264     postrack1 = (AliESDtrack*)trksP.UncheckedAt(iTrkP1);
 265
 266     // LOOP ON  NEGATIVE  TRACKS
 267     for(iTrkN1=0; iTrkN1<nTrksN; iTrkN1++) {
 268       if(iTrkN1%1==0) AliDebug(1,Form("    Processing negative track number %d of %d",iTrkN1,nTrksN));
 269       // get track from tracks array
 270       negtrack1 = (AliESDtrack*)trksN.UncheckedAt(iTrkN1);
 271       // back to primary vertex
 272       postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 273       negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 274       // DCA between the two tracks
 275       dcap1n1 = postrack1->GetDCA(negtrack1,fBzkG,xdummy,ydummy);
 276       if(dcap1n1>dcaMax) { negtrack1=0; continue; }
 277       // Vertexing
 278       twoTrackArray1->AddAt(postrack1,0);
 279       twoTrackArray1->AddAt(negtrack1,1);
 280       AliAODVertex *vertexp1n1 = ReconstructSecondaryVertex(twoTrackArray1,dispersion);
 281       if(!vertexp1n1) {
 282         twoTrackArray1->Clear();
 283         negtrack1=0;
 284         continue;
 285       }
 286       if(fD0toKpi || fJPSItoEle) {
 287         io2Prong = Make2Prong(twoTrackArray1,event,vertexp1n1,dcap1n1,okD0,okJPSI);
 288         if(okD0 || okJPSI) {
 289           AliAODVertex *v = new(verticesHFRef[iVerticesHF++])AliAODVertex(*vertexp1n1);
 290           if(fInputAOD) AddDaughterRefs(v,event,twoTrackArray1);
 291           if(okD0) {
 292             AliAODRecoDecayHF2Prong *rd = new(aodD0toKpiRef[iD0toKpi++])AliAODRecoDecayHF2Prong(*io2Prong);
 293             rd->SetSecondaryVtx(v);
 294             v->SetParent(rd);
 295           }
 296           if(okJPSI) {
 297             AliAODRecoDecayHF2Prong *rd = new(aodJPSItoEleRef[iJPSItoEle++])AliAODRecoDecayHF2Prong(*io2Prong);
 298             rd->SetSecondaryVtx(v);
 299             if(!okD0) v->SetParent(rd); // do something better here...
 300           }
 301         }
 302         io2Prong=NULL;
 303       }
 304
 305       twoTrackArray1->Clear();
 306       if(!f3Prong && !f4Prong)  {
 307         negtrack1=0;
 308         delete vertexp1n1;
 309         continue;
 310       }
 311
 312
 313       // 2nd LOOP  ON  POSITIVE  TRACKS
 314       for(iTrkP2=iTrkP1+1; iTrkP2<nTrksP; iTrkP2++) {
 315         // get track from tracks array
 316         postrack2 = (AliESDtrack*)trksP.UncheckedAt(iTrkP2);
 317         // back to primary vertex
 318         postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 319         postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 320         negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 321         dcap2n1 = postrack2->GetDCA(negtrack1,fBzkG,xdummy,ydummy);
 322         if(dcap2n1>dcaMax) { postrack2=0; continue; }
 323         dcap1p2 = postrack2->GetDCA(postrack1,fBzkG,xdummy,ydummy);
 324         if(dcap1p2>dcaMax) { postrack2=0; continue; }
 325
 326         // Vertexing
 327         twoTrackArray2->AddAt(postrack2,0);
 328         twoTrackArray2->AddAt(negtrack1,1);
 329         AliAODVertex *vertexp2n1 = ReconstructSecondaryVertex(twoTrackArray2,dispersion);
 330         if(!vertexp2n1) {
 331           twoTrackArray2->Clear();
 332           postrack2=0;
 333           continue;
 334         }
 335         if(f3Prong) {
 336           threeTrackArray->AddAt(postrack1,0);
 337           threeTrackArray->AddAt(negtrack1,1);
 338           threeTrackArray->AddAt(postrack2,2);
 339           AliAODVertex* secVert3PrAOD = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 340           io3Prong = Make3Prong(threeTrackArray,event,secVert3PrAOD,dispersion,vertexp1n1,vertexp2n1,dcap1n1,dcap2n1,dcap1p2,ok3Prong);
 341           if(ok3Prong) {
 342             AliAODVertex *v = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert3PrAOD);
 343             if(fInputAOD) AddDaughterRefs(v,event,threeTrackArray);
 344             AliAODRecoDecayHF3Prong *rd = new(aodCharm3ProngRef[i3Prong++])AliAODRecoDecayHF3Prong(*io3Prong);
 345             rd->SetSecondaryVtx(v);
 346             v->SetParent(rd);
 347           }
 348           if(io3Prong) io3Prong=NULL;
 349         }
 350         if(f4Prong) {
 351           // 3rd LOOP  ON  NEGATIVE  TRACKS (for 4 prong)
 352           for(iTrkN2=iTrkN1+1; iTrkN2<nTrksN; iTrkN2++) {
 353             // get track from tracks array
 354             negtrack2 = (AliESDtrack*)trksN.UncheckedAt(iTrkN2);
 355             // back to primary vertex
 356             postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 357             postrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 358             negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 359             negtrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 360             dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 361             if(dcap1n2>dcaMax) { negtrack2=0; continue; }
 362             // Vertexing
 363             fourTrackArray->AddAt(postrack1,0);
 364             fourTrackArray->AddAt(negtrack1,1);
 365             fourTrackArray->AddAt(postrack2,2);
 366             fourTrackArray->AddAt(negtrack2,3);
 367             AliAODVertex* secVert4PrAOD = ReconstructSecondaryVertex(fourTrackArray,dispersion);
 368             io4Prong = Make4Prong(fourTrackArray,event,secVert4PrAOD,vertexp1n1,vertexp2n1,dcap1n1,dcap1n2,dcap2n1,ok4Prong);
 369             if(ok4Prong) {
 370               AliAODVertex *v = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert4PrAOD);
 371               if(fInputAOD) AddDaughterRefs(v,event,fourTrackArray);
 372               AliAODRecoDecayHF4Prong *rd = new(aodCharm4ProngRef[i4Prong++])AliAODRecoDecayHF4Prong(*io4Prong);
 373               rd->SetSecondaryVtx(v);
 374               v->SetParent(rd);
 375             }
 376             if(io4Prong) io4Prong=NULL;
 377             fourTrackArray->Clear();
 378             negtrack2 = 0;
 379           } // end loop on negative tracks
 380         }
 381         postrack2 = 0;
 382         delete vertexp2n1;
 383       } // end 2nd loop on positive tracks
 384       twoTrackArray2->Clear();
 385
 386       // 2nd LOOP  ON  NEGATIVE  TRACKS
 387       for(iTrkN2=iTrkN1+1; iTrkN2<nTrksN; iTrkN2++) {
 388         // get track from tracks array
 389         negtrack2 = (AliESDtrack*)trksN.UncheckedAt(iTrkN2);
 390         // back to primary vertex
 391         postrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 392         negtrack1->PropagateToDCA(fV1,fBzkG,kVeryBig);
 393         negtrack2->PropagateToDCA(fV1,fBzkG,kVeryBig);
 394         dcap1n2 = postrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 395         if(dcap1n2>dcaMax) { negtrack2=0; continue; }
 396         dcan1n2 = negtrack1->GetDCA(negtrack2,fBzkG,xdummy,ydummy);
 397         if(dcan1n2>dcaMax) { negtrack2=0; continue; }
 398
 399         // Vertexing
 400         twoTrackArray2->AddAt(postrack1,0);
 401         twoTrackArray2->AddAt(negtrack2,1);
 402
 403         AliAODVertex *vertexp1n2 = ReconstructSecondaryVertex(twoTrackArray2,dispersion);
 404         if(!vertexp1n2) {
 405           twoTrackArray2->Clear();
 406           negtrack2=0;
 407           continue;
 408         }
 409         if(f3Prong) {
 410           threeTrackArray->AddAt(negtrack1,0);
 411           threeTrackArray->AddAt(postrack1,1);
 412           threeTrackArray->AddAt(negtrack2,2);
 413           AliAODVertex* secVert3PrAOD = ReconstructSecondaryVertex(threeTrackArray,dispersion);
 414           io3Prong = Make3Prong(threeTrackArray,event,secVert3PrAOD,dispersion,vertexp1n1,vertexp1n2,dcap1n1,dcap1n2,dcan1n2,ok3Prong);
 415           if(ok3Prong) {
 416             AliAODVertex *v = new(verticesHFRef[iVerticesHF++])AliAODVertex(*secVert3PrAOD);
 417             if(fInputAOD) AddDaughterRefs(v,event,threeTrackArray);
 418             AliAODRecoDecayHF3Prong *rd = new(aodCharm3ProngRef[i3Prong++])AliAODRecoDecayHF3Prong(*io3Prong);
 419             rd->SetSecondaryVtx(v);
 420             v->SetParent(rd);
 421           }
 422           if(io3Prong) io3Prong=NULL;
 423         }
 424         negtrack2 = 0;
 425         delete vertexp1n2;
 426       } // end 2nd loop on negative tracks
 427       twoTrackArray2->Clear();
 428
 429       negtrack1 = 0;
 430       delete vertexp1n1;
 431     } // end 1st loop on negative tracks
 432
 433     postrack1 = 0;
 434   }  // end 1st loop on positive tracks
 435
 436
 437   if(fD0toKpi) {
 438     AliDebug(1,Form(" D0->Kpi in event = %d;",
 439                     (Int_t)aodD0toKpiTClArr->GetEntriesFast()));
 440   }
 441   if(fJPSItoEle) {
 442     AliDebug(1,Form(" JPSI->ee in event = %d;",
 443                     (Int_t)aodJPSItoEleTClArr->GetEntriesFast()));
 444   }
 445   if(f3Prong) {
 446     AliDebug(1,Form(" Charm->3Prong in event = %d;",
 447                     (Int_t)aodCharm3ProngTClArr->GetEntriesFast()));
 448   }
 449   if(f4Prong) {
 450     AliDebug(1,Form(" Charm->4Prong in event = %d;\n",
 451                     (Int_t)aodCharm4ProngTClArr->GetEntriesFast()));
 452   }
 453
 454
 455   twoTrackArray1->Delete();  delete twoTrackArray1;
 456   twoTrackArray2->Delete();  delete twoTrackArray2;
 457   threeTrackArray->Clear();
 458   threeTrackArray->Delete(); delete threeTrackArray;
 459   fourTrackArray->Delete();  delete fourTrackArray;
 460
 461   if(fInputAOD) {
 462     trksP.Delete();
 463     trksN.Delete();
 464   }
 465
 466   return;
 467 }
 468 //----------------------------------------------------------------------------
 469 void AliAnalysisVertexingHF::AddDaughterRefs(AliAODVertex *v,AliVEvent *event,
 470                                              TObjArray *trkArray) const
 471 {
 472   // Add the AOD tracks as daughters of the vertex (TRef)
 473
 474   Int_t nTrks = trkArray->GetEntriesFast();
 475
 476   AliESDtrack *esdTrack = 0;
 477   AliAODTrack *aodTrack = 0;
 478   Int_t id;
 479
 480   for(Int_t i=0; i<nTrks; i++) {
 481     esdTrack = (AliESDtrack*)trkArray->UncheckedAt(i);
 482     id = (Int_t)esdTrack->GetID();
 483     aodTrack = (AliAODTrack*)event->GetTrack(fAODMap[id]);
 484     v->AddDaughter(aodTrack);
 485   }
 486
 487   return;
 488 }
 489 //----------------------------------------------------------------------------
 490 AliAODRecoDecayHF2Prong *AliAnalysisVertexingHF::Make2Prong(
 491                                    TObjArray *twoTrackArray1,AliVEvent *event,
 492                                    AliAODVertex *secVert,Double_t dca,
 493                                    Bool_t &okD0,Bool_t &okJPSI) const
 494 {
 495   // Make 2Prong candidates and check if they pass D0toKpi or BtoJPSI
 496   // reconstruction cuts
 497   // G.E.Bruno (J/psi), A.Dainese (D0->Kpi)
 498
 499   okD0=kFALSE; okJPSI=kFALSE;
 500
 501   Double_t px[2],py[2],pz[2],d0[2],d0err[2];
 502
 503   AliESDtrack *postrack = (AliESDtrack*)twoTrackArray1->UncheckedAt(0);
 504   AliESDtrack *negtrack = (AliESDtrack*)twoTrackArray1->UncheckedAt(1);
 505
 506   // propagate tracks to secondary vertex, to compute inv. mass
 507   postrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 508   negtrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 509
 510   Double_t momentum[3];
 511   postrack->GetPxPyPz(momentum);
 512   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
 513   negtrack->GetPxPyPz(momentum);
 514   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
 515
 516
 517   // invariant mass cut (try to improve coding here..)
 518   Bool_t okMassCut=kFALSE;
 519   if(!okMassCut && fD0toKpi)   if(SelectInvMass(0,2,px,py,pz)) okMassCut=kTRUE;
 520   if(!okMassCut && fJPSItoEle) if(SelectInvMass(1,2,px,py,pz)) okMassCut=kTRUE;
 521   if(!okMassCut) {
 522     AliDebug(2," candidate didn't pass mass cut");
 523     return 0x0;
 524   }
 525
 526   // primary vertex to be used by this candidate
 527   AliAODVertex *primVertexAOD  = OwnPrimaryVertex(twoTrackArray1,event);
 528   if(!primVertexAOD) return 0x0;
 529
 530   Double_t d0z0[2],covd0z0[3];
 531   postrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 532   d0[0] = d0z0[0];
 533   d0err[0] = TMath::Sqrt(covd0z0[0]);
 534   negtrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 535   d0[1] = d0z0[0];
 536   d0err[1] = TMath::Sqrt(covd0z0[0]);
 537
 538   // create the object AliAODRecoDecayHF2Prong
 539   AliAODRecoDecayHF2Prong *the2Prong = new AliAODRecoDecayHF2Prong(secVert,px,py,pz,d0,d0err,dca);
 540   the2Prong->SetOwnPrimaryVtx(primVertexAOD);
 541   UShort_t id[2]={(UShort_t)postrack->GetID(),(UShort_t)negtrack->GetID()};
 542   the2Prong->SetProngIDs(2,id);
 543
 544
 545   // select D0->Kpi
 546   Int_t checkD0,checkD0bar;
 547   if(fD0toKpi) okD0 = the2Prong->SelectD0(fD0toKpiCuts,checkD0,checkD0bar);
 548   //if(fDebug && fD0toKpi) printf("   %d\n",(Int_t)okD0);
 549   // select J/psi from B
 550   Int_t checkJPSI;
 551   if(fJPSItoEle) okJPSI = the2Prong->SelectBtoJPSI(fBtoJPSICuts,checkJPSI);
 552   //if(fDebug && fJPSItoEle) printf("   %d\n",(Int_t)okJPSI);
 553
 554   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) the2Prong->UnsetOwnPrimaryVtx();
 555
 556   if(okD0 || okJPSI) {
 557     // get PID info from ESD
 558     Double_t esdpid0[5];
 559     postrack->GetESDpid(esdpid0);
 560     Double_t esdpid1[5];
 561     negtrack->GetESDpid(esdpid1);
 562     Double_t esdpid[10];
 563     for(Int_t i=0;i<5;i++) {
 564       esdpid[i]   = esdpid0[i];
 565       esdpid[5+i] = esdpid1[i];
 566     }
 567     the2Prong->SetPID(2,esdpid);
 568   }
 569
 570   return the2Prong;
 571 }
 572 //----------------------------------------------------------------------------
 573 AliAODRecoDecayHF3Prong* AliAnalysisVertexingHF::Make3Prong(
 574                              TObjArray *threeTrackArray,AliVEvent *event,
 575                              AliAODVertex *secVert,Double_t dispersion,
 576                              AliAODVertex *vertexp1n1,AliAODVertex *vertexp2n1,
 577                              Double_t dcap1n1,Double_t dcap2n1,Double_t dcap1p2,
 578                              Bool_t &ok3Prong) const
 579 {
 580   // Make 3Prong candidates and check if they pass Dplus or Ds or Lambdac
 581   // reconstruction cuts
 582   // E.Bruna, F.Prino
 583
 584
 585   ok3Prong=kFALSE;
 586   if(!secVert) return 0x0;
 587
 588   Double_t px[3],py[3],pz[3],d0[3],d0err[3];
 589   Double_t momentum[3];
 590
 591
 592   AliESDtrack *postrack1 = (AliESDtrack*)threeTrackArray->UncheckedAt(0);
 593   AliESDtrack *negtrack  = (AliESDtrack*)threeTrackArray->UncheckedAt(1);
 594   AliESDtrack *postrack2 = (AliESDtrack*)threeTrackArray->UncheckedAt(2);
 595
 596   postrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
 597   negtrack->PropagateToDCA(secVert,fBzkG,kVeryBig);
 598   postrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
 599   postrack1->GetPxPyPz(momentum);
 600   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
 601   negtrack->GetPxPyPz(momentum);
 602   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
 603   postrack2->GetPxPyPz(momentum);
 604   px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
 605
 606   // invariant mass cut for D+, Ds, Lc
 607   Bool_t okMassCut=kFALSE;
 608   if(!okMassCut && f3Prong) if(SelectInvMass(2,3,px,py,pz)) okMassCut=kTRUE;
 609   if(!okMassCut) {
 610     AliDebug(2," candidate didn't pass mass cut");
 611     return 0x0;
 612   }
 613
 614   // primary vertex to be used by this candidate
 615   AliAODVertex *primVertexAOD  = OwnPrimaryVertex(threeTrackArray,event);
 616   if(!primVertexAOD) return 0x0;
 617
 618   Double_t d0z0[2],covd0z0[3];
 619   postrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 620   d0[0]=d0z0[0];
 621   d0err[0] = TMath::Sqrt(covd0z0[0]);
 622   negtrack->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 623   d0[1]=d0z0[0];
 624   d0err[1] = TMath::Sqrt(covd0z0[0]);
 625   postrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 626   d0[2]=d0z0[0];
 627   d0err[2] = TMath::Sqrt(covd0z0[0]);
 628
 629
 630   // create the object AliAODRecoDecayHF3Prong
 631   Double_t pos[3]; primVertexAOD->GetXYZ(pos);
 632   Double_t dca[3]={dcap1n1,dcap2n1,dcap1p2};
 633   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]));
 634   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]));
 635   Short_t charge=(Short_t)(postrack1->Charge()*postrack2->Charge()*negtrack->Charge());
 636   AliAODRecoDecayHF3Prong *the3Prong = new AliAODRecoDecayHF3Prong(secVert,px,py,pz,d0,d0err,dca,dispersion,dist12,dist23,charge);
 637   the3Prong->SetOwnPrimaryVtx(primVertexAOD);
 638   UShort_t id[3]={(UShort_t)postrack1->GetID(),(UShort_t)negtrack->GetID(),(UShort_t)postrack2->GetID()};
 639   the3Prong->SetProngIDs(3,id);
 640
 641
 642   // select D+->Kpipi, Ds->KKpi, Lc->pKpi
 643   if(f3Prong) {
 644     ok3Prong = kFALSE;
 645     Int_t ok1,ok2;
 646     if(the3Prong->SelectDplus(fDplusCuts))   ok3Prong = kTRUE;
 647     if(the3Prong->SelectDs(fDsCuts,ok1,ok2)) ok3Prong = kTRUE;
 648     if(the3Prong->SelectLc(fLcCuts,ok1,ok2)) ok3Prong = kTRUE;
 649   }
 650   //if(fDebug) printf("ok3Prong: %d\n",(Int_t)ok3Prong);
 651
 652   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) the3Prong->UnsetOwnPrimaryVtx();
 653
 654   if(ok3Prong) {
 655     // get PID info from ESD
 656     Double_t esdpid0[5];
 657     postrack1->GetESDpid(esdpid0);
 658     Double_t esdpid1[5];
 659     negtrack->GetESDpid(esdpid1);
 660     Double_t esdpid2[5];
 661     postrack2->GetESDpid(esdpid2);
 662
 663     Double_t esdpid[15];
 664     for(Int_t i=0;i<5;i++) {
 665       esdpid[i]   = esdpid0[i];
 666       esdpid[5+i] = esdpid1[i];
 667       esdpid[10+i] = esdpid2[i];
 668     }
 669     the3Prong->SetPID(3,esdpid);
 670   }
 671
 672   return the3Prong;
 673 }
 674 //----------------------------------------------------------------------------
 675 AliAODRecoDecayHF4Prong* AliAnalysisVertexingHF::Make4Prong(
 676                              TObjArray *fourTrackArray,AliVEvent *event,
 677                              AliAODVertex *secVert,
 678                              AliAODVertex *vertexp1n1,AliAODVertex *vertexp2n1,
 679                              Double_t dcap1n1,Double_t dcap1n2,Double_t dcap2n1,
 680                              Bool_t &ok4Prong) const
 681 {
 682   // Make 4Prong candidates and check if they pass D0toKpipipi
 683   // reconstruction cuts
 684   // G.E.Bruno, R.Romita
 685
 686   ok4Prong=kFALSE;
 687   if(!secVert) return 0x0;
 688
 689   Double_t px[4],py[4],pz[4],d0[4],d0err[4];//d0z[3];
 690
 691   px[0]=dcap1n1*dcap1n2*dcap2n1; // TO BE CHANGED (done just to removed compilation warning about dca... not used)
 692
 693   AliESDtrack *postrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(0);
 694   AliESDtrack *negtrack1 = (AliESDtrack*)fourTrackArray->UncheckedAt(1);
 695   AliESDtrack *postrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(2);
 696   AliESDtrack *negtrack2 = (AliESDtrack*)fourTrackArray->UncheckedAt(3);
 697
 698   postrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
 699   negtrack1->PropagateToDCA(secVert,fBzkG,kVeryBig);
 700   postrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
 701   negtrack2->PropagateToDCA(secVert,fBzkG,kVeryBig);
 702
 703   Double_t momentum[3];
 704   postrack1->GetPxPyPz(momentum);
 705   px[0] = momentum[0]; py[0] = momentum[1]; pz[0] = momentum[2];
 706   negtrack1->GetPxPyPz(momentum);
 707   px[1] = momentum[0]; py[1] = momentum[1]; pz[1] = momentum[2];
 708   postrack2->GetPxPyPz(momentum);
 709   px[2] = momentum[0]; py[2] = momentum[1]; pz[2] = momentum[2];
 710   negtrack2->GetPxPyPz(momentum);
 711   px[3] = momentum[0]; py[3] = momentum[1]; pz[3] = momentum[2];
 712
 713   // invariant mass cut for rho or D0 (try to improve coding here..)
 714   //Bool_t okMassCut=kFALSE;
 715   //if(!okMassCut) if(SelectInvMass(2,3,px,py,pz)) okMassCut=kTRUE;
 716   //if(!okMassCut) {
 717   //  if(fDebug) printf(" candidate didn't pass mass cut\n");
 718   //  return 0x0;
 719   //}
 720
 721   // primary vertex to be used by this candidate
 722   AliAODVertex *primVertexAOD  = OwnPrimaryVertex(fourTrackArray,event);
 723   if(!primVertexAOD) return 0x0;
 724
 725   /*
 726     Double_t d0z0[2],covd0z0[3];
 727     postrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 728     negtrack1->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 729     postrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 730     negtrack2->PropagateToDCA(primVertexAOD,fBzkG,kVeryBig,d0z0,covd0z0);
 731   */
 732
 733   // create the object AliAODRecoDecayHF4Prong
 734   Double_t pos[3]; primVertexAOD->GetXYZ(pos);
 735   Double_t dca[6]={0.,0.,0.,0.,0.,0.}; //  modify it
 736   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]));
 737   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]));
 738   Double_t dist14=0.; // to be implemented
 739   Double_t dist34=0.; // to be implemented
 740   Short_t charge=0;
 741   AliAODRecoDecayHF4Prong *the4Prong = new AliAODRecoDecayHF4Prong(secVert,px,py,pz,d0,d0err,dca,dist12,dist23,dist14,dist34,charge);
 742   the4Prong->SetOwnPrimaryVtx(primVertexAOD);
 743   UShort_t id[4]={(UShort_t)postrack1->GetID(),(UShort_t)negtrack1->GetID(),(UShort_t)postrack2->GetID(),(UShort_t)negtrack2->GetID()};
 744   the4Prong->SetProngIDs(4,id);
 745
 746
 747   // use the following two lines once AliAODRecoDecayHF4Prong::SelectD0 is available
 748   // select D0->Kpipipi
 749   //Int_t checkD0,checkD0bar;
 750   // ok4Prong=the4Prong->SelectD0(fD04pCuts,checkD0,checkD0bar);
 751   ok4Prong=kFALSE;  //for the time being ...
 752
 753   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) the4Prong->UnsetOwnPrimaryVtx();
 754
 755   // get PID info from ESD
 756   Double_t esdpid0[5];
 757   postrack1->GetESDpid(esdpid0);
 758   Double_t esdpid1[5];
 759   negtrack1->GetESDpid(esdpid1);
 760   Double_t esdpid2[5];
 761   postrack2->GetESDpid(esdpid2);
 762   Double_t esdpid3[5];
 763   negtrack2->GetESDpid(esdpid3);
 764
 765   Double_t esdpid[20];
 766   for(Int_t i=0;i<5;i++) {
 767     esdpid[i]   = esdpid0[i];
 768     esdpid[5+i] = esdpid1[i];
 769     esdpid[10+i] = esdpid2[i];
 770     esdpid[15+i] = esdpid3[i];
 771   }
 772   the4Prong->SetPID(4,esdpid);
 773
 774   return the4Prong;
 775 }
 776 //-----------------------------------------------------------------------------
 777 AliAODVertex* AliAnalysisVertexingHF::OwnPrimaryVertex(TObjArray *trkArray,
 778                                                        AliVEvent *event) const
 779 {
 780   // Returns primary vertex specific to this candidate
 781
 782   AliESDVertex *vertexESD = 0;
 783   AliAODVertex *vertexAOD = 0;
 784
 785   Int_t nTrks = trkArray->GetEntriesFast();
 786
 787   if(!fRecoPrimVtxSkippingTrks && !fRmTrksFromPrimVtx) {
 788     // primary vertex from the input event
 789
 790     vertexESD = new AliESDVertex(*fV1);
 791
 792   } else {
 793     // primary vertex specific to this candidate
 794
 795     AliVertexerTracks *vertexer = new AliVertexerTracks(event->GetMagneticField());
 796
 797     if(fRecoPrimVtxSkippingTrks) {
 798       // recalculating the vertex
 799
 800       if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraint")) {
 801         Float_t diamondcovxy[3];
 802         event->GetDiamondCovXY(diamondcovxy);
 803         Double_t pos[3]={event->GetDiamondX(),event->GetDiamondY(),0.};
 804         Double_t cov[6]={diamondcovxy[0],diamondcovxy[1],diamondcovxy[2],0.,0.,10.};
 805         AliESDVertex *diamond = new AliESDVertex(pos,cov,1.,1);
 806         vertexer->SetVtxStart(diamond);
 807         delete diamond; diamond=NULL;
 808         if(strstr(fV1->GetTitle(),"VertexerTracksWithConstraintOnlyFitter"))
 809           vertexer->SetOnlyFitter();
 810       }
 811       Int_t skipped[10];
 812       AliESDtrack *t = 0;
 813       for(Int_t i=0; i<nTrks; i++) {
 814         t = (AliESDtrack*)trkArray->UncheckedAt(i);
 815         skipped[i] = (Int_t)t->GetID();
 816       }
 817       vertexer->SetSkipTracks(nTrks,skipped);
 818       vertexESD = (AliESDVertex*)vertexer->FindPrimaryVertex(event);
 819
 820     } else if(fRmTrksFromPrimVtx) {
 821       // removing the prongs tracks
 822
 823       TObjArray rmArray(nTrks);
 824       UShort_t *rmId = new UShort_t[nTrks];
 825       AliESDtrack *esdTrack = 0;
 826       AliESDtrack *t = 0;
 827       for(Int_t i=0; i<nTrks; i++) {
 828         t = (AliESDtrack*)trkArray->UncheckedAt(i);
 829         esdTrack = new AliESDtrack(*t);
 830         rmArray.AddLast(esdTrack);
 831         rmId[i]=(UShort_t)esdTrack->GetID();
 832       }
 833       Float_t diamondxy[2]={event->GetDiamondX(),event->GetDiamondY()};
 834       vertexESD = vertexer->RemoveTracksFromVertex(fV1,&rmArray,rmId,diamondxy);
 835       delete [] rmId; rmId=NULL;
 836       rmArray.Delete();
 837
 838     }
 839
 840     if(!vertexESD) return vertexAOD;
 841     if(vertexESD->GetNContributors()<=0) {
 842       AliDebug(2,"vertexing failed");
 843       delete vertexESD; vertexESD=NULL;
 844       return vertexAOD;
 845     }
 846
 847     delete vertexer; vertexer=NULL;
 848
 849   }
 850
 851   // convert to AliAODVertex
 852   Double_t pos[3],cov[6],chi2perNDF;
 853   vertexESD->GetXYZ(pos); // position
 854   vertexESD->GetCovMatrix(cov); //covariance matrix
 855   chi2perNDF = vertexESD->GetChi2toNDF();
 856   delete vertexESD; vertexESD=NULL;
 857
 858   vertexAOD = new AliAODVertex(pos,cov,chi2perNDF);
 859
 860   return vertexAOD;
 861 }
 862 //-----------------------------------------------------------------------------
 863 void AliAnalysisVertexingHF::PrintStatus() const {
 864   // Print parameters being used
 865
 866   printf("Preselections:\n");
 867   printf("    fITSrefit   = %d\n",(Int_t)fITSrefit);
 868   printf("    fBothSPD   = %d\n",(Int_t)fBothSPD);
 869   printf("    fMinITSCls   = %d\n",fMinITSCls);
 870   printf("    fMinPtCut   = %f GeV/c\n",fMinPtCut);
 871   printf("    fMind0rphiCut   = %f cm\n",fMind0rphiCut);
 872   if(fSecVtxWithKF) {
 873     printf("Secondary vertex with Kalman filter package (AliKFParticle)\n");
 874   } else {
 875     printf("Secondary vertex with AliVertexerTracks\n");
 876   }
 877   if(fRecoPrimVtxSkippingTrks) printf("RecoPrimVtxSkippingTrks\n");
 878   if(fRmTrksFromPrimVtx) printf("RmTrksFromPrimVtx\n");
 879   if(fD0toKpi) {
 880     printf("Reconstruct D0->Kpi candidates with cuts:\n");
 881     printf("    |M-MD0| [GeV]    < %f\n",fD0toKpiCuts[0]);
 882     printf("    dca    [cm]  < %f\n",fD0toKpiCuts[1]);
 883     printf("    cosThetaStar     < %f\n",fD0toKpiCuts[2]);
 884     printf("    pTK     [GeV/c]    > %f\n",fD0toKpiCuts[3]);
 885     printf("    pTpi    [GeV/c]    > %f\n",fD0toKpiCuts[4]);
 886     printf("    |d0K|  [cm]  < %f\n",fD0toKpiCuts[5]);
 887     printf("    |d0pi| [cm]  < %f\n",fD0toKpiCuts[6]);
 888     printf("    d0d0  [cm^2] < %f\n",fD0toKpiCuts[7]);
 889     printf("    cosThetaPoint    > %f\n",fD0toKpiCuts[8]);
 890   }
 891   if(fJPSItoEle) {
 892     printf("Reconstruct J/psi from B candidates with cuts:\n");
 893     printf("    |M-MJPSI| [GeV]    < %f\n",fBtoJPSICuts[0]);
 894     printf("    dca    [cm]  < %f\n",fBtoJPSICuts[1]);
 895     printf("    cosThetaStar     < %f\n",fBtoJPSICuts[2]);
 896     printf("    pTP     [GeV/c]    > %f\n",fBtoJPSICuts[3]);
 897     printf("    pTN    [GeV/c]    > %f\n",fBtoJPSICuts[4]);
 898     printf("    |d0P|  [cm]  < %f\n",fBtoJPSICuts[5]);
 899     printf("    |d0N| [cm]  < %f\n",fBtoJPSICuts[6]);
 900     printf("    d0d0  [cm^2] < %f\n",fBtoJPSICuts[7]);
 901     printf("    cosThetaPoint    > %f\n",fBtoJPSICuts[8]);
 902   }
 903   if(f3Prong) {
 904     printf("Reconstruct 3 prong candidates.\n");
 905     printf("  D+->Kpipi cuts:\n");
 906     printf("    |M-MD+| [GeV]    < %f\n",fDplusCuts[0]);
 907     printf("    pTK     [GeV/c]    > %f\n",fDplusCuts[1]);
 908     printf("    pTPi    [GeV/c]    > %f\n",fDplusCuts[2]);
 909     printf("    |d0K|  [cm]  > %f\n",fDplusCuts[3]);
 910     printf("    |d0Pi| [cm]  > %f\n",fDplusCuts[4]);
 911     printf("    dist12    [cm]  < %f\n",fDplusCuts[5]);
 912     printf("    sigmavert [cm]   < %f\n",fDplusCuts[6]);
 913     printf("    dist prim-sec [cm] > %f\n",fDplusCuts[7]);
 914     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fDplusCuts[8]);
 915     printf("    cosThetaPoint    > %f\n",fDplusCuts[9]);
 916     printf("    Sum d0^2 [cm^2]  > %f\n",fDplusCuts[10]);
 917     printf("    dca cut [cm]  < %f\n",fDplusCuts[11]);
 918     printf("  Ds->KKpi cuts:\n");
 919     printf("    |M-MDs| [GeV]    < %f\n",fDsCuts[0]);
 920     printf("    pTK     [GeV/c]    > %f\n",fDsCuts[1]);
 921     printf("    pTPi    [GeV/c]    > %f\n",fDsCuts[2]);
 922     printf("    |d0K|  [cm]  > %f\n",fDsCuts[3]);
 923     printf("    |d0Pi| [cm]  > %f\n",fDsCuts[4]);
 924     printf("    dist12    [cm]  < %f\n",fDsCuts[5]);
 925     printf("    sigmavert [cm]   < %f\n",fDsCuts[6]);
 926     printf("    dist prim-sec [cm] > %f\n",fDsCuts[7]);
 927     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fDsCuts[8]);
 928     printf("    cosThetaPoint    > %f\n",fDsCuts[9]);
 929     printf("    Sum d0^2 [cm^2]  > %f\n",fDsCuts[10]);
 930     printf("    dca cut [cm]  < %f\n",fDsCuts[11]);
 931     printf("    Inv. Mass  phi/K0* [GeV]  < %f\n",fDsCuts[12]);
 932     printf("  Lc->pKpi cuts:\n");
 933     printf("    |M-MLc| [GeV]    < %f\n",fLcCuts[0]);
 934     printf("    pTP     [GeV/c]    > %f\n",fLcCuts[1]);
 935     printf("    pTPi and pTK [GeV/c]    > %f\n",fLcCuts[2]);
 936     printf("    |d0P|  [cm]  > %f\n",fLcCuts[3]);
 937     printf("    |d0Pi| and |d0K| [cm]  > %f\n",fLcCuts[4]);
 938     printf("    dist12    [cm]  < %f\n",fLcCuts[5]);
 939     printf("    sigmavert [cm]   < %f\n",fLcCuts[6]);
 940     printf("    dist prim-sec [cm] > %f\n",fLcCuts[7]);
 941     printf("    pM=Max{pT1,pT2,pT3} [GeV/c] > %f\n",fLcCuts[8]);
 942     printf("    cosThetaPoint    > %f\n",fLcCuts[9]);
 943     printf("    Sum d0^2 [cm^2]  > %f\n",fLcCuts[10]);
 944     printf("    dca cut [cm]  < %f\n",fLcCuts[11]);
 945     printf("  Ds->KKpi cuts:\n");
 946   }
 947
 948   return;
 949 }
 950 //-----------------------------------------------------------------------------
 951 AliAODVertex* AliAnalysisVertexingHF::ReconstructSecondaryVertex(TObjArray *trkArray,
 952                                                                  Double_t &dispersion) const
 953 {
 954   // Secondary vertex reconstruction with AliVertexerTracks or AliKFParticle
 955
 956   AliESDVertex *vertexESD = 0;
 957   AliAODVertex *vertexAOD = 0;
 958
 959   if(!fSecVtxWithKF) { // AliVertexerTracks
 960
 961     AliVertexerTracks *vertexer = new AliVertexerTracks(fBzkG);
 962     vertexer->SetVtxStart(fV1);
 963     vertexESD = (AliESDVertex*)vertexer->VertexForSelectedESDTracks(trkArray);
 964     delete vertexer; vertexer=NULL;
 965
 966     if(!vertexESD) return vertexAOD;
 967
 968     if(vertexESD->GetNContributors()!=trkArray->GetEntriesFast()) {
 969       AliDebug(2,"vertexing failed");
 970       delete vertexESD; vertexESD=NULL;
 971       return vertexAOD;
 972     }
 973
 974   } else { // Kalman Filter vertexer (AliKFParticle)
 975
 976     AliKFParticle::SetField(fBzkG);
 977
 978     AliKFParticle vertexKF;
 979
 980     Int_t nTrks = trkArray->GetEntriesFast();
 981     for(Int_t i=0; i<nTrks; i++) {
 982       AliESDtrack *esdTrack = (AliESDtrack*)trkArray->At(i);
 983       AliKFParticle daughterKF(*esdTrack,211);
 984       vertexKF.AddDaughter(daughterKF);
 985     }
 986     vertexESD = new AliESDVertex();
 987     vertexKF.CopyToESDVertex(*vertexESD);
 988
 989   }
 990
 991   // convert to AliAODVertex
 992   Double_t pos[3],cov[6],chi2perNDF;
 993   vertexESD->GetXYZ(pos); // position
 994   vertexESD->GetCovMatrix(cov); //covariance matrix
 995   chi2perNDF = vertexESD->GetChi2toNDF();
 996   dispersion = vertexESD->GetDispersion();
 997   delete vertexESD; vertexESD=NULL;
 998
 999   vertexAOD = new AliAODVertex(pos,cov,chi2perNDF);
1000   vertexAOD->SetType(AliAODVertex::kUndef); // to be changed
1001
1002   return vertexAOD;
1003 }
1004 //-----------------------------------------------------------------------------
1005 Bool_t AliAnalysisVertexingHF::SelectInvMass(Int_t decay,
1006                                              Int_t nprongs,
1007                                              Double_t *px,
1008                                              Double_t *py,
1009                                              Double_t *pz) const {
1010   // Check invariant mass cut
1011
1012   Short_t dummycharge=0;
1013   Double_t *dummyd0 = new Double_t[nprongs];
1014   for(Int_t ip=0;ip<nprongs;ip++) dummyd0[ip]=0.;
1015   AliAODRecoDecay *rd = new AliAODRecoDecay(0x0,nprongs,dummycharge,px,py,pz,dummyd0);
1016   delete [] dummyd0;
1017
1018   UInt_t pdg2[2],pdg3[3];
1019   Double_t mPDG,minv;
1020
1021   Bool_t retval=kFALSE;
1022   switch (decay)
1023     {
1024     case 0:                  // D0->Kpi
1025       pdg2[0]=211; pdg2[1]=321;
1026       mPDG=TDatabasePDG::Instance()->GetParticle(421)->Mass();
1027       minv = rd->InvMass(nprongs,pdg2);
1028       if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
1029       pdg2[0]=321; pdg2[1]=211;
1030       minv = rd->InvMass(nprongs,pdg2);
1031       if(TMath::Abs(minv-mPDG)<fD0toKpiCuts[0]) retval=kTRUE;
1032       break;
1033     case 1:                  // JPSI->ee
1034       pdg2[0]=11; pdg2[1]=11;
1035       mPDG=TDatabasePDG::Instance()->GetParticle(443)->Mass();
1036       minv = rd->InvMass(nprongs,pdg2);
1037       if(TMath::Abs(minv-mPDG)<fBtoJPSICuts[0]) retval=kTRUE;
1038       break;
1039     case 2:                  // D+->Kpipi
1040       pdg3[0]=211; pdg3[1]=321; pdg3[2]=211;
1041       mPDG=TDatabasePDG::Instance()->GetParticle(411)->Mass();
1042       minv = rd->InvMass(nprongs,pdg3);
1043       if(TMath::Abs(minv-mPDG)<fDplusCuts[0]) retval=kTRUE;
1044                             // Ds+->KKpi
1045       pdg3[0]=321; pdg3[1]=321; pdg3[2]=211;
1046       mPDG=TDatabasePDG::Instance()->GetParticle(431)->Mass();
1047       minv = rd->InvMass(nprongs,pdg3);
1048       if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
1049       pdg3[0]=211; pdg3[1]=321; pdg3[2]=321;
1050       minv = rd->InvMass(nprongs,pdg3);
1051       if(TMath::Abs(minv-mPDG)<fDsCuts[0]) retval=kTRUE;
1052                             // Lc->pKpi
1053       pdg3[0]=2212; pdg3[1]=321; pdg3[2]=211;
1054       mPDG=TDatabasePDG::Instance()->GetParticle(4122)->Mass();
1055       minv = rd->InvMass(nprongs,pdg3);
1056       if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
1057       pdg3[0]=211; pdg3[1]=321; pdg3[2]=2212;
1058       minv = rd->InvMass(nprongs,pdg3);
1059       if(TMath::Abs(minv-mPDG)<fLcCuts[0]) retval=kTRUE;
1060       break;
1061     default:
1062       break;
1063     }
1064
1065   delete rd;
1066
1067   return retval;
1068 }
1069 //-----------------------------------------------------------------------------
1070 void AliAnalysisVertexingHF::SelectTracksAndCopyVertex(AliVEvent *event,
1071                                           TObjArray &trksP,Int_t &nTrksP,
1072                                           TObjArray &trksN,Int_t &nTrksN)
1073 {
1074   // Fill two TObjArrays with positive and negative tracks and
1075   // apply single-track preselection.
1076   // Create the AliESDVertex object (convert from AliAODVertex if necessary)
1077   // In case of AOD input, also fill fAODMap for track index<->ID
1078
1079   const AliVVertex *vprimary = event->GetPrimaryVertex();
1080
1081   if(fV1) { delete fV1; fV1=NULL; }
1082   if(fAODMap) { delete [] fAODMap; fAODMap=NULL; }
1083
1084   Int_t nindices=0;
1085   UShort_t *indices = 0;
1086   Double_t pos[3],cov[6];
1087
1088   if(!fInputAOD) { // ESD
1089     fV1 = new AliESDVertex(*((AliESDVertex*)vprimary));
1090   } else {         // AOD
1091     vprimary->GetXYZ(pos);
1092     vprimary->GetCovarianceMatrix(cov);
1093     fV1 = new AliESDVertex(pos,cov,100.,100,vprimary->GetName());
1094     indices = new UShort_t[event->GetNumberOfTracks()];
1095     fAODMap = new Int_t[100000];
1096   }
1097
1098
1099   nTrksP=0,nTrksN=0;
1100
1101   Int_t entries = (Int_t)event->GetNumberOfTracks();
1102
1103   // transfer ITS tracks from event to arrays
1104   for(Int_t i=0; i<entries; i++) {
1105
1106     AliVTrack *track = (AliVTrack*)event->GetTrack(i);
1107
1108     if(fInputAOD) {
1109       AliAODTrack *aodt = (AliAODTrack*)track;
1110       if(aodt->GetUsedForPrimVtxFit()) {
1111         indices[nindices]=aodt->GetID(); nindices++;
1112       }
1113       fAODMap[(Int_t)aodt->GetID()] = i;
1114     }
1115
1116     // require refit in ITS
1117     UInt_t status = track->GetStatus();
1118     if(fITSrefit && !(status&AliESDtrack::kITSrefit)) {
1119       AliDebug(2,Form("track %d is not kITSrefit",i));
1120       continue;
1121     }
1122
1123     Int_t ncls0=0;
1124     for(Int_t l=0;l<6;l++) if(TESTBIT(track->GetITSClusterMap(),l)) ncls0++;
1125
1126     // require minimum # of ITS points
1127     if(ncls0<fMinITSCls)  {
1128       AliDebug(2,Form("track %d has %d ITS cls",i,ncls0));
1129       continue;
1130     }
1131     // require points on the 2 pixel layers
1132     if(fBothSPD)
1133       if(!TESTBIT(track->GetITSClusterMap(),0) ||
1134          !TESTBIT(track->GetITSClusterMap(),1)) continue;
1135
1136     AliESDtrack *esdt = 0;
1137     if(!fInputAOD) {
1138       esdt = (AliESDtrack*)track;
1139     } else {
1140       esdt = new AliESDtrack(track);
1141     }
1142
1143     // single track selection
1144     if(!SingleTrkCuts(*esdt)) {
1145       if(fInputAOD) delete esdt;
1146       esdt = NULL;
1147       continue;
1148     }
1149
1150     if(track->Charge()<0) { // negative track
1151       trksN.AddLast(esdt);
1152       nTrksN++;
1153     } else {                 // positive track
1154       trksP.AddLast(esdt);
1155       nTrksP++;
1156     }
1157
1158   } // end loop on tracks
1159
1160   // primary vertex from AOD
1161   if(fInputAOD) {
1162     delete fV1; fV1=NULL;
1163     vprimary->GetXYZ(pos);
1164     vprimary->GetCovarianceMatrix(cov);
1165     Double_t chi2toNDF = vprimary->GetChi2perNDF();
1166     Int_t ncontr=nindices;
1167     if(!strcmp(vprimary->GetTitle(),"VertexerTracksWithContraint")) ncontr += 1;
1168     Double_t chi2=chi2toNDF*(2.*(Double_t)ncontr-3.);
1169     fV1 = new AliESDVertex(pos,cov,chi2,ncontr,vprimary->GetName());
1170     fV1->SetTitle(vprimary->GetTitle());
1171     fV1->SetIndices(nindices,indices);
1172   }
1173   if(indices) { delete [] indices; indices=NULL; }
1174
1175
1176   return;
1177 }
1178 //-----------------------------------------------------------------------------
1179 void AliAnalysisVertexingHF::SetD0toKpiCuts(Double_t cut0,Double_t cut1,
1180                                    Double_t cut2,Double_t cut3,Double_t cut4,
1181                                    Double_t cut5,Double_t cut6,
1182                                    Double_t cut7,Double_t cut8)
1183 {
1184   // Set the cuts for D0 selection
1185   fD0toKpiCuts[0] = cut0;
1186   fD0toKpiCuts[1] = cut1;
1187   fD0toKpiCuts[2] = cut2;
1188   fD0toKpiCuts[3] = cut3;
1189   fD0toKpiCuts[4] = cut4;
1190   fD0toKpiCuts[5] = cut5;
1191   fD0toKpiCuts[6] = cut6;
1192   fD0toKpiCuts[7] = cut7;
1193   fD0toKpiCuts[8] = cut8;
1194
1195   return;
1196 }
1197 //-----------------------------------------------------------------------------
1198 void AliAnalysisVertexingHF::SetD0toKpiCuts(const Double_t cuts[9])
1199 {
1200   // Set the cuts for D0 selection
1201
1202   for(Int_t i=0; i<9; i++) fD0toKpiCuts[i] = cuts[i];
1203
1204   return;
1205 }
1206 //-----------------------------------------------------------------------------
1207 void AliAnalysisVertexingHF::SetBtoJPSICuts(Double_t cut0,Double_t cut1,
1208                                    Double_t cut2,Double_t cut3,Double_t cut4,
1209                                    Double_t cut5,Double_t cut6,
1210                                    Double_t cut7,Double_t cut8)
1211 {
1212   // Set the cuts for J/psi from B selection
1213   fBtoJPSICuts[0] = cut0;
1214   fBtoJPSICuts[1] = cut1;
1215   fBtoJPSICuts[2] = cut2;
1216   fBtoJPSICuts[3] = cut3;
1217   fBtoJPSICuts[4] = cut4;
1218   fBtoJPSICuts[5] = cut5;
1219   fBtoJPSICuts[6] = cut6;
1220   fBtoJPSICuts[7] = cut7;
1221   fBtoJPSICuts[8] = cut8;
1222
1223   return;
1224 }
1225 //-----------------------------------------------------------------------------
1226 void AliAnalysisVertexingHF::SetBtoJPSICuts(const Double_t cuts[9])
1227 {
1228   // Set the cuts for J/psi from B selection
1229
1230   for(Int_t i=0; i<9; i++) fBtoJPSICuts[i] = cuts[i];
1231
1232   return;
1233 }
1234 //-----------------------------------------------------------------------------
1235 void AliAnalysisVertexingHF::SetDplusCuts(Double_t cut0,Double_t cut1,
1236                                    Double_t cut2,Double_t cut3,Double_t cut4,
1237                                    Double_t cut5,Double_t cut6,
1238                                    Double_t cut7,Double_t cut8,
1239                                    Double_t cut9,Double_t cut10,Double_t cut11)
1240 {
1241   // Set the cuts for Dplus->Kpipi selection
1242   fDplusCuts[0] = cut0;
1243   fDplusCuts[1] = cut1;
1244   fDplusCuts[2] = cut2;
1245   fDplusCuts[3] = cut3;
1246   fDplusCuts[4] = cut4;
1247   fDplusCuts[5] = cut5;
1248   fDplusCuts[6] = cut6;
1249   fDplusCuts[7] = cut7;
1250   fDplusCuts[8] = cut8;
1251   fDplusCuts[9] = cut9;
1252   fDplusCuts[10] = cut10;
1253   fDplusCuts[11] = cut11;
1254
1255   return;
1256 }
1257 //-----------------------------------------------------------------------------
1258 void AliAnalysisVertexingHF::SetDplusCuts(const Double_t cuts[12])
1259 {
1260   // Set the cuts for Dplus->Kpipi selection
1261
1262   for(Int_t i=0; i<12; i++) fDplusCuts[i] = cuts[i];
1263
1264   return;
1265 }
1266 //-----------------------------------------------------------------------------
1267 void AliAnalysisVertexingHF::SetDsCuts(Double_t cut0,Double_t cut1,
1268                                    Double_t cut2,Double_t cut3,Double_t cut4,
1269                                    Double_t cut5,Double_t cut6,
1270                                    Double_t cut7,Double_t cut8,
1271                                    Double_t cut9,Double_t cut10,
1272                                    Double_t cut11,Double_t cut12)
1273 {
1274   // Set the cuts for Ds->KKpi selection
1275   fDsCuts[0] = cut0;
1276   fDsCuts[1] = cut1;
1277   fDsCuts[2] = cut2;
1278   fDsCuts[3] = cut3;
1279   fDsCuts[4] = cut4;
1280   fDsCuts[5] = cut5;
1281   fDsCuts[6] = cut6;
1282   fDsCuts[7] = cut7;
1283   fDsCuts[8] = cut8;
1284   fDsCuts[9] = cut9;
1285   fDsCuts[10] = cut10;
1286   fDsCuts[11] = cut11;
1287   fDsCuts[12] = cut12;
1288
1289   return;
1290 }
1291 //-----------------------------------------------------------------------------
1292 void AliAnalysisVertexingHF::SetDsCuts(const Double_t cuts[13])
1293 {
1294   // Set the cuts for Ds->KKpi selection
1295
1296   for(Int_t i=0; i<13; i++) fDsCuts[i] = cuts[i];
1297
1298   return;
1299 }
1300 //-----------------------------------------------------------------------------
1301 void AliAnalysisVertexingHF::SetLcCuts(Double_t cut0,Double_t cut1,
1302                                    Double_t cut2,Double_t cut3,Double_t cut4,
1303                                    Double_t cut5,Double_t cut6,
1304                                    Double_t cut7,Double_t cut8,
1305                                    Double_t cut9,Double_t cut10,Double_t cut11)
1306 {
1307   // Set the cuts for Lc->pKpi selection
1308   fLcCuts[0] = cut0;
1309   fLcCuts[1] = cut1;
1310   fLcCuts[2] = cut2;
1311   fLcCuts[3] = cut3;
1312   fLcCuts[4] = cut4;
1313   fLcCuts[5] = cut5;
1314   fLcCuts[6] = cut6;
1315   fLcCuts[7] = cut7;
1316   fLcCuts[8] = cut8;
1317   fLcCuts[9] = cut9;
1318   fLcCuts[10] = cut10;
1319   fLcCuts[11] = cut11;
1320
1321   return;
1322 }
1323 //-----------------------------------------------------------------------------
1324 void AliAnalysisVertexingHF::SetLcCuts(const Double_t cuts[12])
1325 {
1326   // Set the cuts for Lc->pKpi selection
1327
1328   for(Int_t i=0; i<12; i++) fLcCuts[i] = cuts[i];
1329
1330   return;
1331 }
1332 //-----------------------------------------------------------------------------
1333 Bool_t AliAnalysisVertexingHF::SingleTrkCuts(AliESDtrack& trk) const
1334 {
1335   // Check if track passes some kinematical cuts
1336
1337   if(trk.Pt() < fMinPtCut) {
1338     //printf("pt %f\n",1./trk.GetParameter()[4]);
1339     return kFALSE;
1340   }
1341   Double_t d0z0[2],covd0z0[3];
1342   trk.PropagateToDCA(fV1,fBzkG,kVeryBig,d0z0,covd0z0);
1343   if(TMath::Abs(d0z0[0]) < fMind0rphiCut) {
1344     //printf("d0rphi %f\n",TMath::Abs(d0z0[0]));
1345     return kFALSE;
1346   }
1347
1348   return kTRUE;
1349 }
1350 //-----------------------------------------------------------------------------