PWG/EMCAL/AliEmcalPicoTrackMaker.cxx

   1 // $Id$
   2 //
   3 // Class to make PicoTracks in AOD/ESD events.
   4 //
   5 // Author: S.Aiola, C.Loizides
   6
   7 #include <TClonesArray.h>
   8 #include <TRandom3.h>
   9 #include "AliAODEvent.h"
  10 #include "AliAODTrack.h"
  11 #include "AliAnalysisManager.h"
  12 #include "AliESDtrack.h"
  13 #include "AliESDtrackCuts.h"
  14 #include "AliEmcalPicoTrackMaker.h"
  15 #include "AliLog.h"
  16 #include "AliPicoTrack.h"
  17 #include "AliVTrack.h"
  18
  19 ClassImp(AliEmcalPicoTrackMaker)
  20
  21 //________________________________________________________________________
  22 AliEmcalPicoTrackMaker::AliEmcalPicoTrackMaker() :
  23   AliAnalysisTaskSE("AliEmcalPicoTrackMaker"),
  24   fESDtrackCuts(0),
  25   fTracksOutName("PicoTracks"),
  26   fTracksInName("tracks"),
  27   fMinTrackPt(0),
  28   fMaxTrackPt(1000),
  29   fMinTrackEta(-10),
  30   fMaxTrackEta(10),
  31   fMinTrackPhi(-10),
  32   fMaxTrackPhi(10),
  33   fTrackEfficiency(1),
  34   fIncludeNoITS(kTRUE),
  35   fUseNegativeLabels(kTRUE),
  36   fIsMC(kFALSE),
  37   fCutMaxFractionSharedTPCClusters(0.4),
  38   fTracksIn(0),
  39   fTracksOut(0)
  40 {
  41   // Constructor.
  42
  43   fAODfilterBits[0] = -1;
  44   fAODfilterBits[1] = -1;
  45 }
  46
  47 //________________________________________________________________________
  48 AliEmcalPicoTrackMaker::AliEmcalPicoTrackMaker(const char *name) :
  49   AliAnalysisTaskSE(name),
  50   fESDtrackCuts(0),
  51   fTracksOutName("PicoTracks"),
  52   fTracksInName("tracks"),
  53   fMinTrackPt(0),
  54   fMaxTrackPt(1000),
  55   fMinTrackEta(-10),
  56   fMaxTrackEta(10),
  57   fMinTrackPhi(-10),
  58   fMaxTrackPhi(10),
  59   fTrackEfficiency(1),
  60   fIncludeNoITS(kTRUE),
  61   fUseNegativeLabels(kTRUE),
  62   fIsMC(kFALSE),
  63   fCutMaxFractionSharedTPCClusters(0.4),
  64   fTracksIn(0),
  65   fTracksOut(0)
  66 {
  67   // Constructor.
  68
  69   fAODfilterBits[0] = -1;
  70   fAODfilterBits[1] = -1;
  71   fBranchNames = "ESD:AliESDHeader.,AliESDRun.,SPDVertex.,Tracks";
  72 }
  73
  74 //________________________________________________________________________
  75 AliEmcalPicoTrackMaker::~AliEmcalPicoTrackMaker()
  76 {
  77   // Destructor.
  78 }
  79
  80 //________________________________________________________________________
  81 void AliEmcalPicoTrackMaker::UserCreateOutputObjects()
  82 {
  83   // Create my user objects.
  84
  85   fTracksOut = new TClonesArray("AliPicoTrack");
  86   fTracksOut->SetName(fTracksOutName);
  87 }
  88
  89 //________________________________________________________________________
  90 void AliEmcalPicoTrackMaker::UserExec(Option_t *)
  91 {
  92   // Main loop, called for each event.
  93
  94   AliAnalysisManager *am = AliAnalysisManager::GetAnalysisManager();
  95   if (!am) {
  96     AliError("Manager zero, returning");
  97     return;
  98   }
  99
 100   // retrieve tracks from input.
 101   if (!fTracksIn) {
 102     fTracksIn = dynamic_cast<TClonesArray*>(InputEvent()->FindListObject(fTracksInName));
 103     if (!fTracksIn) {
 104       AliError(Form("Could not retrieve tracks %s!", fTracksInName.Data()));
 105       return;
 106     }
 107     if (!fTracksIn->GetClass()->GetBaseClass("AliVParticle")) {
 108       AliError(Form("%s: Collection %s does not contain AliVParticle objects!", GetName(), fTracksInName.Data()));
 109       return;
 110     }
 111   }
 112
 113   // add tracks to event if not yet there
 114   fTracksOut->Delete();
 115   if (!(InputEvent()->FindListObject(fTracksOutName))) {
 116     InputEvent()->AddObject(fTracksOut);
 117   }
 118
 119   // clear container (normally a null operation as the event should clean it already)
 120   fTracksOut->Clear();
 121
 122   // test if we are in ESD or AOD mode
 123   Bool_t esdMode = kTRUE;
 124   if (dynamic_cast<AliAODEvent*>(InputEvent())!=0)
 125     esdMode = kFALSE;
 126
 127   // loop over tracks
 128   const Int_t Ntracks = fTracksIn->GetEntriesFast();
 129   for (Int_t iTracks = 0, nacc = 0; iTracks < Ntracks; ++iTracks) {
 130
 131     AliVTrack *track = static_cast<AliVTrack*>(fTracksIn->At(iTracks));
 132
 133     if (!track)
 134       continue;
 135
 136     if (track->Pt() > fMaxTrackPt || track->Pt() < fMinTrackPt)
 137       continue;
 138
 139     if (track->Eta() < fMinTrackEta || track->Eta() > fMaxTrackEta ||
 140         track->Phi() < fMinTrackPhi || track->Phi() > fMaxTrackPhi)
 141       continue;
 142
 143     Bool_t isEmc = kFALSE;
 144     Int_t type = -1;
 145     if (esdMode) {
 146       AliESDtrack *esdtrack = static_cast<AliESDtrack*>(track);
 147       if (fESDtrackCuts && !fESDtrackCuts->AcceptTrack(esdtrack))
 148         continue;
 149       type = esdtrack->GetTRDNchamberdEdx();
 150       if (!fIncludeNoITS && (type==2))
 151         continue;
 152       isEmc = track->IsEMCAL();
 153     } else {
 154       AliAODTrack *aodtrack = static_cast<AliAODTrack*>(track);
 155       if (fAODfilterBits[0] < 0) {
 156         if (aodtrack->IsHybridGlobalConstrainedGlobal())
 157           type = 3;
 158         else /*not a good track*/
 159           continue;
 160       } else {
 161         if (aodtrack->TestFilterBit(fAODfilterBits[0])) {
 162           type = 0;
 163         } else if (aodtrack->TestFilterBit(fAODfilterBits[1])) {
 164           if ((aodtrack->GetStatus()&AliESDtrack::kITSrefit)==0) {
 165             if (fIncludeNoITS)
 166               type = 2;
 167             else
 168               continue;
 169           } else {
 170             type = 1;
 171           }
 172         }
 173         else {/*not a good track*/
 174           continue;
 175         }
 176       }
 177       if (fCutMaxFractionSharedTPCClusters > 0) {
 178         Double_t frac = Double_t(aodtrack->GetTPCnclsS()) / Double_t(aodtrack->GetTPCncls());
 179         if (frac > fCutMaxFractionSharedTPCClusters)
 180           continue;
 181       }
 182       if (TMath::Abs(track->GetTrackEtaOnEMCal()) < 0.75 &&
 183           track->GetTrackPhiOnEMCal() > 70 * TMath::DegToRad() &&
 184           track->GetTrackPhiOnEMCal() < 190 * TMath::DegToRad())
 185         isEmc = kTRUE;
 186     }
 187
 188     if (fTrackEfficiency < 1) {
 189       Double_t r = gRandom->Rndm();
 190       if (fTrackEfficiency < r)
 191         continue;
 192     }
 193
 194     Int_t label = 0;
 195     if (fIsMC) {
 196       if (fUseNegativeLabels)
 197         label = track->GetLabel();
 198       else
 199         label = TMath::Abs(track->GetLabel());
 200
 201       if (label == 0)
 202         AliDebug(2,Form("Track %d with label==0", iTracks));
 203     }
 204
 205     /*AliPicoTrack *picotrack =*/ new ((*fTracksOut)[nacc]) AliPicoTrack(track->Pt(),
 206                                                                          track->Eta(),
 207                                                                          track->Phi(),
 208                                                                          track->Charge(),
 209                                                                          label,
 210                                                                          type,
 211                                                                          track->GetTrackEtaOnEMCal(),
 212                                                                          track->GetTrackPhiOnEMCal(),
 213                                                                          track->GetTrackPtOnEMCal(),
 214                                                                          isEmc);
 215     ++nacc;
 216   }
 217 }