PWG3/vertexingHF/AliAnalysisTaskSESelectHF.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-2008, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
   5  * Contributors are mentioned in the code where appropriate.              *
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   7  * Permission to use, copy, modify and distribute this software and its   *
   8  * documentation strictly for non-commercial purposes is hereby granted   *
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  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 //
  18 // AliAnalysisTaskSE for the selection of heavy flavor
  19 // decay candidates and creation a stand-alone AOD.
  20 //
  21 // Author: A.Dainese, andrea.dainese@lnl.infn.it
  22 /////////////////////////////////////////////////////////////
  23
  24 #include <TClonesArray.h>
  25
  26 #include "AliAnalysisManager.h"
  27 #include "AliAODHandler.h"
  28 #include "AliAODEvent.h"
  29 #include "AliAODVertex.h"
  30 #include "AliAODTrack.h"
  31 #include "AliAODRecoDecayHF2Prong.h"
  32 #include "AliAnalysisVertexingHF.h"
  33 #include "AliAnalysisTaskSE.h"
  34 #include "AliAnalysisTaskSESelectHF.h"
  35
  36 ClassImp(AliAnalysisTaskSESelectHF)
  37
  38
  39 //________________________________________________________________________
  40 AliAnalysisTaskSESelectHF::AliAnalysisTaskSESelectHF():
  41 AliAnalysisTaskSE(),
  42 fVerticesHFTClArr(0),
  43 fD0toKpiTClArr(0),
  44 fVHF(0)
  45 {
  46   // Default constructor
  47 }
  48
  49 //________________________________________________________________________
  50 AliAnalysisTaskSESelectHF::AliAnalysisTaskSESelectHF(const char *name):
  51 AliAnalysisTaskSE(name),
  52 fVerticesHFTClArr(0),
  53 fD0toKpiTClArr(0),
  54 fVHF(0)
  55 {
  56   // Default constructor
  57 }
  58
  59 //________________________________________________________________________
  60 AliAnalysisTaskSESelectHF::~AliAnalysisTaskSESelectHF()
  61 {
  62   // Destructor
  63
  64   if (fVHF) {
  65     delete fVHF;
  66     fVHF = 0;
  67   }
  68
  69 }
  70
  71 //________________________________________________________________________
  72 void AliAnalysisTaskSESelectHF::Init()
  73 {
  74   // Initialization
  75
  76   if(fDebug > 1) printf("AnalysisTaskSESelectHF::Init() \n");
  77
  78   gROOT->LoadMacro("ConfigVertexingHF.C");
  79
  80   fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
  81   fVHF->PrintStatus();
  82
  83   return;
  84 }
  85
  86 //________________________________________________________________________
  87 void AliAnalysisTaskSESelectHF::UserCreateOutputObjects()
  88 {
  89   // Create the output container
  90   //
  91   if(fDebug > 1) printf("AnalysisTaskSESelectHF::UserCreateOutputObjects() \n");
  92
  93   fVerticesHFTClArr = new TClonesArray("AliAODVertex", 0);
  94   fVerticesHFTClArr->SetName("VerticesHF");
  95   AddAODBranch("TClonesArray", &fVerticesHFTClArr);
  96
  97   fD0toKpiTClArr = new TClonesArray("AliAODRecoDecayHF2Prong", 0);
  98   fD0toKpiTClArr->SetName("D0toKpi");
  99   AddAODBranch("TClonesArray", &fD0toKpiTClArr);
 100
 101   return;
 102 }
 103
 104 //________________________________________________________________________
 105 void AliAnalysisTaskSESelectHF::UserExec(Option_t */*option*/)
 106 {
 107   // Execute analysis for current event:
 108   // heavy flavor candidates selection and histograms
 109
 110   AliAODEvent *aodIn = dynamic_cast<AliAODEvent*> (InputEvent());
 111
 112   TClonesArray *inputArrayD0toKpi = 0;
 113
 114   if(!aodIn && AODEvent() && IsStandardAOD()) {
 115     // In case there is an AOD handler writing a standard AOD, use the AOD
 116     // event in memory rather than the input (ESD) event.
 117     aodIn = dynamic_cast<AliAODEvent*> (AODEvent());
 118     // in this case the braches in the deltaAOD (AliAOD.VertexingHF.root)
 119     // have to taken from the AOD event hold by the AliAODExtension
 120     AliAODHandler* aodHandler = (AliAODHandler*)
 121       ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 122     if(aodHandler->GetExtensions()) {
 123       AliAODExtension *ext = (AliAODExtension*)aodHandler->GetExtensions()->FindObject("AliAOD.VertexingHF.root");
 124       AliAODEvent *aodFromExt = ext->GetAOD();
 125       // load D0 candidates
 126       inputArrayD0toKpi=(TClonesArray*)aodFromExt->GetList()->FindObject("D0toKpi");
 127     }
 128   } else {
 129     // load D0 candidates
 130     inputArrayD0toKpi=(TClonesArray*)aodIn->GetList()->FindObject("D0toKpi");
 131   }
 132
 133   if(!inputArrayD0toKpi) {
 134     printf("AliAnalysisTaskSESelectHF::UserExec: D0toKpi branch not found!\n");
 135     return;
 136   }
 137
 138   //print event info
 139   //aodIn->GetHeader()->Print();
 140
 141   // primary vertex
 142   AliAODVertex *vtx1 = (AliAODVertex*)aodIn->GetPrimaryVertex();
 143   //vtx1->Print();
 144
 145   // make trkIDtoEntry register (temporary)
 146   Int_t trkIDtoEntry[100000];
 147   for(Int_t it=0;it<aodIn->GetNumberOfTracks();it++) {
 148     AliAODTrack *track = aodIn->GetTrack(it);
 149     trkIDtoEntry[track->GetID()]=it;
 150   }
 151
 152   Int_t iOutVerticesHF=0,iOutD0toKpi=0;
 153   fVerticesHFTClArr->Delete();
 154   iOutVerticesHF = fVerticesHFTClArr->GetEntriesFast();
 155   TClonesArray &verticesHFRef = *fVerticesHFTClArr;
 156   fD0toKpiTClArr->Delete();
 157   iOutD0toKpi = fD0toKpiTClArr->GetEntriesFast();
 158   TClonesArray &aodD0toKpiRef = *fD0toKpiTClArr;
 159
 160
 161   // loop over D0->Kpi candidates
 162   Int_t nInD0toKpi = inputArrayD0toKpi->GetEntriesFast();
 163   printf("Number of D0->Kpi: %d\n",nInD0toKpi);
 164
 165   for (Int_t iD0toKpi = 0; iD0toKpi < nInD0toKpi; iD0toKpi++) {
 166     AliAODRecoDecayHF2Prong *dIn = (AliAODRecoDecayHF2Prong*)inputArrayD0toKpi->UncheckedAt(iD0toKpi);
 167     Bool_t unsetvtx=kFALSE;
 168     if(!dIn->GetOwnPrimaryVtx()) {
 169       dIn->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
 170       unsetvtx=kTRUE;
 171     }
 172     Int_t okD0=0,okD0bar=0;
 173     if(dIn->SelectD0(fVHF->GetD0toKpiCuts(),okD0,okD0bar)) {
 174       // get daughter AOD tracks
 175       AliAODTrack *trk0 = (AliAODTrack*)dIn->GetDaughter(0);
 176       AliAODTrack *trk1 = (AliAODTrack*)dIn->GetDaughter(1);
 177       if(!trk0 || !trk1) {
 178         trk0=aodIn->GetTrack(trkIDtoEntry[dIn->GetProngID(0)]);
 179         trk1=aodIn->GetTrack(trkIDtoEntry[dIn->GetProngID(1)]);
 180       }
 181       printf("pt of positive track: %f\n",trk0->Pt());
 182       printf("pt of negative track: %f\n",trk1->Pt());
 183       // HERE ONE COULD RECALCULATE THE VERTEX USING THE KF PACKAGE
 184
 185       // clone candidate for output AOD
 186       AliAODVertex *v = new(verticesHFRef[iOutVerticesHF++])
 187         AliAODVertex(*(dIn->GetSecondaryVtx()));
 188       AliAODRecoDecayHF2Prong *dOut=new(aodD0toKpiRef[iOutD0toKpi++])
 189         AliAODRecoDecayHF2Prong(*dIn);
 190       dOut->SetSecondaryVtx(v);
 191       dOut->SetOwnPrimaryVtx((AliAODVertex*)((dIn->GetOwnPrimaryVtx())->Clone()));
 192       v->SetParent(dOut);
 193     }
 194     if(unsetvtx) dIn->UnsetOwnPrimaryVtx();
 195   } // end loop on D0->Kpi
 196
 197   printf("Number of selected D0->Kpi: %d\n",iOutD0toKpi);
 198
 199
 200   return;
 201 }
 202
 203 //________________________________________________________________________
 204 void AliAnalysisTaskSESelectHF::Terminate(Option_t */*option*/)
 205 {
 206   // Terminate analysis
 207   //
 208   if(fDebug > 1) printf("AnalysisTaskSESelectHF: Terminate() \n");
 209 }
 210