1 /**************************************************************************
2 * Copyright(c) 1998-2008, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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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 **************************************************************************/
18 /////////////////////////////////////////////////////////////
20 // AliAnalysisTaskSE for the selection of heavy flavor
21 // decay candidates and creation a stand-alone AOD.
23 // Author: A.Dainese, andrea.dainese@lnl.infn.it
24 /////////////////////////////////////////////////////////////
26 #include <TClonesArray.h>
28 #include "AliAnalysisManager.h"
29 #include "AliAODHandler.h"
30 #include "AliAODEvent.h"
31 #include "AliAODVertex.h"
32 #include "AliAODTrack.h"
33 #include "AliAODRecoDecayHF2Prong.h"
34 #include "AliAnalysisVertexingHF.h"
35 #include "AliAnalysisTaskSE.h"
36 #include "AliAnalysisTaskSESelectHF.h"
38 ClassImp(AliAnalysisTaskSESelectHF)
41 //________________________________________________________________________
42 AliAnalysisTaskSESelectHF::AliAnalysisTaskSESelectHF():
48 // Default constructor
51 //________________________________________________________________________
52 AliAnalysisTaskSESelectHF::AliAnalysisTaskSESelectHF(const char *name):
53 AliAnalysisTaskSE(name),
58 // Default constructor
61 //________________________________________________________________________
62 AliAnalysisTaskSESelectHF::~AliAnalysisTaskSESelectHF()
73 //________________________________________________________________________
74 void AliAnalysisTaskSESelectHF::Init()
78 if(fDebug > 1) printf("AnalysisTaskSESelectHF::Init() \n");
80 gROOT->LoadMacro("ConfigVertexingHF.C");
82 fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
88 //________________________________________________________________________
89 void AliAnalysisTaskSESelectHF::UserCreateOutputObjects()
91 // Create the output container
93 if(fDebug > 1) printf("AnalysisTaskSESelectHF::UserCreateOutputObjects() \n");
95 fVerticesHFTClArr = new TClonesArray("AliAODVertex", 0);
96 fVerticesHFTClArr->SetName("VerticesHF");
97 AddAODBranch("TClonesArray", &fVerticesHFTClArr);
99 fD0toKpiTClArr = new TClonesArray("AliAODRecoDecayHF2Prong", 0);
100 fD0toKpiTClArr->SetName("D0toKpi");
101 AddAODBranch("TClonesArray", &fD0toKpiTClArr);
106 //________________________________________________________________________
107 void AliAnalysisTaskSESelectHF::UserExec(Option_t */*option*/)
109 // Execute analysis for current event:
110 // heavy flavor candidates selection and histograms
112 AliAODEvent *aodIn = dynamic_cast<AliAODEvent*> (InputEvent());
114 TClonesArray *inputArrayD0toKpi = 0;
116 if(!aodIn && AODEvent() && IsStandardAOD()) {
117 // In case there is an AOD handler writing a standard AOD, use the AOD
118 // event in memory rather than the input (ESD) event.
119 aodIn = dynamic_cast<AliAODEvent*> (AODEvent());
120 // in this case the braches in the deltaAOD (AliAOD.VertexingHF.root)
121 // have to taken from the AOD event hold by the AliAODExtension
122 AliAODHandler* aodHandler = (AliAODHandler*)
123 ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
124 if(aodHandler->GetExtensions()) {
125 AliAODExtension *ext = (AliAODExtension*)aodHandler->GetExtensions()->FindObject("AliAOD.VertexingHF.root");
126 AliAODEvent *aodFromExt = ext->GetAOD();
127 // load D0 candidates
128 inputArrayD0toKpi=(TClonesArray*)aodFromExt->GetList()->FindObject("D0toKpi");
131 // load D0 candidates
132 inputArrayD0toKpi=(TClonesArray*)aodIn->GetList()->FindObject("D0toKpi");
135 if(!inputArrayD0toKpi || !aodIn) {
136 printf("AliAnalysisTaskSESelectHF::UserExec: D0toKpi branch not found!\n");
141 //aodIn->GetHeader()->Print();
144 AliAODVertex *vtx1 = (AliAODVertex*)aodIn->GetPrimaryVertex();
147 // make trkIDtoEntry register (temporary)
148 Int_t trkIDtoEntry[100000];
149 for(Int_t it=0;it<aodIn->GetNumberOfTracks();it++) {
150 AliAODTrack *track = aodIn->GetTrack(it);
151 trkIDtoEntry[track->GetID()]=it;
154 Int_t iOutVerticesHF=0,iOutD0toKpi=0;
155 fVerticesHFTClArr->Delete();
156 iOutVerticesHF = fVerticesHFTClArr->GetEntriesFast();
157 TClonesArray &verticesHFRef = *fVerticesHFTClArr;
158 fD0toKpiTClArr->Delete();
159 iOutD0toKpi = fD0toKpiTClArr->GetEntriesFast();
160 TClonesArray &aodD0toKpiRef = *fD0toKpiTClArr;
163 // loop over D0->Kpi candidates
164 Int_t nInD0toKpi = inputArrayD0toKpi->GetEntriesFast();
165 printf("Number of D0->Kpi: %d\n",nInD0toKpi);
167 for (Int_t iD0toKpi = 0; iD0toKpi < nInD0toKpi; iD0toKpi++) {
168 AliAODRecoDecayHF2Prong *dIn = (AliAODRecoDecayHF2Prong*)inputArrayD0toKpi->UncheckedAt(iD0toKpi);
169 Bool_t unsetvtx=kFALSE;
170 if(!dIn->GetOwnPrimaryVtx()) {
171 dIn->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
175 //Int_t okD0=0,okD0bar=0;
176 //if(dIn->SelectD0(fVHF->GetD0toKpiCuts(),okD0,okD0bar)) {
177 // get daughter AOD tracks
178 AliAODTrack *trk0 = (AliAODTrack*)dIn->GetDaughter(0);
179 AliAODTrack *trk1 = (AliAODTrack*)dIn->GetDaughter(1);
181 trk0=aodIn->GetTrack(trkIDtoEntry[dIn->GetProngID(0)]);
182 trk1=aodIn->GetTrack(trkIDtoEntry[dIn->GetProngID(1)]);
184 printf("pt of positive track: %f\n",trk0->Pt());
185 printf("pt of negative track: %f\n",trk1->Pt());
186 // HERE ONE COULD RECALCULATE THE VERTEX USING THE KF PACKAGE
188 // clone candidate for output AOD
189 AliAODVertex *v = new(verticesHFRef[iOutVerticesHF++])
190 AliAODVertex(*(dIn->GetSecondaryVtx()));
191 AliAODRecoDecayHF2Prong *dOut=new(aodD0toKpiRef[iOutD0toKpi++])
192 AliAODRecoDecayHF2Prong(*dIn);
193 dOut->SetSecondaryVtx(v);
194 dOut->SetOwnPrimaryVtx((AliAODVertex*)((dIn->GetOwnPrimaryVtx())->Clone()));
198 if(unsetvtx) dIn->UnsetOwnPrimaryVtx();
199 } // end loop on D0->Kpi
201 printf("Number of selected D0->Kpi: %d\n",iOutD0toKpi);
207 //________________________________________________________________________
208 void AliAnalysisTaskSESelectHF::Terminate(Option_t */*option*/)
210 // Terminate analysis
212 if(fDebug > 1) printf("AnalysisTaskSESelectHF: Terminate() \n");