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. *
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 **************************************************************************/
16 /////////////////////////////////////////////////////////////
18 // AliAnalysisTaskSE for the selection of heavy flavor
19 // decay candidates and creation a stand-alone AOD.
21 // Author: A.Dainese, andrea.dainese@lnl.infn.it
22 /////////////////////////////////////////////////////////////
24 #include <TClonesArray.h>
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"
36 ClassImp(AliAnalysisTaskSESelectHF)
39 //________________________________________________________________________
40 AliAnalysisTaskSESelectHF::AliAnalysisTaskSESelectHF():
46 // Default constructor
49 //________________________________________________________________________
50 AliAnalysisTaskSESelectHF::AliAnalysisTaskSESelectHF(const char *name):
51 AliAnalysisTaskSE(name),
56 // Default constructor
59 //________________________________________________________________________
60 AliAnalysisTaskSESelectHF::~AliAnalysisTaskSESelectHF()
71 //________________________________________________________________________
72 void AliAnalysisTaskSESelectHF::Init()
76 if(fDebug > 1) printf("AnalysisTaskSESelectHF::Init() \n");
78 gROOT->LoadMacro("ConfigVertexingHF.C");
80 fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
86 //________________________________________________________________________
87 void AliAnalysisTaskSESelectHF::UserCreateOutputObjects()
89 // Create the output container
91 if(fDebug > 1) printf("AnalysisTaskSESelectHF::UserCreateOutputObjects() \n");
93 fVerticesHFTClArr = new TClonesArray("AliAODVertex", 0);
94 fVerticesHFTClArr->SetName("VerticesHF");
95 AddAODBranch("TClonesArray", &fVerticesHFTClArr);
97 fD0toKpiTClArr = new TClonesArray("AliAODRecoDecayHF2Prong", 0);
98 fD0toKpiTClArr->SetName("D0toKpi");
99 AddAODBranch("TClonesArray", &fD0toKpiTClArr);
104 //________________________________________________________________________
105 void AliAnalysisTaskSESelectHF::UserExec(Option_t */*option*/)
107 // Execute analysis for current event:
108 // heavy flavor candidates selection and histograms
110 AliAODEvent *aodIn = dynamic_cast<AliAODEvent*> (InputEvent());
112 TClonesArray *inputArrayD0toKpi = 0;
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");
129 // load D0 candidates
130 inputArrayD0toKpi=(TClonesArray*)aodIn->GetList()->FindObject("D0toKpi");
133 if(!inputArrayD0toKpi) {
134 printf("AliAnalysisTaskSESelectHF::UserExec: D0toKpi branch not found!\n");
139 //aodIn->GetHeader()->Print();
142 AliAODVertex *vtx1 = (AliAODVertex*)aodIn->GetPrimaryVertex();
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;
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;
161 // loop over D0->Kpi candidates
162 Int_t nInD0toKpi = inputArrayD0toKpi->GetEntriesFast();
163 printf("Number of D0->Kpi: %d\n",nInD0toKpi);
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
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);
178 trk0=aodIn->GetTrack(trkIDtoEntry[dIn->GetProngID(0)]);
179 trk1=aodIn->GetTrack(trkIDtoEntry[dIn->GetProngID(1)]);
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
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()));
194 if(unsetvtx) dIn->UnsetOwnPrimaryVtx();
195 } // end loop on D0->Kpi
197 printf("Number of selected D0->Kpi: %d\n",iOutD0toKpi);
203 //________________________________________________________________________
204 void AliAnalysisTaskSESelectHF::Terminate(Option_t */*option*/)
206 // Terminate analysis
208 if(fDebug > 1) printf("AnalysisTaskSESelectHF: Terminate() \n");