7 #include "AliAnalysisTaskME.h"
8 #include "AliAnalysisManager.h"
10 #include "AliAODEvent.h"
11 #include "AliAODTrack.h"
12 #include "AliAODVertex.h"
13 #include "AliMultiEventInputHandler.h"
14 #include "AliAODHandler.h"
16 #include "AliAnalysisTaskCreateMixedDimuons.h"
17 #include "AliEventPoolMuon.h"
18 #include "TDatabasePDG.h"
21 // Example of an analysis task creating aod events filled with mixed muon pairs
23 // Authors Alessandro De Falco and Antonio Uras, INFN Cagliari
24 // alessandro.de.falco@ca.infn.it antonio.uras@ca.infn.it
26 #define AliAnalysisTaskCreateMixedDimuons_CXX
28 ClassImp(AliAnalysisTaskCreateMixedDimuons)
30 //=================================================================================
32 AliAnalysisTaskCreateMixedDimuons::AliAnalysisTaskCreateMixedDimuons(const char *name)
33 : AliAnalysisTaskME(name),
35 fOutputUserHandler(0x0),
37 fOutputUserAODTree(0X0),
44 // Default input and output containers
45 DefineInput (0, TChain::Class());
47 // User-defined input and output containers
48 DefineOutput(1, TTree::Class());
50 // ---------------------------------------------------------------
57 for (Int_t i=0; i<100; i++) fInputAOD[i] = 0;
59 fOutputUserHandler = 0;
61 fOutputUserAODTree = 0;
65 //=================================================================================
67 void AliAnalysisTaskCreateMixedDimuons::ConnectInputData(Option_t *) {
69 // Connect ESD or AOD here
72 printf("-> AliAnalysisTaskCreateMixedDimuons::ConnectInputData\n");
74 TTree* tree = (TTree*) GetInputData(0);
77 Printf("ERROR: Could not read chain from input slot 0");
81 fInputHandler = (AliMultiEventInputHandler*) AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler();
82 fPoolMuon = (AliEventPoolMuon*) AliAnalysisManager::GetAnalysisManager()->GetEventPool();
83 fBufferSize = fInputHandler->GetBufferSize();
84 if (fBufferSize>100) {
85 printf("\n*** WARNING AliAnalysisTaskCreateMixedDimuons::ConnectInputData -> Trying to set fBufferSize>100, forcing fBufferSize=100 ***\n\n");
89 if (!fInputHandler) Printf("ERROR: Could not get AliMultiAODInputHandler");
90 else for (Int_t i=0; i<fBufferSize; i++) fInputAOD[i] = (AliAODEvent*) fInputHandler->GetEvent(i);
93 printf("<- AliAnalysisTaskCreateMixedDimuons::ConnectInputData\n");
97 //=================================================================================
99 void AliAnalysisTaskCreateMixedDimuons::UserCreateOutputObjects() {
101 // Here the user-defined output containers should be created!!!
104 fOutputUserHandler = new AliAODHandler();
106 fOutputUserHandler -> Init("");
108 fOutputUserAOD = fOutputUserHandler -> GetAOD();
110 fOutputUserAODTree = fOutputUserHandler -> GetTree();
114 //=================================================================================
116 void AliAnalysisTaskCreateMixedDimuons::UserExec(Option_t *) {
118 if (!fOutputUserAOD) {
119 Printf("ERROR: fOutputUserAOD not available\n");
123 printf("Calling USER EXEC\n\n");
125 for (Int_t iEv=0; iEv<fBufferSize; iEv++) {
126 if (!fInputAOD[iEv]) {
127 Printf("ERROR: fInputAOD[%d] not available\n",iEv);
131 for (Int_t jEv=0; jEv<iEv; jEv++) {
134 Printf("ERROR: fInputAOD not available\n");
138 Int_t nTracksEv[2] = {0};
139 Int_t nFWMuonsEv[2] = {0};
141 nTracksEv[0] = fInputAOD[iEv]->GetNTracks();
142 nTracksEv[1] = fInputAOD[jEv]->GetNTracks();
144 for (Int_t i=0; i<nTracksEv[0]; i++) if(fInputAOD[iEv]->GetTrack(i)->IsMuonTrack()) nFWMuonsEv[0]++;
145 for (Int_t i=0; i<nTracksEv[1]; i++) if(fInputAOD[jEv]->GetTrack(i)->IsMuonTrack()) nFWMuonsEv[1]++;
147 // Muon track mixing to fill a mass spectrum
149 if (nFWMuonsEv[0] && nFWMuonsEv[1]) {
151 Int_t rndMuonTrack[2] = {0};
152 rndMuonTrack[0] = gRandom->Integer(nFWMuonsEv[0]);
153 rndMuonTrack[1] = gRandom->Integer(nFWMuonsEv[1]);
155 Int_t nFWMUonsAdded = 0;
156 Int_t nPosTracksAdded = 0;
157 Int_t nNegTracksAdded = 0;
159 AliAODVertex *vertex = new AliAODVertex();
162 vertex -> SetZ(fPoolMuon->GetMeanPrimaryVertexZ());
164 Int_t muonCounter[2] = {0};
166 // adding tracks and vertex to the output event...
168 for (Int_t i=0; i<nTracksEv[0]; i++) {
169 if(fInputAOD[iEv]->GetTrack(i)->IsMuonTrack()) {
170 if (fDebug) printf("fInputAOD[%d]->GetTrack(%d) = %p pt = %f uniqueID = %d\n",
171 iEv,i,fInputAOD[iEv]->GetTrack(i),fInputAOD[iEv]->GetTrack(i)->Pt(),
172 fInputAOD[iEv]->GetTrack(i)->GetUniqueID());
173 if (muonCounter[0]==rndMuonTrack[0]) {
174 fOutputUserAOD->AddTrack(fInputAOD[iEv]->GetTrack(i));
176 if (fInputAOD[iEv]->GetTrack(i)->Charge()>0) nPosTracksAdded++;
177 else nNegTracksAdded++;
183 for (Int_t i=0; i<nTracksEv[1]; i++) {
184 if(fInputAOD[jEv]->GetTrack(i)->IsMuonTrack()) {
185 if (fDebug) printf("fInputAOD[%d]->GetTrack(%d) = %p pt = %f uniqueID = %d\n",
186 jEv,i,fInputAOD[jEv]->GetTrack(i),fInputAOD[jEv]->GetTrack(i)->Pt(),
187 fInputAOD[jEv]->GetTrack(i)->GetUniqueID());
188 if (muonCounter[1]==rndMuonTrack[1]) {
189 fOutputUserAOD->AddTrack(fInputAOD[jEv]->GetTrack(i));
191 if (fInputAOD[jEv]->GetTrack(i)->Charge()>0) nPosTracksAdded++;
192 else nNegTracksAdded++;
198 fOutputUserAOD->AddVertex(vertex);
203 for (Int_t i=0; i<nFWMUonsAdded; i++) {
204 AliAODTrack *tr = (AliAODTrack*) fOutputUserAOD->GetTrack(i);
205 printf("fOutputUserAOD->GetTrack(%d) = %p pt = %f\n",i,tr,tr->Pt());
209 fOutputUserAOD->GetHeader()->SetRefMultiplicity(nFWMUonsAdded);
210 fOutputUserAOD->GetHeader()->SetRefMultiplicityPos(nPosTracksAdded);
211 fOutputUserAOD->GetHeader()->SetRefMultiplicityNeg(nNegTracksAdded);
213 fOutputUserHandler -> FinishEvent();
217 PostData(1, fOutputUserAODTree);
225 //===================================================================================
227 void AliAnalysisTaskCreateMixedDimuons::Terminate(Option_t *) {
229 // Called once at the end of the query
231 printf("\n\nCalling TERMINATE \n\n\n");
233 fOutputUserHandler -> Terminate();
237 //===================================================================================