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Commit | Line | Data |
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cc2b5fb5 | 1 | // $Id$ |
b0a53615 | 2 | // |
cdd4e0e2 | 3 | // Task to filter Esd tracks and propagate to Emcal surface. |
b0a53615 | 4 | // |
cd231d42 | 5 | // Author: C.Loizides |
cc2b5fb5 | 6 | |
7 | #include <TClonesArray.h> | |
8 | #include <TGeoGlobalMagField.h> | |
fe75ca27 CL |
9 | #include <AliAnalysisManager.h> |
10 | #include <AliESDEvent.h> | |
11 | #include <AliESDtrackCuts.h> | |
12 | #include <AliMagF.h> | |
13 | #include <AliTrackerBase.h> | |
14 | #include <AliEMCALRecoUtils.h> | |
35fb503f | 15 | |
cdd4e0e2 | 16 | #include "AliEmcalEsdTrackFilterTask.h" |
cc2b5fb5 | 17 | |
cdd4e0e2 | 18 | ClassImp(AliEmcalEsdTrackFilterTask) |
cc2b5fb5 | 19 | |
20 | //________________________________________________________________________ | |
cdd4e0e2 CL |
21 | AliEmcalEsdTrackFilterTask::AliEmcalEsdTrackFilterTask() : |
22 | AliAnalysisTaskSE("AliEmcalEsdTrackFilterTask"), | |
cc2b5fb5 | 23 | fEsdTrackCuts(0), |
4d1e3842 | 24 | fDoSpdVtxCon(0), |
57184cc6 | 25 | fHybridTrackCuts(0), |
cc2b5fb5 | 26 | fTracksName(), |
6231f841 | 27 | fIncludeNoITS(kTRUE), |
35fb503f | 28 | fDoPropagation(kFALSE), |
af2f024d | 29 | fDist(440), |
cc2b5fb5 | 30 | fEsdEv(0), |
31 | fTracks(0) | |
32 | { | |
a93ef37c | 33 | // Constructor. |
cc2b5fb5 | 34 | } |
35 | ||
36 | //________________________________________________________________________ | |
cdd4e0e2 | 37 | AliEmcalEsdTrackFilterTask::AliEmcalEsdTrackFilterTask(const char *name) : |
cc2b5fb5 | 38 | AliAnalysisTaskSE(name), |
39 | fEsdTrackCuts(0), | |
4d1e3842 | 40 | fDoSpdVtxCon(0), |
57184cc6 | 41 | fHybridTrackCuts(0), |
cdd4e0e2 | 42 | fTracksName("EsdTracksOut"), |
6231f841 | 43 | fIncludeNoITS(kTRUE), |
35fb503f | 44 | fDoPropagation(kFALSE), |
af2f024d | 45 | fDist(440), |
cc2b5fb5 | 46 | fEsdEv(0), |
47 | fTracks(0) | |
48 | { | |
a93ef37c | 49 | // Constructor. |
27fde6c7 | 50 | |
51 | if (!name) | |
52 | return; | |
53 | ||
54 | SetName(name); | |
55 | ||
a93ef37c | 56 | fBranchNames = "ESD:AliESDHeader.,AliESDRun.,SPDVertex.,Tracks"; |
cc2b5fb5 | 57 | } |
58 | ||
59 | //________________________________________________________________________ | |
cdd4e0e2 | 60 | AliEmcalEsdTrackFilterTask::~AliEmcalEsdTrackFilterTask() |
cc2b5fb5 | 61 | { |
62 | //Destructor | |
63 | ||
64 | delete fEsdTrackCuts; | |
65 | } | |
66 | ||
67 | //________________________________________________________________________ | |
cdd4e0e2 | 68 | void AliEmcalEsdTrackFilterTask::UserCreateOutputObjects() |
cc2b5fb5 | 69 | { |
a93ef37c | 70 | // Create histograms. |
cc2b5fb5 | 71 | |
72 | fTracks = new TClonesArray("AliESDtrack"); | |
73 | fTracks->SetName(fTracksName); | |
74 | ||
75 | if (!fEsdTrackCuts) { | |
dd5a823e | 76 | AliInfo("No track cuts given, creating default (standard only TPC) cuts"); |
cc2b5fb5 | 77 | fEsdTrackCuts = AliESDtrackCuts::GetStandardTPCOnlyTrackCuts(); |
78 | fEsdTrackCuts->SetPtRange(0.15,1e3); | |
79 | } | |
80 | } | |
81 | ||
82 | //________________________________________________________________________ | |
cdd4e0e2 | 83 | void AliEmcalEsdTrackFilterTask::UserExec(Option_t *) |
cc2b5fb5 | 84 | { |
85 | // Main loop, called for each event. | |
86 | ||
87 | fEsdEv = dynamic_cast<AliESDEvent*>(InputEvent()); | |
88 | if (!fEsdEv) { | |
89 | AliError("Task works only on ESD events, returning"); | |
90 | return; | |
91 | } | |
92 | ||
93 | AliAnalysisManager *am = AliAnalysisManager::GetAnalysisManager(); | |
94 | if (!am) { | |
95 | AliError("Manager zero, returning"); | |
96 | return; | |
97 | } | |
98 | ||
99 | // add tracks to event if not yet there | |
71c1dd76 | 100 | fTracks->Delete(); |
cc2b5fb5 | 101 | if (!(InputEvent()->FindListObject(fTracksName))) |
102 | InputEvent()->AddObject(fTracks); | |
103 | ||
dd5a823e | 104 | if (!fHybridTrackCuts) { // contrain TPC tracks to SPD vertex if fDoSpdVtxCon==kTRUE |
57184cc6 | 105 | am->LoadBranch("AliESDRun."); |
106 | am->LoadBranch("AliESDHeader."); | |
57184cc6 | 107 | am->LoadBranch("Tracks"); |
4d1e3842 | 108 | |
109 | if (fDoSpdVtxCon) { | |
110 | if (!TGeoGlobalMagField::Instance()->GetField()) { // construct field map | |
111 | fEsdEv->InitMagneticField(); | |
57184cc6 | 112 | } |
4d1e3842 | 113 | am->LoadBranch("SPDVertex."); |
114 | const AliESDVertex *vtxSPD = fEsdEv->GetPrimaryVertexSPD(); | |
115 | if (!vtxSPD) { | |
116 | AliError("No SPD vertex, returning"); | |
117 | return; | |
57184cc6 | 118 | } |
4d1e3842 | 119 | Int_t ntr = fEsdEv->GetNumberOfTracks(); |
120 | for (Int_t i=0, ntrnew=0; i<ntr; ++i) { | |
121 | AliESDtrack *etrack = fEsdEv->GetTrack(i); | |
122 | if (!etrack) | |
123 | continue; | |
124 | if (!fEsdTrackCuts->AcceptTrack(etrack)) | |
125 | continue; | |
126 | AliESDtrack *ntrack = AliESDtrackCuts::GetTPCOnlyTrack(fEsdEv,etrack->GetID()); | |
127 | if (!ntrack) | |
128 | continue; | |
129 | if (ntrack->Pt()<=0) { | |
130 | delete ntrack; | |
131 | continue; | |
132 | } | |
133 | Double_t bfield[3] = {0,0,0}; | |
134 | ntrack->GetBxByBz(bfield); | |
135 | AliExternalTrackParam exParam; | |
136 | Bool_t relate = ntrack->RelateToVertexBxByBz(vtxSPD,bfield,kVeryBig,&exParam); | |
137 | if (!relate) { | |
138 | delete ntrack; | |
139 | continue; | |
140 | } | |
141 | // set the constraint parameters to the track | |
142 | ntrack->Set(exParam.GetX(),exParam.GetAlpha(),exParam.GetParameter(),exParam.GetCovariance()); | |
143 | if (ntrack->Pt()<=0) { | |
144 | delete ntrack; | |
145 | continue; | |
146 | } | |
147 | new ((*fTracks)[ntrnew++]) AliESDtrack(*ntrack); | |
57184cc6 | 148 | delete ntrack; |
57184cc6 | 149 | } |
4d1e3842 | 150 | } else { /* no spd vtx constraint */ |
151 | Int_t ntr = fEsdEv->GetNumberOfTracks(); | |
152 | for (Int_t i=0, ntrnew=0; i<ntr; ++i) { | |
153 | AliESDtrack *etrack = fEsdEv->GetTrack(i); | |
154 | if (!etrack) | |
155 | continue; | |
156 | if (!fEsdTrackCuts->AcceptTrack(etrack)) | |
157 | continue; | |
158 | new ((*fTracks)[ntrnew++]) AliESDtrack(*etrack); | |
159 | } | |
cc2b5fb5 | 160 | } |
161 | ||
10d1f756 | 162 | } else { // use hybrid track cuts |
57184cc6 | 163 | |
164 | am->LoadBranch("Tracks"); | |
165 | Int_t ntr = fEsdEv->GetNumberOfTracks(); | |
166 | for (Int_t i=0, ntrnew=0; i<ntr; ++i) { | |
167 | AliESDtrack *etrack = fEsdEv->GetTrack(i); | |
35fb503f CL |
168 | if (!etrack) |
169 | continue; | |
170 | ||
57184cc6 | 171 | if (fEsdTrackCuts->AcceptTrack(etrack)) { |
af2f024d | 172 | |
b3bef4aa | 173 | AliESDtrack *newTrack = new ((*fTracks)[ntrnew]) AliESDtrack(*etrack); |
cdd4e0e2 CL |
174 | if (fDoPropagation) |
175 | AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(newTrack,fDist); | |
b3bef4aa | 176 | newTrack->SetBit(BIT(20),0); |
177 | newTrack->SetBit(BIT(21),0); | |
57184cc6 | 178 | ++ntrnew; |
179 | } else if (fHybridTrackCuts->AcceptTrack(etrack)) { | |
af2f024d | 180 | |
6231f841 | 181 | UInt_t status = etrack->GetStatus(); |
b3bef4aa | 182 | if (etrack->GetConstrainedParam() && (((status&AliESDtrack::kITSrefit)!=0) || fIncludeNoITS)) { |
b3bef4aa | 183 | AliESDtrack *newTrack = new ((*fTracks)[ntrnew]) AliESDtrack(*etrack); |
57184cc6 | 184 | const AliExternalTrackParam* constrainParam = etrack->GetConstrainedParam(); |
185 | newTrack->Set(constrainParam->GetX(), | |
186 | constrainParam->GetAlpha(), | |
187 | constrainParam->GetParameter(), | |
188 | constrainParam->GetCovariance()); | |
d08428f7 | 189 | if ((status&AliESDtrack::kITSrefit)==0) { |
b3bef4aa | 190 | newTrack->SetBit(BIT(20),0); //type 2 |
191 | newTrack->SetBit(BIT(21),1); | |
ee9f2228 | 192 | } else { |
b3bef4aa | 193 | newTrack->SetBit(BIT(20),1); //type 1 |
194 | newTrack->SetBit(BIT(21),0); | |
d08428f7 | 195 | } |
cdd4e0e2 CL |
196 | if (fDoPropagation) |
197 | AliEMCALRecoUtils::ExtrapolateTrackToEMCalSurface(newTrack,fDist); | |
198 | ++ntrnew; | |
af2f024d | 199 | } |
57184cc6 | 200 | } |
201 | } | |
cc2b5fb5 | 202 | } |
203 | } |