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4 * Author: The ALICE Off-line Project. *
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14 **************************************************************************/
16 ///////////////////////////////////////////////////////////////////////////
17 // Cut class providing cuts to V0 candidates //
18 // Selection or deselection of V0 candiates can be done. //
21 // Julian Book <Julian.Book@cern.ch> //
28 ///////////////////////////////////////////////////////////////////////////
31 #include "AliDielectronV0Cuts.h"
32 #include "AliDielectronVarManager.h"
33 #include "AliDielectronTrackCuts.h"
34 #include "AliDielectronPID.h"
37 ClassImp(AliDielectronV0Cuts)
40 AliDielectronV0Cuts::AliDielectronV0Cuts() :
41 AliDielectronVarCuts(),
43 fExcludeTracks(kTRUE),
57 //________________________________________________________________________
58 AliDielectronV0Cuts::AliDielectronV0Cuts(const char* name, const char* title) :
59 AliDielectronVarCuts(name,title),
61 fExcludeTracks(kTRUE),
75 //________________________________________________________________________
76 AliDielectronV0Cuts::~AliDielectronV0Cuts()
84 //________________________________________________________________________
85 void AliDielectronV0Cuts::InitEvent(AliVTrack *trk)
88 // Init the V0 candidates
91 // take current event from the track
92 // TODO: this should be simplyfied by AliVTrack::GetEvent() as soon as implemented
93 const AliVEvent *ev=0;
94 if(trk->IsA() == AliAODTrack::Class())
95 ev=static_cast<const AliVEvent*>((static_cast<const AliAODTrack*>(trk))->GetAODEvent());
96 else if(trk->IsA() == AliESDtrack::Class())
97 ev=static_cast<const AliVEvent*>((static_cast<const AliESDtrack*>(trk))->GetESDEvent());
104 if(!IsNewEvent(ev)) return;
105 // printf(" Build V0 candidates according to the applied cuts \n");
108 fV0TrackArr.ResetAllBits();
110 // basic quality cut, at least one of the V0 daughters has to fullfill
111 AliDielectronVarCuts dauQAcuts1;
112 dauQAcuts1.AddCut(AliDielectronVarManager::kPt, 0.05, 100.0);
113 dauQAcuts1.AddCut(AliDielectronVarManager::kEta, -0.9, 0.9);
114 dauQAcuts1.AddCut(AliDielectronVarManager::kNclsTPC, 50.0, 160.0);
115 dauQAcuts1.AddCut(AliDielectronVarManager::kTPCchi2Cl, 0.0, 4.0);
116 AliDielectronTrackCuts dauQAcuts2;
117 // dauQAcuts2.SetRequireITSRefit(kTRUE);
118 dauQAcuts2.SetRequireTPCRefit(kTRUE);
119 AliDielectronPID dauPIDcuts;
120 if(fPID>=0) dauPIDcuts.SetDefaults(fPID);
124 AliDielectronPair candidate;
125 candidate.SetPdgCode(fMotherPdg);
128 if(ev->IsA() == AliESDEvent::Class()) {
129 const AliESDEvent *esdev = static_cast<const AliESDEvent*>(ev);
131 //printf("there are %d V0s in the event \n",esdev->GetNumberOfV0s());
133 for (Int_t iv=0; iv<esdev->GetNumberOfV0s(); ++iv){
134 AliESDv0 *v = esdev->GetV0(iv);
137 // should we make use of AliESDv0Cuts::GetPdgCode() to preselect candiadtes, e.g.:
138 // if(fMotherPdg!=v->GetPdgCode()) continue;
140 AliESDtrack *trNeg=esdev->GetTrack(v->GetIndex(0));
141 AliESDtrack *trPos=esdev->GetTrack(v->GetIndex(1));
142 if(!trNeg || !trPos){
143 printf("Error: Couldn't get V0 daughter: %p - %p\n",trNeg,trPos);
149 if( !dauPIDcuts.IsSelected(trNeg) ) continue;
150 if( !dauPIDcuts.IsSelected(trPos) ) continue;
154 if( !dauQAcuts2.IsSelected(trNeg) ) continue;
155 if( !dauQAcuts2.IsSelected(trPos) ) continue;
156 if( !dauQAcuts1.IsSelected(trNeg) ) continue;
157 if( !dauQAcuts1.IsSelected(trPos) ) continue;
159 if(fMotherPdg==22) candidate.SetGammaTracks(trNeg, 11, trPos, 11);
160 else candidate.SetTracks(trNeg, fNegPdg, trPos, fPosPdg);
161 // eventually take the external trackparam and build the KFparticles by hand (see AliESDv0::GetKFInfo)
162 // the folowing is not needed, because the daughters where used in the v0 vertex fit (I guess)
163 // AliKFVertex v0vtx = *v;
164 // candidate.SetProductionVertex(v0vtx);
166 if(AliDielectronVarCuts::IsSelected(&candidate)) {
168 //printf(" gamma found for vtx %p dau1id %d dau2id %d \n",v,trNeg->GetID(),trPos->GetID());
169 fV0TrackArr.SetBitNumber(trNeg->GetID());
170 fV0TrackArr.SetBitNumber(trPos->GetID());
175 else if(ev->IsA() == AliAODEvent::Class()) {
176 const AliAODEvent *aodEv = static_cast<const AliAODEvent*>(ev);
178 // loop over vertices
179 for (Int_t ivertex=0; ivertex<aodEv->GetNumberOfVertices(); ++ivertex){
180 AliAODVertex *v=aodEv->GetVertex(ivertex);
181 if(v->GetType()!=AliAODVertex::kV0) continue;
182 if(v->GetNDaughters()!=2) continue;
184 AliAODTrack *trNeg=dynamic_cast<AliAODTrack*>(v->GetDaughter(0));
185 AliAODTrack *trPos=dynamic_cast<AliAODTrack*>(v->GetDaughter(1));
186 if(!trNeg || !trPos){
187 printf("Error: Couldn't get V0 daughter: %p - %p\n",trNeg,trPos);
194 if( !dauPIDcuts.IsSelected(trNeg) ) continue;
195 if( !dauPIDcuts.IsSelected(trPos) ) continue;
199 if( !dauQAcuts2.IsSelected(trNeg) ) continue;
200 if( !dauQAcuts2.IsSelected(trPos) ) continue;
201 if( !dauQAcuts1.IsSelected(trNeg) ) continue;
202 if( !dauQAcuts1.IsSelected(trPos) ) continue;
204 AliKFVertex v0vtx = *v;
205 if(fMotherPdg==22) candidate.SetGammaTracks(trNeg, 11, trPos, 11);
206 else candidate.SetTracks(trNeg, (trNeg->Charge()<0?fNegPdg:fPosPdg), trPos, (trPos->Charge()<0?fNegPdg:fPosPdg));
207 candidate.SetProductionVertex(v0vtx);
209 if(AliDielectronVarCuts::IsSelected(&candidate)) {
211 //printf(" gamma found for vtx %p dau1id %d dau2id %d \n",v,trNeg->GetID(),trPos->GetID());
212 fV0TrackArr.SetBitNumber(trNeg->GetID());
213 fV0TrackArr.SetBitNumber(trPos->GetID());
216 //printf("there are %d V0s in the event \n",nV0stored);
221 // printf(" Number of V0s candiates found %d/%d \n",nV0s,nV0stored);
224 //________________________________________________________________________
225 Bool_t AliDielectronV0Cuts::IsSelected(TObject* track)
231 if(!track) return kFALSE;
233 AliVTrack *vtrack = static_cast<AliVTrack*>(track);
235 //printf(" track ID %d selected result %d %d \n",vtrack->GetID(),(fV0TrackArr.TestBitNumber(vtrack->GetID())),fExcludeTracks);
236 return ( (fV0TrackArr.TestBitNumber(vtrack->GetID()))^fExcludeTracks );
239 //________________________________________________________________________
240 Bool_t AliDielectronV0Cuts::IsNewEvent(const AliVEvent *ev)
243 // check weather we process a new event
246 // printf(" current ev %d %d %d \n",fBunchCross, fOrbit, fPeriod);
247 // printf(" new event %p %d %d %d \n",ev, ev->GetBunchCrossNumber(), ev->GetOrbitNumber(), ev->GetPeriodNumber());
249 if( fBunchCross == ev->GetBunchCrossNumber() ) {
250 if( fOrbit == ev->GetOrbitNumber() ) {
251 if( fPeriod == ev->GetPeriodNumber() ) {
257 fBunchCross = ev->GetBunchCrossNumber();
258 fOrbit = ev->GetOrbitNumber();
259 fPeriod = ev->GetPeriodNumber();