1 /*************************************************************************
2 * Copyright(c) 1998-2009, 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 *
9 * without fee, provided that the above copyright notice appears in all *
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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 ///////////////////////////////////////////////////////////////////////////
17 // Cut class providing cuts to all infomation //
18 // available for the AliVParticle interface //
21 // Julian Book <Julian.Book@cern.ch> //
28 ///////////////////////////////////////////////////////////////////////////
31 #include "AliDielectronV0Cuts.h"
32 #include "AliDielectronVarManager.h"
33 #include "AliDielectronTrackCuts.h"
36 ClassImp(AliDielectronV0Cuts)
39 AliDielectronV0Cuts::AliDielectronV0Cuts() :
40 AliDielectronVarCuts(),
42 fExcludeTracks(kTRUE),
55 //________________________________________________________________________
56 AliDielectronV0Cuts::AliDielectronV0Cuts(const char* name, const char* title) :
57 AliDielectronVarCuts(name,title),
59 fExcludeTracks(kTRUE),
72 //________________________________________________________________________
73 AliDielectronV0Cuts::~AliDielectronV0Cuts()
81 //________________________________________________________________________
82 void AliDielectronV0Cuts::InitEvent(AliVTrack *trk)
85 // Init the V0 candidates
88 // take current event from the track
89 // TODO: this should be simplyfied by AliVTrack::GetEvent() as soon as implemented
90 const AliVEvent *ev=0;
91 if(trk->IsA() == AliAODTrack::Class())
92 ev=static_cast<const AliVEvent*>((static_cast<const AliAODTrack*>(trk))->GetAODEvent());
93 else if(trk->IsA() == AliESDtrack::Class())
94 ev=static_cast<const AliVEvent*>((static_cast<const AliESDtrack*>(trk))->GetESDEvent());
101 if(!IsNewEvent(ev)) return;
102 // printf(" Build V0 candidates according to the applied cuts \n");
104 // TODO think about MCevent
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, 0.5, 1e30);
113 dauQAcuts1.AddCut(AliDielectronVarManager::kEta, -0.9, 0.9);
114 dauQAcuts1.AddCut(AliDielectronVarManager::kNclsTPC, 50.0, 160.0);
115 AliDielectronTrackCuts dauQAcuts2;
116 dauQAcuts2.SetRequireITSRefit(kTRUE);
117 dauQAcuts2.SetRequireTPCRefit(kTRUE);
120 AliDielectronPair candidate;
121 candidate.SetPdgCode(fMotherPdg);
124 if(ev->IsA() == AliESDEvent::Class()) {
125 const AliESDEvent *esdev = static_cast<const AliESDEvent*>(ev);
128 for (Int_t iv=0; iv<esdev->GetNumberOfV0s(); ++iv){
129 AliESDv0 *v = esdev->GetV0(iv);
132 // should we make use of AliESDv0Cuts::GetPdgCode() to preselect candiadtes, e.g.:
133 // if(fMotherPdg!=v->GetPdgCode()) continue;
135 AliESDtrack *trNeg=esdev->GetTrack(v->GetIndex(0));
136 AliESDtrack *trPos=esdev->GetTrack(v->GetIndex(1));
137 if(!trNeg || !trPos){
138 printf("Error: Couldn't get V0 daughter: %p - %p\n",trNeg,trPos);
142 // at least one of the daughter has to pass basic QA cuts
143 if(!(dauQAcuts1.IsSelected(trNeg) && dauQAcuts2.IsSelected(trNeg)) ||
144 !(dauQAcuts1.IsSelected(trPos) && dauQAcuts2.IsSelected(trPos)) ) continue;
146 if(fMotherPdg==22) candidate.SetGammaTracks(trNeg, 11, trPos, 11);
147 else candidate.SetTracks(trNeg, fNegPdg, trPos, fPosPdg);
148 // eventually take the external trackparam and build the KFparticles by hand (see AliESDv0::GetKFInfo)
149 // the folowing is not needed, because the daughters where used in the v0 vertex fit (I guess)
150 // AliKFVertex v0vtx = *v;
151 // candidate.SetProductionVertex(v0vtx);
153 if(AliDielectronVarCuts::IsSelected(&candidate)) {
155 //printf(" gamma found for vtx %p dau1id %d dau2id %d \n",v,trNeg->GetID(),trPos->GetID());
156 fV0TrackArr.SetBitNumber(trNeg->GetID());
157 fV0TrackArr.SetBitNumber(trPos->GetID());
162 else if(ev->IsA() == AliAODEvent::Class()) {
163 const AliAODEvent *aodEv = static_cast<const AliAODEvent*>(ev);
165 // loop over vertices
166 for (Int_t ivertex=0; ivertex<aodEv->GetNumberOfVertices(); ++ivertex){
167 AliAODVertex *v=aodEv->GetVertex(ivertex);
168 if(v->GetType()!=AliAODVertex::kV0) continue;
169 if(v->GetNDaughters()!=2) continue;
171 AliAODTrack *trNeg=dynamic_cast<AliAODTrack*>(v->GetDaughter(0));
172 AliAODTrack *trPos=dynamic_cast<AliAODTrack*>(v->GetDaughter(1));
173 if(!trNeg || !trPos){
174 printf("Error: Couldn't get V0 daughter: %p - %p\n",trNeg,trPos);
178 // at least one of the daughter has to pass basic QA cuts
179 if(!(dauQAcuts1.IsSelected(trNeg) && dauQAcuts2.IsSelected(trNeg)) ||
180 !(dauQAcuts1.IsSelected(trPos) && dauQAcuts2.IsSelected(trPos)) ) continue;
182 AliKFVertex v0vtx = *v;
183 if(fMotherPdg==22) candidate.SetGammaTracks(trNeg, 11, trPos, 11);
184 else candidate.SetTracks(trNeg, (trNeg->Charge()<0?fNegPdg:fPosPdg), trPos, (trPos->Charge()<0?fNegPdg:fPosPdg));
185 candidate.SetProductionVertex(v0vtx);
187 if(AliDielectronVarCuts::IsSelected(&candidate)) {
189 //printf(" gamma found for vtx %p dau1id %d dau2id %d \n",v,trNeg->GetID(),trPos->GetID());
190 fV0TrackArr.SetBitNumber(trNeg->GetID());
191 fV0TrackArr.SetBitNumber(trPos->GetID());
199 // printf(" Number of V0s candiates found %d \n",nV0s);
202 //________________________________________________________________________
203 Bool_t AliDielectronV0Cuts::IsSelected(TObject* track)
209 if(!track) return kFALSE;
211 AliVTrack *vtrack = static_cast<AliVTrack*>(track);
213 // printf(" track ID %d selected result %d \n",vtrack->GetID(),(fV0TrackArr.TestBitNumber(vtrack->GetID()))^fExcludeTracks);
214 return ( (fV0TrackArr.TestBitNumber(vtrack->GetID()))^fExcludeTracks );
217 //________________________________________________________________________
218 Bool_t AliDielectronV0Cuts::IsNewEvent(const AliVEvent *ev)
221 // check weather we process a new event
224 // printf(" current ev %d %d %d \n",fBunchCross, fOrbit, fPeriod);
225 // printf(" new event %p %d %d %d \n",ev, ev->GetBunchCrossNumber(), ev->GetOrbitNumber(), ev->GetPeriodNumber());
227 if( fBunchCross == ev->GetBunchCrossNumber() ) {
228 if( fOrbit == ev->GetOrbitNumber() ) {
229 if( fPeriod == ev->GetPeriodNumber() ) {
235 fBunchCross = ev->GetBunchCrossNumber();
236 fOrbit = ev->GetOrbitNumber();
237 fPeriod = ev->GetPeriodNumber();