Difference: AnalysisOn2011PbPbData(EMC-triggerStudies) (1 vs. 2)

Revision 22012-04-13 - Marcelfigueredo

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META TOPICPARENT name="MarcelFigueredo"
-- MarcelFigueredo - 12-Apr-2012
Line: 78 to 78
 
Figure 6(c) - Inv.Mass pair{+-} and {++and--}
hMass_6_7_20_1Same.gif;rev=1
Added:
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Preliminary conclusion

Imposing cut on ptpair and Ecluster,(an also opening angle), there is some slight evidence of peak. More statistics and better methods for background subtraction might improve the analysiis
 
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Revision 12012-04-13 - Marcelfigueredo

Line: 1 to 1
Added:
>
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META TOPICPARENT name="MarcelFigueredo"
-- MarcelFigueredo - 12-Apr-2012

General information

~ 1.2 M events (EMC-L1-Gamma trigger) ~ 1M after event selection = vertex<10cm. Both values above need to be carefully checked.

General cuts

if(TMath::Abs(track->Eta())>0.8)return kFALSE;  // To make things safe
if(track->Phi()<1.0||track->Phi()>4.)return kFALSE; // To make things safe
Int_t ClsId = track->GetEMCALcluster();
if(ClsId == -1) return kFALSE;
AliESDCaloCluster *cluster = esdE->GetCaloCluster(ClsId);
if(!cluster->IsEMCAL())return kFALSE;
Double_t dEta=cluster->GetTrackDz();
Double_t dPhi=cluster->GetTrackDx();
if(TMath::Abs(dEta)>0.02)return kFALSE; // To make things safe
if(TMath::Abs(dPhi)>0.05)return kFALSE; // To make things safe

AddCut(AliDielectronVarManager::kTPCsignal,68.,120.); // from prior analysis
esdTrackCuts->SetMaxDCAToVertexZ(3.0);
esdTrackCuts->SetMaxDCAToVertexXY(1.0);
esdTrackCuts->SetEtaRange( -0.9 , 0.9 );
esdTrackCuts->SetAcceptKinkDaughters(kFALSE);
esdTrackCuts->SetRequireITSRefit(kTRUE);
esdTrackCuts->SetRequireTPCRefit(kTRUE);
esdTrackCuts->SetPtRange(1.,1e30);
esdTrackCuts->SetMinNClustersTPC(70);
esdTrackCuts->SetMaxChi2PerClusterTPC(4);
  // default SPD any
esdTrackCuts->SetClusterRequirementITS(AliESDtrackCuts::kSPD,AliESDtrackCuts::kAny);

Results

Centrality distribution

Invariant Mass

1 - Centrality 0-80, Ecluster >6 GeV, OpenAngle<6.,ptpair>7GeV

Figure 1(a) - Inv.Mass pair{+-} Figure 1(b) - Inv.Mass pair{++and--}
hMass_6_7_80_6.gif;rev=1 hMassB_6_7_80_6.gif;rev=1
Figure 1(c) - Inv.Mass pair{+-} and {++and--}
hMass_6_7_80_6Same.gif;rev=1

2 - Centrality 0-80, Ecluster >6 GeV, OpenAngle<2.,ptpair>7GeV

Figure 2(a) - Inv.Mass pair{+-} Figure 2(b) - Inv.Mass pair{++and--}
hMass_6_7_80_2.gif;rev=1 hMassB_6_7_80_2.gif;rev=1
Figure 2(c) - Inv.Mass pair{+-} and {++and--}
hMass_6_7_80_2Same.gif;rev=1

3 - Centrality 0-80, Ecluster >6 GeV, OpenAngle<1.,ptpair>7GeV

Figure 3(a) - Inv.Mass pair{+-} Figure 3(b) - Inv.Mass pair{++and--}
hMass_6_7_80_1.gif;rev=1 hMassB_6_7_80_1.gif;rev=1
Figure 3(c) - Inv.Mass pair{+-} and {++and--}
hMass_6_7_80_1Same.gif;rev=1

4 - Centrality 0-20, Ecluster >6 GeV, OpenAngle<6.,ptpair>7GeV

Figure 4(a) - Inv.Mass pair{+-} Figure 4(b) - Inv.Mass pair{++and--}
hMass_6_7_20_6.gif;rev=1 hMassB_6_7_20_6.gif;rev=1
Figure 4(c) - Inv.Mass pair{+-} and {++and--}
hMass_6_7_20_6Same.gif;rev=1

5 - Centrality 0-20, Ecluster >6 GeV, OpenAngle<2.,ptpair>7GeV

Figure 5(a) - Inv.Mass pair{+-} Figure 5(b) - Inv.Mass pair{++and--}
hMass_6_7_20_2.gif;rev=1 hMassB_6_7_20_2.gif;rev=1
Figure 5(c) - Inv.Mass pair{+-} and {++and--}
hMass_6_7_20_2Same.gif;rev=1

6 - Centrality 0-20, Ecluster >6 GeV, OpenAngle<1.,ptpair>7GeV

Figure 6(a) - Inv.Mass pair{+-} Figure 6(b) - Inv.Mass pair{++and--}
hMass_6_7_20_1.gif;rev=1 hMassB_6_7_20_1.gif;rev=1
Figure 6(c) - Inv.Mass pair{+-} and {++and--}
hMass_6_7_20_1Same.gif;rev=1

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