-- MarcelFigueredo - 23-Nov-2011

HLT mode C - LHC11h

We have been studying some runs from LHC11h which contains the the EMCAL-HLT inside the reconstruction chain. The purposes of these studies is to check how the HLT reconstruction looks like and also do some track-cluster matching QA. For the latest runs, there are also the HLT trigger decision for Gamma and electron trigger, which need to be validated.

November 23, 2011

Run 167920

1 - Cluster distributions: Energy, Eta and Phi

For this purpose, some jobs were submitted to the GRID, using AliESDInputHandler:GetHLTEvent(), so that one could look into both HLT and ESD event (examples are provided attached to this page).

Around 5k Events were analyzed after L1(Gamma trigger selected -kEMCEGA).

Figure 1.1 - Cluster Energy HLT and ESD
clusterEnergy167920.png;rev=1

Figure 1.2 - Cluster Eta for ESD and HLT reconstruction
Eta167920.png;rev=1

Figure 1.3 - Cluster Phi for ESD and HLT reconstruction
Phi167920.png;rev=1

2 - Preliminary Conclusions

The behavior for the angular distribution of the HLT-clusters(EMCAL) reconstructed seems to be ok(no clear difference). The behavior of the cluster energy seems not not be ok. We do not clearly see the bump do trigger region, as one can clearly see for the ESD case. We need to investigate what is happening with the reconstruction.

Run 167920 (Track Matching)

3 - Track Matching: E/P, dEta, dPhi.

For this purpose, some jobs were submitted to the GRID, using AliESDInputHandler:GetHLTEvent(), so that one could look into both HLT and ESD event (examples are provided attached to this page).

Around 500 Events were analyzed after L1(Gamma trigger selected -kEMCEGA).

Figure 3.1 - Cluster Energy HLT and ESD
EoverPTM.png;rev=1

Figure 3.2 - dEta Track-Cluster Matching ESD and HLT reconstruction
EtaTM.png;rev=1

Figure 3.3 - dPhi Track-Cluster Matching ESD and HLT reconstruction
PhiTM.png;rev=1

4 - Preliminary Conclusions

The behavior of the track matching needs to be carefully studied with more statistics. Some efficiencies studies to be done. One important fact is that we have a factor of 50 less entries than in the ESDoffline. Part of this comes from the fact that we have a cut in ClusterE=1 GeV and pt=1 GeV in the global track matched due to some cpu performance improvement we introduced some time ago. We really need to check if this is the only reason for that.
Topic attachments
I Attachment History Action Size Date Who CommentSorted ascending
Unknown file formatcxx AliAnalysisTaskESD_HLT.cxx r1 manage 5.7 K 2011-11-23 - 15:36 Marcelfigueredo  
Header fileh AliAnalysisTaskESD_HLT.h r1 manage 1.3 K 2011-11-23 - 15:36 Marcelfigueredo  
C source code filec CreateAlienHandler.C r1 manage 5.6 K 2011-11-23 - 15:36 Marcelfigueredo  
PNGpng EoverPTM.png r1 manage 16.0 K 2011-11-23 - 14:46 Marcelfigueredo  
PNGpng Eta167920.png r1 manage 15.2 K 2011-11-23 - 13:39 Marcelfigueredo  
PNGpng EtaTM.png r1 manage 18.5 K 2011-11-23 - 14:46 Marcelfigueredo  
PNGpng Phi167920.png r1 manage 14.2 K 2011-11-23 - 13:39 Marcelfigueredo  
PNGpng PhiTM.png r1 manage 19.6 K 2011-11-23 - 14:46 Marcelfigueredo  
PNGpng clusterEnergy167920.png r1 manage 20.1 K 2011-11-23 - 13:38 Marcelfigueredo  
C source code filec runGrid.C r1 manage 2.6 K 2011-11-23 - 15:36 Marcelfigueredo  
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Topic revision: r2 - 2011-11-23 - Marcelfigueredo
 
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