-- 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

Dumping the information of the HLT decision in 11000164725001.10.root, it was realized that most of the events have trigger decision=1, but the ESDoffline Emax>2 did not correspond to the same amount of events.

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 5 k 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.

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng Eta167920.png r1 manage 15.2 K 2011-11-23 - 13:39 Marcelfigueredo  
PNGpng Phi167920.png r1 manage 14.2 K 2011-11-23 - 13:39 Marcelfigueredo  
PNGpng clusterEnergy167920.png r1 manage 20.1 K 2011-11-23 - 13:38 Marcelfigueredo  
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Topic revision: r1 - 2011-11-23 - Marcelfigueredo
 
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