CERN Accelerating science

ATLAS Note
Report number	ATL-DAQ-PROC-2010-059
Title	ATLAS e/g/tau/jet/ETmiss High Level Trigger Algorithms Performance with first LHC collisions
Author(s)	Wielers, M (Rutherford)
Corporate Author(s)	The ATLAS collaboration
Publication	2010
Imprint	25 May 2010
Number of pages	7
In:	17th IEEE NPSS Real Time Conference, Lisbon, Portugal, 24 - 28 May 2010
Subject category	Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	Trigger, HLT, commissioning, e/g, tau, jet, etmiss
Abstract	This is the write-up of the talk at RT2010. An overview is given on the performance of the trigger for the selection of electrons, photons, taus, jets and missing transverse energy in the first data. Comparisons of the selection variables based on the calorimeter and tracking information calculated by the different trigger levels and the offline reconstruction will be shown. This has been an important step in the commissioning of these triggers to ensure their correct functioning and the results from the first data are very encouraging. Furthermore, examples of comparisons between data and simulations of some of the selection variables will be presented. At the end of the talk a brief outlook will be given on the steps to be taken to fully commission these triggers with 7 TeV collision data.
Copyright/License	Preprint: (License: CC-BY-4.0)

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