CERN Accelerating science

ATLAS Note
Report number	ATL-DAQ-PROC-2018-014
Title	The ATLAS Electron and Photon Trigger
Author(s)	Jones, Samuel David (University of Sussex) (+)
Corporate Author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Publication	2019
Imprint	12 Jul 2018
Number of pages	9
In:	J. Phys.: Conf. Ser. 1162 (2019) 012037
In:	18th International Conference on Calorimetry in Particle Physics, Eugene, Usa, 21 - 25 May 2018, pp.012037
DOI	10.1088/1742-6596/1162/1/012037
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	trigger ; egamma ; electron ; photon
Abstract	ATLAS electron and photon triggers covering transverse energies from 5 GeV to several TeV are essential to record signals for a wide variety of physics: from Standard Model processes to searches for new phenomena. To cope with ever-increasing luminosity and more challenging pile-up conditions at a centre-of-mass energy of 13 TeV, the trigger selections need to be optimised to control the rates and keep efficiencies high. The ATLAS electron and photon trigger performance in Run 2 will be presented, including both the role of the ATLAS calorimeter in electron and photon identification and details of new techniques developed to maintain high performance even in high pile-up conditions.
Copyright/License	Publication: (License: CC-BY-3.0)

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