The ATLAS High-Level Calorimeter Trigger in Run-2

ATLAS Collaboration

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Abstract

The ATLAS Experiment uses a two-level triggering system to identify and record proton-proton collision events containing a wide variety of physics signatures. It reduces the event rate from the bunch crossing rate of 40 MHz to an average recording rate of 1 kHz, whilst maintaining high efficiency for interesting collision events. It is composed of an initial hardware-based level-1 trigger followed by a software-based high-level trigger. A central component of the high-level trigger is the calorimeter trigger. This is responsible for processing data from the electromagnetic and hadronic calorimeters in order to identify electrons, photons, taus, jets and missing transverse energy. This paper presents the performance of the high-level calorimeter trigger in Run-2, noting the improvements that have been made in response to the challenges of operating at high luminosity.

Original languageEnglish
Article numberUNSP 012038
Book seriesJournal of Physics - Conference Series
Volume1162
Number of pages7
ISSN1742-6596
DOIs
Publication statusPublished - 30 Apr 2019

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