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Performance of the ATLAS Level-1 topological trigger in Run 2

Published version
Peer-reviewed

Change log

Abstract

During LHC Run 2 (2015-2018) the ATLAS Level-1 topological trigger allowed efficient data-taking by the ATLAS experiment at luminosities up to 2.1x1034 cm−2s−1, which exceeds the design value by a factor of two. The system was installed in 2016 and operated in 2017 and 2018. It uses Field Programmable Gate Array processors to select interesting events by placing kinematic and angular requirements on electromagnetic clusters, jets, τ-leptons, muons and the total energy. It significantly improves the background event rejection and signal event acceptance, in particular for Higgs boson and B-physics measurements.

Description

Keywords

hep-ex, hep-ex

Journal Title

European Physical Journal C

Conference Name

Journal ISSN

1434-6044
1434-6052

Volume Title

82

Publisher

Springer Science and Business Media LLC