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

Aad, G, Abbott, B, Abbott, DC, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2863 more authors) (2022) Performance of the ATLAS Level-1 topological trigger in Run 2. EUROPEAN PHYSICAL JOURNAL C, 82 (1). 1-.

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During LHC Run 2 (2015-2018) the ATLAS Level-1 topological trigger allowed efficient data-taking by the ATLAS experiment at luminosities up to 2.1x10$^{34}$ cm$^{-2}$s$^{-1}$, 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, $\tau$-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.

Item Type: Article
Additional Information: 36 pages in total, author list starting page 20, 10 figures, 3 tables, published in EPJC. All figures including auxiliary figures are available at
Uncontrolled Keywords: hep-ex, hep-ex
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 24 Jan 2022 09:35
Last Modified: 18 Jan 2023 21:15
DOI: 10.1140/epjc/s10052-021-09807-0
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