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

Aad, G.; Abbott, B.; Abbott, D.C.; Abud, A.A.; Abeling, K.; Abhayasinghe, D.K.; Abidi, S.H.; AbouZeid, O.S.; Abraham, N.L.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Abusleme Hoffman, A.C.; Acharya, B.S.; Achkar, B.; Adam, L.; Bourdarios, C.A.; Adamczyk, L.; Adamek, L.; Adelman, J.; et al.

Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/134093

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Type:	Journal article
Title:	Performance of the ATLAS Level-1 topological trigger in Run 2
Author:	Aad, G. Abbott, B. Abbott, D.C. Abud, A.A. Abeling, K. Abhayasinghe, D.K. Abidi, S.H. AbouZeid, O.S. Abraham, N.L. Abramowicz, H. Abreu, H. Abulaiti, Y. Abusleme Hoffman, A.C. Acharya, B.S. Achkar, B. Adam, L. Bourdarios, C.A. Adamczyk, L. Adamek, L. Adelman, J. et al.
Citation:	European Physical Journal C: Particles and Fields, 2022; 82(1):7-1-7-26
Publisher:	Springer Nature
Issue Date:	2022
ISSN:	1124-1861 1434-6052
Statement of Responsibility:	G. Aad … D. Duvnjak … P. Jackson … A.X.Y. Kong … J.L. Oliver … H. Potti … T.A. Ruggeri … A.S. Sharma … M.J. White … et al. [The ATLAS Collaboration]
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 2.1×10³⁴ 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 missing transverse energy. It allowed to significantly improve the background event rejection and signal event acceptance, in particular for Higgs and B-physics processes.
Rights:	© CERN for the benefit of the ATLAS collaboration 2021. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. Funded by SCOAP³.
DOI:	10.1140/epjc/s10052-021-09807-0
Grant ID:	ARC
Published version:	http://dx.doi.org/10.1140/epjc/s10052-021-09807-0
Appears in Collections:	Physics publications

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