Performance of the ATLAS muon triggers 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 2931 more authors) (2020) Performance of the ATLAS muon triggers in Run 2 JOURNAL OF INSTRUMENTATION, 15 (9). P09015-. ISSN 1748-0221, 1748-0221

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Abstract

The performance of the ATLAS muon trigger system is evaluated with proton-proton (pp) and heavy-ion (HI) collision data collected in Run 2 during 2015-2018 at the Large Hadron Collider. It is primarily evaluated using events containing a pair of muons from the decay of Z bosons to cover the intermediate momentum range between 26 GeV and 100 GeV. Overall, the efficiency of the single-muon triggers is about 68% in the barrel region and 85% in the endcap region. The pT range for efficiency determination is extended by using muons from decays of Jψ mesons, W bosons, and top quarks. The performance in HI collision data is measured and shows good agreement with the results obtained in pp collisions. The muon trigger shows uniform and stable performance in good agreement with the prediction of a detailed simulation. Dedicated multi-muon triggers with kinematic selections provide the backbone to beauty, quarkonia, and low-mass physics studies. The design, evolution and performance of these triggers are discussed in detail.

Item Type: Article
Additional Information: 60 pages in total, author list starting page 44, 34 figures, 5 tables, submitted to JINST. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TRIG-2018-01
Uncontrolled Keywords: Data acquisition concepts, Data processing methods, Online farms and online filtering, Trigger concepts and systems (hardware and software)
Depositing User: Symplectic Admin
Date Deposited: 02 Nov 2020 11:27
Last Modified: 16 Jun 2026 16:33
DOI: 10.1088/1748-0221/15/09/P09015
Open Access URL: https://iopscience.iop.org/article/10.1088/1748-02...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3105907
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