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Studies of the muon momentum calibration and performance of the ATLAS detector with pp collisions at √s=13 TeV
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Studies of the muon momentum calibration and performance of the ATLAS detector with pp collisions at √s=13 TeV

G. Aad, B. Abbott, K. Abeling, S.H. Abidi, A. Aboulhorma, H. Abramowicz, H. Abreu, Y. Abulaiti, A.C. Abusleme Hoffman, B.S. Acharya, …
European Physical Journal C, 卷.83(8), 686
08/2023
DOI: https://doi.org/10.1140/epjc/s10052-023-11584-x

摘要

Engineering (miscellaneous) Physics and Astronomy (miscellaneous)
This paper presents the muon momentum calibration and performance studies for the ATLAS detector based on the pp collisions data sample produced at s = 13 TeV at the LHC during Run 2 and corresponding to an integrated luminosity of 139 fb - 1 . An innovative approach is used to correct for potential charge-dependent momentum biases related to the knowledge of the detector geometry, using the Z→ μ + μ - resonance. The muon momentum scale and resolution are measured using samples of J/ ψ→ μ + μ - and Z→ μ + μ - events. A calibration procedure is defined and applied to simulated data to match the performance measured in real data. The calibration is validated using an independent sample of Υ → μ + μ - events. At the Z (J/ ψ) peak, the momentum scale is measured with an uncertainty at the 0.05% (0.1%) level, and the resolution is measured with an uncertainty at the 1.5% (2%) level. The charge-dependent bias is removed with a dedicated in situ correction for momenta up to 450 GeV with a precision better than 0.03 TeV - 1 .

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