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

ATLAS Collaboration

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Abstract

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 .

Original languageEnglish
Article number686
Pages (from-to)1-37
Number of pages37
JournalEuropean Physical Journal C
Volume83
Issue number8
DOIs
Publication statusPublished - Aug 2023
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2023. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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