Studies of the muon momentum calibration and performance of the ATLAS detector with $pp$ collisions at $\sqrt{s}$=13 TeV

ATLAS Collaboration

Preprint

PUBDB-2022-07952

Studies of the muon momentum calibration and performance of the ATLAS detector with $pp$ collisions at $\sqrt{s}$=13 TeV

ATLAS Collaboration (Collaboration author)DESY*

2022

[10.3204/PUBDB-2022-07952]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2022-07952

Report No.: CERN-EP-2022-274; arXiv:2212.07338

Abstract: This paper presents the muon momentum calibration and performance studies for the ATLAS detector based on the $pp$ collisions data sample produced at $\sqrt{s}$=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 $Z \rightarrow \mu^{+}\mu^{-}$ resonance. The muon momentum scale and resolution are measured using samples of $J/\psi \rightarrow \mu^{+}\mu^{-}$ and $Z \rightarrow \mu^{+}\mu^{-}$ 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 $\Upsilon \rightarrow \mu^{+}\mu^{-}$ events. At the $Z$ ($J/\psi$) 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$^{-1}$.

Keyword(s): muon, momentum ; p p, scattering ; momentum, calibration ; ATLAS, performance ; detector, geometry ; up, momentum ; TeV ; resolution ; charge dependence ; CERN LHC Coll ; GeV

Note: 35 pages in total, 15 figures, 3 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/MUON-2022-01/

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