Scientific article
OA Policy
English

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

ContributorsATLAS Collaboration
Publication date2023
First online date2023-08-01
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 ${\textrm{fb}}^{-1}$. 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 ${\textrm{TeV}}^{-1}$.

Keywords
  • P p: colliding beams
  • Muon: momentum
  • P p: scattering
  • Z0: leptonic decay
  • J/psi(3100): leptonic decay
  • Upsilon mesons: leptonic decay
  • Muon: pair production
  • Momentum: calibration
  • ATLAS: performance
  • Detector: geometry
  • Momentum resolution
  • Charge dependence
  • CERN LHC Coll
  • Data analysis method
  • Numerical calculations: Monte Carlo
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Studies of the muon momentum calibration and performance of the ATLAS detector with pp collisions at √s=13 TeV. In: European physical journal. C, Particles and fields, 2023, vol. 83, n° 8, p. 686. doi: 10.1140/epjc/s10052-023-11584-x
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Article (Published version)
Identifiers
Journal ISSN1434-6044
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80downloads

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