Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton-proton collision data
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Date
2014
Authors
Aad, G.
ATLAS Collaboration,
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Journal article
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European Physical Journal C, 2014; 74(11):3130-1-3130-34
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Paul D Jackson … Lawrence Lee-Jr … Andreas Petridis … Nitesh Soni … Martin White … Xiaoyu Chen … Yan Chen … Yanzhi Chen … Sunil Gupta … Richard Jones … Catherine Leggett … Jian Liu … Kristian Peters … Tao Wang … Xian Wang … Xiaoyi Wang … Zhengliang Zhao … et al. (ATLAS Collaboration)
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Abstract
This paper presents the performance of the ATLAS muon reconstruction during the LHC run with pp collisions at s√=7–8 TeV in 2011–2012, focusing mainly on data collected in 2012. Measurements of the reconstruction efficiency and of the momentum scale and resolution, based on large reference samples of J/ψ→μμ, Z→μμ and Υ→μμ decays, are presented and compared to Monte Carlo simulations. Corrections to the simulation, to be used in physics analysis, are provided. Over most of the covered phase space (muon |η|<2.7 and 5≲pT≲100 GeV) the efficiency is above 99% and is measured with per-mille precision. The momentum resolution ranges from 1.7% at central rapidity and for transverse momentum pT≃10 GeV, to 4% at large rapidity and pT≃100 GeV. The momentum scale is known with an uncertainty of 0.05% to 0.2% depending on rapidity. A method for the recovery of final state radiation from the muons is also presented.
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© CERN for the benefit of the ATLAS collaboration 2014. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Funded by SCOAP3 / License Version CC BY 4.0