Auteur(s): Aad G., Albrand S., Brown J., Collot J., Crépé-Renaudin S., Dechenaux B., Delsart P.A., Gabaldon C., Genest M.H., Hostachy J.Y., Ledroit-Guillon F., Lleres A., Lucotte A., Malek F., Monini C., Stark J., Trocmé B., Wu M., Rahal G., Abdel Khalek S., Bassalat A., Becot C., Binet S., Bourdarios C., Charfeddine D., De Vivie De Regie J.B., Duflot L., Escalier M., Fayard L., Ughetto M.
(Article) Publié:
European Physical Journal C, vol. 74 p.3130 (2014)
Texte intégral en Openaccess : 
PMID 25814875
Ref Arxiv: 1407.3935
DOI: 10.1140/epjc/s10052-014-3130-x
WoS: 000347171000001
Ref. & Cit.: NASA ADS
190 Citations
Résumé:
This paper presents the performance of the ATLAS muon reconstruction during the LHC run with $pp$ collisions at $\sqrt{s}=7-8$ 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 $J/\psi\to \mu\mu$, $Z\to \mu\mu$ and $\Upsilon\to\mu\mu$ 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 $|\eta|<2.7$ and $5 \lesssim p_{\mathrm{T}} \lesssim 100$ 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 $p_{\mathrm{T}} \simeq 10$ GeV, to $4\%$ at large rapidity and $p_{\mathrm{T}} \simeq 100$ 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.
Commentaires: See paper for full list of authors - 21 pages plus author list + cover pages (34 pages total), 21 figures, 2 tables, submitted to EPJC, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/PERF-2014-05/