Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
(2012) Journal of Instrumentation — Vol. 7, p. P10002 (2012)
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- Abstract
- The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40 inverse picobarns of data collected in pp collisions at sqrt(s) = 7 TeV at the LHC in 2010. A few benchmark sets of selection criteria covering a wide range of physics analysis needs have been examined. For all considered selections, the efficiency to reconstruct and identify a muon with a transverse momentum pT larger than a few GeV is above 95% over the whole region of pseudorapidity covered by the CMS muon system, abs(eta) < 2.4, while the probability to misidentify a hadron as a muon is well below 1%. The efficiency to trigger on single muons with pT above a few GeV is higher than 90% over the full eta range, and typically substantially better. The overall momentum scale is measured to a precision of 0.2% with muons from Z decays. The transverse momentum resolution varies from 1% to 6% depending on pseudorapidity for muons with pT below 100 GeV and, using cosmic rays, it is shown to be better than 10% in the central region up to pT = 1 TeV. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.
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Citations
CMS Collaboration, Chatrchyan, S., Basegmez, S., Bruno, G., Ceard, L., de Favereau de Jeneret, J., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Grégoire, G., Hollar, J., Lemaitre, V., Liao, J., Militaru, O., Nuttens, C., Pagano, D., Pin, A., et al. (2012). Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV. Journal of Instrumentation, 7, P10002. https://doi.org/10.1088/1748-0221/7/10/P10002 (Original work published 2012)