Performance of CMS muon reconstruction in pp collision events at √s = 7 TeV

• Main Authors: Alver, Burak Han (Author), Bauer, Gerry P (Author), Bendavid, Joshua L. (Author), Busza, Wit (Author), Butz, Erik M. (Author), Cali, Ivan Amos (Author), Chan, M. (Author), Dutta, Valentina (Author), Gomez-Ceballos, Guillelmo (Author), Goncharov, Maxim (Author), Hahn, Kristian Allan (Author), Kim, Y. (Author), Klute, Markus (Author), Lee, Y.-J (Author), Li, W. (Author), Luckey Jr, P David (Author), Ma, T. (Author), Nahn, Steven C. (Author), Paus, Christoph M. E. (Author), Ralph, Duncan Kelley (Author), Roland, Christof E (Author), Roland, Gunther M (Author), Rudolph, Matthew Scott (Author), Stephans, George S. F. (Author), Stockli, Fabian (Author), Sumorok, Konstanty C (Author), Sung, K. (Author), Velicanu, Dragos Alexandru (Author), Wenger, Edward Allen (Author), Wolf, Roger (Author), Wyslouch, Boleslaw (Author), Xie, Si (Author), Yang, M. (Author), Yilmaz, Yetkin (Author), Yoon, A. S. (Author), Zanetti, Marco (Author)
• Other Authors: Massachusetts Institute of Technology. Department of Physics (Contributor), Massachusetts Institute of Technology. Laboratory for Nuclear Science (Contributor), Massachusetts Institute of Technology. Department of Nuclear Science and Engineering (Contributor)
• Format: Article
• Language: English
• Published: IOP Publishing, 2019-07-18T19:16:31Z.
• Subjects: Article
• Online Access: Get fulltext

The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40 pb⁻¹ of data collected in pp collisions at √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/c is above 95% over the whole region of pseudorapidity covered by the CMS muon system, < 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 GeVc is higher than 90% over the full η 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 100GeV/c and, using cosmic rays, it is shown to be better than 10% in the central region up to pT = 1 TeV/c. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.