Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV

Understand

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.