Abstract
The performance of the muon reconstruction and identification in the CMS experiment at the LHC has been studied on data collected in pp collisions at s=7 and 8 TeV. Results from the measurements of the muon identification efficiencies, hadron misidentification probabilities as well as the muon momentum scale and resolution are presented.
Highlights
The Compact Muon Solenoid (CMS) [1] is a multipurpose detector at the LHC that covers a wide range of physics
Two different approaches are used to reconstruct muons: the global muon reconstruction, where a tracker-track is found for each standalone-muon track and a combined fit of the tracker and muon-detector hits is performed; and the tracker muon reconstruction, where the tracker-track is extrapolated and matched to segments reconstructed in the muon detector [2]
The efficiency of the muon identification algorithms is studied with the tag-and-probe method [4]: the tag is a very well identified muon which triggered the event, while the probe is a tracker track or a loosely-identified muon matched with the tag to lie either in the J/ψ or Z mass window
Summary
The Compact Muon Solenoid (CMS) [1] is a multipurpose detector at the LHC that covers a wide range of physics. The CMS detector identifies and measures muons produced in high energy proton-proton (pp) collisions on a large momentum range with high precision
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