The performance of the CMS muon detector in proton-proton collisions at sqrt(s) = 7 TeV at the LHC - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Journal of Instrumentation Year : 2013

The performance of the CMS muon detector in proton-proton collisions at sqrt(s) = 7 TeV at the LHC

S. Chatrchyan
  • Function : Author
Pierre Busson
R. Granier de Cassagnac
C. Mironov
P. Paganini
J.-L. Agram
C. Collard
E. Conte
P. van Hove
D. Contardo
M. Gouzevitch
M. Lethuillier
V. Sordini
P. Verdier

Abstract

The performance of all subsystems of the CMS muon detector has been studied by using a sample of proton--proton collision data at sqrt(s) = 7 TeV collected at the LHC in 2010 that corresponds to an integrated luminosity of approximately 40 inverse picobarns. The measured distributions of the major operational parameters of the drift tube (DT), cathode strip chamber (CSC), and resistive plate chamber (RPC) systems met the design specifications. The spatial resolution per chamber was 80-120 micrometers in the DTs, 40-150 micrometers in the CSCs, and 0.8-1.2 centimeters in the RPCs. The time resolution achievable was 3 ns or better per chamber for all 3 systems. The efficiency for reconstructing hits and track segments originating from muons traversing the muon chambers was in the range 95-98%. The CSC and DT systems provided muon track segments for the CMS trigger with over 96% efficiency, and identified the correct triggering bunch crossing in over 99.5% of such events. The measured performance is well reproduced by Monte Carlo simulation of the muon system down to the level of individual channel response. The results confirm the high efficiency of the muon system, the robustness of the design against hardware failures, and its effectiveness in the discrimination of backgrounds.

Dates and versions

in2p3-00839855 , version 1 (01-07-2013)

Identifiers

Cite

S. Chatrchyan, M. Besançon, S. Choudhury, M. Dejardin, D. Denegri, et al.. The performance of the CMS muon detector in proton-proton collisions at sqrt(s) = 7 TeV at the LHC. Journal of Instrumentation, 2013, 8, pp.P11002. ⟨10.1088/1748-0221/8/11/P11002⟩. ⟨in2p3-00839855⟩
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