Performance of CMS Muon Reconstruction in $pp$ Collision Events at $\sqrt{s}=7$ TeV - INSPIRE

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Performance of CMS Muon Reconstruction in $pp$ Collision Events at $\sqrt{s}=7$ TeV

CMS

Collaboration

Jun, 2012

81 pages

Published in:

JINST 7 (2012) P10002

e-Print:

1206.4071 [physics.ins-det]

DOI:

10.1088/1748-0221/7/10/P10002

Report number:

CMS-MUO-10-004,
CERN-PH-EP-2012-173

Experiments:

CERN-LHC-CMS

View in:

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Abstract: (arXiv)

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.

Note:

Replaced with published version. Added journal reference and DOI

CMS
performance
numerical calculations: Monte Carlo
muon: particle identification
muon: transverse momentum
trigger: efficiency
momentum resolution
track data analysis
efficiency: angular dependence
background

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