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Performance of CMS muon reconstruction in pp collision events at root s=7Tev

Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Eroe, J.; Fabjan, C.; Friedl, M.; Fruehwirth, R.; Ghete, V. M.; Hammer, J.; Hoch, M.; Hoermann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Krammer, M.; Liko, D.; Liko, D.

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  <dc:creator>Chatrchyan, S.</dc:creator>
  <dc:creator>Khachatryan, V.</dc:creator>
  <dc:creator>Sirunyan, A. M.</dc:creator>
  <dc:creator>Tumasyan, A.</dc:creator>
  <dc:creator>Adam, W.</dc:creator>
  <dc:creator>Bergauer, T.</dc:creator>
  <dc:creator>Dragicevic, M.</dc:creator>
  <dc:creator>Eroe, J.</dc:creator>
  <dc:creator>Fabjan, C.</dc:creator>
  <dc:creator>Friedl, M.</dc:creator>
  <dc:creator>Fruehwirth, R.</dc:creator>
  <dc:creator>Ghete, V. M.</dc:creator>
  <dc:creator>Hammer, J.</dc:creator>
  <dc:creator>Hoch, M.</dc:creator>
  <dc:creator>Hoermann, N.</dc:creator>
  <dc:creator>Hrubec, J.</dc:creator>
  <dc:creator>Jeitler, M.</dc:creator>
  <dc:creator>Kiesenhofer, W.</dc:creator>
  <dc:creator>Krammer, M.</dc:creator>
  <dc:creator>Liko, D.</dc:creator>
  <dc:creator>Liko, D.</dc:creator>
  <dc:description>The performance of muon reconstruction, identification, and triggering in CMS has been studied using 40pb(-1) of data collected in pp collisions at root s = 7TeV 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 p(T) larger than a few GeV/c is above 95% over the whole region of pseudorapidity covered by the CMS muon system, vertical bar eta vertical bar &lt; 2.4, while the probability to misidentify a hadron as a muon is well below 1%. The efficiency to trigger on single muons with p(T) above a few GeV/c 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 p(T) below 100GeV/c and, using cosmic rays, it is shown to be better than 10% in the central region up to p(T) = 1TeV/c. Observed distributions of all quantities are well reproduced by the Monte Carlo simulation.</dc:description>
  <dc:source>JOURNAL OF INSTRUMENTATION 7</dc:source>
  <dc:title>Performance of CMS muon reconstruction in pp collision events at root s=7Tev</dc:title>
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