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Measurement of the t(t)over-bar production cross section in pp collisions at root s=7 TeV using the kinematic properties of events with leptons and jets

  • 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.
  • Haensel, S.
  • Hoch, M.
  • Hoermann, N.
  • Hrubec, J.
  • Jeitler, M.
  • Kiesenhofer, W.
  • Krammer, M.
  • And 2171 more
Publication Date
Sep 01, 2011
Repositório Institucional UNESP
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A measurement of the t (t) over bar production cross section in proton-proton collisions at a centre-of-mass energy of 7 TeV has been performed at the LHC with the CMS detector. The analysis uses a data sample corresponding to an integrated luminosity of 36 pb(-1) and is based on the reconstruction of the final state with one isolated, high transverse-momentum electron or muon and three or more hadronic jets. The kinematic properties of the events are used to separate the t (t) over bar signal from W+jets and QCD multijet background events. The measured cross section is 173(-32)(+39) (stat. + syst.) pb, consistent with standard model expectations.

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