Measurement of the top quark pair cross section with ATLAS in pp collisions at root s=7 TeV using final states with an electron or a muon and a hadronically decaying tau lepton


Aad G., Abbott B., Abdallah J., Khalek S. A. , Abdelalim A. A. , Abdinov O., ...More

PHYSICS LETTERS B, vol.717, pp.89-108, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 717
  • Publication Date: 2012
  • Doi Number: 10.1016/j.physletb.2012.09.032
  • Title of Journal : PHYSICS LETTERS B
  • Page Numbers: pp.89-108

Abstract

A measurement of the cross section of top quark pair production in proton-proton collisions recorded with the ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 7 TeV is reported. The data sample used corresponds to an integrated luminosity of 2.05 fb(-1). Events with an isolated electron or muon and a tau lePton decaying hadronically are used. In addition, a large missing transverse momentum and two or more energetic jets are required. At least one of the jets must be identified as originating from a b quark. The measured cross section, sigma(t (t) over bar) = 186 +/- 13 (stat.) +/- 20 (syst.) +/- 7 (lumi.) pb, is in good agreement with the Standard Model prediction. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.