Measurement of the top quark pair production cross-section with ATLAS in the single lepton channel.

G Aad, B. Abbott, J. Abdallah, A .A. Abdelalim, A. Abdesselam, O. Abdinov, B. Abi, M. Abolins, William Bell, The ATLAS collaboration

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)
1 Downloads (Pure)


A measurement of the production cross-section for top quark pairs (t tbar) in pp collisions at sqrt{s} = 7 TeV is presented using data recorded with the ATLAS detector at the Large Hadron Collider. Events are selected in the single lepton topology by requiring an electron or muon, large missing transverse momentum and at least three jets. With a data sample of 35/pb, two different multivariate methods, one of which uses b-quark jet identification while the other does not, use kinematic variables to obtain cross-section measurements of sigma (t tbar) = 187 +/- 11 (stat.) +18-17 (syst.) +/- 6 (lumi.) pb and sigma (t tbar) = 173 +/- 17 (stat.) +18-16 (syst.) +/- 6 (lumi.) pb} respectively. The two measurements are in agreement with each other and with QCD calculations. The first measurement has a better a priori sensitivity and constitutes the main result of this Letter.
Original languageEnglish
Pages (from-to)244-263
Number of pages20
JournalPhysics Letters B
Issue number3-4
Publication statusPublished - 15 May 2012


  • high-energy collider experiment
  • cross-section
  • Large Hadron Collider (LHC)

Cite this