First measurement of the cross section for top-quark pair production in proton-proton collisions at root s=7 TeV

Journal article

The first measurement of the cross section for top-quark pair production in pp collisions at the Large Hadron Collider at center-of-mass energy s=7 TeV has been performed using a data sample corresponding to an integrated luminosity of 3.1±0.3 pb-1 recorded by the CMS detector. This result utilizes the final state with two isolated, highly energetic charged leptons, large missing transverse energy, and two or more jets. Backgrounds from Drell-Yan and non-W/Z boson production are estimated from data. Eleven events are observed in the data with 2.1±1.0 events expected from background. The measured cross section is 194±72(stat.)±24(syst.)±21(lumi.) pb, consistent with next-to-leading order predictions. © 2010 CERN.

Authors: Khachatryan, V; Sirunyan, A; Tumasyan, A; Adam, W; Bergauer, T

• Publication status: Published
• Journal: Physics Letters B
• Volume: 695
• Issue: 5
• Pages: 424-443
• Publication date: 2011-01-17
• DOI: 10.1016/j.physletb.2010.11.058
• ISSN: 0370-2693
• Language: English
• Keywords: LHC; CMS; Cross section; Top quark; Physics