First measurement of the cross section for top-quark pair production in proton-proton collisions at √s=7 TeV
Journal
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Journal Volume
695
Journal Issue
5
Pages
424-443
Date Issued
2011
Abstract
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.
SDGs
Type
journal article