First Measurement of the Cross Section for Top-Quark Pair Production in Proton-Proton Collisions at sqrt(s)=7 TeV

Volker Adler, Stephanie Beauceron, Stijn Blyweert, Jorgen D'Hondt, Olivier Devroede, Alexis Kalogeropoulos, Joris Maes, Michael Maes, Stefaan Tavernier, Walter Van Doninck, Petra Van Mulders, Gerrit Van Onsem, Ilaria Villella

Research output: Contribution to journalArticlepeer-review

Abstract

The first measurement of the cross section for top-quark pair production in pp collisions at the LHC at center-of-mass energy sqrt(s)= 7 TeV has been performed using 3.1 {\pm} 0.3 inverse pb of data 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 {\pm} 1.0 events expected from background. The measured cross section is 194 {\pm} 72 (stat.) {\pm} 24 (syst.) {\pm} 21 (lumi.) pb, consistent with next-to-leading order predictions.
Original languageEnglish
Pages (from-to)424-443
Number of pages19
JournalPhys.Lett. B
Volume695
Publication statusPublished - 2011

Keywords

  • top : pair production : total cross section
  • CERN LHC coll
  • CMS
  • Physics
  • LHC
  • Top quark
  • Cross section

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