First measurement of the cross section for top-quark pair production in proton–proton collisions at √s = 7 TeV
Name
Khachatryan-2011-First measurement of.pdf
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Author(s)
Alver, B.
Bauer, Gerry P.
Bendavid, Joshua L.
Busza, Wit
Butz, Erik M.
Cali, Ivan Amos
Chan, M.
Dutta, V.
Everaerts, Pieter Bruno Bart
Gomez-Ceballos, Guillelmo
Date Issued
December 2010
Journal
Physics Letters B
Publisher
Elsevier
Citation
Khachatryan, V., A.M. Sirunyan, A. Tumasyan, W. Adam, T. Bergauer, M. Dragicevic, J. Erö, et al. “First Measurement of the Cross Section for Top-Quark Pair Production in Proton–proton Collisions at √s = 7 TeV.” Physics Letters B 695, no. 5 (January 2011): 424–443. © 2010 CERN
Version
Final published version
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[superscript −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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. School of Science
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2010.11.058
