Measurement of the tt̄ production cross section in the dilepton channel in pp collisions at √s = 8 TeV

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Abstract

The top-antitop quark (tt̄) production cross section is measured in proton-proton collisions at √s = 8 TeV with the CMS experiment at the LHC, using a data sample corresponding to an integrated luminosity of 5.3 fb -1. The measurement is performed by analysing events with a pair of electrons or muons, or one electron and one muon, and at least two jets, one of which is identified as originating from hadronisation of a bottom quark. The measured cross section is 239 ± 2 (stat.) ± 11 (syst.) ± 6 (lum.) pb, for an assumed top-quark mass of 172.5 GeV, in agreement with the prediction of the standard model.

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Chatrchyan, S., Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., … Walsh, S. (2014). Measurement of the tt̄ production cross section in the dilepton channel in pp collisions at √s = 8 TeV. Journal of High Energy Physics, 2014(2). https://doi.org/10.1007/JHEP02(2014)024

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