Measurement of the t¯t production cross-section in the lepton+jets channel at √s = 13 TeV with the ATLAS experiment

ATLAS Publications, T.M. Carter, M. Faucci Giannelli, A. Hasib, M.P. Heath, S. Palazzo, A. Søgaard, A. Strubig, E.P. Takeva, A.J. Taylor, N. Themistokleous, E.M. Villhauer

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

The top anti-top quark production cross-section is measured in the lepton+jets channel using proton–proton collision data at a centre-of-mass energy of √s = 13 TeV collected with the ATLAS detector at the LHC. The dataset corresponds to an integrated luminosity of 139 fb−1 . Events with exactly one charged
lepton and four or more jets in the final state, with at least one jet containing b-hadrons, are used to determine the t¯t production cross-section through a profile-likelihood fit. The inclusive cross-section is measured to be σinc = 830 ± 0.4 (stat.) ± 36 (syst.) ± 14 (lumi.) pb with a relative uncertainty of 4.6%.
The result is consistent with theoretical calculations at next-to-next-to-leading order in perturbative QCD. The fiducial t¯t cross-section within the experimental acceptance is also measured.
Original languageEnglish
Article number135797
Pages (from-to)1-22
Number of pages22
JournalPhysics Letters B
Volume810
DOIs
Publication statusPublished - 10 Nov 2020

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