Measurement of the t(t)over-bar production cross-section in the lepton plus jets channel at √s=13 TeV with the ATLAS experiment



Aad, G, Abbott, B, Abbott, DC, Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2951 more authors) (2020) Measurement of the t(t)over-bar production cross-section in the lepton plus jets channel at √s=13 TeV with the ATLAS experiment PHYSICS LETTERS B, 810. 135797-. ISSN 0370-2693, 1873-2445

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Abstract

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 tt¯ production cross-section through a profile-likelihood fit. The inclusive cross-section is measured to be σ<inf>inc</inf>=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 tt¯ cross-section within the experimental acceptance is also measured.

Item Type: Article
Additional Information: 38 pages in total, author list starting page 22, 3 figures, 3 tables, submitted to PLB. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2020-02/
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 19 Oct 2020 08:49
Last Modified: 16 Jun 2026 06:01
DOI: 10.1016/j.physletb.2020.135797
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3104579
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