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  • Measurement of ▫$tt^{-}$▫ production in association with additional b-jets in the e ▫$\mu$▫ final state in proton–proton collisions at ▫$\sqrt s$▫ = 13 TeV with the ATLAS detector
    Aad, Georges ...
    This paper presents measurements of top-antitop quark pair ( ) production in association with additional b-jets. The analysis utilises 140 fb−1 of proton–proton collision data collected with the ... ATLAS detector at the Large Hadron Collider at a centre-of-mass energy of 13 TeV. Fiducial cross-sections are extracted in a final state featuring one electron and one muon, with at least three or four b-jets. Results are presented at the particle level for both integrated cross-sections and normalised differential cross-sections, as functions of global event properties, jet kinematics, and b-jet pair properties. Observable quantities characterising b-jets originating from the top quark decay and additional b-jets are also measured at the particle level, after correcting for detector effects. The measured integrated fiducial cross-sections are consistent with predictions from various next-to-leading-order matrix element calculations matched to a parton shower within the uncertainties of the predictions. State-of-the-art theoretical predictions are compared with the differential measurements; none of them simultaneously describes all observables. Differences between any two predictions are smaller than the measurement uncertainties for most observables.
    Vir: The journal of high energy physics [Elektronski vir]. - ISSN 1029-8479 (Vol. 2025, article number 32, 2025, 1-76 str.)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2025
    Jezik - angleški
    COBISS.SI-ID - 231002627

    Povezava(-e):

    https://link.springer.com/article/10.1007/JHEP01(2025)068
    DOI

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