{"title": "Measurement of single top-quark production in the s-channel in proton$-$proton collisions at $\\mathrm{\\sqrt{s}=13}$ TeV with the ATLAS detector", "issued": {"date-parts": [["2025", "11", "17"]]}, "abstract": "A measurement of single top-quark production in the s-channel is performed in proton--proton collisions at a centre-of-mass energy of $13$ TeV with the ATLAS detector at the CERN Large Hadron Collider. The dataset corresponds to an integrated luminosity of 139 fb$^{-1}$. The analysis is performed on events with an electron or muon, missing transverse momentum and exactly two $b$-tagged jets in the final state. A discriminant based on matrix element calculations is used to separate single top-quark s-channel events from the main background contributions, which are top-quark pair production and $W$-boson production in association with jets. The observed (expected) signal significance over the background-only hypothesis is 3.3 (3.9) standard deviations, and the measured cross-section is $\\sigma=8.2^{+3.5}_{-2.9}$ pb, consistent with the Standard Model prediction of $\\sigma^{\\mathrm{SM}}=10.32^{+0.40}_{-0.36}$ pb.", "author": [{"family": " Georges Aad"}, {"family": " Braden Keim Abbott", "uri": "http://orcid.org/"}, {"family": " D.C. Abbott", "uri": "http://orcid.org/"}, {"family": " Kira Abeling", "uri": "http://orcid.org/"}, {"family": " Haider Abidi", "uri": "http://orcid.org/"}, {"family": " Asmaa Aboulhorma", "uri": "http://orcid.org/"}, {"family": " Halina Abramowicz", "uri": "http://orcid.org/"}, {"family": " Henso Abreu", "uri": "http://orcid.org/"}, {"family": " Yiming Abulaiti", "uri": "http://orcid.org/"}, {"family": " A.C. Abusleme Hoffman", "uri": "http://orcid.org/"}], "type": "dataset", "id": "inspirehep_fb9b3ec7-675d-4873-bbd6-4420f0717cc2", "URL": "https://service.tib.eu/vdataset/inspirehep_fb9b3ec7-675d-4873-bbd6-4420f0717cc2"}