Aad, GAbbott, BAbeling, K.Beddall, Andrew JohnÇetin, Serkant AliÖztürk, SertaçŞimşek, Sinem2025-04-182025-04-182024Aad, G., Abbott, B., Abeling, K., Abicht, N., Abidi, S., Aboulhorma, A., ... & Ballabene, E. (2024). Measurement of 𝑡-channel single-top-quark production in 𝑝𝑝 collisions at√ 𝑠= 5.02 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 854.03702693http://dx.doi.org/10.1016/j.physletb.2024.138726https://hdl.handle.net/20.500.12713/7173The observation of the electroweak production of single-top-quarks is made using 255 pb−1 of proton-proton collision data recorded at s=5.02 TeV with the ATLAS detector at the Large Hadron Collider. An event selection is used to identify single-top-quark candidates arising from t-channel production with the top quark decaying semi-leptonically. Events passing the selection are then used to measure the inclusive cross-section for the combined production of single-top-quarks and antiquarks, σ(tq+t¯q), and the ratio Rt between these two. They are measured to be σ(tq+t¯q)=27.1−4.1 +4.4(stat.)−3.7 +4.4(syst.) pb and Rt=2.73−0.82 +1.43(stat.)−0.29 +1.01(syst.). The individual single-top-quark (tq) and single-top-antiquark (t¯q) production cross-sections are measured to be σ(tq)=19.8−3.1 +3.9(stat.)−2.2 +2.9(syst.) pb and σ(t¯q)=7.3−2.1 +3.2(stat.)−1.5 +2.8(syst.) pb. All measurements are in good agreement with the Standard Model predictions. © 2024 The Author(s)eninfo:eu-repo/semantics/openAccessArticle8542-s2.0-8519417673310.1016/j.physletb.2024.138726Q1