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Статья

Aad, G.
Measurement of t-Channel Single-Top-Quark Production in pp Collisions at *%s = 5.02 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, G.A.Chelkov, A.Cheplakov, M.V.Chizhov, D.V.Dedovich, M.Demichev, M.I.Gostkin, S.N.Karpov, Z.M.Karpova, U.Kruchonak, V.Kukhtin, E.Ladygin, V.Lyubushkin, T.Lyubushkina, S.Malyukov, M.Mineev, E.Plotnikova, I.N.Potrap, N.A.Rusakovich, M.Shiyakova, A.Soloshenko, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, Y.Kulchitsky, [ATLAS Collab.] // Physics Letters B [Electronic resource]. – 2024. – Vol. 854. – P. 138726. – URL: https://doi.org/10.1016/j.physletb.2024.138726. – Bibliogr.: 62.

The 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, *s(𝑡𝑞 + t^-𝑞), and the ratio 𝑅&sub(𝑡) between these two. They are measured to be *s(𝑡𝑞 + 𝑞) = 27.1&sup(+4.4)&sub(−4.1) (stat.)&sup(+4.4)&sub(−3.7) (syst.) pb and 𝑅&sub(𝑡) = 2.73&sup(+1.43) &sub(−0.82) (stat.)&sup(+1.01)&sub(−0.29) (syst.). The individual single-top-quark (𝑡𝑞) and single-top-antiquark (̄t^-&sub(𝑞)) production cross-sections are measured to be *s(𝑡𝑞) = 19.8&sup(+3.9)&sub(−3.1) (stat.)&sup(+2.9)&sub(−2.2) (syst.) pb and *s(𝑡^-𝑞) = 7.3&sup(+3.2)&sub(−2.1) (stat.)&sup(+2.8)&sub(−1.5) (syst.) pb. All measurements are in good agreement with the Standard Model predictions.



Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
ОИЯИ = ОИЯИ (JINR)2024