Электронный каталог

Статья

Aad, G.
Measurement of the tt^- Cross Section and Its Ratio to the Z Production Cross Section Using pp Collisions at *%s = 13.6 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, I.A.Budagov, 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, Y.Kulchitsky, 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, [ATLAS Collab.] // Physics Letters B [Electronic resource]. – 2024. – Vol. 848. – P. 138376. – URL: https://doi.org/10.1016/j.physletb.2023.138376. – Bibliogr.: 93.

The inclusive top-quark-pair production cross section *s&sub(^-n) and its ratio to the 𝑍-boson production cross section have been measured in proton–proton collisions at *%𝑠 = 13.6 TeV, using 29 fb*-*1 of data collected in 2022 with the ATLAS experiment at the Large Hadron Collider. Using events with an opposite-charge electron-muon pair and 𝑏-tagged jets, and assuming Standard Model decays, the top-quark-pair production cross section is measured to be *s&sub(^-n) = 850 ± 3(stat.) ± 18(syst.) ± 20(lumi.) pb. The ratio of the tt^- and the 𝑍-boson production cross sections is also measured, where the 𝑍-boson contribution is determined for inclusive e*+ e*- and *m*+*m*- events in a fiducial phase space. The relative uncertainty on the ratio is reduced compared to the tt^- cross section, thanks to the cancellation of several systematic uncertainties. The result for the ratio, R&sub(^-/Z) = 1.145 ± 0.003(stat.) ± 0.021(syst.) ± 0.002(lumi.) is consistent with the Standard Model prediction using the PDF4LHC21 PDF set.



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