Электронный каталог

Статья

Aad, G.
Observation of tt^- Production in the Lepton + Jets and Dilepton Channels in p + Pb Collisions at *%s&sub(NN)=8.16 TeV with the ATLAS Detector / G.Aad, F.Ahmadov, I.N.Aleksandrov, V.A.Bednyakov, I.R.Boyko, G.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.] // Journal of High Energy Physics [Electronic resource]. – 2024. – Vol. 2024, No. 11. – P. 101. – URL: https://doi.org/10.1007/JHEP11(2024)101. – Bibliogr.:78.

This paper reports the observation of top-quark pair production in proton-lead collisions in the ATLAS experiment at the Large Hadron Collider. The measurement is performed using 165 nb*−*1 of p+Pb data collected at √ s&sub(NN) = 8.16 TeV in 2016. Events are categorised in two analysis channels, consisting of either events with exactly one lepton (electron or muon) and at least four jets, or events with two opposite-charge leptons and at least two jets. In both channels at least one b-tagged jet is also required. Top-quark pair production is observed with a signifcance over fve standard deviations in each channel. The top-quark pair production cross-section is measured to be σ&sub(tt^-)= 58.1±2.0 (stat.)&sup(+4.8)&sub(−4.4) (syst.) nb, with a total uncertainty of 9%. In addition, the nuclear modifcation factor is measured to be RpA = 1.090 ± 0.039 (stat.)&sup(+0.094)&sub(−0.087) (syst.). The measurements are found to be in good agreement with theory predictions involving nuclear parton distribution functions.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
Спец.(статьи,препринты) = С 343 в - Взаимодействие протонов с ядрами (Z>2). Изобарно- аналоговые состояния