Электронный каталог

Статья

Aad, G.
Measurement of the Associated Production of a Top-Antitop-Quark Pair and a Higgs Boson Decaying into a bb^- Pair in pp Collisions at *%s=13 TeV Using the ATLAS Detector at the LHC / 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, A.R.Didenko, 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.Tropina, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, Y.Kulchitsky, [ATLAS Collab.] // The European Physical Journal C [Electronic resource]. – 2025. – Vol. 85, No. 2. – P. 210. – URL: https://doi.org/10.1140/epjc/s10052-025-13740-x. – Bibliogr.: 111.

This paper reports the measurement of Higgs boson production in association with a tt^- pair in the H → bb^- decay channel. The analysis uses 140 fb*−*1 of 13 TeV proton– proton collision data collected with the ATLAS detector at the Large Hadron Collider. The final states with one or two elec- trons or muons are employed. An excess of events over the expected background is found with an observed (expected) significance of 4.6 (5.4) standard deviations. The tt^- H cross- section is σ&sub(tt^- H)= 411&sup(+101)&sub(−92) fb = 411±54(stat.)&sup(+85)&sub(−75)(syst.) fb for a Higgs boson mass of 125.09 GeV, consistent with the prediction of the Standard Model of 507&sup(+35)&sub(−50) fb. The cross- section is also measured differentially in bins of the Higgs boson transverse momentum within the simplified template cross-section framework.



ОИЯИ = ОИЯИ (JINR)2025