Электронный каталог

Статья

Aad, G.
Probing the CP Nature of the Top–Higgs Yukawa Coupling in tt^-H and tH Events with H *> bb^- Decays Using the ATLAS Detector at the LHC / 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, A.Gongadze, M.I.Gostkin, N.Huseynov, 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, S.Turchikhin, T.Turtuvshin, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.] // Physics Letters B [Electronic resource]. – 2024. – Vol. 849. – P. 138469. – URL: https://doi.org/10.1016/j.physletb.2024.138469. – Bibliogr.: 97.

The 𝐶𝑃 properties of the coupling between the Higgs boson and the top quark are investigated using 139 fb*−*1 of proton–proton collision data recorded by the ATLAS experiment at the LHC at a centre-of-mass energy of*%𝑠 = 13 TeV. The 𝐶𝑃 structure of the top quark–Higgs boson Yukawa coupling is probed in events with a Higgs boson decaying into a pair of 𝑏-quarks and produced in association with either a pair of top quarks, 𝑡̄𝑡^-𝐻, or a single top quark, 𝑡𝐻. Events containing one or two electrons or muons are used for the measurement. Multivariate techniques are used to select regions enriched in 𝑡̄𝑡*^𝐻 and 𝑡𝐻 events, where dedicated 𝐶𝑃 -sensitive observables are exploited. In an extension of the Standard Model (SM) with a 𝐶𝑃 -odd admixture in the top–Higgs Yukawa coupling, the mixing angle between 𝐶𝑃 -even and 𝐶𝑃 -odd couplings is measured to be *a = 11&sup( o+52o)&sub(−73 p), compatible with the SM prediction corresponding to *a =0



Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
Спец.(статьи,препринты) = С 346.6е2 - Промежуточные бозоны
ОИЯИ = ОИЯИ (JINR)2024