Электронный каталог

Статья

Aad, G.
Search for Higgs Boson Exotic Decays into Lorentz-Boosted Light Bosons in the four-*t Final State at *%s = 13 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, A.R.Didenko, 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, A.Tropina, P.V.Tsiareshka, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.]. – Text : electronic // Physics Letters B. – 2025. – Vol. 870. – P. 139843. – URL: https://doi.org/10.1016/j.physletb.2025.139843. – Bibliogr.: 78.

A search for exotic decays of the Higgs boson into a pair of low-mass scalars that subsequently decay into *t-leptons, 𝐻 *> 𝑎𝑎 *> *t&sup(+)*t&sup(−)*t&sup(+)*t&sup(−), is presented. In models with Yukawa-like couplings, the decay to *t-leptons is favoured for light a-bosons, with mass in the range of 2𝑚&sub(*t)< 𝑚𝑎 < 2𝑚&sub(𝑏) . Results are presented in the range of 4 GeV < 𝑚𝑎 < 15 GeV using the 140 f b&sup(−1) of proton–proton collisions at *%𝑠 = 13 TeV recorded with the ATLAS detector during Run 2 of the Large Hadron Collider. This search focuses on the scenario where, for both di-*t pairs, one of the *t-leptons decays to hadrons and neutrinos, while the other decays to a muon and neutrinos. In this mass range, the 𝑎 *> *t&sup(+)*t&sup(−) is Lorentz-boosted and a dedicated muon removal technique is used to reconstruct the di-*t pairs. No significant excess above the Standard Model background prediction is observed. Upper limits on (*s(𝐻)∕*s&sub(SM)(𝐻)) × B(H *> aa *> 4*t) at 95 % confidence level are provided, ranging from 0.03 to 0.10 depending on the 𝑎-boson mass.



Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
ОИЯИ = ОИЯИ (JINR)2025