Электронный каталог

Статья

Aad, G.
Search for Same-Charge Top-Quark Pair Production in pp Collisions 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, M.Shiyakova, A.Soloshenko, A.Tropina, P.V.Tsiareshka, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.] // Journal of High Energy Physics [Electronic resource]. – 2025. – Vol. 2025, No. 2. – P. 084. – URL: https://doi.org/10.1007/JHEP02(2025)084. – Bibliogr.: 98.

A search for the production of top-quark pairs with the same electric charge (tt or t*-t^-) is presented. The analysis uses proton-proton collision data at √s = 13 TeV, recorded by the ATLAS detector at the Large Hadron Collider, corresponding to an integrated luminosity of 140 fb*−*1. Events with two same-charge leptons and at least two b-tagged jets are selected. Neural networks are employed to define two selections sensitive to additional couplings beyond the Standard Model that would enhance the production rate of same-sign top-quark pairs. No significant signal is observed, leading to an upper limit on the total production cross-section of same-sign top-quark pairs of 1.6 fb at 95% confidence level. Corresponding limits on the three Wilson coefficients associated with the O&sup((1))&sub(tu) , O&sup((1))&sub(Qu), and O&sup((8))&sub(Qu) operators in the Standard Model Effective Field Theory framework are derived.



ОИЯИ = ОИЯИ (JINR)2025