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Статья

Aad, G.
Search for Direct Production of Electroweakinos in Final States with One Lepton, Jets and Missing Transverse Momentum 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.A.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, I.Yeletskikh, A.Vasyukov, A.Zhemchugov, N.I.Zimine, Y.Kulchitsky, [ATLAS Collab.] // Journal of High Energy Physics [Electronic resource]. – 2023. – Vol. 2023, No. 12. – P. 167. – URL: https://doi.org/10.1007/JHEP12(2023)167. – Bibliogr.: 124.

Searches for electroweak production of wino-like chargino pairs, ˜χ+ 1 ˜χ− 1 , and of wino-like chargino and next-to-lightest neutralino, ˜χ± 1 ˜χ0 2, are presented. The models explored assume that the charginos decay into a W boson and the lightest neutralino, ˜χ± 1 → W ± ˜χ0 1. The next-to-lightest neutralinos are degenerate in mass with the chargino and decay to ˜χ0 1 and either a Z or a Higgs boson, ˜χ0 2 → Z ˜χ0 1 or h ˜χ0 1. The searches exploit the presence of a single isolated lepton and missing transverse momentum from the W boson decay products and the lightest neutralinos, and the presence of jets from hadronically decaying Z or W bosons or from the Higgs boson decaying into a pair of b-quarks. The searches use 139 fb−1 of √s = 13 TeV proton-proton collisions data collected by the ATLAS detector at the Large Hadron Collider between 2015 and 2018. No deviations from the Standard Model expectations are found, and 95% confidence level exclusion limits are set. Chargino masses ranging from 260 to 520 GeV are excluded for a massless ˜χ0 1 in chargino pair production models. Degenerate chargino and next-to-lightest neutralino masses ranging from 260 to 420 GeV are excluded for a massless ˜χ0 1 for ˜χ0 2 → Z ˜χ0 1. For decays through an on-shell Higgs boson and for mass-splitting between ˜χ± 1 / ˜χ0 2 and ˜χ0 1 as small as the Higgs boson mass, mass limits are improved by up to 40 GeV in the range of 200–260 GeV and 280–470 GeV compared to previous ATLAS constraints.



ОИЯИ = ОИЯИ (JINR)2023
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами