Электронный каталог

Статья

Aad, G.
Search for Heavy Majorana Neutrinos in e&sup(*()e&sup(*() and e&sup(*()*m&sup(*() Final States Via WW Scattering 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, 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, T.Turtuvshin, A.Vasyukov, I.Yeletskikh, A.Zhemchugov, N.I.Zimine, [ATLAS Collab.] // Physics Letters B [Electronic resource]. – 2024. – Vol. 856. – P. 138865. – URL: https://doi.org/10.1016/j.physletb.2024.138865. – Bibliogr.: 90.

A search for heavy Majorana neutrinos in scattering of same-sign 𝑊 boson pairs in proton–proton collisions at *%𝑠 = 13 TeV at the LHC is reported. The dataset used corresponds to an integrated luminosity of 140 fb&sup(−1), collected with the ATLAS detector during 2015–2018. The search is performed in final states including a same-sign 𝑒𝑒 or 𝑒*m pair and at least two jets with large invariant mass and a large rapidity difference. No significant excess of events with respect to the Standard Model background predictions is observed. The results are interpreted in a benchmark scenario of the Phenomenological Type-I Seesaw model. New constraints are set on the values of the |𝑉&sub(𝑒𝑁)|*2 and |𝑉&sub(𝑒𝑁)𝑉&sup(∗ )&sub(*m𝑁)| parameters for heavy Majorana neutrino masses between 50 GeV and 20 TeV, where 𝑉𝓁𝑁 is the matrix element describing the mixing of the heavy Majorana neutrino mass eigenstate with the Standard Model neutrino of flavour 𝓁 = 𝑒, *m. The sensitivity to the Weinberg operator is investigated and constraints on the effective 𝑒𝑒 and 𝑒*m Majorana neutrino masses are reported. The statistical combination of the 𝑒𝑒 and 𝑒*m channels with the previously published *m*m channel is performed



Спец.(статьи,препринты) = С 346.1а - Свойства нейтрино
Спец.(статьи,препринты) = С 346.6е1 - Рождение прямых лептонов в соударениях элементарных частиц. Новые лептоны. Тау- лептон
ОИЯИ = ОИЯИ (JINR)2024