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231019|2022 ne s a eng d |
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|a 10.1016/j.physletb.2022.137106
|2 doi
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|a koha001008303
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|b rus
|c RU-ToGU
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|a A search for an unexpected asymmetry in the production of e+μ− and e−μ+ pairs in proton–proton collisions recorded by the ATLAS detector at √s = 13 TeV
|c G. Aad, B. Abbott, D. C. Abbott [et al.]
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|a Текст
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|a электронный
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|a Библиогр.: 59 назв.
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|a This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e(+)mu(-) and e(-)mu(+) pairs to constrain physics processes beyond the Standard Model. It uses 139 fb(-1) of proton-proton collision data recorded at root s = 13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e(+)mu(-) and e(-)mu(+), the search contains two broad signal regions which are used to provide model-independent constraints on the ratio of cross sections at the 2% level. The search also has two special selections targeting supersymmetric models and leptoquark signatures. Observations using one of these selections are able to exclude, at 95% confidence level, singly produced smuons with masses up to 640 GeV in a model in which the only other light sparticle is a neutralino when the R-parity-violating coupling lambda(23)(1)' is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when g(1R)(eu) = g(1R)(mu c) = 1, at 95% confidence level. The limit on the coupling reduces to g(1R)(eu) = g(1R)(mu c) = 0.46 for a mass of 1420 GeV. (C) 2022 The Author(s). Published by Elsevier B.V.
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|a протон-протонные столкновения
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| 653 |
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|a ATLAS, детектор
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| 653 |
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|a скалярные лептокварки
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|a статьи в журналах
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|a Aad, G.
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|a Abbott, B.
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|a Abbott, D. C.
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|a Aliev, M.
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|a Kostyukhin, Vadim V.
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|a Kuchinskaya, Olesya I.
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|a Penzin, Maxim S.
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|t Physics Letters B
|d 2022
|g Vol. 830. P. 137106 (1-22)
|x 0370-2693
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|a RU-ToGU
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|u http://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001008303
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|a статья
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|c 1008303
|d 1008303
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