Research output: Contribution to journal › Article › peer-review
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. / Анисёнков, Алексей Владимирович; Балдин, Евгений Михайлович; Белобородов, Константин Иванович et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 830, 137106, 10.07.2022.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - 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
AU - Анисёнков, Алексей Владимирович
AU - Балдин, Евгений Михайлович
AU - Белобородов, Константин Иванович
AU - Бобровников, Виктор Сергеевич
AU - Bogdanchikov, A. G.
AU - Бузыкаев, Алексей Рафаилович
AU - Казанин, Василий Федорович
AU - Харламов, Алексей Георгиевич
AU - Харламова, Татьяна Александровна
AU - Масленников, Алексей Леонидович
AU - Максимов, Дмитрий Александрович
AU - Пелеганчук, Сергей Владимирович
AU - Подберёзко, Павел Сергеевич
AU - Резанова, Ольга Леонардовна
AU - Сухарев, Андрей Михайлович
AU - Талышев, Алексей Александрович
AU - Тихонов, Юрий Анатольевич
AU - Жуланов, Владимир Викторович
N1 - This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e+μ− and e−μ+ pairs to constrain physics processes beyond the Standard Model. It uses 139fb−1 of proton–proton collision data recorded at s=13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e+μ− to e−μ+, 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 λ231 ′ is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when g1R eu=g1R μc=1, at 95% confidence level. The limit on the coupling reduces to g1R eu=g1R μc=0.46 for a mass of 1420 GeV.
PY - 2022/7/10
Y1 - 2022/7/10
N2 - This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e+μ− and e−μ+ pairs to constrain physics processes beyond the Standard Model. It uses 139fb−1 of proton–proton collision data recorded at s=13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e+μ− to e−μ+, 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 λ231′ is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when g1Reu=g1Rμc=1, at 95% confidence level. The limit on the coupling reduces to g1Reu=g1Rμc=0.46 for a mass of 1420 GeV.
AB - This search, a type not previously performed at ATLAS, uses a comparison of the production cross sections for e+μ− and e−μ+ pairs to constrain physics processes beyond the Standard Model. It uses 139fb−1 of proton–proton collision data recorded at s=13 TeV at the LHC. Targeting sources of new physics which prefer final states containing e+μ− to e−μ+, 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 λ231′ is close to unity. Observations using the other selection exclude scalar leptoquarks with masses below 1880 GeV when g1Reu=g1Rμc=1, at 95% confidence level. The limit on the coupling reduces to g1Reu=g1Rμc=0.46 for a mass of 1420 GeV.
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85151987732&origin=inward&txGid=18cd38b3e2acb0252423972ef65e8124
UR - https://www.mendeley.com/catalogue/a8024d4e-65e6-3bc9-90b7-6bfcf5c58fee/
U2 - 10.1016/j.physletb.2022.137106
DO - 10.1016/j.physletb.2022.137106
M3 - Article
VL - 830
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
SN - 0370-2693
M1 - 137106
ER -
ID: 55726253