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Search for new phenomena in final states with two leptons and one or no b-tagged jets at √s= 13 TeV using the ATLAS detector

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    0548543 - FZÚ 2022 RIV US eng J - Journal Article
    Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2870 authors
    Search for new phenomena in final states with two leptons and one or no b-tagged jets at √s= 13 TeV using the ATLAS detector.
    Physical Review Letters. Roč. 127, č. 14 (2021), č. článku 141801. ISSN 0031-9007. E-ISSN 1079-7114
    R&D Projects: GA MŠMT(CZ) LTT17018
    Research Infrastructure: CERN-CZ II - 90104
    Institutional support: RVO:68378271
    Keywords : ATLAS * bottom: particle identification * muon * electron
    OECD category: Particles and field physics
    Impact factor: 9.185, year: 2021
    Method of publishing: Open access

    A search for new phenomena is presented in final states with two leptons and one or no b-tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is based on the full run-2 proton-proton collision dataset recorded at a center-of-mass energy of s=13  TeV by the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 139  fb-1. No significant deviation from the expected background is observed in the data. Inspired by the B-meson decay anomalies, a four-fermion contact interaction between two quarks (b, s) and two leptons (ee or μμ) is used as a benchmark signal model, which is characterized by the energy scale and coupling, Λ and g*, respectively. Contact interactions with Λ/g* lower than 2.0 (2.4) TeV are excluded for electrons (muons) at the 95% confidence level, still far below the value that is favored by the B-meson decay anomalies.

    Permanent Link: http://hdl.handle.net/11104/0324593

     
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