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Search for non-resonant Higgs boson pair production in the bbℓνℓν final state with the ATLAS detector in pp collisions at √s = 13 TeV

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    0537262 - FZÚ 2021 RIV NL eng J - Journal Article
    Aad, G. - Abbott, B. - Abbott, D.C. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2927 authors
    Search for non-resonant Higgs boson pair production in the bbℓνℓν final state with the ATLAS detector in pp collisions at √s = 13 TeV.
    Physics Letters. B. Roč. 801, Feb (2020), s. 1-22, č. článku 135145. ISSN 0370-2693. E-ISSN 1873-2445
    R&D Projects: GA MŠk(CZ) LTT17018
    Research Infrastructure: CERN-CZ II - 90104
    Institutional support: RVO:68378271
    Keywords : ATLAS * CERN * LHC * Higgs particle * pair production * bottom * tau
    OECD category: Particles and field physics
    Impact factor: 4.771, year: 2020
    Method of publishing: Open access

    A search for non-resonant Higgs boson pair production, as predicted by the Standard Model, is presented, where one of the Higgs bosons decays via the H→bb channel and the other via one of the H→WW⁎/ZZ⁎/ττ channels. The analysis selection requires events to have at least two b -tagged jets and exactly two leptons (electrons or muons) with opposite electric charge in the final state. Candidate events consistent with Higgs boson pair production are selected using a multi-class neural network discriminant. The analysis uses 139 fb −1 of pp collision data recorded at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. An observed (expected) upper limit of 1.2 ( 0.9−0.3+0.4 ) pb is set on the non-resonant Higgs boson pair production cross-section at 95% confidence level, which is equivalent to 40 ( 29−9+14 ) times the value predicted in the Standard Model.

    Permanent Link: http://hdl.handle.net/11104/0314995

     
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