0627734 - FZÚ 2026 RIV DE eng J - Journal Article
Aad, G. - Aakvaag, E. - Abbott, B. - Chudoba, Jiří - Federičová, Pavla - Hejbal, Jiří - Jačka, Petr - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Latoňová, Věra - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Nechanský, Filip - Němeček, Stanislav - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2929 authors
Search for a light charged Higgs boson in t → H^±b decays, with H^± → cs, in pp collisions at √s=13 TeV with the ATLAS detector.
European Physical Journal C. Roč. 85, č. 2 (2025), č. článku 153. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT(CZ) EH22_008/0004632
Research Infrastructure: CERN-CZ III - 90240
Institutional support: RVO:68378271
Keywords : ATLAS * CERN * top quark
OECD category: Particles and field physics
Impact factor: 4.2, year: 2023 ; AIS: 1.119, rok: 2023
Method of publishing: Open access
DOI: https://doi.org/10.1140/epjc/s10052-024-13715-4

A search for a light charged Higgs boson produced in decays of the top quark, t→H±b with H±→cs, is presented. This search targets the production of top-quark pairs ttˉ→WbH±b, with W→ℓν (ℓ=e,μ), resulting in a lepton-plus-jets final state characterised by an isolated electron or muon and at least four jets. The search exploits b-quark and c-quark identification techniques as well as multivariate methods to suppress the dominant ttˉttˉ background. The data analysed correspond to 140 fb−1 of pp collisions at √s=13 TeV recorded with the ATLAS detector at the LHC between 2015 and 2018. Observed (expected) 95% confidence-level upper limits on the branching fraction B(t→H±b), assuming B(t→Wb)+B(t→H±(→cs)b)=1.0, are set between 0.066% (0.077%) and 3.6% (2.3%) for a charged Higgs boson with a mass between 60 and 168 GeV.
Permanent Link: https://hdl.handle.net/11104/0366532