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Search for the decay of the Higgs boson to a Z boson and a light pseudoscalar particle decaying to two photons
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SYSNO ASEP 0587963 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Search for the decay of the Higgs boson to a Z boson and a light pseudoscalar particle decaying to two photons Author(s) Aad, G. (FR)
Abbott, B. (US)
Abeling, K. (DE)
Chudoba, Jiří (FZU-D) RID, ORCID
Federičová, Pavla (FZU-D) ORCID
Hejbal, Jiří (FZU-D) RID, ORCID
Jačka, Petr (FZU-D) ORCID
Kepka, Oldřich (FZU-D) RID, ORCID
Kroll, Jiří (FZU-D) ORCID
Kupčo, Alexander (FZU-D) RID, ORCID
Latoňová, Věra (FZU-D) ORCID
Lokajíček, Miloš (FZU-D) RID, ORCID
Lysák, Roman (FZU-D) RID, ORCID
Marčišovský, Michal (FZU-D) RID, ORCID
Mikeštíková, Marcela (FZU-D) RID, ORCID
Němeček, Stanislav (FZU-D) RID, ORCID
Šícho, Petr (FZU-D) RID, ORCID
Staroba, Pavel (FZU-D) RID, ORCID
Svatoš, Michal (FZU-D) RID, ORCID
Taševský, Marek (FZU-D) RID, ORCIDNumber of authors 2934 Article number 138536 Source Title Physics Letters. B. - : Elsevier - ISSN 0370-2693
Roč. 850, Mar (2024)Number of pages 24 s. Language eng - English Country NL - Netherlands Keywords branching ratio: upper limit ; category ; photon: pair production Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics Research Infrastructure CERN-CZ III - 90240 - Fyzikální ústav AV ČR, v. v. i. Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 001202034400001 EID SCOPUS 85186584048 DOI https://doi.org/10.1016/j.physletb.2024.138536 Annotation A search for the decay of the Higgs boson to a ZZ boson and a light, pseudoscalar particle, aa, decaying respectively to two leptons and to two photons is reported. The search uses the full LHC Run 2 proton-proton collision data at s=13s =13 TeV, corresponding to 139 fb−1−1 collected by the ATLAS detector. This is one of the first searches for this specific decay mode of the Higgs boson, and it probes unexplored parameter space in models with axion-like particles (ALPs) and extended scalar sectors. The mass of the aa particle is assumed to be in the range 0.1-33 GeV. The data are analysed in two categories: a merged category where the photons from the aa decay are reconstructed in the ATLAS calorimeter as a single cluster, and a resolved category in which two separate photons are detected. The main background processes are from Standard Model ZZ boson production in association with photons or jets. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2025 Electronic address https://hdl.handle.net/11104/0355035
Number of the records: 1