Aad, GeorgesAbbott, BradAbeling, KarinBeddall, Andrew JohnÇetin, Serkant AliÖztürk, SertaçŞimşek, Sinem2025-04-182025-04-182023Aad, G., Abbott, B., Abbott, D. C., Abeling, K., Abidi, S. H., Aboulhorma, A., ... & Ballabene, E. (2023). Measurement of the Higgs boson mass in the H→ ZZ⁎→ 4ℓ decay channel using 139 fb− 1 of s= 13 TeV pp collisions recorded by the ATLAS detector at the LHC. Physics Letters B, 843, 137880.0370-26931873-2445http://dx.doi.org/10.1016/j.physletb.2023.137880https://hdl.handle.net/20.500.12713/7171The mass of the Higgs boson is measured in the H -> Z Z* -> 4l decay channel. The analysis uses proton-proton collision data from the Large Hadron Collider at a centre-of-mass energy of 13 TeV recorded by the ATLAS detector between 2015 and 2018, corresponding to an integrated luminosity of 139 fb(-1). The measured value of the Higgs boson mass is 124.99 0.18(stat.) +/- 0.04(syst.) GeV. In final states with muons, this measurement benefits from an improved momentum-scale calibration relative to that adopted in previous publications. The measurement also employs an analytic model that takes into account the invariant-mass resolution of the four-lepton system on a per-event basis and the output of a deep neural network discriminating signal from background events. This measurement is combined with the corresponding measurement using 7 and 8 TeV pp collision data, resulting in a Higgs boson mass of 124.94 +/- 0.17(stat.) +/- 0.03(syst.) GeV. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3.eninfo:eu-repo/semantics/openAccessArticle843123WOS:0012567472000012-s2.0-85165892442Q110.1016/j.physletb.2023.137880Q1