Aad, G.Abbott, B.Abeling, K.Abicht, N. J.Abidi, S. H.Aboulhorma, A.Zwalinski, L.2025-05-102025-05-1020250370-26931873-2445https://doi.org/10.1016/j.physletb.2025.139472Redlinger, George/0000-0002-6437-9991; Borissov, Guennadi/0000-0002-4226-9521; Barton, Adam/0000-0001-9696-9497; Winter, Benedict Tobias/0000-0001-9606-7688; Meng, Lingxin/0000-0002-2901-6589; Cheu, Elliott/0000-0002-2562-9724; Wharton, Andrew/0000-0002-9507-1869; Kretzschmar, Jan/0000-0002-8515-1355; Meloni, Federico/0000-0001-7075-2214; Bouhova-Thacker, Evelina/0000-0002-5103-1558; Terzo, Stefano/0000-0003-3388-3906; Abusleme, Angel/0000-0003-0762-7204; Smirnova, Oxana/0000-0003-2517-531X; Mckee, Shawn/0000-0002-4551-4502; Jia, Jiangyong/0000-0002-5725-3397; Butterworth, Jonathan/0000-0002-5905-5394; Muenstermann, Daniel/0000-0001-6223-2497; Jones, Roger/0000-0002-6427-3513; Kartvelishvili, Vakhtang/0000-0002-1957-3787; Fox, Harald/0000-0003-3089-6090;A search is conducted for a new scalar boson S, with a mass distinct from that of the Higgs boson, decaying promptly into four leptons (l = e, mu) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons Z(d): S -> Z(d)Z(d) -> 4l, where the Z(d) boson has a mass between 15 and 300 GeV, and the S boson has a mass between either 30 and 115 GeV or 130 and 800 GeV. The search uses proton-proton collision data collected with the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb(-1) at a centre-of-mass energy of root s = 13 TeV. No significant excess above the Standard Model background expectation is observed. Upper limits at 95% confidence level are set on the production cross-section times branching ratio, sigma(gg -> S) x B(S -> Z(d)Z(d) -> 4l), as a function of the mass of both particles, m(S) and m(Zd).eninfo:eu-repo/semantics/openAccessArticle2-s2.0-10500347035010.1016/j.physletb.2025.139472