Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector



Aad, G, Abbott, B, Abeling, K, Abicht, NJ, Abidi, SH, Aboulhorma, A, Abramowicz, H, Abreu, H, Abulaiti, Y, Abusleme Hoffman, AC
et al (show 2924 more authors) (2025) Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector PHYSICS LETTERS B, 865. p. 139472. ISSN 0370-2693, 1873-2445

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Abstract

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, μ) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons Z<inf>d</inf>: S→Z<inf>d</inf>Z<inf>d</inf>→4ℓ, where the Z<inf>d</inf> 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 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, σ(gg→S)×B(S→Z<inf>d</inf>Z<inf>d</inf>→4ℓ), as a function of the mass of both particles, m<inf>S</inf> and m<inf>Zd</inf>.

Item Type: Article
Uncontrolled Keywords: 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences
Divisions: Faculty of Health & Life Sciences
Faculty of Science & Engineering
Faculty of Science & Engineering > School of Physical Sciences
Faculty of Health & Life Sciences > Inst. Systems, Molec & Integrative Biology > Inst. Systems, Molec & Integrative Biology
Depositing User: Symplectic Admin
Date Deposited: 22 Apr 2025 09:51
Last Modified: 23 May 2026 10:00
DOI: 10.1016/j.physletb.2025.139472
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3191487
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