Search for Higgs boson decays to beyond-the-Standard-Model light bosons in four-lepton events with the ATLAS detector at √<i>s</i>=13 TeV



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H, Abreu, H
et al (show 2873 more authors) (2018) Search for Higgs boson decays to beyond-the-Standard-Model light bosons in four-lepton events with the ATLAS detector at √<i>s</i>=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 06 (6). 166-.

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Abstract

A search is conducted for a new beyond-the-Standard-Model boson using events where a Higgs boson with mass 125 GeV decays to four leptons ($\ell =$ $e$ or $\mu$). This decay is presumed to occur via an intermediate state which contains one or two on-shell, promptly decaying bosons: $H\rightarrow ZX/XX \rightarrow 4\ell$, where $X$ is a new vector boson $Z_d$ or pseudoscalar $a$ with mass between 1 and 60 GeV. The search uses $pp$ collision data collected with the ATLAS detector at the LHC with an integrated luminosity of 36.1 fb$^{-1}$ at a centre-of-mass energy $\sqrt{s}=13$ TeV. No significant excess of events above Standard Model background predictions is observed; therefore, upper limits at 95% confidence level are set on model-independent fiducial cross-sections, and on the Higgs boson decay branching ratios to vector and pseudoscalar bosons in two benchmark models.

Item Type: Article
Additional Information: 50 pages in total, author list starting page 34, 10 figures, 5 tables, submitted to JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-22/
Uncontrolled Keywords: Beyond Standard Model, Hadron-Hadron scattering (experiments)
Depositing User: Symplectic Admin
Date Deposited: 20 Aug 2018 08:24
Last Modified: 05 Oct 2023 08:53
DOI: 10.1007/JHEP06(2018)166
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3025277