A search for the Zγ decay mode of the Higgs boson in pp collisions at √s=13 TeV with the ATLAS detector



Aad, G, Abbott, B, Abbott, DC, Abud, A, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2943 more authors) (2020) A search for the Zγ decay mode of the Higgs boson in pp collisions at √s=13 TeV with the ATLAS detector PHYSICS LETTERS B, 809. 135754-. ISSN 0370-2693, 1873-2445

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Abstract

A search for the Zγ decay of the Higgs boson, with Z boson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at s = 13 TeV corresponding to an integrated luminosity of 139 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p-value of 1.3%. An upper limit at 95% confidence level on the production cross-section times the branching ratio for pp→H→Zγ is set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0<inf>−0.9</inf> +1.0 where the statistical component of the uncertainty is dominant.

Item Type: Article
Additional Information: 37 pages in total, author list starting page 21, 2 figures, 3 tables, submitted to PLB. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2018-42
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 19 Oct 2020 08:48
Last Modified: 16 Jun 2026 14:55
DOI: 10.1016/j.physletb.2020.135754
Open Access URL: https://www.sciencedirect.com/science/article/pii/...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3104580
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