Measurement of the Zγ→ννγ production cross section in <i>pp</i> collisions at √s=13 TeV with the ATLAS detector and limits on anomalous triple gauge-boson couplings



Aaboud, M, Aad, G, Abbott, B, Abdinov, O, Abeloos, B, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2923 more authors) (2018) Measurement of the Zγ→ννγ production cross section in <i>pp</i> collisions at √s=13 TeV with the ATLAS detector and limits on anomalous triple gauge-boson couplings. JOURNAL OF HIGH ENERGY PHYSICS, 12 (12). 010-.

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Abstract

The production of $Z$ bosons in association with a high-energy photon ($Z\gamma$ production) is studied in the neutrino decay channel of the $Z$ boson using $pp$ collisions at $\sqrt{s}$ = 13 TeV. The analysis uses a data sample with an integrated luminosity of 36.1 fb$^{-1}$ collected by the ATLAS detector at the LHC in 2015 and 2016. Candidate $Z\gamma$ events with invisible decays of the $Z$ boson are selected by requiring significant transverse momentum ($p_{T}$) of the dineutrino system in conjunction with a single isolated photon with large transverse energy ($E_{T}$). The rate of $Z\gamma$ production is measured as a function of photon $E_{T}$, dineutrino system $p_{T}$ and jet multiplicity. Evidence of anomalous triple gauge-boson couplings is sought in $Z\gamma$ production with photon $E_{T}$ greater than 600 GeV. No excess is observed relative to the Standard Model expectation, and upper limits are set on the strength of $ZZ\gamma$ and $Z\gamma\gamma$ couplings.

Item Type: Article
Additional Information: 42 pages in total, author list starting page 26, 7 figures, 9 tables, published in JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-18/
Uncontrolled Keywords: Hadron-Hadron scattering (experiments)
Depositing User: Symplectic Admin
Date Deposited: 19 Feb 2019 15:25
Last Modified: 14 Oct 2023 11:23
DOI: 10.1007/JHEP12(2018)010
Open Access URL: https://link.springer.com/article/10.1007/JHEP12(2...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3032512