Search for heavy resonances decaying into a pair of Z bosons in the 𝓵+𝓵-𝓵'+𝓵'- and 𝓵+𝓵-νν̅ final states using 139 fb-1 of proton-proton collisions at √s = 13 TeV with the ATLAS detector
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Colleges, School and Institutes
A search for heavy resonances decaying into a pair of Z bosons leading to 𝓵+𝓵-𝓵'+𝓵'- and 𝓵+𝓵-νν̅ final states, where 𝓵 stands for either an electron or a muon, is presented. The search uses proton-proton collision data at a centre-of-mass energy of 13 TeV collected from 2015 to 2018 that corresponds to the full integrated luminosity of 139 fb-1 recorded by the ATLAS detector during Run 2 of the Large Hadron Collider. Different mass ranges spanning 200 GeV to 2000 GeV for the hypothetical resonances are considered, depending on the final state and model. In the absence of a significant observed excess, the results are interpreted as upper limits on the production cross section of a spin-0 or spin-2 resonance. The upper limits for the spin-0 resonance are translated to exclusion contours in the context of Type-I and Type-II two-Higgs-doublet models, and the limits for the spin-2 resonance are used to constrain the Randall--Sundrum model with an extra dimension giving rise to spin-2 graviton excitations.
53 pages in total, author list starting page 37, 8 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HIGG-2018-09
|Number of pages||39|
|Journal||Eur. Phys. J. C|
|Publication status||Published - 19 Apr 2021|