Search for heavy resonances decaying into a pair of Z bosons in the ℓ+ℓ−ℓ′+ℓ′−ℓ+ℓ−ℓ′+ℓ′− and ℓ+ℓ−ννˉℓ+ℓ−ννˉ final states using 139 fb−1fb−1 of proton–proton collisions at s=13 s ​=13TeV with the ATLAS detector

ATLAS Publications, T.M. Carter, M. Faucci Giannelli, A. Hasib, M.P. Heath, S. Palazzo, A. Søgaard, E.P. Takeva, A.J. Taylor, N. Themistokleous, E.M. Villhauer

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Abstract / Description of output

A search for heavy resonances decaying into a pair of Z bosons leading to ℓ+ℓ−ℓ′+ℓ′−ℓ+ℓ−ℓ′+ℓ′− and ℓ+ℓ−ννˉℓ+ℓ−ννˉ final states, where ℓℓ 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 integrated luminosity of 139 fb−1fb−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.
Original languageEnglish
Article number332
Pages (from-to)1-39
Number of pages39
JournalThe European Physical Journal C
Volume81
Issue number4
DOIs
Publication statusPublished - 19 Apr 2021

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