PoS - Proceedings of Science
Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Posters: Top Quark and Electroweak Physics
Measurements of inclusive four-lepton production at ATLAS
X. Liu* on behalf of the ATLAS collaboration
*corresponding author
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Pre-published on: February 20, 2021
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Measurements of differential and integrated fiducial cross-sections in events with two same-flavor, opposite-sign electron or muon pairs are presented with the data corresponding to 139 fb$^{-1}$ of $\sqrt{s} = 13$ TeV proton--proton collisions collected by the ATLAS dectector during Run 2 of LHC operations (2015--2018). The differential cross-sections exhibit a rich structure with contributions from a number of Standard Model processes. The measurements are performed and compared to state-of-the-art Standard Model calculations, which are found to be consistent with data. The branching ratio of the rare $Z\rightarrow4\ell$ decay is extracted. Constraints on a new physics model based on a spontaneously broken B-L gauge symmetry are also evaluated.
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