Evidence for the production of three massive vector bosons with the ATLAS detector
Published in Physics Letters B, 2019
Abstract: A search for the production of three massive vector bosons in proton–proton collisions is performed using data at $\sqrt{s} = 13$ TeV recorded with the ATLAS detector at the Large Hadron Collider in the years 2015–2017, corresponding to an integrated luminosity of 79.8 fb-1. Events with two same-sign leptons ℓ (electrons or muons) and at least two reconstructed jets are selected to search for $WWW \to \ell\nu \ell\nu qq$. Events with three leptons without any same-flavour opposite-sign lepton pairs are used to search for $WWW \to \ell\nu \ell\nu \ell\nu$, while events with three leptons and at least one same-flavour opposite-sign lepton pair and one or more reconstructed jets are used to search for $WWZ \to \ell\nu qq \ell\ell$. Finally, events with four leptons are analysed to search for $WWZ \to \ell\nu \ell\nu \ell\ell$ and $WZZ \to qq \ell\ell \ell\ell$. Evidence for the joint production of three massive vector bosons is observed with a significance of 4.1 standard deviations, where the expectation is 3.1 standard deviations.
DOI: https://doi.org/10.1016/j.physletb.2019.134913
Recommended citation: ATLAS Collaboration. (2019). "Evidence for the production of three massive vector bosons with the ATLAS detector." Phys. Lett. B. 798: 134913.
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