Traces of a triboson resonance
J.A. Aguilar-Saavedra, J.H. Collins, S. Lombardo

TL;DR
This paper proposes that certain excesses in high-mass diboson searches can be explained by a new triboson resonance involving an additional particle, suggesting new decay channels and discovery strategies.
Contribution
It introduces a novel triboson resonance model that accounts for observed excesses and null results, expanding the understanding of potential new physics signals.
Findings
Compatibility of excesses with a triboson decay model
Identification of candidate intermediate particles like $Y^0$
Strategies for discovering triboson resonances with existing searches
Abstract
We show that the relatively small but coincident excesses observed around 2 TeV in the ATLAS Run 1 and Run 2 hadronic diboson searches --- when a cut on the number of tracks in the fat jets is not applied --- and the null results of all remaining high-mass diboson searches are compatible with the decay of a triboson resonance into plus an extra particle . These decays can take place via new neutral () or charged () particles, namely , with , or , with . An obvious candidate for such intermediate particle is a neutral one , given a excess found at 650 GeV by the CMS Collaboration in searches for intermediate mass diboson resonances decaying to , with . We discuss discovery strategies for triboson resonances with small modifications of existing hadronic searches.
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