Triboson interpretations of the ATLAS diboson excess

TL;DR

This paper explores a new interpretation of the ATLAS diboson excess as a heavy resonance decaying into two gauge bosons plus an extra particle, potentially explaining discrepancies between ATLAS and CMS results.

Contribution

It proposes a triboson decay hypothesis for the ATLAS excess, offering a novel explanation for the observed phenomena and differences in experimental results.

Findings

The excess can be explained by a heavy resonance decaying into two gauge bosons and an additional particle.

This hypothesis accounts for the absence of a similar excess in CMS fat dijet analyses.

It provides a potential link to the Higgs boson as the extra particle.

Abstract

The ATLAS excess in fat jet pair production is kinematically compatible with the decay of a heavy resonance into two gauge bosons plus an extra particle. This hypothesis would explain the absence of such a large excess in the analogous CMS analysis of fat dijet final states, as well as the negative results of diboson resonance searches in the semi-leptonic decay modes. If the extra particle is the Higgs boson, this hypothesis might also explain -statistical fluctuations aside- why the CMS search for WH resonances in the semi-leptonic channel finds some excess while in the fully hadronic one it does not have a significant deviation.