Multiboson production in W' decays

TL;DR

This paper explores multiboson signals from W' boson decays in models with extended gauge and scalar sectors, highlighting potential explanations for ATLAS fat jet excesses through cascade decay channels.

Contribution

It introduces a novel decay channel W' → WZX with significant branching ratios, expanding the understanding of multiboson signals in extended gauge models.

Findings

W' → WZ decays can be suppressed in certain models.

The W' → WZX decay channel can have branching ratios around 4%.

Potential interpretation of ATLAS fat jet excesses via these cascade decays.

Abstract

In models with an extra $\text{SU}(2)_R$ gauge group and an extended scalar sector, the cascade decays of the $W'$ boson can provide various multiboson signals. In particular, diboson decays $W' \to WZ$ can be suppressed while $W' \to WZX$, with $X$ one of the scalars present in the model, can reach branching ratios around 4%. We discuss these multiboson signals focusing on possible interpretations of the ATLAS excess in fat jet pair production.