Probing the $H^\pm W^\mp Z$ interaction at the high energy upgrade of the LHC

TL;DR

This paper investigates the potential to detect the $H^\u2215 W^rame Z$ interaction at a future 27 TeV collider, focusing on production and decay channels, and compares the sensitivity to previous lower-energy studies.

Contribution

It provides a model-agnostic analysis of the $H^\u2215 W^rame Z$ interaction at a 27 TeV collider, highlighting improved discovery prospects and recasting results in the Georgi-Machacek model.

Findings

$H^\u2215 j j$ production offers greater sensitivity than $Z H^\u2215$.

Discovery potential is significantly enhanced at 27 TeV compared to lower energies.

Results are applicable to the Georgi-Machacek model.

Abstract

An $H^\pm W^\mp Z$ interaction at the tree level is common feature of new physics models that feature scalar triplets. In this study, we aim to probe the strength of the aforementioned interaction in a model-agnostic fashion at the futuristic 27 TeV proton-proton collider. We assume that the $H^\pm$ couples dominantly to ($W^\pm,Z$) and ($t,b$). We specifically study the processes that involve the $H^\pm W^\mp Z$ vertex at the production level, that is, $p p \to H^\pm j j$ and $p p \to Z H^\pm$. Moreover, we look into both $H^\pm \to W^\pm Z,~t b$ decays for either production process. Our investigations reveal that the $H^\pm j j$ production process has a greater reach compared to $Z H^\pm$. Moreover, the discovery potential of a charged Higgs improves markedly with respect to the earlier studies corresponding to lower centre-of-mass energies. Finally, we recast our results in the context of the popular Georgi-Machacek model.