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

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, $pp\to H^{\pm }jj$ and $pp\to Z{H}^{\pm }$. Moreover, we look into both $H^{\pm }\to W^{\pm }Z,tb$ decays for either production process. Our investigations reveal that the $H^{\pm }jj$ 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.

Comments: Version 2; Accepted for publication in EPJC