Radiative corrections to Higgs couplings with weak gauge bosons in custodial multi-Higgs models

TL;DR

This paper computes one-loop radiative corrections to Higgs couplings with weak gauge bosons in various custodial symmetric multi-Higgs models, revealing distinct model-specific deviations consistent with current constraints.

Contribution

It provides the first detailed calculation of radiative corrections to $hZZ$ and $hWW$ couplings in these models, highlighting their unique correlation patterns.

Findings

Different models predict non-overlapping deviations in Higgs couplings.

Corrections are consistent with existing experimental constraints.

Distinct correlation patterns can help differentiate models.

Abstract

We calculate 1-loop radiative corrections to the $hZZ$ and $hWW$ couplings in models with next--to--simplest Higgs sectors satisfying the electroweak $\rho$ parameter equal to 1 at tree level: the Higgs singlet model, the two-Higgs doublet models, and the Georgi-Machacek model. Under theoretical and current experimental constraints, the three models have different correlations between the deviations in the $hZZ$ and $hWW$ couplings from the standard model predictions. In particular, we find for each model predictions with no overlap with the other two models.