Vacuum stability and scalar masses in the superweak extension of the standard model

TL;DR

This paper analyzes the vacuum stability of the superweak extension of the standard model, identifying parameter regions consistent with experimental constraints where the vacuum remains stable and couplings are perturbative.

Contribution

It provides a comprehensive analysis of the parameter space ensuring vacuum stability in the superweak extension, considering recent experimental constraints.

Findings

A well-defined parameter space with stable vacuum identified

Couplings remain perturbative within the allowed region

Parameter space consistent with W-boson mass and collider constraints

Abstract

We summarize our analysis for the vacuum stability of the superweak extension of the standard model. The parameter space allowed by the $W$-boson mass measurements and collider searches for a new scalar particle are also presented. The final result is a well defined non-vanishing portion of the parameter space, where the vacuum is stable, the couplings are perturbative and is not excluded by $W$ mass measurements and collider searches.