Constraining a general U(1)$^\prime$ inverse seesaw model from vacuum stability, dark matter and collider

TL;DR

This paper explores a gauged U(1) inverse seesaw model extending the Standard Model, analyzing its vacuum stability, dark matter properties, and collider constraints to identify viable parameter space.

Contribution

It introduces a novel U(1) inverse seesaw model with a stable dark matter candidate and provides comprehensive bounds from theoretical and experimental constraints.

Findings

Model satisfies vacuum stability and unitarity bounds.

Dark matter relic density and direct detection constraints are met.

Collider data restricts Z' mass and gauge coupling range.

Abstract

We consider a class of gauged $U(1)$ extensions of the Standard Model (SM), where the light neutrino masses are generated by an inverse seesaw mechanism. In addition to the three right handed neutrinos, we add three singlet fermions and demand an extra $Z_2$ symmetry under which, the third generations of both of the neutral fermions are odd, which in turn gives us a stable dark matter candidate. We express the $U(1)$ charges of all the fermions in terms of the U(1) charges of the standard model Higgs and the new complex scalar. We study the bounds on the parameters of the model from vacuum stability, perturbative unitarity, dark matter relic density and direct detection constraints. We also obtain the collider constraints on the $Z'$ mass and the $U(1)'$ gauge coupling. Finally we compare all the bounds on the $Z'$ mass versus the $U(1)'$ gauge coupling plane.