A chiral model for sterile neutrino

TL;DR

This paper introduces a chiral extension of the standard model with a new U(1)' gauge symmetry to naturally explain the lightness of sterile neutrinos and also proposes a dark matter candidate.

Contribution

It presents a novel anomaly-free chiral U(1)' model that accounts for eV-mass sterile neutrinos and includes a potential dark matter candidate.

Findings

Model naturally explains sterile neutrino lightness

Provides a WIMP-like dark matter candidate

Ensures anomaly cancellation in the extended gauge symmetry

Abstract

A model, which extends the standard model with a new chiral U(1)$'$ gauge symmetry sector, for the eV-mass sterile neutrino is constructed. It is basically fixed by anomaly free conditions. The lightness of the sterile neutrino has a natural explanation. As a by product, this model provides a WIMP-like dark matter candidate.