Inverse Seesaw Mechanism and Axion Portal Fermionic Dark Matter

TL;DR

This paper introduces a minimal extension of the Standard Model that simultaneously explains small neutrino masses and fermionic dark matter through the inverse seesaw mechanism and an axion portal, with testable predictions.

Contribution

It presents a unified model linking neutrino mass generation and dark matter via an axion portal, avoiding high energy scales and compatible with current experimental constraints.

Findings

Model consistent with neutrino oscillation data

Dark matter relic density matches observations

Satisfies muon g-2 measurements

Abstract

We propose a minimal extension of the Standard Model (SM) that addresses both the smallness of neutrino masses and the dark matter (DM) puzzle via the inverse seesaw mechanism and an axion portal fermionic DM. This model generates light neutrino masses without requiring high energy scales, enhancing its testability in future collider experiments. An axion-like particle (ALP) connects the SM and DM sectors, yielding a distinct phenomenology. Our analysis shows that the model is consistent with constraints from neutrino oscillations and DM relic density as well as satisfying the current measurement on muon $g-2$. This work offers a unified framework to address neutrino masses and DM, with implications for particle physics and cosmology.