Neutrino masses and self-interacting dark matter with mass mixing $Z-Z^\prime$ gauge portal

TL;DR

This paper investigates a model where a new $U(1)$ gauge symmetry connects neutrino masses, self-interacting dark matter, and a $Z-Z'$ gauge portal, aiming to explain neutrino properties, dark matter abundance, and galactic core structures.

Contribution

It introduces a novel framework linking neutrino mass generation with self-interacting dark matter via $Z-Z'$ mass mixing, addressing multiple astrophysical and particle physics phenomena.

Findings

Parameter space can reproduce observed neutrino masses.

Model explains dark matter relic abundance.

Produces core-like dark matter distribution in galaxies.

Abstract

New light gauge bosons can affect several low-energy experiments, such as atomic parity violation or colliders. Here, we explore the possibility that a dark sector is charged under a new $U(1)$ gauge symmetry, and the portal to the Standard Model is through a $Z-Z'$ mass mixing. In our approach, breaking the new gauge symmetry is crucial to generate neutrino masses. We investigate the parameter space to reproduce neutrino masses, the correct dark matter relic abundance, and to produce the observed core-like DM distribution in galactic centers.