Extended Zee model for Neutrino Mass, Leptogenesis and Sterile Neutrino like Dark Matter

TL;DR

This paper introduces an extended model with a $U(1)_{B-L}$ symmetry that explains neutrino masses, dark matter, and matter-antimatter asymmetry through leptogenesis, with a sterile neutrino as dark matter.

Contribution

It presents a novel extension of the standard model that unifies neutrino mass generation, dark matter, and leptogenesis within a $U(1)_{B-L}$ framework.

Findings

Leptogenesis successfully explains matter-antimatter asymmetry.

The model predicts a MeV-scale sterile neutrino as dark matter.

Neutrino masses are generated via soft breaking of $U(1)_{B-L}$.

Abstract

We propose an extension of the standard model with a $U(1)_{\rm B-L}$ global symmetry that accommodates radiative neutrino masses along with dark matter and leptogenesis. The observed matter antimatter asymmetry of the universe is generated through the leptogenesis route keeping the $U(1)_{\rm B-L}$ symmetry intact. The $B-L$ global symmetry is then softly broken, providing the sub-eV neutrino masses. The model then incorporates a MeV scale sterile neutrino like dark matter.