Baryon number asymmetry and dark matter in the neutrino mass model with an inert doublet

TL;DR

This paper investigates a neutrino mass model with an inert doublet scalar that aims to explain neutrino masses, dark matter, and baryon asymmetry, but finds challenges in generating sufficient baryon asymmetry consistent with recent neutrino data.

Contribution

The study reexamines the model's ability to produce baryon asymmetry under updated neutrino oscillation constraints and explores two possible modifications.

Findings

Baryon asymmetry is difficult to generate with current neutrino data.

Right-handed neutrinos in TeV scale hinder sufficient baryon asymmetry.

Two modifications of the model are proposed for better consistency.

Abstract

The radiative neutrino mass model with an inert doublet scalar has been considered as a promising candidate which can explain neutrino masses, dark matter abundance and baryon number asymmetry if dark matter is identified with the lightest neutral component of the inert doublet. We reexamine these properties by imposing all the data of the neutrino oscillation, which are recently suggested by the reactor experiments. We find that the sufficient baryon number asymmetry seems not to be easily generated in a consistent way with all the data of the neutrino masses and mixing as long as the right-handed neutrinos are kept in TeV regions. Two possible modifications of the model are examined.