Leptogenesis in the extension of the Zee-Babu model

TL;DR

This paper shows that extending the Zee-Babu model can explain small neutrino masses, baryon asymmetry, and potentially dark matter, with testable predictions at colliders like the LHC and ILC.

Contribution

It introduces a minimal extension of the Zee-Babu model that accounts for neutrino masses, baryogenesis, and dark matter, with a testable TeV-scale scalar.

Findings

TeV-scale singlet scalar can generate baryon asymmetry

Model extensions can produce small neutrino masses

Potential dark matter candidate identified

Abstract

We demonstrate that the extension of the Zee-Babu model can generate not only the small neutrino masses but also the baryon number asymmetry in the universe. In particular, we show that the scale of the singlet scalar responsible for the leptogenesis can be of order 1 TeV, that can be tested at the LHC and ILC. We also considered the possible minimal extension of this model to generate the dark matter.