An extended Higgs sector for neutrino mass, dark matter and baryon asymmetry

TL;DR

This paper proposes a TeV-scale extended Higgs model that simultaneously explains neutrino oscillations, dark matter, and baryon asymmetry through new particles and symmetries, with testable predictions at colliders.

Contribution

It introduces a novel TeV-scale model with an extended Higgs sector and right-handed neutrinos that accounts for multiple cosmological phenomena and offers distinctive collider signatures.

Findings

Neutrino masses generated at three-loop level

Dark matter stability via $Z_2$ symmetry

Predictions testable at LHC and ILC

Abstract

In this talk, we discuss a TeV scale model which would explain neutrino oscillation, dark matter, and baryon asymmetry of the Universe simultaneously by the dynamics of the extended Higgs sector and TeV-scale right-handed neutrinos. By the imposed exact $Z_2$ symmetry, tiny neutrino masses are generated at the three loop level, and the stability of the dark matter candidate, an additional singlet scalar field, is guaranteed. The extra Higgs doublet is introduced not only for neutrino masses but also for successful electroweak baryogenesis. The model provides various discriminative predictions in Higgs phenomenology, which can be tested at the Large Hadron Collider and the International Linear Collider.