Neutrino masses, dark matter and baryon asymmetry of the Universe

TL;DR

This paper proposes a three-loop radiative model extending the Standard Model with new scalars and right-handed neutrinos to simultaneously explain neutrino masses, dark matter, and baryon asymmetry, with testable collider implications.

Contribution

It introduces a novel three-loop radiative mechanism with specific scalar and neutrino extensions to address multiple fundamental issues in particle physics.

Findings

The lightest right-handed neutrino serves as a dark matter candidate consistent with Planck data.

The model aligns with neutrino oscillation and lepton flavor violation constraints.

Electroweak phase transition can be strongly first order, and Higgs decay channels are affected.

Abstract

In this work, we try to explain the neutrino mass and mixing data radiatively at three-loop by extending the standard model (SM) with two charged singlet scalars and three right handed (RH) neutrinos. Here, the lightest RH neutrino is a dark matter candidate that gives a relic density in agreement with the recent Planck data, the model can be consistent with the neutrino oscillation data, lepton flavor violating processes, the electroweak phase transition can be strongly first order; and the charged scalars may enhance the branching ratio $h\rightarrow\gamma\gamma$, where as $h\rightarrow\gamma Z$ get can get few percent suppression. We also discuss the phenomenological implications of the RH neutrinos at the collider.