A Two Loop Radiative Neutrino Model

TL;DR

This paper proposes a two-loop radiative neutrino mass model incorporating a bosonic dark matter candidate, utilizing a Zee-Babu type scenario with a Z3 symmetry to explain neutrino oscillations and dark matter constraints.

Contribution

It introduces a novel two-loop neutrino mass generation mechanism with a gauge singlet dark matter candidate within a Zee-Babu type framework, considering various experimental constraints.

Findings

Neutrino mass matrix generated at two-loop level.

Compatibility with neutrino oscillation data and dark matter constraints.

Predictions for lepton flavor violation and muon g-2.

Abstract

We explore the possibility to explain a bosonic dark matter candidate with a gauge singlet inside the loop to generate the neutrino mass matrix at two-loop level. The mass matrix is suppressed by a small mixing that comes from the bound on {direct detection experiments of the dark matter, and equivalent of the three-loop neutrino model due to the small mixing between neutral inert bosons. Here, our setup is} the Zee-Babu type scenario with $Z_3$ discrete symmetry, in which we consider the neutrino oscillation data, lepton flavor violations, muon $g-2$, $\mu-e$ conversion rate, lepton flavor-changing and conserving $Z$ boson decay and bosonic dark matter candidate.