A Two Loop Radiative Neutrino Model

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.

Comments: 16 pages, 5 figures, 2 tables; reference added, typos corrected; the model extended, figures changed, title changed, version accepted for publication in Nuclear Physics B