Speaker
Description
Neutrino oscillation experiments establish that neutrinos have nonzero but very small masses, which is beyond the scope of Standard Model of particle physics. Radiative neutrino mass models address this by generating neutrino masses at the loop level, naturally suppressing their scale. By considering the scotogenic model, this study established a framework for the minimal mass of neutrinos at the one-loop level. The framework includes generic Yukawa couplings, heavy fermion masses, and scalar mass splittings to construct the Majorana neutrino mass matrix, which is then diagonalized to obtain neutrino mass eigenvalues and a Pontecorvo–Maki–Nakagawa–Sakata like mixing matrix. This setup provides a clear and flexible method to study neutrino mass generation and related phenomenology. By imposing a discrete $Z_2$ symmetry, the framework can be extended to ensure the stability of the lightest $Z_2$ -odd particle, making it a viable dark matter candidate. The dependence of neutrino masses and mixing parameters on model inputs such as Yukawa couplings and heavy fermion masses can be systematically studied.