Effects of virtual Majorana neutrinos on charged lepton flavor violation decays from a seesaw variant with radiatively induced light neutrino masses

Lepton flavor violating decays ℓ α → ℓ β γ, being forbidden in the Standard Model framework, provide a sensitive probe for new physics. We study these processes in a seesaw variant in which small neutrino masses are generated radiatively. By analyzing the parameter space constrained by electroweak precision data, we investigate the correlation between these decays and non-unitary effects from TeV-scale heavy neutrinos. According to our results, µ → eγ is the most promising channel for new physics searches, with the bound |η µe | ≲ 10 -6 obtained for non-unitary effects in this radiative seesaw variant. Our estimations of BR (µ → eγ), which depends on the mass of the heavy neutrinos, shows that both current and future experimental facilities might be sensitive to these effects.