Two-loop Radiative Corrections to Neutrino Masses in SU(3)_L×U(1)_N Gauge Models

抄録

We have constructed two SU(3)_L×U(1)_N gauge models with the L' = L_e - L_μ - L_τ symmetry, which accommodate tiny neutrino masses generated by one-loop and two-loop radiative effects. The heavy neutral leptons and heavy charged leptons are employed to specify the lepton triplets in SU(3)_L, respectively, accompanied by (φ^0, φ^-, h^+) and (φ^+,φ^0, h^+), where φ stands for the standard Higgs scalar and h^+ is a key ingredient for radiative mechanisms. From our numerical calculations, we find that both our models are relevant to yield the VO solution to the solar neutrino problem.