Radiatively Generated Neutrino Masses in SU(3)L x U(1)N Gauge Models
Yutaka Okamoto, Masaki Yasue
Abstract
In SU(3)L x U(1)N gauge models for electroweak interactions, we discuss how to implement a radiative mechanism of generating Majorana neutrino masses by considering the property that the Higgs scalar, which has a coupling to a charged lepton ()-neutrino (ν) pair, is naturally included. The mechanism is shown to work in models with a heavy charged lepton, ω+, in a lepton triplet (ν, , ω+) and with a heavy neutral lepton, N, in (ν, , N). A minimal model with and c in (ν, , c) together with a sextet Higgs scalar suffers from a fine-tuning problem to suppress tree-level neutrino masses.
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