Understand
We study an extension of the standard model based on the flavor symmetry A4 only.
- Neutrino Majorana mass terms arise from dimension five operator and charged lepton masses from renormalizable Yukawa couplings.
- We introduce three Higgs doublets that belong to one triplet irreducible representation of A4.
- We study the most general A4-invariant scalar potential and the phenomenological consequences of the model.
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