King, S.F. and Malinsky, M.
A(4) family symmetry and quark-lepton unification.
Physics Letters B, 645, (4), . (doi:10.1016/j.physletb.2006.12.006).
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We present a model of quark and lepton masses and mixings based on A4 family symmetry, a discrete subgroup of an SO(3) flavour symmetry, together with Pati–Salam unification. It accommodates tri-bimaximal neutrino mixing via constrained sequential dominance with a particularly simple vacuum alignment mechanism emerging through the effective D-term contributions to the scalar potential.
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