Abstract
We propose a left-right symmetric electroweak extension of the Standard Model based on the Δ (27) family symmetry. The masses of all electrically charged Standard Model fermions lighter than the top quark are induced by a Universal Seesaw mechanism mediated by exotic fermions. The top quark is the only Standard Model fermion to get mass directly from a tree level renormalizable Yukawa interaction, while neutrinos are unique in that they get calculable radiative masses through a low-scale seesaw mechanism. The scheme has generalized μ − τ symmetry and leads to a restricted range of neutrino oscillations parameters, with a nonzero neutrinoless double beta decay amplitude lying at the upper ranges generically associated to normal and inverted neutrino mass ordering.
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Cárcamo Hernández, A.E., Kovalenko, S., Valle, J.W.F. et al. Neutrino predictions from a left-right symmetric flavored extension of the standard model. J. High Energ. Phys. 2019, 65 (2019). https://doi.org/10.1007/JHEP02(2019)065
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DOI: https://doi.org/10.1007/JHEP02(2019)065