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Neutrino predictions from a left-right symmetric flavored extension of the standard model
Journal
Journal of High Energy Physics
ISSN
1029-8479
Date Issued
2019-02-01
Author(s)
Valle, José W.F.
Vaquera-Araujo, C. A.
Abstract
<jats:title>A<jats:sc>bstract</jats:sc>
</jats:title>
<jats:p>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 <jats:italic>μ</jats:italic> − <jats:italic>τ</jats:italic> 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.</jats:p>
</jats:title>
<jats:p>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 <jats:italic>μ</jats:italic> − <jats:italic>τ</jats:italic> 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.</jats:p>
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