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arXiv · hep-ph/9710516

Large Lepton Mixing in a Coset-space Family Unification on $E_7/SU(5) \times U(1)^3$

J. Sato·T. Yanagida
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Abstract

We study a coset-space unification model for families based on $E_7/SU(5) \times U(1)^3$. We find that qualitative structure of quark and lepton mass matrices in this model describes very well the observation. We stress, in particular, that the large mixing angle, $\sin^22θ_{ν_μν_τ} \simeq 1$, required for the atmospheric neutrino oscillation reported by the SuperKamiokande collaboration, is naturally obtained, which is a consequence of unparallel family structure in the present coset-space unification.

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J. Sato, T. Yanagida. 1997-10-29. Large Lepton Mixing in a Coset-space Family Unification on $E_7/SU(5) \times U(1)^3$. https://doi.org/10.1016/s0370-2693(98)00510-3

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