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

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

1997-10-29

arxiv.org/abs/hep-ph/9710516v1

Phys.Lett. B430 (1998) 127-131

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, Latex2e

Scientific paper

10.1016/S0370-2693(98)00510-3

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, $\sin^22\theta_{\nu_\mu\nu_\tau} \simeq 1$, 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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