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Neutrino physics from a U(2) flavor symmetry

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arxiv hep-ph/9702430 v1 pith:WOA3IPZE submitted 1997-02-28 hep-ph

Neutrino physics from a U(2) flavor symmetry

classification hep-ph
keywords neutrinoflavormodelschargedleptonsmixingphysicssymmetry
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider the neutrino physics of models with a sequentially broken U(2) flavor symmetry. Such theories yield the observed pattern of quark and lepton masses, while maintaining sufficient degeneracies between superparticles of the first two generations to solve the supersymmetric flavor problem. Neutrino mass ratios and mixing angles in these models may differ significantly from those of the charged leptons, even though the neutrinos and charged leptons transform identically under the flavor group. A wide class of well-motivated U(2) theories yield order one $\nu_\mu - \nu_\tau$ mixing, without a fine-tuning of parameters. These models provide a natural solution to the atmospheric neutrino deficit, and also have distinctive signatures at long-baseline neutrino oscillation experiments.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Maximal Abelian Flavor Symmetries

    hep-ph 2026-06 unverdicted novelty 6.0

    MAFS approximates 15 flavor observables in SU(5) using 5 ε_a parameters and in SO(10) using 3, while requiring large neutrino mixing from quark hierarchies and generating baryon asymmetry via leptogenesis.

  2. Maximal Abelian Flavor Symmetries

    hep-ph 2026-06 unverdicted novelty 6.0

    MAFS describes 15 flavor observables in SU(5) and SO(10) GUTs using 5 or 3 fitted small parameters at factor-of-two accuracy, implying large neutrino mixings and approximate leptogenesis without extra parameters in SU(5).