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In the supersymmetric seesaw model of neutrino masses, augmented by thenon-Abelian discrete tetrahedral symmetry A_4, a specific pattern of neutrinomixing is automatically generated if one of the three heavy singlet neutrinosuperfields acquires a nonzero vacuum expectation value. This pattern turns outto be exactly that of tribimaximal mixing, i.e. sin^2 theta_23 = 1/2, sin^2theta_12 = 1/3, and sin^2 theta_13 = 0, in good agreement with data.Comment: published version; title changed in journa

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Tribimaximal neutrino mixing from a supersymmetric model with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>A</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>family symmetry

Tribimaximal neutrino mixing from a supersymmetric model withA4family symmetry