Fermion Masses and Proton Decay in String-Inspired SU(4)×SU(2)2×U(1)X

Details Fermion Masses and Proton Decay in String-Inspired SU(4)×SU(2)2×U(1)X Fermion Masses and Proton Decay in String-Inspired SU(4)×SU(2)2×U(1)X

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pasc.conf..448d&link_type=abstract

PASCOS 2004 Part I: Particles, Strings and Cosmology* Part II: Themes in Unification -- The Pran Nath Festschrift†. *,†Proceedin

Physics

Scientific paper

We present a supersymmetric SU(4)×SU(2)2 × U(1)X model of fermion masses with fundamental and antisymmetric tensor representations only. The up, down, charged lepton and neutrino Yukawa matrices are split by SU(4) and SU(2)R Clebsch-Gordan coefficients. We obtain a hierarchical light neutrino mass spectrum with bi-large mixing. The condition that anomalies be cancelled by a Green-Schwarz mechanism consistent with gauge unification leads to fractional U(1)X charges, which exclude B violation through dimension-4 and -5 operators.

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