An improved supersymmetric SU(5)

1999/04/30 by Qaisar Shafi, Zurab Tavartkiladze · 3 citations
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0370-2693(99)00696-6

published as Phys.Lett.B459:563-569,1999 · 11 pp. LATEX. Version with minor addition accepted for publication in Physics Letters B

arxiv created 1999/06/02 · openalex publication_date 1999/07/01 · arxiv updated 2011/05/12 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

By supplementing minimal supersymmetric SU(5) (MSSU(5)) with a flavor \cal U(1) symmetry and two pairs of 15+15 `matter' supermultiplets, we present an improved model which explains the charged fermion mass hierarchies and the magnitudes of the CKM matrix elements, while avoiding the undesirable asymptotic mass relations m<sub>s</sub>=m<sub>μ</sub>, m<sub>d</sub>/m<sub>s</sub> = m<sub>e</sub>/m<sub>μ</sub>. The strong coupling α<sub>s</sub> (M<sub>Z</sub>) is predicted to be approximately 0.115, and the proton lifetime is estimated to be about five times larger than the MSSU(5) value. The atmospheric and solar neutrino puzzles are respectively resolved via maximal ν<sub>μ</sub>-ν<sub>τ</sub> and small mixing angle ν<sub>e</sub>-ν<sub>s</sub> MSW oscillations, where ν<sub>s</sub> denotes a sterile neutrino. The \cal U(1) symmetry ensures not only a light ν<sub>s</sub> but also automatic `matter' parity.

Citations

• Models of light singlet fermion and neutrino phenomenology
• Suppression of Proton Decay in the Missing-Partner Model for Supersymmetric SU(5) GUT

Cited by

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• Non-Abelian horizontal symmetry and anomalous U(1) symmetry for the supersymmetric flavor problem
• Neutrino democracy and other phenomenology from 5D SO(10)