Maximal neutrino mixing from a minimal flavor symmetry

Alfredo Aranda, Christopher D. Carone, Richard F. Lebed

Research output: Contribution to journalArticlepeer-review

99 Scopus citations

Abstract

We study a number of models, based on a non-Abelian discrete group, that successfully reproduce the simple and predictive Yukawa textures usually associated with U(2) theories of flavor. These models allow for solutions to the solar and atmospheric neutrino problems that do not require altering successful predictions for the charged fermions or introducing sterile neutrinos. Although Yukawa matrices are hierarchical in the models we consider, the mixing between second- and third-generation neutrinos is naturally large. We first present a quantitative analysis of a minimal model proposed in earlier work, consisting of a global fit to fermion masses and mixing angles, including the most important renormalization group effects. We then propose two new variant models: The first reproduces all important features of the SU(5)xU(2) unified theory with neither SU(5) nor U(2). The second demonstrates that discrete subgroups of SU(2) can be used in constructing viable supersymmetric theories of flavor without scalar universality even though SU(2) by itself cannot.

Original languageEnglish (US)
Article number016009
Pages (from-to)1-18
Number of pages18
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume62
Issue number1
StatePublished - Jul 1 2000
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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