Neutrino Masses in the Effective Rank-5 Subgroups of E_6 II: Supersymmetric Case

Details Neutrino Masses in the Effective Rank-5 Subgroups of E_6 II: Supersymmetric Case Neutrino Masses in the Effective Rank-5 Subgroups of E_6 II: Supersymmetric Case

2005-03-09

arxiv.org/abs/hep-ph/0503084v2

Phys.Rev.D71:113002,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 2 figures; typos correted, version to be published in Physical Review D

Scientific paper

10.1103/PhysRevD.71.113002

We present a complete analysis of the neutral fermion sector of supersymmetric E_6-inspired low energy models containing an extra SU(2), concentrating on the Alternate Left-Right and Inert models. We show that the R-parity conserving scenario always exhibits a large Dirac mass for \nu_L with maximal mixing with an isosinglet neutrino, and that R-parity violating scenarios do not change the picture other than allowing further mixing with another isosinglet. In order to recover Standard Model phenomenology, additional assumptions in the form of discrete symmetries and/or new interactions are needed. We introduce and investigate Discrete Symmetry method and Higher Dimensional Operators as mechanisms for solving the neutrino mass and mixing problems in these models.

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