Small Neutrino Masses From Structural cancellation In Left-Right Symmetric Model

Details Small Neutrino Masses From Structural cancellation In Left-Right Symmetric Model Small Neutrino Masses From Structural cancellation In Left-Right Symmetric Model

2008-12-18

arxiv.org/abs/0812.3453v1

JHEP 0812:061,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTeX 10 pages, no figures

Scientific paper

10.1088/1126-6708/2008/12/061

The Type I, II and hybrid (I+II) seesaw mechanism, which explain why neutrinos are especially light, are consequences of the left-right symmetric model (LRSM). They can be classified by the ranges of parameters of LRSM. We show that a nearly cancellation in general Type-(I+II) seesaw is more natural than other types of seesaw in the LRSM if we consider their stability against radiative correction. In this scenario the small neutrino masses are due to the structure cancellation, and the masses of the right handed neutrino can be of order of O(10)TeV. The realistic model for non-zero neutrino masses, charged lepton masses and lepton tribimaximal mixing can be implemented by embedding $A_4$ flavor symmetry in the model with perturbations to the textures.

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