Neutrino Mass Matrix from S_4 Symmetry

Details Neutrino Mass Matrix from S_4 Symmetry Neutrino Mass Matrix from S_4 Symmetry

2005-08-22

arxiv.org/abs/hep-ph/0508231v2

Phys.Lett. B632 (2006) 352-356

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, no figure

Scientific paper

10.1016/j.physletb.2005.10.019

The cubic symmetry S_4 contains A_4 and S_3, both of which have been used to study neutrino mass matrices. Using S_4 as the family symmetry of a complete supersymmetric theory of leptons, it is shown how the requirement of breaking S_4 at the seesaw scale without breaking supersymmetry enforces a special form of the neutrino mass matrix which exhibits maximal nu_mu - nu_tau mixing as well as zero U_e3. In addition, (nu_e + nu_mu + nu_tau)/sqrt{3} is naturally close to being a mass eignestate, thus predicting tan^2 theta_12 to be near but not equal to 1/2.

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