Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-08-17
Phys.Lett. B601 (2004) 176-183
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTex 12 pages (2 figures included). More discussions added. Accepted for publication in PLB
Scientific paper
10.1016/j.physletb.2004.09.061
We generalize the democratic neutrino mixing Ansatz by incorporating the type-II seesaw mechanism with S(3) flavor symmetry. We find that bilarge neutrino mixing can naturally appear if the flavor democracy contribution is strongly suppressed due to significant cancellation between the conventional seesaw and triplet mass terms. Explicit S(3) symmetry breaking yields successful neutrino phenomenology and various testable correlations between the neutrino mass and mixing parameters. Among the results are a normal neutrino mass ordering, $0.005 \le |U_{e3}| \le 0.057$, $1 - \sin^2 2\theta_{23} \ge 0.005$, positive $J_{\rm CP}$ and moderate cancellation in the effective mass of the neutrinoless double beta decay.
Rodejohann Werner
Xing Zhi-zhong
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