Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-06-09
Nucl.Phys. B643 (2002) 247-279
Physics
High Energy Physics
High Energy Physics - Phenomenology
41 pages, 4 figures, Elsevier LaTeX. Final version to be published in Nucl. Phys. B
Scientific paper
10.1016/S0550-3213(02)00689-2
We present a model for leptonic mixing and the lepton masses based on flavor symmetries and higher-dimensional mass operators. The model predicts bilarge leptonic mixing (i.e., the mixing angles theta_{12} and theta_{23} are large and the mixing angle theta_{13} is small) and an inverted hierarchical neutrino mass spectrum. Furthermore, it approximately yields the experimental hierarchical mass spectrum of the charged leptons. The obtained values for the leptonic mixing parameters and the neutrino mass squared differences are all in agreement with atmospheric neutrino data, the Mikheyev--Smirnov--Wolfenstein large mixing angle solution of the solar neutrino problem, and consistent with the upper bound on the reactor mixing angle. Thus, we have a large, but not close to maximal, solar mixing angle theta_{12}, a nearly maximal atmospheric mixing angle theta_{23}, and a small reactor mixing angle theta_{13}. In addition, the model predicts theta_{12} ~= pi/4 - theta_{13}.
Ohlsson Tommy
Seidl Gerhart
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