Neutrino Mass Patterns within the See-saw Model from Multi-localization along Extra Dimensions

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We study a multi-localization model for charged leptons and neutrinos, including the possibility of a see-saw mechanism. This framework offers the opportunity to allow for realistic solutions in a consistent model without fine-tuning of parameters, even if quarks are also considered. Those solutions predict that the large Majorana mass eigenvalues for right-handed neutrinos are of the same order of magnitude, although this almost common mass can span a large range (bounded from above by 10¹² GeV). The model also predicts Majorana masses between 10⁻² eV and 5 10⁻² eV for the left-handed neutrinos, both in the normal and inverted mass hierarchy cases. This mass interval corresponds to sensitivities which are reachable by proposed neutrinoless double β decay experiments. The preferred range for leptonic mixing angle θ₁₃ is: 10⁻² θ₁₃ 10⁻¹, but smaller values are not totally excluded by the model.