Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-09-18
Phys.Rev. D69 (2004) 033003
Physics
High Energy Physics
High Energy Physics - Phenomenology
36 pages, 8 figures
Scientific paper
10.1103/PhysRevD.69.033003
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 $\sim 10^{12}{\rm GeV}$). The model also predicts Majorana masses between $\sim 10^{-2}{\rm eV}$ and $\sim 5 \ 10^{-2}{\rm eV}$ 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 $\beta$ decay experiments. The preferred range for leptonic mixing angle $\theta_{13}$ is: $10^{-2} \lesssim \sin \theta_{13} \lesssim 10^{-1}$, but smaller values are not totally excluded by the model.
Frere Jean-Marie
Moreau Gauthier
Nezri Emmanuel
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