====== TTP98-26 Neutrino mixing and seesaw mechanism ======
 
 
   <hidden TTP98-26  Neutrino mixing and seesaw mechanism > Models of neutrino masses are discussed capable of explaining
 in a natural way the maximal mixing between $\nu_{\mu}$ and
 $\nu_{\tau}$ observed by the Super-Kamiokande collaboration. 
 For three generations of leptons two 
 classes of such models are found implying: 
 a) $\Delta {m_{23}}^2 \ll \Delta {m_{12}}^2 \approx \Delta {m_{13}}^2 $
 and a small mixing between $\nu_{e}$ and the other two neutrinos,
 b) $\Delta {m_{12}}^2 \ll \Delta {m_{13}}^2 \approx \Delta {m_{23}}^2$
 and a nearly maximal mixing for solar neutrino oscillations in vacuum.
 </hidden>
|**M. Jezabek and Y. Sumino**  | 
|** Phys. Lett. B440 327-331 1998  **  |
| {{preprints:1998:ttp98-26.pdf|PDF}} {{preprints:1998:ttp98-26.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9807310|arXiv]]   |
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