Zee-type Neutrino Mass Matrix and Bi-Maximal Mixing

Abstract

It is shown that the bi-maximal solution is the only possibility to reconcile Zee-type neutrino mass matrix with three flavors to the current atmospheric and solar neutrino experimental data. The mass of the lightest neutrino, which consist mostly of $\hat{I}{½}_{\hat{I}}¼$ and $\hat{I}{½}_{\ddot{I}}„$, is $\simeq \hat{I}”m_{\odot }^2/(2\sqrt{\hat{I}”m_{atm}^2})$. The related topics on Zee-type neutrino mass matrix are also discussed.

5 pages, no figure, Talk given by M. Matsuda at Workshop on Neutrino Oscillations and their Origin, Fuji-Yoshida, Japan, 11-13 Feb 2000