Renormalization group effect and a democratic-type neutrino mass matrix

Abstract

In our previous paper, we proposed the democratic-type neutrino mass matrix which gives interesting predictions, ${\theta }_{23}=-\frac{\pi }{4}$, $|\tan {\theta }_{12}|=\sqrt{2-3{\sin }^2{\theta }_{13}}$ and $\delta =\frac{\pi }{2}$, where ${\theta }_{ij}$ is the mixing angle between mass eigenstates ${\nu }_i$ and ${\nu }_j$, and $\delta$ is the CP violation angle in the standard parameterization of mixing matrix. In this paper, we examined how predictions behave at $m_Z$ by assuming that they are given at the right-handed neutrino mass scale, $M_R$.

Comments: LaTeX file,22 pages, 2 postscript figures