Large CP Violation, Large Mixings of Neutrinos and Democratic-type Neutrino Mass Matrix

Abstract

We propose a democratic-type neutrino mass matrix based on $Z_3$ symmetry. This mass matrix predicts the CP violation phase, $\delta =\pi /2$, and the mixing angle between the mass eigenstates ${\nu }_2$ and ${\nu }_3$, ${\sin }^2{\theta }_{23}={\cos }^2{\theta }_{23}=1/2$ which is essential for the large atmospheric neutrino mixing, between ${\nu }_{\mu }$ and ${\nu }_{\tau }$. In this model, the large CP violation effect may be expected.

LaTeX, 22pages, corrected some terminologies, reference added

References in corpus (2)

• A Redetermination of the Neutrino Mass-Squared Difference in Tri-Maximal Mixing with Terrestrial Matter Effects
• Measurement of the solar neutrino capture rate by SAGE and implications for neutrino oscillations in vacuum

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