CP-conserving SO(3) parameterization of the neutrino mixing matrix

Jarosław Duda, Janusz Gluza, Biswajit Karmakar

The pattern of neutrino mixing, usually parameterized by the Pontecorvo-Maki-Nakagawa-Sakata $U_{\mathrm{PMNS}}$ matrix, still remains a striking puzzle in particle physics. $U_{\rm PMN…