Dependence of Neutrino Mixing Angles and CP-violating Phase on Mixing   Matrix Parametrizations
  We consider various neutrino mixing matrix parametrizations and the dependence of the mixing angles and CP-violating phase on the different parametrizations. The transformations of neutrino mixing parameters between various parametrizations are presented. Although the $\theta_{13}$ mixing angle is determined to be small in the conventional parametrization, we note that in several other parametrizations the values of $\theta_{13}$ are quite large. Should the value of $\theta_{13}$ turn out to be tiny in the conventional parametrization, this study suggests that other alternative mixing matrix representations would be more suitable for dertermining the value of the CP-violating phase. 
Melin Huang, Dawei Liu, Jen-Chieh Peng, S. D. Reitzner, and Wei-Chun   Tsai
hep-ph hep-ex