Determining the Dirac CP Violation Phase in the Neutrino Mixing Matrix from Sum Rules

I. Girardi, S. T. Petcov, A. V. Titov

Using the fact that the neutrino mixing matrix $U=U_e^{†}{U}_{\nu }$, where $U_e$ and $U_{\nu }$ result from the diagonalisation of the charged lepton and neutrino mass matrices, we…