Nonzero θ13 and CP violation from Broken µ − τ Symmetry

Nonzero and relatively large of θ 13 mixing angle has some phenomenological consequences on neutrino physics beyond the standard model.One of the consequences if the mixing angle θ 13 = 0 is the possibility of the CP violation on the neutrino sector.In order to obtain nonzero θ 13 mixing angle, we break the neutrino mass matrix that obey µ-τ symmetry by introducing a complex parameter and determine the Jarlskog invariant as a measure of CP violation existence.By using the experimental data as input, we determine the Dirac phase δ as function of mixing angle θ 13 .