Nonzero θ13 and CP violation from broken μ - τ symmetry

Nonzero and relatively large of theta(13) mixing angle has some phenomenological consequences on neutrino physics beyond the standard model. One of the consequences if the mixing angle theta(13) not equal 0 is the possibility of the CP violation on the neutrino sector. In order to obtain nonzero theta(13) mixing angle, we break the neutrino mass matrix that obey mu - tau symmetry by introducing a complex parameter and determine the Jarlskog invariant as a measure of CP violation existence. By using the experimental data theta(12) and theta(23) as input, we can determine the Dirac phase delta as function of mixing angle theta(13).