Minimal extension of tribimaximal mixing and generalized Z(2) x Z(2) symmetries

作者：Gupta Shivani^*; Joshipura Anjan S; Patel Ketan M

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2012, 85(3): 031903.

DOI：10.1103/PhysRevD.85.031903

We discuss consequences of combining the effective Z(2) x Z(2) symmetry of the tribimaximal neutrino mass matrix with the CP symmetry. Imposition of such generalized Z(2) x Z(2) symmetries leads to predictive neutrino mass matrices determined in terms of only four parameters and leads to a nonzero theta(13) and maximal atmospheric mixing angle and CP violating phase. It is shown that an effective generalized Z(2) x Z(2) symmetry of the mass matrix can arise from the A(4) symmetry with specific vacuum alignment. The neutrino mass matrix in the considered model has only three real parameters and leads to determination of the absolute neutrino mass scale as a function of the reactor angle theta(13).

• 出版日期2012-2-21