Minimal modification to tribimaximal mixing
Journal
Physical Review D - Particles, Fields, Gravitation and Cosmology
Journal Volume
84
Journal Issue
5
Date Issued
2011
Author(s)
Abstract
We explore some ways of minimally modifying the neutrino mixing matrix from tribimaximal, characterized by introducing at most one mixing angle and a CP violating phase thus extending our earlier work. One minimal modification, motivated to some extent by group theoretic considerations, is a simple case with the elements Vα2 of the second column in the mixing matrix equal to 1/√3. Modifications by keeping one of the columns or one of the rows unchanged from tribimaximal mixing all belong to the class of minimal modification. Some of the cases have interesting experimentally testable consequences. In particular, the T2K and MINOS collaborations have recently reported indications of a nonzero θ13. For the cases we consider, the new data sharply constrain the CP violating phase angle δ, with δ close to 0 (in some cases) and π disfavored. © 2011 American Physical Society.
Type
journal article