Year: 2011
Type: article
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 ${V}_{\ensuremath{\alpha}2}$ of the second column in the mixing matrix equal to $1/\sqrt{3}$. 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 ${\ensuremath{\theta}}_{13}$. For the cases we consider, the new data sharply constrain the $CP$ violating phase angle $\ensuremath{\delta}$, with $\ensuremath{\delta}$ close to 0 (in some cases) and $\ensuremath{\pi}$ disfavored.
Authors: Xiao-Gang He, A. Zee
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funder: National Science Foundation
OpenAlex ID: W2104279239