A shift from democratic to tri-bimaximal neutrino mixing with relatively large θ
Abstract
Recent neutrino oscillation data hint that the smallest neutrino mixing angle θ13 is possible to lie in the range 5°≲θ13≲12°. We show that reasonable perturbations to the democratic mixing pattern, which is geometrically related to the tri-bimaximal mixing pattern through an equal shift θ*≃9.7° of two large mixing angles, can naturally produce a nearly tri-bimaximal neutrino mixing matrix V with sufficiently large θ13. Two especially simple but viable scenarios of V are proposed and their phenomenological consequences are discussed.
- Publication:
-
Physics Letters B
- Pub Date:
- January 2011
- DOI:
- 10.1016/j.physletb.2010.12.031
- arXiv:
- arXiv:1011.2954
- Bibcode:
- 2011PhLB..696..232X
- Keywords:
-
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- 11 pages, 1 figure. Slight modifications. References added. Accepted for publication in PLB