2012/05/03 by Shun Zhou, Zhou, Shun
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.1205.0761
openalex publication_date 2012/05/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Daya Bay Collaboration has recently observed neutrino oscillations in the nue-bar -> nue-bar disappearance channel, indicating that sin2 theta13 = 0.024 +(-) 0.005 (1 sigma) and theta13 = 0 is already excluded at the 5.2 sigma confidence level. Now three neutrino mixing angles have been measured to a good degree of accuracy (theta12 ~ 34^∘, theta23 ~ 45^∘ and theta13 ~ 9^∘). Motivated by these experimental results, we propose a novel lepton flavor mixing pattern, which predicts sin2 theta23 = 1/2, sin2 theta12 = (2+√(3))/(10+√(3)) ~ 0.318 and sin2 theta13 = (2-√(3))/12 ~ 0.022, together with a maximal CP-violating phase delta = 90^∘. The leptonic CP violation characterized by the Jarlskog invariant \cal J = √(6)/72 ~ 3.4 % is promising to be measured in the future long-baseline neutrino oscillation experiments. Furthermore, we point out that a generalized version of mu-tau symmetry may exist in the neutrino sector and can give rise to the aforementioned mixing pattern. The possible realizations in the seesaw models with discrete flavor symmetries are also discussed.