Intrinsic deviation from the tri-bimaximal neutrino mixing in a class of A4 flavor models

被引：15

作者：

Araki, Takeshi ^{[1
]}

Mei, Jianwei ^{[2
]}

Xing, Zhi-zhong ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Albert Einstein Inst, Max Planck Inst Gravitat Phys, Golm, Germany

来源：

PHYSICS LETTERS B | 2011年 / 695卷 / 1-4期

基金：

中国国家自然科学基金;

关键词：

Tri-bimaximal neutrino mixing; A(4) models; Non-unitarity; CP-VIOLATION; MASS; SYMMETRY;

D O I：

10.1016/j.physletb.2010.10.061

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is well known that the tri-bimaximal neutrino mixing pattern V-0 can be derived from a class of flavor models with the non-Abelian A(4) symmetry. We point out that small corrections to V-0, which are inherent in the A(4) models and arise from both the charged-lepton and neutrino sectors, have been omitted in the previous works. We show that such corrections may lead the 3 x 3 neutrino mixing matrix V to a non-unitary deviation from V-0, but they cannot result in a nonzero value of theta(13) or any new CF-violating phases. Current experimental constraints on the unitarity of V allow us to constrain the model parameters to some extent. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：165 / 168

页数：4