SU(3) gauge family symmetry and prediction for the lepton-flavor mixing and neutrino masses with maximal spontaneous CP violation

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	SU(3) gauge family symmetry and prediction for the lepton-flavor mixing and neutrino masses with maximal spontaneous CP violation
	Wu, YL
刊名	PHYSICS LETTERS B
	2012
卷号	714 期号:2-5 页码:286-294
关键词	DISCRETE SYMMETRY LARGE THETA(13) S-3 SYMMETRY 2-HIGGS-DOUBLET MODEL DEGENERATE NEUTRINOS HORIZONTAL SYMMETRY T-QUARK MATRIX OSCILLATIONS CONSERVATION
ISSN号	0370-2693
通讯作者	Wu, YL (reprint author), Chinese Acad Sci, Inst Theoret Phys, KITPC, SKLTP, Beijing 100190, Peoples R China.
英文摘要	A model for the lepton-flavor mixing and CP violation is proposed based on the SUF(3) gauge family symmetry and the Majorana feature of neutrinos. A consistent prediction for the lepton-flavor mixing and masses is shown to be resulted from the appropriate vacuum structure of SUF(3) gauge symmetry breaking. By choosing the SUF(3) gauge fixing condition to possess a residual Z(2) symmetry and requiring the vacuum structure of spontaneous symmetry breaking to have approximate global U(1) family symmetries, we obtain naturally the tri-bimaximal mixing matrix and largely degenerate neutrino masses in the neutrino sector and the small mixing matrix in the charged-lepton sector. With a simple ansatz that all the smallness due to the approximate global U(1) family symmetries is characterized by a single Wolfenstein parameter lambda similar or equal to 0.22, and the charged-lepton mixing matrix has a similar hierarchy structure as the CKM quark mixing matrix, we arrive at a consistent prediction for the MNSP lepton-flavor mixing with a maximal spontaneous CP violation: delta = pi/2, sin(2) theta(13) similar or equal to 1/2(lambda 2) similar or equal to 0.024 (sin(2) 2 theta(13) similar or equal to 0.094), sin(2) theta(12) similar or equal to 1/3 (1 - 2(lambda 3)) similar or equal to 0.326 and sin(2) theta(23) similar or equal to 1/2(1 - lambda(2)) similar or equal to 0.48, which agree well with the current experimental data. The CP-violating Jarlskog-invariant is obtained to be J(CP) similar or equal to 1/6 lambda(1 - lambda(2)/2 - lambda(3)) sin delta similar or equal to 0.035, which is detectable in next generation neutrino experiment. The small masses of the neutrinos and charged leptons are simply attributed to the standard seesaw mechanism. The largely degenerate neutrino masses with the normal hierarchy and inverse hierarchy are discussed and found to be at the order m(vi) similar or equal to O(lambda(2)) similar or equal to 0.04-0.06 eV with a total mass Sigma m(v) similar to 0.15 eV, which is testable in future precision astrophysics and cosmology. (C) 2012 Published by Elsevier B.V.
学科主题	Physics
收录类别	SCI
资助信息	National Science Foundation of China (NSFC) [10821504, 10975170]; National Basic Research Program of China (973 Program) [2010CB833000]; Chinese Academy of Sciences (CAS)
原文出处	http://dx.doi.org/10.1016/j.physletb.2012.07.020
语种	英语
WOS记录号	WOS:000307680100018
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15048]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Wu, YL. SU(3) gauge family symmetry and prediction for the lepton-flavor mixing and neutrino masses with maximal spontaneous CP violation[J]. PHYSICS LETTERS B,2012,714(2-5):286-294.
APA	Wu, YL.(2012).SU(3) gauge family symmetry and prediction for the lepton-flavor mixing and neutrino masses with maximal spontaneous CP violation.PHYSICS LETTERS B,714(2-5),286-294.
MLA	Wu, YL."SU(3) gauge family symmetry and prediction for the lepton-flavor mixing and neutrino masses with maximal spontaneous CP violation".PHYSICS LETTERS B 714.2-5(2012):286-294.