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Broken S-3 flavor symmetry of leptons and quarks: Mass spectra and flavor mixing patterns
Xing ZZ(邢志忠); Xing, ZZ; Yang, DS; Zhou, S
2010
发表期刊PHYSICS LETTERS B
卷号690期号:3页码:304-310
通讯作者[Zhou, Shun] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst Phys, D-80805 Munich, Germany ; [Xing, Zhi-zhong] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Yang, Deshan] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
摘要We apply the discrete S-3 flavor symmetry to both lepton and quark sectors of the Standard Model extended by introducing one Higgs triplet and realizing the type-II seesaw mechanism for finite neutrino masses. The resultant mass matrices of charged leptons (M-l), neutrinos (M-v), up-type quarks (M-u) and down-type quarks (M-d) have a universal form consisting of two terms: one is proportional to the identity matrix 1 and the other is proportional to the democracy matrix D. We argue that the textures of M-l, M-u and Md are dominated by the D term, while that of M is dominated by the I term. This hypothesis implies a near mass degeneracy of three neutrinos and can naturally explain why the mass matrices of charged fermions are strongly hierarchical, why the quark mixing matrix is close to I and why the lepton mixing matrix contains two large angles. We discuss a rather simple perturbation ansatz to break the S-3 symmetry and obtain more realistic mass spectra of leptons and quarks as well as their flavor mixing patterns. We stress that the I term, which used to be ignored from M-l, M-u and M-d, is actually important because it can significantly modify the smallest lepton flavor mixing angle theta(13) or three quark flavor mixing angles. (c) 2010 Elsevier B.V. All rights reserved.
文章类型Article
关键词Flavor symmetry Fermion masses Flavor mixing
学科领域Physics
DOI10.1016/j.physletb.2010.05.045
研究领域[WOS]Physics
URL查看原文
语种英语
WOS类目Physics, Multidisciplinary
WOS记录号WOS:000279388800017
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被引频次:43[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/236881
专题理论物理室
作者单位中国科学院高能物理研究所
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Xing ZZ,Xing, ZZ,Yang, DS,et al. Broken S-3 flavor symmetry of leptons and quarks: Mass spectra and flavor mixing patterns[J]. PHYSICS LETTERS B,2010,690(3):304-310.
APA 邢志忠,Xing, ZZ,Yang, DS,&Zhou, S.(2010).Broken S-3 flavor symmetry of leptons and quarks: Mass spectra and flavor mixing patterns.PHYSICS LETTERS B,690(3),304-310.
MLA 邢志忠,et al."Broken S-3 flavor symmetry of leptons and quarks: Mass spectra and flavor mixing patterns".PHYSICS LETTERS B 690.3(2010):304-310.
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