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
刊名PHYSICS LETTERS B
2010
卷号690期号:3页码:304-310
关键词Flavor symmetry Fermion masses Flavor mixing
学科分类Physics
DOI10.1016/j.physletb.2010.05.045
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
文章类型Article
英文摘要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.
类目[WOS]Physics, Multidisciplinary
研究领域[WOS]Physics
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语种英语
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
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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GB/T 7714
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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