Flavor symmetry and vacuum aligned mass textures
Flavor symmetry and vacuum aligned mass textures
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DOI：
10.1143/ptp.117.161
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发表时间：
2006-09
影响因子：
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通讯作者：
S. Kaneko;H. Sawanaka;T. Shingai;M. Tanimoto;K. Yoshioka
中科院分区：
文献类型：
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作者：
S. Kaneko;H. Sawanaka;T. Shingai;M. Tanimoto;K. Yoshioka
用置换味对称性理论研究了夸克和轻子的质量矩阵形式。在弱电偶希格斯场具有非平凡味对称电荷的情况下，分析了标量势的结构。我们发现，质量矩阵的真实形式是在理论的真空中动态获得的，其中一些希格斯场具有消失的期望值，这导致夸克和轻子质量矩阵中的元素消失。大量织构是在真真空中实现的，它们的位置受味道对称性的控制。有趣的是，由于味群结构的原因，真空中上夸克和下夸克的质量矩阵是自动不同的。这导致了不消失的世代混合。文中还讨论了要实现质量不太小的标量，必须打破味道对称性。希格斯质量的下界是从中性K介子混合等味道变化稀有过程的实验数据中得到的。
The mass matrix forms of quarks and leptons are studied in a theory with permutation flavor symmetry. The structure of the scalar potential is analyzed in the case that the electroweak doublet Higgs fields have non-trivial flavor symmetry charges. We find that realistic forms of the mass matrices are obtained dynamically in the vacuum of the theory, where some of the Higgs fields have vanishing expectation values which lead to vanishing elements in the quark and lepton mass matrices. Mass textures are realized in the true vacuum, and their positions are controlled by the flavor symmetry. An interesting point is that, due to the flavor group structure, the up and down quark mass matrices are automatically different in the vacuum. This leads to non-vanishing generation mixing. It is also discussed that it is necessary for the flavor symmetry to be broken to realize scalars whose masses are not too small. The lower bounds of the Higgs masses are derived from the experimental data of flavor-changing rare processes, such as neutral K meson mixing.