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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0711.0670hep-ph
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夸克质量矩阵的A_4模型

A_4 model for the quark mass matrices

L. Lavoura, H. Kuhbock

摘要:

我们提出了一个基于A_4族对称性的夸克质量和混合模型。三个纯量SU(2)二重态构成A_4的三重态。三个左手夸克SU(2)二重态也统一为A_4三重态。右手夸克是A_4的单线态。A_4对称标量势导致真空,在真空中,三个标量SU(2)偶态中的两个具有模相等的期望值。我们的模型与观察到的|V_ub/V_cb|.在夸克的荷电规范相互作用中,CP对称性受到尊重。

英文摘要:

We propose a model for the quark masses and mixings based on an A_4 family symmetry. Three scalar SU(2) doublets form a triplet of A_4. The three left-handed-quark SU(2) doublets are also united in a triplet of A_4. The right-handed quarks are singlets of A_4. The A_4-symmetric scalar potential leads to a vacuum in which two of the three scalar SU(2) doublets have expectation values with equal moduli. Our model makes an excellent fit of the observed |V_ub/V_cb|. The symmetry CP is respected in the charged gauge interactions of the quarks.

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