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arXiv 1609.09491hep-ph
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更多关于夸克质量矩阵中的非物理零点

More about unphysical zeroes in quark mass matrices

David Emmanuel-Costa, Ricardo Gonzalez Felipe

摘要:

我们寻找所有的弱基,导致纹理零的夸克质量矩阵,并包含最小数量的参数在标准模型的框架。由于有10个物理观测量,即6个非零夸克质量,3个混合角和一个CP相位,在两个夸克扇区的纹理零的最大数量是总共9个。九个零元素只能分布在上夸克和下夸克扇区之间的矩阵对中,具有六个和三个纹理零或五个和四个纹理零。在弱基中,夸克质量矩阵是非奇异的,在一个部门有六个零,我们发现有54个矩阵有三个零的其他部门,通过右手弱基变换。我们还发现,所有由一个非奇异的五个零的矩阵和一个非奇异的和非解耦的四个零的矩阵组成的对仅仅对应于一个弱基选择。在没有任何进一步假设的情况下,这些上夸克和下夸克质量矩阵对都没有物理内容。它表明,所有的夸克质量矩阵的非弱基对,包含9个零是不兼容的,目前的实验数据。还讨论了所谓的最近邻相互作用模式的特殊情况。

英文摘要:

We look for all weak bases that lead to texture zeroes in the quark mass matrices and contain a minimal number of parameters in the framework of the standard model. Since there are ten physical observables, namely, six nonvanishing quark masses, three mixing angles and one CP phase, the maximum number of texture zeroes in both quark sectors is altogether nine. The nine zero entries can only be distributed between the up- and down-quark sectors in matrix pairs with six and three texture zeroes or five and four texture zeroes. In the weak basis where a quark mass matrix is nonsingular and has six zeroes in one sector, we find that there are 54 matrices with three zeroes in the other sector, obtainable through right-handed weak basis transformations. It is also found that all pairs composed of a nonsingular matrix with five zeroes and a nonsingular and nondecoupled matrix with four zeroes simply correspond to a weak basis choice. Without any further assumptions, none of these pairs of up- and down-quark mass matrices has physical content. It is shown that all non-weak-basis pairs of quark mass matrices that contain nine zeroes are not compatible with current experimental data. The particular case of the so-called nearest-neighbour-interaction pattern is also discussed.

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