arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2009.05587hep-ph
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最小Froggatt-Nielsen纹理

Minimal Froggatt-Nielsen Textures

Marco Fedele, Alessio Mastroddi, Mauro Valli

摘要:

标准模型的味道问题可以通过Froggatt-Nielsen(FN)机制来解决。在这项工作中,我们开发了一种方法来研究FN纹理建立FN-电荷分配和测量的质量和混合角之间的直接联系,通过酉变换的味道空间。我们特别关注夸克部门,以确定最经济的FN模型,能够提供对味道之谜的动态和自然的理解。值得注意的是,我们发现可行的FN纹理,涉及费用的水平对称性下,不超过一个绝对值(单位的flavon电荷)。在我们的方法中,我们还探讨了FN模型的调整程度,通过一个类似于Barbieri-Giudice的措施来解决味道问题。我们发现,大多数的解决方案不涉及特殊的取消味空间。

英文摘要:

The flavour problem of the Standard Model can be addressed through the Froggatt-Nielsen (FN) mechanism. In this work, we develop an approach to the study of FN textures building a direct link between FN-charge assignments and the measured masses and mixing angles via unitary transformations in flavour space. We specifically focus on the quark sector to identify the most economic FN models able to provide a dynamical and natural understanding of the flavour puzzle. Remarkably, we find viable FN textures, involving charges under the horizontal symmetry that do not exceed one in absolute value (in units of the flavon charge). Within our approach, we also explore the degree of tuning of FN models in solving the flavour problem via a measure analogous to the Barbieri-Giudice one. We find that most of the solutions do not involve peculiar cancellations in flavour space.

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