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arXiv 2012.08410hep-ph
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用大统一理论解释SM味结构

Explaining the SM flavor structure with grand unified theories

Renato M. Fonseca

摘要:

我们不知道为什么在标准模型(SM)中有三个费米子族,也不能解释观测到的费米子质量和混合角的模式。基于SU(5)和SO(10)群的标准大统一理论无法解释这个问题,因为它们也包含了一个扩大规范群的费米子表示的三个副本。然而,事实并非如此:标准模型族可能分布在大统一模型的不同表示上,在这种情况下,规范对称性本身可能会区分各个族并解释(至少部分地)味道之谜。这个想法的最雄心勃勃的版本包括将所有SM费米子嵌入规范群的单个不可约表示中。

英文摘要:

We do not know why there are three fermion families in the Standard Model (SM), nor can we explain the observed pattern of fermion masses and mixing angles. Standard grand unified theories based on the SU(5) and SO(10) groups fail to shed light on this issue, since they also contain three copies of fermion representations of an enlarged gauge group. However, it does not need to be so: the Standard Model families might be distributed over distinct representations of a grand unified model, in which case the gauge symmetry itself might discriminate the various families and explain (at least partially) the flavor puzzle. The most ambitious version of this idea consists on embedding all SM fermions in a single irreducible representation of the gauge group.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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