论文标题
来自风味的天然轴轴模型
Natural axion model from flavour
论文作者
论文摘要
我们探索了两个长期存在的粒子物理问题：强的CP和费米昂质量层次结构问题的共同对称来对称起源。 Peccei - Quinn机制用异常的全局$ u（1）_ {\ rm pq} $对称求解了前者。在这里，我们研究了$ u（1）_ {\ rm pq} $如何同时解释费米昂质量层次结构。我们在四吉格斯 - doublet模型的背景下工作，该模型解释了所有夸克和充电的费米昂群体，即自然，即\订单$ 1 $，Yukawa耦合。此外，该模型的斧子构成可行的暗物质候选者和中微子质量，通过标准I型SEESAW机制合并。模型的简单扩展可以提供狄拉克中微子。
We explore a common symmetrical origin for two long standing problems in particle physics: the strong CP and the fermion mass hierarchy problems. The Peccei--Quinn mechanism solves the former one with an anomalous global $U(1)_{\rm PQ}$ symmetry. Here we investigate how this $U(1)_{\rm PQ}$ could at the same time explain the fermion mass hierarchy. We work in the context of a four-Higgs-doublet model which explains all quark and charged fermion masses with natural, i.e.\ order $1$, Yukawa couplings. Moreover, the axion of the model constitutes a viable dark matter candidate and neutrino masses are incorporated via the standard type-I seesaw mechanism. A simple extension of the model allows for Dirac neutrinos.
