论文标题
斧头连接
The axion flavour connection
论文作者
论文摘要
作用在标准模型夸克上的本地风味对称性会自动产生意外的全局$ u（1）$，该$从显式分解到大型操作员尺寸的来源中保存下来，而它与风味对称性一起自发地破裂。这种非基本对称性通常被赋予混合QCD异常，因此强大的CP问题通过轴突机制自动解决。我们说明了实现这种情况所需的一般特征，并讨论了一个基于风味组$ su（3）\ times su（2）\ times u（1）_f $的简单结构，以说明如何出现质量层次结构，同时确保高质量的PECCEI-PECCEI-PECCEI-QUINN对称性。
A local flavour symmetry acting on the quarks of the Standard Model can automatically give rise to an accidental global $U(1)$ which remains preserved from sources of explicit breaking up to a large operator dimension, while it gets spontaneously broken together with the flavour symmetry. Such non-fundamental symmetries are often endowed with a mixed QCD anomaly, so that the strong CP problem is automatically solved via the axion mechanism. We illustrate the general features required to realise this scenario, and we discuss a simple construction based on the flavour group $SU(3)\times SU(2) \times U(1)_F$ to illustrate how mass hierarchies can arise while ensuring at the same time a high quality Peccei-Quinn symmetry.
