论文标题
两个-U（1）轴模型的故事
A Tale of Two-U(1) Axion Models
论文作者
论文摘要
$ u（1）$全局对称性解决强$ CP $问题可能是QCD和Hidden forth strong Dynamics的多$ u（1）$ symmetries的残余。 Peccei-Quinn $ U（1）$和Dynamilical $ U（1）$均一描述，基于我们对各种混合混合的两-$ U（1）$模型进行分类，以解决强$ CP $和质量问题。我们提出了一种带有不同费米昂分配的驼鹿图方法，以直接读取$ cp $阶段之间的关系，这说明了$ cp $问题如何根据$ cp $阶段之间的取消解决。在两个轴上模型中，我们发现最轻的轴是与红外区域的QCD轴相同，而一个具有$ Z_2 $对称性的轴模模型可增强轴质量光谱。我们的讨论可以扩展到多轴案例。
The $U(1)$ global symmetry to solve the strong $CP$ problem could be the remnant of multi-$U(1)$ symmetries from QCD and hidden strong dynamics. Both Peccei-Quinn $U(1)$ and dynamical $U(1)$ are described uniformly, based on which we classify various mixed two-$U(1)$ models to solve both strong $CP$ and quality problems. We propose a moose diagram method with different fermion assignments to directly read relations between $CP$ phases, which illustrate how strong $CP$ problem is solved in terms of cancellation between $CP$ phases. In two axion models, we find the lightest axion is still same as QCD axion at infrared region, while one axion model with $Z_2$ symmetry enhances the axion mass spectrum. Our discussions can be extended to multi-axion cases.
