标题： 来自手征规范理论的QCD轴子 显示英文标题

标题： QCD axion from chiral gauge theories

摘要： 我们提出了基于超对称手征规范理论的轴子模型。 在这些模型中，PQ对称性通过手征规范理论的非微扰动力学自发破缺。 由于超对称性，模型的红外动力学是可计算的。 我们还提出一个与SU(5)大统一相容的QCD轴子模型。 我们发现，为了成功的大统一，PQ破缺尺度应高于$\sim 10^{13}~{\rm GeV}$。 此外，PQ破缺尺度应高于大统一尺度，以避免在普朗克尺度以下出现规范耦合的兰道极点。 显示英文摘要

摘要： We present models of axion based on supersymmetric chiral gauge theories. In these models, the PQ symmetry is spontaneously broken by the non-perturbative dynamics of chiral gauge theory. Thanks to supersymmetry, IR dynamics of the models are calculable. We also present an example of a QCD axion model that is compatible with SU(5) grand unification. We find that the PQ breaking scale should be higher than $\sim 10^{13}~{\rm GeV}$ for the successful GUT unification. In addition, the PQ breaking scale should be higher than the GUT scale to avoid a Landau pole of gauge coupling below the Planck scale.