论文标题
QCD中强CP问题的动态解决方案？
Dynamical solution of the strong CP problem within QCD ?
论文作者
论文摘要
强大的CP问题与量规场的拓扑和颜色限制机理密不可分，这需要非扰动工具来解决它。在本次演讲中，我介绍了最近对QCD的晶格调查，并与yoshifumi nakamura合作进行了$θ$项。我们用来解决理论非扰动特性的工具是梯度流，这是动量空间RG变换的特殊实现。新颖的结果是，在QCD中，真空角$θ$与强耦合常数一起重新归一化，并在红外限制中流到$θ= 0 $。这意味着CP是通过强相互作用保存的。
The strong CP problem is inseparably connected with the topology of gauge fields and the mechanism of color confinement, which requires nonperturbative tools to solve it. In this talk I present results of a recent lattice investigation of QCD with the $θ$ term in collaboration with Yoshifumi Nakamura. The tool we are using to address the nonperturbative properties of the theory is the gradient flow, which is a particular realization of momentum space RG transformations. The novel result is that within QCD the vacuum angle $θ$ is renormalized, together with the strong coupling constant, and flows to $θ= 0$ in the infrared limit. This means that CP is conserved by the strong interactions.
