论文标题
强大的CP问题，电偶极力矩和轴上的命运
Strong CP problem, electric dipole moment, and fate of the axion
论文作者
论文摘要
三个严重问题！在这次演讲中，我研究了在拓扑结构术语的情况下，量子染色体动力学的长距离特性。这是在晶格上完成的，使用梯度流以隔离功能积分度量中的长距离模式，并在连续的长度尺度上追踪它。事实证明，筛选了夸克和胶子产生的颜色场，对于真空角> 0而丢失了限制，从而提供了强大的CP问题的自然解决方案。该解决方案与中子的电偶极矩的最新晶格计算兼容，而它排除了标准模型的轴突延伸。
Three hard problems! In this talk I investigate the long-distance properties of quantum chromodynamics in the presence of a topological theta term. This is done on the lattice, using the gradient flow to isolate the long-distance modes in the functional integral measure and tracing it over successive length scales. It turns out that the color fields produced by quarks and gluons are screened, and confinement is lost, for vacuum angles theta > 0, thus providing a natural solution of the strong CP problem. This solution is compatible with recent lattice calculations of the electric dipole moment of the neutron, while it excludes the axion extension of the Standard Model.
