标题： 从格点QCD确定Collins-Soper核 显示英文标题

标题： Determination of the Collins-Soper kernel from Lattice QCD

摘要： 本文利用格点量子色动力学（QCD）确定了夸克Collins-Soper核，该核将不同快速度标度下的部分子分布函数（TMDs）联系起来。 这是首次以系统控制夸克质量、算符混合和离散化效应的方式进行此类确定。 使用次次领头对数匹配来将可从格点计算的分布与相应的TMDs匹配。 经过连续极限外推后的格点QCD结果与几个近期的经验参数化结果一致，并且其精度足以排除其他参数化。 显示英文摘要

摘要： This work presents a determination of the quark Collins-Soper kernel, which relates transverse-momentum-dependent parton distributions (TMDs) at different rapidity scales, using lattice quantum chromodynamics (QCD). This is the first such determination with systematic control of quark mass, operator mixing, and discretization effects. Next-to-next-to-leading logarithmic matching is used to match lattice-calculable distributions to the corresponding TMDs. The continuum-extrapolated lattice QCD results are consistent with several recent phenomenological parameterizations of the Collins-Soper kernel and are precise enough to disfavor other parameterizations.