强子物理在线论坛 Hadron Physics Online Forum (HAPOF)
第五十届HAPOF论坛，： Lattice QCD Determination of the Nonperturbative Collins-Soper Kernel at Next-to-Leading-Order，张其安 副教授，2022 年6月10日
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Asia/Shanghai
Description
报告人：张其安 副教授 (北京航空航天大学) 报告时间：2022年06月10日 15：00 - 16：30 (Beijing time) 摘要： Transverse-momentum-dependent parton distribution functions (TMDPDFs) are a natural generalization of the collinear parton distributions. These non-perturbative functions describe the transverse momentum qT of the partonic constituents of hadrons, and can be accessed directly in high-energy scattering processes such as Drell-Yan or SIDIS with small qT. The momentum dependence of TMDPDFs can be described by Collin-Soper kernel, which governs the rapidity evolution of TMD distributions, known as the rapidity anomalous dimension. In this talk, I will give a brief introduction of our latest progress on the nonperturbative determination of Collins-Soper kernel. In the framework of large-momentum effective theory at one-loop matching accuracy, we extracted Collins-Soper kernel from pion quasi TMD wave functions at transverse momentum scales in about 0.6~3 GeV with a larger-than-physical pion mass. We carefully studied the systematic uncertainties from operator mixing and scale dependence, as well as the impact from higher power corrections. Our results potentially allow for a determination of the soft function and other transverse-momentum dependent quantities at one-loop accuracy. 报告人简介： 张其安副教授，2019年博士毕业于中国科学院高能物理研究所，2019年至2021年在上海交通大学李政道研究所做博士后，现任教于 北京航空航天大学物理学院。格点合作组Lattice Parton Collaboration (LPC) 成员。主要从事强子结构的格点QCD研究， 包括核子部分子分布函数、介子光锥分布振幅，及横向动量依赖的部分子分布与波函数等，兼涉猎重味强子弱衰变的格点QCD与唯象 学研究。曾主持“博士后创新人才支持计划”，国家自然科学基金青年基金项目等。