横动量依赖的部分子分布函数的唯象学研究

Transverse momentum dependent (TMD) parton distribution functions are hot spots of the study on nucleon structure. They encoded information of the intrinsic transverse momentum distribution, spin-momentum correlation, etc of quarks and gluons inside the nucleon. Currently for leading twist TMD quark distribution functions there are already 1st phase parameterisation and quantitive study on their QCD evolution, but deeper study involve TMD gluon distribution functions and higher twist parton correlation functions. This project focus on the phenomenological study of leading twist TMD gluon distribution functions and higher twist TMD parton correlation functions and their nuclear dependences. The applicant and the team will employ light-cone wave function, MIT bag model, etc to calculate the leading twist TMD gluon distribution functions, extract the parameterisation of higher twist parton correlation functions from the most recent data from Hermes, COMPASS, Jlab, etc, and study the effects of nuclei on TMD parton distribution functions for the case when A is finite.

横动量依赖的（TMD）部分子分布函数是当前核子结构研究的热点，包含核子内部夸克和胶子的内禀横动量分布、自旋动量关联等重要信息。当前，领头扭度TMD夸克分布函数已经有初步的参数化结果和QCD演化的定量研究，但更深入的研究需要考虑TMD胶子分布函数和高扭度TMD部分子关联函数。本项目集中于领头扭度TMD胶子分布函数和高扭度TMD部分子关联函数的唯象学研究以及它们的核依赖性。申请人及其团队将利用光锥波函数、MIT袋模型等计算领头扭度TMD胶子分布函数，从Hermes、COMPASS、Jlab等实验的最新数据中抽取高扭度TMD部分子关联函数的参数化结果，并在A有限时研究原子核对TMD部分子分布函数的影响。