Impressions of Parton Distribution Functions  

作　　者：Yang Yu Craig D.Roberts 俞杨;Craig D.Roberts(School of Physics,Nanjing University,Nanjing 210093,China;Institute for Nonperturbative Physics,Nanjing University,Nanjing 210093,China)

机构地区：[1]School of Physics,Nanjing University,Nanjing 210093,China [2]Institute for Nonperturbative Physics,Nanjing University,Nanjing 210093,China

出　　处：《Chinese Physics Letters》2024年第12期53-59,共7页中国物理快报（英文版）

基　　金：National Natural Science Foundation of China(Grant No.12135007).

摘　　要：Parton distribution functions(DFs)have long been recognized as key measures of hadron structure.Today,theoretical prediction of such DFs is becoming possible using diverse methods for continuum and lattice analyses of strong interaction(QCD)matrix elements.Recent developments include a demonstration that continuum and lattice analyses yield mutually consistent results for all pion DFs,with behavior on the far valence domain of light-front momentum fraction that matches QCD expectations.Theory is also delivering an understanding of the distributions of proton mass and spin amongst its constituents,which varies,of course,with the resolving scale of the measuring probe.Aspects of the pion DF and proton spin developments are sketched herein,along with some novel perspectives on gluon and quark orbital angular momentum.

关 键 词：STRUCTURE mutually SKETCH 

分 类 号：O572.33[理学—粒子物理与原子核物理]