Impressions of Parton Distribution Functions

被引：0
作者：
Yu, Yang [1 ,2 ]
Roberts, Craig D. [1 ,2 ]
机构：
[1] Nanjing Univ, Sch Phys, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Inst Nonperturbat Phys, Nanjing 210093, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2024年 / 41卷 / 12期
基金：
中国国家自然科学基金;
关键词：
DEEP INELASTIC-SCATTERING; ELECTRON-SCATTERING; SPIN STRUCTURE; MUON-PROTON; HADRON MASS; NUCLEON; QUARK; PION; KAON; QCD;
D O I：
10.1088/0256-307X/41/12/121202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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.
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