Nucleon spin structure and QCD spin physics

TL;DR

This paper reviews the progress and remaining questions in understanding the nucleon spin structure, highlighting recent developments and future prospects in QCD spin physics.

Contribution

It provides a comprehensive overview of the current state of nucleon spin research and discusses recent activities in QCD spin physics.

Findings

Significant progress has been made in understanding nucleon spin.

Many fundamental questions about nucleon spin remain unsolved.

Current research focuses on exploring unresolved aspects of QCD spin physics.

Abstract

Our knowledge of the nucleon spin structure has greatly improved over the last twenty years or so, but still many fundamental questions remain unsolved. I will try to review some of the puzzling aspects of the structure of the nucleon spin, in particular, what is known, what remains to be discovered and the prospects for the near future. I will also focus on some current activities in QCD spin physics.