QCD: Challenges for the Future

TL;DR

This paper reviews the current state and future challenges of Quantum Chromodynamics (QCD), emphasizing the role of upcoming colliders in addressing open questions in strong interaction physics, including measurements of s, parton distributions, and low x physics.

Contribution

It highlights the potential of future colliders to advance understanding of QCD through improved measurements and exploration of unresolved questions.

Findings

Potential improvements in s measurement accuracy

Enhanced understanding of parton distribution functions

Insights into low x physics at future facilities

Abstract

Despite many experimental verifications of the correctness of our basic understanding of QCD, there remain numerous open questions in strong interaction physics and we focus on the role of future colliders in addressing these questions. We discuss possible advances in the measurement of $\alpha_s$, in the study of parton distribution functions, and in the understanding of low $x$ physics at present colliders and potential new facilities. We also touch briefly on the role of spin physics in advancing our understanding of QCD.