A Modern View of Perturbative QCD and Application to Heavy Quarkonium Systems

TL;DR

This paper provides a modern overview of perturbative QCD, connecting theoretical advances with applications to heavy quarkonium systems and interquark forces, highlighting progress in computational methods and mathematical intersections.

Contribution

It offers a comprehensive modern perspective on perturbative QCD and demonstrates its application to heavy quarkonium and interquark forces, including impacts on nonperturbative physics.

Findings

Unified view of perturbative predictions and effective field theories

Application of perturbative QCD to heavy quarkonium systems

Insights into interquark forces and Lambda_QCD physics

Abstract

Perturbative QCD has made significant progress over the last few decades. In the first part, we present an introductory overview of perturbative QCD as seen from a modern viewpoint. We explain the relation between purely perturbative predictions and predictions based on Wilsonian effective field theories. We also review progress of modern computational technologies and discuss intersection with frontiers of mathematics. Analyses of singularities in Feynman diagrams play key roles towards developing a unified view. In the second part, we discuss application of perturbative QCD, based on the formulation given in the first part, to heavy quarkonium systems and the interquark force between static color charges. We elucidate impacts on order Lambda_QCD physics in the quark mass and interquark force, which used to be considered inaccessible by perturbative QCD.