Quantum Chromodynamics

TL;DR

This paper provides an overview of Quantum Chromodynamics, covering its classical formulation, quantization, renormalization, symmetries, and the scale dependence of the coupling constant, essential for understanding strong interactions.

Contribution

It offers a comprehensive review of the theoretical foundations and key concepts of QCD, including perturbative quantization and renormalization techniques.

Findings

Detailed discussion of the renormalization scale dependence of α_s

Analysis of symmetries in QCD

Clarification of the perturbative quantization process

Abstract

The classical Lagrangian of chromodynamics, its quantization in the perturbation theory framework, and renormalization form the subject of these lectures. Symmetries of the theory are discussed. The dependence of the coupling constant $\alpha_s$ on the renormalization scale $\mu$ is considered in detail.