# Quantum Chromodynamics (QCD) Intro

Canonical: https://manyspace.aporia.systems/topics/quantum-chromodynamics-qcd-intro-phy-part-163
Updated: 2026-10-13

Physics · Particle Physics · PHY-PART-163

- Difficulty: 4 / 5
- Importance: 4 / 5
- Study time: 6.5–12 h

color charge, confinement, asymptotic freedom

## Why it matters

The standard model of elementary particles and forces — the current frontier description of matter at shortest distances.

## Where it is used

Accelerator experiments (LHC), medical imaging (PET), radiation safety, cosmology bridges, detector engineering.

## How you know you have learned it

Explain/derive key result from memory + solve 2 non-routine checks.

## What you need first

- [Postulates & Simultaneity](https://manyspace.aporia.systems/topics/postulates-simultaneity-phy-sr-076) (required)
- [Historical Foundations](https://manyspace.aporia.systems/topics/historical-foundations-phy-qm-105) (required)

## Resources

- Introduction to Elementary Particles — David Griffiths
- Introduction to Elementary Particles — David Griffiths
- Particle Physics — Martin & Shaw