QCD describes the strong force between quarks mediated by gluons
Image: Juhanson, CC BY-SA 3.0, via Wikimedia Commons
QCD (quantum chromodynamics) describes
QCD describes the strong force between quarks mediated by gluons
Related concepts
Solitary confinement
Free quarks are never observed; they're always bound in hadrons
Asymptotic safety
Quarks interact more weakly at higher energies, earning the 2004 Nobel Prize
Strong CP problem
Strong CP problem: why does QCD not violate CP symmetry?
Casimir effect
Casimir effect arises from quantum vacuum fluctuations
Feynman diagram
Feynman diagrams revolutionized theoretical physics
Path integral formulation
Feynman showed a particle takes all possible paths simultaneously
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