Qed vs. Qcd
Qednoun
Quantum electrodynamics.
Qednoun
a relativistic quantum theory of the electromagnetic interactions of photons and electrons and muons
Qcdnoun
Quantum chromodynamics.
Qcdnoun
a theory of strong interactions between elementary particles (including the interaction that binds protons and neutrons in the nucleus); it assumes that strongly interacting particles (hadrons) are made of quarks and that gluons bind the quarks together
