What fundamental concept did Gell-Mann introduce regarding particles in Quantum Chromodynamics?
Confinement of quarks
Exclusion principle for quarks
Spin-statistics for quarks
Conservation of color charge
Answer
Confinement of quarks is the idea that quarks are always bound together inside composite particles such as protons and neutrons, and cannot exist in isolation. This is a consequence of the strong force, which is one of the four fundamental forces of nature. The strong force is very strong at short distances, but it falls off rapidly with distance.
The Magnificent Mind of Murray Gell-Mann: A Spectacular Quiz on the Life and Work of an American Physics Luminary