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The J/ψ particle was discovered by Samuel C. C. Ting at Brookhaven National Laboratory in 1974. Ting and his team were conducting experiments with an electron-positron collider when they observed the particle. The J/ψ particle is a charm quark-antiquark bound state, and its discovery was the first evidence of charm quarks. Ting's discovery earned him the Nobel Prize in Physics in 1976.