1974: The J/ψ meson was independently discovered by a group at the Stanford Linear Accelerator Center, headed by Burton Richter, and by a group at Brookhaven National Laboratory, headed by Samuel Ting of MIT.
In 1974, the J/ψ meson was simultaneously discovered by two separate research teams: one at the Stanford Linear Accelerator Center under the leadership of Burton Richter, and another at Brookhaven National Laboratory under the direction of Samuel Ting from MIT.