1931- . US high-energy physicist who, in the
1960s, designed the Stanford Positron
Accelerating Ring (SPEAR). In 1974 Richter
used SPEAR to produce a new particle, later
named the `psi' (psi) particle, thought to be
formed from the charmed quark postulated by
Sheldon Glashow. Richter shared the 1976
Nobel Physics Prize with Samuel Ting.