Eugene Feenberg (19.10.1906-7.02.1977) — an American theoretical physicist, a member of the National Academy of Sciences. He graduated from the University of Texas (1929). In 1931—35 he worked at Harvard University, in 1936 —38 at the Institute for Advanced Study in Princeton, in 1938 — 42 at New York University, and from 1946 at Washington University (professor from 1952).
His work was in the field of scattering theory, quantum mechanics, nuclear theory (nuclear forces, nuclear structure) and quantum field theory. In 1932 he formulated the so-called optical theorem, according to which the total cross section of the interaction of a pair of particles is related to the imaginary part of the amplitude of forward elastic scattering. Independently of others he put forward the hypothesis of the charge independence of nuclear forces.