Gell-Mann, Murray (1929–)
Murray Gell-Mann is an American theoretical physicist who won the 1969 Nobel Prize in Physics for
his application of group theory to
elementary particles, which led to the prediction of the quark as the basic constituent of the baryon and meson. His theory also predicted the existence
of a baryon called the omega-minus particle, which was subsequently discovered
in 1964. Gell-Mann had also introduced in 1953 the concept of strangeness to explain the longevity of certain particles.