Murray Gell-Mann, American Physicist
Murray Gell-Mann (born September 15, 1929) is an American physicist. He formulated the quark model of hadronic resonances, and identified the SU(3) flavor symmetry of the light quarks, extending isospin to include strangeness, which he also discovered. He created current algebra in the 1960's as a way of extracting predictions from quark models when the fundamental theory was still murky, which led to model-independent sum rules confirmed by experiment. In 1969 he received the Nobel Prize in physics for his contributions and discoveries concerning the classification of elementary particles and their interactions. He is responsible for the see-saw theory of neutrino masses, that produces masses at the inverse-GUT scale in any theory with a right-handed neutrino, like the SO(10) model. He is also known to have played a large role in keeping string theory alive through the 1970's and early 1980's, supporting that line of research at a time when it was unpopular.
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