Gell-Mann,+Murray+6

​ =DON'T STOP BELIEVING-(MR. GELL-MANN'S THEORIES AND BELIEFS) = He is responsible for developing the quark model of hadronic resonances. He also discovered the SU(3) flavor symmetry of the light quarks, extending isospin to include strangeness. Working with Richard Feynman, he discovered the V-A theory of chiral neutrinos. In the 1960's he created the current day algebra as a way of extracting predictions from quark models. Gell-Mann, and Maurice Levy, discovered the sigma model of pions, which describes low energy pion interactions. They changed the integer-charged quark model of Han and Nambu. Fritzsch and Gell-Mann were the first to write the modern accepted theory of quantum chromodynamics. Gell-Mann is responsible for the see-saw theory of neutrino masses. He also played a large role in keeping the string theory alive through the 1970s. Home Sweet Home