Mary Katherine Gaillard (born 1939), American theoretical physicist. Gaillard received her Bachelors degree in Physics at Hollins College in 1960. She then completed her masters at Columbia University. Gaillard moved to France and completed her Doctorat d'Etat in Theoretical Physics at the University of Paris at Orsay. Gaillard worked on strong interaction corrections and weak transitions, leading to the successful prediction of the charmed quark mass. She has also worked on electron-positron collisions, and supergravity theories based on superstrings. She was awarded the 1993 J. J. Sakurai Prize for Theoretical Particle Physics. Gaillard has been a Professor at UC Berkeley since 1981. Photographed at CERN, the European particle physics laboratory to present her published autobiography and to present a seminar.