| | Tsung-Dao Lee (Site not responding. Last check: ) |
 | | Lee immigrated to the United States in 1946, and, although he had no undergraduate degree, he entered the graduate school in physics at the University of Chicago, where he began his collaboration with Yang. |
 | | In 1956 Lee and Yang concluded that the theta-meson and tau-meson, previously thought to be different because they decay by modes of differing parity, are in fact the same particle (now called the K-meson). |
 | | In 1960 Lee was appointed professor of physics at the Institute for Advanced Study, and three years later he returned to Columbia to assume the first Enrico Fermi professorship in physics. |
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