Abraham Pais

From the New York Times, July 21, 2000:

Dr. Abraham Pais [was] a physicist who helped build the conceptual foundations of the modern theory of elementary particles, then became a science historian and wrote one of the most acclaimed of all biographies of Einstein. [He] proposed a concept called ''associated production'' to explain why certain particles lived for unexpectedly long times before decaying. The particles, he suggested, were produced rapidly in pairs, but neither could decay quickly on its own.

James Glanz, "Dr. Abraham Pais, 82, Physicist and Science Historian, Dies," New York Times, July 21, 2000.