    chen-ning franklin yang (; born october&nbsp;1, 1922), also known as yang zhenning, is a chinese-born american physicist who works on statistical mechanics and particle physics. he and tsung-dao lee received the 1957 nobel prize in physics  for their work on parity nonconservation of weak interaction, proved experimentally that one of the basic quantum-mechanics laws, called the conservation of parity, is violated in the so-called weak nuclear reactions, those nuclear processes that result in the emission of beta or alpha particles of nuclear's radioactivities reactions. yang became a naturalized american citizen in 1964.{{cite web |title=facts on file web site| url=http://www.fofweb.com/history/mainprintpage.asp?ipin=as0298&datatype=americanhistory&wintype=free| accessda
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