Thomas "Tom" John Ypsilantis was known for the co-discovery of the antiproton along with an Italian physicist who was awarded what in 1959?
Thomas Ypsilantis: Thomas "Tom" John Ypsilantis (Greek: Θωμάς Ιωάννη Υψηλάντης ; June 24, 1928 in Salt Lake City, Utah – August 16, 2000 in Geneva, Switzerland) was an American physicist of Greek descent. Thomas Ypsilantis:  Ypsilantis was known for the co-discovery of the antiproton in 1955, along with Owen Chamberlain, Emilio Segrè, and Clyde Wiegand. Emilio Segrè: Emilio Gino Segrè (1 February 1905 – 22 April 1989) was an Italian physicist and Nobel laureate who discovered the elements technetium and astatine, and the antiproton, a sub-atomic antiparticle, for which he was awarded the Nobel Prize in Physics in 1959.
Nobel Prize in Physics