Oscar W. Greenberg

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Oscar Wallace Greenberg (born February 18, 1932)[citation needed] is an American physicist and professor at University of Maryland College of Computer, Mathematical, and Natural Sciences. He posited the existence of a hidden, 3-valued charge, called color charge, of subatomic particles, "quarks," in 1964, the same year that quarks were posited as constituents of hadrons by Murray Gell-Mann and, independently, by George Zweig.

Educational background[edit]

He received his bachelor's degree from Rutgers University in 1952. He received his master's degree in 1954 and his doctorate degree in 1957, both from Princeton University.

Professional History[edit]

  • 1956 Instructor at Brandeis University.
  • 1957 Air Force Cambridge Research Center, 1st Lieutenant, USAF.
  • 1959 NSF postdoctoral fellow at MIT.
  • 1961 Assistant professor, University of Maryland.
  • 1963 Associate professor, University of Maryland.
  • Fall, 1964, Member, Institute for Advanced Study.
  • 1964 Proposed the existence of color charge.
  • 1965-66 Visiting Associate professor, Rockefeller University.
  • 1967- Professor, University of Maryland.
  • 1968 Guggenheim Fellowship[1]
  • 1968-69 Visiting Professor, Weizmann Institute of Science and Tel-Aviv University.
  • 2013- Member of Adjunct Faculty, Rockefeller University.


  1. ^ "Oscar Wallace Greenberg". John Simon Guggenheim Memorial Foundation.

External links[edit]