Oscar W. Greenberg

Oscar Wallace Greenberg (born February 18, 1932) 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

• 1952 Bachelor's degree, Rutgers University
• 1954 Master's degree, Princeton University
• 1957 Doctorate degree, Princeton University

Professional History

• 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.
• 1968-69 Visiting Professor, Weizmann Institute of Science and Tel-Aviv University.
• 2013- Member of Adjunct Faculty, Rockefeller University.