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Obituary: Kenneth A. Johnson

Professor of Physics Kenneth A. Johnson died last week of cancer. He was 67 years old.

Johnson had taught at MITfor 40 years and was a leading researcher in the areas of quantum electrodynamics and quantum field theory.

Johnson was the first to observe the dimensional and chiral anomalies of quantum field theory. Johnson also came up with what is called the MITbag model, which described the properties of a system of confined quarks through his work in quantum chromodynamics. It was one of the first models to describe the properties of hadrons, including protons and neutrons.

Half a lifetime as MITprofessor

Johnson was born on March 26, 1931 in Duluth, Minnesota. He received his BSfrom the Illinois Institute of Technology in 1952. He earned a masters and a PhD from Harvard University in 1954 and 1955 respectively. Johnson joined the MIT faculty in 1958 after having served as a research fellow and lecturer at Harvard and a National Science Foundation Fellow at the Institute for Theoretical Physics in Copenhagen, Denmark. Johnson was promoted to full professor in 1965

"Ken was an outstanding member of the department in every way," said Marc Kastner, head of the MIT Department of Physics. "He was a superb mentor for young faculty and students, an excellent classroom teacher, and a wise counselor on departmental issues. We all miss him."