**Geoffrey F. Chew** (born in 1924) is an American

theoretical physicist.

He has worked as a professor of physics at the

UC Berkeley since 1957 and has been an emeritus since 1991. Chew holds a PhD in theoretical particle physics (1944-1946) from the

University of Chicago. Between 1950 and 1956, he was a physics faculty member at the

University of Illinois. In addition, Chew was a member of the National Academy of Sciences as well as the American Academy of Arts and Science.

## Achievements

Chew was a student of

Enrico Fermi, his students including

David Gross and

John H. Schwarz. He was known as a leader of the

S-matrix approach to the

strong interaction and the associated

bootstrap principle, a theory whose popularity peaked in the 1960s when he led an influential theory group at UC Berkeley. S-matrix theorists sought to understand the strong interaction by using the analytic properties of the

scattering matrix to calculate the interactions of

bound-states without assuming that there is a point-particle field theory underneath. The S-matrix approach did not provide a local space-time description. Although it was not immediately appreciated by the practitioners, it was a natural framework in which to produce a

quantum theory of gravity.

Chew's central contribution to the program came in 1960. Along with collaborator

Steven Frautschi, they noted that the

mesons fall into

families where the square of the mass is linearly proportional to the spin, with the same constant of...

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