A Worldsheet Description of Large N_c Quantum Field Theory

Abstract

The N_c to infinity limit of a matrix quantum field theory is equivalent to summing only planar Feynman diagrams. The possibility of interpreting this sum as some kind world-sheet theory has been in the air ever since 't Hooft's original paper. We establish here just such a world sheet description for a scalar quantum field with interaction term g\Trϕ^3, and we indicate how the approach might be extended to more general field theories.

16 pages, 3 figures, latex, typos corrected, references added, interpretation of ghost determinant clarified

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