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Operator Mixing and the BMN Correspondence

Neil R. Constable, Daniel Z. Freedman, Matthew Headrick, Shiraz Minwalla

hep-tharXiv:hep-th/0209002

Abstract

In this note we update the discussion of the BMN correspondence and string interactions in hep-th/0205089 to incorporate the effects of operator mixing. We diagonalize the matrix of two point functions of single and double trace operators, and compute the eigen-operators and their anomalous dimensions to order g22 λ'. Surprisingly, operators in different R symmetry multiplets remain degenerate at this order. We also calculate the corresponding energy shifts in string theory, and find a discrepancy with field theory results, indicating possible new effects in light-cone string field theory.

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