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BMN operators and string field theory

Romuald A. Janik
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Abstract

We extract from gauge theoretical calculations the matrix elements of the SYM dilatation operator. By the BMN correspondence this should coincide with the 3-string vertex of light cone string field theory in the pp-wave background. We find a mild but important discrepancy with the SFT results. If the modified $O(g_2)$ matrix elements are used, the $O(g_2^2)$ anomalous dimensions are exactly reproduced without the need for a contact interaction in the single string sector.

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Romuald A. Janik. 2002-10-03. BMN operators and string field theory. https://doi.org/10.1016/s0370-2693(02)02908-8

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