BMN operators and string field theory

Sep, 2002
11 pages
Published in:
  • Phys.Lett.B 549 (2002) 237-244
e-Print:

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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(g2)O(g_2) matrix elements are used, the O(g22)O(g_2^2) anomalous dimensions are exactly reproduced without the need for a contact interaction in the single string sector.
Note:
  • 11 pages: v2: references added
  • field theory: string
  • supersymmetry
  • gauge field theory: Yang-Mills
  • operator: algebra
  • Hamiltonian formalism
  • light cone gauge
  • scaling