New aspects of the BMN correspondence beyond the planar limit

Details New aspects of the BMN correspondence beyond the planar limit New aspects of the BMN correspondence beyond the planar limit

2004-07-13

arxiv.org/abs/hep-th/0407098v1

Nucl.Phys. B704 (2005) 583-603

Physics

High Energy Physics

High Energy Physics - Theory

20 pages, 1 figure

Scientific paper

10.1016/j.nuclphysb.2004.10.016

Motivated by recent disagreements in the context of AdS/CFT, we study the non-planar sector of the BMN correspondence. In particular, we reconsider the energy shift of states with two stringy excitations in light-cone string field theory and explicitly determine its complete perturbative contribution from the impurity-conserving channel. Surprisingly, our result neither agrees with earlier leading order computations, nor reproduces the gauge theory prediction. More than that, it features half-integer powers of the effective gauge coupling $\lambda'$ representing a qualitative difference to gauge theory. Based on supersymmetry we argue that the above truncation is not suited for conclusive tests of the BMN duality.

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