On a Large N Degeneracy in N=4 SYM and the AdS/CFT Correspondence

Details On a Large N Degeneracy in N=4 SYM and the AdS/CFT Correspondence On a Large N Degeneracy in N=4 SYM and the AdS/CFT Correspondence

2003-01-09

arxiv.org/abs/hep-th/0301058v2

Nucl.Phys. B663 (2003) 163-196

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 5 figures, LaTex, the Summary and Conclusions section extended, references added

Scientific paper

10.1016/S0550-3213(03)00353-5

We study the four-point correlator of 1/2-BPS operators of weight 4 in N=4 SYM, which are dual to massive KK modes in AdS_5 supergravity. General field-theoretic arguments lead to a partially non-renormalized form of the amplitude that depends on two a priori independent functions of the conformal cross-ratios. We explicitly compute the amplitude in the large N limit at one loop (order g^2) and in AdS_5 supergravity. Surprisingly, the one-loop result shows that the two functions determining the amplitude coincide while in the supergravity regime they are distinctly different. We discuss the possible implications of this perturbative degeneracy for the AdS/CFT correspondence.

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