Four-point correlators with higher weight superconformal primaries in the AdS/CFT Correspondence

Nov, 2008
31 pages
Published in:
  • JHEP 03 (2009) 133
e-Print:
Report number:
  • DAMTP-2008-106

Citations per year

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Abstract: (arXiv)
The four-point correlation function of two 1/2 BPS primaries of conformal weight Δ=2\Delta=2 and two 1/2-BPS primaries of conformal weight Δ=n\Delta=n is calculated in the large 't Hooft, large NN limit. These operators are dual to Kaluza-Klein supergravity fields sks_k with masses m2=4m^2=-4 and m2=n(n4)m^2=n(n-4). Given that the existing formalism for evaluating sums of products of SO(6) tensors that determine the effective couplings is only suitable for primaries with small conformal dimensions, we make us of an alternative formalism based on harmonic polynomials introduced by Dolan and Osborn. We then show that the supergravity lagrangian relevant to the computation is of sigma-model type (i.e., the four-derivative couplings vanish) and that the final result for the connected amplitude splits into a free and an interacting part, as expected on general grounds.
  • AdS/CFT correspondence
  • soliton: BPS
  • Kaluza-Klein model
  • n-point function: 4
  • supergravity
  • sigma model: nonlinear
  • duality