Writing CFT correlation functions as AdS scattering amplitudes

Details Writing CFT correlation functions as AdS scattering amplitudes Writing CFT correlation functions as AdS scattering amplitudes

2010-11-05

arxiv.org/abs/1011.1485v1

JHEP 1103:025,2011

Physics

High Energy Physics

High Energy Physics - Theory

23 pages + appendices

Scientific paper

10.1007/JHEP03(2011)025

We explore the Mellin representation of conformal correlation functions recently proposed by Mack. Examples in the AdS/CFT context reinforce the analogy between Mellin amplitudes and scattering amplitudes. We conjecture a simple formula relating the bulk scattering amplitudes to the asymptotic behavior of Mellin amplitudes and show that previous results on the flat space limit of AdS follow from our new formula. We find that the Mellin amplitudes are particularly useful in the case of conformal gauge theories in the planar limit. In this case, the four point Mellin amplitudes are meromorphic functions whose poles and their residues are entirely determined by two and three point functions of single-trace operators. This makes the Mellin amplitudes the ideal objects to attempt the conformal bootstrap program in higher dimensions.

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