Correlation functions and massive Kaluza-Klein modes in the AdS/CFT correspondence
| Autor: | Hugh Osborn, Emery Sokatchev, F.A. Dolan, Gleb Arutyunov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Physics
High Energy Physics - Theory Nuclear and High Energy Physics Unitarity Supergravity Kaluza–Klein theory FOS: Physical sciences AdS/CFT correspondence High Energy Physics::Theory Operator (computer programming) Amplitude High Energy Physics - Theory (hep-th) Field theory (psychology) Gauge theory Mathematical physics |
| Zdroj: | Nuclear Physics B |
| Popis: | We study four-point correlation functions of 1/2-BPS operators in N=4 SYM which are dual to massive KK modes in AdS_5 supergravity. On the field theory side, the procedure of inserting the SYM action yields partial non-renormalisation of the four-point amplitude for such operators. In particular, if the BPS operators have dimensions equal to three or four, the corresponding four-point amplitude is determined by one or two independent functions of the two conformal cross-ratios, respectively. This restriction on the amplitude does not merely follow from the superconformal Ward identities, it also encodes dynamical information related to the structure of the gauge theory Lagrangian. The dimension 3 BPS operator is the AdS/CFT dual of the first non-trivial massive Kaluza-Klein mode of the compactified type IIB supergravity, whose interactions go beyond the level of the five-dimensional gauged N=8 supergravity. We show that the corresponding effective Lagrangian has a surprisingly simple sigma-model-type form with at most two derivatives. We then compute the supergravity-induced four-point amplitude for the dimension 3 operators. Remarkably, this amplitude splits into a "free" and an "interacting" parts in exact agreement with the structure predicted by the insertion procedure. The underlying OPE fulfills the requirements of superconformal symmetry and unitarity. LaTex, 47 pages, 4 figures, the discussion of short representations in the OPE extended |
| Databáze: | OpenAIRE |
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