Abstract
We revisit the calculation of holographic correlators in AdS3. We develop new methods to evaluate exchange Witten diagrams, resolving some technical difficulties that prevent a straightforward application of the methods used in higher dimensions. We perform detailed calculations in the AdS3× S3× K 3 background. We find strong evidence that four-point tree-level correlators of KK modes of the tensor multiplets enjoy a hidden 6d conformal symmetry. The correlators can all be packaged into a single generating function, related to the 6d flat space superamplitude. This generalizes an analogous structure found in AdS5× S5 supergravity.
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Rastelli, L., Roumpedakis, K. & Zhou, X. AdS3× S3 tree-level correlators: hidden six-dimensional conformal symmetry. J. High Energ. Phys. 2019, 140 (2019). https://doi.org/10.1007/JHEP10(2019)140
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DOI: https://doi.org/10.1007/JHEP10(2019)140