Taylor, Marika (2008) Matching of correlators in AdS3/CFT2. Journal of High Energy Physics, 2008 (6), JHEP06(2008)010-[16pp]. (doi:10.1088/1126-6708/2008/06/010).
Abstract
Recently exact agreement has been found between three-point correlators of (single particle) chiral operators computed in string theory on AdS3 × S3 × T4 with NS-NS flux and those computed in the symmetric orbifold CFT. However, it has also been shown that these correlators disagree with those computed in supergravity, under any identification of single particle operators which respects the symmetries. In this note we resolve this disagreement: the key point is that mixings with multi-particle operators are not suppressed even at large N in extremal correlators. Allowing for such mixings, orbifold/string theory operators and supergravity operators can be matched such that both non-extremal and extremal three point functions agree, giving further evidence for the non-renormalization of the chiral ring.
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