Speaker
Description
We consider a $\mathcal{N}=2$ SCFT in $d=4$ described by a circular quiver with $M$ nodes. The protected chiral single traces can be organized in unwtisted and twisted operators. The structure constants of such operators can be computed at large $N$ using localization and the result can be continued towards strong 't Hooft coupling. In this regime we can check it against the holographic description of the theory on $AdS_5 \times S_5/Z_M$. The untwisted and twisted/untwisted structure constants are precisely accounted for by the Witten diagrams derived from the supergravity lagrangian. In the case of the structure constants involving only twisted operators - which in the gauge theory side is on par with the other cases - the needed cubic vertices should come instead from higher derivative corrections due to the interaction of three twisted closed strings. Preliminary results indicate that this is indeed the case.
