2023/12/21 by Torben Skrzypek, Skrzypek, Torben, A.A. Tseytlin +1 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #FOS: Physical sciences #High Energy Physics - Theory (hep-th) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2312.13850
openalex publication_date 2023/12/21 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider type IIB string theory on an AdS5 × S5/ℤ2 orbifold background, which should be dual to 4d N=2 superconformal SU(N)× SU(N) gauge theory with two bi-fundamental hypermultiplets. The correlator of two chiral BPS operators from the twisted sector of this quiver CFT exhibits non-trivial dependence on the 't Hooft coupling λ already in the planar limit. This dependence was recently determined using localisation and the expansion at large λ contains a subleading contribution proportional to ζ(3) λ-3/2. We address the question of how to reproduce this correction on the string theory side by starting with the ζ(3) α'3 term in the type IIB string effective action. We find a solution of type IIB supergravity which represents a resolution of the AdS5 × S5/ℤ2 orbifold singularity and demonstrate that the relevant light twisted sector states may be identified as additional supergravity 2-form modes "wrapping" a finite 2-cycle in the resolution space. Reproducing the structure of the gauge theory result becomes more transparent in the large R-charge or BMN-like limit in which the resolved background takes a pp-wave form with the transverse space being a product of \mathbb R4 and the Eguchi-Hanson space.