Derivation of the NS5-brane limit of the plane wave matrix model

Abstract

From the gauge/gravity duality, it was predicted that there exists a nontrivial double scaling limit of the plane wave matrix model (the BMN matrix model), which describes the type IIA little string theory (LST) on $R\times S^5$. We show on the gauge theory side that such a limit indeed exists for the partition function and in a certain 1/4 BPS sector of the matrix model, and consequently derive an eigenvalue integral, which is expected to describe the 1/4 BPS sector of LST.