String amplitudes in the Hpp-wave limit of AdS3xS3

TL;DR

This paper calculates string scattering amplitudes in a specific pp-wave background derived from AdS3xS3, clarifies symmetry roles, and proposes a holographic formula relevant for the AdS3/CFT2 correspondence.

Contribution

It provides explicit computations of string amplitudes in the Hpp-wave limit and extends the understanding of holographic dualities in this context.

Findings

Computed string amplitudes in the pp-wave background.

Clarified the role of SU(2) symmetry in the background.

Proposed a holographic formula for correlators in the BMN limit.

Abstract

We compute string amplitudes on pp-waves supported by NS-NS 3-form fluxes and arising in the Penrose limit of AdS3xS3xM. We clarify the role of the non-chiral accidental SU(2) symmetry of the background. We comment on the extension of our results to the superstring and propose a holographic formula in the BMN limit of the AdS3/CFT2 correspondence valid for any correlator.