Penrose Limits of the Baryonic D5-brane

TL;DR

This paper explores the Penrose limits of a D5-brane baryon vertex in AdS_5 x S^5, revealing supersymmetry properties and connections to flat space BIon configurations.

Contribution

It analyzes the supersymmetry of D5-branes under Penrose limits and identifies conditions leading to different supersymmetric configurations.

Findings

Maximally supersymmetric Hpp-wave limit yields a 1/2-supersymmetric null brane.

Alternative radial geodesic results in a 1/4-supersymmetric configuration.

Connections established between Penrose limits and flat space BIon solutions.

Abstract

The Penrose limits of a D5-brane wrapped on the sphere of AdS_5 x S^5 and connected to the boundary by M fundamental strings, which is dual to the baryon vertex of the N=4 SU(M) super Yang-Mills theory, are investigated. It is shown that, for null geodesics that lead to the maximally supersymmetric Hpp-wave background, the resulting D5-brane is a 1/2-supersymmetric null brane. For an appropriate choice of radial geodesic, however, the limiting configuration is 1/4-supersymmetric and closely related to the Penrose limit of a flat space BIon.