Consistent bilinear Wess-Zumino term for open AdS superstring

TL;DR

This paper modifies the bilinear Wess-Zumino term in the open superstring action in AdS_5 x S^5 to accurately describe 1/2-BPS D(-1)-branes, providing a covariant supersymmetric D-brane framework.

Contribution

It introduces a modified bilinear Wess-Zumino term that correctly captures the supersymmetric D-branes, especially the 1/2-BPS D(-1)-brane, in AdS_5 x S^5 background.

Findings

Modification is necessary for accurate D(-1)-brane description.

The classification of other supersymmetric D-branes remains unaffected.

Provides a covariant description of supersymmetric D-branes.

Abstract

We consider the open superstring action in AdS_5 x S^5 background with the bilinear Wess-Zumino term, which has been modified in such a way that a certain total derivative term is absent, and give the covariant description of supersymmetric D-branes. We show that the modification of bilinear Wess-Zumino term is necessary to describe correctly the 1/2-BPS D(-1)-brane in AdS_5 x S^5 background, while the classification of other supersymmetric D-branes does not depend on such modification.