On Wess-Zumino terms of Brane-Antibrane systems

TL;DR

This paper computes specific string theory scattering amplitudes involving brane-antibrane systems and derives higher derivative corrections to their Wess-Zumino terms, enhancing understanding of their effective actions.

Contribution

It provides the first higher derivative correction to the Wess-Zumino terms in brane-antibrane systems based on explicit amplitude calculations.

Findings

Exact match of leading order terms with known actions

Derivation of the first higher derivative correction

Confirmation of the consistency of the effective action

Abstract

We calculate the disk level S-matrix element of one closed string RR field, two open string tachyons and one gauge field in type II superstring theory. An expansion for the S-matrix element has been found that its four leading order terms are reproduced exactly by the symmetric trace tachyon DBI and the Wess-Zumino actions of D-brane-anti-D-brane systems. Using this consistency, we have also found the first higher derivative correction to the some of the WZ terms.