More on the gauge-fixed D3-brane action with dilaton-axion coupling from N=1 superspace

TL;DR

This paper formulates the gauge-fixed D3-brane action with dilaton-axion coupling in N=1 superspace, analyzing its symmetries and the supermultiplet structure necessary for off-shell supersymmetry.

Contribution

It introduces a superspace formulation of the D3-brane action with dilaton-axion coupling and clarifies the supermultiplet structure needed for off-shell supersymmetry.

Findings

Identification of the superspace form of the D3-brane action with dilaton-axion coupling

Analysis of the symmetries, including hidden supersymmetry

Necessity of a linear superfield coupled to an abelian Chern-Simons superfield

Abstract

The gauge-fixed action of a `spacetime-filling' D3-brane with dilaton-axion coupling is formulated in N=1 superspace. We investigate its symmetries by paying special attention to a possible non-linearly realized extra (hidden) supersymmetry, and emphasize the need of a linear superfield coupled to an abelian Chern-Simons superfield to represent a dilaton-axion supermultiplet in the off-shell manifestly supersymmetric approach.