World-Volume Interactions on D-Branes
M.R. Garousi, R.C. Myers
TL;DR
This paper analyzes string scattering amplitudes to derive the effective world-volume interactions on D-branes, confirming they align with Born-Infeld and Chern-Simons actions and depend on scalar fields representing transverse fluctuations.
Contribution
It provides a detailed derivation of D-brane world-volume interactions from string scattering amplitudes, validating the functional dependence on scalar fields.
Findings
Leading low-energy interactions match Born-Infeld and Chern-Simons actions.
Background closed string fields are functionals of non-abelian scalar fields.
Results support the functional dependence of background fields on brane fluctuations.
Abstract
We examine in detail various string scattering amplitudes in order to extract the world-volume interactions of massless fields on a Dirichlet brane. We find that the leading low-energy interactions are consistent with the Born-Infeld and Chern-Simons actions. In particular, our results confirm that the background closed string fields appearing in these actions must be treated as functionals of the non-abelian scalar fields describing transverse fluctuations of the D-brane.
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