World-Volume Potentials on D-branes

TL;DR

This paper analyzes low-energy interactions of massless scalars on nonabelian D-branes through string scattering amplitudes, confirming couplings with closed string fields and supporting proposed nonabelian world-volume actions.

Contribution

It provides explicit calculations confirming the couplings of closed string fields to nonabelian D-brane scalars, aligning with recent theoretical proposals.

Findings

Confirmed couplings involve commutators of scalars

Results support nonabelian D-brane world-volume actions

Validated interactions through string scattering amplitudes

Abstract

By evaluating string scattering amplitudes, we investigate various low energy interactions for the massless scalars on a nonabelian Dirichlet brane. We confirm the existence of couplings of closed string fields to the world-volume scalars, involving commutators of the latter. Our results are consistent with the recently proposed nonabelian world-volume actions for Dp-branes.