“School of Physics”
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| Paper IPM / P / 6621 |
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| Abstract: | |||||
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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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