paper

Superstring Scattering from D-Branes Bound States

arXiv:hep-th/9805078 · doi:10.1088/1126-6708/1998/12/008

Abstract

We derive fully covariant expressions for disk scattering amplitudes of any two massless closed strings in which mixed Neumann and Dirichlet world-sheet boundary conditions are included. From the two-point amplitudes, we derive the long range background fields and verify that they correspond to D-brane bound state. Also, from the scattering amplitudes, we calculate the linear coupling of closed string fields to D-brane world-volume and show that they are consistent with Born-Infeld and Chern-Simons actions in the presence of a background field.

28 pages, Latex, an appendix is added

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