Scattering of Strings from Dbranes
Abstract
We review a number of perturbative calculations describing the interactions of Dbranes with massless elementary string states. The form factors for the scattering of closed strings off Dbranes are closely related to the Veneziano amplitude. They show that, in interactions with strings, Dbranes acquire many of their physical features: the effective size of Dbranes is of order the string scale and expands with the energy of the probe, while the fixed angle scattering amplitudes fall off exponentially. We also calculate the leading process responsible for the absorption of closed strings: the amplitude for a closed string to turn into a pair of open strings attached to the Dbrane. The inverse of this process describes the Hawking radiation by an excited Dbrane.
 Publication:

Nuclear Physics B Proceedings Supplements
 Pub Date:
 May 1997
 DOI:
 10.1016/S09205632(97)000741
 arXiv:
 arXiv:hepth/9611214
 Bibcode:
 1997NuPhS..55..118H
 Keywords:

 High Energy Physics  Theory
 EPrint:
 16 pages, 4 figures, LaTeX, espcrc2.sty, psfig.sty, fleqn.sty. Based on lectures given by Igor Klebanov at the Trieste Spring School 1996. Minor TeX error corrected