## Abstract

The scattering of R-R gauge bosons off of Dirichlet p-branes is computed to leading order in the string coupling. The results are qualitatively similar to those found in the scattering of massless NS-NS bosons: all p-branes with p ≥ 0 exhibit stringy properties, in particular the Regge behavior. Both the R-R and NS-NS scattering amplitudes agree in the limit of small momentum transfer with scattering off the extremal R-R charged p-brane solutions found in the low-energy supergravities. We interpret this as evidence that Dirichlet-branes are an exact world-sheet description of the extremal p-branes. The - 1-brane (D-instanton) is a special object which, unlike all other Dirichlet-branes, exhibits point-like behavior. We show that the field theoretic scattering off of the R-R charged instanton solution to type IIB supergravity exactly reproduces the full stringy calculation. As an aside, we include a discussion of the entropy of nonextremal black holes in ten dimensions, produced by exciting the 0-brane.

Original language | English (US) |
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Pages (from-to) | 231-248 |

Number of pages | 18 |

Journal | Nuclear Physics B |

Volume | 472 |

Issue number | 1-2 |

DOIs | |

State | Published - Jul 22 1996 |

## All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics