World Volume Approach to Absorption by Non-dilatonic Branes

Details World Volume Approach to Absorption by Non-dilatonic Branes World Volume Approach to Absorption by Non-dilatonic Branes

1997-02-09

arxiv.org/abs/hep-th/9702076v2

Nucl.Phys. B496 (1997) 231-242

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, harvmac; section 3 revised, references added, all conclusions remain unchanged

Scientific paper

10.1016/S0550-3213(97)00235-6

We calculate classical cross sections for absorption of massless scalars by the extremal 3-branes of type IIB theory, and by the extremal 2- and 5-branes of M-theory. The results are compared with corresponding calculations in the world volume effective theories. For all three cases we find agreement in the scaling with the energy and the number of coincident branes. For 3-branes, whose stringy description is known in detail in terms of multiple D-branes, the string theoretic absorption cross section for low energy dilatons is in exact agreement with the classical gravity. This suggests that scattering from extremal 3-branes is a unitary process well described by perturbative string theory.

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