Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-04-23
Nucl.Phys. B514 (1998) 204-226
Physics
High Energy Physics
High Energy Physics - Theory
harvmac, 25 pages
Scientific paper
10.1016/S0550-3213(97)00815-8
We consider the absorption of higher angular momentum modes of scalars into black holes, at low energies, and ask if the resulting cross sections are reproduced by a D-brane model. To get the correct dependence on the volume of the compactified dimensions, we must let the absorbing element in the brane model have a tension that is the geometric mean of the tensions of the D-string and an effective stringlike tension obtained from the D-5-brane; this choice is also motivated by T-duality. In a dual model we note that the correct dependence on the volume of the compact dimensions and the coupling arise if the absorbing string is allowed to split into many strings in the process of absorbing a higher angular momentum wave. We obtain the required energy dependence of the cross section by carrying out the integrals resulting from partitioning the energy of the incoming quantum into vibrations of the string.
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