Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Absorption by Near-Extremal Black Branes   We study the absorption of a minimally coupled scalar in the gravitational
background created by a stack of near-extremal black three-branes, and more
generally by M2, M5 and Dp branes. The absorption probability has the form P(l)
= P_0(l) f_l(\lambda), where P_0(l) is the partial wave's absorption
probability in the extremal case, and the thermal factor f_l(\lambda) depends
on the ratio of the frequency of the incoming wave and the Hawking temperature,
\lambda = \omega/\pi T. Using Langer-Olver's method, we obtain a
low-temperature (\lambda \gg 1) asymptotic expansion for P(l) with coefficients
determined recursively. This expansion, which turns out to be a fairly good
approximation even for \lambda \sim 1, accounts for all power-like
finite-temperature corrections to P_0(l), and we calculate a few terms
explicitly. We also show that at low temperature the absorption probability
contains exponentially suppressed terms, and attempt to develop an
approximation scheme to calculate those. The high-temperature expansion is also
considered. For the s-wave, the low-temperature gravity result is consistent
with the free finite-temperature field theory calculation, while for high
temperature and higher partial waves we find a disagreement. As a check of the
approximation methods used, we apply them to the D1-D5-brane system, and
compare results to the known exact solution.

0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an