Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Higher-Derivative Corrected Black Holes: Perturbative Stability and
  Absorption Cross-Section in Heterotic String Theory   This work addresses spherically symmetric, static black holes in
higher-derivative stringy gravity. We focus on the curvature-squared correction
to the Einstein-Hilbert action, present in both heterotic and bosonic string
theory. The string theory low-energy effective action necessarily describes
both a graviton and a dilaton, and we concentrate on the Callan-Myers-Perry
solution in d-dimensions, describing stringy corrections to the Schwarzschild
geometry. We develop the perturbation theory for the higher-derivative
corrected action, along the guidelines of the Ishibashi-Kodama framework,
focusing on tensor type gravitational perturbations. The potential obtained
allows us to address the perturbative stability of the black hole solution,
where we prove stability in any dimension. The equation describing
gravitational perturbations to the Callan-Myers-Perry geometry also allows for
a study of greybody factors and quasinormal frequencies. We address
gravitational scattering at low frequencies, computing corrections arising from
the curvature-squared term in the stringy action. We find that the absorption
cross-section receives \alpha' corrections, even though it is still
proportional to the area of the black hole event-horizon. We also suggest an
expression for the absorption cross-section which could be valid to all orders
in \alpha'.

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The categories of this paper are: cmp-lg
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The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin