Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scattering by deformed black holes   Obtaining black hole solutions in alternative theories of gravity can be a
difficult task due to cumbersome field equations that arise in many of such
theories. In order to study the strong field regime in a model-free approach,
one can consider deformed black hole solutions with additional parameters
beyond mass, charge and angular momentum. We investigate the scattering and
absorption of a massless scalar field by non-Schwarzschild black holes,
considering the Johannsen and Psaltis parametrization. In particular, we study
the scattering process by the classical (null geodesics analysis),
semiclassical (glory approximation) and partial waves approaches. We present
the formalism needed to compute the scattering and absorption of massless
scalar waves by Schwarzschild-like black holes with a set of deformation
parameters in addition to their mass and present a selection of our results. We
compare our numerical results for the scattering cross section with the
classical and semiclassical results, obtaining excellent agreement.

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The categories of this paper are: ao-sci
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: acc-phys
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: hep-ex
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The categories of this paper are: q-alg