Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: De-singularizing the extremal GMGHS black hole via higher derivatives
  corrections   The Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) black hole is an
influential solution of the low energy heterotic string theory. As it is well
known, it presents a singular extremal limit. We construct a regular extension
of the GMGHS extremal black hole in a model with $\mathcal{O}(\alpha')$
corrections in the action, by solving the fully non-linear equations of motion.
The de-singularization is supported by the $\mathcal{O}(\alpha')$-terms. The
regularised extremal GMGHS BHs are asymptotically flat, possess a regular
(non-zero size) horizon of spherical topology, with an $AdS_2\times S^2$ near
horizon geometry, and their entropy is proportional to the electric charge. The
near horizon solution is obtained analytically and some illustrative bulk
solutions are constructed numerically.

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The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: stat