Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Macroscopic open strings and gravitational confinement   We consider classical solutions for strings ending on magnetically charged
black holes in four-dimensional Kaluza-Klein theory. We examine the classical
superstring and the global vortex, which can be viewed as a nonsingular model
for the superstring. We show how both of these can end on a Kaluza-Klein
monopole in the absence of self-gravity. Including gravitational back-reaction
gives rise to a confinement mechanism of the magnetic flux of the black hole
along the direction of the string. We discuss the relation of this work to
localized solutions in ten dimensional supergravity.

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The categories of this paper are: cs
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: physics
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th