Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermions in a Global Monopole Background   We study the scattering of fermions in a ``global monopole'' background
metric. This is the four-dimensional analogue of the scattering on a cone in
three dimensions. The scattering amplitude is exactly obtained. We then study
massless fermion-dyon systems in such a background metric. The density of the
$S$-wave fermion condensate is found to be given by a constant times the flat
space value of Callan and Rubakov.

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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ph
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The categories of this paper are: adap-org
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The categories of this paper are: cond-mat
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The categories of this paper are: plasm-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: q-alg
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The categories of this paper are: chem-ph