Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: D-brane Bound States and the Generalised ADHM Construction   We discuss the sigma model description of a D-string bound to k D-fivebranes
in type I string theory. The effective theory is an (0,4) supersymmetric
hyper-Kahler with torsion sigma model on the moduli space of Sp(k) instantons
on R^4. Upon toroidal compactification to five dimensions the model is related
to the type II picture where the target space is a symmetric product of K3's.

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The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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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: nucl-ex
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The categories of this paper are: q-alg
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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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: chem-ph
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The categories of this paper are: quant-ph