Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Type II NS Five-Branes: Non Critical Strings and their Topological
  Sectors   The near-horizon geometry of parallel NS5-branes is described by an exact
superconformal 2d field theory based on K^10 = W(k)^4 x M^6, with M^6 a flat
5+1 space time and W(k)^4 =U(1) x SU(2)(k), a four dimensional background with
non-trivial dilaton. The ten-dimensional ``BULK'' spectrum of excitations of
K^10 can be derived combining unitary representations of the N=4 superconformal
theory of W(k)^4 and M^6 in a modular-invariant way. All Bulk states are
massive and belong to the long representations of the N=2 six dimensional
space-time supersymmetry. The NS5-brane states, propagating on M^6, belong to
the short representations of N=2. Both the bulk and the brane spectrum is
derived using the powerful worldsheet technics of the N=4 superconformal
theories. We claim that both bulk and brane states are necessary to well define
the theory. The non abelian U(n) or SO(2n) structure of the 5-brane fields
follows from the fusion coefficients appearing in the correlation functions
involving SU(2)(k) conformal fields.

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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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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: cs
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin
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The categories of this paper are: funct-an