Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exclusion statistics in conformal field theory and the UCPF for WZW
  models   In this paper we further elaborate on the notion of fractional exclusion
statistics, as introduced by Haldane, in two-dimensional conformal field
theory, and its connection to the Universal Chiral Partition Function as
defined by McCoy and collaborators. We will argue that in general, besides the
pseudo-particles introduced recently by Guruswamy and Schoutens, one needs
additional `null quasi-particles' to account for the null-states in the
quasi-particle Fock space. We illustrate this in several examples of
WZW-models.

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The categories of this paper are: hep-lat
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: hep-ex