Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $\Phi^{(2)}$ Perturbations of WZW Model   We study $su(2)_k$ WZW model perturbed by a multiplet of primary fields. The
theory has a rich variety of particles. Presence of nontrivial decay processes
is a peculiarity of the model. We prove integrability by explicit construction
of quantum conserved currents. The scattering theory is briefly discussed.

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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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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: nlin
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th