Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The eta-prime -> eta pi pi decay in U(3) chiral perturbation theory   The dominant decay mode of the eta-prime, eta-prime -> eta pi pi, is
investigated within the framework of infrared regularized U(3) chiral
perturbation theory up to fourth chiral order and including one-loop
corrections. We find reasonable agreement with experimental data and observe
convergence of the chiral series.

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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: hep-th
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The categories of this paper are: eess