Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Momentum-space calculation of four-boson recombination   The system of four identical bosons with large two-boson scattering length is
described using momentum-space integral equations for the four-particle
transition operators. The creation of Efimov trimers via ultracold four-boson
recombination is studied. The universal behavior of the recombination rate is
demonstrated.

32
The categories of this paper are: atom-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: stat
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The categories of this paper are: hep-lat
10
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: plasm-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: eess