Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Gluonic Decay of the $b$--Quark and tne $\eta '$--Meson   The observed inclusive decay of B-mesons into eta' + X is interpreted as the
consequence of the gluonic decay of the b-quark into an s-quark. As a result of
the QCD anomaly this decay proceeds partly as the decay b ---> s + eta',
similar to b ---> s + J/psi. The hadronic recoiling system is found to have a
relatively large mass. Analogously one expects a decay of the type b ---> s +
sigma. The branching ratios for these decays are large (of the order of 10%).
The results indicate that there is no room for an anomalously large
chromomagnetic decay mode of the b-quark. Gluon jets are expected to exhibit an
anomalously large tendency to fragment into eta'- and sigma-mesons.

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The categories of this paper are: bayes-an
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The categories of this paper are: astro-ph
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The categories of this paper are: funct-an
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
2
The categories of this paper are: math
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The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga