Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Prompt Charmonium Production in Z Decays   The color-evaporation model quantitatively describes all data on
photoproduction and hadroproduction of charmonium. Although the model is in
part nonperturbative, the associated parameters can for instance be determined
from the charmonium photoproduction data. At this point its predictions for the
prompt production of $\psi$'s at the $Z$ pole are made with no free parameters.
We show here that this approach successfully describes all data on the
production of prompt $\psi$'s in $Z$ decays.

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The categories of this paper are: cs
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The categories of this paper are: bayes-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-bio
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The categories of this paper are: solv-int
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg