Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermi-Dirac Correlations in Z^{0} \to ppX at LEP   The DELPHI and ALEPH experiments have released new results of the Fermi-Dirac
correlations for pp (\bar{p} \bar{p}) and Bose-Einstein correlations for K^0_s
K^0_s. Both experiments measure very small source radius for protons R \sim 0.1
fm. The source dimension for K^0_s K^0_s is in agreement with the previous
measurements for K^+ K^-, K^0_s K^0_s. These results, together with earlier LEP
measurements, establish the dependence of the correlation radius on the hadron
mass. This paper discusses some of the attempts to describe this phenomenon.

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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: stat
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-th
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The categories of this paper are: cs
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci