Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twenty Years of Diffraction at the Tevatron   Results on diffractive particle interactions from the Fermilab Tevatron
pbar-p collider are placed in perspective through a QCD inspired
phenomenological approach, which exploits scaling and factorization properties
observed in data. The results discussed are those obtained by the CDF
Collaboration from a comprehensive set of single, double, and multigap soft and
hard diffraction processes studied during the twenty year period since 1985,
when the CDF diffractive program was proposed and the first Blois Workshop was
held.

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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
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The categories of this paper are: math-ph
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
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The categories of this paper are: eess