Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A search for non-qqbar mesons at the CERN Omega Spectrometer   The non-Abelian nature of QCD suggests that particles that have a gluon
constituent, such as glueballs or hybrids, should exist. Experiments WA76, WA91
and WA102 have performed a dedicated search for these states in central
production using the CERN Omega Spectrometer. Several non-qqbar candidates have
been observed. This paper presents a study of central meson production as a
function of the difference in transverse momentum (dPT) of the exchanged
particles which shows that undisputed qqbar mesons are suppressed at small dPT
whereas the glueball candidates are enhanced.

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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys