Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Have Gluonic Excitations Been Found?   New experimental information on the non-exotic J^PC = 0^-+ isovector seen at
1.8 GeV by VES yields convincing evidence of its excited gluonic (hybrid)
nature when a critical study of alternative quarkonium assignments is made in
the context of ^3 P_0 decay by flux-tube breaking. Production of this gluonic
excitation via meson exchange is promising, although its two photon production
vanishes.

28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th