Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spectra and decays of hybrid charmonia   QCD string model is employed to calculate the masses and spin splittings of
lowest charmonium hybrid states with a magnetic gluon. Relative decay rates
into various S- and P-wave D-meson pairs are calculated for these hybrids.

27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
17
The categories of this paper are: q-fin
8
The categories of this paper are: hep-ex
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol