Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charmonium spectrum and new observed states   The linearity and parallelism of Regge trajectories is combined with a
hyperfine splitting relation in multiplet to study charmonium spectrum. It is
found that predictions to the spectrum of 1D multiplet could be made once
another 1D state is confirmed. The newly observed X(3872), Y(3940), X(3940),
Y(4260) and Z(3930) are studied within the charmonium framework.

9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg