Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Property of cn - nbar cbar System in U(12)-Scheme and X(3872),Y(3940)   The properties of four quark cn - nbar cbar states are investigated as cn
di-quark and nbar cbar di-antiquark system in U(12)-classification scheme of
hadrons. We consider the negative-parity di-quark and di-antiquark in ground
states, and the properties of X(3872) and Y(3940) are consistent, respectively,
with those of the JPC=1++ and 2++ states from these negative-parity di-quark
and di-antiquark. Their narrow-widths are explained from an orthogonality of
spinor wave functions. The properties of ground-state cs - sbar cbar system are
also predicted in this scheme.

10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: nlin
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex