Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonstrange baryonia   The relativistic six-quark equations including the $u$, $d$ quarks and
antiquarks are found. The nonstrange baryonia $B \bar B$ are constructed
without the mixing of the quarks and antiquarks. The relativistic six-quark
amplitudes of the baryonia are calculated. The poles of these amplitudes
determine the masses of baryonia. 15 masses of baryonia are predicted. The mass
of baryonium with the spin-parity $J^P=0^-$ $M=1835\, MeV$ is used as a fit.

12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con