Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear bound state of eta'(958) and partial restoration of chiral
  symmetry in the eta' mass   The in-medium mass of the $\eta^{\prime}$ meson is discussed in a context of
partial restoration of chiral symmetry in nuclear medium. The $\eta^{\prime}$
mass is expected to be reduced by order of 100 MeV at the saturation density.
The reduction is a consequence of the suppression of the anomaly effect on the
$\eta^{\prime}$ mass induced by partial restoration of chiral symmetry. This
strong attraction in $\eta^{\prime}$ nuclear systems does not accompany large
absorption of $\eta^{\prime}$ into nuclear matter. This leads to the
possibility of so narrow bound states of the $\eta^{\prime}$ meson in nuclei to
be seen in hadronic reactions with light nuclear targets.

8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci