Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Eta-prime bound states in nuclei and partial restoration of chiral
  symmetry   We discuss the in-medium mass of the eta-prime meson under partial
restoration of chiral symmetry. The chiral SU(3)\otimes SU(3) symmetry tells us
the flavor singlet pseudoscalar meson eta-prime should degenerate with the
octet $\eta$ meson in the SU(3) flavor limit, when chiral symmetry is restored
in spite of U(1)A anomaly in the flavor single axial current. The suppression
of the anomaly effect induces an order of 100 MeV reduction for the eta-prime
mass at the saturation density without introducing a large absorption width. We
show the formation spectrum of the eta-prime mesonic bound state in a nucleus
as a possible observation of the eta-prime mass reduction.

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The categories of this paper are: stat
1
The categories of this paper are: cs
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: econ
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The categories of this paper are: eess
10
The categories of this paper are: q-bio