Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The $\eta'N$ interaction from a chiral effective model and $\eta'$-$N$
  bound state   The $\eta'$ mass reduction in the nuclear medium is expected from the
degeneracy of the pseudoscalar-singlet and octet mesons when chiral symmetry is
manifest. In this study, we investigate the $\eta'N$ 2body interaction which is
the foundation of the in-medium $\eta'$ properties using the linear sigma model
as a chiral effective model. The $\eta'N$ interaction in the linear sigma model
comes from the scalar meson exchange with U$_A$(1) symmetry effect and is found
to be fairly strong attraction. Moreover, the $\eta N$ transition is included
in our calculation, and is important for the imaginary part of the
$\eta'$-optical potential. The transition amplitude of $\eta'N$ to the $\eta N$
channel is relatively small compared to that of elastic channel. From the
analysis of the $\eta'N$ 2body system, we find a $\eta'N$ bound state with the
binding energy $12.3-3.3i$MeV. We expect that this strongly attractive two body
interaction leads to a deep and attractive optical potential.

21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys