Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pentaquarks: Review on Models and Solitonic Calculations of Antidecuplet
  Magnetic Moments   After a quick look at the present status of experiments we shortly review in
a first step the ongoing discussions on some of the basic theoretical
approaches to pentaquarks: Chiral solitons, Large-$N_c$ considerations, quark
models, and lattice gauge approaches. In a second step we apply the chiral
quark-soliton approach including linear $m_s$-corrections to the calculation of
magnetic moments of the baryons of the anti-decuplet. In this approach the
parameters are fixed solely by experimental data for the magnetic moments of
the baryon octet and for the masses of the octet, decuplet and of $\Theta^{+}$.
The magnetic moment of $\Theta^{+}$ depends rather strongly on the pion-nucleon
sigma term and reads $-1.19 {\rm n.m.}$ to $-0.33 {\rm n.m.}$ for $\Sigma_{\pi
N} = 45$ and 75 MeV respectively. As a byproduct the strange magnetic moment of
the nucleon is obtained with a value of $\mu^{(s)}_N =+0.39$ n.m.

1
The categories of this paper are: cs
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
2
The categories of this paper are: math
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int