Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetic dipole moment of the S11(1535) from the \gamma p \to \gamma
  \eta p reaction   The \gamma p \to \gamma \eta p reaction in the S11(1535) resonance region is
investigated as a method to access the S11(1535) magnetic dipole moment. To
study the feasibility, we perform calculations of the \gamma p \to \gamma \eta
p process within an effective Lagrangian approach containing both the S11
resonant mechanism and a background of non-resonant contributions. Predictions
are made for the forthcoming experiments. In particular, we focus on the
sensitivity of cross sections and photon asymmetries to the S11(1535) magnetic
dipole moment.

16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ