Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiative corrections to the magnetic moments of the proton and the
  neutron   We estimate the radiative corrections of order $\alpha/\pi$ to the magnetic
moments of the proton and the neutron. The photon-loop diagram of the
vertex-correction type is evaluated with phenomenological nucleon vector form
factors. Infrared-finiteness and gauge-invariance require the inclusion of the
wave-function renormalization factor from the self-energy diagram. Using recent
empirical form factor parametrizations the corrections amount to
$\delta\kappa_p= -3.42 \cdot 10^{-3}$ and $\delta\kappa_n= 1.34 \cdot 10^{-3}$.
We study also the effects from photon-loops with internal
$\Delta(1232)$-isobars. For two customary versions of the $\Delta N\gamma
$-vertex and spin-3/2 propagator, these radiative corrections have values of
$\delta\kappa_p^{(\Delta)}= (-0.9,\, 0.0)\!\cdot\! 10^{-3}$ and
$\delta\kappa_n^{(\Delta)} = (1.2,\,-0.8)\!\cdot\! 10^{-3}$, respectively.

31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol