Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancement of the Transition Magnetic Moments of a Neutrino by
  Degenerate Electrons   The one-loop induced magnetic dipole moments of a neutrino are examined in a
background of degenerate electrons in the standard model. For the
nonrelativistic neutrino, they are enhanced by a factor \( (8\pF/3\mnu) \),
where \pF\ is the electron Fermi momentum and \mnu\ the neutrino mass. For the
relativistic neutrino, they enhance the flavor-changing but helicity-conserving
process because of the absence of the GIM cancellation.

36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an