Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Plasma induced fermion spin-flip conversion f_L -> f_R + gamma   The fermion spin-flip conversion f_L -> f_R + gamma is considered, caused by
the difference of the additional energies of the electroweak origin, acquired
by left- and right-handed fermions (neutrino, electron) in medium. An accurate
taking account of the fermion and photon dispersion in medium is performed. It
is shown that the threshold arises in the process, caused by the photon
(plasmon) effective mass. This threshold leaves no room for the so-called
``spin light of neutrino'' and ``spin light of electron'' in the real
astrophysical situations.

22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio