Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized Dirac-Pauli equation and spin light of neutrino in
  magnetized matter   We consider propagation of a massive neutrino in matter within the quantum
approach based on the two equations for the neutrino field: the first one is
the Dirac-Pauli equation for a massive neutrino in an external magnetic field
generalized on the inclusion of effects of the background matter; the second
one is the modified Dirac equation derived directly from the neutrino-matter
interaction Lagrangian. On the basis of these two equations the quantum theory
of a neutrino moving in the background matter is developed (the exact solutions
of these equations are found and classified over the neutrino spin states, the
corresponding energy spectra are also derived). Using these solutions we study
within the quantum approach the spin light of neutrino ($SL\nu$) in matter with
the effect of a longitudinal magnetic field being also incorporated. In
particular, the $SL\nu$ radiation rate and total power are derived. The use of
the generalized Dirac-Pauli equation also enables us to consider the $SL\nu$ in
matter polarized under the influence of strong magnetic field.

22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg