Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-precision description and new properties of a spin-1 particle in a
  magnetic field   The exact Foldy-Wouthuysen Hamiltonian is derived for a pointlike spin-1
particle with a normal magnetic moment in a nonuniform magnetic field. For a
uniform magnetic field, it is exactly separated into terms linear and quadratic
in spin. New unexpected properties of a particle with an anomalous magnetic
moment are found. Spin projections of a particle moving in a uniform magnetic
field are not integer and the tensor polarization is asymmetric in the plane
orthogonal to the field. Previously described spin-tensor effects caused by the
tensor magnetic polarizability exist not only for nuclei but also for pointlike
particles.

20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph