Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-Action Effects In the Theory of Classical Spinning Charge   The back-reaction effects for the spinning charge moving through the constant
homogeneous electromagnetic field are studied in the context of the mass-shift
(MS) method. For the g=2 magnetic moment case we find the (complex) addition to
the classical action. Its dependence on the integrals of the unperturbed motion
proves to be important in determination of the orbital radiation effects and
could assist in understanding the radiation polarization (RP) phenomenon.

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The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga