Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nucleon in a periodic magnetic field: Finite-volume aspects   The paper presents an extension and a refinement of our previous work on the
extraction of the doubly virtual forward Compton scattering amplitude on the
lattice by using the background field technique, Phys. Rev. D 95, 031502 (2017)
(arXiv:1610.05545). The zero frequency limit for the periodic background field
is discussed, in which the well-known result is reproduced. Further, an upper
limit for the magnitude of the external field is established for which the
perturbative treatment is still possible. Finally, the framework is set for the
evaluation of the finite-volume corrections allowing for the analysis of
upcoming lattice results.

10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
19
The categories of this paper are: eess
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph