Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Axion-modified photon propagator, Coulomb potential and Lamb-shift   A consistent renormalization of a quantum theory of axion-electrodynamics
requires terms beyond the minimal coupling of two photons to a neutral
pseudoscalar field. This procedure is used to determine the self-energy
operators of the electromagnetic and the axion fields with an accuracy of
second-order in the axion-diphoton coupling. The resulting polarization tensor
is utilized for establishing the axion-modified Coulomb potential of a static
pointlike charge. In connection, the plausible distortion of the Lamb-shift in
hydrogenlike atoms is established and the scopes for searching axionlike
particles in high-precision atomic spectroscopy and in experiments of
Cavendish-type are investigated. Particularly, we show that these hypothetical
degrees of freedom are ruled out as plausible candidates for explaining the
proton radius anomaly in muonic hydrogen. A certain loophole remains, though,
which is linked to the nonrenormalizable nature of axion-electrodynamics.

23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph