Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrodynamics in the zero-point field: on the equilibrium spectral
  energy distribution and the origin of inertial mass   Attempts at an electromagnetic explanation of the inertial mass of charged
particles have recently been revived within the framework of Stochastic
Electrodynamics, characterized by the adoption of a classical version of the
electromagnetic zero-point field (ZPF). Recent claims of progress in that area
have to some extent received support from related claims that the classical
equilibrium spectrum of charged matter is that of the classically conceived
ZPF. The purpose of this note is to suggest that some strong qualifications
should accompany these claims. It is pointed out that a classical massless
charge cannot acquire mass from nothing as a result of immersion in any EM
field, and therefore that the ZPF alone cannot provide a full explanation of
inertial mass. Of greater concern, it is observed that the peculiar
circumstances under which classical matter is in equilibrium with the ZPF do
not concur with observation.

16
The categories of this paper are: stat
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph