Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lorentz and CPT tests with charge-to-mass ratio comparisons in Penning
  traps   Applications of the general theory of quantum electrodynamics with Lorentz-
and CPT-violating operators of mass dimensions up to six are presented to
Penning-trap experiments comparing charge-to-mass ratios between particles and
antiparticles. Perturbation theory is used to derive Lorentz- and CPT-violating
contributions to the energy levels and cyclotron frequencies of confined
particles and antiparticles. We show that whether the experimental {\it
interpreted} quantity $(|q|/m)_{\overline{w}}/(|q|/m)_{w} - 1$ is a clean
measure of a CPT test depends on the context of the relevant theory. Existing
experimental results of charge-to-mass ratio comparisons are used to obtain
first-time constraints on 69 coefficients for Lorentz and CPT violation.

31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat