Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tests of CPT and Lorentz Symmetry in Penning-Trap Experiments   This talk discusses the sensitivity of electron-positron and
proton-antiproton Penning-trap experiments to CPT- and Lorentz-violating
effects in the context of an extension of the minimal standard model and
quantum electrodynamics.

11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph