Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CPT-Violating, Massive Photons and Cherenkov Radiation   CPT-Violating photons are well-known to have problems with energy positivity
in certain cases and therefore have not been convincingly quantized to date. We
find that by adding a small mass term, consistent with experimental bounds, the
theory can be regulated and allows for a consistent covariant quantization
procedure. This new framework is applied to a consistent quantum calculation of
vacuum Cherenkov radiation rates. These rates turn out to be largely
independent of the mass of the photon regulator used. In the physical regime,
accessible by ultra high energy cosmic rays, the behavior of the rate is
proportional to the square of the CPT-violating parameter and is not
realistically observable.

13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
18
The categories of this paper are: econ
1
The categories of this paper are: cs