Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the consistency of Lorentz invariance violation in QED induced by
  fermions in constant axial-vector background   We show for the first time that the induced parity--even Lorentz invariance
violation can be unambiguously calculated in the physically justified and
minimally broken dimensional regularization scheme, suitably tailored for a
spontaneous Lorentz symmetry breaking in a field theory model. The quantization
of the Lorentz invariance violating quantum electrodynamics is critically
examined and shown to be consistent either for a light--like cosmic anisotropy
axial--vector or for a time--like one, when in the presence of a bare photon
mass.

31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex