Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Renormalization of the topological charge density in QCD with
  dimensional regularization   To all orders of perturbation theory, the renormalization of the topological
charge density in dimensionally regularized QCD is shown to require no more
than an additive renormalization proportional to the divergence of the
flavour-singlet axial current. The proof is based on the standard BRS analysis
of the QCD vertex functional in the background gauge and exploits the special
algebraic properties of the charge density through the Stora--Zumino chain of
descent equations.

25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat