Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An Abelian effective action reproducing screening and confinement in
  quenched SU(2) QCD   In an Abelian projection SU(2) gluodynamics contains Abelian gauge fields
(diagonal degrees of freedom) and Abelian matter fields (off-diagonal degrees).
The matter fields are essential for the breaking of the adjoint string. We
obtain numerically the effective action of the Abelian fields in quenched SU(2)
QCD and show that the Abelian matter fields provide an essential contribution
to the total action even in the infrared region.

22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg