Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Massive and Massless Scalar Field and Confinement   Generalization of QCD motivated classical SU(2) Yang--Mills theory coupled to
the scalar field is discussed. The massive scalar field, corresponding the
scalar glueball, provides a confining potential for static, point-like,
external sources. In case of massless scalar field screening solutions are
found. However, there is a confining sector as well. Both, massive and massless
confining solutions are compared with phenomenological potentials. The case of
non-dynamical permittivity is also discussed.

27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
19
The categories of this paper are: eess