Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the QCD coupling behavior in the infrared region   The summary of nonperturbative results for the QCD invariant coupling
bar{alpha}_s obtained by lattice simulations for functional integral and by
solution of approximate Dyson--Schwinger equations reveals a puzzling variety
of IR behavior of bar{alpha}_s(Q^2) even on a qualitative level. This, in turn,
rises a question of correspondence between the results obtained so far by
different groups.
  We analyze this issue in terms of mass-dependent coupling constant
transformations and conclude that the question of the IR behavior of effective
QCD coupling and of propagators is not a well--defined one and needs to be more
specified.

19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph