Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quark Propagation in the Presence of a A_\mu^aA_a^\mu> Condensate   There is a good deal of current interest in the condensate g^2A_\mu^aA_a^\mu>
which has recently be shown to be the Landau gauge version of a more general
gauge-invariant expression. In the present work we consider quark propagation
in the presence of such a condensate which we assume to be present in the
vacuum. We describe the vacuum as a random medium of gluon fields. We discuss
quark propagation in that medium and show that the quark propagator has no
on-mass-shell pole indicating that a quark cannot propagate over extended
distances. That is, the quark is a nonpropagating mode in the gluon condensate.

15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an