Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unphysical properties of the static quark-antiquark four-point
  correlator in Landau gauge   We consider the four point connected correlator representing a static
quark-antiquark pair separated by a spatial distance R, propagating for a
Euclidean time T. This function is computed by lattice Monte Carlo in SU(2)
pure gauge theory at lattice couplings $\beta=2.2$ and $\beta=2.5$ in both
Coulomb and Landau gauges. The Coulomb gauge correlator is well behaved, and is
dominated at large T by a state whose energy grows linearly as $\sigma R$, with
$\sigma$ the known asymptotic string tension. The connected correlator in
Landau gauge behaves differently. At intermediate R there is clear evidence of
a linear potential, but the corresponding string tension extrapolates to zero
at large T. At large R the connected correlator becomes negative; moreover
there are strong finite size effects. These numerical results suggest that
unphysical states dominate the large Euclidean time behavior of this Landau
gauge correlator.

21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics