Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Extraction of hadron-hadron potentials on the lattice within 2+1
  dimensional QED   A potential between mesons is extracted from 4-point functions within lattice
gauge theory taking 2+1 dimensional QED as an example. This theory possesses
confinement and dynamical fermions. The resulting meson-meson potential has a
short-ranged hard repulsive core due to antisymmetrization. The expected
dipole-dipole forces lead to attraction at intermediate distances. Sea quarks
lead to a softer form of the total potential.

7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
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
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an