Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite Volume Dependence of the Quark-Antiquark Vacuum Expectation Value   A general formula is derived for the finite volume dependence of vacuum
expectation values analogous to Luscher's formula for the masses. The result
involves no integrals over kinematic quantities and depends only on the matrix
element between pions at zero momentum transfer thus presenting a new way to
calculate the latter, i.e. pion sigma terms.
  The full order $p^6$ correction to the vacuum condensate $<\bar q q>$ is
evaluated and compared with the result from the Luscher formula. Due to the
size of the $p^6$ result no conclusion about the accuracy of the Luscher
formula can be drawn.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio