Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: QCD sum rules for the nucleon and the non-locality of quark condensates   We emphasize the role of the x dependence of the quark condensate <|\bar
q(0)q(x)|> originated by the zero fermion modes in the instanton vacuum. The
effect is not negligible since the inverse size of the instanton 1/\rho~600MeV
is comparable with the value of Borel mass M~1GeV. Using as an example the sum
rules for the nucleon we show that this "non-locality" may strongly affected
the conventional results obtained under the <|\bar q(0)q(x)|>=<|\bar q(0)q(0)|>
approximation.

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The categories of this paper are: bayes-an
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The categories of this paper are: eess
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
3
The categories of this paper are: physics
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: solv-int