Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-perturbative renormalization of flavor singlet quark bilinear
  operators in lattice QCD   We report on our studies of the renormalization of flavor singlet quark
bilinear operators in lattice QCD. The renormalization constants are determined
non-perturbatively using gauge field ensembles with Nf=2 dynamical clover
improved fermions. The renormalization is performed in the RI'-MOM scheme. The
difference between flavor singlet and non-singlet quark bilinear operators is a
disconnected contribution, which has to be evaluated by stochastic estimators.
We compare our results for the running with perturbation theory.

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The categories of this paper are: math
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: comp-gas