Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Critical Hopping Parameter in O(a) improved Lattice QCD   We calculate the critical value of the hopping parameter, $\kappa_c$, in O(a)
improved Lattice QCD, to two loops in perturbation theory. We employ the
Sheikholeslami-Wohlert (clover) improved action for Wilson fermions.
  The quantity which we study is a typical case of a vacuum expectation value
resulting in an additive renormalization; as such, it is characterized by a
power (linear) divergence in the lattice spacing, and its calculation lies at
the limits of applicability of perturbation theory.
  The dependence of our results on the number of colors $N$, the number of
fermionic flavors $N_f$, and the clover parameter $c_{SW}$, is shown
explicitly. We compare our results to non perturbative evaluations of
$\kappa_c$ coming from Monte Carlo simulations.

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The categories of this paper are: chem-ph
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The categories of this paper are: stat
4
The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: astro-ph