Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Yang-Mills propagators in linear covariant gauges from Nielsen
  identities   We calculate gluon and ghost propagators in Yang-Mills theory in linear
covariant gauges. To that end, we utilize Nielsen identities with Landau gauge
propagators and vertices as the starting point. We present and discuss
numerical results for the gluon and ghost propagators for values of the gauge
parameter $0<\xi \le 5$. Extrapolating the propagators to $\xi \to \infty $ we
find the expected qualitative behavior. We provide arguments that our results
are quantitatively reliable at least for values $\xi\lesssim 1/2$ of the gauge
fixing parameter. It is shown that the correlation functions, and in particular
the ghost propagator, change significantly with increasing gauge parameter. In
turn, the ghost-gluon running coupling as well as the position of the zero
crossing of the Schwinger function of the gluon propagator remain within the
uncertainties of our calculation unchanged.

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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int