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On gluon and ghost propagators in linear covariant gauges

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arxiv 1502.04057 v2 pith:UGNIED4Q submitted 2015-02-13 hep-ph

Markus Q. Huber This is my paper · ORCID
classification hep-ph
keywords gluonghostcovariantdressingfunctiongaugegaugeslinear
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abstract

We compute the gluon and ghost propagators of Yang-Mills theory in linear covariant gauges from the coupled system of Dyson-Schwinger equations. For small values of the gauge fixing parameter $\xi\sim 0.1$, the deviations to the Landau gauge already become clearly visible. For the ghost dressing function, this is reflected in a logarithmic infrared suppression. Also, the gluon dressing function changes - but only quantitatively - and the gluon propagator remains finite at zero momentum. From the results, a running coupling is extracted.

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