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arXiv · 0711.0936

Gluon mass and freezing of the QCD coupling

A. C. Aguilar·J. Papavassiliou
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Abstract

Infrared finite solutions for the gluon propagator of pure QCD are obtained from the gauge-invariant non-linear Schwinger-Dyson equation formulated in the Feynman gauge of the background field method. These solutions may be fitted using a massive propagator, with the special characteristic that the effective mass employed drops asymptotically as the inverse square of the momentum transfer, in agreement with general operator-product expansion arguments. Due to the presence of the dynamical gluon mass the strong effective charge extracted from these solutions freezes at a finite value, giving rise to an infrared fixed point for QCD.

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A. C. Aguilar, J. Papavassiliou. 2007-11-06. Gluon mass and freezing of the QCD coupling. https://doi.org/10.1088/1742-6596/110/2/022040

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