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High Energy Physics - Phenomenology

arXiv:1503.05106 (hep-ph)
[Submitted on 17 Mar 2015]

Title:The two-, three- and four-gluon sector of QCD in the Landau gauge

Authors:Daniele Binosi
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Abstract:Due to the nonperturbative masslessness of the ghost field, ghost loops that contribute to gluon Green's functions in the Landau gauge display infrared divergences, akin to those one would encounter in a conventional perturbative treatment. This is in sharp contrast with gluon loops, in which the perturbative divergences are tamed by the dynamical generation of a gluon mass acting as an effective infrared cutoff. In this paper, after reviewing the full nonperturbative origin of this divergence in the two-gluon sector, we discuss its implications for the three- and four-gluon sector, showing in particular that some of the form factors characterizing the corresponding Green's functions are bound to diverge in the infrared.
Comments: 13 pages, 7 figures. Talk given at Discrete 2014 - Fourth Symposium on Prospects in the Physics of Discrete Symmetries. 2-6 December, 2014 - King's College, London, England
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1503.05106 [hep-ph]
  (or arXiv:1503.05106v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1503.05106
Related DOI: https://doi.org/10.1088/1742-6596/631/1/012066

Submission history

From: Daniele Binosi [view email]
[v1] Tue, 17 Mar 2015 16:00:19 UTC (810 KB)
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