An all-order proof of the equivalence between Gribov's no-pole and Zwanziger's horizon conditions

The quantization of non-Abelian gauge theories is known to be plagued by Gribov copies. Typical examples are the copies related to zero modes of the Faddeev-Popov operator, which give rise to singularities in the ghost propagator. In this work we present an exact and compact expression for the ghost...

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Hauptverfasser: Capri, Márcio André Lópes (VerfasserIn) , Dudal, D. (VerfasserIn) , Guimaraes, M. S. (VerfasserIn) , Palhares, Leticia F. (VerfasserIn) , Sorella, S. P. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 31 Jan 2013
In: Physics letters
Year: 2013, Jahrgang: 719, Heft: 4-5, Pages: 448-453
ISSN:1873-2445
DOI:10.1016/j.physletb.2013.01.039
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.physletb.2013.01.039
Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/1212.2419
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Verfasserangaben:M. A. L. Capri, D. Dudal, M. S. Guimaraes, L. F. Palhares, S. P. Sorella

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520 |a The quantization of non-Abelian gauge theories is known to be plagued by Gribov copies. Typical examples are the copies related to zero modes of the Faddeev-Popov operator, which give rise to singularities in the ghost propagator. In this work we present an exact and compact expression for the ghost propagator as a function of external gauge fields, in SU(N) Yang-Mills theory in the Landau gauge. It is shown, to all orders, that the condition for the ghost propagator not to have a pole, the so-called Gribov's no-pole condition, can be implemented by demanding a nonvanishing expectation value for a functional of the gauge fields that turns out to be Zwanziger's horizon function. The action allowing to implement this condition is the Gribov-Zwanziger action. This establishes in a precise way the equivalence between Gribov's no-pole condition and Zwanziger's horizon condition. 
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