Gluon condensation and scaling exponents for the propagators in Yang-Mills theory

We investigate the infrared (strong-coupling) regime of SU(N)-Yang-Mills theory on a self-dual background. We present an evaluation of the full effective potential for the field-strength invariant FμνFμν from nonperturbative gauge correlation functions and find a nontrivial minimum corresponding to...

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Hauptverfasser: Eichhorn, Astrid (VerfasserIn) , Gies, Holger (VerfasserIn) , Pawlowski, Jan M. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 15 February 2011
In: Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2011, Jahrgang: 83, Heft: 4
ISSN:1550-2368
DOI:10.1103/PhysRevD.83.045014
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.83.045014
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.83.045014
Volltext
Verfasserangaben:Astrid Eichhorn, Holger Gies, and Jan M. Pawlowski

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520 |a We investigate the infrared (strong-coupling) regime of SU(N)-Yang-Mills theory on a self-dual background. We present an evaluation of the full effective potential for the field-strength invariant FμνFμν from nonperturbative gauge correlation functions and find a nontrivial minimum corresponding to the existence of a dimension four gluon condensate in the vacuum. We also relate the infrared asymptotic form of the β function of the running background-gauge coupling to the asymptotic behavior of Landau-gauge gluon and ghost propagators. Consistency between both gauges in the infrared imposes a new upper bound on the infrared exponents of the propagators. For the scaling solution, this bound reads κc<23/38 which, together with Zwanziger’s horizon condition κc>1/2, defines a rather narrow window for this critical exponent. Current estimates from functional methods indeed satisfy these bounds. 
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