On the leading OPE corrections to the ghost-gluon vertex and the Taylor theoremReport as inadecuate




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Journal of High Energy Physics

, 2011:18

First Online: 05 December 2011Received: 20 September 2011Revised: 08 November 2011Accepted: 22 November 2011 Abstract

This brief note is devoted to a study of genuine non-perturbative corrections to the Landau gauge ghost-gluon vertex in terms of the non-vanishing dimension-two gluon condensate. We prove these corrections to give account of current SU2 lattice data for the vertex with different kinematical configurations in the domain of intermediate momenta, roughly above 2-3 GeV. We pay special attention to the kinematical limit which the bare vertex takes for its tree-level expression at any perturbative order, according to the well-known Taylor theorem. Based on our OPE analysis, we also present a simple model for the vertex, in acceptable agreement with the lattice data also in the IR domain.

KeywordsNonperturbative Effects Sum Rules QCD Lattice QCD ArXiv ePrint: 1109.3803

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Author: Ph. Boucaud - D. Dudal - J. P. Leroy - O. Pène - J. Rodríguez-Quintero

Source: https://link.springer.com/



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