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 SU(2) 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.
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Boucaud, P., Dudal, D., Leroy, J.P. et al. On the leading OPE corrections to the ghost-gluon vertex and the Taylor theorem. J. High Energ. Phys. 2011, 18 (2011). https://doi.org/10.1007/JHEP12(2011)018
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DOI: https://doi.org/10.1007/JHEP12(2011)018