On the leading OPE corrections to the ghost-gluon vertex and the Taylor theorem

Ph. Boucaud, D. Dudal, J. P. Leroy, O. Pène, J. Rodríguez-Quintero
2011 Journal of High Energy Physics  
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 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 lattice data.
doi:10.1007/jhep12(2011)018 fatcat:u5peirz54fhd5dg4j3dxutisxq