The gauge dependence of some fermion bilinear RI/MOM renormalization constants is studied by comparing data which have been gauge-fixed in two different realizations of the Landau gauge and in a generic covariant gauge. The very good agreement between the various sets of results and the theory indicates that the numerical uncertainty induced by the lattice gauge-fixing procedure is below the statistical errors of our data sample which is of the order of (1-1.5)%.
@article{arxiv.hep-lat/0209102,
title = {Numerical Exploration of the RI/MOM Scheme Gauge Dependence},
author = {L. Giusti and S. Petrarca and B. Taglienti and N. Tantalo},
journal= {arXiv preprint arXiv:hep-lat/0209102},
year = {2009}
}