A study of the zero modes of the Faddeev-Popov operator in Euclidean   Yang-Mills theories in the Landau gauge in d=2,3,4 dimensions
  Examples of normalizable zero modes of the Faddeev-Popov operator in SU(2) Euclidean Yang-Mills theories in the Landau gauge are constructed in d=2,3,4 dimensions. 
M. A. L. Capri, M. S. Guimaraes, S. P. Sorella, D. G. Tedesco
hep-th hep-lat hep-ph