Analysis of systematic errors in the calculation of renormalization   constants of the topological susceptibility on the lattice
  A Ginsparg-Wilson based calibration of the topological charge is used to calculate the renormalization constants which appear in the field-theoretical determination of the topological susceptibility on the lattice. A systematic comparison is made with calculations based on cooling. The two methods agree within present statistical errors (3%-4%). We also discuss the independence of the multiplicative renormalization constant Z from the background topological charge used to determine it. 
B. Alles (Pisa INFN), M. D'Elia (Genoa Univ.), A. Di Giacomo (Pisa   Univ.), C. Pica (Pisa Univ.)