Weak corrections to gluon-induced top-antitop hadro-production (vol 639, pg 513, 2006)

This is an Erratum to a Letter of ours [S. Moretti, M.R. Nolten, D.A. Ross, Phys. Lett. B 639 (2006) 513]. After its publication, we have discovered a mistake in a numerical program that affects the results presented therein. We provide here the corrected version. (C) 2007 Elsevier B.V. All rights reserved.