  The Standard Model (SM) prediction of the top quark forward backward
asymmetry is shown to be slightly enhanced by a correction factor of 1.05 due
to electroweak Sudakov (EWS) logarithms of the form (\alpha/sin^2 \theta_W)^n
log^{m< 2n} (s/M_{W,Z}^2). The EWS effect on the dijet and t \bar{t} invariant
mass spectra is significant, reducing the SM prediction by ~20, 10 %
respectively for the highest invariant masses measured at the LHC, and changing
the shape of the high-mass tail of the spectrum. These corrections
significantly affect measurements of the top quark invariant mass spectrum and
the search for an excess of events related to the top quark forward-backward
asymmetry.
