  Weak corrections for top-quark pair production at hadron colliders are
revisited. Predictions for collider energies of 8 TeV, adopted to the recent
LHC run, and for 13 as well as 14 TeV, presumably relevant for the next round
of LHC experiments, are presented. Kinematic regions with large momentum
transfer are identified, where the corrections become large and may lead to
strong distortions of differential distributions, thus mimicking anomalous top
quark couplings. As a complementary case we investigate the threshold region,
corresponding to configurations with small relative velocity between top and
antitop quark, which is particularly sensitive to the top-quark Yukawa
coupling. We demonstrate, that nontrivial upper limits on this coupling,
complementary to those recently derived by the CMS and the ATLAS collaorations,
are well within reach of ongoing experiments. In addition we suggest a
prescription that allows the implementation of these corrections in current
Monte Carlo generators. Furthermore, the weak corrections have been included in
the publicly available Hathor library. The numerical results presented in this
article use the same setup as the recently calculated NNLO QCD corrections. The
results can thus be combined to give the most precise theoretical predictions.
