  We make use of recent results in effective theory and higher-order
perturbative calculations to improve the theoretical predictions of the QCD
contribution to the top-quark pair production forward-backward asymmetry at the
Tevatron. In particular, we supplement the fixed-order NLO calculation with
higher-order corrections from soft gluon resummation at NNLL accuracy performed
in two different kinematic schemes, which allows us to make improved
predictions for the asymmetry in the $p\bar p$ and $t\bar t$ rest frames as a
function of the rapidity and invariant mass of the $t\bar t$ pair. Furthermore,
we provide binned results which can be compared with the recent measurements of
the forward-backward asymmetry in events with a large pair invariant mass or
rapidity difference. Finally, we calculate at NLO+NNLL order the top-quark
charge asymmetry at the LHC as a function of a lower rapidity cut-off for the
top and antitop quarks.

High Energy Physics - Phenomenology