  We simulate the hadroproduction of a top-antitop pair in association with a
bottom-antibottom pair at 14 TeV LHC using the PowHel package. We use the
generated events, stored according to the Les-Houches event format, to make
predictions for differential distributions formally at the next-to-leading
order (NLO) accuracy and we compare these to existing predictions accurate at
NLO.
