$t \bar t + X$ hadroproduction at NLO accuracy with decay and evolution to the hadron level.

Adam Kardos, Maria Vittoria Garzelli & Zoltan Trocsanyi
We discuss how the hadroproduction of $\mathrm{t\,\bar{t}}$-pairs in association with jets, vector and/or scalar bosons is implemented in the \texttt{PowHel} framework. In this framework matrix elements obtained from the \texttt{HELAC-NLO} package are used to provide predictions of distributions at the hadron level that are correct up to next-to-leading order accuracy in perturbation theory. We also show first predictions for $W^+W^-\mathrm{b\,\bar{b}}$-hadroproduction.