Full off-shell predictions and $b$-jet definitions for $t\bar{t}b\bar{b}$ at NLO in QCD

Abstract

In this proceeding we present predictions for the complete NLO QCD corrections to the production of $t\bar{t}b\bar{b}$ in the dilepton decay channel of the top quark at the LHC with $\sqrt{s}=13$ TeV. The calculation is performed considering all the full off-shell effects. Moreover, the various sources of uncertainty for this process are studied in detail. We then compare these predictions to experimental measurements. We additionally investigate the impact of the $b$-quark initiated subprocesses.

Comments: 6 pages, 2 figures, 3 tables. Contribution to the Proceedings of the 14th International Workshop on Top Quark Physics (videoconference), 13-17 September 2021. Poster