$t\bar{t}b\bar{b}$ predictions at NLO in QCD and $b$-jet modelling

TL;DR

This paper provides advanced NLO QCD predictions for the fully decayed $tar{t}bar{b}$ process, including off-shell effects and $b$-jet modeling, crucial for accurate background estimation in top quark studies.

Contribution

It presents the first comprehensive NLO QCD predictions for the fully decayed $tar{t}bar{b}$ process with off-shell effects and detailed $b$-jet analysis.

Findings

NLO QCD corrections significantly affect the $tar{t}bar{b}$ predictions.

Off-shell effects impact the kinematic distributions.

Insights into the nature of $b$-jets in the final state.

Abstract

In this contribution we report on the latest theoretical predictions for $t\bar{t}b\bar{b}$. These results are obtained for the fully decayed final state $pp \rightarrow e^+ \nu_e \mu^- \nu_{\mu} b \bar{b} b \bar{b}$ at next-to-leading order accuracy in QCD. We present predictions with full off-shell effects and in the Narrow Width Approximation. Specifically, we report on the size of the NLO QCD corrections and the size of the full off-shell effects. Finally, we study the nature of the $b$-jets present in the final state.