$t\bar{t}jj$ -- NLO QCD corrections to top quark pair production and decays at the LHC

TL;DR

This paper calculates next-to-leading order QCD corrections for top quark pair production with two jets at the LHC, including decay effects and jet radiation, improving theoretical precision for these processes.

Contribution

It provides the first comprehensive NLO QCD correction calculation for $pp\to t\bar{t}jj$ with top decays and spin correlations, including production and decay radiation effects.

Findings

NLO corrections significantly affect cross section predictions.

Theoretical uncertainties are quantified at both integrated and differential levels.

Jet radiation contributions are analyzed in production and decay stages.

Abstract

In these proceedings we present the calculation of NLO QCD corrections to $pp\to t\bar{t}jj$ in the dilepton decay channel. The narrow width approximation is used to model the decays of the top quark pair preserving spin correlations. Jet radiation and QCD corrections are consistently included in the production and decay of the top quarks. We discuss the size of NLO QCD corrections and the main theoretical uncertainties of fiducial cross sections at the integrated and differential level. In addition, we examine the contributions of jet radiation in the production and decay of the top-quark pair, as well as of a mixed configuration where jet radiation is present simultaneously in the production and decay stages.