Top Pair Production with a jet with NLO QCD off-shell effects

TL;DR

This paper presents a next-to-leading order QCD calculation for top pair production with a jet at the LHC, including off-shell effects and interferences, showing improved theoretical precision and reduced scale dependence.

Contribution

It provides the first NLO QCD computation for e+ ve mu- v_mu bb~ j including all off-shell and interference effects, enhancing accuracy of theoretical predictions.

Findings

Significant reduction in scale dependence observed.

Results include both integrated and differential cross sections.

Calculation performed at 8 TeV LHC energy.

Abstract

A brief summary of the recent next-to-leading order QCD calculation for e+ ve mu- v_mu bb~ j at the LHC is given. Our computation includes all non-resonant contributions, off-shell effects and interferences for top-quarks and W gauge bosons. Some results for integrated and differential cross sections are shown for the LHC Run1 energy of 8 TeV. A significant reduction of the scale dependence is observed, which indicates that the perturbative expansion is well under control. The results are obtained in the framework of the HELAC-NLO system.