Top quark pair production in association with a Z-boson at NLO accuracy

TL;DR

This paper provides NLO accurate predictions for top quark pair production with an associated Z boson, utilizing advanced computational tools to improve the precision of theoretical cross section estimates.

Contribution

The study introduces NLO calculations for t-tbar plus Z production using HELAC-Oneloop and POWHEG-Box, enhancing the accuracy of theoretical predictions in this process.

Findings

NLO cross section predictions for t-tbar + Z production.

Implementation of subtraction method in POWHEG-Box.

Validation of computational approach with existing methods.

Abstract

We present predictions for the production cross section of t-quark pair production in association with a Z boson at the next-to-leading order (NLO) accuracy using matrix elements obtained from the HELAC-Oneloop package. We use the subtraction method for computing the radiative corrections as implemented in the POWHEG-Box, which was also used in several other computations of similar complexity.