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arXiv · 2510.17766

Higher-order corrections for $t{\bar t}Z$ production

Nikolaos Kidonakis·Chris Foster
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Abstract

We present calculations of higher-order QCD and electroweak (EW) corrections to the associated production of a top-antitop quark pair and a $Z$ boson, i.e. $t{\bar t}Z$ production, in proton collisions. We find that the contributions from soft-gluon corrections are numerically dominant and large. We present approximate NNLO (aNNLO) and approximate N$^3$LO (aN$^3$LO) cross sections that include soft corrections on top of the exact NLO QCD result. We also add electroweak corrections through NLO. We compare our aN$^3$LO QCD + NLO EW theoretical results to measurements of total cross sections from the LHC, and we also calculate top-quark differential distributions in transverse momentum and rapidity.

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Nikolaos Kidonakis, Chris Foster. 2025-10-20. Higher-order corrections for $t{\bar t}Z$ production. https://arxiv.org/abs/2510.17766

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