Electroweak and QCD corrections to top-pair hadroproduction in association with heavy bosons

TL;DR

This paper calculates higher-order electroweak and QCD corrections to top-antitop pair production with heavy bosons at various collider energies, enhancing the precision of theoretical predictions.

Contribution

It provides a comprehensive computation of mixed QCD and electroweak corrections at next-to-leading order for top-pair plus heavy boson production using automated tools.

Findings

Corrections significantly affect cross section predictions.

Results are relevant for current and future collider energies.

Enhanced theoretical precision for top-associated heavy boson production.

Abstract

We compute the contribution of order $\alpha_S^2\alpha^2$ to the cross section of a top-antitop pair in association with at least one heavy Standard Model boson -- $Z$, $W^\pm$, and Higgs -- by including all effects of QCD, QED, and weak origin and by working in the automated MadGraph5_aMC@NLO framework. This next-to-leading order contribution is then combined with that of order $\alpha_S^3\alpha$, and with the two dominant lowest-order ones, $\alpha_S^2\alpha$ and $\alpha_S\alpha^2$, to obtain phenomenological results relevant to a 8, 13, and 100~TeV $pp$ collider.