# $tZ'$ production at hadron colliders

## TL;DR

This paper investigates the production of a top quark with a heavy $Z'$ boson at hadron colliders, employing advanced QCD techniques to compute higher-order corrections and analyze uncertainties.

## Contribution

It introduces a detailed calculation of $t Z'$ production including higher-order QCD corrections and uncertainty analysis in models with potential flavor-changing neutral currents.

## Key findings

- Higher-order QCD corrections significantly affect cross section predictions.
- Uncertainty analysis highlights the impact of proton structure and scale choices.
- Results provide more precise predictions for $t Z'$ production at colliders.

## Abstract

We study the production of a single top quark in association with a heavy extra $Z'$ at hadron colliders in new physics models with and without flavor-changing neutral-current (FCNC) couplings. We use QCD soft-gluon resummation and threshold expansions to calculate higher-order corrections for the total cross section and transverse-momentum distributions for $t Z'$ production. The impact of the uncertainties due to the structure of the proton and scale dependence is also analyzed.