$t{Z}^{\prime }$ production at hadron colliders

Abstract

We study the production of a single top quark in association with a heavy extra $Z^{\prime }$ 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 $t{Z}^{\prime }$ production. The impact of the uncertainties due to the structure of the proton and scale dependence is also analyzed.

Comments: 35 pages, 23 figures, regular article; published version of the manuscript appearing in Eur. Phys. J. C 80, 467 (2020)