ZH production in gluon fusion at NLO in QCD

TL;DR

This paper provides detailed next-to-leading order QCD calculations for Higgs and Z boson production via gluon fusion, including full top-quark mass effects and an analysis of mass scheme uncertainties at high transverse momentum.

Contribution

It introduces a fully differential NLO QCD calculation for Higgs-Z production in gluon fusion with full top-quark mass dependence and high-energy expansion techniques.

Findings

Numerical two-loop virtual contributions evaluated with sector decomposition.

Inclusion of full top-quark mass effects in differential results.

Analysis of top-quark mass scheme uncertainties at high transverse momentum.

Abstract

We present fully differential next-to-leading order results for Higgs production in association with a $Z$ boson in gluon fusion. Our two-loop virtual contributions are evaluated numerically using sector decomposition, including full top-quark mass effects, and supplemented at high $p_T$ by an analytic high-energy expansion to order ($m_Z^4, m_H^4, m_t^{32}$). Using the expanded results we also present a study of the top-quark mass scheme uncertainty at large $p_T$.