NNLO QCD predictions for jet observables in ZH production at electron-positron colliders

TL;DR

This paper provides high-precision NNLO QCD predictions for jet observables in ZH production at electron-positron colliders, considering different Higgs decay modes and jet resolution parameters.

Contribution

It offers the first NNLO QCD calculations for ZH production with detailed decay mode analyses and jet resolution comparisons.

Findings

Differential distributions differ between decay modes.

Results show the impact of jet resolution parameter choices.

Predictions improve the accuracy of collider measurements.

Abstract

We present precise predictions for a variety of jet observables in $ZH$ production at electron-positron colliders, with the $Z$ boson decaying leptonically and the Higgs boson decaying into two hadronic jets, up to NNLO in perturbative QCD. We consider a Higgs boson decaying into bottom (charm) quark pairs via Yukawa interaction and into gluons via an effective vertex in the limit of infinite top quark mass. We present results for the two decay modes separately, highlighting relevant differences in the differential distributions, and for the sum of all decay channels, including a comparison between different choices of the Durham (or $k_T$) jet resolution parameter.