Precise predictions for Higgs production in association with a W-boson pair at ILC

Abstract

Higgs-boson production in association with a W-boson pair at e + e − linear colliders is one of the important processes in probing the coupling between the Higgs boson and vector gauge bosons and discovering the signature of new physics. We describe the impact of the complete electroweak (EW) radiative corrections of \(\mathcal{O}(\alpha_{\mathrm{ew}})\) to this process in the standard model (SM) at the International Linear Collider (ILC), and investigate the dependence of the lowest-order (LO) and EW next-to-leading order (NLO) corrected cross sections on the colliding energy \(\sqrt{s}\) and the Higgs-boson mass. The LO and NLO EW corrected distributions of the invariant mass of the W-boson pair and the transverse momenta of the final W-boson and Higgs boson are presented. Our numerical results show that the relative EW radiative correction (δ ew) varies from −19.4% to 0.2% when m H=120 GeV and \(\sqrt{s}\) grows from 300 GeV to 1.2 TeV.