NLO EW and QCD dimension-6 SMEFT results for Higgs and gauge boson decays in POPxf format

TL;DR

This paper provides NLO QCD and electroweak results for Higgs, Z, and W decays, and Higgsstrahlung processes within the SMEFT framework, formatted for experimental and phenomenological use.

Contribution

It introduces comprehensive NLO SMEFT calculations for various decay channels and production processes, presented in a standardized format for practical application.

Findings

Total Higgs width including all dimension-6 contributions at NLO.

Differential distributions for Higgs decay to leptons and Z at NLO.

Results applicable at multiple collider energies.

Abstract

We present next-to-leading-order (NLO) QCD and electroweak (EW) results using the dimension-6 SMEFT for all 2- and 4- body Higgs decays, for $Z$ and $W$ decays along with the corresponding EW precision observables, and for the Higgstrahlung process $e^+e^-\rightarrow ZH$ at $\sqrt{s}=240$, $365$ and $500$ GeV. The results are presented in the POPxf format for ease of use in experimental and phenomenological studies. Of particular utility is the total Higgs width, including all dimension-6 contributions at NLO. In addition, we present the differential distributions $d\Gamma/dm_{Z*}$ for $H\rightarrow l^+l^- Z^*, Z^*\rightarrow l^+l^-$ at NLO in the SMEFT.