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

2026/05/18 by Luigi Bellafronte, Sally Dawson, Clara Del Pio +2
#hep-ph

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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^-→ ZH at √(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 dΓ/dm_Z* for H→ l⁺l^- Z^*, Z^*→ l⁺l^- at NLO in the SMEFT.

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