Higgs pseudo observables and radiative corrections

We show how leading radiative corrections can be implemented in the general description of $$h\rightarrow 4\ell $$h→4ℓ decays by means of pseudo observables (PO). With the inclusion of such corrections, the PO description of $$h\rightarrow 4\ell $$h→4ℓ decays can be matched to next-to-leading-order electroweak calculations both within and beyond the Standard Model (SM). In particular, we demonstrate that with the inclusion of such corrections the complete next-to-leading-order SM prediction for the $$h\rightarrow 2e2\mu $$h→2e2μ dilepton mass spectrum is recovered within $$1\,\%$$1% accuracy. The impact of radiative corrections for non-standard PO is also briefly discussed.