Electroweak corrections in the Two-Higgs-Doublet Model and a Singlet Extension of the Standard Model

TL;DR

This paper calculates electroweak corrections to Higgs boson decays into four fermions within extended Standard Model frameworks, improving precision and understanding of these processes.

Contribution

It provides the first next-to-leading-order electroweak correction calculations for Higgs decays in these models, implemented in the PROPHECY4F tool.

Findings

Corrections reduce renormalization scale dependence.

Different schemes yield consistent decay width predictions.

Enhanced precision in Higgs decay modeling.

Abstract

We present the next-to-leading-order calculation of the partial decay widths of light CP-even Higgs bosons decaying into four fermions in the Two-Higgs-Doublet Model and a Singlet Extension of the Standard Model. Different renormalization schemes are applied in the calculation, which is implemented into the analysis tool PROPHECY4F. Some sample results on the Higgs->4fermions decay widths illustrate how the corrections reduce the dependence on the renormalization scale and the choice of the scheme.