Higgs boson decay into heavy quarks and heavy leptons: higher order corrections

TL;DR

This paper reviews theoretical predictions for the Higgs boson decay widths into bottom quarks and tau leptons, emphasizing higher order QCD and QED corrections up to alpha_s^4, and discusses associated uncertainties.

Contribution

It provides an updated analysis of higher order perturbative corrections to Higgs decay widths into heavy fermions within the Standard Model.

Findings

Higher order QCD corrections significantly affect decay width predictions.

QED corrections also contribute notably to decay width calculations.

Uncertainties in decay width estimates are thoroughly discussed.

Abstract

Theoretical predictions for the decay width of Standard Model Higgs boson into bottom quarks and tau-leptons, in the case when M_H< 2M_W, are briefly reviewed. The effects of higher order perturbative QCD (up to alpha_s^4-level) and QED corrections are considered. The uncertainties of the decay width of Higgs boson into bb and tau+tau- are discussed.