# Completing the hadronic Higgs boson decay at order $\alpha_s^4$

## TL;DR

This paper calculates four-loop quantum corrections to the Higgs boson's decay into hadrons, completing the theoretical predictions at order lpha_s^4 and improving precision in Standard Model calculations.

## Contribution

It provides the first complete calculation of lpha_s^4 corrections to the hadronic decay of the Higgs boson, including effects mediated by the top quark.

## Key findings

- Numerical corrections are comparable to previous massless results.
- Results complete the lpha_s^4 order for Higgs decay calculations.
- Enhances precision of theoretical predictions for Higgs decay rates.

## Abstract

We compute four-loop corrections to the hadronic decay of the Standard Model Higgs boson which are induced by effective couplings to bottom quarks and gluons, mediated by the top quark. Our numerical results are comparable in size to the purely massless contributions which have been known for a few years. The results presented in this paper complete the order $\alpha_s^4$ corrections to the hadronic Higgs boson decay.