The fully differential decay rate of a Higgs boson to bottom-quarks at NNLO in QCD

TL;DR

This paper presents the first fully differential NNLO QCD calculation of the Higgs boson decay to bottom quarks, improving precision for collider experiments.

Contribution

It introduces a novel non-linear mapping method for handling singularities in radiative processes, applied here for the first time.

Findings

First NNLO differential decay rate calculation for Higgs to bottom quarks

Implementation of a new non-linear mapping technique for singularity treatment

Enhanced theoretical precision for Higgs decay measurements

Abstract

The decay of a light Higgs boson to bottom quarks is dominant and can be exploited for the discovery of the Higgs particle and the measurement of its properties at the LHC and future collider experiments. We perform a first computation of the fully differential decay at next-next-to-leading order in perturbative QCD. We employ a novel method of non-linear mappings for the treatment of singularities in the radiative processes which contribute to the decay width. This constitutes the first physical application of the method.