Higgs Decay To \bar{b}b: Different Approaches To Resummation Of QCD Effects

TL;DR

This paper compares different QCD resummation approaches for Higgs decay to bottom quarks, highlighting the importance of including higher-order terms to reduce discrepancies between parameterisations.

Contribution

It presents a detailed comparison of perturbation parameterisations using MS and pole mass schemes, emphasizing the significance of _s^3 terms.

Findings

Including _s^3 terms reduces deviations between methods.

The pole mass scheme with higher-order corrections aligns better with the MS scheme.

Resummation approach impacts the precision of Higgs decay width calculations.

Abstract

The comparison between parameterisations of the perturbation results for the decay width of the Standard Model Higgs boson to \bar{b}b-quarks pairs, based on application of \bar{MS}-scheme running quark mass and pole b-quark mass, are presented. In the case of the latter parameterisation taking into account of order O(\alpha_s^3) term is rather important. It is minimising deviations of the results obtained at the O(\alpha_s^2) level from the results, which follow from the running quark mass approach