Two-loop leading-colour QCD helicity amplitudes for Higgs boson production in association with a bottom-quark pair at the LHC

TL;DR

This paper presents the calculation of two-loop QCD helicity amplitudes for Higgs production with bottom quarks at the LHC, providing analytic expressions suitable for precise theoretical predictions.

Contribution

It introduces the first analytic expressions for two-loop helicity amplitudes in this process using leading colour approximation and finite field evaluations.

Findings

Analytic formulas for two-loop amplitudes derived

Results applicable across full phase space

Enhances precision of Higgs production predictions

Abstract

We compute the two-loop QCD helicity amplitudes for the production of a Higgs boson in association with a bottom-quark pair at a hadron collider. We take the approximations of leading colour and work in the five flavour scheme, where the bottom quarks are massless while the Yukawa coupling is non-zero. We extract analytic expressions from multiple numerical evaluations over finite fields and present the results in terms of an independent set of special functions that can be reliably evaluated over the full phase space.