Wilson coefficients for Higgs boson production and decoupling relations to $\mathcal{O}\left({\alpha }_s^4\right)$

Abstract

An important ingredient for the calculation of Higgs boson properties in the infinite top quark mass limit is the knowledge of the effective coupling between the Higgs bosons and gluons, i.e. the Wilson coefficients $C_H$ and $C_{HH}$ for one and two Higgs bosons, respectively. In this work we calculate for the first time $C_{HH}$ to four loops in a direct, diagrammatic way, discussing in detail all issues arising due to the renormalization of operator products. Furthermore, we also calculate the Wilson coefficient $C_H$ for the coupling of a single Higgs boson to gluons as well as all four loop decoupling relations in QCD with general SU$(N_c)$ colour factors. The latter are related to $C_H$ and $C_{HH}$ via low-energy theorems.

arXiv comment23 pages

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