New method for renormalon subtraction using Fourier transform

To improve accuracy in calculating QCD effects, we propose a method for renormalon subtraction in the context of the operator-product expansion. The method enables subtracting renormalons of various powers in Lambda(QCD) efficiently and simultaneously from single-scale observables. We apply it to different observables and examine consistency with theoretical expectations. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

A method for renormalon subtraction in the context of the operator-product expansion is proposed to improve accuracy in calculating QCD effects, which efficiently subtracts renormalons of various powers in Lambda(QCD) from single-scale observables. It is applied to different observables to examine consistency with theoretical expectations.