arXiv:hep-ph/9910345·v1·High Energy Physics — Phenomenology
Quark mass effects to \sigma(e^+e^- -> hadrons) at O(\alpha_s^3)
K.G. Chetyrkin🇩🇪 · R. Harlander🇩🇪 · J.H. Kuehn🇩🇪
Abstract
The calculation of the quartic mass terms at order \alpha_s^3 to the hadronic R ratio is described. It is based on the operator product expansion for the quark current correlator, combined with an application of the renormalization group equation.
Comments: Latex, 3+2 pages, 10 ps-files included. Talk presented by R.H. at the International Europhysics Conference on High Energy Physics (EPS-HEP99), Tampere, Finland, July 15-21, 1999. The paper, with figures, is also available via anonymous ftp at ftp://ttpux2.physik.uni-karlsruhe.de/ttp99/ttp99-42/ or via www at http://www-ttp.physik.uni-karlsruhe.de/Preprints/