Theoretical uncertainties for measurements of alpha_s from electroweak observables
High Energy Physics - Phenomenology
2009-11-11 v4
Abstract
One of the most precise measurements of the strong coupling constant alpha_s(MZ) is obtained in the context of global analyses of precision electroweak data. This article reviews the sensitivity of different electroweak observables to alpha_s and describes the perturbative uncertainties related to missing higher orders. The complete renormalisation scale dependence for the relevant observables is calculated at next-to-next-to-leading order and a new method is presented to determine the corresponding perturbative uncertainty for measurements of alpha_s based on these observables.
Keywords
Cite
@article{arxiv.hep-ph/0501245,
title = {Theoretical uncertainties for measurements of alpha_s from electroweak observables},
author = {H. Stenzel},
journal= {arXiv preprint arXiv:hep-ph/0501245},
year = {2009}
}
Comments
v4: Revised version with new tables and figures