Review of alpha_s determinations
High Energy Physics - Phenomenology
2013-03-12 v1 High Energy Physics - Experiment
High Energy Physics - Lattice
Abstract
The present knowledge on the strong coupling is briefly summarized. The most precise determinations of alpha_s, at different energies, are reviewed and compared at the Z mass scale, using the predicted QCD running. The impressive agreement achieved between experimental measurements and theoretical predictions constitutes a beautiful and very significant test of Asymptotic Freedom, establishing QCD as the fundamental theory of the strong interaction. The world average value of the strong coupling is found to be alpha_s(M_Z^2)= 0.1186 \pm 0.0007.
Keywords
Cite
@article{arxiv.1303.2262,
title = {Review of alpha_s determinations},
author = {Antonio Pich},
journal= {arXiv preprint arXiv:1303.2262},
year = {2013}
}
Comments
Invited talk at the Xth Conference on Quark Confinement and the Hadron Spectrum (Munich, 8-12 October 2012). 15 pages, 4 figures