Alpha_s: from DIS to LEP
Abstract
The strong coupling alpha_s is a fundamental parameter of the Standard Model. In comparison to parameters like alpha_em and M_Z it is relatively poorly known. However the precision of alpha_s measurements has improved dramatically in recent years. More than twenty different types of process, from lattice QCD studies to the highest energy colliders, can be used to measure alpha_s accurately. The most precise determinations now quote uncertainties in alpha_s(M_Z) of less than 5%. There is also a remarkable consistency between the various measurements. The present review provides an update on alpha_s measurements from the past year.
Cite
@article{arxiv.hep-ph/9709429,
title = {Alpha_s: from DIS to LEP},
author = {W. J. Stirling},
journal= {arXiv preprint arXiv:hep-ph/9709429},
year = {2007}
}
Comments
12 pages LaTeX and 4 encapsulated postscript figures, using epsfig and (modified) l-school macros. Based on a talk presented at the conference on New Non-Perturbative Methods and Quantisation on the Light Cone, Les Houches, March 1997