The strong coupling from tau decays without prejudice
High Energy Physics - Phenomenology
2012-12-27 v2 High Energy Physics - Experiment
High Energy Physics - Lattice
Abstract
We review our recent determination of the strong coupling \alpha_s from the OPAL data for non-strange hadronic tau decays. We find that \alpha_s(m^2_\tau) =0.325+-0.018 using fixed-order perturbation theory, and \alpha_s(m^2_\tau)=0.347+-0.025 using contour-improved perturbation theory. At present, these values supersede any earlier determinations of the strong coupling from hadronic tau decays, including those from ALEPH data.
Keywords
Cite
@article{arxiv.1212.0091,
title = {The strong coupling from tau decays without prejudice},
author = {Diogo Boito and Maarten Golterman and Matthias Jamin and Andisheh Mahdavi and Kim Maltman and James Osborne and Santiago Peris},
journal= {arXiv preprint arXiv:1212.0091},
year = {2012}
}
Comments
4 pages, contribution to TAU2012; the style file available on arXiv did not process our paper correctly