Determination of alpha_s from the QCD static energy: an update
High Energy Physics - Phenomenology
2020-06-05 v3 High Energy Physics - Experiment
High Energy Physics - Lattice
Abstract
We present an update of our determination of the strong coupling alpha_s from the quantum chromodynamics static energy. This updated analysis includes new lattice data, at smaller lattice spacings and reaching shorter distances, the use of better suited perturbative expressions to compare with data in a wider distance range, and a comprehensive and detailed estimate of the error sources that contribute to the uncertainty of the final result. Our updated value for alpha_s at the Z-mass scale, M_Z, is alpha_s(M_Z)=0.1166^{+0.0012}_{-0.0008}, which supersedes our previous result.
Keywords
Cite
@article{arxiv.1407.8437,
title = {Determination of alpha_s from the QCD static energy: an update},
author = {Alexei Bazavov and Nora Brambilla and Xavier Garcia i Tormo and Peter Petreczky and Joan Soto and Antonio Vairo},
journal= {arXiv preprint arXiv:1407.8437},
year = {2020}
}
Comments
20 pages, 23 figures. v2: Minor changes. Journal version. v3: Misprint corrected in Eq.(11), results unchanged