Bottom quark mass and alpha_s from the Upsilon system
High Energy Physics - Phenomenology
2008-11-26 v1
Abstract
The mass of the bottom quark and the strong coupling constant alpha_s are determined from QCD moment sum rules for the Upsilon system. Two analyses are performed using both the pole mass M_b as well as the mass m_b in the scheme. In the pole-mass scheme large perturbative corrections resulting from coulombic contributions have to be resummed. In the scheme this can be avoided by an appropriate choice for the renormalization scale. For the bottom quark mass we obtain M_b = 4.60 +- 0.02 GeV and m_b(m_b) = 4.13 +- 0.06 GeV. Our combined result from both determinations for the strong coupling is alpha_s(M_Z) = 0.119 +- 0.008.
Cite
@article{arxiv.hep-ph/9702276,
title = {Bottom quark mass and alpha_s from the Upsilon system},
author = {Matthias Jamin and Antonio Pich},
journal= {arXiv preprint arXiv:hep-ph/9702276},
year = {2008}
}
Comments
26 pages, LaTeX, 1 postscript figure