Determination of $M_b$ and $α_s$ from the Upsilon System
arXiv:hep-ph/9709495 · doi:10.1016/S0920-5632(97)01091-8
Abstract
The mass of the bottom quark (both the pole mass $M_b$ and the $\MSb$ mass $m_b$) and the strong coupling constant $α_s$ have been determined from QCD moment sum rules for the $Υ$ system. In the pole-mass scheme large perturbative corrections resulting from coulombic contributions have been resummed. The results of this analysis are: $M_b=4.60 \pm 0.02 \gev$, $m_b(m_b)=4.13 \pm 0.06 \gev$ and $α_s(M_Z)=0.119 \pm 0.008$.
5 pages, 1 Postscript figure Invited talk at the High Energy Conference on Quantum Chromodynamics (QCD'97), Montpellier, July 1997