Determination of $M_b$ and $α_s$ from the Upsilon System

Details Determination of $M_b$ and $α_s$ from the Upsilon System Determination of $M_b$ and $α_s$ from the Upsilon System

1997-09-29

arxiv.org/abs/hep-ph/9709495v1

Nucl.Phys.Proc.Suppl. 64 (1998) 371-375

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 Postscript figure Invited talk at the High Energy Conference on Quantum Chromodynamics (QCD'97), Montpellier, July

Scientific paper

10.1016/S0920-5632(97)01091-8

The mass of the bottom quark (both the pole mass $M_b$ and the $\MSb$ mass $m_b$) and the strong coupling constant $\alpha_s$ have been determined from QCD moment sum rules for the $\Upsilon$ 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 $\alpha_s(M_Z)=0.119 \pm 0.008$.

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