Bottom quark mass and αs from the ϒ system

1997/02/06 by Matthias Jamin, Antonio Pich · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1016/s0550-3213(97)00558-0

published as Nucl.Phys.B507:334-352,1997 · 26 pages, LaTeX, 1 postscript figure

arxiv created 1997/02/06 · openalex publication_date 1997/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

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 \MSb scheme. In the pole-mass scheme large perturbative corrections resulting from coulombic contributions have to be resummed. In the \MSb 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.

Citations

• Status of the Strong Coupling Constant
• Review of particle properties

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