Precise Charm and Bottom quark masses

Abstract

New data for the total cross section sigma(e^+e^- --> hadrons) in the charm and bottom threshold region are combined with an improved theoretical analysis, which includes recent four-loop calculations, to determine the short distance \bar{MS} charm and bottom quark masses. The final result for the \bar{MS}-masses, m_c(3 GeV)=0.986(13) GeV and m_b(10 GeV)=3.609(25) GeV is consistent with but significantly more precise than a similar previous study.

Figures (2)

• Figure 1: $R(s)$ in the charm threshold region.
• Figure 2: Comparison of recent determinations of $m_b(m_b)$