TTP07-09 Precise Charm and Bottom quark masses

New data for the total cross section σ(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 \overline{MS} charm and bottom quark masses. The final result for the \overline{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.