Charm and bottom quark masses: An update

Using new four-loop results for the heavy quark vacuum polarization and new data for bottom quark production in electron-positron annihilation, an update on the determination of charm- and bottom-quark masses through sum rules has been performed. The previous result for the charm-quark mass, m_c(3GeV)=0.986(13)GeV, based on the lowest moment, is supported by the new results from higher moments which lead to consistent values with comparable errors. The new value for the bottom quark, m_b(10GeV)=3.610(16)GeV, corresponding to m_b(m_b)=4.163(16)GeV, makes use of both the new data and the new perturbative results and is consistent with the earlier determination.