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+====== TTP02-27 Determination of $\alpha_s$ and the charm and bottom quark masses from recent measurements of $R(s)$ ======
+<hidden TTP02-27  Determination of $\alpha_s$ and the charm and bottom quark masses from recent measurements of $R(s)$ > Recent experimental data for the total cross
+ section $\sigma(e^+e^-\to\mbox{hadrons})$ are compared
+ with the up-to-date
+ theoretical prediction of perturbative QCD for those energies where
+ perturbation theory is reliable. This allows for a
+ determination of the strong coupling
+ $\alpha_s^{(4)}(5~\mbox{GeV})=0.235\pm0.047$.
+ The precise data from the charm threshold region,
+ when combined with the recent evaluation of moments with three loop
+ accuracy, lead to a direct determination of the short distance
+ $\overline{\rm MS}$ charm quark mass $m_c(m_c)=1.304(27)$.
+ Applying the
+ same approach to the bottom quark we obtain $m_b(m_b)=4.191(51)$~GeV.
+ </hidden>
+|**J.H. K\"uhn and M. Steinhauser**  |
+|**  Proceedings of ICHEP 2002, Elsevier Science B.V., Bentvelsen et al. Eds.    539-541 2002  **  |
+| {{preprints:2002:ttp02-27.pdf|PDF}} {{preprints:2002:ttp02-27.ps|PostScript}}   |
+| |