R-values from low energy e(+)e(-) annihilation

@article{Zhao2000RvaluesFL,
  title={R-values from low energy e(+)e(-) annihilation},
  author={Z. G. Zhao},
  journal={International Journal of Modern Physics A},
  year={2000},
  volume={15},
  pages={368-385}
}
  • Z. Zhao
  • Published 8 February 2000
  • Physics
  • International Journal of Modern Physics A
The QED running coupling constant α(s) and the anomalous magnetic moment of muon aμ are two fundamental quantities for the precision test of the Standard Model (SM). The current uncertainties on α(s) and aμ are dominated by the contribution from the R-values measured about 20 years ago with an averaged uncertainty of 15% in the energy region below 5 GeV. This review article summarizes the recent measurements of R-values in low energy e+e- annihilation. The new experiments aimed at reducing the… 
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