New R Values in 2-5 Gev from the Beijing Spectrometer

Details New R Values in 2-5 Gev from the Beijing Spectrometer New R Values in 2-5 Gev from the Beijing Spectrometer

2001-05-24

arxiv.org/abs/hep-ex/0105074v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 1 figure, 1 table, talk given at XXXVIth Rencontres de Moriond, Electroweak Interactions and Unified Theories, Les Ar

Scientific paper

The values of $R = \sigma(e^+e^-\to {hadrons})/\sigma(e^+e^-\to\mu^+\mu^-)$
for 85 center-of-mass energies between 2 and 5 GeV were measured with the
upgraded Beijing Spectrometer at the Beijing Electron-Positron Collider, with
an average uncertainty of $\sim7%$.

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