Final R-value results from 2-5 GeV from BES and QCD test with R scan data

Details Final R-value results from 2-5 GeV from BES and QCD test with R scan data Final R-value results from 2-5 GeV from BES and QCD test with R scan data

2002-10-17

arxiv.org/abs/hep-ex/0210042v1

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 5 figures, Talk given at ICHEP2002

Scientific paper

10.1016/S0920-5632(03)90514-7

Final results of the measurement of $R = \sigma(e^+e^- \to hadrons) /\sigma(e^+e^- \to \mu^+\mu^-)$ in the energy region from 2 to 5 GeV with the upgraded Beijing Spectrometer (BESII) at the Beijing Electron Positron Collider (BEPC) are presented. Preliminary results of the inclusive momentum spectra and second binomial moment measured with the $R$ scan data at 2.2, 2.6, 3.0, 3.2, 4.6 and 4.8 GeV are reported.

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