New R values in 2-5 GeV from the BESII at BEPC

Details New R values in 2-5 GeV from the BESII at BEPC New R values in 2-5 GeV from the BESII at BEPC

2000-12-16

arxiv.org/abs/hep-ex/0012038v1

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 1 figure, talk given at ICHEP2000

Scientific paper

We report preliminary $R$ values for all 85 energy points scanned in the energy region of 2-5 GeV with the upgraded Beijing Spectrometer (BESII) at the Beijing Electron Positron Collider (BEPC). The typical uncertainty on the R values we measured is about 7%. The new R values have a significant impact on the predicted mass of the Higgs coming from the global fit to the electroweak data, and will also contribute to the interpretation of the E821 g-2 experiment.

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