Measurement of the Total Cross Section for Hadronic Production bye+eAnnihilation at Energies between 2.6–5 GeV

Abstract
Using the upgraded Beijing Spectrometer, we have measured the total cross section for e+e annihilation into hadronic final states at center-of-mass energies of 2.6, 3.2, 3.4, 3.55, 4.6, and 5.0 GeV. Values of R, σ(e+ehadrons)/σ(e+eμ+μ), are determined.
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