ar X iv : h ep - p h / 99 03 52 1 v 1 2 9 M ar 1 99 9 Measurement of R Between 2 - 5 GeV Derrick Kong
نویسنده
چکیده
We have obtained measurements of the total cross section for e + e − annihilation into hadronic final states for 6 energy points (2.6, 3.2, 2.4, 3.55, 4.6, and 5.0 GeV) with the upgraded Beijing Spectrometer (BESII). We report preliminary values from this data and outline future plans for a finer scan in the 2-5 GeV energy range.
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