Abstract
The values of the cross section for e+e- → hadrons were reported. The measurements were performed for 85 center-of-mass energies between 2 and 5 GeV with the upgraded Beijing Spectrometer (BESII) at the Beijing Electron-Positron collider. The values obtained from BESII had an average uncertainty of about 6.6% which represented a factor of 2 to 3 improvement in precision in the 2 to 5 GeV energy region.
Original language | English |
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Article number | 101802 |
Pages (from-to) | 1018021-1018025 |
Number of pages | 5 |
Journal | Physical Review Letters |
Volume | 88 |
Issue number | 10 |
State | Published - 11 Mar 2002 |