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R value measurements at BESIII

Aug 11, 2022, 11:30 AM
Oral report 强子物理与味物理 Parallel Session VIII (2):Hadron and Flavor Physics


Dr Weiping Wang (University of Science and Technology of China)


At BESIII, the R value is measured with a total of 14 data points with the corresponding c.m. energy going from 2.2324 to 3.6710 GeV. The statistical uncertainty of the measured R is less than 0.6%. Two different simulation models, the LUARLW and a new Hybrid generated, are used and give consistent detection efficiencies and initial-state-radiation corrections. An accuracy of better than 2.6% below 3.1 GeV and 3.0% above is achieved in the R values.

Primary author

Dr Weiping Wang (University of Science and Technology of China)

Presentation materials