Speaker
Christoph Redmer
(Universität Mainz)
Description
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.
| Preferred track | Hadron Structure |
|---|---|
| Subfield | HEP experiment |
| Attending in-person? | Yes |
| On behalf of collaboration? | BESIII |
