Speaker
Description
The inclusive measurement of R, which is the ratio of the leading-order cross sections between inclusive hadronic events and a pair of muon leptons, is of great importance in the precision test of the Standard Model. For example, the determination of QED running coupling constant at the Z pole, the evaluation of the muon anomaly, and search and study of exotic hadron states. We will introduce the inclusive R measurement at BESIII, including the published results and ongoing efforts based on the energy-scan method. In addition, we will present a novel approach for R measurement that combines the advantages of the initial-state radiation technique with the inclusive method. This approach enables an inclusive determination of R over the energy range from 0.3 to 2.0 GeV, which is of significant interest to the community.
| Are you an early career researcher? | No |
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