Jul 6 – 13, 2022
Bologna, Italy
Europe/Rome timezone

R value measurements at BESIII

Jul 8, 2022, 9:00 AM
Room 1 (Europa Auditorium)

Room 1 (Europa Auditorium)

Parallel Talk Strong interactions and Hadron Physics Strong interactions and Hadron Physics


Weiping Wang (USTC)


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

In-person participation No

Primary author

Presentation materials