【摘 要】
：
During the 2016-17 and 2018-19 running periods,the BESⅢ experiment collected 7.5 fb-1 of e+e-col-lision data at center-of-mass energies ranging from 4.13 to 4.44 GeV.These data samples are primarily used for the study of excited charmonium and charmoniuml
【机 构】
：
Institute of High Energy Physics,Beijing 100049,China;G.I.Budker Institute of Nuclear Physics SB RAS
论文部分内容阅读
During the 2016-17 and 2018-19 running periods,the BESⅢ experiment collected 7.5 fb-1 of e+e-col-lision data at center-of-mass energies ranging from 4.13 to 4.44 GeV.These data samples are primarily used for the study of excited charmonium and charmoniumlike states.By analyzing the di-muon process e+e-→(γISR/FSR)μ+μ-,we measure the center-of-mass energies of the data samples with a precision of 0.6 MeV.Through a run-by-run study,we find that the center-of-mass energies were stable throughout most of the data-collection period.
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