Publication Date:
2016-06-15
Description:
From 2011 to 2014, the BESIII experiment collected about 5 fb −1 data at center-of-mass energies around 4 GeV for the studies of the charmonium-like and higher excited charmonium states. By analyzing the di-muon process e + e − → γ ISR/FSR μ + μ − , the center-of-mass energies of the data samples are measured with a precision of 0.8 MeV. The center-of-mass energy is found to be stable for most of the time during data taking.
Print ISSN:
1674-1137
Topics:
Physics
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