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# Measurement of the center-of-mass energies at BESIII via the di-muon process

Submit Time: 2016-09-12
Author:
Institute: 1.BESIII Collaboration;

## Abstracts

 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?→γISR/FSRμ+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 time during the data taking.
Recommended references： Ablikim, M. and others.(2016).Measurement of the center-of-mass energies at BESIII via the di-muon process.[ChinaXiv:201609.00784] (Click&Copy)
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