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Measurements of the center-of-mass energies at BESIII via the di-muon process |
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| Authors: | M Ablikim M N Achasov X C Ai O Albayrak M Albrecht D J Ambrose |
| Affiliation: | 1. Institute of High Energy Physics, Beijing 100049, China2. G. I. Budker Institute of Nuclear Physics SB RAS(BINP), Novosibirsk 630090, Russia3. Also at the Novosibirsk State University, Novosibirsk, 630090, Russia4. Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA5. Bochum Ruhr-University, D-44780 Bochum, Germany6. University of Rochester, Rochester, New York 14627, USA |
| Abstract: | 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 the time during data taking. |
| Keywords: | center-of-mass energy di-muon process charmoniumlike states |
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