During the 2016-17 and 2018-19 running periods, the BESIII experiment collected 7.5 fb(-1) of e(+)e(-) collision 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(-) -> (gamma ISR/FSR)mu(+)mu(-), 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.
Measurements of the center-of-mass energies of e+e- collisions at BESIII
Amoroso, A;Bianchi, F;Bortone, A;Destefanis, M;De Mori, F;Fava, L;Greco, M;Hu, JF;Lavezzi, L;Maggiora, M;Marcello, S;Rivetti, A;Sosio, S;Spataro, S;Yan, L;
2021-01-01
Abstract
During the 2016-17 and 2018-19 running periods, the BESIII experiment collected 7.5 fb(-1) of e(+)e(-) collision 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(-) -> (gamma ISR/FSR)mu(+)mu(-), 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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