Number of J/ψ events at BESIII

作者：Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Balossino, I.; Ban, Y.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bloms, J.; Bortone, A.; Boyko, I.; Briere, R. A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Cetin, S. A.; Chang, J. F.; Chang, W. L.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, M. L.; Chen, S. J.; Chen, X. R.; Chen, Y. B.

来源：Chinese Physics C, 2022, 46(7): 074001.

DOI：10.1088/1674-1137/ac5c2e

• number of J/psi events
• BESIII detector
• inclusive J/psi decays

Using inclusive decays of J/psi, a precise determination of the number of J/psi events collected with the BESIII detector was performed. For the two data sets taken in 2009 and 2012, the numbers of J/psi events were recalculated (224.0 +/- 1.3) x 10(6) (1088.5 +/- 4.4) x 10(6), respectively; these numbers are in good agreement with the previous measurements. For the J/psi sample taken in 2017-2019, the number of events was determined to be (8774 .0 +/- 39 .4) x 10(6). The total number of J/psi events collected with the BESIII detector was determined to be (10087 +/- 44) x 10(6), where the uncertainty is dominated by systematic effects, and the statistical uncertainty is negligible.