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  • Measurement of the integrated luminosity and the center-of-mass energy of the data taken by BESIII at $\sqrt{s} = 2.125$ GeV
    Ablikim, M; Achasov, M. N; Albrecht, M; Amoroso, A; An, F. F; An, Q; Boger, E; Calcaterra, A; Chen, H. S; Chen, M. L; Chen, S. J; Chen, Y. B; Cibinetto, G; Dai, J. P; Deng, Z. Y; Denysenko, I; Du, S. X; Duan, P. F; Fang, J; Fang, X; Fang, Y; Farinelli, R; Fedorov, O; Fu, C. D; Gao, Z; Greco, M; Gu, M. H; Gu, Y. T; Guo, Y. P; Hafner, A; Harris, F. A; He, K. L; Heinsius, F. H; Hou, Z. L; Hu, H. M; Hu, T; Ji, Q. P; Ke, B. C; Kloss, B; Kupsc, A; Lange, J. S; Larin, P; Leithoff, H; Li, H. B; Li, Q. Y; Li, W. D; Liang, Y. F; Liang, Y. T; Liao, G. R; Liu, F. H; Liu, H. M; Liu, J. P; Liu, J. Y; Liu, K; Liu, Y. Y; Liu, Zhiqing; Loehner, H; Lu, Y; Luo, C. L; Ma, M. M; Ma, T; Maggiora, M; Mao, Z. P; Marcello, S; Min, T. J; Mo, X. H; Nefedov, Y; Nerling, F; Ouyang, Q; Patteri, P; Pelizaeus, M; Pettersson, J; Ping, J. L; Qiao, C. F; Qin, Z. H; Ripka, M; Rong, G; Rosner, Ch; Sarantsev, A; Schoenning, K; Shan, W; Shao, M; Shen, C. P; Shen, X. Y; Sheng, H. Y; Shi, M; Sosio, S; Spataro, S; Sun, J. F; Sun, Y. J; Sun, Y. Z; Sun, Z. J; Tang, X; Thorndike, E. H; Wang, B; Wang, B. L; Wang, M; Wang, P; Wang, W. P; Wang, Y. F

    05/2017
    Journal Article

    To study the nature of the state $Y(2175)$, a dedicated data set of $e^+e^-$ collision data was collected at the center-of-mass energy of 2.125 GeV with the BESIII detector at the BEPCII collider. By analyzing large-angle Bhabha scattering events, the integrated luminosity of this data set is determined to be $108.49\pm0.02\pm0.85$ pb$^{-1}$, where the first uncertainty is statistical and the second one is systematic. In addition, the center-of-mass energy of the data set is determined with radiative dimuon events to be $2126.55\pm0.03\pm0.85$ MeV, where the first uncertainty is statistical and the second one is systematic.

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