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  • Cross section measurement of \(e^+e^- \rightarrow \eta'J/\psi\) from \(\sqrt{s} = 4.178\) to \(4.600\) GeV
    Berger, N; Bertani, M; Bettoni, D; Bloms, J; Cetin, S A; Chang, J F; Chang, W L; Chen, G; Denig, A; De Mori, F; Dong, M Y; Farinelli, R; Y Fu; Gao, Q; Gao, X L; Goetzen, K; Gong, L; Gradl, W; Gu, M H; Guo, A Q; Guskov, A; He, K L; Huang, X Z; Ji, Q P; Ji, X L; Jiang, H L; Jiang, X S; Johansson, T; Kappert, R; Ke, B C; Kiuchi, R; Kupsc, A; Kurth, M; Li, D M; F Li; Li, J C; Li, X L; Liang, Y T; Liao, G R; Lin, C X; Liu, D Y; Liu, H B; Liu, Huanhuan; Liu, Huihui; Liu, L Y; Liu, Y B; Lou, X C; Y Lu; Luo, P W; Luo, T; Luo, X L; Ma, M M; Ma, Q M; Ma, Y M; Malik, Q A; Meng, Z X; Messchendorp, J G; Min, T J; Niu, S L; Pan, Y; Pelizaeus, M; Peng, H P; Ping, R G; Qiao, C F; Savrié, M; Shan, X Y; Shen, C P; Shi, X; Shi, X D; Song, J J; Sowa, C; Sun, S S; Wang, X L; Wang, Z G; Wen, H W; Wolke, M; Wu, L H; Yan, W C; Yang, Y H; Yang, Y X; Yin, J H; You, Z Y; Yu, B X; Yuan, Y; Zhang, J W; Zhang, T J; Zhang, Y; Zhao, J; Zhao, Ling; Zhao, M G; Zhao, S J; Zheng, Y H; Zhou, L P; Zhou, X; Zhou, Xu; Zhu, A N; Zhu, K; Zhu, K J; Zhu, Y S; Zou, B S

    arXiv.org, 01/2020
    Paper

    The cross section of the process \(e^+e^- \rightarrow \eta'J/\psi\) is measured at center-of-mass energies from \(\sqrt{s} =\) 4.178 to 4.600 GeV using data samples corresponding to a total integrated luminosity of 11 fb\(^{-1}\) collected with the BESIII detector operating at the BEPCII storage ring. The dependence of the cross section on \(\sqrt{s}\) shows an enhancement around \(4.2\) GeV. While the shape of the cross section cannot be fully explained with a single \(\psi(4160)\) or \(\psi(4260)\) state, a coherent sum of the two states does provide a reasonable description of the data.

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