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  • Study of e+e−→ γϕJ/ψ from s = 4.600 to 4.951 GeV
    Bakina, O.; Balossino, I.; Che, G. R.; Dedovich, D.; Destefanis, M.; Duan, Z. H.; Fang, J.; Felici, G.; Fischer, K; Fu, C. D.; Gao, H.; Gao, Y. N.; Garzia, I.; Greco, M.; Gu, M. H.; Guskov, A.; Harris, F. A.; Hou, Y. R.; Hu, J. F.; Hu, T.; Hu, Y.; Huang, G. S.; Hüsken, N; Jeong, J. H.; Jiang, Y.; Kang, X. L.; Kappert, R.; Kavatsyuk, M.; Lavania, A.; Li, C. H.; Li, L. J; Li, Lei; Li, X. H.; Li, Xiaoyu; Li, Y. G.; Li, Z. Y.; Libby, J.; Lin, T.; Liu, B. J.; Liu, C. X.; Liu, F. H.; Liu, Feng; Liu, H.; Liu, Huanhuan; Liu, K.; Liu, T.; Liu, Y. B.; Ma, F. C.; Ma, Y.; Maggiora, M.; Mao, Y. J.; Marcello, S.; Mezzadri, G.; Ning, Z.; Prasad, V.; Qi, F. Z.; Qin, X. P.; Qin, Z. H.; Rivetti, A.; Rolo, M.; Rong, G.; Rosner, Ch; Ruan, S. N.; Schoenning, K.; Shan, W.; Shan, X. Y.; Song, J. J.; Stieler, F.; Sun, Y. J.; Uman, I.; Wang, D. Y.; Wang, T. J.; Wang, W. P.; Wang, Yaqian; Wang, Ziyi; Wu, J. F.; Xie, C.; Xu, C. F.; Xu, C. J.; Xu, Z. P.; Yan, L.; Yan, W. B.; Yang, H. X.; Ye, M. H.; Yu, B. X.; Zeng, F. R.; Zhang, H. H.; Zhang, J. X.; Zhang, J. Y.; Zhang, Jianyu; Zhang, Y.; Zhang, Y. H.; Zhang, Z. H.; Zhang, Z. Y.; Zhang, Z. Y.; Zhao, M. G.; Zhao, Y. X.; Zhao, Z. G.; Zhu, K.; Zhu, L. X.

    The journal of high energy physics, 01/2023, Letnik: 2023, Številka: 1
    Journal Article

    A bstract Using data samples with an integrated luminosity of 6 . 4 fb − 1 collected by the BESIII detector operating at the BEPCII storage ring, the process of e + e − → γϕJ/ψ is studied. The processes of e + e − → ϕχ c 1 , c 2 , χ c 1 , c 2 → γJ/ψ are observed with a significance of more than 10 σ . The s -dependent cross section of e + e − → ϕχ c 1 , c 2 is measured between 4.600 and 4.951 GeV, and evidence of a resonance structure is found for the first time in the ϕχ c 2 process. We also search for the processes of e + e − → γX (4140), γX (4274) and γX (4500) via the γϕJ/ψ final state, but no obvious structures are found. The upper limits on the production cross section times the branching fraction for these processes at the 90% confidence level are reported.

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