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  • Observation of Structures in the Processes e^{+}e^{-}→ωχ_{c1} and ωχ_{c2}
    Bertani, M; Chen, H S; Coen, S C; Dai, J P; Denysenko, I; De Mori, F; Ding, Y; Dong, L Y; Fu, Y W; Gong, W X; Guo, R P; Han, W Y; Hou, G Y; Huang, L Q; Huang, Y P; Jackson, J; Ji, X L; Jiang, S S; Jiang, T J; Jiao, J B; Johansson, T; K, X; Lane, J J; Lenz, T; Li, C; Li, C H; Li, H; Li, H N; Li, J W; Li, Ke; Li, L J; Li, Lei; Li, W D; Li, X H; Li, Y G; Li, Z J; Liang, C; Liang, Y F; Libby, J; Lin, T; Liu, F H; Liu, K Y; Liu, S B; Liu, W K; Ma, H; Ma, M M; Ma, Q M; Ma, R Q; Ma, X Y; Mangoni, A; Meng, Z X; Messchendorp, J G; Min, T J; Mo, X H; Nerling, F; Pei, Y P; Qi, H R; Qin, X P; Schoenning, K; Scodeggio, M; Shi, Q Q; Song, W M; Sun, H K; Sun, S S; Sun, Y Z; Tat, M; Wang, S J; Wang, X J; Wang, Y Q; Wang, Yaqian; Wang, Ziyi; Wei, D; Wolke, M; Wu, C; Xian, X M; Xiao, D; Xie, X H; Xie, Z P; Yang, Y X; Yang, Z W; Yao, Z P; Yu, J S; Yue, C X; Zeng, F R; Zeng, Y J; Zhai, X Y; Zhang, B X; Zhang, H Y; Zhang, J; Zhang, L M; Zhang, Q Y; Zhang, X Y; Zhang, Yan; Zhao, Y B; Zheng, Y H; Zhou, H; Zhou, X Y; Zhu, J; Zhu, K; Zhu, S H

    Physical review letters, 2024-Apr-19, 20240419, Letnik: 132, Številka: 16
    Journal Article

    We present measurements of the Born cross sections for the processes e^{+}e^{-}→ωχ_{c1} and ωχ_{c2} at center-of-mass energies sqrts from 4.308 to 4.951 GeV. The measurements are performed with data samples corresponding to an integrated luminosity of 11.0  fb^{-1} collected with the BESIII detector operating at the Beijing Electron Positron Collider storage ring. Assuming the e^{+}e^{-}→ωχ_{c2} signals come from a single resonance, the mass and width are determined to be M=(4413.6±9.0±0.8)  MeV/c^{2} and Γ=(110.5±15.0±2.9)  MeV, respectively, which is consistent with the parameters of the well-established resonance ψ(4415). In addition, we also use one single resonance to describe the e^{+}e^{-}→ωχ_{c1} line shape and determine the mass and width to be M=(4544.2±18.7±1.7)  MeV/c^{2} and Γ=(116.1±33.5±1.7)  MeV, respectively. The structure of this line shape, observed for the first time, requires further understanding.

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