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  • Determination of the Λ c + ...
    Achasov, M. N.; Ahmed, S.; Amoroso, A.; Ban, Y.; Cai, X.; Calcaterra, A.; Chen, H. S.; Chen, Z. J.; De Mori, F.; Fava, L.; Felici, G.; Greco, M.; Gu, L. M.; Hao, X. Q.; He, K. L.; Himmelreich, M.; Hou, Z. L.; Hu, H. M.; Hu, T.; Andersson, W. Ikegami; Janchiv, S.; Jiang, X. S.; Jiao, Z.; Jin, Y.; Jing, M. Q.; Kliemt, R.; Kupsc, A.; Kurth, M. G.; Lavezzi, L.; Leithoff, H.; Lellmann, M.; Li, C.; Li, F.; Li, J. Q.; Li, W. D.; Liao, G. R.; Liu, B. J.; Liu, Feng; Liu, S. B.; Liu, X.; Liu, Y. B.; Luo, M. X.; Luo, T.; Lyu, X. R.; Maldaner, S.; Min, T. J.; Mitchell, R. E.; Mo, Y. J.; Muramatsu, H.; Nakhoul, S.; Nerling, F.; Pan, X.; Ping, R. G.; Qin, X. P.; Rashid, K. H.; Sang, H. S.; Schnier, C.; Shen, H. F.; Shi, H. C.; Song, W. M.; Spataro, S.; Su, P. P.; Sun, Y. J.; Sun, Y. K.; Sun, Z. T.; Tang, J.; Tian, Y. T.; Wang, W. P.; Wang, X. F.; Wang, Y.; Wollenberg, L.; Xing, T. Y.; Yan, F.; Yan, W. C.; Yang, Y. X.; Yang, Yifan; Yang, Zhi; Ye, M.; Yu, T.; Yuan, L.; Yuan, Y.; Yue, C. X.; Zeng, Y.; Zhang, Guangyi; Zhang, H. H.; Zhang, J. J.; Zhang, Jiawei; Zhang, L. Q.; Zhang, Lei; Zhang, S.; Zhang, X. Y.; Zhang, Y. T.; Zhao, G.; Zhao, J.; Zhao, Q.; Zheng, J. P.; Zheng, Y. H.; Zhou, L. P.; Zhou, X. R.; Zou, J. H.

    Physical review. D, 05/2021, Letnik: 103, Številka: 9
    Journal Article

    We report on a comparison of two possible Λ+c spin hypotheses, J = 1/2 and 3/2, via the process e+e− → Λ+ c¯Λ−c , using the angular distributions of Λ+c decays into pK0S , Λπ+, Σ0π+, and Σ+π0. The data were recorded at √ s = 4.6 GeV with the BESIII detector and correspond to an integrated luminosity of 587 pb−1. The Λ+c spin is determined to be J = 1/2, with this value favored over the 3/2 hypothesis with a significance corresponding to more than 6 Gaussian standard deviations.