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    Achasov, M. N.; Ahmed, S.; Amoroso, A.; Bai, J. Z.; Bennett, D. W.; Bennett, J. V.; Cai, X.; Calcaterra, A.; Chai, J.; Chen, P. L.; Cibinetto, G.; Dai, H. L.; Dbeyssi, A.; Ding, Y.; Dou, Z. L.; Fang, Y.; Farinelli, R.; Felici, G.; Gao, Z.; Greco, M.; Gu, M. H.; Harris, F. A.; He, X. Q.; Heng, Y. K.; Hou, Z. L.; Huang, G. S.; Huang, X. T.; Huang, X. Z.; Ji, Q. P.; Ji, X. B.; Jiao, J. B.; Jin, D. P.; Kuemmel, M.; Kuhlmann, M.; Lange, J. S.; Larin, P.; Li, H. J.; Li, J. W.; Li, Ke; Li, X. Q.; Li, Z. B.; Liang, H.; Libby, J.; Liu, H. M.; Liu, Huanhuan; Liu, Huihui; Liu, J. Y.; Liu, L. D.; Liu, X.; Liu, Y. B.; Luo, M. X.; Ma, Q. M.; Messchendorp, J. G.; Mo, X. H.; Morales Morales, C.; Muchnoi, N. Yu; Ouyang, Q.; Peng, H. P.; Ping, J. L.; Poling, R.; Redmer, C. F.; Rolo, M.; Rong, G.; Shi, X.; Sun, G. X.; Sun, X. H.; Tang, G. Y.; Tapan, I.; Wang, D.; Wang, Dan; Wang, K.; Wang, W. P.; Wang, X. F.; Wang, Y.; Wang, Z.; Wen, S. P.; Xia, L.; Xiao, Y. J.; Xu, Q. J.; Yang, Y. H.; Yang, Yifan; Yu, B. X.; Yu, C. X.; Zeng, Z.; Zhang, C. C.; Zhang, H. H.; Zhang, J. Z.; Zhang, L.; Zhang, Yang; Zhang, Yao; Zhang, Yu; Zhao, Ling; Zhao, Q.; Zhemchugov, A.; Zhong, B.; Zhou, Q.; Zhu, J.; Zhu, K. J.; Zhu, S. H.; Zhu, Y. S.

    Physical review letters, 03/2018, Letnik: 120, Številka: 13
    Journal Article

    The cross section of the e+e−→Λc+Λ¯c− process is measured with unprecedented precision using data collected with the BESIII detector at /¯s=4574.5, 4580.0, 4590.0 and 4599.5 MeV. The nonzero cross section near the Λc+Λ¯c− production threshold is cleared. At center-of-mass energies /¯s=4574.5 and 4599.5 MeV, the higher statistics data enable us to measure the Λc polar angle distributions. From these, the Λc electric over magnetic form-factor ratios (|GE/GM|) are measured for the first time. They are found to be 1.14±0.14±0.07 and 1.23±0.05±0.03, respectively, where the first uncertainties are statistical and the second are systematic.