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Achasov, M. N.; Amoroso, A.; Bertani, M.; Cai, X.; Calcaterra, A.; Chang, T. T.; Che, G. R.; Chen, C.; Chen, M. L.; Chen, Y. B.; Cheng, W. S.; Coen, S. C.; Dai, H. L.; Fang, S. S.; Fang, W. X.; Feng, C. Q.; Fu, C. D.; Fu, J. L.; Ge, P. T.; Gong, L.; Gong, W. X.; Gramigna, S.; Guan, Z. L.; Guskov, A.; He, K. K.; Hou, X. T.; Hou, Z. L.; Hu, T.; Janchiv, S.; Jiao, J. B.; Jin, S.; Kopf, B.; Kühn, W.; Lenz, T.; Li, C. H.; Li, Cheng; Liao, G. R.; Libby, J.; Liu, B. X.; Liu, H.; Liu, L.; Liu, L. C.; Liu, Q.; Liu, W. K.; Lu, X. L.; Luo, M. X.; Ma, L. L.; Ma, Q. M.; Ma, Y.; Mao, Y. J.; Meng, Z. X.; Nerling, F.; Pelizaeus, M.; Peters, K.; Pogodin, S.; Qi, M.; Qi, T. Y.; Qian, S.; Salone, N.; Scodeggio, M.; Shen, H. F.; Shen, X. Y.; Shi, B. A.; Shi, H. C.; Song, J. J.; Sun, G. X.; Tian, Z. F.; Wang, D. Y.; Wang, H. J.; Wang, J. P.; Wang, Meng; Wang, T. J.; Wang, Y. Q.; Wang, Yaqian; Wang, Z.; Wollenberg, L.; Xian, X. M.; Xiao, G. Y.; Yan, W. B.; Yang, Tao; Yu, X. D.; Yuan, L.; Yuan, Z. Y.; Yue, C. X.; Zhai, X. Y.; Zhang, H. Y.; Zhang, J. Q.; Zhang, P.; Zhang, Shulei; Zhang, X. D.; Zhao, Ling; Zhemchugov, A.; Zheng, W. J.; Zhong, B.; Zhong, X.; Zhou, H.; Zhou, L. P.; Zhou, X. R.; Zhu, K.; Zhu, Y. C.
Physical review letters, 2024, Letnik: 132, Številka: 3Journal Article
Based on 4.4 fb -1 of e + e - annihilation data collected at the center-of-mass energies between 4.60 and 4.70 GeV with the BESIII detector at the BEPCII collider, the pure W-boson-exchange decay Λ c + → Ξ 0 K + is studied with a full angular analysis. The corresponding decay asymmetry is measured for the first time to be α Ξ 0 K + = 0.01 ± 0.16(stat) ± 0.03(syst). This result reflects the noninterference effect between the S- and P-wave amplitudes. The phase shift between S- and P-wave amplitudes has two solutions, which are δ p - δ s = -1.55 ± 0.25(stat) ± 0.05(syst) rad or 1.59 ± 0.25(stat) ± 0.05(syst) rad.
