Measurement of the absolute branching fraction of the inclusive decay Λ¯c−→n¯+X
M. Ablikim,М. Н. Ачасов,P. Adlarson,M. Albrecht,R. Aliberti,A. Amoroso,M. R. An,Q. An,X. H. Bai,Y. Bai,O. Bakina,R. Baldini Ferroli,I. Balossino,Y. Ban,V. Batozskaya,D. Becker,K. Begzsuren,N. Berger,M. Bertani,D. Bettoni,F. Bianchi,J. Bloms,A. Bortone,I. R. Boyko,R. A. Briere,A. Brueggemann,H. Cai,X. Cai,A. Calcaterra,G. F. Cao,N. Cao,S. A. Çetin,J. F. Chang,W. L. Chang,G. A. Chelkov,C. Chen,Chao Chen,G. Chen,H. S. Chen,M. L. Chen,S. J. Chen,S. M. Chen,T. Chen,X. R. Chen,X. T. Chen,Y. B. Chen,Z. J. Chen,W. S. Cheng,S. K. Choi,X. K. Chu,G. Cibinetto,F. Cossio,J. J. Cui,H. L. Dai,J. P. Dai,A. Dbeyssi,R. E. de Boer,D. Dedovich,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,Y. Ding,J. Dong,L. Y. Dong,M. Y. Dong,X. Dong,S. X. Du,P. Egorov,Y. L. Fan,J. Fang,S. S. Fang,W. Fang,Y. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Q. Feng,J. H. Feng,K. M. Fischer,M. Fritsch,C. Fritzsch,C. D. Fu,H. Gao,Yang Gao,Yang Gao,S. Garbolino,I. Garzia,P. Ge,Z. W. Ge,C. Q. Geng,E. M. Gersabeck,A. Gilman,K. Goetzen,L. Gong,W. X. Gong,W. Gradl,M. Greco,L. M. Gu,M. H. Gu,Y. T. Gu,C. Y. Guan,A. Q. Guo,L. B. Guo,R. P. Guo,Y. P. Guo,A. Guskov,Tao Han,W. Y. Han,X. Q. Hao,F. A. Harris,K. K. He,K. L. He,F. H. Heinsius,C. Heinz,Y. K. Heng,C. Herold,G. Y. Hou,Y. R. Hou,Z. L. Hou,H. M. Hu,J. F. Hu,T. Hu,Y. Hu,G. S. Huang,K. X. Huang,L. Q. Huang,X. T. Huang,Y. Huang,Z. Huang,T. Hussain,N. Hüsken,W. Imoehl,M. Irshad,J. Jackson,S. Jaeger,S. Janchiv,E.-J. Jang,J. H. Jeong,Q. P. Ji,Q. Ji,X. B. Ji,X. L. Ji,Y. Y. Ji,Z. K. Jia,H. B. Jiang,S. S. Jiang,X. S. Jiang,Y. Jiang,J. B. Jiao,Z. Jiao,S. Jin,Y. Jin,M. Q. Jing,T. Johansson,N. Kalantar–Nayestanaki,X. S. Kang,R. Kappert,M. Kavatsyuk,B. C. Ke,I. K. Keshk,A. Khoukaz,R. Kiuchi,R. Kliemt,L. Koch,O. B. Kolcu,B. Kopf,M. Kuemmel,M. Kuessner,A. Kupść,W. Kühn,J. J. Lane,J. S. Lange,P. Larin,A. Lavania,L. Lavezzi,Z. H. Lei,H. Leithoff,M. Lellmann,T. Lenz,C. Li,C. Li,C. H. Li,Cheng Li,D. M. Li,F. Li,G. Li,H. Li,H. Li,H. B. Li,H. J. Li,H. N. Li,J. Q. Li,J. S. Li,J. W. Li,Ké Li,L. J. Li,L. K. Li,L. K. Li,M. H. Li,P. R. Li,S. X. Li,S. Y. Li,T. Li,W. D. Li,W. G. Li,X. H. Li,X. L. Li,Xiaoyü Li,Y. G. Li,Z. X. Li,Han Liu,Han Liu,Han Liu,Y. F. Liang,Y. T. Liang,G. R. Liao,L. Z. Liao,J. Libby,A. Limphirat,C. X. Lin,D. X. Lin,Tsau Young Lin,B. J. Liu,C. X. Liu,D. Liu,F. H. Liu,Fang Liu,Feng Liu,G. M. Liu,H. Liu,H. B. Liu,H. M. Liu,Huanhuan Liu,Huihui Liu,J. B. Liu,J. L. Liu,J. Y. Liu,K. Liu,K. Y. Liu,Ke Liu,Lu Liu,Lu Liu,M. H. Liu,P. L. Liu,Q. Liu,S. B. Liu,T. Liu,W. K. Liu,W. M. Liu,X. Liu,Yong Liu,Y. B. Liu,Z. A. Liu,Z. Q. Liu,X. Lou,F. X. Lu,H. J. Lü,J. G. Lü,X. L. Lu,Y. P. Lu,Y. P. Lu,Z. H. Lu,C. L. Luo,M. X. Luo,T. Luo,X. L. Luo,X. R. Lyu,Y. F. Lyu,F. C.,H. L.,L. L.,M. M.,Q. M.,R. Q.,R. T.,X. Y.,Yan Ma,F. E. Maas,M. Maggiora,S. Maldaner,S. Malde,Q. A. Malik,A. Mangoni,Y. J. Mao,Z. P. Mao,S. Marcello,Z. Meng,J. G. Messchendorp,G. Mezzadri,H. Miao,T. J. Min,R. E. Mitchell,X. H. Mo,N. Yu. Muchnoi,Y. Nefedov,F. Nerling,I. B. Nikolaev,Z. Ning,S. Nisar,Y. Niu,S. L. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Y. Pan,A. Pathak,M. Pelizaeus,H. Peng,K. Peters,J. L. Ping,R. G. Ping,S. Plura,S. Pogodin,V. Prasad,F. Z. Qi,H. R. Qi,H. R. Qi,M. Qi,T. Y. Qi,S. J. Qian,W. Qian,Z. Qian,C. F. Qiao,J. Qin,Qin Liu,X. P. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,S. Q. Qu,K. H. Rashid,C. F. Redmer,K. J. Ren,A. Rivetti,V. Rodin,M. Rolo,G. Rong,Ch. Rosner,S. N. Ruan,H. S. Sang,A. Sarantsev,Y. Schelhaas,C. Schnier,K. Schoenning,M. Scodeggio,K. Y. Shan,W. Shan,X. Y. Shan,J. F. Shangguan,L. G. Shao,M. Shao,C. P. Shen,H. F. Shen,X. Y. Shen,B. A. Shi,H. C. Shi,John Shi,Q. Q. Shi,R. S. Shi,X. Shi,X. Shi,J. J. Song,W. M. Song,Y. X. Song,S. Sosio,S. Spataro,F. Stieler,K. X. Su,P. P. Su,Y. J. Su,G. X. Sun,H. K. Sun,H. K. Sun,J. F. Sun,L. Sun,S. S. Sun,T. Sun,W. Y. Sun,X. Sun,Y. J. Sun,Y. Z. Sun,Z. T. Sun,Y. H. Tan,Y. X. Tan,C. J. Tang,G. Y. Tang,J. Tang,L. Y. Tao,Q. T. Tao,M. D. Tat,J. X. Teng,V. Thoren,W. H. Tian,Y. Tian,I. Uman,B. Wang,B. L. Wang,C. W. Wang,D. Y. Wang,Fan Wang,H. J. Wang,H. P. Wang,K. Wang,L. L. Wang,M. Wang,M. Z. Wang,Meng Wang,S. Wang,S. Wang,T. Wang,T. J. Wang,W. Wang,W. H. Wang,W. P. Wang,X. Wang,X. F. Wang,X. L. Wang,Y. Wang,Y. D. Wang,Y. F. Wang,Y. H. Wang,Y. Q. Wang,Yaqian Wang,Z. Wang,Z. Y. Wang,Ziyi Wang,D. H. Wei,F. Weidner,S. P. Wen,D. J. White,U. Wiedner,G. Wilkinson,M. Wolke,L. Wollenberg,Jian Wu,L. H. Wu,L. J. Wu,X. Wu,X. Wu,Y. Wu,Y. Wu,Z. Wu,L. Xia,T. Xiang,D. Xiao,G. Y. Xiao,H. Xiao,S. Y. Xiao,Y. L. Xiao,Z. J. Xiao,Changsheng Xie,X. H. Xie,Y. Xie,Y. Xie,Y. Xie,Z. P. Xie,T. Y. Xing,Chun Xu,C. J. Xu,G. F. Xu,H. Y. Xu,Q. J. Xu,X. P. Xu,Y. C. Xu,Z. P. Xu,F. Yan,L. Yan,W. B. Yan,W. C. Yan,H. J. Yang,H. L. Yang,H. X. Yang,L. Yang,S. L. Yang,Tao Yang,Yifan Yang,Yifan Yang,Yifan Yang,M. Ye,M. H. Ye,J. H. Yin,Z. Y. You,B. X. Yu,C. X. Yu,G. Yu,T. Yu,X. D. Yu,C. Z. Yuan,L. Yuan,S. Yuan,X. Q. Yuan,Y. Yuan,Z. Y. Yuan,C. X. Yue,A. A. Zafar,F. R. Zeng,X. Zeng,Y. Zeng,Y. H. Zhan,A. Q. Zhang,B. L. Zhang,B. X. Zhang,D. H. Zhang,G. Y. Zhang,H. Zhang,H. H. Zhang,H. H. Zhang,H. Y. Zhang,J. L. Zhang,J. Q. Zhang,J. W. Zhang,J. X. Zhang,J. Y. Zhang,J. Z. Zhang,Jianyu Zhang,Jiawei Zhang,L. M. Zhang,L. Q. Zhang,Lei Zhang,P. Zhang,Q. Y. Zhang,Shuihan Zhang,Shulei Zhang,X. D. Zhang,X. M. Zhang,X. Y. Zhang,X. Y. Zhang,Y. Zhang,Y. T. Zhang,Y. H. Zhang,Yan Zhang,Yao Zhang,Z. H. Zhang,Z. Y. Zhang,Z. Y. Zhang,G. Zhao,J. Zhao,J. Zhao,J. Zhao,Zhao Liu,Ling Zhao,M. G. Zhao,S. J. Zhao,Y. B. Zhao,Y. X. Zhao,Z. Zhao,A. Zhemchugov,B. Zheng,J. P. Zheng,Y. Zheng,B. Zhong,Zhong Chen,X. Zhong,H. Zhou,Zhou Li,X. R. Zhou,X. K. Zhou,X. R. Zhou,Xiang Zhou,Y. Z. Zhou,J. Zhu,K. J. Zhu,K. J. Zhu,L. X. Zhu,S. H. Zhu,S. Q. Zhu,T. J. Zhu,W. J. Zhu,Y. Zhu,Z. A. Zhu,J. H. Zou
Physical review（2023）
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摘要
Based on ${e}^{+}{e}^{\ensuremath{-}}$ collision data corresponding to an integrated luminosity of $4.5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected at the center-of-mass energies between 4.600 and 4.699 GeV with the BESIII detector at BEPCII, the absolute branching fraction of the inclusive decay ${\overline{\mathrm{\ensuremath{\Lambda}}}}_{c}^{\ensuremath{-}}\ensuremath{\rightarrow}\overline{n}+X$, where $X$ refers to any possible final state particles, is measured. The absolute branching fraction is determined to be $\mathcal{B}({\overline{\mathrm{\ensuremath{\Lambda}}}}_{c}^{\ensuremath{-}}\ensuremath{\rightarrow}\overline{n}+X)=(32.4\ifmmode\pm\else\textpm\fi{}0.7\ifmmode\pm\else\textpm\fi{}1.5)%$, where the first uncertainty is statistical and the second systematic. Assuming $CP$ symmetry, the measurement indicates that about one fourth of ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}$ (${\overline{\mathrm{\ensuremath{\Lambda}}}}_{c}^{\ensuremath{-}}$) decay modes with a neutron (an antineutron) in the final state have not been observed.
