Observation of ηc(2S)→K+K−η

Nuclear And High Energy Physics

Mathematics

Algorithm

Authors

M. Ablikim,M. Achasov

P. Adlarson,O. Afedulidis,X. Ai,R. Aliberti,A. Amoroso,Q. An,Y. Bai,O. Bakina,I. Balossino,Y. Ban,H. Bao,V. Batozskaya,K. Begzsuren,N. Berger,M. Berlowski,M. Bertani,D. Bettoni,F. Bianchi,Elena Bianco,A. Bortone,I. Boyko,R. Briere,A. Brueggemann,Hao Cai,X.D. Cai,A. Calcaterra,G. Cao,N. Cao,S. Cetin,J. Chang,G. R.,G. Chelkov,C. Chen,Chao Chen,G. Chen,H. Chen,M. Chen,S. Chen,Tao Chen,X. Chen,Y. Chen,Z. Chen,Lei Cheng,S. Choi,G. Cibinetto,F. Cossio,J. Cui,H. Dai,J. Dai,A. Dbeyssi,R. Boer,D. Dedovich,C. Deng,Z. Deng,A. Denig,I. Denysenko,M. Destefanis,F. Mori,B. Ding,Xiaxin Ding,Ye Ding,Y. Ding,J. Dong,L. Dong,M. Dong,X. Dong,M. Du,S. Du,Y. Duan,Z. Duan,P. Egorov,Y. Fan,Jiyu Fang,S. Fang,W. Fang,Y. Fang,Yong Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Feng,J. Feng,Yutong Feng,M. Fritsch,C. Fu,J. Fu,Yu Fu,H. Gao,Xubo Gao,Y. Gao,Yang Gao,S. Garbolino,I. Garzia,L. Ge,P. Ge,Z. Ge,Chao Geng,E. Gersabeck,A. Gilman,K. Goetzen,Lu Gong,W. Gong,W. Gradl,S. Gramigna,M. Greco,M. Gu,Y. Gu,C. Guan,A. Guo,L. Guo,M. Guo,R. Guo,Yahui Guo,A. Guskov,J. Gutierrez,K. Han,T. Han,F. Hanisch,X. Hao,F. Harris,K. He,F. Heinsius,C. Heinz,Y. Heng,C. Herold,T. Holtmann,P. Hong,G. Hou,X. Hou,Y. Hou,Z. Hou,B. Hu,H. Hu,Jiangfeng Hu,S. Hu,T. Hu,Y. Hu,G. Huang,K. Huang,L. Huang,X. Huang,Y. Huang,T. Hussain,F. Hölzken,N. Hüsken,N. Wiesche,J. Jackson,S. Janchiv,J. Jeong,Q. Ji,W. Ji,X. Ji,Xiangdong Ji,Y. Ji,X. Jia,Z. Jiao,D. Jiang,H. Jiang,P. Jiang,S. Jiang,T. Jiang,X. Jiang,Y. Jiang,J. Jiao,S. Jin,Yi Jin,M. Jing,X. Jing,T. Johansson,S. Kabana,N. Kalantar-Nayestanaki,X. Kang,M. Kavatsyuk,B. Ke,Vardan Khachatryan,A. Khoukaz,R. Kiuchi,O. Kolcu,B. Kopf,M. Kuessner,X. Kui,N. Kumar,A. Kupsc,W. Kühn,J. Lane,P. Larin,L. Lavezzi,T. Lei,Z. Lei,M. Lellmann,T. Lenz,C. Li,Cheng Li,D. Li,F. Li,G. Li,H. Li,J. Li,K. Li,L. Li,Lei Li,M. Li,P. Li,Q. Li,R. Li,S. Li,T. Li,W. Li,Xiaoxue Li,X. Li,Y. Li,Z. Li,Yong‐Min Liang,Hai‐Wei Liang,Y. Liang,G. Liao,L. Liao,Y. Liao,J. Libby,A. Limphirat,C. Lin,D. Lin,T. Lin,B. Liu,C. Liu,F. Liu,Feng Liu,G. Liu,H. Liu,Huihui Liu,J. Liu,K. Liu,Ke Liu,L. Liu,Lu Liu,M. Liu,P. Liu,Q. Liu,S. Liu,Ting Liu,W. Liu,X. Liu,Yu Liu,Y. Liu,Z. Liu,X. Lou,F. Lu,H. Lu,J. Lu,X. Lu,Y. Lu,Z. Lu,C. Luo,J. Luo,M. Luo,T. Luo,X. Luo,X. Lyu,Y. Lyu,F. C.,H. Ma,H. Lü,J. L.,L. L.,M. M.,Q. M.,R. Q.,T. Ma,X. T.,X. Y.,Yan-Qing Ma,Y. Mao,F. Maas,M. Maggiora,S. Malde,Z. Mao,S. Marcello,Z. Meng,J. Messchendorp,G. Mezzadri,H. Miao,T. Min,R. Mitchell,X. Mo,B. Moses,N. Muchnoi,J. Muskalla,Y. Nefedov,F. Nerling,L. Nie,I. Nikolaev,Z. Ning,S. Nisar,Q. Niu,W. Niu,Yunyun Niu,S. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Yi Pan,A. Pathak,P. Patteri,Y. Pei,M. Pelizaeus,H. Peng,Y. Peng,K. Peters,J. Ping,R. Ping,S. Plura,V. Prasad,F. Qi,H. Qi,M. Qi,T. Qi,Si-Jin Qian,W. Qian,C. Qiao,X. Qiao,J. Qin,L. Qin,X. Qin,Z. Qin,J. Qiu,Z. Qu,C. Redmer,K. Ren,A. Rivetti,M. Rolo,G. Rong,Ch. Rosner,S. Ruan,N. Salone,A. Sarantsev,Y. Schelhaas,K. Schoenning,M. Scodeggio,K. Shan,W. Shan,X. Shan,Z. Shang,L. Shao,M. Shao,C. Shen,H. Shen,W. Shen,X. Shen,B. Shi,H. Shi,J. Shi,Q. Shi,S. Shi,Xiaofei Shi,J. Song,T. Song,W. Song,Yanan Song,Y. Song,S. Sosio,S. Spataro,F. Stieler,Y. Su,G. Sun,H. Sun,J. Sun,K. Sun,L. Sun,S. Sun,T. Sun,W. Sun,Y. Sun,Zequn Sun,Z. Sun,C. Tang,G. Tang,J. Tang,M. Tang,Y. Tang,L. Tao,Q. Tao,M. Tat,J. Teng,V. Thoren,W. Tian,Y. Tian,Z. Tian,I. Uman,Yan Wan,S. Wang,B. Wang,Bo Wang,D. Wang,F. Wang,H. Wang,Jianjian Wang,J. Wang,K. Wang,L. Wang,M. Wang,N. Wang,T. Wang,W. Wang,X. Wang,Y. Wang,Yaqian Wang,Yi Wang,Z. Wang,D. Wei,F. Weidner,S. Wen,Y. Wen,U. Wiedner,Guy Wilkinson,M. Wolke,L. Wollenberg,C. Wu,J. Wu,L. Wu,X. Wu,Y. Wu,Yue Wu,Z. Wu,L. Xia,X. Xian,B. Xiang,T. Xiang,D. Xiao,G. Xiao,S. Xiao,Y. Xiao,Z. Xiao,Chunyuan Xie,X. Xie,Y. Xie,Z. Xie,T. Xing,C. Xu,G. Xu,H. Xu,M. Xu,Q. Xu,W. Xu,X. Xu,Y. Xu,Zhipeng Xu,Zhe Xu,F. Yan,L. Yan,W. Yan,X. Yan,H. Yang,T. Yang,Y. Yang,Z. Yang,Z. Yao,M. Ye,J. Yin,Z. You,B. Yu,C. Yu,Gang Yu,Jing Yu,Tao Yu,X. Yu,Yu Ye,C. Yuan,Jiahui Yuan,J. Yuan,L. Yuan,S. Yuan,Y. Yuan,Z. Yuan,C. Yue,A. Zafar,F. Zeng,S. Zeng,X. Zeng,Y. Zeng,Yu Zeng,X. Zhai,Y. Zhai,Y. Zhan,A. Zhang,B. Zhang,D. Zhang,G. Zhang,H. Zhang,Haocheng Zhang,Hongrui Zhang,J. Zhang,Junsong Zhang,Jianyu Zhang,L. Zhang,Lei Zhang,P. Zhang,Q. Zhang,R. Zhang,S. Zhang,Shulei Zhang,X. Zhang,Y. Zhang,Yizhuo Zhang,Yan Zhang,Z. Zhang,G. Zhao,J. Zhao,Ling Zhao,Lei Zhao,M. Zhao,Na Zhao,R. Zhao,S. Zhao,Y. Zhao,Z. Zhao,A. Zhemchugov,B. Zheng,J. Zheng,W. Zheng,Y. Zheng,B. Zhong,X. Zhong,N. Zhou,Jianying Zhou,L. Zhou,S. Zhou,X. Zhou,Xingyu Zhou,Xiaokang Zhou,Yu Zhou,Jiang Zhu,K. Zhu,Lei Zhu,Lijie Zhu,S. Zhu,Shanfeng Zhu,T. Zhu,W. Zhu,Y. Zhu,Z. Zhu,J. Zou,J. Zu,Jianmeng Dong

+544 authors

,S. Eidelman

Journal

Physical review. D/Physical review. D.

Published

Nov 12, 2024

DOI

10.1103/physrevd.110.092003

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Abstract

By analyzing (27.12±0.14)×108 ψ(3686) events accumulated with the BESIII detector, the decay ηc(2S)→K+K−η is observed for the first time with a significance of 6.2σ after considering systematic uncertainties. The product of the branching fractions of ψ(3686)→γηc(2S) and ηc(2S)→K+K−η is measured to be B(ψ(3686)→γηc(2S))×B(ηc(2S)→K+K−η)=(2.39±0.32±0.34)×10−6, where the first uncertainty is statistical, and the second one is systematic. The branching fraction of ηc(2S)→K+K−η is determined to be B(ηc(2S)→K+K−η)=(3.42±0.46±0.48±2.44)×10−3, where the third uncertainty is due to the branching fraction of ψ(3686)→γηc(2S). Using a recent BESIII measurement of B(ηc(2S)→K+K−π0), we also determine the ratio between the branching fractions of ηc(2S)→K+K−η and ηc(2S)→K+K−π0 to be 1.49±0.22±0.25, which is consistent with the previous result of at a comparable precision level. Published by the American Physical Society 2024

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