Observation of ηc(2S)→K+K−η

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