O. Bakina³⁸, Y. Ban^48,h, H.-R. Bao⁶⁸, V. Batozskaya^1,46, K. Begzsuren³⁴, N. Berger³⁷, M. Berlowski⁴⁶, M. B. Bertani^29a, D. Bettoni^30a, F. Bianchi^79a,79c, E. Bianco^79a,79c, A. Bortone^79a,79c, I. Boyko³⁸, R. A. Briere⁵, A. Brueggemann⁷³, H. Cai⁸¹, M. H. Cai^40,k,l, X. Cai^1,62, A. Calcaterra^29a, G. F. Cao^1,68, N. Cao^1,68, S. A. Cetin^66a, X. Y. Chai^48,h, J. F. Chang^1,62, T. T. Chang⁴⁵, G. R. Che⁴⁵, Y. Z. Che^1,62,68, C. H. Chen⁹, Chao Chen⁵⁸, G. Chen¹, H. S. Chen^1,68, H. Y. Chen²⁰, M. L. Chen^1,62,68, S. J. Chen⁴⁴, S. M. Chen⁶⁵, T. Chen^1,68, X. R. Chen^33,68, X. T. Chen^1,68, X. Y. Chen^11,g, Y. B. Chen^1,62, Y. Q. Chen¹⁵, Z. K. Chen⁶³, J. C. Cheng⁴⁷, L. N. Cheng⁴⁵, S. K. Choi¹⁰, X. Chu^11,g, G. Cibinetto^30a, F. Cossio^79c, J. Cottee-Meldrum⁶⁷, H. L. Dai^1,62, J. P. Dai⁸³, X. C. Dai⁶⁵, A. Dbeyssi¹⁸, R. E. de Boer³, D. Dedovich³⁸, C. Q. Deng⁷⁷, Z. Y. Deng¹, A. Denig³⁷, I. Denisenko³⁸, M. Destefanis^79a,79c, F. De Mori^79a,79c, X. X. Ding^48,h, Y. Ding⁴², Y. X. Ding³¹, J. Dong^1,62, L. Y. Dong^1,68, M. Y. Dong^1,62,68, X. Dong⁸¹, M. C. Du¹, S. X. Du⁸⁵, S. X. Du^11,g, X. L. Du⁸⁵, Y. Y. Duan⁵⁸, Z. H. Duan⁴⁴, P. Egorov^38,b, G. F. Fan⁴⁴, J. J. Fan¹⁹, Y. H. Fan⁴⁷, J. Fang^1,62, J. Fang⁶³, S. S. Fang^1,68, W. X. Fang¹, Y. Q. Fang^1,62,a, L. Fava^79b,79c, F. Feldbauer³, G. Felici^29a, C. Q. Feng^76,62, J. H. Feng¹⁵, L. Feng^40,k,l, Q. X. Feng^40,k,l, Y. T. Feng^76,62, M. Fritsch³, C. D. Fu¹, J. L. Fu⁶⁸, Y. W. Fu^1,68, H. Gao⁶⁸, Y. Gao^76,62, Y. N. Gao^48,h, Y. N. Gao¹⁹, Y. Y. Gao³¹, Z. Gao⁴⁵, S. Garbolino^79c, I. Garzia^30a,30b, L. Ge⁶⁰, P. T. Ge¹⁹, Z. W. Ge⁴⁴, C. Geng⁶³, E. M. Gersabeck⁷², A. Gilman⁷⁴, K. Goetzen¹², J. D. Gong³⁶, L. Gong⁴², W. X. Gong^1,62, W. Gradl³⁷, S. Gramigna^30a,30b, M. Greco^79a,79c, M. D. Gu⁵³, M. H. Gu^1,62, C. Y. Guan^1,68, A. Q. Guo³³, J. N. Guo^11,g, L. B. Guo⁴³, M. J. Guo⁵², R. P. Guo⁵¹, X. Guo⁵², Y. P. Guo^11,g, A. Guskov^38,b, J. Gutierrez²⁸, T. T. Han¹, F. Hanisch³, K. D. Hao^76,62, X. Q. Hao¹⁹, F. A. Harris⁷⁰, C. Z. He^48,h, K. L. He^1,68, F. H. Heinsius³, C. H. Heinz³⁷, Y. K. Heng^1,62,68, C. Herold⁶⁴, P. C. Hong³⁶, G. Y. Hou^1,68, X. T. Hou^1,68, Y. R. Hou⁶⁸, Z. L. Hou¹, H. M. Hu^1,68, J. F. Hu^59,j, Q. P. Hu^76,62, S. L. Hu^11,g, T. Hu^1,62,68, Y. Hu¹, Z. M. Hu⁶³, G. S. Huang^76,62, K. X. Huang⁶³, L. Q. Huang^33,68, P. Huang⁴⁴, X. T. Huang⁵², Y. P. Huang¹, Y. S. Huang⁶³, T. Hussain⁷⁸, N. Hüsken³⁷, N. in der Wiesche⁷³, J. Jackson²⁸, Q. Ji¹, Q. P. Ji¹⁹, W. Ji^1,68, X. B. Ji^1,68, X. L. Ji^1,62, X. Q. Jia⁵², Z. K. Jia^76,62, D. Jiang^1,68, H. B. Jiang⁸¹, P. C. Jiang^48,h, S. J. Jiang⁹, X. S. Jiang^1,62,68, Y. Jiang⁶⁸, J. B. Jiao⁵², J. K. Jiao³⁶, Z. Jiao²⁴, S. Jin⁴⁴, Y. Jin⁷¹, M. Q. Jing^1,68, X. M. Jing⁶⁸, T. Johansson⁸⁰, S. Kabana³⁵, N. Kalantar-Nayestanaki⁶⁹, X. L. Kang⁹, X. S. Kang⁴², M. Kavatsyuk⁶⁹, B. C. Ke⁸⁵, V. Khachatryan²⁸, A. Khoukaz⁷³, O. B. Kolcu^66a, B. Kopf³, L. Kröger⁷³, M. Kuessner³, X. Kui^1,68, N. Kumar²⁷, A. Kupsc^46,80, W. Kühn³⁹, Q. Lan⁷⁷, W. N. Lan¹⁹, T. T. Lei^76,62, M. Lellmann³⁷, T. Lenz³⁷, C. Li⁴⁹, C. Li⁴⁵, C. H. Li⁴³, C. K. Li²⁰, D. M. Li⁸⁵, F. Li^1,62, G. Li¹, H. B. Li^1,68, H. J. Li¹⁹, H. L. Li⁸⁵, H. N. Li^59,j, Hui Li⁴⁵, J. R. Li⁶⁵, J. S. Li⁶³, J. W. Li⁵², K. Li¹, K. L. Li^40,k,l, L. J. Li^1,68, Lei Li⁵⁰, M. H. Li⁴⁵, M. R. Li^1,68, P. L. Li⁶⁸, P. R. Li^40,k,l, Q. M. Li^1,68, Q. X. Li⁵², R. Li^17,33, S. X. Li¹¹, Shanshan Li^26,i, T. Li⁵², T. Y. Li⁴⁵, W. D. Li^1,68, W. G. Li^1,a, X. Li^1,68, X. H. Li^76,62, X. K. Li^48,h, X. L. Li⁵², X. Y. Li^1,8, X. Z. Li⁶³, Y. Li¹⁹, Y. G. Li^48,h, Y. P. Li³⁶, Z. H. Li⁴⁰, Z. J. Li⁶³, Z. X. Li⁴⁵, Z. Y. Li⁸³, C. Liang⁴⁴, H. Liang^76,62, Y. F. Liang⁵⁷, Y. T. Liang^33,68, G. R. Liao¹³, L. B. Liao⁶³, M. H. Liao⁶³, Y. P. Liao^1,68, J. Libby²⁷, A. Limphirat⁶⁴, D. X. Lin^33,68, L. Q. Lin⁴¹, T. Lin¹, B. J. Liu¹, B. X. Liu⁸¹, C. X. Liu¹, F. Liu¹, F. H. Liu⁵⁶, Feng Liu⁶, G. M. Liu^59,j, H. Liu^40,k,l, H. B. Liu¹⁴, H. H. Liu¹, H. M. Liu^1,68, Huihui Liu²¹, J. B. Liu^76,62, J. J. Liu²⁰, K. Liu^40,k,l, K. Liu⁷⁷, K. Y. Liu⁴², Ke Liu²², L. Liu⁴⁰, Liang Liu^76,q, L. C. Liu⁴⁵, Lu Liu⁴⁵, M. H. Liu³⁶, P. L. Liu¹, Q. Liu⁶⁸, S. B. Liu^76,62, W. M. Liu^76,62, W. T. Liu⁴¹, X. Liu^40,k,l, X. K. Liu^40,k,l, X. L. Liu^11,g, X. Y. Liu⁸¹, Y. Liu^40,k,l, Y. Liu⁸⁵, Y. B. Liu⁴⁵, Z. A. Liu^1,62,68, Z. D. Liu⁹, Z. Q. Liu⁵², Z. Y. Liu⁴⁰, X. C. Lou^1,62,68, H. J. Lu²⁴, J. G. Lu^1,62, X. L. Lu¹⁵, Y. Lu⁷, Y. H. Lu^1,68, Y. P. Lu^1,62, Z. H. Lu^1,68, C. L. Luo⁴³, J. R. Luo⁶³, J. S. Luo^1,68, M. X. Luo⁸⁴, T. Luo^11,g, X. L. Luo^1,62, Z. Y. Lv²², X. R. Lyu^68,o, Y. F. Lyu⁴⁵, Y. H. Lyu⁸⁵, F. C. Ma⁴², H. L. Ma¹, Heng Ma^26,i, J. L. Ma^1,68, L. L. Ma⁵², L. R. Ma⁷¹, Q. M. Ma¹, R. Q. Ma^1,68, R. Y. Ma¹⁹, T. Ma^76,62, X. T. Ma^1,68, X. Y. Ma^1,62, Y. M. Ma³³, F. E. Maas¹⁸, I. MacKay⁷⁴, M. Maggiora^79a,79c, S. Malde⁷⁴, Q. A. Malik⁷⁸, H. X. Mao^40,k,l, Y. J. Mao^48,h, Z. P. Mao¹, S. Marcello^79a,79c, A. Marshall⁶⁷, F. M. Melendi^30a,30b, Y. H. Meng⁶⁸, Z. X. Meng⁷¹, G. Mezzadri^30a, H. Miao^1,68, T. J. Min⁴⁴, R. E. Mitchell²⁸, X. H. Mo^1,62,68, B. Moses²⁸, N. Yu. Muchnoi^4,c, J. Muskalla³⁷, Y. Nefedov³⁸, F. Nerling^18,e, H. Neuwirth⁷³, Z. Ning^1,62, S. Nisar³², Q. L. Niu^40,k,l, W. D. Niu^11,g, Y. Niu⁵², C. Normand⁶⁷, S. L. Olsen^10,68, Q. Ouyang^1,62,68, S. Pacetti^29b,29c, X. Pan⁵⁸, Y. Pan⁶⁰, A. Pathak¹⁰, Y. P. Pei^76,62, M. Pelizaeus³, H. P. Peng^76,62, X. J. Peng^40,k,l, Y. Y. Peng^40,k,l, K. Peters^12,e, K. Petridis⁶⁷, J. L. Ping⁴³, R. G. Ping^1,68, S. Plura³⁷, V. Prasad³⁶, F. Z. Qi¹, H. R. Qi⁶⁵, M. Qi⁴⁴, S. Qian^1,62, W. B. Qian⁶⁸, C. F. Qiao⁶⁸, J. H. Qiao¹⁹, J. J. Qin⁷⁷, J. L. Qin⁵⁸, L. Q. Qin¹³, L. Y. Qin^76,62, P. B. Qin⁷⁷, X. P. Qin⁴¹, X. S. Qin⁵², Z. H. Qin^1,62, J. F. Qiu¹, Z. H. Qu⁷⁷, J. Rademacker⁶⁷, C. F. Redmer³⁷, A. Rivetti^79c, M. Rolo^79c, G. Rong^1,68, S. S. Rong^1,68, F. Rosini^29b,29c, Ch. Rosner¹⁸, M. Q. Ruan^1,62, N. Salone^46,p, A. Sarantsev^38,d, Y. Schelhaas³⁷, K. Schoenning⁸⁰, M. Scodeggio^30a, W. Shan²⁵, X. Y. Shan^76,62, Z. J. Shang^40,k,l, J. F. Shangguan¹⁶, L. G. Shao^1,68, M. Shao^76,62, C. P. Shen^11,g, H. F. Shen^1,8, W. H. Shen⁶⁸, X. Y. Shen^1,68, B. A. Shi⁶⁸, H. Shi^76,62, J. L. Shi^11,g, J. Y. Shi¹, S. Y. Shi⁷⁷, X. Shi^1,62, H. L. Song^76,62, J. J. Song¹⁹, M. H. Song⁴⁰, T. Z. Song⁶³, W. M. Song³⁶, Y. X. Song^48,h,m, Zirong Song^26,i, S. Sosio^79a,79c, S. Spataro^79a,79c, S. Stansilaus⁷⁴, F. Stieler³⁷, S. S Su⁴², G. B. Sun⁸¹, G. X. Sun¹, H. Sun⁶⁸, H. K. Sun¹, J. F. Sun¹⁹, K. Sun⁶⁵, L. Sun⁸¹, R. Sun⁷⁶, S. S. Sun^1,68, T. Sun^54,f, W. Y. Sun⁵³, Y. C. Sun⁸¹, Y. H. Sun³¹, Y. J. Sun^76,62, Y. Z. Sun¹, Z. Q. Sun^1,68, Z. T. Sun⁵², C. J. Tang⁵⁷, G. Y. Tang¹, J. Tang⁶³, J. J. Tang^76,62, L. F. Tang⁴¹, Y. A. Tang⁸¹, L. Y. Tao⁷⁷, M. Tat⁷⁴, J. X. Teng^76,62, J. Y. Tian^76,62, W. H. Tian⁶³, Y. Tian³³, Z. F. Tian⁸¹, I. Uman^66b, B. Wang¹, B. Wang⁶³, Bo Wang^76,62, C. Wang^40,k,l, C. Wang¹⁹, Cong Wang²², D. Y. Wang^48,h, H. J. Wang^40,k,l, J. Wang⁹, J. J. Wang⁸¹, J. P. Wang⁵², K. Wang^1,62, L. L. Wang¹, L. W. Wang³⁶, M. Wang⁵², M. Wang^76,62, N. Y. Wang⁶⁸, S. Wang^40,k,l, Shun Wang⁶¹, T. Wang^11,g, T. J. Wang⁴⁵, W. Wang⁶³, W. P. Wang³⁷, X. Wang^48,h, X. F. Wang^40,k,l, X. L. Wang^11,g, X. N. Wang^1,68, Xin Wang^26,i, Y. Wang¹, Y. D. Wang⁴⁷, Y. F. Wang^1,8,68, Y. H. Wang^40,k,l, Y. J. Wang^76,62, Y. L. Wang¹⁹, Y. N. Wang⁴⁷, Y. N. Wang⁸¹, Yaqian Wang¹⁷, Yi Wang⁶⁵, Yuan Wang^17,33, Z. Wang^1,62, Z. Wang⁴⁵, Z. L. Wang², Z. Q. Wang^11,g, Z. Y. Wang^1,68, Ziyi Wang⁶⁸, D. Wei⁴⁵, D. H. Wei¹³, H. R. Wei⁴⁵, F. Weidner⁷³, S. P. Wen¹, U. Wiedner³, G. Wilkinson⁷⁴, M. Wolke⁸⁰, J. F. Wu^1,8, L. H. Wu¹, L. J. Wu¹⁹, Lianjie Wu¹⁹, S. G. Wu^1,68, S. M. Wu⁶⁸, X. Wu^11,g, Y. J. Wu³³, Z. Wu^1,62, L. Xia^76,62, B. H. Xiang^1,68, D. Xiao^40,k,l, G. Y. Xiao⁴⁴, H. Xiao⁷⁷, Y. L. Xiao^11,g, Z. J. Xiao⁴³, C. Xie⁴⁴, K. J. Xie^1,68, Y. Xie⁵², Y. G. Xie^1,62, Y. H. Xie⁶, Z. P. Xie^76,62, T. Y. Xing^1,68, C. J. Xu⁶³, G. F. Xu¹, H. Y. Xu², M. Xu^76,62, Q. J. Xu¹⁶, Q. N. Xu³¹, T. D. Xu⁷⁷, X. P. Xu⁵⁸, Y. Xu^11,g, Y. C. Xu⁸², Z. S. Xu⁶⁸, F. Yan²³, L. Yan^11,g, W. B. Yan^76,62, W. C. Yan⁸⁵, W. H. Yan⁶, W. P. Yan¹⁹, X. Q. Yan^1,68, H. J. Yang^54,f, H. L. Yang³⁶, H. X. Yang¹, J. H. Yang⁴⁴, R. J. Yang¹⁹, Y. Yang^11,g, Y. H. Yang⁴⁴, Y. Q. Yang⁹, Y. Z. Yang¹⁹, Z. P. Yao⁵², M. Ye^1,62, M. H. Ye^8,a, Z. J. Ye^59,j, Junhao Yin⁴⁵, Z. Y. You⁶³, B. X. Yu^1,62,68, C. X. Yu⁴⁵, G. Yu¹², J. S. Yu^26,i, L. W. Yu^11,g, T. Yu⁷⁷, X. D. Yu^48,h, Y. C. Yu⁸⁵, Y. C. Yu⁴⁰, C. Z. Yuan^1,68, H. Yuan^1,68, J. Yuan³⁶, J. Yuan⁴⁷, L. Yuan², M. K. Yuan^11,g, S. H. Yuan⁷⁷, Y. Yuan^1,68, C. X. Yue⁴¹, Ying Yue¹⁹, A. A. Zafar⁷⁸, F. R. Zeng⁵², S. H. Zeng⁶⁷, X. Zeng^11,g, Y. J. Zeng⁶³, Y. J. Zeng^1,68, Y. C. Zhai⁵², Y. H. Zhan⁶³, S. N. Zhang⁷⁴, B. L. Zhang^1,68, B. X. Zhang^1,a, D. H. Zhang⁴⁵, G. Y. Zhang¹⁹, G. Y. Zhang^1,68, H. Zhang^76,62, H. Zhang⁸⁵, H. C. Zhang^1,62,68, H. H. Zhang⁶³, H. Q. Zhang^1,62,68, H. R. Zhang^76,62, H. Y. Zhang^1,62, J. Zhang⁶³, J. J. Zhang⁵⁵, J. L. Zhang²⁰, J. Q. Zhang⁴³, J. S. Zhang^11,g, J. W. Zhang^1,62,68, J. X. Zhang^40,k,l, J. Y. Zhang¹, J. Z. Zhang^1,68, Jianyu Zhang⁶⁸, L. M. Zhang⁶⁵, Lei Zhang⁴⁴, N. Zhang⁸⁵, P. Zhang^1,8, Q. Zhang¹⁹, Q. Y. Zhang³⁶, R. Y. Zhang^40,k,l, S. H. Zhang^1,68, Shulei Zhang^26,i, X. M. Zhang¹, X. Y. Zhang⁵², Y. Zhang¹, Y. Zhang⁷⁷, Y. T. Zhang⁸⁵, Y. H. Zhang^1,62, Y. P. Zhang^76,62, Z. D. Zhang¹, Z. H. Zhang¹, Z. L. Zhang³⁶, Z. L. Zhang⁵⁸, Z. X. Zhang¹⁹, Z. Y. Zhang⁸¹, Z. Y. Zhang⁴⁵, Z. Z. Zhang⁴⁷, Zh. Zh. Zhang¹⁹, G. Zhao¹, J. Y. Zhao^1,68, J. Z. Zhao^1,62, L. Zhao¹, L. Zhao^76,62, M. G. Zhao⁴⁵, S. J. Zhao⁸⁵, Y. B. Zhao^1,62, Y. L. Zhao⁵⁸, Y. X. Zhao^33,68, Z. G. Zhao^76,62, A. Zhemchugov^38,b, B. Zheng⁷⁷, B. M. Zheng³⁶, J. P. Zheng^1,62, W. J. Zheng^1,68, X. R. Zheng¹⁹, Y. H. Zheng^68,o, B. Zhong⁴³, C. Zhong¹⁹, H. Zhou^37,52,n, J. Q. Zhou³⁶, S. Zhou⁶, X. Zhou⁸¹, X. K. Zhou⁶, X. R. Zhou^76,62, X. Y. Zhou⁴¹, Y. X. Zhou⁸², Y. Z. Zhou^11,g, A. N. Zhu⁶⁸, J. Zhu⁴⁵, K. Zhu¹, K. J. Zhu^1,62,68, K. S. Zhu^11,g, L. Zhu³⁶, L. X. Zhu⁶⁸, S. H. Zhu⁷⁵, T. J. Zhu^11,g, W. D. Zhu^11,g, W. J. Zhu¹, W. Z. Zhu¹⁹, Y. C. Zhu^76,62, Z. A. Zhu^1,68, X. Y. Zhuang⁴⁵, J. H. Zou¹, and J. Zu^76,62 (BESIII Collaboration)

• ¹Institute of High Energy Physics, Beijing 100049, People’s Republic of China
• ²Beihang University, Beijing 100191, People’s Republic of China
• ³Bochum Ruhr-University, D-44780 Bochum, Germany
• ⁴Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia
• ⁵Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
• ⁶Central China Normal University, Wuhan 430079, People’s Republic of China
• ⁷Central South University, Changsha 410083, People’s Republic of China
• ⁸China Center of Advanced Science and Technology, Beijing 100190, People’s Republic of China
• ⁹China University of Geosciences, Wuhan 430074, People’s Republic of China
• ¹⁰Chung-Ang University, Seoul, 06974, Republic of Korea
• ¹¹Fudan University, Shanghai 200433, People’s Republic of China
• ¹²GSI Helmholtzcentre for Heavy Ion Research GmbH, D-64291 Darmstadt, Germany
• ¹³Guangxi Normal University, Guilin 541004, People’s Republic of China
• ¹⁴Guangxi University, Nanning 530004, People’s Republic of China
• ¹⁵Guangxi University of Science and Technology, Liuzhou 545006, People’s Republic of China
• ¹⁶Hangzhou Normal University, Hangzhou 310036, People’s Republic of China
• ¹⁷Hebei University, Baoding 071002, People’s Republic of China
• ¹⁸Helmholtz Institute Mainz, Staudinger Weg 18, D-55099 Mainz, Germany
• ¹⁹Henan Normal University, Xinxiang 453007, People’s Republic of China
• ²⁰Henan University, Kaifeng 475004, People’s Republic of China
• ²¹Henan University of Science and Technology, Luoyang 471003, People’s Republic of China
• ²²Henan University of Technology, Zhengzhou 450001, People’s Republic of China
• ²³Hengyang Normal University, Hengyang 421001, People’s Republic of China
• ²⁴Huangshan College, Huangshan 245000, People’s Republic of China
• ²⁵Hunan Normal University, Changsha 410081, People’s Republic of China
• ²⁶Hunan University, Changsha 410082, People’s Republic of China
• ²⁷Indian Institute of Technology Madras, Chennai 600036, India
• ²⁸Indiana University, Bloomington, Indiana 47405, USA
• ^29aINFN Laboratori Nazionali di Frascati, I-00044, Frascati, Italy
• ^29bINFN Sezione di Perugia, I-06100, Perugia, Italy
• ^29cUniversity of Perugia, I-06100, Perugia, Italy
• ^30aINFN Sezione di Ferrara, I-44122, Ferrara, Italy
• ^30bUniversity of Ferrara, I-44122, Ferrara, Italy
• ³¹Inner Mongolia University, Hohhot 010021, People’s Republic of China
• ³²Institute of Business Administration, University Road, Karachi, 75270 Pakistan
• ³³Institute of Modern Physics, Lanzhou 730000, People’s Republic of China
• ³⁴Institute of Physics and Technology, Mongolian Academy of Sciences, Peace Avenue 54B, Ulaanbaatar 13330, Mongolia
• ³⁵Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 7D, Arica 1000000, Chile
• ³⁶Jilin University, Changchun 130012, People’s Republic of China
• ³⁷Johannes Gutenberg University of Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
• ³⁸Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia
• ³⁹Justus-Liebig-Universitaet Giessen, II. Physikalisches Institut, Heinrich-Buff-Ring 16, D-35392 Giessen, Germany
• ⁴⁰Lanzhou University, Lanzhou 730000, People’s Republic of China
• ⁴¹Liaoning Normal University, Dalian 116029, People’s Republic of China
• ⁴²Liaoning University, Shenyang 110036, People’s Republic of China
• ⁴³Nanjing Normal University, Nanjing 210023, People’s Republic of China
• ⁴⁴Nanjing University, Nanjing 210093, People’s Republic of China
• ⁴⁵Nankai University, Tianjin 300071, People’s Republic of China
• ⁴⁶National Centre for Nuclear Research, Warsaw 02-093, Poland
• ⁴⁷North China Electric Power University, Beijing 102206, People’s Republic of China
• ⁴⁸Peking University, Beijing 100871, People’s Republic of China
• ⁴⁹Qufu Normal University, Qufu 273165, People’s Republic of China
• ⁵⁰Renmin University of China, Beijing 100872, People’s Republic of China
• ⁵¹Shandong Normal University, Jinan 250014, People’s Republic of China
• ⁵²Shandong University, Jinan 250100, People’s Republic of China
• ⁵³Shandong University of Technology, Zibo 255000, People’s Republic of China
• ⁵⁴Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
• ⁵⁵Shanxi Normal University, Linfen 041004, People’s Republic of China
• ⁵⁶Shanxi University, Taiyuan 030006, People’s Republic of China
• ⁵⁷Sichuan University, Chengdu 610064, People’s Republic of China
• ⁵⁸Soochow University, Suzhou 215006, People’s Republic of China
• ⁵⁹South China Normal University, Guangzhou 510006, People’s Republic of China
• ⁶⁰Southeast University, Nanjing 211100, People’s Republic of China
• ⁶¹Southwest University of Science and Technology, Mianyang 621010, People’s Republic of China
• ⁶²State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People’s Republic of China
• ⁶³Sun Yat-Sen University, Guangzhou 510275, People’s Republic of China
• ⁶⁴Suranaree University of Technology, University Avenue 111, Nakhon Ratchasima 30000, Thailand
• ⁶⁵Tsinghua University, Beijing 100084, People’s Republic of China
• ^66aTurkish Accelerator Center Particle Factory Group, Istinye University, 34010, Istanbul, Turkey
• ^66bNear East University, Nicosia, North Cyprus, 99138, Mersin 10, Turkey
• ⁶⁷University of Bristol, H H Wills Physics Laboratory, Tyndall Avenue, Bristol, BS8 1TL, United Kingdom
• ⁶⁸University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
• ⁶⁹University of Groningen, NL-9747 AA Groningen, The Netherlands
• ⁷⁰University of Hawaii, Honolulu, Hawaii 96822, USA
• ⁷¹University of Jinan, Jinan 250022, People’s Republic of China
• ⁷²University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
• ⁷³University of Muenster, Wilhelm-Klemm-Strasse 9, 48149 Muenster, Germany
• ⁷⁴University of Oxford, Keble Road, Oxford OX13RH, United Kingdom
• ⁷⁵University of Science and Technology Liaoning, Anshan 114051, People’s Republic of China
• ⁷⁶University of Science and Technology of China, Hefei 230026, People’s Republic of China
• ⁷⁷University of South China, Hengyang 421001, People’s Republic of China
• ⁷⁸University of the Punjab, Lahore-54590, Pakistan
• ^79aUniversity of Turin and INFN, I-10125, Turin, Italy
• ^79bUniversity of Eastern Piedmont, I-15121, Alessandria, Italy
• ^79cINFN, I-10125, Turin, Italy
• ⁸⁰Uppsala University, Box 516, SE-75120 Uppsala, Sweden
• ⁸¹Wuhan University, Wuhan 430072, People’s Republic of China
• ⁸²Yantai University, Yantai 264005, People’s Republic of China
• ⁸³Yunnan University, Kunming 650500, People’s Republic of China
• ⁸⁴Zhejiang University, Hangzhou 310027, People’s Republic of China
• ⁸⁵Zhengzhou University, Zhengzhou 450001, People’s Republic of China

• ^*Full author list given at the end of the Letter.
• ^aDeceased.
• ^bAlso at the Moscow Institute of Physics and Technology, Moscow 141700, Russia.
• ^cAlso at the Novosibirsk State University, Novosibirsk, 630090, Russia.
• ^dAlso at the NRC “Kurchatov Institute,” PNPI, 188300, Gatchina, Russia.
• ^eAlso at Goethe University Frankfurt, 60323 Frankfurt am Main, Germany.
• ^fAlso at Key Laboratory for Particle Physics, Astrophysics and Cosmology, Ministry of Education; Shanghai Key Laboratory for Particle Physics and Cosmology; Institute of Nuclear and Particle Physics, Shanghai 200240, People’s Republic of China.
• ^gAlso at Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) and Institute of Modern Physics, Fudan University, Shanghai 200443, People’s Republic of China.
• ^hAlso at State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People’s Republic of China.
• ⁱAlso at School of Physics and Electronics, Hunan University, Changsha 410082, China.
• ^jAlso at Guangdong Provincial Key Laboratory of Nuclear Science, Institute of Quantum Matter, South China Normal University, Guangzhou 510006, China.
• ^kAlso at MOE Frontiers Science Center for Rare Isotopes, Lanzhou University, Lanzhou 730000, People’s Republic of China.
• ^lAlso at Lanzhou Center for Theoretical Physics, Lanzhou University, Lanzhou 730000, People’s Republic of China.
• ^mAlso at Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
• ⁿAlso at Helmholtz Institute Mainz, Staudinger Weg 18, D-55099 Mainz, Germany.
• ^oAlso at Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China.
• ^pPresent address: Silesian University in Katowice, Chorzow, 41-500, Poland.
• ^qPresent address: Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA.