Open Access

Medina Ablikim, M.N. Achasov, Samer Ahmed, X.C. Ai, O. Albayrak, Malte Albrecht, D.J. Ambrose, Antonio Amoroso, F.F. An, Q. An, J.Z. Bai, Olga Bakina, Rinaldo Baldini Ferroli, Yong Ban, D.W. Bennett, J.V. Bennett, Niklaus Berger, Monica Bertani, Diego Bettoni, J.M. Bian, Fabrizio Bianchi, E. Boger, Igor R. Boyko, Roy A. Briere, H. Cai, X. Cai, O. Cakir, Alessandro Calcaterra, G.F. Cao, Serkant Ali Çetin, J. Chai, Jinfan Chang, Gueorgui A. Chelkov, G. Chen, Hesheng Chen, J.C. Chen, M.L. Chen, S. Chen, S.J. Chen, X. Chen, X.R. Chen, Yuanbo Chen, X.K. Chu, Gianluigi Cibinetto, Hongliang Dai, J.P. Dai, Alaa Dbeyssi, Dmitri V. Dedovich, Ziyan Deng, Achim Denig, Igor Denysenko, Marco Giovanni Maria Destefanis, Francesca De Mori, Y. Ding, C. Dong, J. Dong, Liaoyuan Dong, Mingyi Dong, Z.L. Dou, Shuxian Du, P.F. Duan, J.Z. Fan, J. Fang, Shuangshi Fang, X. Fang, Y. Fang, Riccardo Farinelli, Luciano Fava, Florian Feldbauer, Giulietto Felici, C.Q. Feng, Elisa Fioravanti, Miriam Fritsch, Chengdong Fu, Q. Gao, X.L. Gao, Y. Gao, Z. Gao, I. Garzia, Klaus Goetzen, L. Gong, Wenxuan Gong, Wolfgang Gradl, M. Greco, Minhao Gu, Y.T. Gu, Y.H. Guan, Aiqiang Guo, L.B. Guo, R.P. Guo, Y. Guo, Yuping Guo, Z. Haddadi, A. Hafner, S. Han, Xiqing Hao, F.A. Harris, K.L. He, Fritz-Herbert Heinsius, T. Held, Yuekun Heng, Tobias Holtmann, Zhilong Hou, C. Hu, Haiming Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, Tahir Hussain, Walter Ikegami Andersson, Quan Ji, Qingping Ji, X.B. Ji, X.L. Ji, L.W. Jiang, Xiaoshan Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, Shan Jin, Tord Johansson, A. Julin, Nasser Kalantar-Nayestanaki, Xiaolin Kang, X.S. Kang, Myroslav O. Kavatsyuk, B.C. Ke, P. Kiese, Ralf Kliemt, B. Kloss, Onur Bugra Kolcu, Bertram Kopf, M. Kornicer, Andrzej Kupsc, Wolfgang Kühn, Jens Sören Lange, M. Lara, Paul Larin, H. Leithoff, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, Haibo Li, H.J. Li, J.C. Li, Jin Li, K. Li, K. Li, Lei Li, P.R. Li, Q.Y. Li, T. Li, Weidong Li, Weiguo Li, X.L. Li, X.N. Li, X.Q. Li, Y.B. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, Fu-Hu Liu, Fang Liu, Feng Liu, H.B. Liu, H.H. Liu, H.H. Liu, H.M. Liu, J. Liu, J.B. Liu, J.P. Liu, J.Y. Liu, K. Liu, K.Y. Liu, L.D. Liu, P.L. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Y.Y. Liu, Zhen-An Liu, Zhiqing Liu, H. Loehner, Y.F. Long, Xinchou Lou, H.J. Lu, Junguang Lu, Y. Lu, Yunpeng Lu, Chenglin Luo, M.X. Luo, T. Luo, X.L. Luo, Xiao-Rui Lyu, Fengcai Ma, H.L. Ma, Lianliang Ma, M.M. Ma, Qiumei Ma, T. Ma, X.N. Ma, Xiaoyan Ma, Y.M. Ma, Frank E. Maas, Marco Maggiora, Q.A. Malik, Yajun Mao, Zepu Mao, Simonetta Marcello, Johannes Gerhardus Messchendorp, Giulio Mezzadri, J. Min, T.J. Min, Ryan Edward Mitchell, Xiaohu Mo, Y.J. Mo, C. Morales Morales, G. Morello, Nikolai Yu. Muchnoi, H. Muramatsu, P. Musiol, Yury Nefedov, Frank Nerling, Ivan Borisovich Nikolaev, Z. Ning, Shabana Nisar, S.L. Niu, X.Y. Niu, Stephen L. Olsen, Qun Ouyang, Simone Pacetti, Y. Pan, P. Patteri, Marc Pelizäus, H.P. Peng, Klaus Peters, J. Pettersson, J.L. Ping, R.G. Ping, Ronald Poling, Vindhyawasini Prasad, H.R. Qi, Ming Qi, S. Qian, Congfeng Qiao, L.Q. Qin, N. Qin, X.S. Qin, Zhonghua Qin, Jinfa Qiu, K.H. Rashid, Christoph Florian Redmer, M. Ripka, Gang Rong, Christoph Rosner, X.D. Ruan, Andrei V. Sarantsev, M. Savrié, Claudius Schnier, Karin Schönning, Wei Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, X.Y. Song, Stefano Sosio, Stefano Spataro, Gongxing Sun, J.F. Sun, S.S. Sun, X.H. Sun, Y.J. Sun, Y.Z. Sun, Z.J. Sun, Z.T. Sun, C.J. Tang, X. Tang, I. Tapan, E.H. Thorndike, M. Tiemens, Ismail Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, W. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, Z.Y. Wang, T. Weber, D.H. Wei, P. Weidenkaff, Shuopin Wen, Ulrich Wiedner, Magnus Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Zhenjun Xiao, Y.G. Xie, Y.H. Xie, Q.L. Xiu, Guofa Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, Xinping Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, Hongxun Yang, L. Yang, Yongxu Yang, M. Ye, Minghan Ye, J.H. Yin, Z.Y. You, Boxiang Yu, C.X. Yu, J.S. Yu, Chang-Zheng Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, Y. Zeng, Z. Zeng, B.X. Zhang, B.Y. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, Hongyu Zhang, J. Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, Jianyong Zhang, J.Z. Zhang, K. Zhang, L. Zhang, S.Q. Zhang, X.Y. Zhang, Y. Zhang, Y. Zhang, Y.H. Zhang, Y.N. Zhang, Y.T. Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei Zhao, Ling Zhao, Ming-Gang Zhao, Q. Zhao, Q.W. Zhao, Shujun Zhao, T.C. Zhao, Yubin Zhao, Zhengguo Zhao, Alexey Zhemchugov, B. Zheng, Jianping Zheng, W.J. Zheng, Y.H. Zheng, B. Zhong, L. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, K. Zhu, Kejun Zhu, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Zian Zhu, J. Zhuang, L. Zotti, B.S. Zou, Jiaheng Zou

• We study the decays of J/ψ and ψ(3686) to the final states Σ(1385)0Σ¯(1385)0 and Ξ0Ξ¯0 based on a single baryon tag method using data samples of (1310.6±7.0)×106 J/ψ and (447.9±2.9)×106 ψ(3686) events collected with the BESIII detector at the BEPCII collider. The decays to Σ(1385)0Σ¯(1385)0 are observed for the first time. The measured branching fractions of J/ψ and ψ(3686)→Ξ0Ξ¯0 are in good agreement with, and much more precise, than the previously published results. The angular parameters for these decays are also measured for the first time. The measured angular decay parameter for J/ψ→Σ(1385)0Σ¯(1385)0, α=−0.64±0.03±0.10, is found to be negative, different to the other decay processes in this measurement. In addition, the "12\% rule" and isospin symmetry in the J/ψ and ψ(3686)→ΞΞ¯ and Σ(1385)Σ¯(1385) systems are tested.