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Medina Ablikim, Mikhail N. Achasov, Patrik Adlarson, Samer Ahmed, Malte Albrecht, M. Alekseev, Antonio Amoroso, Fenfen An, Qi An, Y. Bai, Olga Bakina, Rinaldo Baldini Ferroli, Ilaria Balossino, Yong Ban, Khurelbaatar Begzsuren, Jake V. Bennett, Niklaus Berger, Monica Bertani, Diego Bettoni, Fabrizio Bianchi, Jacek Biernat, Johannes Bloms, Igor R. Boyko, Roy A. Briere, H. Cai, Xiao Cai, Alessandro Calcaterra, G. F. Cao, Ning Cao, Serkant Ali Çetin, J. Chai, Jinfan Chang, W. L. Chang, Gueorgui A. Chelkov, D. Y. Chen, G. Chen, Hesheng Chen, Jing Chen, M. L. Chen, S. J. Chen, X. R. Chen, Yuanbo Chen, W. Cheng, Gianluigi Cibinetto, Fabio Cossio, X. F. Cui, Hongliang Dai, J. P. Dai, Xinchen 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, J. Z. Fan, J. Fang, Shuangshi Fang, Y. Fang, Riccardo Farinelli, Luciano Fava, Florian Feldbauer, Giulietto Felici, C. Q. Feng, Miriam Fritsch, Chengdong Fu, Ying Fu, Q. Gao, X. L. Gao, Y. Gao, Y. Gao, Y. G. Gao, B. Garillon, Isabella Garzia, Evelina Gersabeck, Alexander Gilman, Klaus Goetzen, L. Gong, Wenxuan Gong, Wolfgang Gradl, M. Greco, L. M. Gu, Minhao Gu, S. Gu, Y. T. Gu, Aiqiang Guo, L. B. Guo, Rupan Guo, Yuping Guo, Alexey Guskov, S. Han, Xiqing Hao, Frederick Allan Harris, K. L. He, Fritz-Herbert Heinsius, T. Held, Yuekun Heng, Mathilde Himmelreich, Y. R. Hou, Zhilong Hou, Haiming Hu, J. F. Hu, T. Hu, Y. Hu, G. S. Huang, J. S. Huang, Xingtao Huang, X. Z. Huang, Nils Huesken, Tahir Hussain, Walter Ikegami Andersson, William Imoehl, Muzaffar Irshad, Quan Ji, Qingping Ji, X. B. Ji, X. L. Ji, H. L. Jiang, Xiaoshan Jiang, X. Y. Jiang, J. B. Jiao, Zheng Jiao, D. P. Jin, Shan Jin, Y. Jin, Tord Johansson, Nasser Kalantar-Nayestanaki, Xiaolin Kang, Rosa Kappert, Myroslav O. Kavatsyuk, Bai-Cian Ke, Iman Keshk, Alfons Khoukaz, P. Kiese, Ryuta Kiuchi, Ralf Kliemt, Leonard Koch, Onur Bugra Kolcu, Bertram Kopf, Miriam Kümmel, Meike Küßner, Andrzej Kupsc, M. Kurth, M. G. Kurth, Wolfgang Kühn, Jens Sören Lange, Paul Larin, Lia Lavezzi, Hans Heinrich Leithoff, Thomas Lenz, C. Li, Chunhua Li, Cheng Li, D. M. Li, F. Li, G. Li, Haibo Li, Huijing Li, J. C. Li, Ke Li, L. K. Li, Lei Li, P. L. Li, Peirong Li, Weidong Li, Weiguo Li, X. H. Li, X. L. Li, X. N. Li, Z. B. Li, Z. Y. Li, H. Liang, H. Liang, Y. F. Liang, Y. T. Liang, Guangrui Liao, L. Z. Liao, J. Libby, C. X. Lin, D. X. Lin, Y. J. Lin, B. Liu, B. J. Liu, C. X. Liu, D. Liu, D. Y. Liu, Fu-Hu Liu, Fang Liu, Feng Liu, H. B. Liu, H. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. Y. Liu, K. Liu, K. Y. Liu, Ke Liu, L. Y. Liu, Q. Liu, S. B. Liu, Tong Liu, X. Liu, X. Y. Liu, Y. B. Liu, Zhen-An Liu, Zhiqing Liu, Y. F. Long, Xinchou Lou, H. J. Lu, J. D. Lu, Junguang Lu, Y. Lu, Yunpeng Lu, Chenglin Luo, M. X. Luo, P. W. Luo, Tao Luo, X. L. Luo, Stefano Lusso, Xiao-Rui Lyu, Fengcai Ma, Hailong Ma, Lianliang Ma, M. M. Ma, Qiumei Ma, X. N. Ma, X. X. Ma, Xiaoyan Ma, Y. M. Ma, Frank E. Maas, Marco Maggiora, Stephan Maldaner, Sneha Malde, Qadeer Afzal Malik, Alessio Mangoni, Yajun Mao, Zepu Mao, Simonetta Marcello, Z. X. Meng, Johannes Gerhardus Messchendorp, Giulio Mezzadri, J. Min, T. J. Min, Ryan Edward Mitchell, Xiaohu Mo, Y. J. Mo, C. Morales Morales, Nikolai Yu. Muchnoi, Hajime Muramatsu, A. Mustafa, Simon Nakhoul, Yury Nefedov, Frank Nerling, Ivan Borisovich Nikolaev, Z. Ning, Shabana Nisar, S. L. Niu, Stephen L. Olsen, Qun Ouyang, Simone Pacetti, Y. Pan, Michael Papenbrock, Piero Patteri, Marc Pelizäus, H. P. Peng, Klaus Peters, J. Pettersson, J. L. Ping, R. G. Ping, A. Pitka, Ronald Poling, Vindhyawasini Prasad, Ming Qi, S. Qian, Congfeng Qiao, Xiaoping Qin, X. S. Qin, Zhonghua Qin, Jinfa Qiu, S. Q. Qu, K. H. Rashid, Krishnakumar Ravindran, Christoph Florian Redmer, M. Richter, Angelo Rivetti, Viktor Rodin, Manuel Dionisio Da Rocha Rolo, Gang Rong, Christoph Rosner, Marcel Andre Rump, Andrei V. Sarantsev, M. Savrié, Yasemin Schelhaas, Karin Schönning, Wei Shan, Xinyu Shan, M. Shao, Chengping Shen, P. X. Shen, X. Y. Shen, H. Y. Sheng, X. Shi, Xiaodong Shi, J. J. Song, Q. Q. Song, X. Y. Song, Stefano Sosio, C. Sowa, Stefano Spataro, F. F. Sui, Gongxing Sun, J. F. Sun, Liang Sun, S. S. Sun, X. H. Sun, Y. J. Sun, Y. K. Sun, Y. Z. Sun, Z. J. Sun, Z. T. Sun, Y. T. Tan, C. J. Tang, G. Y. Tang, X. Tang, Viktor Thoren, B. Tsednee, Ismail Uman, B. Wang, B. L. Wang, Chengwei Wang, D. Y. Wang, K. Wang, Liangliang Wang, L. S. Wang, M. Wang, M. Z. Wang, Meng Wang, P. L. Wang, R. M. Wang, Weiping Wang, X. Wang, Xiongfei Wang, X. L. Wang, Y. Wang, Y. Wang, Y. F. Wang, Y. Q. Wang, Z. Wang, Z. G. Wang, Z. Y. Wang, Z. Y. Wang, Zongyuan Wang, T. Weber, D. H. Wei, P. Weidenkaff, Frederik Weidner, H. W. Wen, Shuopin Wen, Ulrich Wiedner, Guy Wilkinson, Magnus Wolke, Linghui Wu, Lianjin Wu, Z. Wu, L. Xia, Y. Xia, S. Y. Xiao, Y. J. Xiao, Zhenjun Xiao, Y. G. Xie, Y. H. Xie, T. Y. Xing, X. A. Xiong, Q. L. Xiu, Guofa Xu, J. J. Xu, L. Xu, Q. J. Xu, Wei Xu, Xinping Xu, F. Yan, Liang Yan, W. B. Yan, Wencheng Yan, Y. H. Yan, H. J. Yang, Hongxun Yang, L. Yang, R. X. Yang, S. L. Yang, Y. H. Yang, Yongxu Yang, Yifan Yang, Z. Q. Yang, Zhi Yang, M. Ye, Minghan Ye, J. H. Yin, Z. Y. You, Boxiang Yu, Chunxu Yu, J. S. Yu, T. Yu, Chang-Zheng Yuan, X. Q. Yuan, Ye Yuan, C. X. Yue, A. Yuncu, A. A. Zafar, Y. Zeng, B. X. Zhang, B. Y. Zhang, C. C. Zhang, D. H. Zhang, H. H. Zhang, Hongyu Zhang, J. Zhang, J. L. Zhang, Jingqing Zhang, Jiawei Zhang, Jianyong Zhang, J. Z. Zhang, K. Zhang, L. Zhang, Lei Zhang, Sifan Zhang, T. J. Zhang, X. Y. Zhang, Y. Zhang, Y. H. Zhang, Yateng Zhang, Yang Zhang, Yao Zhang, Yi Zhang, Yu Zhang, Z. H. Zhang, Z. P. Zhang, Z. Y. Zhang, G. Zhao, J. Zhao, J. W. Zhao, Jingyi Zhao, J. Z. Zhao, Lei Zhao, Ling Zhao, Ming-Gang Zhao, Q. Zhao, Shujun Zhao, T. C. Zhao, Yubin Zhao, Zhengguo Zhao, Alexey Zhemchugov, Bo Zheng, Jianping Zheng, Y. Zheng, Y. H. Zheng, B. Zhong, L. Zhou, L. P. Zhou, Q. Zhou, X. Zhou, X. K. Zhou, X. R. Zhou, Xiaoyu Zhou, Xu Zhou, A. N. Zhu, J. Zhu, J. Zhu, K. Zhu, Kejun Zhu, S. H. Zhu, W. J. Zhu, X. L. Zhu, Y. C. Zhu, Y. S. Zhu, Zian Zhu, J. Zhuang, B. S. Zou, Jiaheng Zou

• Using a data sample of (448.1±2.9)×106 ψ(3686) decays collected by the BESIII detector at the Beijing Electron Positron Collider (BEPCII), we observe the decays χcJ→ϕϕη (J=0, 1, 2), where the χcJ are produced via the radiative processes ψ(3686)→γχcJ. The branching fractions are measured to be B(χc0→ϕϕη)=(8.41±0.74±0.62)×10−4, B(χc1→ϕϕη)=(2.96±0.43±0.22)×10−4, and B(χc2→ϕϕη)=(5.33±0.52±0.39)×10−4, where the first uncertainties are statistical and the second are systematic. We also search for intermediate states in the ϕϕ or ηϕ combinations, but no significant structure is seen due to the limited statistics.