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Medina Ablikim, Mikhail N. Achasov, Patrik Adlarson, Samer Ahmed, Malte Albrecht, Riccardo Aliberti, Antonio Amoroso, M. R. An, Qi An, Xuhong Bai, Yu Bai, Olga Bakina, Rinaldo Baldini Ferroli, Ilaria Balossino, Yong Ban, Khurelbaatar Begzsuren, Niklaus Berger, Monica Bertani, Diego Bettoni, Fabrizio Bianchi, Jacek Biernat, Johannes Bloms, Alberto Bortone, Igor R. Boyko, Roy A. Briere, Hao Cai, Xiao Cai, Alessandro Calcaterra, G. F. Cao, Ning Cao, Serkant Ali Çetin, Jinfan Chang, W. L. Chang, Gueorgui A. Chelkov, D. Y. Chen, G. Chen, Hesheng Chen, M. L. Chen, S. J. Chen, X. R. Chen, Yuanbo Chen, Z. J. Chen, W. S. Cheng, Gianluigi Cibinetto, Fabio Cossio, X. F. Cui, Hongliang Dai, Xinchen Dai, Alaa Dbeyssi, Remco E. de Boer, Dmitri V. Dedovich, Ziyan Deng, Achim Denig, Igor Denysenko, Marco Giovanni Maria Destefanis, Francesca De Mori, Yanchun Ding, C. Dong, J. Dong, Liaoyuan Dong, Mingyi Dong, X. Dong, Shuxian Du, Y. L. Fan, J. Fang, Shuangshi Fang, Y. Fang, Riccardo Farinelli, Luciano Fava, Florian Feldbauer, Giulietto Felici, C. Q. Feng, Junhua Feng, Miriam Fritsch, Chengdong Fu, Y. Gao, Y. Gao, Y. Gao, Y. G. Gao, Isabella Garzia, Panting Ge, Cong Geng, Evelina Gersabeck, Alexander Gilman, Klaus Götzen, L. Gong, Wenxuan Gong, Wolfgang Gradl, M. Greco, L. M. Gu, Minhao Gu, S. Gu, Y. T. Gu, C. Y. Guan, Aiqiang Guo, L. B. Guo, Rupan Guo, Yuping Guo, Alexey Guskov, T. T. Han, W. Y. Han, Xiqing Hao, Frederick Allan Harris, Nils Hüsken, K. L. He, Fritz-Herbert Heinsius, C. H. Heinz, T. Held, Yuekun Heng, Christoph Herold, Mathilde Himmelreich, Tobias Holtmann, G. Y. Hou, Y. R. Hou, Zhilong Hou, Haiming Hu, J. F. Hu, T. Hu, Y. Hu, G. S. Huang, L. Q. Huang, Xingtao Huang, Y. P. Huang, Z. Huang, Tahir Hussain, Walter Ikegami Andersson, William Imoehl, Muzaffar Irshad, S. Jaeger, S. Janchiv, Quan Ji, Qingping Ji, X. B. Ji, X. L. Ji, Y. Y. Ji, H. B. Jiang, Xiaoshan Jiang, J. B. Jiao, Zheng Jiao, Shan Jin, Y. Jin, Maoqiang Jing, 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. G. Kurth, Wolfgang Kühn, John Jake Lane, Jens Sören Lange, Paul Larin, Anita Lavania, Lia Lavezzi, Zuohong Lei, Hans Heinrich Leithoff, Max Lellmann, Thomas Lenz, C. Li, Chunhua Li, Cheng Li, D. M. Li, F. Li, G. Li, H. Li, H. Li, Haibo Li, Huijing Li, J. L. Li, J. Q. Li, J. S. Li, Ke Li, L. K. Li, Lei Li, Peirong Li, Shuaiying Li, Weidong Li, Weiguo Li, X. H. Li, Xing Long Li, Xiaoyu Li, Z. Y. Li, H. Liang, H. Liang, H. Liang, Y. F. Liang, Y. T. Liang, Guangrui Liao, L. Z. Liao, James Libby, C. X. Lin, B. J. Liu, C. X. Liu, D. Liu, Fu-Hu Liu, Fang Liu, Feng Liu, H. B. Liu, H. M. Liu, Huanhuan Liu, Huihui Liu, J. B. Liu, J. L. Liu, J. Y. Liu, K. Liu, K. Y. Liu, L. Liu, Meihong Liu, P. L. Liu, Q. Liu, Q. Liu, S. B. Liu, Shuai Liu, Tong Liu, Weimin Liu, X. Liu, Y. Liu, Y. B. Liu, Zhen-An Liu, Zhiqing Liu, Xinchou Lou, F. X. Lu, F. X. Lu, H. J. Lu, J. D. Lu, Junguang Lu, X. L. 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, Runqiu Ma, R. T. Ma, X. X. Ma, Xiaoyan 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, T. J. Min, Ryan Edward Mitchell, Xiaohu Mo, Y. J. Mo, Nikolai Yu. Muchnoi, Hajime Muramatsu, Simon Nakhoul, Yury Nefedov, Frank Nerling, Ivan Borisovich Nikolaev, Z. Ning, Shabana Nisar, Stephen L. Olsen, Qun Ouyang, Simone Pacetti, Xiang Pan, Y. Pan, A. Pathak, Piero Patteri, Marc Pelizäus, H. P. Peng, Klaus Peters, J. Pettersson, J. L. Ping, R. G. Ping, Ronald Poling, Vindhyawasini Prasad, H. Qi, Hongrong Qi, K. H. Qi, Ming Qi, Tianyu Qi, Tianyu Qi, S. Qian, W. B. Qian, Z. Qian, Congfeng Qiao, L. Q. Qin, Xiaoping Qin, X. S. Qin, Zhonghua Qin, Jinfa Qiu, S. Q. Qu, K. H. Rashid, Krishnakumar Ravindran, Christoph Florian Redmer, Angelo Rivetti, Viktor Rodin, Manuel Dionisio Da Rocha Rolo, Gang Rong, Christoph Rosner, Marcel Andre Rump, H. S. Sang, Andrei V. Sarantsev, Yasemin Schelhaas, Claudius Schnier, Karin Schönning, Marco Scodeggio, D. C. Shan, Wei Shan, Xinyu Shan, J. F. Shangguan, M. Shao, Chengping Shen, Hong-Fei Shen, P. X. Shen, X. Y. Shen, Huangchao Shi, Rongsheng Shi, X. Shi, Xiaodong Shi, J. J. Song, Weimin Song, Yunxuan Song, Stefano Sosio, Stefano Spataro, K. X. Su, P. P. Su, F. F. Sui, Gongxing Sun, H. K. Sun, J. F. Sun, Liang Sun, S. S. Sun, T. Sun, Wenyu Sun, Wenyu Sun, X. Sun, Y. J. Sun, Y. K. Sun, Y. Z. Sun, Z. T. Sun, Y. H. Tan, Yaxing Tan, C. J. Tang, G. Y. Tang, J. Tang, J. X. Teng, Viktor Thoren, W. H. Tian, Ismail Uman, B. Wang, Chengwei Wang, D. Y. Wang, H. J. Wang, H. P. Wang, K. Wang, Liangliang Wang, M. Wang, M. Z. Wang, Meng Wang, W. Wang, W. H. Wang, Weiping Wang, X. Wang, Xiongfei Wang, X. L. Wang, Y. Wang, Y. Wang, Y. D. Wang, Y. F. Wang, Y. Q. Wang, Y. Y. Wang, Z. Wang, Zongyuan Wang, Ziyi Wang, Zongyuan Wang, D. H. Wei, Peter Weidenkaff, Frederik Weidner, Shuopin Wen, D. J. White, Ulrich Wiedner, Guy Wilkinson, Magnus Wolke, Leonard Wollenberg, Jinfei Wu, Linghui Wu, Lianjin Wu, Xiao Wu, Z. Wu, Lei Xia, Hao Xiao, S. Y. Xiao, Zhenjun Xiao, X. H. Xie, Y. G. Xie, Y. H. Xie, T. Y. Xing, Guofa Xu, Q. J. Xu, Wei Xu, Xinping Xu, Yingchao Xu, F. Yan, Liang Yan, W. B. Yan, Wencheng Yan, Xu Yan, H. J. Yang, Hongxun Yang, L. Yang, S. L. Yang, Yongxu Yang, Yifan Yang, Zhi Yang, M. Ye, Minghan Ye, J. H. Yin, Z. Y. You, Boxiang Yu, Chunxu Yu, G. Yu, J. S. Yu, T. Yu, Chang-Zheng Yuan, L. Yuan, X. Q. Yuan, Ye Yuan, Z. Y. Yuan, C. X. Yue, Alperen Yüncü, A. A. Zafar, Zeng, Y. Zeng, A. Q. Zhang, B. X. Zhang, Guangyi Zhang, Haitao Zhang, H. H. Zhang, H. H. Zhang, Hongyu Zhang, J. J. Zhang, Jielei Zhang, Jingqing Zhang, Jiawei Zhang, Jianyong Zhang, J. Z. Zhang, Jianyu Zhang, Jiawei Zhang, Liqing Zhang, Lei Zhang, S. Zhang, Sifan Zhang, Shulei Zhang, X. D. Zhang, X. Y. Zhang, Y. Zhang, Y. H. Zhang, Yateng Zhang, Yan Zhang, Yao Zhang, Yi Zhang, Z. H. Zhang, Z. Y. Zhang, G. Zhao, J. Zhao, Jingyi Zhao, J. Z. Zhao, Lei Zhao, Ling Zhao, Ming-Gang Zhao, Q. Zhao, Shujun Zhao, Yubin Zhao, Y. X. Zhao, Zhengguo Zhao, Alexey Zhemchugov, Bo Zheng, Jianping Zheng, Y. Zheng, Y. H. Zheng, B. Zhong, C. Zhong, L. P. Zhou, Q. Zhou, X. Zhou, X. K. Zhou, X. R. Zhou, A. N. Zhu, Jianhui Zhu, K. Zhu, Kejun Zhu, S. H. Zhu, T. J. Zhu, W. J. Zhu, W. J. Zhu, Y. C. Zhu, Zian Zhu, B. S. Zou, Jiaheng Zou

• Using data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies from 4.178 to 4.600 GeV, we study the process eþe− → π0Xð3872Þγ and search for Zcð4020Þ0 → Xð3872Þγ. We find no significant signal and set upper limits on σðeþe− → π0Xð3872ÞγÞ · BðXð3872Þ → πþπ−J=ψÞ and σðeþe− → π0Zcð4020Þ0Þ · BðZcð4020Þ0 → Xð3872ÞγÞ · BðXð3872Þ → πþπ−J=ψÞ for each energy point at 90% confidence level, which is of the order of several tenths pb.