Open Access

Medina Ablikim, Mikhail N. Achasov, X.C. Ai, O. Albayrak, Malte Albrecht, D.J. Ambrose, Antonio Amoroso, Fenfen An, Qi An, Jingzhi Bai, Rinaldo Baldini Ferroli, Yong Ban, D.W. Bennett, Jake V. Bennett, Monica Bertani, Diego Bettoni, J.M. Bian, Fabrizio Bianchi, E. Boger, Igor R. Boyko, Roy A. Briere, H. Cai, Xiao Cai, O. Cakir, Alessandro Calcaterra, G.F. Cao, Serkant Ali Çetin, Jinfan Chang, Gueorgui A. Chelkov, G. Chen, Hesheng Chen, H.Y. Chen, J.C. Chen, M.L. Chen, S.J. Chen, X. Chen, X.R. Chen, Yuanbo Chen, H.P. Cheng, 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, Shuxian Du, P.F. Duan, E.E. Eren, J.Z. Fan, J. Fang, Shuangshi Fang, X. Fang, Y. Fang, Luciano Fava, Florian Feldbauer, Giulietto Felici, C.Q. Feng, Elisa Fioravanti, Miriam Fritsch, Chengdong Fu, Q. Gao, X.Y. Gao, Y. Gao, Z. Gao, I. Garzia, Klaus Goetzen, Wenxuan Gong, Wolfgang Gradl, M. Greco, Minhao Gu, Y.T. Gu, Y.H. Guan, Aiqiang Guo, L.B. Guo, Y. Guo, Yuping Guo, Z. Haddadi, A. Hafner, S. Han, Xiqing Hao, F.A. Harris, K.L. He, X.Q. He, T. Held, Yuekun Heng, Zhilong Hou, C. Hu, Haiming Hu, J.F. Hu, T. Hu, Y. Hu, G.M. Huang, G.S. Huang, J.S. Huang, X.T. Huang, Y. Huang, Tahir Hussain, 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, Bai-Cian Ke, P. Kiese, Ralf Kliemt, B. Kloss, Onur Bugra Kolcu, Bertram Kopf, M. Kornicer, Wolfgang Kühn, Andrzej Kupsc, Jens Sören Lange, M. Lara, Paul Larin, C. Leng, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, Haibo Li, J.C. Li, Jin Li, K. Li, K. Li, Lei Li, P.R. Li, T. Li, Weidong Li, Weiguo Li, X.L. Li, X.M. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, D.X. Lin, B.J. Liu, C.X. 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, Zhen-An Liu, Zhiqing Liu, H. Loehner, Xinchou Lou, H.J. Lu, Junguang Lu, Y. Lu, Yunpeng Lu, Chenglin Luo, M.X. Luo, Tao Luo, X.L. Luo, Xiao-Rui Lyu, Fengcai Ma, Hailong Ma, Lianliang Ma, Qiumei Ma, T. Ma, X.N. Ma, Xiaoyan Ma, Frank E. Maas, Marco Maggiora, Yajun Mao, Zepu Mao, Simonetta Marcello, Johannes Gerhardus Messchendorp, J. Min, Ryan Edward Mitchell, Xiaohu Mo, Y.J. Mo, C. Morales Morales, K. Moriya, Nikolai Yu. Muchnoi, H. Muramatsu, Yury Nefedov, Frank Nerling, Ivan Borisovich Nikolaev, Z. Ning, Shabana Nisar, S.L. Niu, X.Y. Niu, Stephen L. Olsen, Qun Ouyang, Simone Pacetti, P. Patteri, Marc Pelizäus, H.P. Peng, Klaus Peters, J. Pettersson, J.L. Ping, R.G. Ping, Ronald Poling, Vindhyawasini Prasad, 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, V. Santoro, Andrei V. Sarantsev, M. Savrié, Karin Schönning, S. Schumann, Wei Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, W.M. Song, M.R. Shepherd, X.Y. Song, Stefano Sosio, Stefano Spataro, Gongxing Sun, J.F. Sun, S.S. 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, M. Ullrich, Ismail Uman, G.S. Varner, B. Wang, D. Wang, D.Y. Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, P. Wang, P.L. Wang, S.G. Wang, W. Wang, X.F. Wang, Y.D. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.H. Wang, Z.Y. Wang, T. Weber, D.H. Wei, J.B. Wei, P. Weidenkaff, Shuopin Wen, Ulrich Wiedner, Magnus Wolke, Linghui Wu, Z. Wu, L.G. Xia, Y. Xia, D. Xiao, H. Xiao, Zhenjun Xiao, Y.G. Xie, Q.L. Xiu, Guofa Xu, L. Xu, Q.J. Xu, Xinping Xu, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, Hongxun Yang, L. Yang, Y. Yang, Yongxu Yang, M. Ye, Minghan Ye, J.H. Yin, Boxiang Yu, C.X. Yu, J.S. Yu, Chang-Zheng Yuan, W.L. Yuan, Y. Yuan, A. Yuncu, A.A. Zafar, A. Zallo, Y. Zeng, B.X. Zhang, B.Y. Zhang, C. Zhang, C.C. Zhang, D.H. Zhang, H.H. Zhang, Hongyu Zhang, J.J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, Jianyong Zhang, J.Z. Zhang, K. Zhang, L. Zhang, X.Y. Zhang, Y. Zhang, Y.N. Zhang, Y.H. 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, Bo 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 extract the e+e− →π+π− cross section in the energy range between 600 and 900 MeV, exploiting the method of initial state radiation. A data set with an integrated luminosity of 2.93 fb−1 taken at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider is used. The cross section is measured with a systematic uncertainty of 0.9%. We extract the pion form factor |Fπ|2 as well as the contribution of the measured cross section to the leading-order hadronic vacuum polarization contribution to (g−2)μ. We find this value to be aππ,LO μ (600–900 MeV) = (368.2 ±2.5stat±3.3sys) ·10−10, which is between the corresponding values using the BaBar or KLOE data.