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Observation of ψ(3686)→η′e⁺e⁻

Medina Ablikim, M.N. Achasov, Samer Ahmed, Malte Albrecht, M. Alekseev, Antonio Amoroso, F.F. An, Q. An, J.Z. Bai, Y. Bai, Olga Bakina, Rinaldo Baldini Ferroli, Yong Ban, Khurelbaatar Begzsuren, D.W. Bennett, J.V. Bennett, Niklaus Berger, Monica Bertani, Diego Bettoni, 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, P.L. Chen, S.J. Chen, X.R. Chen, Yuanbo Chen, W. Cheng, X.K. Chu, Gianluigi Cibinetto, Fabio Cossio, 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. Fang, Shuangshi Fang, Y. Fang, Riccardo Farinelli, Luciano Fava, S. Fegan, Florian Feldbauer, Giulietto Felici, C.Q. Feng, Elisa Fioravanti, Miriam Fritsch, Chengdong Fu, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Gao, B. Garillon, I. Garzia, A. Gilman, Klaus Goetzen, L. Gong, Wenxuan Gong, Wolfgang Gradl, M. Greco, Minhao Gu, Y.T. Gu, Aiqiang Guo, R.P. Guo, Yuping Guo, Alexey Guskov, Z. Haddadi, S. Han, Xiqing Hao, F.A. Harris, K.L. He, X.Q. He, Fritz-Herbert Heinsius, T. Held, Yuekun Heng, Tobias Holtmann, Zhilong Hou, Haiming Hu, J.F. 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, M. Irshad, Quan Ji, Qingping Ji, X.B. Ji, X.L. Ji, Xiaoshan Jiang, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, Shan Jin, Y. Jin, Tord Johansson, A. Julin, Nasser Kalantar-Nayestanaki, X.S. Kang, Myroslav O. Kavatsyuk, B.C. Ke, T. Khan, Alfons Khoukaz, P. Kiese, R. Kiuchi, Ralf Kliemt, L. Koch, Onur Bugra Kolcu, Bertram Kopf, M. Kornicer, M. Kuemmel, Meike Küßner, Andrzej Kupsc, M. Kurth, Wolfgang Kühn, Jens Sören Lange, M. Lara, Paul Larin, Lia Lavezzi, H. Leithoff, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, Haibo Li, H.J. Li, J.C. Li, J.W. Li, Jin Li, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, Weidong Li, Weiguo Li, X.L. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, L.Z. Liao, J. Libby, C.X. Lin, D.X. 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.L. Liu, H.M. Liu, Huanhuan Liu, Huihui Liu, J.B. Liu, J.Y. Liu, K. Liu, K.Y. Liu, Ke Liu, L.D. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Zhen-An Liu, Zhiqing Liu, Y.F. Long, Xinchou Lou, H.J. Lu, Junguang Lu, Y. Lu, Yunpeng Lu, Chenglin Luo, M.X. Luo, X.L. Luo, S. Lusso, 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, Alessio Mangoni, Yajun Mao, Zepu Mao, Simonetta Marcello, Z.X. Meng, Johannes Gerhardus Messchendorp, Giulio Mezzadri, J. Min, Ryan Edward Mitchell, Xiaohu Mo, Y.J. Mo, C. Morales Morales, Nikolai Yu. Muchnoi, H. Muramatsu, A. Mustafa, 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, M. Papenbrock, P. Patteri, Marc Pelizäus, J. Pellegrino, H.P. Peng, Z.Y. Peng, Klaus Peters, J. Pettersson, J.L. Ping, R.G. Ping, A. Pitka, Ronald Poling, Vindhyawasini Prasad, H.R. Qi, Ming Qi, T. .Y. Qi, S. Qian, Congfeng Qiao, N. Qin, X.S. Qin, Zhonghua Qin, Jinfa Qiu, K.H. Rashid, Christoph Florian Redmer, M. Richter, M. Ripka, Angelo Rivetti, Manuel Dionisio Da Rocha Rolo, Gang Rong, Christoph Rosner, Andrei V. Sarantsev, M. Savrié, Claudius Schnier, Karin Schönning, Wei Shan, Xinyu Shan, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, X. Shi, J.J. Song, W.M. Song, X.Y. Song, Stefano Sosio, C. Sowa, Stefano Spataro, Gongxing Sun, J.F. Sun, L. 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, I. Tapan, M. Tiemens, B. Tsednee, Ismail Uman, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, Dan Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, Meng Wang, P. Wang, P.L. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.Y. Wang, Zongyuan Wang, T. Weber, D.H. Wei, P. Weidenkaff, Shuopin Wen, Ulrich Wiedner, Magnus Wolke, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, Y. Xia, D. Xiao, Y.J. Xiao, Zhenjun Xiao, Y.G. Xie, Y.H. Xie, X.A. Xiong, Q.L. Xiu, Guofa Xu, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, Xinping Xu, F. Yan, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, Hongxun Yang, L. Yang, Y.H. Yang, Yongxu Yang, Yifan Yang, Z.Q. Yang, M. Ye, Minghan Ye, J.H. Yin, Z.Y. You, Boxiang Yu, C.X. Yu, J.S. 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.L. Zhang, J.Q. Zhang, J.W. Zhang, Jianyong Zhang, J.Z. Zhang, K. Zhang, L. Zhang, T.J. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.T. Zhang, Yang Zhang, Yao 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, Shujun Zhao, T.C. Zhao, Yubin Zhao, Zhengguo Zhao, Alexey Zhemchugov, B. Zheng, Jianping Zheng, Y.H. Zheng, B. Zhong, L. Zhou, Q. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, Xiaoyu Zhou, Xu Zhou, A.N. Zhu, J. Zhu, J. Zhu, K. Zhu, Kejun Zhu, S. Zhu, S.H. 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 × 106 ψ(3686) events collected with the BESIII detector at the BEPCII collider, we report the first observation of the electromagnetic Dalitz decay ψ(3686) → η e+e−, with significances of 7.0σ and 6.3σ when reconstructing the η meson via its decay modes η → γπ+π− and η → π+π−η (η → γγ ), respectively. The weighted average branching fraction is determined to be B(ψ(3686) → η e+e−) = (1.90 ± 0.25 ± 0.11) × 10−6, where the first uncertainty is statistical and the second systematic.

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Author:Medina AblikimORCiD, M.N. Achasov, Samer AhmedGND, Malte AlbrechtORCiDGND, M. Alekseev, Antonio AmorosoORCiD, F.F. An, Q. An, J.Z. Bai, Y. Bai, Olga Bakina, Rinaldo Baldini Ferroli, Yong BanORCiD, Khurelbaatar Begzsuren, D.W. Bennett, J.V. Bennett, Niklaus BergerORCiDGND, Monica BertaniORCiD, Diego BettoniORCiD, Fabrizio BianchiORCiD, E. Boger, Igor R. BoykoORCiD, Roy A. BriereORCiD, H. Cai, X. Cai, O. Cakir, Alessandro CalcaterraORCiD, G.F. Cao, Serkant Ali ÇetinORCiD, J. Chai, Jinfan ChangORCiD, Gueorgui A. ChelkovORCiD, G. Chen, Hesheng ChenORCiD, J.C. Chen, M.L. Chen, P.L. Chen, S.J. Chen, X.R. Chen, Yuanbo ChenORCiD, W. Cheng, X.K. Chu, Gianluigi CibinettoORCiD, Fabio CossioORCiD, Hongliang DaiORCiD, J.P. Dai, Alaa DbeyssiORCiD, Dmitri V. Dedovich, Ziyan DengORCiD, Achim DenigORCiD, Igor Denysenko, Marco Giovanni Maria DestefanisORCiDGND, Francesca De MoriORCiD, Y. Ding, C. Dong, J. Dong, Liaoyuan DongORCiD, Mingyi DongORCiD, Z.L. Dou, Shuxian Du, P.F. Duan, J. Fang, Shuangshi FangORCiD, Y. Fang, Riccardo FarinelliORCiD, Luciano FavaORCiD, S. Fegan, Florian FeldbauerGND, Giulietto FeliciORCiD, C.Q. Feng, Elisa FioravantiORCiD, Miriam FritschORCiDGND, Chengdong FuORCiD, Q. Gao, X.L. Gao, Y. Gao, Y.G. Gao, Z. Gao, B. Garillon, I. Garzia, A. Gilman, Klaus GoetzenORCiDGND, L. Gong, Wenxuan GongORCiD, Wolfgang GradlORCiDGND, M. Greco, Minhao GuORCiD, Y.T. Gu, Aiqiang GuoORCiD, R.P. Guo, Yuping GuoORCiD, Alexey GuskovORCiD, Z. Haddadi, S. Han, Xiqing Hao, F.A. Harris, K.L. He, X.Q. He, Fritz-Herbert HeinsiusORCiDGND, T. Held, Yuekun HengORCiD, Tobias HoltmannGND, Zhilong HouORCiD, Haiming HuORCiD, J.F. Hu, T. Hu, Y. Hu, G.S. Huang, J.S. Huang, X.T. Huang, X.Z. Huang, Z.L. Huang, Tahir HussainORCiD, Walter Ikegami AnderssonORCiD, M. Irshad, Quan JiORCiD, Qingping JiORCiD, X.B. Ji, X.L. Ji, Xiaoshan JiangORCiD, X.Y. Jiang, J.B. Jiao, Z. Jiao, D.P. Jin, Shan JinORCiD, Y. Jin, Tord JohanssonORCiD, A. Julin, Nasser Kalantar-NayestanakiORCiD, X.S. Kang, Myroslav O. Kavatsyuk, B.C. Ke, T. Khan, Alfons KhoukazORCiDGND, P. Kiese, R. Kiuchi, Ralf KliemtORCiD, L. Koch, Onur Bugra KolcuORCiD, Bertram KopfGND, M. Kornicer, M. Kuemmel, Meike KüßnerORCiDGND, Andrzej KupscORCiD, M. Kurth, Wolfgang KühnORCiD, Jens Sören LangeORCiDGND, M. Lara, Paul LarinGND, Lia LavezziORCiD, H. Leithoff, C. Li, Cheng Li, D.M. Li, F. Li, F.Y. Li, G. Li, Haibo LiORCiD, H.J. Li, J.C. Li, J.W. Li, Jin Li, K.J. Li, Kang Li, Ke Li, Lei Li, P.L. Li, P.R. Li, Q.Y. Li, Weidong LiORCiD, Weiguo LiORCiD, X.L. Li, X.N. Li, X.Q. Li, Z.B. Li, H. Liang, Y.F. Liang, Y.T. Liang, G.R. Liao, L.Z. Liao, J. Libby, C.X. Lin, D.X. Lin, B. Liu, B.J. Liu, C.X. Liu, D. Liu, D.Y. Liu, Fu-Hu LiuORCiD, Fang Liu, Feng Liu, H.B. Liu, H.L. Liu, H.M. Liu, Huanhuan LiuORCiD, Huihui Liu, J.B. Liu, J.Y. Liu, K. Liu, K.Y. Liu, Ke Liu, L.D. Liu, Q. Liu, S.B. Liu, X. Liu, Y.B. Liu, Zhen-An LiuORCiDGND, Zhiqing Liu, Y.F. Long, Xinchou LouORCiD, H.J. Lu, Junguang LuORCiD, Y. Lu, Yunpeng LuORCiD, Chenglin LuoORCiD, M.X. Luo, X.L. Luo, S. Lusso, Xiao-Rui LyuORCiD, Fengcai Ma, H.L. Ma, Lianliang MaORCiD, M.M. Ma, Qiumei MaORCiD, T. Ma, X.N. Ma, Xiaoyan MaORCiD, Y.M. Ma, Frank E. MaasORCiDGND, Marco MaggioraORCiD, Q.A. Malik, Alessio MangoniORCiD, Yajun Mao, Zepu Mao, Simonetta MarcelloORCiD, Z.X. Meng, Johannes Gerhardus MesschendorpORCiDGND, Giulio MezzadriORCiD, J. Min, Ryan Edward Mitchell, Xiaohu MoORCiD, Y.J. Mo, C. Morales Morales, Nikolai Yu. MuchnoiORCiDGND, H. Muramatsu, A. Mustafa, Yury NefedovORCiD, Frank NerlingORCiD, Ivan Borisovich NikolaevORCiD, Z. Ning, Shabana Nisar, S.L. Niu, X.Y. Niu, Stephen L. OlsenORCiD, Qun OuyangORCiD, Simone PacettiORCiD, Y. Pan, M. Papenbrock, P. Patteri, Marc PelizäusGND, J. Pellegrino, H.P. Peng, Z.Y. Peng, Klaus PetersORCiDGND, J. Pettersson, J.L. Ping, R.G. Ping, A. Pitka, Ronald PolingORCiD, Vindhyawasini PrasadORCiD, H.R. Qi, Ming QiORCiD, T. .Y. Qi, S. Qian, Congfeng Qiao, N. Qin, X.S. Qin, Zhonghua QinORCiD, Jinfa QiuORCiD, K.H. Rashid, Christoph Florian RedmerORCiDGND, M. Richter, M. Ripka, Angelo RivettiORCiD, Manuel Dionisio Da Rocha RoloORCiD, Gang RongORCiD, Christoph RosnerORCiDGND, Andrei V. SarantsevGND, M. Savrié, Claudius SchnierGND, Karin SchönningORCiD, Wei ShanORCiD, Xinyu ShanORCiD, M. Shao, C.P. Shen, P.X. Shen, X.Y. Shen, H.Y. Sheng, X. Shi, J.J. Song, W.M. Song, X.Y. Song, Stefano SosioORCiD, C. Sowa, Stefano SpataroORCiD, Gongxing SunORCiD, J.F. Sun, L. 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, I. Tapan, M. Tiemens, B. Tsednee, Ismail UmanORCiDGND, G.S. Varner, B. Wang, B.L. Wang, D. Wang, D.Y. Wang, Dan Wang, K. Wang, L.L. Wang, L.S. Wang, M. Wang, Meng WangORCiD, P. Wang, P.L. Wang, W.P. Wang, X.F. Wang, Y. Wang, Y.F. Wang, Y.Q. Wang, Z. Wang, Z.G. Wang, Z.Y. Wang, Zongyuan WangORCiD, T. Weber, D.H. Wei, P. Weidenkaff, Shuopin WenORCiD, Ulrich WiednerORCiDGND, Magnus WolkeGND, L.H. Wu, L.J. Wu, Z. Wu, L. Xia, Y. Xia, D. Xiao, Y.J. Xiao, Zhenjun XiaoORCiD, Y.G. Xie, Y.H. Xie, X.A. Xiong, Q.L. Xiu, Guofa XuORCiD, J.J. Xu, L. Xu, Q.J. Xu, Q.N. Xu, Xinping XuORCiD, F. Yan, L. Yan, W.B. Yan, W.C. Yan, Y.H. Yan, H.J. Yang, Hongxun YangORCiD, L. Yang, Y.H. Yang, Yongxu Yang, Yifan YangORCiD, Z.Q. Yang, M. Ye, Minghan Ye, J.H. Yin, Z.Y. You, Boxiang YuORCiD, C.X. Yu, J.S. Yu, J.S. Yu, Chang-Zheng YuanORCiD, 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 ZhangORCiD, J. Zhang, J.L. Zhang, J.Q. Zhang, J.W. Zhang, Jianyong ZhangORCiD, J.Z. Zhang, K. Zhang, L. Zhang, T.J. Zhang, X.Y. Zhang, Y. Zhang, Y.H. Zhang, Y.T. Zhang, Yang Zhang, Yao Zhang, Yu Zhang, Z.H. Zhang, Z.P. Zhang, Z.Y. Zhang, G. Zhao, J.W. Zhao, J.Y. Zhao, J.Z. Zhao, Lei ZhaoORCiD, Ling Zhao, Ming-Gang ZhaoORCiD, Q. Zhao, Shujun Zhao, T.C. Zhao, Yubin ZhaoORCiD, Zhengguo ZhaoORCiD, Alexey ZhemchugovORCiD, B. Zheng, Jianping ZhengORCiD, Y.H. Zheng, B. Zhong, L. Zhou, Q. Zhou, X. Zhou, X.K. Zhou, X.R. Zhou, X.Y. Zhou, Xiaoyu Zhou, Xu Zhou, A.N. Zhu, J. Zhu, J. Zhu, K. Zhu, Kejun ZhuORCiD, S. Zhu, S.H. Zhu, X.L. Zhu, Y.C. Zhu, Y.S. Zhu, Zian ZhuORCiD, J. Zhuang, B.S. Zou, Jiaheng ZouORCiD
URN:urn:nbn:de:hebis:30:3-845292
DOI:https://doi.org/10.1016/j.physletb.2018.05.038
ISSN:0370-2693
ArXiv Id:http://arxiv.org/abs/1803.09714
Parent Title (English):Physics Letters B
Publisher:Elsevier
Place of publication:Amsterdam
Document Type:Article
Language:English
Date of Publication (online):2018/08/16
Date of first Publication:2018/05/17
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Creating Corporation:BESIII Collaboration
Release Date:2024/06/21
Tag:Annihilation; BESIII; Charmonium; Dalitz decay
Volume:783.2018
Page Number:7
First Page:452
Last Page:458
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - CC BY - Namensnennung 4.0 International