A ug 2 01 6 Measurement of the leptonic decay width of J / ψ using initial state radiation
Medina Ablikim,Mikhail N Achasov,Xiang Ai, Onder Albayrak,Manfred Albrecht, D. J. Ambrose,Antonio Amoroso, F. F. An,Qi An,Jingzhi Bai,Rinaldo Baldini Ferroli, Y. Ban, Dean William Bennett, J. V. Bennett, M. Bertani,Daniela Bettoni,Jianming Bian,Fabrizio Bianchi, E. Boger, I. R. Boyko,Roy A. Briere,Hongrui Cai,Xinlun Cai,Orhan Çakır, Andrew Calcaterra,Guofu Cao,Serkant Ali Çetin,Jinfan Chang,Georgy Chelkov,Guo-ming Chen,H. S. Chen,H. Y. Chen,Jiangchuan Chen,Mary M Chen,Sheng Jian Chen,Xuzong Chen,Yuanbo Chen, H. P. Cheng,Xinkun Chu, Gianluigi Cibinetto,Hongliang Dai,Jianping Dai, Alaa Dbeyssi,D. V. Dedovich,Ziyan Deng, A. G. Denig, I. Denysenko, Marco Destefanis, Francesca De Mori,Ying Ding,Chao Dong,Jing Dong,Liaoyuan Dong, Mia Yuan Dong,Shu-xian Du, P. F. Duan,Engin Eren,Jin Fan,Jian Fang, S. S. Fang,Xin Fang, Yi Fang,Ludovic Fava, Florian Feldbauer,Giulietto Felici,Changqing Feng, E. Fioravanti, Matthias J. Fritsch,Chengdong Fu, Q. Gao,Xin-lei Gao,Y. G. Gao,Zhen Gao, I. Garzia,Chuanzhi Geng, Klaus Goetzen, W. X. Gong, Walter Gradl, M. Greco,Minhao Gu,Yun-ting Gu,Yong Hua Guan,Aiqiang Guo,L . B. Guo, Y. P. Guo, Zahra Haddadi,Annina M. Hafner,Shuang Han,Y. L. Han,Xiqing Hao,Frederick A Harris,Kanglin He,Z. Y. He,Th. Held,Yuekun Heng, Z. L. Hou, C. Hu,Huai Hu,Jieming Hu, Tao Hu, Y. Hu,Guangshun Huang, H. P. Huang, J. S. Huang,Xi Huang,Yongfeng Huang,Talib Hussain, Q. P. Ji,Xiangdong Ji,X. L. Ji,Lin Lin Jiang,L. W. Jiang,Xingyu Jiang,Xiu Jiang, J. B. Jiao, Z. Jiao, D. P. Jin,Shengkan Jin,Tord Johansson,Andy Julin, Nasser Kalantar-Nayestanaki,Xiang Kang,Xiaoshen Kang,Myroslav Kavatsyuk, B. C. Ke, Patric Kiese, Ralf Kliemt,Benedikt Kloss, Onur Buğra Kolcu, Bertram Kopf,Mihajlo Kornicer,W. Kuehn, A. Kupść, J. S. Lange,Manuel Lara, P. A. Larin, Chongyang Leng, Cheng Hai Li,Danyang Li,Fengyun Li,Guihua Li,Huaixing Li,Jin Chun Li, K. J. Li, Lukas Kencl Li,Peter Li, Tong Li, Wenhui Li,Wei Gang Li,Xingguo Li, Xin Min Li, Xin Li,Xi Li,Zhibing Li,H. Liang,Y. F. Liang,Y. T. Liang,Gaoyu Liao, D. X. Lin,Bingxuan Liu, C. X. Liu, Fang Liu, Feng Liu, Huihui Liu,Hongbang Liu, Huanhuan Liu,J. Y. Liu,Li-Yu Daisy Liu,Qing-qing Liu,Shubin Liu, Xin Liu,Yubin Liu,Zhiqing Liu,Zhiqiang Liu,Zhiqing Liu, Herbert Löhner, X. C. Lou,Hung Jung Lu,Junguang Lu, Ren Qiang Lu, Y. P. Lu,Chang-qing Luo,M. X. Luo, Tao Luo,Xuelan Luo, M. Lv,Xiangxue Lyu, F Roxbury Crossing Ma,Hanwu Ma, Li Li Ma, Q. M. Ma,Tianshu Ma, Xiang Nan Ma, Xiang Ma,Frank E. Maas,Marco Maggiora,Yuping Mao, Z. P. Mao, Sandra Marcello, Johan Messchendorp, Jun-Ki Min, T. J. Min, R. E. Mitchell, X. H. Mo, Yujin Mo,C. Morales Morales,Morales, Katsutoshi Moriya, N. Y.-U. Muchnoi,Hiroyuki Muramatsu,Yu. Nefedov, Frank Nerling, I. B. Nikolaev,Zhi Ning, S. Nisar,Shunli Niu,Xiao Niu,Stephen L Olsen,Qi Ouyang,S. P. Pacetti, Piero Patteri, M. Pelizaeus,Haiping Peng, Klaus Peters, Jean Pettersson, J. L. Ping,Ronggang G. Ping, Ronald Poling,Vindhyawasini Prasad, Y. N. Pu,Minghui Qi,Su Qian, C. F. Qiao, L. Q. Qin,Nian Qin,Xian Qin,Yanyan Qin, Z. H. Qin,Jinfa Qiu, Khalid Hamid Rashid, Christoph Florian Redmer,Hong Liang Ren, Martin Ripka,G . Rong,Ch. Rosner,Xiangdong D. Ruan,Valentina Santoro,Andrey Sarantsev, Mauro Savrié, Karin Schoenning,S. G. Schumann,Wen-Yu Shan,Ming'an Shao,Chengping Shen, Peng Xiang Shen,Xiaoyan Shen, H. Y. Sheng,Wei Min Song,Xieyan Song, Stefano Sosio, S. Spataro, G . X. Sun,Junfeng Sun,Shengsen Sun,Y. J. Sun,Yong-Jie Sun,Zhi Jia Sun,Zhi-jun Sun, Cheong Tang,Xiao Tang,I. Tapan, Edward H. Thorndike,Marcel Tiemens,Mario Ullrich, Ismail Uman,Gary S. Varner,Bao Wang,Dan Y. Wang, K. Wang,Lili Wang,Liangliang Wang,M. -S. Wang,Peiliang Wang,S. G. Wang, Wei-ping Wang,Xiaoli Wang,Y. D. Wang,Y. F. Wang,Y. Q. Wang, Zongyuan Wang,Tobias Weber,Daihui H. Wei,Jingan Wei,P. C. Weidenkaff,Shyang Wen,Ulrich Wiedner, Magnus Wolke,Li Hua Wu,Ziyu Wu,Ligang Xia, Yu Xia,Dong Xiao,Hao Xiao,Zhenjun Xiao,Yuehong Xie,Quanfa Xiu,Guofa Xu,Lanshuan Xu,Qingnian Xu,Q. N. Xu,Xinping Xu, Lin Yan,W. B. Yan,W. C. Yan, Y. H. Yan, Heui Jean Yang, Huan Yang,Liu Yang, Y. X. Yang,H. Ye,Minghua Ye,Junhao Yin,Bing Yu, C. X. Yu,Hong Wei Yu,Jinfeng Yu,Changzheng Yuan,W. L. Yuan,Ye Zhen Yuan, Alperen Yuncu, A. A. Zafar,A. Zallo,Yi Zeng, B. X. Zhang, Bao Zhang,Chaojin Zhang,Dahua Zhang,H. H. Zhang,Hong-hao Zhang,Juping Zhang,Jiawei Zhang,Jia-ju Zhang,Jing Zhang,J. Y. Zhang,Jianyu Zhang,Keke Zhang
semanticscholar（2018）
引用 0|浏览14
摘要
Using a data set of 2.93 fb taken at a center-of-mass energy of √ s = 3.773 GeV with the BESIII detector at the BEPCII collider, we measure the process ee → J/ψγ → μμγ and determine the product of the branching fraction and the electronic width Bμμ · Γee = (333.4± 2.5stat ± 4.4sys) eV. Using the earlierpublished BESIII result for Bμμ = (5.973 ± 0.007stat ± 0.037sys)%, we derive the J/ψ electronic width Γee = (5.58 ± 0.05stat ± 0.08sys) keV.
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