Measurements of Σ+ and Σ− time-like electromagnetic form factors for center-of-mass energies from 2.3864 to 3.0200 GeV

M. Ablikim,M.N. Achasov,P. Adlarson,Samer Ali Nasher Ahmed,M. Albrecht,Antonio Amoroso,Q. An,Anita,Y Bai,O. Bakina,R. Baldini Ferroli,I. Balossino,Y. Ban,K. Begzsuren,J. V. Bennett,Niklaus Berger,M. Bertani,D. Bettoni,F. Bianchi,Jacek Biernat,J. Bloms,A. Bortone,I Boyko,R. A. Briere,H Cai,XZ(蔡翔舟) Cai,A. Calcaterra,G. F. Cao,N Cao,S. A. Cetin,J. F. Chang,W-L Chang,G Chelkov,D.Y. Chen,Gang Chen,H. S. Chen,M. L. Chen,S. J. Chen,X.R. Chen,Y. B. Chen,W. S. Cheng,G. Cibinetto,F. Cossio,X.F. Cui,H. L. Dai,J. P. Dai,Xingchao Dai,A. Dbeyssi,R. B. de Boer,D. Dedovich,Z.Y. Deng,A. G. Denig,I. Denysenko,M. Destefanis,F. De Mori,Y. Ding,C. Dong,J. Dong,L. Y. Dong,M. Y. Dong,S. X. Du,J. Fang,S. S. Fang,Yi Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C.-Q. Feng,M. Fritsch,C.D. Fu,Y. Fu,X. L. Gao,Y. Gao,Y.G. Gao,I. Garzia,Evelina Gersabeck,A. Gilman,K. Goetzen,L. Gong,W. X. Gong,W. Gradl,M. Greco,L. M. Gu,M. H. Gu,S. Gu,Y. T. Gu,C.Y.Guan,A. Q. Guo,Libo Guo,R.P. Guo,Y. P. Guo,A. Guskov,S. W. Han,T. T. Han,T. Z. Han,X. Q. Hao,F. A. Harris,K. L. He,F. H. Heinsius,T. Held,Y. K. Heng,M. Himmelreich,T. Holtmann,Y.R. Hou,Z.L. Hou,H. M. Hu,J. F. Hu,T. Hu,Y. Hu,G. S. Huang,L. Q. Huang,X. T. Huang,Z. Huang,N. Huesken,T. Hussain,W. Ikegami Andersson,W. Imoehl,M. Irshad,S. Jaeger,S. Janchiv,Q. Ji,Q. P. Ji,X. B. Ji,X. L. Ji,H. B. Jiang,X. S. Jiang,X.Y. Jiang,J. B. Jiao,Z. Jiao,S. Jin,Y. Jin,Tord Johansson,Nasser Kalantar-Nayestanaki,X.S. Kang,R. Kappert,M. Kavatsyuk,Bibo Ke,I. K. Keshk,A. Khoukaz,P. Kiese,R. Kiuchi,R. Kliemt,L. Koch,O. B. Kolcu,B. Kopf,M. Kuemmel,M. Kuessner,Andrzej Kupsc,M. G. Kurth,W. Kuhn,John Jake Lane,Jens Soeren Lange,P. Larin,L. Lavezzi,H. Leithoff,M. Lellmann,T. Lenz,C. Li,C. H. Li,Cheng Li,D. M. Li,F. Li,G. Li,H. B. Li,H. J. Li,Jing Li,J. Q. Li,K. J. Li,L.K. Li,Lei Li,P. L. Li,P. R. Li,Shiqun Li,W. D. Li,W.G. Li,X H Li,X. L. Li,Z. B. Li,Z.Y. Li,H. Liang,Y. F. Liang,Y.T. Liang,L. Z. Liao,J. Libby,C. X. Lin,Bingxuan Liu,B.J. Liu,C.X. Liu,D Liu,D.Y. Liu,F.-H. Liu,F.-H. Liu,Feng Liu,H. B. Liu,H. M. Liu,Huanhuan Liu,H. L Liu,J. B. Liu,J. Y. Liu,K. Liu,K. Y. Liu,Ke Liu,L. D. Liu,Q. Liu,S. B. Liu,Shuai Liu,T. Liu,X. Liu,Y. B. Liu,Z. A. Liu,Z. Q. Liu,Y. F. Long,Xuanhong Lou,F. X. Lu,H. J. Lu,J. D. Lu,J. G. Lu,X. L. Lu,Y. Lu,Y. P. Lu,C. L. Luo,M. X. Luo,P. W. Luo,T. Luo,X. L. Luo,S. Lusso,Xiao-Rui Lyu,F. C. Ma,H.L. Ma,Lianliang Ma,Minglin Ma,Q.M. Ma,R. Q. Ma,R. T. Ma,X. N. Ma,Xiaoyan Ma,X. Y. Ma,Y. M. Ma,F. E. Maas,M. Maggiora,S. Maldaner,S. Malde,Q. A. Malik,A. Mangoni,Y. J. Mao,Z.P. Mao,S. Marcello,Z. X. Meng,J. G. Messchendorp,G. Mezzadri,T. J. Min,R. E. Mitchell,X. H. Mo,Y. J. Mo,N. Yu. Muchnoi,H. Muramatsu,S. Nakhoul,Y. Nefedov,F. Nerling,I. B. Nikolaev,Z. Ning,S. Nisar,S.L. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Yue Pan,A. Pathak,P. Patteri,M. Pelizaeus,Haiping Peng,K. Peters,Joachim Pettersson,Jialun Ping,R. G. Ping,A. Pitka,R. Poling,V. Prasad,H. R. Qi,H. R. Qi,M. Qi,T. Y. Qi,S. Qian,W.-B. Qian,Z. Qian,Cong-Feng Qiao,L. Q. Qin,X.P. Qin,X. S. Qin,Z. H. Qin,J.F. Qiu,S. Q. Qu,K. H. Rashid,K. Ravindran,C. F. Redmer,A. Rivetti,V. Rodin,Manuel Rolo,G. Rong,Ch. Rosner,M. Rump,A. Sarantsev,M. Savrie,Y. Schelhaas,C. Schnier,K. Schoenning,D. C. Shan,W. Shan,Xu Shan,M. Shao,C. P. Shen,P. X. Shen,X. Y. Shen,H C Shi,R. S. Shi,X. Shi,X D Shi,J. J. Song,Q.Q. Song,W. M. Song,Y. X. Song,S. Sosio,S. Spataro,F. F. Sui,G.X. Sun,J. F. Sun,L. Sun,S. S. Sun,T. R. Sun,W. Y. Sun,Y. J. Sun,Y. K. Sun,Y.Z. Sun,Z.T. Sun,Y. H. Tan,Y. X. Tan,C. J. Tang,G. Y. Tang,J. Tang,Viktor Thorén,B. T. Tsednee,I. Uman,B. Wang,B. L. Wang,C. W. Wang,D. Y. Wang,H. P. Wang,K Wang,L.L. Wang,Meng Wang,M. Wang,Meng Wang,W. H. Wang,W. P. Wang,Xiaogang Wang,X. F. Wang,X. L. Wang,Y. F. Wang,Y. D. Wang,Y. F. Wang,Y.Q. Wang,Z. H. Wang,Z.Y. Wang,Ziyi Wang,Zongyuan Wang,T. Weber,D. H. Wei,P. Weidenkaff,F. Weidner,S.P. Wen,Dylan Jaide White,U. Wiedner,G. Wilkinson,Magnus Wolke,L. Wollenberg,Jian-Pin Wu,L.H. Wu,L. J. Wu,X. Wu,Z. Wu,L. G. Xia,H. Xiao,S. Y. Xiao,Y.J. Xiao,Zhenjun Xiao,X. H. Xie,Y.G. Xie,Y. H. Xie,T. Y. Xing,X. A. Xiong,G. F. Xu,J.J. Xu,Q. J. Xu,W Xu,X. P. Xu,L. Yan,W. B. Yan,W.C. Yan,Xu Yan,Haijun Yang,Haijun Yang,L. Yang,R. X. Yang,S. L. Yang,Y. H. Yang,Y. X. Yang,Yifan Yang,Zhi Yang,M. H. Ye,M. H. Ye,J.H. Yin,Zhengyun You,B. X. Yu,C. X. Yu,Guoqiang Yu,J.S. Yu,T. Yu,C. Z. Yuan,W. L. Yuan,X.Q. Yuan,Y. Yuan,Z. Y. Yuan,C. X. Yue,A. Yuncu,A. A. Zafar,Y. Zeng,B.X. Zhang,Guangyi Zhang,H. H. Zhang,H.Y. Zhang,J.L. Zhang,J. Q. Zhang,J. W. Zhang,J.Y. Zhang,J. Z. Zhang,Jianyu Zhang,JiaWei Zhang,L. Zhang,Lei Zhang,S. Zhang,S. F. Zhang,T. J. Zhang,X.Y. Zhang,Y. Zhang,Y. H. Zhang,Y. T. Zhang,Yan Zhang,Yao Zhang,Yi Zhang,Zuman Zhang,Z. Y. Zhang,G. Zhao,J. Zhao,J. Y. Zhao,J. Z. Zhao,Lei Zhao,Ling Zhao,M. G. Zhao,Q. Z. Zhao,S. J. Zhao,Y.B. Zhao,Y. X. Zhao Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,Jianping Zheng,Yi Zheng,Y. H. Zheng,B. Zhong,C. Zhong,L. Zhou,Q. Zhou,X.Y. Zhou,X K Zhou,X. R. Zhou,A. N. Zhu,J. Zhu,K. Zhu,K. J. Zhu,S.H. Zhu,W. J. Zhu,Xiaofeng Zhu,Y.C. Zhu,Z. A. Zhu,B.S. Zou,J.H. Zou

Measurements of Σ+ and Σ− time-like electromagnetic form factors for center-of-mass energies from 2.3864 to 3.0200 GeV

2021

Abstract The Born cross sections of the e + e − → Σ + Σ ¯ − and e + e − → Σ − Σ ¯ + processes are determined for center-of-mass energy from 2.3864 to 3.0200 GeV with the BESIII detector. The cross section lineshapes can be described properly by a pQCD function and the resulting ratio of effective form factors for the Σ + and Σ − is consistent with 3. In addition, ratios of the Σ + electric and magnetic form factors, | G E / G M | , are obtained at three center-of-mass energies through an analysis of the angular distributions. These measurements, which are studied for the first time in the off-resonance region, provide precision experimental input for understanding baryonic structure. The observed new features of the Σ ± form factors require more theoretical discussions for the hyperons.

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