M. Ablikim,М. Н. Ачасов,S. Ahmed,M. Albrecht,M. Alekseev,A. Amoroso,F. F. An,Q. An,Y. Bai,O. Bakina,R. Baldini Ferroli,Y. Ban,K. Begzsuren,J. V. Bennett,N. Berger,M. Bertani,D. Bettoni,F. Bianchi,J. Bloms,I. R. Boyko,R. A. Briere,H. Cai,X. Cai,A. Calcaterra,G. F. Cao,N. Cao,S. A. Çetin,J. Chai,J. F. Chang,W. L. Chang,G. A. Chelkov,D Y Chen,G Chen,H S Chen,J C Chen,M L Chen,S J Chen,Y B Chen,W. S. Cheng,G. Cibinetto,F. Cossio,X. F. Cui,H. L. Dai,J. P. Dai,X. C. Dai,A. Dbeyssi,D. Dedovich,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,Y. Ding,C. Dong,J. Dong,Dong Liu,M. Y. Dong,Z. L. Dou,S. X. Du,J. Fan,J. Fang,S. S. Fang,Y. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Q. Feng,M. Fritsch,C. D. Fu,Y. Fu,Q. Gao,X. L. Gao,Y. Gao,Y. Gao,Z. Gao,B. Garillon,I. Garzia,A. Gilman,K. Goetzen,L. Gong,W. X. Gong,W. Gradl,M. Greco,L. M. Gu,M. H. Gu,S. Gu,Y. T. Gu,A. Q. Guo,L. B. Guo,R. P. Guo,Y. P. Guo,A. Guskov,S. Han,X. Q. Hao,F. A. Harris,K. L. He,F. H. Heinsius,T. Held,Y. K. Heng,Y. R. Hou,Z. L. Hou,H. M. Hu,J. F. Hu,T. Hu,Y. Hu,G. S. Huang,J. S. Huang,X. T. Huang,Xiaozhong Huang,N. Huesken,T. Hussain,W. Ikegami Andersson,W. Imoehl,M. Irshad,Q. Ji,Q. Ji,X. B. Ji,X. L. Ji,H. L. Jiang,X. S. Jiang,X. Y. Jiang,J. B. Jiao,Z. Jiao,D. P. Jin,S. Jin,Y. Jin,T. Johansson,N. Kalantar‐Nayestanaki,X. S. Kang,R. Kappert,M. Kavatsyuk,B. C. Ke,I. K. Keshk,Tabassum Khan,A. Khoukaz,P. Kiese,R. Kiuchi,R. Kliemt,L. Koch,O. B. Kolcu,B. Kopf,M. Kuemmel,M. Kuessner,A. Kupść,M. G. Kurth,M. G. Kurth,W. Kühn,J. S. Lange,P. Larin,L. Lavezzi,H. Leithoff,T. Lenz,C Li,Cheng Li,D M Li,F Li,F Y Li,G Li,H B Li,H J Li,J C Li,J W Li,Ké Li,L K Li,Lei Li,P L Li,P R Li,Q Y Li,W D Li,W G Li,X H 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,Y. J. Lin,B Liu,B J Liu,C X Liu,D Liu,D Y Liu,F H Liu,Fang Liu,Feng Liu,H B Liu,H M Liu,Huanhuan Liu,Huihui Liu,J B Liu,J Y Liu,K Y Liu,Ke Liu,Q Liu,S B Liu,T Liu,X Liu,X Y Liu,Y B Liu,Z A Liu,Zhiqing Liu,Y. F. Long,X. Lou,H. Lu,J. D. Lu,J. G. Lu,Y. P. Lu,Y. P. Lu,C. L. Luo,M. X. Luo,P. W. Luo,T. Luo,X. L. Luo,S. Lusso,X. R. Lyu,F C,H L,L L,M M,Q M,X N,X X,X Y,Y M,F. E. Maas,M. Maggiora,S. Maldaner,Q. A. Malik,A. Mangoni,Y. Mao,Z. P. Mao,S. Marcello,Z. Meng,J. G. Messchendorp,G. Mezzadri,J. Min,T. J. Min,R. E. Mitchell,X. H. Mo,Y. J. Mo,C. Morales Morales,N. Yu. Muchnoi,H. Muramatsu,A. Mustafa,S. Nakhoul,Y. Nefedov,F. Nerling,I. B. Nikolaev,Z. Ning,S. Nisar,S. L. Niu,S. L. Olsen,Q. Ouyang,S. Pacetti,Y. Pan,M. Papenbrock,P. Patterí,M. Pelizaeus,H. Peng,K. Peters,J. Pettersson,J. L. Ping,R. G. Ping,A. Pitka,R. Poling,V. Prasad,M. Qi,T. Y. Qi,S. J. Qian,C. F. Qiao,N. Qin,X. P. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,S. Q. Qu,K. H. Rashid,C. F. Redmer,Markus Richter,M. Ripka,A. Rivetti,M. Rolo,G. Rong,Ch. Rosner,M. Rump,A. Sarantsev,M. Savrié,K. Schoenning,W. Shan,X. Y. Shan,M. Shao,C. P. Shen,P. X. Shen,X. Y. Shen,H. Y. Sheng,X. Shi,X. Shi,J. J. Song,Q. Q. Song,X. Y. Song,S. Sosio,C. Sowa,S. Spataro,F. F. Sui,G. X. Sun,J. F. Sun,L. Sun,S. S. Sun,X. Sun,Y. J. Sun,Y. Z. Sun,Z. J. Sun,Z. T. Sun,Y. T. Tan,C. J. Tang,G. Y. Tang,X. Tang,V. Thoren,B. Tsednee,I. Uman,B Wang,B L Wang,C W Wang,D Y Wang,H H Wang,K Wang,L L Wang,L S Wang,M Wang,M Z Wang,Meng Wang,P Wang,P L Wang,R M Wang,W P Wang,X Wang,X F Wang,Y Wang,Y F Wang,Z Wang,Z G Wang,Z Y Wang,Zongyuan Wang,T. Weber,D. H. Wei,P. Weidenkaff,Hao Wen,S. P. Wen,U. Wiedner,M. Wolke,L. H. Wu,L. J. Wu,Zhi Wang,L. Xia,Y. Xia,S. Y. Xiao,Y. J. Xiao,Z. J. Xiao,Y. Xie,Y. Xie,T. Y. Xing,X. A. Xiong,Q. L. Xiu,G. F. Xu,Jun Xu,Lei Xu,Q. J. Xu,W. Xu,X. P. Xu,F. Yan,L. Yan,W. B. Yan,W. C. Yan,Y. H. Yan,H. J. Yang,H. X. Yang,L. Yang,R. X. Yang,S. L. Yang,Yifan Yang,Y. Yang,Yifan Yang,Zishuo Yang,M Ye,M H Ye,J. H. Yin,You Zhou,B. X. Yu,C. X. Yu,J. S. Yu,C. Z. Yuan,X. Q. Yuan,Y. Yuan,A. Yuncu,A. A. Zafar,Y. Zeng,B X Zhang,B Y Zhang,C C Zhang,D H Zhang,H H Zhang,H Y Zhang,J Zhang,J L Zhang,J Q Zhang,J Y Zhang,K Zhang,L Zhang,S F Zhang,T J Zhang,X Y Zhang,Y Zhang,Y H Zhang,Yang Zhang,Yao Zhang,Yu Zhang,Z H Zhang,Z P Zhang,Z Y Zhang,G. Zhao,J. W. Zhao,J. Zhao,J. Zhao,Zhao Liu,Ling Zhao,M. G. Zhao,Q. Zhao,S. J. Zhao,T. C. Zhao,Y. B. Zhao,Z. Zhao,A. Zhemchugov,B. Zheng,J. P. Zheng,Y. Zheng,Y. Zheng,B. Zhong,Zhou Li,Zhou Li,Q. Zhou,Xiang Zhou,X. K. Zhou,X. R. Zhou,X. K. Zhou,X. K. Zhou,A. N. Zhu,Jing Zhu,K. J. Zhu,K. J. Zhu,S. H. Zhu,W. J. Zhu,X. Zhu,Y. Zhu,Y. S. Zhu,Z. A. Zhu,J. Zhuang,B. S. Zou,J. H. Zou
Physical Review Letters(2019)
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摘要
Using a total of 9.0 fb^{-1} of e^{+}e^{-} collision data with center-of-mass energies between 4.15 and 4.30 GeV collected by the BESIII detector, we search for the processes e^{+}e^{-}→γX(3872) with X(3872)→π^{0}χ_{cJ} for J=0, 1, 2. We report the first observation of X(3872)→π^{0}χ_{c1}, a new decay mode of the X(3872), with a statistical significance of more than 5σ for all systematic fit variations. Normalizing to the previously established process e^{+}e^{-}→γX(3872) with X(3872)→π^{+}π^{-}J/ψ, we find B(X(3872)→π^{0}χ_{c1})/B(X(3872)→π^{+}π^{-}J/ψ)=0.88_{-0.27}^{+0.33}±0.10, where the first error is statistical and the second is systematic. We set 90% confidence level upper limits on the corresponding ratios for the decays to π^{0}χ_{c0} and π^{0}χ_{c2} of 19 and 1.1, respectively.