Search for the reaction channel e+e−→ηcηπ+π− at center-of-mass energies from 4.23 to 4.…
M. Ablikim,М. Н. Ачасов,P. Adlarson,S. Ahmed,M. Albrecht,M. Alekseev,A. Amoroso,F. F. An,Q. An,Y. Bai,O. Bakina,R. Baldini Ferroli,I. Balossino,Y. Ban,K. Begzsuren,J. V. Bennett,N. Berger,M. Bertani,D. Bettoni,F. Bianchi,J. Biernat,J. Bloms,I. 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. 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,Chao Dong,J. Dong,L. Y. Dong,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,Y. Gao,Z. Gao,B. Garillon,I. Garzia,E. 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,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,M. Himmelreich,Y. R. Hou,Z. L. Hou,H. M. Hu,J. Hu,T. Hu,Y. Hu,G. S. Huang,J. S. Huang,X. T. Huang,X. Z. Huang,N. Huesken,T. Hussain,W. Ikegami Andersson,W. Imoehl,M. Irshad,Q. Ji,Q. P. Ji,X. B. Ji,X. L. Ji,H. L. Jiang,Xiaojie 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,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,Jiaqi 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,Z. B. Li,Z. Y. Li,H. Liang,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,L. Y. 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. J. Lü,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,S. Malde,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,H. R. Qi,M. Qi,T. Y. Qi,S. J. Qian,C. F. Qiao,Ning Qin,X. P. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,S. Q. Qu,K. H. Rashid,K. Ravindran,C. F. Redmer,Markus Richter,A. Rivetti,V. Rodin,M. Rolo,G. Rong,Ch. Rosner,M. Rump,A. Sarantsev,M. Savrié,Y. Schelhaas,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. H. Sun,Y. J. Sun,Y. 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,K. Wang,L. L. Wang,L. S. Wang,M. Wang,M. Z. Wang,Meng Wang,P. L. Wang,R. M. Wang,W. P. Wang,X. Wang,X. F. Wang,X. L. Wang,Y. 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,Hao Wen,S. P. Wen,U. Wiedner,G. Wilkinson,M. Wolke,L. H. Wu,L. J. Wu,Zhi Wang,L. Xia,Y. Xia,S. Y. Xiao,Yunlong Xiao,Z. J. Xiao,Y. Xie,Y. Xie,T. Y. Xing,X. A. Xiong,Q. L. Xiu,G. F. Xu,J. Xu,Lei Xu,Q. J. Xu,Wei 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,Z. Yang,M. Ye,Minhui Ye,J. H. Yin,You Zhou,B. X. Yu,C. X. Yu,Jie Yu,T. Yu,C. Z. Yuan,X. 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. W. Zhang,J. Y. Zhang,J. Z. Zhang,K. Zhang,L. Zhang,L. Zhang,S. F. Zhang,T. J. Zhang,X. Y. Zhang,Y. Zhang,Y. H. Zhang,Y. T. Zhang,Yang Zhang,Yao Zhang,Yi Zhang,Yu Zhang,Z. H. Zhang,Z. P. Zhang,Z. Y. Zhang,G. Zhao,J. W. Zhao,J. Y. 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,L. Zhou,Zhou Li,Q. Zhou,X. Y. Zhou,X. K. Zhou,X. R. Zhou,X. K. Zhou,X. R. Zhou,A. N. Zhu,Jiang Zhu,Jiang Zhu,K. Zhu,K. 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（2021）
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摘要
Using data collected with the BESIII detector operating at the Beijing Electron Positron Collider, we search for the process e+e−→ηcηπ+π−. The search is performed using five large datasets recorded at center-of-mass energies of 4.23, 4.26, 4.36, 4.42, and 4.60 GeV. The ηc meson is reconstructed in 16 exclusive decay modes. No signal is observed in the ηc mass region at any center-of-mass energy. The upper limits on the reaction cross sections are determined to be 6.2, 10.8, 27.6, 22.6 and 23.7 pb at the 90% confidence level at the center-of-mass energies listed above.Received 30 November 2020Accepted 15 January 2021DOI:https://doi.org/10.1103/PhysRevD.103.032004Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasParticle decaysParticle interactionsParticle productionQuark modelParticles & Fields
