Observation of the $Y(4230)$ and a new structure in $e^+e^- \rightarrow K^+K^-J/\psi$-猫眼课题宝

DOI：

10.1088/1674-1137/ac945c

发表时间：

2022-04

期刊：

Chinese Physics C

影响因子：

3.6

通讯作者：

中科院分区：

物理与天体物理3区

文献类型：

作者：

B. C. M. Ablikim;M. Achasov;P. Adlarson;M. Albrecht;R. Aliberti;A. Amoroso;M. An;Q. An;X. Bai;Y. Bai;O. Bakina;R. Ferroli;I. Balossino;Y. Ban;V. Batozskaya;D. Becker;K. Begzsuren;N. Berger;M. Bertani;D. Bettoni;F. Bianchi;J. Bloms;A. Bortone;I. Boyko;R. Briere;A. Brueggemann;H. Cai;X. Cai;A. Calcaterra;G. Cao;N. Cao;S. Çetin;J. Chang;W. Chang;G. Chelkov;C. Chen;G. Chen;Huifen. Chen;M. Chen;S. Chen;T. Chen;X. Chen;X. Chen;Y. Chen;Z. Chen;W. Cheng;X. Chu;G. Cibinetto;F. Cossio;J. Cui;H. Dai;J. Dai;A. Dbeyssi;R. Boer;D. Dedovich;Z. Deng;A. Denig;I. Denysenko;M. Destefanis;F. Mori;Y. Ding;J. Dong;L. Dong;M. Dong;X. Dong;S. Du;P. Egorov;Y. Fan;J. Fang;S. Fang;W. Fang;Y. Fang;R. Farinelli;L. Fava;F. Feldbauer;G. Felici;C. Feng;J. Feng;K. Fischer;M. Fritsch;C. Fritzsch;C. Fu;H. Gao;Y. Gao;Yan‐Yan Gao;S. Garbolino;I. Garzia;P. Ge;Z. Ge;C. Geng;E. Gersabeck;A. Gilman;K. Goetzen;L. Gong;W. Gong;W. Gradl;M. Greco;L. Gu;M. Gu;Y. Gu;C. Guan;A. Guo;L. Guo;R. Guo;Y. Guo;A. Guskov;T. Han;W. Han;X. Hao;F. Harris;K. He;K. He;F. Heinsius;C. Heinz;Y. Heng;C. Herold;M. Himmelreich;T. Holtmann;G. Hou;Y. Hou;Z. Hou;H. Hu;J. Hu;T. Hu;Y. Hu;G. Huang;K. Huang;L. Huang;X. Huang;Y. Huang;Z. Huang;T. Hussain;N. Husken;W. Imoehl;M. Irshad;J. Jackson;S. Jaeger;S. Janchiv;Q. Ji;Q. Ji;X. Ji;X. Ji;Y. Ji;Z. Jia;H. Jiang;S. Jiang;X. Jiang;Y. Jiang;J. Jiao;Z. Jiao;S. Jin;Y. Jin;M. Jing;T. Johansson;N. Kalantar-Nayestanaki;X. Kang;R. Kappert;M. Kavatsyuk;B. Ke;I. Keshk;A. Khoukaz;P. Kiese;R. Kiuchi;R. Kliemt;L. Koch;O. B. Kolcu;B. Kopf;M. Kuemmel;M. Kuessner;A. Kupsc;W. Kuhn;J. J. Lane-J.;J. Lange;P. Larin;A. Lavania;L. Lavezzi;Z. Lei;H. Leithoff;M. Lellmann;T. Lenz;C. Li;C. Li;Cheng Li;D. Li;F. Li;G. Li;H. Li;H. Li;H. Li;H. Li;J. Li;J. Li;J. Li;Kenneth K. Li;L. Li;L. Li;Lei Li;M. Li;P. Li;S. Li;S. Li;T. Li;W. Li;W. Li;X. Li;X. Li;Xiaoyu Li;H. Liang;Y. Liang;Y. Liang;G. Liao;L. Liao;J. Libby;A. Limphirat;C. Lin;D. Lin;T. Lin;B. Liu;C. Liu;D. Liu;F. Liu;F. Liu;Feng. Liu;G. M. Liu;H. Liu;H. Liu;H. Liu;Huanhuan Liu;Huihui Liu;J. Liu;J. Liu;J. Liu;Li-Yu Daisy Liu;Li-Yu Daisy Liu;Li-Yu Daisy Liu;Li-Yu Daisy Liu;Lu Liu-;M. Liu;Li-Yu Daisy Liu;Q. Liu;S. Liu;T. Liu;W. Liu;W. Liu;X. Liu;Y. Liu;Y. Liu;Z. Liu;Z. Liu;X. Lou;F. Lu;H. Lu;J. Lu;X. Lu;Y. Lu;Y. Lu;Z. Lu;C. L. Luo-;M. Luo;T. Luo;X. Luo;X. Lyu;Y. Lyu;F. Ma;H. Ma;Li Ma;M. Ma;Q. Ma;R. Ma;R. Ma;X. Ma;Y. Ma;F. Maas;M. Maggiora;S. Maldaner;S. Malde;Q. A. Malik;A. Mangoni;Y. Mao;Z. Mao;S. Marcello;Z. Meng;J. Messchendorp;G. Mezzadri;H. Miao;T. Min;R. Mitchell;X. Mo;N. Muchnoi;H. Muramatsu;Y. Nefedov;F. Nerling;I. Nikolaev;Z. Ning;S. Nisar;Y. Niu;S. L. Olsen;Q. Ouyang;S. Pacetti;X. Pan;Y. Pan;A. Pathak;M. Pelizaeus;H. Peng;K. Peters;J. Pettersson;J. Ping;R. Ping;S. Plura;S. Pogodin;R. Poling;V. Prasad;F. Qi;H. Qi;H. Qi;M. Qi;T. Qi;S. Qian;W. B. Qian-;Z. Qian;C. Qiao;J. Qin;L. Qin;X. Qin;X. Qin;Z. Qin;J. Qiu;S. Qu;K. H. Rashid;C. Redmer;K. Ren;A. Rivetti;V. Rodin;M. Rolo;G. Rong;C. Rosner;S. Ruan;H. Sang;A. Sarantsev;Y. Schelhaas;C. Schnier;K. Schoenning;M. Scodeggio;K. Shan;W. Shan;X. Shan;J. Shangguan;L. Shao;M. Shao;C. Shen;H. Shen;X. Shen;B. Shi;H. Shi;J. Shi;R. Shi;X. Shi;X. Shi;J. Song;W. Song;Y. Song;S. Sosio;S. Spataro;F. Stieler;K. Su;P. Su;Y. Su;G. Sun;H. Sun;H. Sun;J. Sun;L. Sun;S. Sun;T. Sun;W. Sun;X. Sun;Y. Sun;Y. Sun;Z. Sun;Y. Tan;Y. Tan;C. Tang;G. Tang;J. Tang;L. Tao;Q. Tao;J. Teng;V. Thorén;W. Tian;Y. Tian;I. Uman;B. Wang;B. Wang;C. Wang;D. Wang;F. Wang;H. Wang;H. Wang;K. Wang;L. Wang;M. Wang;M. Wang;Meng Wang;S. Wang;T. Wang;T. Wang;W. Wang;W. Wang;W. Wang;X. Wang;X. Wang;X. L. Wang;Y. Wang;Y. Wang;Y. Wang;Y. Wang;Yaqian Wang;Z. Wang;Z. Wang;Ziyi Wang;D. Wei;F. Weidner;S. Wen;D. White;U. Wiedner;G. Wilkinson;M. Wolke;L. Wollenberg;J. Wu;L. Wu;L. Wu;X. Wu;X. Wu;Y. Wu;Z. Wu;L. Xia;T. Xiang;D. Xiao;G. Xiao;H. Xiao;S. Xiao;Y. Xiao;Z. Xiao;C. Xie;X. Xie;Y. Xie;Y. Xie;Y. Xie;Z. Xie;T. Xing;C. Xu;C. Xu;G. Xu;H. Xu;Q. Xu;X. Xu;Y. Xu;Z. Xu;F. Yan;L. Yan;W. Yan;W. Yan;Hang Yang;H. Yang;Hang Yang;L. Yang;S. Yang;T. Yang;Y. Yang;Y. Yang;Yifan Yang;M. Ye;M. Ye;J. Yin;Z. You;B. Yu;C. Yu;G. Yu;T. Yu;C. Yuan;Lijuan Yuan;S. Yuan;X. Yuan;Y. Yuan;Z. Yuan;C. Yue;A. Zafar;F. Zeng;X. Zeng;Y. Zeng;Y. Zhan;A. Zhang;B. Zhang;B. Zhang;D. Zhang;G. Zhang;Houyu Zhang;Houyu Zhang;H. Zhang;J. Zhang;J. Zhang;J. Zhang;J. X. Zhang;J. Zhang;J. Zhang;Jianyu Zhang;Jiawei Zhang;L. Zhang;L. Zhang;Lei. Zhang;P. Zhang;Q. Zhang;Shuihan Zhang;Shulei Zhang;X. Zhang;X. Zhang;X. Zhang;Y. Zhang;Y. Zhang;Y. Zhang;Yan Zhang;Yao Zhang;Z. Zhang;Z. Zhang;G. Zhao;J. Zhao;J. Zhao;J. Zhao;Lei Zhao;Ling Zhao;M. Zhao;Q. Zhao;S. Zhao;Y. Zhao;Y. Zhao;Z. Zhao;A. Zhemchugov;B. Zheng;J. Zheng;Y. Zheng;B. Zhong;C. Zhong;X. Zhong;H. Zhou;L. Zhou;X. Zhou;X. Zhou;X. Zhou;X. Zhou;Yanlin Zhou;J. Zhu;K. Zhu;K. Zhu;L. Zhu;S. Zhu;S. Zhu;T. Zhu;W. Zhu;Y. Zhu;Z. Zhu;B. Zou;J. Zou

$e^+e^- \rightarrow K^+K^-J/\psi$ 在质心能量从 4.127 到 4.600~GeV 的截面是根据在 BEPCII 存储环上运行的 BESIII 探测器收集的 15.6 fb$^{-1}$ 数据测量的。在横截面的线形状中观察到两个共振结构。第一个结构的质量和宽度经测量分别为 ($4225.3\pm2.3\pm21.5$) MeV 和 ($72.9\pm6.1\pm30.8$)~MeV。它们与已建立的$Y(4230)$一致。第二个结构为首次观察到，统计显着性大于8$\sigma$，记为$Y(4500)$。其质量和宽度分别确定为 ($4484.7\pm13.3\pm24.1$) MeV 和 ($111.1\pm30.1\pm15.2$) MeV。第一个提出的不确定性是统计性的，第二个是系统性的。报告电子部分宽度与衰变分支分数 $ \Gamma(Y(4230)\to e^+ e^-) \mathcal{B}(Y(4230) \to K^+ K^- J/\psi)$ 的乘积。本作品的内容可以根据 Creative Commons Attribution 3.0 许可证的条款使用。本作品的任何进一步分发都必须保留作者的归属以及作品的标题、期刊引文和 DOI。文章由SCOAP3资助，经中国物理学会、中国科学院高能物理研究所、中国科学院近代物理研究所和IOP出版社授权出版。

The cross sections of $e^+e^- \rightarrow K^+K^-J/\psi$ at center-of-mass energies from 4.127 to 4.600~GeV are measured based on 15.6 fb$^{-1}$ data collected with the BESIII detector operating at the BEPCII storage ring. Two resonant structures are observed in the line shape of the cross sections. The mass and width of the first structure are measured to be ($4225.3\pm2.3\pm21.5$) MeV and ($72.9\pm6.1\pm30.8$)~MeV, respectively. They are consistent with those of the established $Y(4230)$. The second structure is observed for the first time with a statistical significance greater than 8$\sigma$, denoted as $Y(4500)$. Its mass and width are determined to be ($4484.7\pm13.3\pm24.1$) MeV and ($111.1\pm30.1\pm15.2$) MeV, respectively. The first presented uncertainties are statistical and the second ones are systematic. The product of the electronic partial width with the decay branching fraction $ \Gamma(Y(4230)\to e^+ e^-) \mathcal{B}(Y(4230) \to K^+ K^- J/\psi)$ is reported.Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

Observation of the $Y(4230)$ and a new structure in $e^+e^- \rightarrow K^+K^-J/\psi$

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