Observation of a near-threshold enhancement in the $\Lambda\bar{\Lambda}$ mass spectrum from $e^+e^-\to\phi\Lambda\bar{\Lambda}$ at $\sqrt{s}$ from 3.51 to 4.60 GeV
High Energy Physics - Experiment
2021-09-22 v2
Abstract
The process is studied using data samples collected with the BESIII detector at the BEPCII collider at center-of-mass energies ranging from to . An intermediate resonance structure is observed near the threshold of . It has a mass of and a width of , where the quoted uncertainties are statistical and systematic, respectively. The quantum numbers of and are rejected, while other hypotheses are possible, according to the helicity angle study. The energy-dependent cross section of the process is measured for the first time in this energy region, and contributions from excited states and vector charmonium-like -states are investigated.
Keywords
Cite
@article{arxiv.2104.08754,
title = {Observation of a near-threshold enhancement in the $\Lambda\bar{\Lambda}$ mass spectrum from $e^+e^-\to\phi\Lambda\bar{\Lambda}$ at $\sqrt{s}$ from 3.51 to 4.60 GeV},
author = {M. Ablikim and M. N. Achasov and P. Adlarson and S. Ahmed and M. Albrecht and R. Aliberti and A. Amoroso and M. R. An and Q. An and X. H. Bai and Y. Bai and O. Bakina and R. Baldini Ferroli and I. Balossino and Y. Ban and K. Begzsuren and N. Berger and M. Bertani and D. Bettoni and F. Bianchi and J. Bloms and A. Bortone and I. Boyko and R. A. Briere and H. Cai and X. Cai and A. Calcaterra and G. F. Cao and N. Cao and S. A. Cetin and J. F. Chang and W. L. Chang and G. Chelkov and D. Y. Chen and G. Chen and H. S. Chen and M. L. Chen and S. J. Chen and X. R. Chen and Y. B. Chen and Z. J Chen and W. S. Cheng and G. Cibinetto and F. Cossio and X. F. Cui and H. L. Dai and X. C. Dai and A. Dbeyssi and R. E. de Boer and D. Dedovich and Z. Y. Deng and A. Denig and I. Denysenko and M. Destefanis and F. De Mori and Y. Ding and C. Dong and J. Dong and L. Y. Dong and M. Y. Dong and X. Dong and S. X. Du and Y. L. Fan and J. Fang and S. S. Fang and Y. Fang and R. Farinelli and L. Fava and F. Feldbauer and G. Felici and C. Q. Feng and J. H. Feng and M. Fritsch and C. D. Fu and Y. Gao and Y. Gao and Y. Gao and Y. G. Gao and I. Garzia and P. T. Ge and C. Geng and E. M. Gersabeck and A Gilman and K. Goetzen and L. Gong and W. X. Gong and W. Gradl and M. Greco and L. M. Gu and M. H. Gu and Y. T. Gu and C. Y Guan and A. Q. Guo and L. B. Guo and R. P. Guo and Y. P. Guo and A. Guskov and T. T. Han and W. Y. Han and X. Q. Hao and F. A. Harris and K. L. He and F. H. Heinsius and C. H. Heinz and T. Held and Y. K. Heng and C. Herold and M. Himmelreich and T. Holtmann and G. Y. Hou and Y. R. Hou and Z. L. Hou and H. M. Hu and J. F. Hu and T. Hu and Y. Hu and G. S. Huang and L. Q. Huang and X. T. Huang and Y. P. Huang and Z. Huang and T. Hussain and N Hüsken and W. Ikegami Andersson and W. Imoehl and M. Irshad and S. Jaeger and S. Janchiv and Q. Ji and Q. P. Ji and X. B. Ji and X. L. Ji and Y. Y. Ji and H. B. Jiang and X. S. Jiang and J. B. Jiao and Z. Jiao and S. Jin and Y. Jin and M. Q. Jing and T. Johansson and N. Kalantar-Nayestanaki and X. S. Kang and R. Kappert and M. Kavatsyuk and B. C. Ke and I. K. Keshk and A. Khoukaz and P. Kiese and R. Kiuchi and R. Kliemt and L. Koch and O. B. Kolcu and B. Kopf and M. Kuemmel and M. Kuessner and A. Kupsc and M. G. Kurth and W. Kühn and J. J. Lane and J. S. Lange and P. Larin and A. Lavania and L. Lavezzi and Z. H. Lei and H. Leithoff and M. Lellmann and T. Lenz and C. Li and C. H. Li and Cheng Li and D. M. Li and F. Li and G. Li and H. Li and H. Li and H. B. Li and H. J. Li and J. L. Li and J. Q. Li and J. S. Li and Ke Li and L. K. Li and Lei Li and P. R. Li and S. Y. Li and W. D. Li and W. G. Li and X. H. Li and X. L. Li and Xiaoyu Li and Z. Y. Li and H. Liang and H. Liang and H. Liang and Y. F. Liang and Y. T. Liang and G. R. Liao and L. Z. Liao and J. Libby and C. X. Lin and B. J. Liu and C. X. Liu and D. Liu and F. H. Liu and Fang Liu and Feng Liu and H. B. Liu and H. M. Liu and Huanhuan Liu and Huihui Liu and J. B. Liu and J. L. Liu and J. Y. Liu and K. Liu and K. Y. Liu and L. Liu and M. H. Liu and P. L. Liu and Q. Liu and Q. Liu and S. B. Liu and Shuai Liu and T. Liu and W. M. Liu and X. Liu and Y. Liu and Y. B. Liu and Z. A. Liu and Z. Q. Liu and X. C. Lou and F. X. Lu and H. J. Lu and J. D. Lu and J. G. Lu and X. L. Lu and Y. Lu and Y. P. Lu and C. L. Luo and M. X. Luo and P. W. Luo and T. Luo and X. L. Luo and X. R. Lyu and F. C. Ma and H. L. Ma and L. L. Ma and M. M. Ma and Q. M. Ma and R. Q. Ma and R. T. Ma and X. X. Ma and X. Y. Ma and F. E. Maas and M. Maggiora and S. Maldaner and S. Malde and Q. A. Malik and A. Mangoni and Y. J. Mao and Z. P. Mao and S. Marcello and Z. X. Meng and J. G. Messchendorp and G. Mezzadri and T. J. Min and R. E. Mitchell and X. H. Mo and Y. J. Mo and N. Yu. Muchnoi and H. Muramatsu and S. Nakhoul and Y. Nefedov and F. Nerling and I. B. Nikolaev and Z. Ning and S. Nisar and Q. Ouyang and S. Pacetti and X. Pan and Y. Pan and A. Pathak and A. Pathak and P. Patteri and M. Pelizaeus and H. P. Peng and K. Peters and J. Pettersson and J. L. Ping and R. G. Ping and S. Pogodin and R. Poling and V. Prasad and H. Qi and H. R. Qi and K. H. Qi and M. Qi and T. Y. Qi and S. Qian and W. B. Qian and Z. Qian and C. F. Qiao and L. Q. Qin and X. P. Qin and X. S. Qin and Z. H. Qin and J. F. Qiu and S. Q. Qu and K. H. Rashid and K. Ravindran and C. F. Redmer and A. Rivetti and V. Rodin and M. Rolo and G. Rong and Ch. Rosner and M. Rump and H. S. Sang and A. Sarantsev and Y. Schelhaas and C. Schnier and K. Schoenning and M. Scodeggio and D. C. Shan and W. Shan and X. Y. Shan and J. F. Shangguan and M. Shao and C. P. Shen and H. F. Shen and P. X. Shen and X. Y. Shen and H. C. Shi and R. S. Shi and X. Shi and X. D Shi and J. J. Song and W. M. Song and Y. X. Song and S. Sosio and S. Spataro and K. X. Su and P. P. Su and F. F. Sui and G. X. Sun and H. K. Sun and J. F. Sun and L. Sun and S. S. Sun and T. Sun and W. Y. Sun and W. Y. Sun and X Sun and Y. J. Sun and Y. K. Sun and Y. Z. Sun and Z. T. Sun and Y. H. Tan and Y. X. Tan and C. J. Tang and G. Y. Tang and J. Tang and J. X. Teng and V. Thoren and W. H. Tian and Y. T. Tian and I. Uman and B. Wang and C. W. Wang and D. Y. Wang and H. J. Wang and H. P. Wang and K. Wang and L. L. Wang and M. Wang and M. Z. Wang and Meng Wang and W. Wang and W. H. Wang and W. P. Wang and X. Wang and X. F. Wang and X. L. Wang and Y. Wang and Y. Wang and Y. D. Wang and Y. F. Wang and Y. Q. Wang and Y. Y. Wang and Z. Wang and Z. Y. Wang and Ziyi Wang and Zongyuan Wang and D. H. Wei and F. Weidner and S. P. Wen and D. J. White and U. Wiedner and G. Wilkinson and M. Wolke and L. Wollenberg and J. F. Wu and L. H. Wu and L. J. Wu and X. Wu and Z. Wu and L. Xia and H. Xiao and S. Y. Xiao and Z. J. Xiao and X. H. Xie and Y. G. Xie and Y. H. Xie and T. Y. Xing and G. F. Xu and Q. J. Xu and W. Xu and X. P. Xu and Y. C. Xu and F. Yan and L. Yan and W. B. Yan and W. C. Yan and Xu Yan and H. J. Yang and H. X. Yang and L. Yang and S. L. Yang and Y. X. Yang and Yifan Yang and Zhi Yang and M. Ye and M. H. Ye and J. H. Yin and Z. Y. You and B. X. Yu and C. X. Yu and G. Yu and J. S. Yu and T. Yu and C. Z. Yuan and L. Yuan and X. Q. Yuan and Y. Yuan and Z. Y. Yuan and C. X. Yue and A. A. Zafar and X. Zeng Zeng and Y. Zeng and A. Q. Zhang and B. X. Zhang and Guangyi Zhang and H. Zhang and H. H. Zhang and H. H. Zhang and H. Y. Zhang and J. J. Zhang and J. L. Zhang and J. Q. Zhang and J. W. Zhang and J. Y. Zhang and J. Z. Zhang and Jianyu Zhang and Jiawei Zhang and L. M. Zhang and L. Q. Zhang and Lei Zhang and S. Zhang and S. F. Zhang and Shulei Zhang and X. Zhang and X. D. Zhang and X. Y. Zhang and Y. Zhang and Y. T. Zhang and Y. H. Zhang and Yan Zhang and Yao Zhang and Z. H. Zhang and Z. Y. Zhang and G. Zhao and J. Zhao and J. Y. Zhao and J. Z. Zhao and Lei Zhao and Ling Zhao and M. G. Zhao and Q. Zhao and S. J. Zhao and Y. B. Zhao and Y. X. Zhao and Z. G. Zhao and A. Zhemchugov and B. Zheng and J. P. Zheng and Y. Zheng and Y. H. Zheng and B. Zhong and C. Zhong and L. P. Zhou and Q. Zhou and X. Zhou and X. K. Zhou and X. R. Zhou and X. Y. Zhou and A. N. Zhu and J. Zhu and K. Zhu and K. J. Zhu and S. H. Zhu and T. J. Zhu and W. J. Zhu and W. J. Zhu and Y. C. Zhu and Z. A. Zhu and B. S. Zou and J. H. Zou},
journal= {arXiv preprint arXiv:2104.08754},
year = {2021}
}