单极化 $\Lambda_c^+$ 形成与衰变动力学研究——基于阈值附近 $e^+e^-$ 同消散
高能物理 - 实验
2025-12-12 v3
摘要
对单极化 的研究对于阐明标准模型中的强相互作用和弱相互作用，以及洞察原子结构具有重要意义。在 实验中，可通过单光子消散过程产生成对的最小单极化 。该过程可由两个复数电磁形因子描述。这些形因子之间的非零相对相位导致 产生横向极化，从而为衰变中的动力学参数提供额外约束。在本文中，我们基于 6.4 fb 的 同消散数据（中心-of-mass 能量在 4600 MeV 至 4951 MeV 之间），采用 BESIII 检测器，首次观察到了 的横向极化。从 、、 和 衰变的联合角分布中同时提取衰变不对称参数。基于这些参数，我们提取了弱相位和强相位位移，并测试了若干 可观测量。所获结果表明， 产生的横向极化显著增强了寻找 违反效应的能力，为探索单极化介质扰动开辟了新方法。
引用
@article{arxiv.2508.11400,
title = {The Production and Decay Dynamics of the Charmed Baryon $\Lambda_c^+$ in $e^+e^-$ Annihilations near Threshold},
author = {BESIII Collaboration and M. Ablikim and M. N. Achasov and P. Adlarson and X. C. Ai and R. Aliberti and A. Amoroso and Q. An and Y. Bai and O. Bakina and Y. Ban and H. -R. Bao and V. Batozskaya and K. Begzsuren and N. Berger and M. Berlowski and M. B. Bertani and D. Bettoni and F. Bianchi and E. Bianco and A. Bortone and I. Boyko and R. A. Briere and A. Brueggemann and H. Cai and M. H. Cai and X. Cai and A. Calcaterra and G. F. Cao and N. Cao and S. A. Cetin and X. Y. Chai and J. F. Chang and T. T. Chang and G. R. Che and Y. Z. Che and C. H. Chen and Chao Chen and G. Chen and H. S. Chen and H. Y. Chen and M. L. Chen and S. J. Chen and S. L. Chen and S. M. Chen and T. Chen and X. R. Chen and X. T. Chen and X. Y. Chen and Y. B. Chen and Y. Q. Chen and Z. Chen and Z. K. Chen and J. Cheng and L. N. Cheng and S. K. Choi and X. Chu and G. Cibinetto and F. Cossio and J. Cottee-Meldrum and H. L. Dai and J. P. Dai and A. Dbeyssi and R. E. de Boer and D. Dedovich and C. Q. Deng and Z. Y. Deng and A. Denig and I. Denisenko and M. Destefanis and F. De Mori and B. Ding and X. X. Ding and Y. Ding and Y. Ding and Y. X. Ding and J. Dong and L. Y. Dong and M. Y. Dong and X. Dong and M. C. Du and S. X. Du and S. X. Du and X. L. Du and Y. Y. Duan and Z. H. Duan and P. Egorov and G. F. Fan and J. J. Fan and Y. H. Fan and J. Fang and J. Fang and S. S. Fang and W. X. Fang and Y. Q. Fang and R. Farinelli and L. Fava and F. Feldbauer and G. Felici and C. Q. Feng and J. H. Feng and L. Feng and Q. X. Feng and Y. T. Feng and M. Fritsch and C. D. Fu and J. L. Fu and Y. W. Fu and H. Gao and X. B. Gao and Y. Gao and Y. N. Gao and Y. N. Gao and Y. Y. Gao and Z. Gao and S. Garbolino and I. Garzia and L. Ge and P. T. Ge and Z. W. Ge and C. Geng and E. M. Gersabeck and A. Gilman and K. Goetzen and J. Gollub and J. D. Gong and L. Gong and W. X. Gong and W. Gradl and S. Gramigna and M. Greco and M. H. Gu and Y. T. Gu and C. Y. Guan and A. Q. Guo and J. N. Guo and L. B. Guo and M. J. Guo and R. P. Guo and X. Guo and Y. P. Guo and A. Guskov and J. Gutierrez and K. L. Han and T. T. Han and F. Hanisch and K. D. Hao and X. Q. Hao and F. A. Harris and K. K. He and K. L. He and F. H. Heinsius and C. H. Heinz and Y. K. Heng and C. Herold and P. C. Hong and G. Y. Hou and X. T. Hou and Y. R. Hou and Z. L. Hou and H. M. Hu and J. F. Hu and Q. P. Hu and S. L. Hu and T. Hu and Y. Hu and Z. M. Hu and G. S. Huang and K. X. Huang and L. Q. Huang and P. Huang and X. T. Huang and Y. P. Huang and Y. S. Huang and T. Hussain and N. Hüsken and N. in der Wiesche and J. Jackson and Q. Ji and Q. P. Ji and W. Ji and X. B. Ji and X. L. Ji and X. Q. Jia and Z. K. Jia and D. Jiang and H. B. Jiang and P. C. Jiang and S. J. Jiang and X. S. Jiang and Y. Jiang and J. B. Jiao and J. K. Jiao and Z. Jiao and S. Jin and Y. Jin and M. Q. Jing and X. M. Jing and T. Johansson and S. Kabana and X. L. Kang and X. S. Kang and B. C. Ke and V. Khachatryan and A. Khoukaz and O. B. Kolcu and B. Kopf and L. Kröger and M. Kuessner and X. Kui and N. Kumar and A. Kupsc and W. Kühn and Q. Lan and W. N. Lan and T. T. Lei and M. Lellmann and T. Lenz and C. Li and C. Li and C. H. Li and C. K. Li and D. M. Li and F. Li and G. Li and H. B. Li and H. J. Li and H. N. Li and Hui Li and J. R. Li and J. S. Li and J. W. Li and K. Li and K. L. Li and K. L. Li and L. J. Li and Lei Li and M. H. Li and M. R. Li and P. L. Li and P. R. Li and Q. M. Li and Q. X. Li and R. Li and S. X. Li and T. Li and T. Y. Li and W. D. Li and W. G. Li and X. Li and X. H. Li and X. L. Li and X. Y. Li and X. Z. Li and Y. Li and Y. G. Li and Y. P. Li and Z. J. Li and Z. X. Li and Z. Y. Li and C. Liang and H. Liang and Y. F. Liang and Y. T. Liang and G. R. Liao and L. B. Liao and M. H. Liao and Y. P. Liao and J. Libby and A. Limphirat and C. C. Lin and D. X. Lin and L. Q. Lin and T. Lin and B. J. Liu and B. X. Liu and C. Liu and C. X. Liu and F. Liu and F. H. Liu and Feng Liu and G. M. Liu and H. Liu and H. B. Liu and H. H. Liu and H. M. Liu and Huihui Liu and J. B. Liu and J. J. Liu and K. Liu and K. Liu and K. Y. Liu and Ke Liu and L. C. Liu and Lu Liu and M. H. Liu and P. L. Liu and Q. Liu and S. B. Liu and T. Liu and W. M. Liu and W. T. Liu and X. Liu and X. Liu and X. K. Liu and X. L. Liu and X. Y. Liu and Y. Liu and Y. Liu and Y. B. Liu and Z. A. Liu and Z. D. Liu and Z. Q. Liu and X. C. Lou and H. J. Lu and J. G. Lu and X. L. Lu and Y. Lu and Y. H. Lu and Y. P. Lu and Z. H. Lu and C. L. Luo and J. R. Luo and J. S. Luo and M. X. Luo and T. Luo and X. L. Luo and Z. Y. Lv and X. R. Lyu and Y. F. Lyu and Y. H. Lyu and F. C. Ma and H. L. Ma and Heng Ma and J. L. Ma and L. L. Ma and L. R. Ma and Q. M. Ma and R. Q. Ma and R. Y. Ma and T. Ma and X. T. Ma and X. Y. Ma and Y. M. Ma and F. E. Maas and I. MacKay and M. Maggiora and S. Malde and Q. A. Malik and H. X. Mao and Y. J. Mao and Z. P. Mao and S. Marcello and A. Marshall and F. M. Melendi and Y. H. Meng and Z. X. Meng and G. Mezzadri and H. Miao and T. J. Min and R. E. Mitchell and X. H. Mo and B. Moses and N. Yu. Muchnoi and J. Muskalla and Y. Nefedov and F. Nerling and Z. Ning and S. Nisar and Q. L. Niu and W. D. Niu and Y. Niu and C. Normand and S. L. Olsen and Q. Ouyang and S. Pacetti and X. Pan and Y. Pan and A. Pathak and Y. P. Pei and M. Pelizaeus and H. P. Peng and X. J. Peng and Y. Y. Peng and K. Peters and K. Petridis and J. L. Ping and R. G. Ping and S. Plura and V. Prasad and F. Z. Qi and H. R. Qi and M. Qi and S. Qian and W. B. Qian and C. F. Qiao and J. H. Qiao and J. J. Qin and J. L. Qin and L. Q. Qin and L. Y. Qin and P. B. Qin and X. P. Qin and X. S. Qin and Z. H. Qin and J. F. Qiu and Z. H. Qu and J. Rademacker and C. F. Redmer and A. Rivetti and M. Rolo and G. Rong and S. S. Rong and F. Rosini and Ch. Rosner and M. Q. Ruan and N. Salone and A. Sarantsev and Y. Schelhaas and K. Schoenning and M. Scodeggio and K. Y. Shan and W. Shan and X. Y. Shan and Z. J. Shang and J. F. Shangguan and L. G. Shao and M. Shao and C. P. Shen and H. F. Shen and W. H. Shen and X. Y. Shen and B. A. Shi and H. Shi and J. L. Shi and J. Y. Shi and S. Y. Shi and X. Shi and H. L. Song and J. J. Song and T. Z. Song and W. M. Song and Y. J. Song and Y. X. Song and Zirong Song and S. Sosio and S. Spataro and F. Stieler and M. Stolte and S. S Su and Y. J. Su and G. B. Sun and G. X. Sun and H. Sun and H. K. Sun and J. F. Sun and K. Sun and L. Sun and R. Sun and S. S. Sun and T. Sun and Y. C. Sun and Y. H. Sun and Y. J. Sun and Y. Z. Sun and Z. Q. Sun and Z. T. Sun and C. J. Tang and G. Y. Tang and J. Tang and J. J. Tang and L. F. Tang and Y. A. Tang and L. Y. Tao and M. Tat and J. X. Teng and J. Y. Tian and W. H. Tian and Y. Tian and Z. F. Tian and I. Uman and E. van der Smagt and B. Wang and B. Wang and Bo Wang and C. Wang and C. Wang and Cong Wang and D. Y. Wang and H. J. Wang and J. J. Wang and K. Wang and L. L. Wang and L. W. Wang and M. Wang and M. Wang and N. Y. Wang and S. Wang and S. Wang and T. Wang and T. J. Wang and W. Wang and W. Wang and W. P. Wang and X. Wang and X. F. Wang and X. J. Wang and X. L. Wang and X. N. Wang and Y. Wang and Y. D. Wang and Y. F. Wang and Y. H. Wang and Y. J. Wang and Y. L. Wang and Y. N. Wang and Y. N. Wang and Y. Q. Wang and Yaqian Wang and Yi Wang and Yuan Wang and Z. Wang and Z. Wang and Z. L. Wang and Z. L. Wang and Z. Q. Wang and Z. Y. Wang and Ziyi Wang and D. Wei and D. H. Wei and H. R. Wei and F. Weidner and S. P. Wen and Y. R. Wen and U. Wiedner and G. Wilkinson and M. Wolke and C. Wu and J. F. Wu and L. H. Wu and L. J. Wu and Lianjie Wu and S. G. Wu and S. M. Wu and X. Wu and X. H. Wu and Y. J. Wu and Z. Wu and L. Xia and X. M. Xian and B. H. Xiang and D. Xiao and G. Y. Xiao and H. Xiao and Y. L. Xiao and Z. J. Xiao and C. Xie and K. J. Xie and Y. Xie and Y. G. Xie and Y. H. Xie and Z. P. Xie and T. Y. Xing and C. F. Xu and C. J. Xu and G. F. Xu and H. Y. Xu and M. Xu and Q. J. Xu and Q. N. Xu and T. D. Xu and W. Xu and W. L. Xu and X. P. Xu and Y. Xu and Y. C. Xu and Z. S. Xu and F. Yan and F. Yan and H. Y. Yan and L. Yan and W. B. Yan and W. C. Yan and W. H. Yan and W. P. Yan and X. Q. Yan and H. J. Yang and H. L. Yang and H. X. Yang and J. H. Yang and R. J. Yang and Y. Yang and Y. H. Yang and Y. Q. Yang and Y. X. Yang and Y. Z. Yang and Z. P. Yao and M. Ye and M. H. Ye and Z. J. Ye and Junhao Yin and Z. Y. You and B. X. Yu and C. X. Yu and G. Yu and J. S. Yu and L. W. Yu and M. C. Yu and T. Yu and X. D. Yu and Y. C. Yu and C. Z. Yuan and H. Yuan and J. Yuan and J. Yuan and L. Yuan and M. K. Yuan and S. C. Yuan and S. H. Yuan and X. Q. Yuan and Y. Yuan and Z. Y. Yuan and C. X. Yue and Ying Yue and A. A. Zafar and F. R. Zeng and S. H. Zeng and X. Zeng and Y. J. Zeng and Y. J. Zeng and Y. C. Zhai and Y. H. Zhan and A. Q. Zhang and B. L. Zhang and B. X. Zhang and D. H. Zhang and G. Y. Zhang and G. Y. Zhang and H. Zhang and H. Zhang and H. C. Zhang and H. H. Zhang and H. Q. Zhang and H. R. Zhang and H. Y. Zhang and J. Zhang and J. J. Zhang and J. L. Zhang and J. Q. Zhang and J. S. Zhang and J. W. Zhang and J. X. Zhang and J. Y. Zhang and J. Z. Zhang and Jianyu Zhang and L. M. Zhang and Lei Zhang and N. Zhang and P. Zhang and Q. Zhang and Q. Y. Zhang and R. Y. Zhang and S. H. Zhang and Shulei Zhang and X. M. Zhang and X. Y Zhang and X. Y. Zhang and Y. Zhang and Y. Zhang and Y. T. Zhang and Y. H. Zhang and Y. M. Zhang and Y. P. Zhang and Z. D. Zhang and Z. H. Zhang and Z. L. Zhang and Z. L. Zhang and Z. X. Zhang and Z. Y. Zhang and Z. Y. Zhang and Z. Y. Zhang and Zh. Zh. Zhang and G. Zhao and J. Y. Zhao and J. Z. Zhao and L. Zhao and L. Zhao and M. G. Zhao and N. Zhao and R. P. Zhao and S. J. Zhao and Y. B. Zhao and Y. L. Zhao and Y. X. Zhao and Z. G. Zhao and A. Zhemchugov and B. Zheng and B. M. Zheng and J. P. Zheng and W. J. Zheng and X. R. Zheng and Y. H. Zheng and B. Zhong and C. Zhong and H. Zhou and J. Q. Zhou and S. Zhou and X. Zhou and X. K. Zhou and X. R. Zhou and X. Y. Zhou and Y. X. Zhou and Y. Z. Zhou and A. N. Zhu and J. Zhu and K. Zhu and K. J. Zhu and K. S. Zhu and L. Zhu and L. X. Zhu and S. H. Zhu and T. J. Zhu and W. D. Zhu and W. D. Zhu and W. J. Zhu and W. Z. Zhu and Y. C. Zhu and Z. A. Zhu and X. Y. Zhuang and J. H. Zou and J. Zu},
journal= {arXiv preprint arXiv:2508.11400},
year = {2025}
}
备注
20 pages,9 figures,4 tables