单 Cabibbo 压低衰变 $\Lambda_c^+\to p\pi^0$ 的证据
高能物理 - 实验
2024-06-04 v6
摘要
基于 BESIII 探测器在 BEPCII 对撞机上于 4.600 至 4.843 GeV 质心能量收集的 6.0 碰撞数据，首次报道了单 Cabibbo 压低衰变 的证据，统计显著性为 。测得 的绝对分支比为 。结合 的分支比 ，计算出 与 的分支比之比为 。作为描述粲重子衰变机制的理论模型的重要输入，我们的结果表明非因子化贡献起着关键作用，且其与所述因子化贡献的干涉不应显著。此外，测得 的绝对分支比为 。
引用
@article{arxiv.2311.06883,
title = {Evidence of the Singly Cabibbo Suppressed decay $\Lambda_c^+\to p\pi^0$},
author = {BESIII Collaboration and M. Ablikim and M. N. Achasov and P. Adlarson and X. C. Ai and R. Aliberti and A. Amoroso and M. R. An and Q. An and Y. Bai and O. Bakina and I. Balossino and Y. Ban and V. Batozskaya and K. Begzsuren and N. Berger and M. Berlowski and M. 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 X. Cai and A. Calcaterra and G. F. Cao and N. Cao and S. A. Cetin and J. F. Chang and T. T. Chang and W. L. Chang and G. R. Che and G. Chelkov and C. Chen and Chao Chen and G. Chen and H. S. Chen and M. L. Chen and S. J. Chen and S. M. Chen and T. Chen and X. R. Chen and X. T. Chen and Y. B. Chen and Y. Q. Chen and Z. J. Chen and W. S. Cheng and S. K. Choi and X. Chu and G. Cibinetto and S. C. Coen and F. Cossio and J. J. Cui and H. L. Dai and J. P. 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 B. Ding and X. X. Ding and Y. Ding and Y. Ding and J. Dong and L. Y. Dong and M. Y. Dong and X. Dong and M. C. Du and S. X. Du and Z. H. Duan and P. Egorov and Y. H. Y. Fan and Y. L. Fan and J. Fang and S. S. Fang and W. X. 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 K Fischer and M. Fritsch and C. Fritzsch and C. D. Fu and J. L. Fu and Y. W. Fu and H. Gao and Y. N. Gao and Yang Gao and S. Garbolino and I. Garzia and P. T. Ge and Z. W. 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 S. Gramigna and M. Greco and M. H. Gu and C. Y Guan and Z. L. Guan and A. Q. Guo and L. B. Guo and M. J. 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. K. He and K. L. He and F. H H. Heinsius and C. H. Heinz and Y. K. Heng and C. Herold and T. Holtmann 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 T. Hu and Y. Hu and G. S. Huang and K. X. Huang and L. Q. Huang and X. T. Huang and Y. P. Huang and T. Hussain and N Hüsken and W. Imoehl and J. Jackson and S. Jaeger and S. Janchiv and J. H. Jeong and Q. Ji and Q. P. Ji and X. B. Ji and X. L. Ji and Y. Y. Ji and X. Q. Jia and Z. K. Jia and H. J. Jiang and P. C. Jiang and S. S. Jiang and T. J. Jiang and X. S. Jiang and Y. Jiang and Y. Jiang and J. B. Jiao and Z. Jiao and S. Jin and Y. Jin and M. Q. Jing and T. Johansson and X. K. and S. Kabana and N. Kalantar-Nayestanaki and X. L. Kang and X. S. Kang and M. Kavatsyuk and B. C. Ke and A. Khoukaz and R. Kiuchi and R. Kliemt and O. B. Kolcu and B. Kopf and M. Kuessner and A. Kupsc and W. Kühn and J. J. Lane and P. Larin and A. Lavania and L. Lavezzi and T. T. Lei and Z. H. Lei and H. Leithoff and M. Lellmann and T. Lenz and C. Li 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. 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. L. Li and Ke Li and L. J Li and L. K. Li and Lei Li and M. H. Li and P. R. Li and Q. X. Li and S. X. Li and T. Li and W. D. Li and W. G. Li and X. H. Li and X. L. Li and Xiaoyu Li and Y. G. Li and Z. J. Li and C. Liang 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 Y. P. Liao and J. Libby and A. Limphirat and D. X. Lin and T. Lin and B. J. Liu and B. X. Liu and C. Liu and C. X. Liu and F. H. Liu and Fang Liu and Feng Liu and G. M. Liu and H. 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 Ke Liu and L. 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. K. Liu and W. M. Liu and X. Liu and Y. 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. G. Lu and X. L. Lu and Y. Lu and Y. P. Lu and Z. H. Lu and C. L. Luo and M. X. Luo and T. Luo and X. L. Luo and X. R. Lyu and Y. F. Lyu and F. C. Ma and H. L. Ma and J. L. Ma and L. L. Ma and M. M. Ma and Q. M. Ma and R. Q. Ma and R. T. Ma and X. Y. Ma and Y. Ma and Y. M. Ma and F. E. Maas and M. Maggiora 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 H. Miao and T. J. Min and R. E. Mitchell and X. H. Mo and N. Yu. Muchnoi and J. Muskalla and Y. Nefedov and F. Nerling and I. B. Nikolaev and Z. Ning and S. Nisar and W. D. Niu and Y. Niu and S. L. Olsen and Q. Ouyang and S. Pacetti and X. Pan and Y. Pan and A. Pathak and P. Patteri and Y. P. Pei and M. Pelizaeus and H. P. Peng and K. Peters and J. L. Ping and R. G. Ping and S. Plura and S. Pogodin and V. Prasad and F. Z. Qi and H. Qi and H. R. Qi and M. Qi and T. Y. Qi and S. Qian and W. B. Qian and C. F. Qiao and J. J. Qin 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 C. F. Redmer and K. J. Ren and A. Rivetti and M. Rolo and G. Rong and Ch. Rosner and S. N. 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 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. C. Shi and J. L. Shi and J. Y. Shi and Q. Q. Shi and R. S. Shi and X. Shi and J. J. Song and T. Z. Song and W. M. Song and Y. J. Song and Y. X. Song and S. Sosio and S. Spataro and F. Stieler 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 S. S. Sun and T. Sun and W. Y. Sun and Y. Sun and Y. J. Sun and Y. Z. Sun and Z. T. Sun and Y. X. Tan and C. J. Tang and G. Y. Tang and J. Tang and Y. A. Tang and L. Y Tao and Q. T. Tao and M. Tat and J. X. Teng and V. Thoren and W. H. Tian and W. H. Tian and Y. Tian and Z. F. Tian and I. Uman and S. J. Wang and B. Wang and B. L. Wang and Bo Wang and C. W. Wang and D. Y. Wang and F. Wang and H. J. Wang and H. P. Wang and J. P. Wang and K. Wang and L. L. Wang and M. Wang and Meng 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 Y. Wang and Y. D. Wang and Y. F. Wang and Y. H. Wang and Y. N. Wang and Y. Q. Wang and Yaqian Wang and Yi Wang and Z. Wang and Z. L. Wang and Z. Y. Wang and Ziyi Wang and D. Wei and D. H. Wei and F. Weidner and S. P. Wen and C. W. Wenzel and U. Wiedner and G. Wilkinson and M. Wolke and L. Wollenberg and C. Wu and J. F. Wu and L. H. Wu and L. J. Wu and X. Wu and X. H. Wu and Y. Wu and Y. H. Wu and Y. J. Wu and Z. Wu and L. Xia and X. M. Xian and T. Xiang and D. Xiao and G. Y. Xiao and S. Y. Xiao and Y. L. Xiao and Z. J. Xiao and C. Xie and X. H. 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 Q. J. Xu and Q. N. Xu and W. Xu and W. L. Xu and X. P. Xu and Y. C. Xu and Z. P. Xu and Z. S. Xu and F. Yan and L. Yan and W. B. Yan and W. C. Yan and X. Q. Yan and H. J. Yang and H. L. Yang and H. X. Yang and Tao Yang and Y. Yang and Y. F. Yang and Y. X. Yang and Yifan Yang and Z. W. Yang and Z. P. Yao 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 X. D. Yu and C. Z. Yuan and L. Yuan and S. C. Yuan and X. Q. Yuan and Y. Yuan and Z. Y. Yuan and C. X. Yue and A. A. Zafar and F. R. Zeng and X. Zeng and Y. Zeng and Y. J. Zeng and X. Y. Zhai 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 H. Zhang and H. H. Zhang and H. H. Zhang and H. Q. Zhang and H. Y. Zhang and J. Zhang and J. J. Zhang and J. L. Zhang and J. Q. Zhang and J. W. Zhang and J. X. 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 P. Zhang and Q. Y. Zhang and Shuihan Zhang and Shulei Zhang and X. D. Zhang and X. M. Zhang and X. Y. Zhang and Xuyan Zhang and 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. L. Zhang and Z. Y. 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 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 W. J. Zheng and Y. H. Zheng and B. Zhong and X. Zhong and H. Zhou and L. P. Zhou and X. Zhou and X. K. Zhou and X. R. Zhou and X. Y. Zhou and Y. Z. Zhou and J. Zhu and K. Zhu and K. J. Zhu and L. Zhu and L. X. Zhu and S. H. Zhu and S. Q. Zhu and T. J. Zhu and W. J. Zhu and Y. C. Zhu and Z. A. Zhu and J. H. Zou and J. Zu},
journal= {arXiv preprint arXiv:2311.06883},
year = {2024}
}
备注
9 pages, 3 figures