First study of antihyperon-nucleon scattering Λ̅p→Λ̅p and measurement of Λ p→Λ p cross section

BESIII Collaboration,M. Ablikim,M. N. Achasov,P. Adlarson,O. Afedulidis, X. C. Ai,R. Aliberti,A. Amoroso,Q. An,Y. Bai,O. Bakina,I. Balossino,Y. Ban,H. -R. Bao,V. Batozskaya,K. Begzsuren,N. Berger,M. Berlowski,M. Bertani,D. Bettoni,F. Bianchi,E. Bianco,A. Bortone,I. Boyko,R. A. Briere,A. Brueggemann,H. Cai,X. Cai,A. Calcaterra,G. F. Cao,N. Cao,S. A. Cetin,J. F. Chang,G. R. Che,G. Chelkov,C. Chen,C. H. Chen,Chao Chen,G. Chen,H. S. Chen,H. Y. Chen,M. L. Chen,S. J. Chen,S. L. Chen,S. M. Chen,T. Chen, X. R. Chen,X. T. Chen,Y. B. Chen,Y. Q. Chen,Z. J. Chen,Z. Y. Chen,S. K. Choi,G. Cibinetto,F. Cossio,J. J. Cui,H. L. Dai,J. P. Dai,A. Dbeyssi,R. E. de Boer,D. Dedovich,C. Q. Deng,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,B. Ding,X. X. Ding, Y. Ding,Y. Ding,J. Dong, L. Y. Dong,M. Y. Dong,X. Dong,M. C. Du,S. X. Du,Z. H. Duan,P. Egorov,Y. H. Fan, J. Fang,J. Fang,S. S. Fang,W. X. Fang,Y. Fang,Y. Q. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Q. Feng,J. H. Feng,Y. T. Feng,M. Fritsch,C. D. Fu,J. L. Fu,Y. W. Fu,H. Gao,X. B. Gao,Y. N. Gao,Yang Gao,S. Garbolino,I. Garzia,L. Ge,P. T. Ge,Z. W. Ge,C. Geng,E. M. Gersabeck,A. Gilman,K. Goetzen,L. Gong,W. X. Gong,W. Gradl,S. Gramigna,M. Greco,M. H. Gu,Y. T. Gu,C. Y. Guan,Z. L. Guan,A. Q. Guo,L. B. Guo,M. J. Guo, R. P. Guo,Y. P. Guo,A. Guskov,J. Gutierrez,K. L. Han,T. T. Han,X. Q. Hao,F. A. Harris, K. K. He,K. L. He,F. H. Heinsius,C. H. Heinz,Y. K. Heng,C. Herold,T. Holtmann,P. C. Hong, G. Y. Hou,X. T. Hou,Y. R. Hou,Z. L. Hou, B. Y. Hu,H. M. Hu,J. F. Hu,S. L. Hu,T. Hu,Y. Hu,G. S. Huang, K. X. Huang,L. Q. Huang,X. T. Huang,Y. P. Huang,T. Hussain,F. Hölzken,N Hüsken,N. in der Wiesche,J. Jackson,S. Janchiv,J. H. Jeong,Q. Ji,Q. P. Ji,W. Ji, X. B. Ji,X. L. Ji,Y. Y. Ji,X. Q. Jia,Z. K. Jia,D. Jiang,H. B. Jiang,P. C. Jiang, S. S. Jiang,T. J. Jiang,X. S. Jiang,Y. Jiang, J. B. Jiao,J. K. Jiao,Z. Jiao,S. Jin,Y. Jin, M. Q. Jing,X. M. Jing,T. Johansson,S. Kabana,N. Kalantar-Nayestanaki, X. L. Kang,X. S. Kang,M. Kavatsyuk,B. C. Ke,V. Khachatryan,A. Khoukaz,R. Kiuchi,O. B. Kolcu,B. Kopf,M. Kuessner,X. Kui,N. Kumar,A. Kupsc,W. Kühn,J. J. Lane,P. Larin,L. Lavezzi,T. T. Lei,Z. H. Lei,M. Lellmann,T. Lenz, C. Li,C. Li, C. H. Li,Cheng Li, D. M. Li,F. Li,G. Li,H. B. Li,H. J. Li,H. N. Li,Hui Li,J. R. Li,J. S. Li,Ke Li,L. J Li,L. K. Li,Lei Li,M. H. Li,P. R. Li,Q. M. Li,Q. X. Li,R. Li,S. X. Li,T. Li,W. D. Li,W. G. Li,X. Li,X. H. Li,X. L. Li,X. Z. Li, Xiaoyu Li,Y. G. Li,Z. J. Li,Z. X. Li,C. Liang, H. Liang,H. Liang, Y. F. Liang,Y. T. Liang,G. R. Liao,L. Z. Liao,J. Libby,A. Limphirat,C. C. Lin,D. X. Lin,T. Lin, B. J. Liu,B. X. Liu,C. Liu,C. X. Liu, F. H. Liu,Fang Liu,Feng Liu, G. M. Liu,H. Liu,H. B. Liu,H. M. Liu,Huanhuan Liu,Huihui Liu,J. B. Liu,J. Y. Liu, K. Liu,K. Y. Liu,Ke Liu, L. Liu,L. C. Liu,Lu Liu,M. H. Liu,P. L. Liu,Q. Liu,S. B. Liu,T. Liu,W. K. Liu,W. M. Liu, X. Liu,X. Liu, Y. Liu,Y. Liu,Y. B. Liu, Z. A. Liu,Z. D. Liu,Z. Q. Liu,X. C. Lou, F. X. Lu, H. J. Lu,J. G. Lu,X. L. Lu,Y. Lu,Y. P. Lu,Z. H. Lu, C. L. Luo,M. X. Luo,T. Luo,X. L. Luo,X. R. Lyu,Y. F. Lyu,F. C. Ma,H. Ma, H. L. Ma,J. L. Ma,L. L. Ma, M. M. Ma,Q. M. Ma,R. Q. Ma,T. Ma, X. T. Ma,X. Y. Ma,Y. Ma,Y. M. Ma,F. E. Maas,M. Maggiora,S. Malde,Y. J. Mao,Z. P. Mao,S. Marcello,Z. X. Meng,J. G. Messchendorp,G. Mezzadri,H. Miao,T. J. Min,R. E. Mitchell,X. H. Mo,B. Moses,N. Yu. Muchnoi,J. Muskalla,Y. Nefedov,F. Nerling,L. S. Nie,I. B. Nikolaev,Z. Ning,S. Nisar,Q. L. Niu,W. D. Niu,Y. Niu,S. L. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Y. Pan,A. Pathak,P. Patteri,Y. P. Pei,M. Pelizaeus,H. P. Peng,Y. Y. Peng,K. Peters,J. L. Ping,R. G. Ping,S. Plura,V. Prasad,F. Z. Qi,H. Qi,H. R. Qi,M. Qi,T. Y. Qi,S. Qian,W. B. Qian,C. F. Qiao,X. K. Qiao,J. J. Qin, L. Q. Qin,L. Y. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,Z. H. Qu,C. F. Redmer,K. J. Ren,A. Rivetti,M. Rolo,G. Rong,Ch. Rosner,S. N. Ruan,N. Salone,A. Sarantsev,Y. Schelhaas,K. Schoenning,M. Scodeggio, K. Y. Shan,W. Shan,X. Y. Shan,Z. J Shang,J. F. Shangguan,L. G. Shao,M. Shao,C. P. Shen, H. F. Shen,W. H. Shen,X. Y. Shen,B. A. Shi,H. Shi,H. C. Shi, J. L. Shi,J. Y. Shi,Q. Q. Shi,S. Y. Shi, X. Shi, J. J. Song,T. Z. Song,W. M. Song,Y. J. Song,Y. X. Song,S. Sosio,S. Spataro,F. Stieler,Y. J. Su, G. B. Sun,G. X. Sun,H. Sun,H. K. Sun, J. F. Sun,K. Sun,L. Sun,S. S. Sun,T. Sun, W. Y. Sun,Y. Sun,Y. J. Sun,Y. Z. Sun,Z. Q. Sun,Z. T. Sun,C. J. Tang, G. Y. Tang,J. Tang,M. Tang,Y. A. Tang,L. Y. Tao,Q. T. Tao,M. Tat,J. X. Teng,V. Thoren,W. H. Tian,Y. Tian,Z. F. Tian,I. Uman,Y. Wan, S. J. Wang, B. Wang, B. L. Wang,Bo Wang, D. Y. Wang,F. Wang,H. J. Wang,J. J. Wang,J. P. Wang,K. Wang,L. L. Wang, M. Wang,Meng Wang,N. Y. Wang, S. Wang,S. Wang,T. Wang,T. J. Wang, W. Wang,W. Wang,W. P. Wang,X. Wang,X. F. Wang,X. J. Wang,X. L. Wang,X. N. Wang, Y. Wang,Y. D. Wang,Y. F. Wang,Y. L. Wang,Y. N. Wang,Y. Q. Wang,Yaqian Wang,Yi Wang,Z. Wang,Z. L. Wang,Z. Y. Wang,Ziyi Wang,D. H. Wei,F. Weidner,S. P. Wen,Y. R. Wen,U. Wiedner,G. Wilkinson,M. Wolke,L. Wollenberg,C. Wu, J. F. Wu, L. H. Wu,L. J. Wu,X. Wu,X. H. Wu,Y. Wu,Y. H. Wu,Y. J. Wu,Z. Wu,L. Xia,X. M. Xian,B. H. Xiang,T. Xiang,D. Xiao, G. Y. Xiao,S. Y. Xiao,Y. L. Xiao,Z. J. Xiao,C. Xie, X. H. Xie,Y. Xie,Y. G. Xie,Y. H. Xie,Z. P. Xie,T. Y. Xing, C. F. Xu,C. J. Xu,G. F. Xu,H. Y. Xu,M. Xu,Q. J. Xu,Q. N. Xu,W. Xu,W. L. Xu, X. P. Xu,Y. C. Xu,Z. P. Xu,Z. S. Xu,F. Yan,L. Yan, W. B. Yan,W. C. Yan,X. Q. Yan, H. J. Yang,H. L. Yang,H. X. Yang,Tao Yang,Y. Yang, Y. F. Yang,Y. X. Yang,Yifan Yang,Z. W. Yang,Z. P. Yao,M. Ye,M. H. Ye,J. H. Yin,Z. Y. You, B. X. Yu,C. X. Yu,G. Yu,J. S. Yu,T. Yu,X. D. Yu,Y. C. Yu, C. Z. Yuan,J. Yuan,L. Yuan,S. C. Yuan,Y. Yuan,Y. J. Yuan,Z. Y. Yuan,C. X. Yue,A. A. Zafar,F. R. Zeng,S. H. Zeng,X. Zeng,Y. Zeng,Y. J. Zeng, X. Y. Zhai,Y. C. Zhai,Y. H. Zhan, A. Q. Zhang, B. L. Zhang,B. X. Zhang, D. H. Zhang, G. Y. Zhang, H. Zhang,H. Zhang,H. C. Zhang,H. H. Zhang,H. H. Zhang,H. Q. Zhang,H. R. Zhang,H. Y. Zhang, J. Zhang,J. Zhang, J. J. Zhang,J. L. Zhang,J. Q. Zhang,J. S. Zhang,J. W. Zhang,J. X. Zhang,J. Y. Zhang,J. Z. Zhang,Jianyu Zhang,L. M. Zhang,Lei Zhang,P. Zhang,Q. Y. Zhang,R. Y Zhang,Shuihan Zhang,Shulei Zhang,X. D. Zhang,X. M. Zhang,X. Y. Zhang, Y. Zhang,Y. T. Zhang,Y. H. Zhang,Y. M. Zhang,Yan Zhang,Yao Zhang,Z. D. Zhang,Z. H. Zhang,Z. L. Zhang,Z. Y. Zhang,Z. Y. Zhang,Z. Z. Zhang,G. Zhao, J. Y. Zhao,J. Z. Zhao,Lei Zhao,Ling Zhao,M. G. Zhao,N. Zhao,R. P. Zhao,S. J. Zhao,Y. B. Zhao,Y. X. Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,B. M. Zheng, J. P. Zheng,W. J. Zheng,Y. H. Zheng,B. Zhong,X. Zhong,H. Zhou, J. Y. Zhou,L. P. Zhou,S. Zhou,X. Zhou, X. K. Zhou,X. R. Zhou,X. Y. Zhou,Y. Z. Zhou,J. Zhu,K. Zhu, K. J. Zhu,K. S. Zhu,L. Zhu,L. X. Zhu,S. H. Zhu,S. Q. Zhu,T. J. Zhu,W. D. Zhu,Y. C. Zhu,Z. A. Zhu,J. H. Zou,J. Zu

arxiv（2024）

引用 0|浏览28

暂无评分

摘要

Using (10.087±0.044)×10^9 J/ψ events collected with the BESIII detector at the BEPCII storage ring, the processes Λ p→Λ p and Λ̅p→Λ̅p are studied, where the Λ/Λ̅ baryons are produced in the process J/ψ→ΛΛ̅ and the protons are the hydrogen nuclei in the cooling oil of the beam pipe. Clear signals are observed for the two reactions. The cross sections in -0.9≤cosθ_Λ/Λ̅≤0.9 are measured to be σ(Λ p→Λ p)=(12.2±1.6_stat±1.1_sys) mb and σ(Λ̅ p→Λ̅ p)=(17.5±2.1_stat±1.6_sys) mb at the Λ/Λ̅ momentum of 1.074 GeV/c within a range of ±0.017 GeV/c, where the θ_Λ/Λ̅ are the scattering angles of the Λ/Λ̅ in the Λ p/Λ̅p rest frames. Furthermore, the differential cross sections of the two reactions are also measured, where there is a slight tendency of forward scattering for Λ p→Λ p, and a strong forward peak for Λ̅p→Λ̅p. We present an approach to extract the total cross sections by extrapolation. The study of Λ̅p→Λ̅p represents the first study of antihyperon-nucleon scattering, and these new measurements will serve as important inputs for the theoretical understanding of the (anti)hyperon-nucleon interaction.

查看译文

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要