First Study of Antihyperon-Nucleon Scattering
Λ¯p→Λ¯p
and Measurement of
Λp→Λp
Cross Section
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Published:2024-06-04
Issue:23
Volume:132
Page:
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ISSN:0031-9007
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Container-title:Physical Review Letters
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language:en
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Short-container-title:Phys. Rev. Lett.
Author:
Ablikim M.1, Achasov M. N.2, Adlarson P.3, Afedulidis O.4, Ai X. C.5, Aliberti R.6, Amoroso A.78, An Q.910, Bai Y.11, Bakina O.12, Balossino I.13, Ban Y.14, Bao H.-R.15, Batozskaya V.116, Begzsuren K.17, Berger N.6, Berlowski M.16, Bertani M.18, Bettoni D.13, Bianchi F.78, Bianco E.78, Bortone A.78, Boyko I.12, Briere R. A.19, Brueggemann A.20, Cai H.21, Cai X.110, Calcaterra A.18, Cao G. F.115, Cao N.115, Cetin S. A.22, Chang J. F.110, Che G. R.23, Chelkov G.12, Chen C.23, Chen C. H.24, Chen Chao25, Chen G.1, Chen H. S.115, Chen H. Y.26, Chen M. L.11015, Chen S. J.27, Chen S. L.28, Chen S. M.29, Chen T.115, Chen X. R.3015, Chen X. T.115, Chen Y. B.110, Chen Y. Q.31, Chen Z. J.32, Chen Z. Y.115, Choi S. K.33, Cibinetto G.13, Cossio F.8, Cui J. J.34, Dai H. L.110, Dai J. P.35, Dbeyssi A.36, de Boer R. E.4, Dedovich D.12, Deng C. Q.37, Deng Z. Y.1, Denig A.6, Denysenko I.12, Destefanis M.78, De Mori F.78, Ding B.381, Ding X. X.14, Ding Y.31, Ding Y.39, Dong J.110, Dong L. Y.115, Dong M. Y.11015, Dong X.21, Du M. C.1, Du S. X.5, Duan Z. H.27, Egorov P.12, Fan Y. H.28, Fang J.110, Fang J.40, Fang S. S.115, Fang W. X.1, Fang Y.1, Fang Y. Q.110, Farinelli R.13, Fava L.418, Feldbauer F.4, Felici G.18, Feng C. Q.910, Feng J. H.40, Feng Y. T.910, Fritsch M.4, Fu C. D.1, Fu J. L.15, Fu Y. W.115, Gao H.15, Gao X. B.42, Gao Y. N.14, Gao Yang910, Garbolino S.8, Garzia I.1343, Ge L.5, Ge P. T.21, Ge Z. W.27, Geng C.40, Gersabeck E. M.44, Gilman A.45, Goetzen K.46, Gong L.39, Gong W. X.110, Gradl W.6, Gramigna S.1343, Greco M.78, Gu M. H.110, Gu Y. T.47, Guan C. Y.115, Guan Z. L.48, Guo A. Q.3015, Guo L. B.42, Guo M. J.34, Guo R. P.49, Guo Y. P.50, Guskov A.12, Gutierrez J.51, Han K. L.15, Han T. T.1, Hao X. Q.52, Harris F. A.53, He K. K.25, He K. L.115, Heinsius F. H.4, Heinz C. H.6, Heng Y. K.11015, Herold C.54, Holtmann T.4, Hong P. C.31, Hou G. Y.115, Hou X. T.115, Hou Y. R.15, Hou Z. L.1, Hu B. Y.40, Hu H. M.115, Hu J. F.55, Hu S. L.50, Hu T.11015, Hu Y.1, Huang G. S.910, Huang K. X.40, Huang L. Q.3015, Huang X. T.34, Huang Y. P.1, Hussain T.56, Hölzken F.4, Hüsken N.516, in der Wiesche N.20, Jackson J.51, Janchiv S.17, Jeong J. H.33, Ji Q.1, Ji Q. P.52, Ji W.115, Ji X. B.115, Ji X. L.110, Ji Y. Y.34, Jia X. Q.34, Jia Z. K.910, Jiang D.115, Jiang H. B.21, Jiang P. C.14, Jiang S. S.57, Jiang T. J.58, Jiang X. S.11015, Jiang Y.15, Jiao J. B.34, Jiao J. K.31, Jiao Z.59, Jin S.27, Jin Y.38, Jing M. Q.115, Jing X. M.15, Johansson T.3, Kabana S.60, Kalantar-Nayestanaki N.61, Kang X. L.24, Kang X. S.39, Kavatsyuk M.61, Ke B. C.5, Khachatryan V.51, Khoukaz A.20, Kiuchi R.1, Kolcu O. B.22, Kopf B.4, Kuessner M.4, Kui X.115, Kumar N.62, Kupsc A.163, Kühn W.63, Lane J. J.44, Larin P.36, Lavezzi L.78, Lei T. T.910, Lei Z. H.910, Lellmann M.6, Lenz T.6, Li C.64, Li C.23, Li C. H.57, Li Cheng910, Li D. M.5, Li F.110, Li G.1, Li H. B.115, Li H. J.52, Li H. N.55, Li Hui23, Li J. R.29, Li J. S.40, Li Ke1, Li L. J.115, Li L. K.1, Li Lei65, Li M. H.23, Li P. R.66, Li Q. M.115, Li Q. X.34, Li R.6730, Li S. X.50, Li T.34, Li W. D.115, Li W. G.1, Li X.115, Li X. H.910, Li X. L.34, Li X. Z.40, Li Xiaoyu115, Li Y. G.14, Li Z. J.40, Li Z. X.47, Liang C.27, Liang H.910, Liang H.115, Liang Y. F.68, Liang Y. T.3015, Liao G. R.69, Liao L. Z.34, Libby J.62, Limphirat A.54, Lin C. C.25, Lin D. X.3015, Lin T.1, Liu B. J.1, Liu B. X.21, Liu C.31, Liu C. X.1, Liu F. H.70, Liu Fang1, Liu Feng71, Liu G. M.55, Liu H.66, Liu H. B.47, Liu H. M.115, Liu Huanhuan1, Liu Huihui72, Liu J. B.910, Liu J. Y.115, Liu K.66, Liu K. Y.39, Liu Ke48, Liu L.910, Liu L. C.23, Liu Lu23, Liu M. H.50, Liu P. L.1, Liu Q.15, Liu S. B.910, Liu T.50, Liu W. K.23, Liu W. M.910, Liu X.57, Liu X.66, Liu Y.5, Liu Y.66, Liu Y. B.23, Liu Z. A.11015, Liu Z. D.24, Liu Z. Q.34, Lou X. C.11015, Lu F. X.40, Lu H. J.59, Lu J. G.110, Lu X. L.1, Lu Y.73, Lu Y. P.110, Lu Z. H.115, Luo C. L.42, Luo M. X.74, Luo T.50, Luo X. L.110, Lyu X. R.15, Lyu Y. F.23, Ma F. C.39, Ma H.35, Ma H. L.1, Ma J. L.115, Ma L. L.34, Ma M. M.115, Ma Q. M.1, Ma R. Q.115, Ma T.910, Ma X. T.115, Ma X. Y.110, Ma Y.14, Ma Y. M.30, Maas F. E.36, Maggiora M.78, Malde S.45, Mao Y. J.14, Mao Z. P.1, Marcello S.78, Meng Z. X.38, Messchendorp J. G.4661, Mezzadri G.13, Miao H.115, Min T. J.27, Mitchell R. E.51, Mo X. H.11015, Moses B.51, Muchnoi N. Yu.2, Muskalla J.6, Nefedov Y.12, Nerling F.36, Nie L. S.26, Nikolaev I. B.2, Ning Z.110, Nisar S.75, Niu Q. L.66, Niu W. D.25, Niu Y.34, Olsen S. L.15, Ouyang Q.11015, Pacetti S.7677, Pan X.25, Pan Y.11, Pathak A.31, Patteri P.18, Pei Y. P.910, Pelizaeus M.4, Peng H. P.910, Peng Y. Y.66, Peters K.46, Ping J. L.42, Ping R. G.115, Plura S.6, Prasad V.60, Qi F. Z.1, Qi H.910, Qi H. R.29, Qi M.27, Qi T. Y.50, Qian S.110, Qian W. B.15, Qiao C. F.15, Qiao X. K.5, Qin J. J.37, Qin L. Q.69, Qin L. Y.910, Qin X. S.34, Qin Z. H.110, Qiu J. F.1, Qu Z. H.37, Redmer C. F.6, Ren K. J.57, Rivetti A.8, Rolo M.8, Rong G.115, Rosner Ch.36, Ruan S. N.23, Salone N.16, Sarantsev A.12, Schelhaas Y.6, Schoenning K.3, Scodeggio M.13, Shan K. Y.50, Shan W.78, Shan X. Y.910, Shang Z. J.66, Shangguan J. F.25, Shao L. G.115, Shao M.910, Shen C. P.50, Shen H. F.179, Shen W. H.15, Shen X. Y.115, Shi B. A.15, Shi H.910, Shi H. C.910, Shi J. L.50, Shi J. Y.1, Shi Q. Q.25, Shi S. Y.37, Shi X.110, Song J. J.52, Song T. Z.40, Song W. M.311, Song Y. J.50, Song Y. X.14, Sosio S.78, Spataro S.78, Stieler F.6, Su Y. J.15, Sun G. B.21, Sun G. X.1, Sun H.15, Sun H. K.1, Sun J. F.52, Sun K.29, Sun L.21, Sun S. S.115, Sun T.80, Sun W. Y.31, Sun Y.24, Sun Y. J.910, Sun Y. Z.1, Sun Z. Q.115, Sun Z. T.34, Tang C. J.68, Tang G. Y.1, Tang J.40, Tang M.910, Tang Y. A.21, Tao L. Y.37, Tao Q. T.32, Tat M.45, Teng J. X.910, Thoren V.3, Tian W. H.40, Tian Y.3015, Tian Z. F.21, Uman I.81, Wan Y.25, Wang S. J.34, Wang B.1, Wang B. L.15, Wang Bo910, Wang D. Y.14, Wang F.37, Wang H. J.66, Wang J. J.21, Wang J. P.34, Wang K.110, Wang L. L.1, Wang M.34, Wang Meng115, Wang N. Y.15, Wang S.66, Wang S.50, Wang T.50, Wang T. J.23, Wang W.40, Wang W.37, Wang W. P.69, Wang X.14, Wang X. F.66, Wang X. J.57, Wang X. L.50, Wang X. N.1, Wang Y.29, Wang Y. D.28, Wang Y. F.11015, Wang Y. L.52, Wang Y. N.28, Wang Y. Q.1, Wang Yaqian67, Wang Yi29, Wang Z.110, Wang Z. L.37, Wang Z. Y.115, Wang Ziyi15, Wei D. H.69, Weidner F.20, Wen S. P.1, Wen Y. R.57, Wiedner U.4, Wilkinson G.45, Wolke M.3, Wollenberg L.4, Wu C.57, Wu J. F.179, Wu L. H.1, Wu L. J.115, Wu X.50, Wu X. H.31, Wu Y.910, Wu Y. H.25, Wu Y. J.30, Wu Z.110, Xia L.910, Xian X. M.57, Xiang B. H.115, Xiang T.14, Xiao D.66, Xiao G. Y.27, Xiao S. Y.1, Xiao Y. L.50, Xiao Z. J.42, Xie C.27, Xie X. H.14, Xie Y.34, Xie Y. G.110, Xie Y. H.71, Xie Z. P.910, Xing T. Y.115, Xu C. F.115, Xu C. J.40, Xu G. F.1, Xu H. Y.38, Xu M.910, Xu Q. J.58, Xu Q. N.82, Xu W.1, Xu W. L.38, Xu X. P.25, Xu Y. C.83, Xu Z. P.27, Xu Z. S.15, Yan F.50, Yan L.50, Yan W. B.910, Yan W. C.5, Yan X. Q.1, Yang H. J.80, Yang H. L.31, Yang H. X.1, Yang Tao1, Yang Y.50, Yang Y. F.23, Yang Y. X.115, Yang Yifan115, Yang Z. W.66, Yao Z. P.34, Ye M.110, Ye M. H.79, Yin J. H.1, You Z. Y.40, Yu B. X.11015, Yu C. X.23, Yu G.115, Yu J. S.32, Yu T.37, Yu X. D.14, Yu Y. C.5, Yuan C. Z.115, Yuan J.31, Yuan L.84, Yuan S. C.1, Yuan Y.115, Yuan Y. J.28, Yuan Z. Y.40, Yue C. X.57, Zafar A. A.56, Zeng F. R.34, Zeng S. H.37, Zeng X.50, Zeng Y.32, Zeng Y. J.40, Zhai X. Y.31, Zhai Y. C.34, Zhan Y. H.40, Zhang A. Q.115, Zhang B. L.115, Zhang B. X.1, Zhang D. H.23, Zhang G. Y.52, Zhang H.910, Zhang H.5, Zhang H. C.11015, Zhang H. H.40, Zhang H. H.31, Zhang H. Q.11015, Zhang H. R.910, Zhang H. Y.110, Zhang J.40, Zhang J.5, Zhang J. J.85, Zhang J. L.26, Zhang J. Q.42, Zhang J. S.50, Zhang J. W.11015, Zhang J. X.66, Zhang J. Y.1, Zhang J. Z.115, Zhang Jianyu15, Zhang L. M.29, Zhang Lei27, Zhang P.115, Zhang Q. Y.31, Zhang R. Y.66, Zhang Shuihan115, Zhang Shulei32, Zhang X. D.28, Zhang X. M.1, Zhang X. Y.34, Zhang Y.37, Zhang Y. T.5, Zhang Y. H.110, Zhang Y. M.57, Zhang Yan910, Zhang Yao1, Zhang Z. D.1, Zhang Z. H.1, Zhang Z. L.31, Zhang Z. Y.23, Zhang Z. Y.21, Zhang Z. Z.28, Zhao G.1, Zhao J. Y.115, Zhao J. Z.110, Zhao Lei910, Zhao Ling1, Zhao M. G.23, Zhao N.35, Zhao R. P.15, Zhao S. J.5, Zhao Y. B.110, Zhao Y. X.3015, Zhao Z. G.910, Zhemchugov A.12, Zheng B.37, Zheng B. M.31, Zheng J. P.110, Zheng W. J.115, Zheng Y. H.15, Zhong B.42, Zhong X.40, Zhou H.34, Zhou J. Y.31, Zhou L. P.115, Zhou S.71, Zhou X.21, Zhou X. K.71, Zhou X. R.910, Zhou X. Y.57, Zhou Y. Z.50, Zhu J.23, Zhu K.1, Zhu K. J.11015, Zhu K. S.50, Zhu L.31, Zhu L. X.15, Zhu S. H.86, Zhu S. Q.27, Zhu T. J.50, Zhu W. D.42, Zhu Y. C.910, Zhu Z. A.115, Zou J. H.1, Zu J.910,
Affiliation:
1. Institute of High Energy Physics 2. Budker Institute of Nuclear Physics SB RAS (BINP) 3. Uppsala University 4. Bochum Ruhr-University 5. Zhengzhou University 6. Johannes Gutenberg University of Mainz 7. University of Turin 8. INFN 9. University of Science and Technology of China 10. State Key Laboratory of Particle Detection and Electronics 11. Southeast University 12. Joint Institute for Nuclear Research 13. INFN Sezione di Ferrara 14. Peking University 15. University of Chinese Academy of Sciences 16. National Centre for Nuclear Research 17. Institute of Physics and Technology 18. INFN Laboratori Nazionali di Frascati 19. Carnegie Mellon University 20. University of Muenster 21. Wuhan University 22. Istinye University 23. Nankai University 24. China University of Geosciences 25. Soochow University 26. Henan University 27. Nanjing University 28. North China Electric Power University 29. Tsinghua University 30. Institute of Modern Physics 31. Jilin University 32. Hunan University 33. Chung-Ang University 34. Shandong University 35. Yunnan University 36. Helmholtz Institute Mainz 37. University of South China 38. University of Jinan 39. Liaoning University 40. Sun Yat-Sen University 41. University of Eastern Piedmont 42. Nanjing Normal University 43. University of Ferrara 44. University of Manchester 45. University of Oxford 46. GSI Helmholtzcentre for Heavy Ion Research GmbH 47. Guangxi University 48. Henan University of Technology 49. Shandong Normal University 50. Fudan University 51. Indiana University 52. Henan Normal University 53. University of Hawaii 54. Suranaree University of Technology 55. South China Normal University 56. University of the Punjab 57. Liaoning Normal University 58. Hangzhou Normal University 59. Huangshan College 60. Universidad de Tarapacá 61. University of Groningen 62. Indian Institute of Technology 63. Justus-Liebig-Universitaet Giessen 64. Qufu Normal University 65. Renmin University of China 66. Lanzhou University 67. Hebei University 68. Sichuan University 69. Guangxi Normal University 70. Shanxi University 71. Central China Normal University 72. Henan University of Science and Technology 73. Central South University 74. Zhejiang University 75. COMSATS University Islamabad 76. INFN Sezione di Perugia 77. University of Perugia 78. Hunan Normal University 79. China Center of Advanced Science and Technology 80. Shanghai Jiao Tong University 81. Near East University 82. Inner Mongolia University 83. Yantai University 84. Beihang University 85. Shanxi Normal University 86. University of Science and Technology Liaoning
Abstract
Using (10.087±0.044)×109 J/ψ events collected with the BESIII detector at the BEPCII storage ring, the processes Λp→Λp and Λ¯p→Λ¯p are studied, where the Λ/Λ¯ baryons are produced in the process J/ψ→ΛΛ¯ 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≤cosθΛ/Λ¯≤0.9 are measured to be σ(Λp→Λp)=(12.2±1.6stat±1.1syst) and σ(Λ¯p→Λ¯p)=(17.5±2.1stat±1.6syst) mb at the Λ/Λ¯ momentum of 1.074 GeV/c within a range of ±0.017 GeV/c, where the θΛ/Λ¯ are the scattering angles of the Λ/Λ¯ in the Λp/Λ¯p rest frames. Furthermore, the differential cross sections of the two reactions are also measured, where there is a slight tendency of forward scattering for Λp→Λp, and a strong forward peak for Λ¯p→Λ¯p. We present an approach to extract the total elastic cross sections by extrapolation. The study of Λ¯p→Λ¯p 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.
Published by the American Physical Society
2024
Funder
National Key Research and Development Program of China National Natural Science Foundation of China Natural Science Foundation of Henan Province Chinese Academy of Sciences CAS Center for Excellence in Particle Physics Key Research Program of Frontier Science, Chinese Academy of Sciences Horizon 2020 Framework Programme H2020 Marie Sk?odowska-Curie Actions Deutsche Forschungsgemeinschaft Istituto Nazionale di Fisica Nucleare Sezione di Padova Ministry of Development of Turkey National Research Foundation of Korea Narodowe Centrum Nauki Vetenskapsrådet U.S. Department of Energy 100 Talents Program of CAS Collaborative Research Center National Science and Technology fund of Mongolia National Science Research and Innovation Fund
Publisher
American Physical Society (APS)
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