Search for - Baryon-Number-Violating Oscillations in the Decay J/ pK - plus c.c.
M. Ablikim,M. N. Achasov,P. Adlarson,S. Ahmed,M. Albrecht,R. Aliberti,A. Amoroso,Q. An,Y. Bai,O. Bakina,R. Baldini Ferroli,I. Balossino,Y. Ban,K. Begzsuren,N. Berger,M. Bertani,D. Bettoni,F. Bianchi,J. Bloms,A. Bortone,I. Boyko,R. A. Briere,H. Cai,X. Cai,A. Calcaterra,G. F. Cao,N. Cao,S. A. Cetin,J. F. Chang,W. L. Chang,G. Chelkov,G. Chen,H. S. Chen,M. L. Chen,S. J. Chen,X. R. Chen,Y. B. Chen,Z. J. Chen,W. S. Cheng,G. Cibinetto,F. Cossio,H. L. Dai,J. P. Dai,X. C. Dai,A. Dbeyssi,R. E. de Boer,D. Dedovich,Z. Y. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,Y. Ding,J. Dong,L. Y. Dong,M. Y. Dong,X. Dong,S. X. Du,J. Fang,S. S. Fang,Y. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Q. Feng,M. Fritsch,C. D. Fu,Y. N. Gao,Ya Gao,Yang Gao,I. Garzia,E. M. Gersabeck,A. Gilman,K. Goetzen,L. Gong,W. X. Gong,W. Gradl,M. Greco,L. M. Gu,M. H. Gu,S. Gu,Y. T. Gu,C. Y. Guan,A. Q. Guo,L. B. Guo,R. P. Guo,Y. P. Guo,A. Guskov,T. T. Han,X. Q. Hao,F. A. Harris,K. L. He,F. H. H. Heinsius,C. H. Heinz,Y. K. Heng,C. Herold,M. Himmelreich,T. Holtmann,Y. R. Hou,Z. L. Hou,H. M. Hu,J. F. Hu,T. Hu,Y. Hu,G. S. Huang,L. Q. Huang,X. T. Huang,Y. P. Huang,T. Hussain,W. Imoehl,M. Irshad,S. Jaeger,S. Janchiv,Q. Ji,Q. P. Ji,X. B. Ji,X. L. Ji,X. S. Jiang,J. B. Jiao,Z. Jiao,S. Jin,Y. Jin,T. Johansson,N. Kalantar-Nayestanaki,X. S. Kang,R. Kappert,M. Kavatsyuk,B. C. Ke,I. K. Keshk,A. Khoukaz,P. Kiese,R. Kiuchi,R. Kliemt,O. B. Kolcu,B. Kopf,M. Kuemmel,M. K. Kuessner,A. Kupsc,M. G. Kurth,W. Kuehn,J. J. Lane,P. Larin,A. Lavania,L. Lavezzi,Z. H. Lei,H. Leithoff,M. Lellmann,T. Lenz,C. Li,C. H. Li,Cheng Li,D. M. Li,F. Li,G. Li,H. Li,H. B. Li,H. J. Li,J. Q. Li,J. W. Li,Ke Li,L. K. Li,Lei Li,P. L. Li,P. R. Li,S. Y. Li,W. D. Li,W. G. Li,X. H. Li,X. L. Li,Z. Y. Li,H. Liang,Y. F. Liang,Y. T. Liang,G. R. Liao,L. Z. Liao,J. Libby,A. Limphirat,B. J. Liu,C. X. Liu,D. Liu,F. H. Liu,Fang Liu,Feng Liu,H. B. Liu,H. M. Liu,Huanhuan Liu,Huihui Liu,J. B. Liu,J. Y. Liu,K. Liu,K. Y. Liu,L. Liu,M. H. Liu,Q. Liu,S. B. Liu,Shuai Liu,T. Liu,W. M. Liu,X. Liu,Y. B. Liu,Z. A. Liu,Z. Q. Liu,X. C. Luo,F. X. Lu,H. J. Lu,J. D. Lu,J. G. Lu,X. L. Lu,Y. Lu,Y. P. Lu,C. L. Luo,M. X. Luo,T. Luo,X. L. Luo,S. Lusso,X. R. Lyu,F. C. Ma,H. L. Ma,L. L. Ma,M. M. Ma,Q. M. Ma,R. Q. Ma,R. T. Ma,X. X. Ma,X. Y. Ma,F. E. Maas,M. Maggiora,S. Maldaner,S. Malde,Q. A. Malik,A. Mangoni,Y. J. Mao,Z. P. Mao,S. Marcello,Z. X. Meng,J. G. Messchendorp,G. Mezzadri,T. J. Min,R. E. Mitchell,X. H. Mo,N. Yu. Muchnoi,H. Muramatsu,S. Nakhoul,Y. Nefedov,F. Nerling,I. B. Nikolaev,Z. Ning,S. Nisar,S. L. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Y. Pan,A. Pathak,P. Patteri,M. Pelizaeus,H. P. Peng,K. Peters,J. L. Ping,R. G. Ping,A. Pitka,R. Poling,V. Prasad,H. Qi,H. R. Qi,M. Qi,T. Y. Qi,S. Qian,W. B. Qian,C. F. Qiao,L. Q. Qin,X. P. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,S. Q. Qu,K. Ravindran,C. F. Redmer,A. Rivetti,V. Rodin,M. Rolo,G. Rong,Ch. Rosner,A. Sarantsev,Y. Schelhaas,C. Schnier,K. Schoenning,M. Scodeggio,D. C. Shan,W. Shan,X. Y. Shan,M. Shao,C. P. Shen,P. X. Shen,X. Y. Shen,H. C. Shi,R. S. Shi,X. Shi,X. D. Shi,W. M. Song,Y. X. Song,S. Sosio,S. Spataro,K. X. Su,G. X. Sun,J. F. Sun,L. Sun,S. S. Sun,T. Sun,W. Y. Sun,Y. J. Sun,Y. K. Sun,Y. Z. Sun,Z. T. Sun,Y. H. Tan,Y. X. Tan,C. J. Tang,G. Y. Tang,J. Tang,J. X. Teng,V. Thoren,I. Uman,B. Wang,B. L. Wang,C. W. Wang,D. Y. Wang,H. P. Wang,K. Wang,L. L. Wang,M. Wang,Meng Wang,W. H. Wang,W. P. Wang,X. Wang,X. F. Wang,X. L. Wang,Y. Wang,Y. D. Wang,Y. F. Wang,Y. Q. Wang,Z. Wang,Z. Y. Wang,Ziyi Wang,Zongyuan Wang,D. H. Wei,P. Weidenkaff,F. Weidner,S. P. Wen,D. J. White,U. W. Wiedner,G. Wilkinson,M. Wolke,L. Wollenberg,J. F. Wu,L. H. Wu,L. J. Wu,X. Wu,Z. Wu,L. Xia,H. Xiao,S. Y. Xiao,Z. J. Xiao,X. H. Xie,Y. G. Xie,Y. H. Xie,T. Y. Xing,G. F. Xu,J. J. Xu,Q. J. Xu,W. Xu,X. P. Xu,Y. C. Xu,F. Yan,L. Yan,W. B. Yan,W. C. Yan,Xu Yan,H. J. Yang,H. X. Yang,L. Yang,S. L. Yang,Y. H. Yang,Yifan Yang,M. Ye,M. H. Ye,J. H. Yin,Z. Y. You,B. X. Yu,C. X. Yu,G. Yu,J. S. Yu,T. Yu,C. Z. Yuan,L. Yuan,Y. Yuan,Y. Yuan,Z. Y. Yuan,C. X. Yue,A. A. Zafar,Y. Zeng,B. X. Zhang,G. Y. Zhang,H. Zhang,H. H. Zhang,H. Y. Zhang,J. J. Zhang,J. Q. Zhang,J. W. Zhao,J. Y. Zhang,J. Z. Zhang,Jianyu Zhang,Jiawei Zhang,Lei Zhang,S. F. Zhang,X. D. Zhang,X. Y. Zhang,Y. Zhang,Y. T. Zhang,Y. H. Zhang,Yan Zhang,Yao Zhang,Z. Y. Zhang,G. Zhao,J. Zhao,J. Y. Zhao,J. Z. Zhao,Lei Zhao,Ling Zhao,M. G. Zhao,Q. Zhao,S. J. Zhao,Y. B. Zhao,Y. X. Zhao,Z. G. Zhao,A. Zhemchugov,B. Zheng,J. P. Zheng,Y. H. Zheng,B. Zhong,C. Zhong,L. P. Zhou,Q. Zhou,X. Zhou,X. K. Zhou,X. R. Zhou,A. N. Zhu,J. Zhu,K. Zhu,K. J. Zhu,S. H. Zhu,W. J. Zhu,Y. C. Zhu,Z. A. Zhu,B. S. Zou,J. H. Zou
PHYSICAL REVIEW LETTERS（2023）
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摘要
We report on the first search for Lambda -Lambda oscillations in the decay J=psi -> pK- Lambda & thorn; c:c: by analyzing 1.31 x 10(9) J=psi events accumulated with the BESIII detector at the BEPCII collider. The J=psi events are produced using e(+) e(-) collisions at a center of mass energy root s= 3.097 GeV. No evidence for hyperon oscillations is observed. The upper limit for the oscillation rate of Lambda to Lambda hyperons is determined to be P(Lambda)=[B(J/psi -> pK(-)Lambda + c:c.)/B(J/psi -> pK(- )Lambda & thorn; c:c.)] < 4.4 x 10(-6) corresponding to an oscillation parameter delta m(Lambda Lambda ) of less than 3.8 x 10(-18 )GeV at the 90% confidence level.
