Measurement of the B-0 lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019-2021 Belle II data
M. Ablikim,M. N. Achasov,P. Adlarson,S. Ahmed,M. Albrecht,A. Amoroso,Q. An,X. H. Bai,Y. Bai,O. Bakina,R. Baldini Ferroli,I Balossino,Y. Ban,K. Begzsuren,J. Bennett,N. Berger,M. Bertani,D. Bettoni,F. Bianchi,J. Biernat,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,D. Y. Chen,G. Chen,H. S. Chen,M. L. Chen,S. J. Chen,X. R. Chen,Y. B. Chen,W. Cheng,G. Cibinetto,F. Cossio,X. F. Cui,H. L. Dai,J. P. Dai,X. C. Dai,A. Dbeyssi,R. B. de Boer,D. Dedovich,Z. Y. Deng,A. Denig,I Denysenko,M. Destefanis,F. De Mori,Y. Ding,C. Dong,J. Dong,L. Y. Dong,M. Y. 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. Fu,X. L. Gao,Y. Gao,Y. Gao,Y. G. 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,S. Han,T. T. Han,T. Z. Han,X. Q. Hao,F. A. Harris,K. L. He,F. H. Heinsius,T. Held,Y. K. Heng,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,N. Huesken,T. Hussain,W. Ikegami Andersson,W. Imoehl,M. Irshad,S. Jaeger,Q. Ji,Q. P. Ji,X. B. Ji,X. L. Ji,H. B. Jiang,X. S. Jiang,X. Y. 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,L. Koch,O. B. Kolcu,B. Kopf,M. Kuemmel,M. Kuessner,A. Kupsc,M. G. Kurth,W. Kuehn,J. J. Lane,J. S. Lange,P. Larin,L. Lavezzi,H. Leithoff,M. Lellmann,T. Lenz,C. Li,C. H. Li,Cheng Li,D. M. Li,F. Li,G. Li,H. B. Li,H. J. Li,J. L. Li,J. Q. Li,Ke Li,L. K. Li,Lei Li,P. L. Li,P. R. Li,W. D. Li,W. G. Li,X. H. Li,X. L. Li,Z. B. Li,Z. Y. Li,H. Liang,H. Liang,Y. F. Liang,Y. T. Liang,L. Z. Liao,J. Libby,C. X. Lin,B. Liu,B. J. Liu,C. X. Liu,D. Liu,D. Y. 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,Ke Liu,L. Liu,L. Y. Liu,Q. Liu,S. B. Liu,T. Liu,X. Liu,Y. B. Liu,Z. A. Liu,Zhiqing Liu,Y. F. Long,X. C. Lou,H. J. Lu,J. D. Lu,J. G. Lu,X. L. Lu,Y. Lu,Y. P. Lu,C. L. Luo,M. X. Luo,P. W. 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. N. Ma,X. X. Ma,X. Y. Ma,Y. M. 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,Y. J. 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,Y. Pan,Y. Pan,M. Papenbrock,A. Pathak,P. Patteri,M. Pelizaeus,H. P. Peng,K. Peters,J. Pettersson,J. L. Ping,R. G. Ping,A. Pitka,R. Poling,V Prasad,H. Qi,M. Qi,T. Y. Qi,S. Qian,C. F. Qiao,L. Q. Qin,X. P. Qin,X. S. Qin,Z. H. Qin,J. F. Qiu,S. Q. Qu,K. H. Rashid,K. Ravindran,C. F. Redmer,A. Rivetti,V Rodin,M. Rolo,G. Rong,Ch Rosner,M. Rump,A. Sarantsev,M. Savrie,Y. Schelhaas,C. Schnier,K. Schoenning,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,J. J. Song,Q. Q. Song,Y. X. Song,S. Sosio,S. Spataro,F. F. Sui,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. X. Tan,C. J. Tang,G. Y. Tang,V Thoren,B. Tsednee,I Uman,B. Wang,B. L. Wang,C. W. Wang,D. Y. Wang,H. P. Wang,K. Wang,L. L. Wang,M. Wang,M. Z. Wang,Meng Wang,W. P. Wang,X. Wang,X. F. Wang,X. L. Wang,Y. Wang,Y. Wang,Y. D. Wang,Y. F. Wang,Y. Q. Wang,Z. Wang,Z. Y. Wang,Ziyi Wang,Zongyuan Wang,T. Weber,D. H. Wei,P. Weidenkaff,F. Weidner,H. W. Wen,S. P. Wen,D. J. White,U. Wiedner,G. Wilkinson,M. Wolke,L. Wollenberg,J. F. Wu,L. H. Wu,L. J. Wu,Z. Wu,L. Xia,S. Y. Xiao,Y. J. Xiao,Z. J. Xiao,Y. G. Xie,Y. H. Xie,T. Y. Xing,X. A. Xiong,G. F. Xu,J. J. Xu,Q. J. Xu,W. Xu,X. P. Xu,L. Yan,W. B. Yan,W. C. Yan,H. J. Yang,H. X. Yang,L. Yang,R. X. Yang,S. L. Yang,Y. H. Yang,Y. X. Yang,Yifan Yang,Zhi 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,W. Yuan,X. Q. Yuan,Y. Yuan,C. X. Yue,A. Yuncu,A. A. Zafar,Y. Zeng,B. X. Zhang,Guangyi Zhang,H. H. Zhang,H. Y. Zhang,J. L. Zhang,J. Q. Zhang,J. W. Zhang,J. Y. Zhang,J. Z. Zhang,Jianyu Zhang,Jiawei Zhang,L. Zhang,Lei Zhang,S. Zhang,S. F. Zhang,T. J. Zhang,X. Y. Zhang,Y. Zhang,Y. H. Zhang,Y. T. Zhang,Yan Zhang,Yao Zhang,Yi Zhang,Z. H. 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,Z. G. Zhao,A. Zhemchugov,B. Zheng,J. P. Zheng,Y. 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,X. L. Zhu,Y. C. Zhu,Z. A. Zhu,B. S. Zou,J. H. Zou
arxiv（2023）
引用1|浏览29
暂无评分
摘要
We measure the B-0 lifetime and flavor-oscillation frequency using B-0 -> D(*)-x+ decays collected by the Belle II experiment in asymmetric-energy e+e- collisions produced by the SuperKEKB collider operating at the T(4S) resonance. We fit the decay-time distribution of signal decays, where the initial flavor is determined by identifying the flavor of the other B meson in the event. The results, based on 33000 signal decays reconstructed in a data sample corresponding to 190 fb(-1), are zB(0) = (1.499 +/- 0.013 +/- 0.008) ps, Amd = (0.516 +/- 0.008 +/- 0.005) ps(-1), where the first uncertainties are statistical and the second are systematic. These results are consistent with the world-average values.
