First evidence of ψ(2S) → Ω -Ω̄+

Medina Ablikim,J. Z. Bai, Y. Bai,Yang Ban,X. Cai,Hongfang Chen,Hesheng Chen,Jin Chen,Jiangchuan Chen,Yuanbo Chen,Y. P. Chu,Y. S. Dai,Z. Y. Deng,S. X. Du,Jian Fang,Chedong Fu,Y. Gao,Y. T. Gu,Z. J. Guo,Frederick A. Harris,Kanglin He,Mao He,Yuekun Heng,H. M. Hu,Tahir Hussain,Tao Hu,G. S. Huang,Xingtao Huang,Yanping Huang,Talib A. Hussain,Xiaobini Ji,X. S. Jiang,J. B. Jiao,Dan Jin,Shan Jin,Gang Li,Haibo Li, Jin Li,Li Li,Rui Li,Weidong Li,Wugui Li,Xianlei Li,Xiaonan Li,Xueqian Li,Yan Liang,Ben Liu,C. X. Liu, Fang Liu, Feng Liu,Hongbang Liu,HuaiMin Liu, Jie Liu, Q. Liu,Rongguang Liu,Zhenan Liu,Fangjun Lu,G. R. Lu,J. G. Lu,X. L. Luo,Fencai Ma,H. L. Ma,QinMei Ma,M. Q A Malik,Z. P. Mao,Xiaohu Mo,J. Nie,Stephen Lars Olsen,Ronggang Ping,J. F. Qiu,Gang Rong,Xiangdong Ruan,L. Y. Shan,Lei Shang,C. P. Shen,X. Y. Shen,Huayi Sheng,S. S. Sun,Yongzhaotcbs Sun,Z. J. Sun,X. W. Tang,J. P. Tian,Gary S. Varner,X. Wan, Lan Wang, Liang Wang,P. L. Wang,Ping Wang,Yifang Wang,Zhigang Wang,Zhe Wang,C. L. Wei,D. H. Wei,N. Wu,Gang Xu,X. P. Xu,Yongwei Xu,M. L. Yan,Hai Yang,M. Yang,Yongxu Yang,M. H. Ye,Y. X. Ye,C. X. Yu,Changzheng Yuan,Yo Yuan,Yun Zeng,B. X. Zhang,B. Y. Zhang,C. C. Zhang,D. H. Zhang,Hong Zhang,Hongyu Zhang,Jiawen Zhang,Jianyong Zhang,Xueyao Zhang,Yan Zhang,Ziping Zhang,J. W. Zhao,M. G. Zhao,P. P. Zhao,Z. G. Zhao,B. Zheng,H. Q. Zheng,Jianping Zheng,Z. P. Zheng,B. Zhong,Lin Zhou, K. J. Zhu,Q. M. Zhu,XingWang Zhu,Yingshun Zhu,Zian Zhu,Bingsong Zou

中国物理C（2012）

引用 32|浏览50

暂无评分

摘要

The decay psi(2S) -> Omega(-)(Omega) over bar (+) is analyzed using 14 x 10(6) psi(2S) events recorded by the Beijing Spectrometer II (BES II) at the Beijing Electron Positron Collider (BEPC). Based upon events with no missing charged tracks and a satisfactory four-constraint kinematic fit, we determine the upper limit for the branching fraction of psi(2S) -> Omega(-)(Omega) over bar (+) to be 1.5 x 10(-4) at a 90% confidence level. By including events with one missing charged track, we are able to report the first evidence of an Omega(-)(Omega) over bar (+) signal with a statistical significance of 3.1 sigma. The branching fraction of psi(2S) -> Omega(-)(Omega) over bar (+) is determined to be (4.80 +/- 1.56(stat)+/- 1.30(sys)) x 10(-5).

查看译文

关键词

upper limit,first evidence,significance level,branching fraction

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