Search For The Invisible Decay Of J/Psi In Psi(2s) -> Pi(+)Pi(-)J/Psi

M. Ablikim,J. Bai, Y. Ban, X. Cai,H. Chen,J. Chen,Jin Chen,Y. Chen,Y. Chu,Y. Dai,L. Diao,Z. Deng,Q. Dong,S. Du, J. Fang,S. Fang, C. Fu,C. Gao, Y. Gao,S. Gu, Y. Gu, Y. Guo,Z. Guo,F. Harris, K. He,M. He, Y. Heng,J. Hou,H. Hu,J. Hu,T. Hu,X. Huang,X. Ji,X. Jiang,J. Jiao,D. Jin,S. Jin,Y. Jin,Y. Lai, G. Li, H. Li,J. Li,R. Li,S. Li,W. Li,X. Li, Y. Liang,H. Liao,B. Liu,C. Liu, F. Liu, Fang Liu,H. Liu,J. Liu,Jian Liu, Q. Liu,R. Liu,Z. Liu,Y. Lou,F. Lu,G. Lu,J. Lu,C. Luo,F. Ma,H. Ma,L. Ma,Q. Ma,Z. Mao, X. Mo, J. Nie,S. Olsen,R. Ping,N. Qi,H. Qin, J. Qiu,Z. Ren,G. Rong,X. Ruan,L. Shan,L. Shang,C. Shen,D. Shen,X. Shen, H. Sheng,H. Sun,S. Sun,Y. Sun,Z. Sun, X. Tang,G. Tong, G. Varner,D. Wang,L. Wang,M. Wang,P. Wang,Y. Wang,Z. Wang,Zheng Wang,C. Wei,D. Wei,U. Wiedner, Y. Weng,N. Wu,X. Xia,X. Xie,G. Xu,X. Xu, Y. Xu, M. Yan,H. Yang,Y. Yang,M. Ye,Y. Ye, G. Yu,C. Yuan,Y. Yuan,S. Zang, Y. Zeng,B. Zhang, C. Zhang,D. Zhang, H. Zhang, J. Zhang,S. Zhang, X. Zhang,Yiyun Zhang,Z. Zhang,D. Zhao,J. Zhao,M. Zhao,P. Zhao,W. Zhao,Z. Zhao, H. Zheng, J. Zheng,Z. Zheng, L. Zhou, K. Zhu,Q. Zhu, Y. Zhu,Z. Zhu,B. Zhuang,X. Zhuang,B. Zou

PHYSICAL REVIEW LETTERS（2008）

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摘要

Using psi(2S) --> pi(+)pi(-)J/psi events in a sample of 14.0 x 10(6) psi(2S) decays collected with the BES-II detector, a search for the decay of the J/psi to invisible final states is performed. No signal is found, and an upper limit at the 90% confidence level is determined to be 1.2 x 10(-2) for the ratio B(J/psi-->invisible)/B(J/psi-->mu(+)mu(-)). This is the first search for J/psi decays to invisible final states.

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