Direct measurements of the non-DD¯ cross section σψ(3770)→non-DD¯ at Ecm=3.773 GeV and the branching fraction for ψ(3770)→non-DD¯

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, K. He,M. He, Y. Heng,J. Hou,H. Hu,J. Hu, T. Hu, G. Huang,X. Huang,X. Ji, X. Jiang,J. Jiao,D. Jin,S. 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,R. Ping,N. Qi,H. Qin, J. Qiu,Z. Ren,G. Rong,X. Ruan,L. Shan,L. Shang,D. Shen,X. Shen,H. Sheng,H. Sun,S. Sun,Y. Sun,Z. Sun, X. Tang,G. Tong,D. Wang,L. Wang,M. Wang, P. Wang,W. Wang,Y. Wang, Z. Wang, Zheng Wang,C. Wei, D. Wei, 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, H. Zheng, J. Zheng,Z. Zheng, L. Zhou, K. Zhu,Q. Zhu, Y. Zhu,Z. Zhu,B. Zhuang,X. Zhuang,B. Zou

PHYSICAL REVIEW D（2007）

引用 61|浏览104

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摘要

By analyzing the data collected at the center-of-mass energy E-cm=3.773 GeV and below the D (D) over bar meson pair production threshold with the BES-II detector at the BEPC Collider, we directly measured the observed non-D (D) over bar cross section of psi(3770) decay to be sigma(obs)(psi(3770)-> non-D (D) over bar)=(0.95 +/- 0.35 +/- 0.29) nb at E-cm=3.773 GeV, and the branching fraction BF[psi(3770)-> non-D (D) over bar]=(13.4 +/- 5.0 +/- 3.6)% for inclusive non-D (D) over bar decay of psi(3770). We also determined the cross section for D (D) over bar meson pair production to be sigma(obs)(D (D) over bar)=(6.12 +/- 0.37 +/- 0.23) nb at E-cm=3.773 GeV.

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