Charmonium results from BES

摘要：

Using～14×106 ψ(2S) and～58×106 J/ψ data collected at BES Ⅱ/BEPC, the branching fraction of ψ(2S) →Ω-(Ω) + is measured with about 5σ statistical significance. The ∧ electric dipole and , decay parameter are studied using the decay J/ψ→∧→ p π+π-. Using (1065±3)×106 ψ(2S) decays collected at BESⅢ/BEPCⅡ, we have obtained some interesting physics results. The branching fractions of χcJ →π0π0, ηη are measured with precision improved. The mass and width of he(11P1) state, together with the branching fractions of Br(ψ(2S)→π0hc) and Br(hc→rηc) are the first measurements. Surprisingly, the decays of χc1→φφ,ωω, and ωφ are firstly observed in BESⅢ data.

关键词： charmonium decays J/ψ χcJ ψ(2S) BES Ⅱ/BES Ⅲ experiment

作者: PING Rong-Gang

作者单位: Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China

会议类型: 国际会议

会议名称: 国际φ电子到ψ电子正负电子碰撞研讨会

会议地点: 北京

会议语种:英文

页码: 626-631

在线出版日期: 2009-10-13（万方平台首次上网日期，不代表论文的发表时间）