BES和CLEOc强子谱和粲偶素衰变研究(英文)

Hadron Spectroscopy and Charmonium Decays from BES and CLEOc

回顾了近期BES和CLEOc利用正负电子对撞机采集的J／ψ,ψ’和ψ”数据得到的强子谱与粲偶素衰变方面的部分研究结果．重点分析了对于轻标量粒子的实验研究,包括利用J／ψ的辐射衰变和强衰变,ψ’的强衰变和 Xc的强衰变得到的结果,并对有关粒子的性质进行了评述,对用以获得这些信息的实验方法作了评论,提出了改进的建议;还重点总结了矢量粲偶素粒子衰变“ρπ疑难”相关的实验和理论研究成果,并对进一步的实验和理论研究提出了建议．这些结果对于理解量子色动力学在低能区的应用有很大帮助．

Recent results from BES and CLEOc experiments on hadron spectroscopy and charmonium decays using J/ψ, ψ＇ and ψ″ data samples collected in e^＋e^- annihilation are reviewed, including the study of the scalar particles in J/ψ radiative and hadronic decays, as well as in ψ′ and xco hadronic decays, and the study of the ＂ρπ puzzle＂ in J/ψ, ψ′, and ψ″ decays. The new results on the light scalars and the new information on the hadronic decays of the ortho-charmonium states shed light on the understanding of QCD.