The upper limit of the e+e− partial width of X(3872)

分类： 物理学 >> 凝聚态:结构、力学和热性能 提交时间： 2017-03-26

C. Z Yuan X. H Mo P Wang

摘要： The e+e− decay partial width of the recently observed state, X(3872), is estimated using the ISR data collected Root s=4.03 GeV in e+e− annihilation experiment by BES at BEPC. It is found that Γe+e-Bπ+π-J/ψ＜10eV at 90% C.L. if the JPC of X(3872) is 1−−. Together with the potential models and other information, we conclude that X(3872) is very unlikely to be a vector state.

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