Search for psi(4S) ->eta J/psi in B+- -> eta J/psi K+- and e+ e- -> eta J/psi$ processes
Search for psi(4S) ->eta J/psi in B+- -> eta J/psi K+- and e+ e- -> eta J/psi$ processes
复制标题
在 B - -> eta J/psi K - 和 e e- -> eta J/psi$ 过程中搜索 psi(4S) ->eta J/psi
DOI：
10.1088/1674-1137/40/1/013001
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发表时间：
2016
影响因子：
3.6
通讯作者：
Shen Cheng-ping
中科院分区：
文献类型：
--
作者：
Gao Xu-yang;Wang Xiao-long;Shen Cheng-ping
We search for thestate in $B^\pm \ra \eta J/\psi K^\pm$ and $e^+e^- \ra \eta J/\psi$ based on the Belle measurements with the assumed massMeV/and widthMeV. No significant signal is observed in themass spectra. The 90\% confidence level upper limit on the product branching fraction $\BR(B^\pm \ra \psi(4S)K^\pm)\BR(\psi(4S) \ra \eta J/\psi)<6.8\times 10^{-6}$ is obtained in $B^\pm \ra \eta J/\psi K^\pm$ decays. By assuming the partial width ofbeing 0.63 keV, the branching fraction limit $\BR(\psi(4S) \ra \eta J/\psi) < 1.3\%$ is obtained at the 90\% confidence level in $e^+e^- \ra \eta J/\psi$, which is consistent with the theoretical prediction.
