Search for $\psi (4S)\to \eta J/\psi$ in $B^\pm \ra ηJ/ψK^\pm$ and $e^{+}{e}^{-}\to \eta J/\psi$ processes

Abstract

We search for the $\psi (4S)$ state in $B^\pm \ra ηJ/ψK^\pm$ and $e^+e^- \ra ηJ/ψ$ based on the Belle measurements with the assumed mass $M=(4230\pm 8)$ MeV/$c^2$ and width $\Gamma =(38\pm 12)$ MeV. No significant signal is observed in the $\eta J/\psi$ mass spectra. The 90\% confidence level upper limit on the product branching fraction $\BR(B^\pm \ra ψ(4S)K^\pm)\BR(ψ(4S) \ra ηJ/ψ)<6.8\times 10^{-6}$ is obtained in $B^\pm \ra ηJ/ψK^\pm$ decays. By assuming the partial width of $\psi (4S)\to e^{+}{e}^{-}$ being 0.63 keV, the branching fraction limit $\BR(ψ(4S) \ra ηJ/ψ) < 1.3\%$ is obtained at the 90\% confidence level in $e^+e^- \ra ηJ/ψ$, which is consistent with the theoretical prediction.

arXiv comment4 pages, 2 figures

References in corpus (13)

• Observation of a New Narrow Charmonium State in Exclusive B+-->K+ pi+pi- J/psi Decays
• Observation of a narrow charmonium-like state in exclusive B+ -> K+ pi+pi- J/psi decays
• Observation of a Broad Structure in the ${\pi }^{+}{\pi }^{-}J/\psi$ Mass Spectrum around 4.26 GeV/$c^2$
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• Study of $e^{+}{e}^{-}\to \omega {\chi }_{cJ}$ at center-of-mass energies from 4.21 to 4.42 GeV
• Observation of ψ(4040) and ψ(4160) decay into ηJ/ψ
• Prediction of a missing higher charmonium around 4.26 GeV in $J/\psi$ family
• Observation of $e^{+}{e}^{-}\to {\chi }_{c0}\omega$ and missing higher charmonium $\psi (4S)$
• A note on the newly observed Y(4220) resonance
• ${\chi }_{c0}\omega$ production in $e^{+}{e}^{-}$ annihilation through $\psi (4160)$

Cited by in corpus (1)

• Search for missing $\psi (4S)$ in the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (2S)$ process