A novel explanation of charmonium-like structure in $e^{+}{e}^{-}\to \psi (2S){\pi }^{+}{\pi }^{-}$

Abstract

We first present a non-resonant description to charmonium-like structure $Y(4360)$ in the $\psi (2S){\pi }^{+}{\pi }^{-}$ invariant mass spectrum of the $e^{+}{e}^{-}\to \psi (2S){\pi }^{+}{\pi }^{-}$ process. The $Y(4360)$ structure is depicted well by the interference effect of the production amplitudes of $e^{+}{e}^{-}\to \psi (2S){\pi }^{+}{\pi }^{-}$ via the intermediate charmonia $\psi (4160)/\psi (4415)$ and direct $e^{+}{e}^{-}$ annihilation into $\psi (2S){\pi }^{+}{\pi }^{-}$. This fact shows that $Y(4360)$ is not a genuine resonance, which naturally explains why $Y(4360)$ was only reported in its hidden-charm decay channel $\psi (2S){\pi }^{+}{\pi }^{-}$ and was not observed in the exclusive open-charm decay channel or $R$-value scan.

4 pages, 1 table, 2 figures. Accepted for publication in Phys. Rev. D

References in corpus (22)

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Cited by in corpus (10)

• The hidden-charm pentaquark and tetraquark states
• An overview of $XYZ$ new particles
• Constructing $J/\psi$ family with updated data of charmoniumlike $Y$ states
• Prediction of a missing higher charmonium around 4.26 GeV in $J/\psi$ family
• Unified Fano-like interference picture for charmonium-like states $Y(4008)$, $Y(4260)$ and $Y(4360)$
• Correlation of the hidden-charm molecular tetraquarks and the charmoniumlike structures existing in the $B\to XYZ+K$
• Charmonium spectrum with a Dirac potential model in the momentum space
• Reconciling the X(2240) with the Y(2175)
• Coupled-channel study of $4S$-$3D$ mixing dynamics in $\psi (4220)$ and $\psi (4380)$
• Prospects for observing the missing $2D$ and $1F$ charmonium states around 4 GeV