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    A novel explanation of charmonium-like structure in e+eβˆ’β†’Οˆ(2S)Ο€+Ο€βˆ’e^+e^-\to \psi(2S)\pi^+\pi^-

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    We first present a non-resonant description to charmonium-like structure Y(4360)Y(4360) in the ψ(2S)Ο€+Ο€βˆ’\psi(2S)\pi^+\pi^- invariant mass spectrum of the e+eβˆ’β†’Οˆ(2S)Ο€+Ο€βˆ’e^+e^-\to \psi(2S)\pi^+\pi^- process. The Y(4360)Y(4360) structure is depicted well by the interference effect of the production amplitudes of e+eβˆ’β†’Οˆ(2S)Ο€+Ο€βˆ’e^{+} e^{-} \to \psi(2S) \pi^+ \pi^- via the intermediate charmonia ψ(4160)/ψ(4415)\psi(4160)/\psi(4415) and direct e+eβˆ’e^+e^- annihilation into ψ(2S)Ο€+Ο€βˆ’\psi(2S)\pi^+ \pi^-. This fact shows that Y(4360)Y(4360) is not a genuine resonance, which naturally explains why Y(4360)Y(4360) was only reported in its hidden-charm decay channel ψ(2S)Ο€+Ο€βˆ’\psi(2S)\pi^+\pi^- and was not observed in the exclusive open-charm decay channel or RR-value scan.Comment: 4 pages, 1 table, 2 figures. Accepted for publication in Phys. Rev.
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