Observation of vector charmoniumlike states and search for $Z_{cs}$ in $e^+ e^- \to K^+ K^- J/\psi$ at BESIII

Hang Zhou

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arXiv · 2405.07734

Observation of vector charmoniumlike states and search for $Z_{cs}$ in $e^+ e^- \to K^+ K^- J/\psi$ at BESIII

Hang Zhou

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Abstract

We present the recent measurements of the $e^+e^-\to K^+K^- J/\psi$ process carried out by the BESIII experiment. A new decay mode $Y(4230)\to K^+K^- J/\psi$ is firstly identified by BESIII. Furthermore, two vector charmoniumlike states, $Y(4500)$ and $Y(4710)$, are reported for the first time in the energy-dependent line shape of $e^+e^-\to K^+K^- J/\psi$ cross section. In additon, an investigation of the $K^\pm J/\psi$ system is conducted to explore charged charmoniumlike states.

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Hang Zhou. 2024-05-13. Observation of vector charmoniumlike states and search for $Z_{cs}$ in $e^+ e^- \to K^+ K^- J/\psi$ at BESIII. https://arxiv.org/abs/2405.07734

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