Hadronic decays of possible pseudoscalar $P$-wave $D\bar{D}^\ast/\bar{D}D^\ast$ molecular state
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866912605710319616 |
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| author | Liu, Shi-Dong Wu, Qi Li, Gang |
| author_facet | Liu, Shi-Dong Wu, Qi Li, Gang |
| contents | Recently, the new structure $G(3900)$ observed by the BESIII Collaboration in the $e^+e^-\to D\bar{D}$ was identified to be the $P$-wave $D\bar{D}^\ast/\bar{D}D^\ast$ vector molecular resonance using a unified meson exchange model. Apart from the vector $P$-wave state, a possible pseudoscalar $P$-wave molecular state of the $D\bar{D}^\ast/\bar{D}D^\ast$ [called $G_0(3900)$ for short] was also predicted, which is likely to be observed in future experiments. Within the molecular framework, we calculated the partial decay widths for a series of hadronic decays of the $G_0$, including $G_0\to ω(ρ^0) J/ψ$, $π^+π^- η_c (1S)$, $π^+π^- χ_{c1} (1P)$, and $D^0\bar{D}^0π^0$. Under present model parameters, the hidden-charm decay modes are dominated by the $G_0\toωJ/ψ$ and $G_0\toπ^+π^-η_c (1S)$, and the partial widths can reach 1 MeV and 0.1 MeV, respectively. The open-charm channel $G_0\to D^0\bar{D}^0π^0$ exhibits a rather small decay rate ($\sim 0.1~\mathrm{keV}$). In terms of our present predictions, we suggest BESIII and Belle II to search for the pseudoscalar $P$-wave $D\bar{D}^\ast / \bar{D}D^\ast$ molecular state with $J^{PC} = 0^{-+}$ in the hidden-charm processes $G_0 \to ωJ/ψ$ or $G_0 \to π^+π^-η_c(1S)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_18273 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hadronic decays of possible pseudoscalar $P$-wave $D\bar{D}^\ast/\bar{D}D^\ast$ molecular state Liu, Shi-Dong Wu, Qi Li, Gang High Energy Physics - Phenomenology Recently, the new structure $G(3900)$ observed by the BESIII Collaboration in the $e^+e^-\to D\bar{D}$ was identified to be the $P$-wave $D\bar{D}^\ast/\bar{D}D^\ast$ vector molecular resonance using a unified meson exchange model. Apart from the vector $P$-wave state, a possible pseudoscalar $P$-wave molecular state of the $D\bar{D}^\ast/\bar{D}D^\ast$ [called $G_0(3900)$ for short] was also predicted, which is likely to be observed in future experiments. Within the molecular framework, we calculated the partial decay widths for a series of hadronic decays of the $G_0$, including $G_0\to ω(ρ^0) J/ψ$, $π^+π^- η_c (1S)$, $π^+π^- χ_{c1} (1P)$, and $D^0\bar{D}^0π^0$. Under present model parameters, the hidden-charm decay modes are dominated by the $G_0\toωJ/ψ$ and $G_0\toπ^+π^-η_c (1S)$, and the partial widths can reach 1 MeV and 0.1 MeV, respectively. The open-charm channel $G_0\to D^0\bar{D}^0π^0$ exhibits a rather small decay rate ($\sim 0.1~\mathrm{keV}$). In terms of our present predictions, we suggest BESIII and Belle II to search for the pseudoscalar $P$-wave $D\bar{D}^\ast / \bar{D}D^\ast$ molecular state with $J^{PC} = 0^{-+}$ in the hidden-charm processes $G_0 \to ωJ/ψ$ or $G_0 \to π^+π^-η_c(1S)$. |
| title | Hadronic decays of possible pseudoscalar $P$-wave $D\bar{D}^\ast/\bar{D}D^\ast$ molecular state |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2506.18273 |