Direct Evidence for the $\bar{D}D^*/D\bar{D}^*$ Molecular Nature of $G(3900)$ Through Triangular Singularity Mechanisms
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866929682977390592 |
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| author | Huang, Yin Chen, Xurong |
| author_facet | Huang, Yin Chen, Xurong |
| contents | The exotic hadron $G(3900)$, initially observed in the process $e^+ e^- \to D\bar{D}$, has been further supported by analyses from the BESIII Collaboration, which classify it as a $P$-wave molecular state of $D^{+}D^{*-}/D^{-}D^{*+}$. However, theoretical discussions raise concerns about its status as a true particle, emphasizing the need for additional studies. In this Letter, we employ the triangular singularity mechanism to investigate $G(3900)$ across various reaction channels, allowing us to produce significant peaks without relying on the existence of a real particle. We identify $X(4020)$, $Y(4320)$, and the tentative $X(4014)$ as potential sources of these peaks via decay processes to $γG(3900)$ or $πG(3900)$. We stress the importance of experimental explorations of $e^+ e^- \to X/Y \to γ(π) G(3900)$, which are essential for confirming the molecular composition of $D^{+}D^{*-}/D^{-}D^{*+}$ and refining the mass measurement of $G(3900)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_10992 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Direct Evidence for the $\bar{D}D^*/D\bar{D}^*$ Molecular Nature of $G(3900)$ Through Triangular Singularity Mechanisms Huang, Yin Chen, Xurong High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory The exotic hadron $G(3900)$, initially observed in the process $e^+ e^- \to D\bar{D}$, has been further supported by analyses from the BESIII Collaboration, which classify it as a $P$-wave molecular state of $D^{+}D^{*-}/D^{-}D^{*+}$. However, theoretical discussions raise concerns about its status as a true particle, emphasizing the need for additional studies. In this Letter, we employ the triangular singularity mechanism to investigate $G(3900)$ across various reaction channels, allowing us to produce significant peaks without relying on the existence of a real particle. We identify $X(4020)$, $Y(4320)$, and the tentative $X(4014)$ as potential sources of these peaks via decay processes to $γG(3900)$ or $πG(3900)$. We stress the importance of experimental explorations of $e^+ e^- \to X/Y \to γ(π) G(3900)$, which are essential for confirming the molecular composition of $D^{+}D^{*-}/D^{-}D^{*+}$ and refining the mass measurement of $G(3900)$. |
| title | Direct Evidence for the $\bar{D}D^*/D\bar{D}^*$ Molecular Nature of $G(3900)$ Through Triangular Singularity Mechanisms |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2501.10992 |