How does the $X(3872)$ show up in $e^+e^-$ collisions: dip versus peak
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866910486945071104 |
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| author | Baru, Vadim Guo, Feng-Kun Hanhart, Christoph Nefediev, Alexey |
| author_facet | Baru, Vadim Guo, Feng-Kun Hanhart, Christoph Nefediev, Alexey |
| contents | We demonstrate that the dip observed near the total energy of 3872 MeV in the recent cross section data from the BESIII Collaboration for $e^+e^-\to J/ψπ^+π^- $ admits a natural explanation as a coupled-channel effect: it is a consequence of unitarity and a strong $S$-wave $D\bar D^*$ attraction that generates the state $X(3872)$. We anticipate the appearance of a similar dip in the $e^+e^-\to J/ψπ^+π^-π^0$ final state near the $D^*\bar{D}^*$ threshold driven by the same general mechanism, then to be interpreted as a signature of the predicted spin-two partner of the $X(3872)$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_12003 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | How does the $X(3872)$ show up in $e^+e^-$ collisions: dip versus peak Baru, Vadim Guo, Feng-Kun Hanhart, Christoph Nefediev, Alexey High Energy Physics - Phenomenology We demonstrate that the dip observed near the total energy of 3872 MeV in the recent cross section data from the BESIII Collaboration for $e^+e^-\to J/ψπ^+π^- $ admits a natural explanation as a coupled-channel effect: it is a consequence of unitarity and a strong $S$-wave $D\bar D^*$ attraction that generates the state $X(3872)$. We anticipate the appearance of a similar dip in the $e^+e^-\to J/ψπ^+π^-π^0$ final state near the $D^*\bar{D}^*$ threshold driven by the same general mechanism, then to be interpreted as a signature of the predicted spin-two partner of the $X(3872)$. |
| title | How does the $X(3872)$ show up in $e^+e^-$ collisions: dip versus peak |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2404.12003 |