On the quantum numbers of the $X(1880)$
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arXiv
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| Format: | Preprint |
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2024
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| _version_ | 1866918273942028288 |
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| author | Yang, Qin-He Dai, Ling-Yun Meißner, Ulf-G. |
| author_facet | Yang, Qin-He Dai, Ling-Yun Meißner, Ulf-G. |
| contents | We study the properties of the $X(1880)$, the structure around the $\bar{p}p$ threshold that appears in the $3(π^+π^-)$ invariant mass spectrum in the decay process of $J/ψ\to γ3(π^+π^-)$. Nucleon-antinucleon rescattering is taken into account in our analysis, and the decay amplitude of $J/ψ\to γ3(π^+π^-)$ can be obtained by the distorted wave Born approximation. With these amplitudes, we analyze the contributions to the $X(1880)$ from different partial waves. Our analysis suggests that the $X(1880)$ should be isoscalar $0^{-+}$, and it is generated by the threshold behavior. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2412_07599 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On the quantum numbers of the $X(1880)$ Yang, Qin-He Dai, Ling-Yun Meißner, Ulf-G. High Energy Physics - Phenomenology Nuclear Theory We study the properties of the $X(1880)$, the structure around the $\bar{p}p$ threshold that appears in the $3(π^+π^-)$ invariant mass spectrum in the decay process of $J/ψ\to γ3(π^+π^-)$. Nucleon-antinucleon rescattering is taken into account in our analysis, and the decay amplitude of $J/ψ\to γ3(π^+π^-)$ can be obtained by the distorted wave Born approximation. With these amplitudes, we analyze the contributions to the $X(1880)$ from different partial waves. Our analysis suggests that the $X(1880)$ should be isoscalar $0^{-+}$, and it is generated by the threshold behavior. |
| title | On the quantum numbers of the $X(1880)$ |
| topic | High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2412.07599 |