Three-body unitary coupled-channel analysis on η(1405/1475)
| العنوان: | Three-body unitary coupled-channel analysis on η(1405/1475) |
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| المؤلفون: | S. X. Nakamura, Q. Huang, J.-J. Wu, H. P. Peng, Y. Zhang, Y. C. Zhu |
| المصدر: | INSPIRE-HEP Physical Review |
| بيانات النشر: | American Physical Society (APS), 2023. |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | High Energy Physics - Phenomenology, Nuclear Theory, High Energy Physics - Experiment |
| الوصف: | The recent BESIII data on $J/\psi\to\gamma(K_SK_S\pi^0)$, which is significantly more precise than earlier $\eta(1405/1475)$-related data, enables quantitative discussions on $\eta(1405/1475)$ at the previously unreachable level. We conduct a three-body unitary coupled-channel analysis of experimental Monte-Carlo outputs for radiative $J/\psi$ decays via $\eta(1405/1475)$: $K_SK_S\pi^0$ Dalitz plot distributions from the BESIII, and branching ratios of $\gamma(\eta\pi^+\pi^-)$ and $\gamma(\gamma\pi^+\pi^-)$ final states relative to that of $\gamma(K\bar{K}\pi)$. Our model systematically considers (multi-)loop diagrams and an associated triangle singularity, which is critical in making excellent predictions on $\eta(1405/1475)\to \pi\pi\pi$ lineshapes and branching ratios. The $\eta(1405/1475)$ pole locations are revealed for the first time. Two poles for $\eta(1405)$ are found on different Riemann sheets of the $K^*\bar{K}$ channel, while one pole for $\eta(1475)$. The $\eta(1405/1475)$ states are described with two bare states dressed by continuum states. The lower bare state would be an excited $\eta^\prime$, while the higher one could be an excited $\eta^{(\prime)}$, hybrid, glueball, or their mixture. This work presents the first-ever pole determination based on a manifestly three-body unitary coupled-channel framework applied to experimental three-body final state distributions (Dalitz plots). Comment: 7 pages, 6 figures; (v2) published version; statistical errors for eta(1405/1475) pole positions are added |
| تدمد: | 2470-0029 2470-0010 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c11fc57a5704f2c76eeb78d9f194bd15 https://doi.org/10.1103/physrevd.107.l091505 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....c11fc57a5704f2c76eeb78d9f194bd15 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24700029 24700010 |
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