On the nature of X(3960)
| Autor: | Chen, Yu, Chen, Hao, Meng, Ce, Qi, Hong-Rong, Zheng, Han-Qing |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Eur. Phys. J. C 83 (2023) 381 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1140/epjc/s10052-023-11527-6 |
| Popis: | A near-threshold enhancement in the $D_s^+ D_s^-$ system, dubbed as $X(3960)$, is observed by the LHCb collaboration recently. A combined analysis on $\chi_{c0}(3930)~(\to D^+ D^-)$, $X(3960)~(\to D_s^+ D_s^-)$, and $X(3915)~(\to J/\psi\omega)$ is performed using both a $K$-matrix approach of $D_{(s)}\bar{D}_{(s)}$ four-point contact interactions and a model of Flatt\'e-like parameterizations. The use of the pole counting rule and spectral density function sum rule indicate, under current statistics, that this $D_s^+ D_s^-$ near-threshold state has probably the mixed nature of a $c\bar{c}$ confining state and $D_s^+ D_s^-$ continuum. Comment: 8 pages, 4 figures, 5 tables |
| Databáze: | arXiv |
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