Search for hidden-charm pentaquark states in three-body final states
文献类型：期刊论文
| 作者 | Xie, JM; Ling, XZ; Liu, MZ; Geng, LS |
| 刊名 | EUROPEAN PHYSICAL JOURNAL C
 |
| 出版日期 | 2022 |
| 卷号 | 82期号:11页码:1061 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-022-11026-0 |
| 文献子类 | Article |
| 英文摘要 | The three pentaquark states, P-c(4312), P-c(4440) and P-c(4457), discovered by the LHCb Collaboration in 2019, are often interpreted as (D) over bar (()*()) Sigma(c) molecules. Together with their four (D) over bar (()*()) Sigma(c)* partners dictated by heavy quark spin symmetry they represent a complete multiplet of hadronic molecules of (D) over bar (()*()) Sigma(c)*. The pentaquark states were observed in the J/psi p invariant mass distributions of the Lambda b -> J/psi pK decay. It is widely recognized that to understand their nature, other discovery channels play an important role. In this work, we investigate two three-body decay modes of the (D) over bar (()*()) Sigma(c)* molecules. The tree-level modes proceed via off-shell Sigma(()(c)*()) baryons, (D) over bar (()*()) Sigma(c)* -> (D) over bar (()*()) (Sigma(()(c)*()) -> Lambda(c)pi) -> (D) over bar (()*()) Lambda(c)pi, while the triangle-loop modes proceed through (D) over bar* Sigma(c)* -> J/psi N pi, eta N-c pi via (D) over bar Sigma(()(c)*()) rescattering to J/psi N and eta N-c. Our results indicate that the decay widths of the P-c (4457) and (D) over bar (()*()) Sigma(c)* states into (D) over bar (()*()) Lambda(c)pi are several MeV, as a result can be observed in the upcoming Run 3 and Run 4 of LHC. The partial decay widths into (D) over bar (()*()) Lambda(c)pi of the P-c (4312) and P-c (4440) states range from tens to hundreds of keV. In addition, the partial decay widths of (D) over bar*Sigma(c) molecules into J/psi N pi and eta N-c pi are several keV and tens of keV, respectively, and the partial decay widths of (D) over bar*Sigma(c)* molecules into J/psi N pi vary from several keV to tens of keV. In particular, we show that the spin-5/2 (D) over bar*Sigma(c)* state can be searched for in the J/psi N pi and (D) over bar*Lambda(c)pi invariant mass distributions, while the latter one is more favorable. These three-body decay modes of the pentaquark states are of great value to further observations of the pentaquark states and to a better understanding of their nature. |
| 电子版国际标准刊号 | 1434-6052 |
| 语种 | 英语 |
| WOS记录号 | WOS:000888745600003 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/299472]  |
| 专题 | 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Xie, JM,Ling, XZ,Liu, MZ,et al. Search for hidden-charm pentaquark states in three-body final states[J]. EUROPEAN PHYSICAL JOURNAL C,2022,82(11):1061. |
| APA | Xie, JM,Ling, XZ,Liu, MZ,&Geng, LS.(2022).Search for hidden-charm pentaquark states in three-body final states.EUROPEAN PHYSICAL JOURNAL C,82(11),1061. |
| MLA | Xie, JM,et al."Search for hidden-charm pentaquark states in three-body final states".EUROPEAN PHYSICAL JOURNAL C 82.11(2022):1061. |
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来源：高能物理研究所
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