arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2201.06710hep-ph
收藏

色单重-单重型五夸克态的同位旋本征态

Isospin eigenstates of the color singlet-singlet type pentaquark states

Xiu-Wu Wang, Zhi-Gang Wang, Guo-Liang Yu, Qi Xin

发表信息：
Sci. China-Phys. Mech. Astron. 65, 291011 (2022)
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

本文利用等自旋$(I,I_3)=(\frac{1}{2},\frac{1}{2})$和$(\frac{3}{2},\frac{1}{2})$构造了色单重-单重型五夸克流，首次利用QCD求和规则研究了$\bar{D}Σ_c$，$\bar{D}Σ_c^*$，$\bar{D}^*Σ_c$和$\bar{D}^*Σ_c^*$五夸克态，其中$\bar{D}$，$Σ_c$，$\cdots$代表与相应的物理介子或重子具有相同量子数的色单重团簇.计算结果支持将$P_c(4312)$、$P_c(4380)$、$P_c(4440)$和$P_c(4457)$分别指定为具有同位旋$I=\frac{1}{2}$的$\bar{D}Σ_c$、$\bar{D}Σ_c^*$、$\bar{D}^*Σ_c$和$\bar{D}^*Σ_c^*$五夸克态.与同位旋$I=\frac{3}{2}$对应的$\bar{D}Σ_c$、$\bar{D}Σ_c^*$、$\bar{D}^*Σ_c$和$\bar{D}^*Σ_c^*$五夸克态质量稍大，对更高五夸克候选态在$J/ψΔ$不变质量谱中的观测将有助于揭示$P_c$态的性质，并有助于区分彩色反三线态-反三线态-反三线态和彩色单重态-单重态的情形.

英文摘要：

In this article, we construct the color singlet-singlet type five-quark currents with the isospins $(I,I_3)=(\frac{1}{2},\frac{1}{2})$ and $(\frac{3}{2},\frac{1}{2})$ unambiguously to explore the $\bar{D}Σ_c$, $\bar{D}Σ_c^*$, $\bar{D}^*Σ_c$ and $\bar{D}^*Σ_c^*$ pentaquark states via the QCD sum rules for the first time, where the $\bar{D}$, $Σ_c$, $\cdots$ represent the color-singlet clusters having the same quantum numbers as the corresponding physical mesons or baryons. The numerical results support assigning the $P_c(4312)$, $P_c(4380)$, $P_c(4440)$ and $P_c(4457)$ as the $\bar{D}Σ_c$, $\bar{D}Σ_c^*$, $\bar{D}^*Σ_c$ and $\bar{D}^*Σ_c^*$ pentaquark states with the isospin $I=\frac{1}{2}$, respectively. The corresponding $\bar{D}Σ_c$, $\bar{D}Σ_c^*$, $\bar{D}^*Σ_c$ and $\bar{D}^*Σ_c^*$ pentaquark states with the isospin $I=\frac{3}{2}$ have slightly larger masses, the observations of the higher pentaquark candidates in the $J/ψΔ$ invariant mass spectrum would shed light on the nature of the $P_c$ states, and make contributions in distinguishing the scenarios of color antitriplet-antitriplet-antitriplet type and color singlet-singlet type pentaquark states.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑