arXiv 2210.048412022-10hep-ph

态$T_{cs}(2900)$和$T^a_{c\bar{s}}(2900)$的色通量管性质

Color flux-tube nature of the states $T_{cs}(2900)$ and $T^a_{c\bar{s}}(2900)$

Jia Wei, Yi-Heng Wang, Chun-Sheng An, Cheng-Rong Deng

备注：: 9 pages, 4 tables, comments are welcome
发表信息：: Phys. RevD.106.096023 (2022)
DOI：: 10.1103/PhysRevD.106.096023

摘要：

受LHCb合作组的$T_{cs0}(2900)^0$，$T_{cs1}(2900)^0$，$T^a_{c\bar{s}0}(2900)^{0}$和$T^a_{c\bar{s}0}(2900)^{++}$等态的启发，我们在多夸克色流管模型中系统地研究了具有不同自旋、同位旋或$U$ -自旋以及颜色组合的基态和$P$ -波态$[cs][\bar{u}\bar{d}]$和$[cu][\bar{s}\bar{d}]$的性质.将我们的结果与$T_{cs0}(2900)^0$和$T_{cs1}(2900)^0$态的自旋宇称和质量相匹配，我们可以将它们分别描述为模型中具有$I(J^{P})=1(0^+)$和$0(1^-)$的紧致态$[cs][\bar{u}\bar{d}]$。基态$T_{cs0}(2900)^0$主要由一个轴矢量$[cs]_{\bar{\mathbf{3}}_c}$和一个轴矢量$[\bar{u}\bar{d}]_{\mathbf{3}_c}$强重叠组成。$P$波态$T_{cs1}(2900)^0$主要由逐渐分离的标量或轴向矢量$[cs]_{\bar{\mathbf{3}}_c}$和哑铃形标量$[\bar{u}\bar{d}]_{\mathbf{3}_c}$组成.假设$T^a_{c\bar{s}0}(2900)^{0}$和$T^a_{c\bar{s}0}(2900)^{++}$属于同一个同位旋三重态，具有对称的$U$ -自旋和$J^P=0^+$的态$\left [[cu]_{\bar{\mathbf{3}}_c}[\bar{s}\bar{d}]_ {\mathbf{3}_c}\right ]_{\mathbf{1}_c}$的质量与模型中的态$T^a_{c\bar{s}0}(2900)^{0}$和$T^a_{c\bar{s}0}(2900)^{++}$的质量高度一致.在耦合两种颜色配置之后，状态$[cu][\bar{s}\bar{d}]$比状态$T^a_{c\bar{s}0}(2900)^{0}$和$T^a_{c\bar{s}0}(2900)^{++}$稍亮。此外，我们还讨论了模型中其它态的性质。

英文摘要：

Inspired by the states $T_{cs0}(2900)^0$, $T_{cs1}(2900)^0$, $T^a_{c\bar{s}0}(2900)^{0}$ and $T^a_{c\bar{s}0}(2900)^{++}$ reported by the LHCb Collaboration, we carry out a systematical investigation on the properties of the ground and $P$-wave states $[cs][\bar{u}\bar{d}]$ and $[cu][\bar{s}\bar{d}]$ with various spin, isospin or $U$-spin, and color combinations in a multiquark color flux-tube model. Matching our results with the spin-parity and mass of the states $T_{cs0}(2900)^0$ and $T_{cs1}(2900)^0$, we can describe them as the compact states $[cs][\bar{u}\bar{d}]$ with $I(J^{P})=1(0^+)$ and $0(1^-)$ in the model, respectively. The ground state $T_{cs0}(2900)^0$ is mainly made of strongly overlapped an axial-vector $[cs]_{\bar{\mathbf{3}}_c}$ and an axial-vector $[\bar{u}\bar{d}]_{\mathbf{3}_c}$. The $P$-wave state $T_{cs1}(2900)^0$ is dominantly consisted of a gradually separated scalar or axial vector $[cs]_{\bar{\mathbf{3}}_c}$ and a scalar $[\bar{u}\bar{d}]_{\mathbf{3}_c}$ in the shape of a dumbbell. Supposing the states $T^a_{c\bar{s}0}(2900)^{0}$ and $T^a_{c\bar{s}0}(2900)^{++}$ belong to the same isospin triplet, the mass of the state $\left [[cu]_{\bar{\mathbf{3}}_c}[\bar{s}\bar{d}]_ {\mathbf{3}_c}\right ]_{\mathbf{1}_c}$ with symmetrical $U$-spin and $J^P=0^+$ is highly consistent with that of the states $T^a_{c\bar{s}0}(2900)^{0}$ and $T^a_{c\bar{s}0}(2900)^{++}$ in the model. After coupling two color configurations, the state $[cu][\bar{s}\bar{d}]$ is slightly lighter than the states $T^a_{c\bar{s}0}(2900)^{0}$ and $T^a_{c\bar{s}0}(2900)^{++}$. In addition, we also discuss the properties of other states in the model.

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。

摘要：

英文摘要：

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