论文标题
状态的颜色通量管性质$ t_ {cs}（2900）$和$ t^a_ {c \ bar {s}}（2900）$
Color flux-tube nature of the states $T_{cs}(2900)$ and $T^a_{c\bar{s}}(2900)$
论文作者
论文摘要
受状态的启发$ t_ {cs0}（2900）^0 $，$ t_ {cs1}（2900）^0 $，$ t^a_ {c \ bar {s} 0} 0}（2900）^{0} $} $ t^a___ {c c \ bar {c c \ bar {s} $} $} 0} 0}（2900）对地面的特性进行了系统的调查，$ p $ - 波说$ [cs] [\ bar {u} \ bar {d}] $和$ [cu] [\ bar {s} \ bar {d}] $，带有各种旋转，isospin，isospin，isospin或$ u $ -spin或$ u $ -spin和compins in Multiquark-flux-flux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tux-tuxs compination。将我们的结果与状态的旋转 - 质量和质量匹配$ t_ {cs0}（2900）^0 $和$ t_ {cs1}（2900）^0 $，我们可以将它们描述为紧凑型状态$ [cs] [cs] [\ bar {u} u}模型分别。基态$ t_ {cs0}（2900）^0 $主要由强烈重叠的轴向矢量$ [cs] _ {\ bar {\ mathbf {\ MathBf {3}} _ c} $和轴向 - vector $ [\ bar $} $ p $ - 波状态$ t_ {cs1}（2900）^0 $主要由逐渐分开的标量或轴向向量$ [CS] _ {\ bar {\ mathbf {3}} _ c} $组成$ [\ bar {u} \ bar {d}] _ {\ mathbf {3} _c} $以哑铃形状。假设状态$ t^a_ {c \ bar {s} 0}（2900）^{0} $和$ t^a_ { [[CU] _ {\ bar {\ MathBf {3}} _ C} [\ bar {s} \ bar {d}] _ {\ MathBf {3} _C} _C} \ right] $ t^a_ {c \ bar {s} 0}（2900）^{0} $和$ t^a_ {c \ bar {s} 0}（2900）^{++} $在模型中。耦合两种颜色配置后，状态$ [cu] [\ bar {s} \ bar {d}] $比状态轻一些，$ t^a_ {c \ bar {s} 0}（2900）^{0}^{0} $ t^a___ t^a__ {c \ bar {c \ bar {c \ \ s} $ {s} $} $ {2900}（2900}（2900}（2900}（2900}（2900}（2900））此外，我们还讨论了模型中其他状态的属性。
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.
