论文标题
$ n \barΩ$绑定状态吗？
Are $N\barΩ$ bound states?
论文作者
论文摘要
受星际合作的$NΩ$ Dibaryon实验搜索进度的启发，我们在Quark Delocalization颜色筛选模型的框架中研究了$ n \barΩ$系统。我们的结果表明，$ n $和$ \ \barΩ$之间的吸引力比$ n $和$ω$之间的吸引力大一点，这表明$ n \barΩ$比$nΩ$更有可能形成绑定状态。动态计算表明，$ j^{p} = 1^{+} $和$ 2^{+} $ $ n \barΩ$系统都是绑定状态。这两个状态的绑定能量比$ j^{p} = 2^{+} $的$nΩ$系统更深，而$ j^{p} = 1^{+} $的$nΩ$系统是不限制的。低能散射相，散射长度和有效范围的计算还支持$ n \barΩ$绑定状态，$ j^{p} = 1^{+} $和$ 2^{+} $。因此，$ n \barΩ$状态是更好的六夸克州，并且预计实验中会有更强的信号。
Inspired by the progress of the experimental search of the $NΩ$ dibaryon by the STAR collaboration, we study $N\barΩ$ systems in the framework of quark delocalization color screening model. Our results show that the attraction between $N$ and $\barΩ$ is a little bit larger than that between $N$ and $Ω$, which indicates that it is more possible for the $N\barΩ$ than the $NΩ$ system to form bound states. The dynamic calculations state that both the $J^{P}=1^{+}$ and $2^{+}$ $N\barΩ$ systems are bound states. The binding energy of these two states are deeper than that of $NΩ$ systems with $J^{P}=2^{+}$, and the $NΩ$ system with $J^{P}=1^{+}$ is unbound. The calculation of the low-energy scattering phase shifts, scattering length and the effective range also supports the existence of the $N\barΩ$ bound states with $J^{P}=1^{+}$ and $2^{+}$. So the $N\barΩ$ states are better hexaquark states and stronger signals are expected in experiments.
