Inspired by the progress of the experimental search of the $N\Omega$ dibaryon by the STAR collaboration, we study $N\bar{ \Omega}$ systems in the framework of quark delocalization color screening model. Our results show that the attraction between $N$ and $\bar{ \Omega}$ is a little bit larger than that between $N$ and $\Omega$, which indicates that it is more possible for the $N\bar{ \Omega}$ than the $N\Omega$ system to form bound states. The dynamic calculations state that both the $J^{ P}=1^{ +}$ and $2^{ +}$ $N\bar{ \Omega}$ systems are bound states. The binding energy of these two states are deeper than that of $N\Omega$ systems with $J^{ P}=2^{ +}$, and the $N\Omega$ 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 $N\bar{ \Omega}$ bound states with $J^{ P}=1^{ +}$ and $2^{ +}$. So the $N\bar{ \Omega}$ states are better hexaquark states and stronger signals are expected in experiments.
Categories: nucl-th hep-ph