QCD sum rule study for hidden-strange pentaquarks*

Inspired by the LHCb's observations of hidden-charm $P_{c(s)}$ states, we study their hidden-strange analogues $P_s$ states in both $[udu][\bar ss]$ and $[uds][\bar su]$ configurations. We investigate pentaquark $p\eta^\prime$, $p\phi$, $\Lambda K$, $\Sigma K$ $\Sigma^\ast K^\ast$ structures with $J^P = \frac{1}{2}^-$ ^\ast \frac{3}{2}^-$, calculate masses framework QCD sum rules. Our numerical results show that extracted hadron for all are much higher than mass threshold also corresponding hadron, so no bound state exists such channels, which is consistent experimental status to date.