$P_{c}$-like pentaquarks in hidden strange sector

TL;DR

This paper predicts the existence of hidden strange molecular pentaquarks analogous to hidden charm states, identifying specific resonance states and their potential experimental counterparts using the quark delocalization color screening model.

Contribution

It introduces a study of hidden strange pentaquarks with specific quantum numbers, expanding the understanding of exotic hadrons in the strange sector.

Findings

Identification of resonance states $ ext{Σ}K$, $ ext{Σ}K^{*}$, $ ext{Σ}^{*}K^{*}$ with $IJ^{P}=\frac{1}{2}\frac{1}{2}^{-}$.

Prediction of $ ext{Σ}^{*}K$ as a strange partner of $P_{c}(4380)$ and $N^{*}(1875)$.

$ ext{Σ}K^{*}$ identified as $N^{*}(2100)$ observed in $ ext{φ}$ photo-production.

Abstract

Analogous to the work of hidden charm molecular pentaquarks, we study possible hidden strange molecular pentaquarks composed of $\Sigma$ (or $\Sigma^{*}$) and $K$ (or $K^{*}$) in the framework of quark delocalization color screening model. Our results suggest that the $\Sigma K$, $\Sigma K^{*}$ and $\Sigma^{*} K^{*}$ with $IJ^{P}=\frac{1}{2}\frac{1}{2}^{-}$ and $\Sigma K^{*}$, $\Sigma^{*} K$ and $\Sigma^{*} K^{*}$ with $IJ^{P}=\frac{1}{2}\frac{3}{2}^{-}$ are all resonance states by coupling the open channels. The molecular pentaquark $\Sigma^{*} K$ with quantum numbers $IJ^{P}=\frac{1}{2}\frac{3}{2}^{-}$ can be seen as a strange partner of the LHCb $P_{c}(4380)$ state, and it can be identified as the nucleon resonance $N^{*}(1875)$ listed in PDG. The $\Sigma K^{*}$ with quantum numbers $IJ^{P}=\frac{1}{2}\frac{3}{2}^{-}$ can be identified as the $N^{*}(2100)$, which was experimentally observed in the $\phi$ photo-production.