Possible open charm molecular pentaquarks from $\Lambda_cK^{(*)}/\Sigma_cK^{(*)}$ interactions

TL;DR

This study uses the one-boson-exchange model to predict several possible open-charm and hidden-charm molecular pentaquarks involving $ ext{Y}_c$ and $ar{ ext{K}}^{(*)}$ interactions, considering wave mixing and coupled channels.

Contribution

It is the first to systematically predict open-charm and hidden-charm molecular pentaquarks from $ ext{Y}_cK^{(*)}$ and $ ext{Y}_car{K}^{(*)}$ interactions including wave mixing and coupled channels effects.

Findings

Predicted several open-charm molecular pentaquarks with specific quantum numbers.

Identified potential hidden-charm molecular candidates involving $ ext{Y}_car{K}^{(*)}$ systems.

Extended the study to include coupled channel effects and wave mixing.

Abstract

In this work, we adopt the one-boson-exchange model to study the $Y_cK^{(*)} (Y_c=\Lambda_c, \Sigma_c)$ interactions. After considering both of the $S-D$ wave mixing effects and the coupled channel effects, we can predict several possible open-charm molecular pentaquarks, i.e., the single $\Sigma_cK^*$ molecular states with $I(J^P)=1/2(1/2^-)$, $1/2(3/2^-)$ and $3/2(1/2^-)$, the coupled $\Lambda_cK^*/\Sigma_cK^*$ molecular states with $1/2(1/2^-)$ and $1/2(3/2^-)$, and the coupled $\Sigma_cK/\Lambda_cK^*/\Sigma_cK^*$ molecular state with $1/2(1/2^-)$. Meanwhile, we extend our study to the $Y_c\bar{K}^{(*)}$ interactions, our results suggest the $\Sigma_c\bar{K}$ system with $I(J^P)=1/2(1/2^-)$, the $\Sigma_c\bar{K}^*$ systems with $1/2(1/2^-)$, $1/2(3/2^-)$, and $3/2(3/2^-)$, the coupled $\Lambda_c\bar{K}^*/\Sigma_c\bar K^*$ system with $1/2(1/2^-)$, and the $\Sigma_c\bar{K}/\Lambda_c\bar{K}^*/\Sigma_c\bar K^*$ system with $1/2(1/2^-)$ can be the prime molecular candidates.