Analysis of Pcs(4338) and related pentaquark molecular states via QCD sum rules

In this study, we tentatively identify P-cs(4338) as the (D) over bar Xi(c) molecular state and distinguish the isospins of current operators to explore in detail the (D) over bar Xi(c), (D) over bar Lambda(c), <(D)(s)over bar>Xi(c) ,(D) over bar (s)Lambda(c),(D) over bar*Xi(c) (D) over bar*Lambda(c), (D) over bar (s)*Xi(c) and (D) over bar (s)*Lambda(c) molecular states without strange, with strange, and with double strange in the framework of QCD sum rules. The present exploration favors identifying P-cs(4338) (P-cs(4459)) as the (D) over bar Xi(c) ((D) over bar*Xi(c) ) molecular state with the spin-parity J(P) = 1/2(-)(3/2(-)) and isospin (I,I-3) = (0,0), and the observation of their cousins with the isospin (I,I-3) = (1,0) in the J/psi Sigma(0)/eta(c)Sigma(0) invariant mass distributions would decipher their inner structures.

Automated summary

In this study, the authors utilize QCD sum rules to identify P-cs(4338) as the (D) over bar Xi(c) molecular state and investigate various molecular states with different strangeness in detail. The results suggest that P-cs(4338) (P-cs(4459)) can be identified as the (D) over bar Xi(c) ((D) over bar*Xi(c)) molecular state with specific spin-parity and isospin values. Observing related states with different isospin values in the invariant mass distributions would provide insights into their internal structures.