Analysis of Pcs(4338) and related pentaquark molecular states via QCD sum rules |
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| Authors: | Xiu-Wu Wang Zhi-Gang Wang |
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| Affiliation: | Department of Physics, North China Electric Power University, Baoding 071003, China |
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| Abstract: | In this study, we tentatively identify \begin{document}$ P_{cs}(4338) $\end{document}![]() ![]() as the \begin{document}$ \bar{D}\Xi_c $\end{document}![]() ![]() molecular state and distinguish the isospins of current operators to explore in detail the\begin{document}$ \bar{D}\Xi_c $\end{document}![]() ![]() , \begin{document}$ \bar{D}\Lambda_c $\end{document}![]() ![]() , \begin{document}$ \bar{D}_s\Xi_c $\end{document}![]() ![]() , \begin{document}$ \bar{D}_s\Lambda_c $\end{document}![]() ![]() , \begin{document}$ \bar{D}^*\Xi_c $\end{document}![]() ![]() , \begin{document}$ \bar{D}^*\Lambda_c $\end{document}![]() ![]() , \begin{document}$ \bar{D}^*_s\Xi_c $\end{document}![]() ![]() , and \begin{document}$ \bar{D}^*_s\Lambda_c $\end{document}![]() ![]() molecular states without strange, with strange, and with double strange in the framework of QCD sum rules. The present exploration favors identifying \begin{document}$ P_{cs}(4338) $\end{document}![]() ![]() (\begin{document}$ P_{cs}(4459) $\end{document}![]() ![]() ) as the \begin{document}$ \bar{D}\Xi_c $\end{document}![]() ![]() (\begin{document}$ \bar{D}^*\Xi_c $\end{document}![]() ![]() ) molecular state with the spin-parity \begin{document}$ J^P={\dfrac{1}{2}}^- $\end{document}![]() ![]() (\begin{document}$ {\dfrac{3}{2}}^- $\end{document}![]() ![]() ) and isospin \begin{document}$ (I,I_3)=(0,0) $\end{document}![]() ![]() , and the observation of their cousins with the isospin \begin{document}$ (I,I_3)=(1,0) $\end{document}![]() ![]() in the \begin{document}$ J/\psi\Sigma^0/\eta_c\Sigma^0 $\end{document}![]() ![]() invariant mass distributions would decipher their inner structures. |
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| Keywords: | pentaquark molecular states QCD sum rules |
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