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Possible interpretations of the $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$
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abstract
Based on our previous QCD sum rule studies on hidden-charm pentaquark states, we discuss possible interpretations of the $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$, which were recently observed by LHCb. Our results suggest that the $P_c(4312)$ can be well interpreted as the $[\Sigma_c^{++} \bar D^-]$ bound state with $J^P = 1/2^-$, while the $P_c(4440)$ and $P_c(4457)$ can be interpreted as the $[\Sigma_c^{+} \bar D^0]$ bound state with $J^P = 1/2^-$, the $[\Sigma_c^{*++} \bar D^{-}]$ and $[\Sigma_c^{+} \bar D^{*0}]$ bound states with $J^P = 3/2^-$, or the $[\Sigma_c^{*+} \bar D^{*0}]$ bound state with $J^P = 5/2^-$. We propose to measure their spin-parity quantum numbers to verify these assignments.
Forward citations
Cited by 2 Pith papers
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Prediction of $QQqq\bar{s}$ molecular pentaquarks within the extended local hidden gauge approach
A model calculation predicts fourteen double-heavy molecular pentaquark states, but their existence and binding energies depend critically on an unconstrained regularization parameter.
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$P_c(4440)$ and $P_c(4457)$ decay into $\bar{D}\Sigma_c$ and $\bar{D}\Lambda_c$ and the spin of the $P_c$ states
The authors compute partial decay widths to discriminate the spin-parity of the Pc(4440) and Pc(4457) pentaquark states, favoring the 1/2-, 3/2- assignment.
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