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Possible interpretations of the P_c(4312), P_c(4440), and P_c(4457)

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arxiv 1903.11001 v3 pith:NVEFSYDJ submitted 2019-03-26 hep-ph hep-ex

Possible interpretations of the $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$

classification hep-ph hep-ex
keywords sigmaboundstateinterpretationsinterpretedpossiblestatesassignments
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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Cited by 2 Pith papers

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    Machine learning models trained on known hadron data and an extended Gürsey-Radicati mass formula predict masses for triply heavy baryons and numerous pentaquark states, agreeing with available data and forecasting un...