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Heavy quark spin multiplet structure of $P_c(4312)$, $P_c(4440)$, and $P_c(4457)$ | | Yuki Shimizu
; Yasuhiro Yamaguchi
; Masayasu Harada
; | | Date: |
1 Apr 2019 | | Abstract: | Very recently, the LHCb collaboration has reported the new result about the
hidden-charm pentaquarks: $P_c(4312)$ near the $ar{D}Sigma_c$ threshold, and
$P_c(4440)$ and $P_c(4457)$ near $ar{D}^*Sigma_c$ threshold. We study the
heavy quark spin (HQS) multiplet structures of these newly $P_c$ pentaquarks
under the heavy quark spin symmetry based on the hadronic molecular picture. We
point out that $P_c(4312)$ is the $J^P = 1/2^-$ member of an HQS triplet, and
$P_c(4440)$ and $P_c(4457)$ are the $J^P = 3/2^-$ member of the HQS triplet and
an HQS singlet with $J^P = 3/2^-$. Namely, the $P_c(4312)$ and one of
$P_c(4440)$ and $P_c(4457)$ belong to an HQS triplet. The HQS multiplet
structure predicts the existence of $J^P = 5/2^-$ state near
$ar{D}^astSigma_c^ast$ threshold. | | Source: | arXiv, 1904.0587 | | Services: | Forum | Review | PDF | Favorites | |
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