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Establishing the first hidden-charm pentaquark with strangeness | | Hua-Xing Chen
; Wei Chen
; Xiang Liu
; Xiao-Hai Liu
; | | Date: |
2 Nov 2020 | | Abstract: | We study the $P_{cs}(4459)^0$ recently observed by LHCb using the method of
QCD sum rules. Our results support its interpretation as the $ar D^* Xi_c$
hadronic molecular state of either $J^P=1/2^-$ or $3/2^-$. Within the molecular
picture, the three LHCb experiments observing $P_c$ and $P_{cs}$
states~cite{lhcb,Aaij:2015tga,Aaij:2019vzc} can be well understood as a whole.
We propose to further investigate the $P_{cs}(4459)^0$ to examine whether it
can be separated into two states. We also propose to search for the $ar D
Xi_c$ molecular state of $J^P=1/2^-$, whose mass is predicted to be
$4.29^{+0.13}_{-0.12}$~MeV. | | Source: | arXiv, 2011.01079 | | Services: | Forum | Review | PDF | Favorites | |
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