Research PapersNo Access

Analysis of the $P_{c s} (4459)$ as the hidden-charm pentaquark state with QCD sum rules

Department of Physics, North China Electric Power University, Baoding 071003, P. R. China

https://doi.org/10.1142/S0217751X21500718Cited by:43 (Source: Crossref)

Abstract

In this paper, we study the scalar-diquark–scalar-diquark–antiquark-type $u d s c \bar{c}$ pentaquark state with the QCD sum rules, the predicted mass $M_{P} = 4.47 \pm 0.11 GeV$ is in excellent agreement with the experimental data $4458.8 \pm 2 . 9_{- 1.1}^{+ 4.7} MeV$ from the LHCb collaboration, and supports assigning the $P_{c s} (4459)$ to be the hidden-charm pentaquark state with the spin-parity $J^{P} = {\frac{1}{2}}^{-}$ . We take into account the flavor $S U (3)$ mass-breaking effect, and estimate the mass spectrum of the diquark–diquark–antiquark-type $u d s c \bar{c}$ pentaquark states with the strangeness $S = - 1$ .

Keywords:

PACS: 12.39.Mk, 14.20.Lq, 12.38.Lg

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