Insights into the nature of the $P_{cs}(4459)$

Abstract

We study the nature of the recently observed $P_{cs}(4459)$ by the LHCb collaboration by employing three methods based on the elastic effective-range expansion and the resulting size of the effective-range, the saturation of the compositeness relation and width of the resonance, and a direct fit to data involving the channels $J/\psi \Lambda$, ${\Xi }_c^{\prime }\bar{D}$ and ${\Xi }_c{\bar{D}}^{\ast }$. We have also considered the addition of a CDD pole but this scenario can be discarded. Our different analyses clearly indicate the molecular nature of the $P_{cs}(4459)$ with a clear ${\Xi }_c{\bar{D}}^{\ast }$ dominant component. In relation with heavy-quark-spin symmetry our results also favor the actual existence of two resonances with $J=1/2$ (the lighter one) and $3/2$ (the heavier one) in the energy region of the $P_{cs}(4459)$. In the scenario of two-resonance for the $P_{cs}(4459)$, the inclusion of the ${\Xi }_c^{\prime }\bar{D}$ channel is required for the their mass splitting and it allows one to determine the spin structures of the two resonances.

23 pages, 1 figure

References in corpus (11)

• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Evidence of a $J/\psi \Lambda$ structure and observation of excited ${\Xi }^{-}$ states in the ${\Xi }_b^{-}\to J/\psi \Lambda K^{-}$ decay
• Emergence of a complete heavy-quark spin symmetry multiplet: seven molecular pentaquarks in light of the latest LHCb analysis
• Interpretation of the LHCb $P_c$ States as Hadronic Molecules and Hints of a Narrow $P_c(4380)$
• Anatomy of the newly observed hidden-charm pentaquark states: $P_c(4312)$, $P_c(4440)$ and $P_c(4457)$
• Comprehensive analysis of the wave function of a hadronic resonance and its compositeness
• Spectrum of the strange hidden charm molecular pentaquarks in chiral effective field theory
• Revisiting the nature of the $P_c$ pentaquarks
• Insights into the inner structures of the fully charmed tetraquark state $X(6900)$
• Heavy-hadron molecular spectrum from light-meson exchange saturation

Cited by in corpus (3)

• Fine Structure of Pentaquark Multiplets in the Dynamical Diquark Model
• Analysis on the composite nature of the light scalar mesons $f_0(980)$ and $a_0(980)$
• Molecular interpretation of the LHCb pentaquarks from an analysis of $J/\psi p$ spectrum