$J/\psi N$ interactions revisited and ${\Lambda }_b^0\to J/\psi K^{-}({\pi }^{-})p$ decays

Abstract

Recently LHCb experiments confirmed the findings of the two $P_c$ states in the ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decays. In the present work, we investigate both the ${\Lambda }_b^0\to J/\psi K^{-}p$ and the ${\Lambda }_b^0\to J/\psi p{\pi }^{-}$ decays, continuing the investigations of our former works on the interactions of $J/\psi N$ with its coupled channels by considering the s-/u- channel contributions. We obtain consistent results of the line-shape of the $J/\psi N$ invariant mass distribution with the LHCb experiments, and favour the $P_c(4450)$ state as a ${\bar{D}}^{\ast }{\Sigma }_c$ bound state with $J=1/2^{-}$.

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References in corpus (9)

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• K^- p scattering length from scattering experiments
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Cited by in corpus (5)

• Pentaquark and Tetraquark states
• Hidden-charm pentaquarks and their hidden-bottom and $B_c$-like partner states
• How to reveal the nature of three or more pentaquark states?
• Hidden charm pentaquark and $\Lambda (1405)$ in the ${\Lambda }_b^0\to {\eta }_c{K}^{-}p(\pi \Sigma )$ reaction
• Is two-poles' $\Lambda (1405)$ one state or two?