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arXiv · 1609.02712

$J/ψN$ interactions revisited and $Λ_b^0 \to J/ψK^- (π^-) p$ decays

C. W. Xiao
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Abstract

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

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C. W. Xiao. 2016-09-19. $J/ψN$ interactions revisited and $Λ_b^0 \to J/ψK^- (π^-) p$ decays. https://doi.org/10.1103/physrevd.95.014006

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