On the hidden charm pentaquark-s in ${\Lambda }_b\to J/\psi K^{-}p$ decay

Abstract

In a previous work we presented a theoretical analysis of the ${\Lambda }_b\to J/\psi K^{-}p$ reaction from where a recent experiment by the LHCb collaboration at CERN claimed the existence of two hidden charm pentaquarks, $P_c(4380{)}^{+}$ and $P_c(4450{)}^{+}$. In that work we focused only on the $\Lambda (1405)$ and $P_c(4450{)}^{+}$ signals and discussed the possible explanation of this pentaquark state within the picture of a dynamical meson-baryon molecule made up mostly from ${\bar{D}}^{\ast }{\Sigma }_c$ and ${\bar{D}}^{\ast }{\Sigma }_c^{\ast }$ components. In the present work we improve upon the previous one by considering the total $K^{-}p$ and $J/\psi p$ data including all the relevant resonances contributing to the spectra, and discuss the possible nature of both $P_c(4380{)}^{+}$ and $P_c(4450{)}^{+}$. We also discuss several important topics, like the effect of the contact term in the reaction, the viability of reproducing the data without the $P_c(4380{)}^{+}$ and the possible quantum numbers assignment to these pentaquarks.

12 pages, 10 figures

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Cited by in corpus (16)

• Pentaquark and Tetraquark states
• Structure and decays of hidden heavy pentaquarks
• Nucleon Resonances with Hidden Charm in $\gamma p$ reactions
• Decay behaviors of possible ${\Lambda }_{c\bar{c}}$ states in hadronic molecule pictures
• Pentaquarks with hidden charm as hadroquarkonia
• How to reveal the nature of three or more pentaquark states?
• Heavy Baryons and their Exotics from Instantons in Holographic QCD
• Theoretical description of the decays ${\Lambda }_b\to {\Lambda }^{(\ast )}({\frac{1}{2}}^{\pm },{\frac{3}{2}}^{\pm })+J/\psi$
• Heavy and Strange Holographic Baryons
• Heavy Holographic Exotics: Tetraquarks as Efimov States
• Resonances in heavy meson - heavy baryon coupled-channel interactions
• Forming Molecular States with Hadronic Rescattering
• Hidden-strange molecular states and the $N\varphi$ bound state via a QCD van der Waals force
• Hidden charm pentaquark and $\Lambda (1405)$ in the ${\Lambda }_b^0\to {\eta }_c{K}^{-}p(\pi \Sigma )$ reaction
• Molecular states in $D_s^{(\ast )+}{\Xi }_c^{{(}^{\prime },\ast )}$ systems
• $P_c(4457)$ interpreted as a $J^P=1/2^{+}$ state by ${\bar{D}}^0{\Lambda }_c^{+}(2595)$-${\pi }^0{P}_c(4312)$ interaction