Heavy quark spin symmetric molecular states from ${\bar{D}}^{(\ast )}{\Sigma }_c^{(\ast )}$ and other coupled channels in the light of the recent LHCb pentaquarks

Abstract

We consider the ${\bar{D}}^{(\ast )}{\Sigma }_c^{(\ast )}$ states, together with $J/\psi N$ and other coupled channels, and take an interaction consistent with heavy quark spin symmetry, with the dynamical input obtained from an extension of the local hidden gauge approach. By fitting only one parameter to the recent three pentaquark states reported by the LHCb collaboration, we can reproduce the three of them in base to the mass and the width, providing for them the quantum numbers and approximate molecular structure as $1/2^{-}$ $\bar{D}{\Sigma }_c$, $1/2^{-}$ ${\bar{D}}^{\ast }{\Sigma }_c$, and $3/2^{-}$ ${\bar{D}}^{\ast }{\Sigma }_c$, and isospin $I=1/2$. We find another state around 4374 MeV, of $3/2^{-}$ $\bar{D}{\Sigma }_c^{\ast }$ structure, for which indications appear in the experimental spectrum. Two other near degenerate states of $1/2^{-}$ ${\bar{D}}^{\ast }{\Sigma }_c^{\ast }$ and $3/2^{-}$ ${\bar{D}}^{\ast }{\Sigma }_c^{\ast }$ nature are also found around 4520 MeV, which although less clear, are not incompatible with the observed spectrum. In addition, a $5/2^{-}$ ${\bar{D}}^{\ast }{\Sigma }_c^{\ast }$ state at the same energy appears, which however does not couple to $J/\psi p$ in $S-$wave, and hence it is not expected to show up in the LHCb experiment.

8 pages

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Cited by in corpus (68)

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• Possibility to study pentaquark states $P_c(4312),P_c(4440)$, and $P_c(4457)$ in $\gamma p\to J/\psi p$ reaction
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• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
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• Semi-inclusive lepto-production of hidden-charm exotic hadrons
• Holographic charm and bottom pentaquarks II: Open and hidden decay widths
• Forming Molecular States with Hadronic Rescattering
• Double Exotic States Productions in Pion and Kaon Induced Reactions
• Evidence supporting the existence of $P_c(4380{)}^{\pm }$ from the recent measurements of $B_s\to J/\psi p\bar{p}$
• Strong decays of $P_{\psi }^N(4312{)}^{+}$ to $J/\psi ({\eta }_c)p$ and ${\bar{D}}^{(\ast )}{\Lambda }_c$ within the Bethe-Salpeter framework
• Unravelling Pentaquarks with Born--Oppenheimer effective theory
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• Holographic charm and bottom pentaquarks III: Excitations through photo-production of heavy mesons
• Heavy quark spin partners of the $Y(4260)$ in coupled-channel formalism
• Relations between strong decay widths of the $P_c$ pentaquarks in the SU(4) flavor-spin model
• Molecular pentaquark states with open charm and bottom flavors
• Productions of $D_{s0}^{\ast }(2317)$ and $D_{s1}(2460)$ in $B_{(s)}$ and ${\Lambda }_b({\Xi }_b)$ decays
• Doubly-Charm and Doubly-Bottom Pentaquark molecular States via the QCD sum rules
• Molecular $P_{\psi }$ pentaquarks from light-meson exchange saturation
• Molecular states in $D_s^{(\ast )+}{\Xi }_c^{{(}^{\prime },\ast )}$ systems
• Towards modeling the short-range interactions of hidden/open charm pentaquark molecular states
• Possible molecules of triple-heavy pentaquarks within the extended local hidden gauge formalism
• Observation of ${\Lambda }_b^0\to {\Lambda }_c^{+}{\bar{D}}^{(\ast )0}{K}^{-}$ and ${\Lambda }_b^0\to {\Lambda }_c^{+}{D}_s^{\ast -}$ decays
• Strong decays of $P_{\psi }^N(4440{)}^{+}$ and $P_{\psi }^N(4457{)}^{+}$ within the Bethe-Salpeter framework
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