LHCb pentaquarks in constituent quark models

Abstract

The recently discovered $P_c(4380{)}^{+}$ and $P_c(4450{)}^{+}$ states at LHCb have masses close to the $\bar{D}{\Sigma }_c^{\ast }$ and ${\bar{D}}^{\ast }{\Sigma }_c$ thresholds, respectively, which suggest that they may have significant meson-baryon molecular components. We analyze these states in the framework of a constituent quark model which has been applied to a wide range of hadronic observables, being the model parameters, therefore, completely constrained. The $P_c(4380{)}^{+}$ and $P_c(4450{)}^{+}$ are studied as molecular states composed by charmed baryons and open charm mesons. Several bound states with the proper binding energy are found in the $\bar{D}{\Sigma }_c^{\ast }$ and ${\bar{D}}^{\ast }{\Sigma }_c$ channels. We discuss the possible assignments of these states from their decay widths. Moreover, two more states are predicted, associated with the $\bar{D}{\Sigma }_c$ and ${\bar{D}}^{\ast }{\Sigma }_c^{\ast }$ thresholds.

5 pages, 2 tables

References in corpus (3)

• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Constituent quark model study of the meson spectra
• Quark-model study of few-baryon systems

Cited by in corpus (29)

• Hadronic molecules
• Pentaquark and Tetraquark states
• Molecular Interpretation of the $P_c(4440)$ and $P_c(4457)$ States
• Decay behaviors of Pc hadronic molecules
• Hidden-charm pentaquarks and their hidden-bottom and $B_c$-like partner states
• The baryo-quarkonium picture for hidden-charm and bottom pentaquarks and LHCb $P_{\mathrm{c}}(4380)$ and $P_{\mathrm{c}}(4450)$ states
• Nucleon Resonances with Hidden Charm in $\gamma p$ reactions
• Hidden-Bottom Pentaquarks
• The $Z_c$ structures in a coupled-channels model
• Decay behaviors of possible ${\Lambda }_{c\bar{c}}$ states in hadronic molecule pictures
• Production of $P_{cs}(4459)$ from ${\Xi }_b$ decay
• Strange hidden-charm $P_{\psi s}^{\Lambda }(4459)$ and $P_{\psi s}^{\Lambda }(4338)$ pentaquarks and additional $P_{\psi s}^{\Lambda }$, $P_{\psi s}^{\Sigma }$ and $P_{\psi ss}^N$ candidates in a quark model approach
• Hidden Charm Pentaquark $P_c(4380)$ and Doubly Charmed Baryon ${\Xi }_{cc}^{\ast }(4380)$ as Hadronic Molecule States
• Strong Decay of $P_c(4380)$ Pentaquark in a Molecular Picture
• Electromagnetic multipole moments of the $P_c^{+}(4380)$ pentaquark in light-cone QCD
• Experimental constraints on the properties of $P_c$ states
• Resonances in heavy meson - heavy baryon coupled-channel interactions
• Heavy quark spin multiplet structure of $P_c$-like pentaquark as P-wave hadronic molecular state
• Exotic pentaquark states with the $qqQQ\bar{Q}$ configuration
• The $Z_b$ structures in a constituent quark model coupled-channels calculation
• Hidden charm pentaquark and $\Lambda (1405)$ in the ${\Lambda }_b^0\to {\eta }_c{K}^{-}p(\pi \Sigma )$ reaction
• Double Exotic States Productions in Pion and Kaon Induced Reactions
• Heavy quark spin multiplet structure of ${\bar{P}}^{(\ast )}{\Sigma }_Q^{(\ast )}$ molecular states
• $J/\psi N$ interactions revisited and ${\Lambda }_b^0\to J/\psi K^{-}({\pi }^{-})p$ decays
• Energy loss as the origin of an universal scaling law of the elliptic flow
• $P_c(4457)$ interpreted as a $J^P=1/2^{+}$ state by ${\bar{D}}^0{\Lambda }_c^{+}(2595)$-${\pi }^0{P}_c(4312)$ interaction
• Production of single-charmed baryons in a quark model approach
• Threshold effects in hadron spectrum: a new spectroscopy?
• Exotic hadrons associated with $b$-quark