Doubly Charmed Pentaquarks

Abstract

The LHCb Collaboration, using its full data set from runs $1$ and $2$, announced in $2019$ a surprising update of the hidden-charm pentaquark states $P_c(4380{)}^{+}$ and $P_c(4450{)}^{+}$, observed in 2015. A new state, $P_c(4312{)}^{+}$, was clearly seen at lower energies; furthermore, the original $P_c(4450)$ resonance was resolved into two individual states, named the $P_c(4440{)}^{+}$ and the $P_c(4457{)}^{+}$. Motivated by the fact that these new hidden-charm pentaquark states were successfully predicted by our chiral quark model, we extend herein such study to the doubly charmed sector. The analyzed total spin and parity quantum numbers are $J^P={\frac{1}{2}}^{-}$, ${\frac{3}{2}}^{-}$ and ${\frac{5}{2}}^{-}$, in the $I=\frac{1}{2}$ and $\frac{3}{2}$ isospin channels. We find several possible narrow baryon-meson resonances (theoretical masses in parenthesis): $I{J}^P=\frac{1}{2}{\frac{1}{2}}^{-}$ ${\Sigma }_{c}D(4356)$, $\frac{1}{2}{\frac{3}{2}}^{-}$ ${\Sigma }_c^{\ast }D(4449)$, $\frac{3}{2}{\frac{1}{2}}^{-}$ ${\Sigma }_{c}D(4431)$, $\frac{3}{2}{\frac{1}{2}}^{-}$ ${\Sigma }_{c}D(4446)$, $\frac{3}{2}{\frac{3}{2}}^{-}$ ${\Sigma }_c{D}^{\ast }(4514)$ and $\frac{3}{2}{\frac{5}{2}}^{-}$ ${\Xi }_{cc}^{\ast }\rho (4461)$ whose widths are $4.8$, $8.0$, $2.6$, $2.2$, $4.0$ and $3.0\text{MeV}$, respectively. Moreover, one shallow bound-state is found, too, with quantum numbers $I{J}^P=\frac{1}{2}{\frac{3}{2}}^{-}$ ${\Xi }_{cc}^{\ast }\pi (3757)$. These doubly charmed pentaquark states are expected to be identified in future experiments.

arXiv comment15 pages, 14 Tables, 11 Figures. arXiv admin note: text overlap with arXiv:1809.06193

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Cited by in corpus (23)

• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Tetra- and penta-quark structures in the constituent quark model
• Coupled-channel effects of the ${\Sigma }_c^{(\ast )}{\bar{D}}^{(\ast )}$-${\Lambda }_c(2595)\bar{D}$ system and molecular nature of the $P_c$ pentaquark states from one-boson exchange model
• Magnetic dipole moments of the hidden-charm pentaquark states: $P_c(4440)$, $P_c(4457)$ and $P_{cs}(4459)$
• Exotic resonances of fully-heavy tetraquarks in a lattice-QCD insipired quark model
• Doubly charmed molecular pentaquarks
• The $\mathbf{sQ}\bar{\mathbf{q}}\bar{\mathbf{q}}$ $(\mathbf{q}=\mathbf{u},\mathbf{d};\mathbf{Q}=\mathbf{c},\mathbf{b})$ tetraquarks in the chiral quark model
• Hidden-charm tetraquarks with strangeness in the chiral quark model
• $QQ\bar{s}\bar{s}$ tetraquarks in the chiral quark model
• Spectrum of the doubly charmed molecular pentaquarks in chiral effective field theory
• Spectrum of the molecular pentaquarks
• Electromagnetic properties of doubly heavy pentaquark states
• Peaks within peaks and the possible two-peak structure of the Pc(4457): the effective field theory perspective
• Anticharmed strange pentaquarks from the one-boson-exchange model
• Fully-charm and -bottom pentaquarks in a Lattice-QCD inspired quark model
• Towards the discovery of novel $B_c$ states: radiative and hadronic transitions
• Doubly charmed pentaquark states in QCD sum rules
• The $\mathbf{X}(3872)$'s excitation and its connection with production at hadron colliders
• Bottomonium-like tetraquarks in a chiral quark model
• Search for prompt production of pentaquarks in charm hadron final states
• Doubly-Charm and Doubly-Bottom Pentaquark molecular States via the QCD sum rules
• Prediction of five-flavored pentaquarks
• Doubly-charmed pentaquark states in a mass splitting model