Production mechanism of hidden-charm pentaquark states $P_{c\bar{c}s}$ with strangeness $S=-1$

Abstract

We investigate the hidden-charm pentaquark states with strangeness $S=-1$ ($P_{c\bar{c}s}$) within an off-shell coupled-channel approach based on effective Lagrangians that respect heavy-quark spin symmetry, SU(3) flavor symmetry, and hidden local symmetry. All relevant meson-baryon two-body channels composed of low-lying anti-charmed mesons and singly-charmed baryons with $S=-1$, as well as the $J/\psi \Lambda$ channel, are included. We find a total of eleven negative-parity states and three positive-parity states. Among the negative-parity states, the $P_{c\bar{c}s}(4338)$ and $P_{c\bar{c}s}(4459)$ can possibly be interpreted as $\bar{D}{\Xi }_c$ and ${\bar{D}}^{\ast }{\Xi }_c$ molecular states, respectively. We identify a second state, $P_{c\bar{c}s}(4472)$, located close to the $P_{c\bar{c}s}(4459)$ but with different spin and width, which may correspond to the structure observed by the Belle Collaboration. Both states are generated from the ${\bar{D}}^{\ast }{\Xi }_c$ channel and can be interpreted as spin partners. Their properties are consistent with recent experimental observations, providing strong support for the molecular interpretation of the $P_{c\bar{c}s}$ states. We also observe a two-pole structure near the ${\bar{D}}_s^{\ast }{\Lambda }_c$ and $\bar{D}{\Xi }_c^{{}^{\prime }}$ thresholds, and find virtual and resonance states in the ${\bar{D}}^{\ast }{\Xi }_c^{{}^{\prime }}$ channel depending on spin-parity.

arXiv comment19 pages and 8 figures. The title was changed and a few paragraphs were added. The final version for publication in Physical Review D

References in corpus (29)

• Observation of $J/\psi p$ resonances consistent with pentaquark states in ${\Lambda }_b^0\to J/\psi K^{-}p$ decays
• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• Phenomenology of Heavy Meson Chiral Lagrangians
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Chiral Dynamics of the Two Λ(1405) States
• Prediction of narrow $N^{\ast }$ and ${\Lambda }^{\ast }$ resonances with hidden charm above 4 GeV
• Chiral Multiplets of Heavy-Light Mesons
• Evidence of a $J/\psi \Lambda$ structure and observation of excited ${\Xi }^{-}$ states in the ${\Xi }_b^{-}\to J/\psi \Lambda K^{-}$ decay
• Strong LHCb evidence supporting the existence of the hidden-charm molecular pentaquarks
• Charming penguins in B => K* pi, K (rho,omega,phi) decays
• First measurement of near-threshold J/$\psi$ exclusive photoproduction off the proton
• Nonfactorizable contributions in B decays to charmonium: the case of $B^{-}\to K^{-}{h}_c$
• Observation of a $J/\psi \Lambda$ resonance consistent with a strange pentaquark candidate in $B^{-}\to J/\psi \Lambda \bar{p}$ decays
• ${\Lambda }_{c}N$ bound states revisited
• Evidence for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems in $B_s^0\to J/\psi p\bar{p}$ decays
• Prediction of hidden charm strange molecular baryon states with heavy quark spin symmetry
• Spectrum of the strange hidden charm molecular pentaquarks in chiral effective field theory
• Two-pole structures in QCD: Facts, not fantasy!
• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
• New strange pentaquarks
• Electromagnetic form factors of singly heavy baryons in the self-consistent SU(3) chiral quark-soliton model
• Hidden Charm Pentaquark $P_c(4380)$ and Doubly Charmed Baryon ${\Xi }_{cc}^{\ast }(4380)$ as Hadronic Molecule States
• Hidden charm pentaquark states in a diquark model
• Hadronic Transitions among Quarkonium States in a Soft-Exchange-Approximation. Chiral Breaking and Spin Symmetry Breaking Processes
• Electromagnetic transitions of the singly charmed baryons with spin 3/2
• The LHCb state $P_{\psi s}^{\Lambda }(4338)$ as a triangle singularity
• $P_{\psi s}^{\Lambda }(4459)$ and $P_{\psi s}^{\Lambda }(4338)$ as molecular states in $J/\psi \Lambda$ invariant mass spectra
• Hidden-charm pentaquark states in a mass splitting model
• Observation of the ${\Lambda }_{\text{b}}^0$ $\to$ J/$\psi {\Xi }^{-}$K${}^{+}$ decay

Cited by in corpus (2)

• Triple-strangeness hidden-charm pentaquarks
• Analysis of the hidden-charm pentaquark candidates in the $J/\psi p$ mass spectrum with QCD sum rules