Predictions of two states in u d-bar s cc, three in u d-bar s cb, and four in u d-bar s bb sectors plus virtual states, obtained via unitary coupled channels with off-diagonal binding dominance.
The $\Lambda_{b}\rightarrow J/\psi K^{0}\Lambda$ reaction and a hidden-charm pentaquark state with strangeness
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abstract
We study the $\Lambda_{b}\rightarrow J/\psi K^{0}\Lambda$ reaction considering both the $K^{0}\Lambda$ interaction with its coupled channels and the $J/\psi\Lambda$ interaction. The latter is described by taking into account the fact that there are predictions for a hidden-charm state with strangeness that couples to $J/\psi\Lambda$. By using the coupling of the resonance to $J/\psi\Lambda$ from these predictions we show that a neat peak can be observed in the $J/\psi\Lambda$ invariant mass distribution, rather stable under changes of unknown magnitudes. In some cases, one finds a dip structure associated to that state, but a signal of the state shows up in the $J/\psi$ spectrum.
fields
hep-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
The chiral unitary calculation predicts a narrow peak from N(1535) in the pi+ n invariant mass spectrum and a dip from Lambda(1670) in the K0bar n spectrum, supporting the molecular interpretation of these resonances.
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Predicted Exotic Doubly Heavy-Strange Pentaquarks
Predictions of two states in u d-bar s cc, three in u d-bar s cb, and four in u d-bar s bb sectors plus virtual states, obtained via unitary coupled channels with off-diagonal binding dominance.
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Probing the isospin structure and low-lying resonances in $\Lambda_c^+ \to n\bar{K}^0 \pi^+$ decays
The chiral unitary calculation predicts a narrow peak from N(1535) in the pi+ n invariant mass spectrum and a dip from Lambda(1670) in the K0bar n spectrum, supporting the molecular interpretation of these resonances.