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.
Identifying exotic hidden-charm pentaquarks
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abstract
The LHCb Collaboration at the Large Hadron Collider at CERN discovered two pentaquark states $P_c(4380)$ and $P_c(4450)$. These two hidden-charm states are interpreted as the loosely bound $\Sigma_c(2455)D^*$ and $\Sigma_c^*(2520)D^*$ molecular states in the boson exchange interaction model, which provides an explanation for why the experimental width of $P_c(4450)$ is much narrower than that of $P_c(4380)$. The discovery of the new resonances $P_c(4380)$ and $P_c(4450)$, indeed, opens a new page for hadron physics. The partners of $P_c(4380)$ and $P_c(4450)$ should be pursued in future experiments.
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The M1 radiative decay width Pc(4457)(3/2-) → Pc(4312)(1/2-)γ is computed as 6.7 keV (range 2-9 keV) via 19 triangle loops with photon coupling to molecular components.
Strange hidden-charm pentaquarks modeled as diquark-triquark bound states yield masses between 4200-4590 MeV for S-waves, with P_c cs(4459) assigned as a 3/2- state and P_c cs(4338) as a 1/2- state, plus a predicted lowest 1/2- state at 4200 MeV.
citing papers explorer
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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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Radiative decays of dynamically generated pentaquarks in the chiral unitary approach: the $P_c(4457)\to P_c(4312)\,\gamma$ transition
The M1 radiative decay width Pc(4457)(3/2-) → Pc(4312)(1/2-)γ is computed as 6.7 keV (range 2-9 keV) via 19 triangle loops with photon coupling to molecular components.
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$P_{c\bar cs}(4459)^{0}$, $P_{c\bar c s}(4338)^0$ and mass spectrum of strange hidden-charm pentaquarks
Strange hidden-charm pentaquarks modeled as diquark-triquark bound states yield masses between 4200-4590 MeV for S-waves, with P_c cs(4459) assigned as a 3/2- state and P_c cs(4338) as a 1/2- state, plus a predicted lowest 1/2- state at 4200 MeV.