Doubly-Charm and Doubly-Bottom Pentaquark molecular States via the QCD sum rules

Abstract

In the present work, the doubly-charm and doubly-bottom pentaquark molecular states $D^{(\ast )}{\Sigma }_c^{(\ast )}$ and $B^{(\ast )}{\Sigma }_b^{(\ast )}$ are studied via the QCD sum rules. Sixteen color singlet-singlet type currents with the definite isospin-spin-parity $I{J}^P$ are constructed to interpolate the corresponding hadronic states with the same quantum numbers. The masses and pole residues of those doubly-heavy pentaquark molecular states are calculated, the results show that their masses are all below the corresponding meson-baryon thresholds, which means that they are possible bound states, not resonant states, moreover, the possible decay channels for the doubly-charm molecular states are given.

12 pages, 10 figures

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Cited by in corpus (3)

• Towards modeling the short-range interactions of hidden/open charm pentaquark molecular states
• Electromagnetic characteristics as probes into the inner structures of the predicted ${\Xi }_c^{{(}^{\prime },\ast )}{D}_s^{(\ast )}$ molecular states
• Doubly-charmed pentaquark states in a mass splitting model