Spectrum of the molecular pentaquarks

Abstract

We investigate the mass spectrum of the molecular pentaquarks composed of a baryon and a meson. We establish the underlying relations among the near-threshold interactions of the molecular tetraquark and pentaquark systems. We find the existence of the molecule candidates in the ${\Sigma }_c{\bar{D}}^{(\ast )}$, $D{D}^{\ast }$, and $D{\bar{D}}^{\ast }$ systems indicates a substantial presence of the hadronic molecules in the {\it heavy} baryon plus {\it heavy} meson systems ({\it heavy} refers to the hadrons with the $c$ and/or $s$ quarks). We make an exhaustive prediction of the possible bound/virtual molecular states in the systems: ${\Sigma }_c^{(\ast )}{\bar{D}}^{(\ast )}$, ${\Sigma }_c^{(\ast )}{D}^{(\ast )}$, ${\Xi }_c^{(\prime ,\ast )}{\bar{D}}^{(\ast )}$, ${\Xi }_c^{(\prime ,\ast )}{D}^{(\ast )}$, ${\Sigma }_c^{(\ast )}{K}^{\ast }$, ${\Sigma }_c^{(\ast )}{\bar{K}}^{\ast }$, ${\Xi }_c^{(\prime ,\ast )}{K}^{\ast }$, ${\Xi }_c^{(\prime ,\ast )}{\bar{K}}^{\ast }$, ${\Xi }_{cc}^{(\ast )}{\bar{D}}^{(\ast )}$, ${\Xi }_{cc}^{(\ast )}{D}^{(\ast )}$, ${\Xi }_{cc}^{(\ast )}{K}^{\ast }$, ${\Xi }_{cc}^{(\ast )}{\bar{K}}^{\ast }$, ${\Sigma }^{(\ast )}{\bar{D}}^{(\ast )}$, ${\Sigma }^{(\ast )}{D}^{(\ast )}$, ${\Xi }^{(\ast )}{\bar{D}}^{(\ast )}$, ${\Xi }^{(\ast )}{D}^{(\ast )}$, ${\Sigma }^{(\ast )}{K}^{\ast }$, ${\Sigma }^{(\ast )}{\bar{K}}^{\ast }$, ${\Xi }^{(\ast )}{K}^{\ast }$, ${\Xi }^{(\ast )}{\bar{K}}^{\ast }$. Hunting for the predicted states in experiments will significantly deepen our understanding of the formation mechanism of the hadronic molecules, and shed light on the manifestation of flavor symmetry in the low-energy residual strong interactions.

16 pages, 4 figures, and 8 tables

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• Pentaquark and Tetraquark states
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• Mass behavior of hidden-charm pentaquarks with open-strange inspired by these established $P_c$ molecular states
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• Surveying the mass spectra and the electromagnetic properties of the ${\Xi }_c^{(\prime ,\ast )}{D}^{(\ast )}$ molecular pentaquarks
• The singly-charmed pentaquark molecular states via the QCD sum rules
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Cited by in corpus (12)

• Spectrum of the molecular hexaquarks
• Exploring the mass spectrum and the electromagnetic properties of the possible ${\Xi }_{cc}{K}^{(\ast )}$ and ${\Xi }_{cc}{\bar{K}}^{(\ast )}$ molecules
• Towards modeling the short-range interactions of hidden/open charm pentaquark molecular states
• A Simple Model of Pentaquarks
• Pole analysis for the $D^{\ast }\bar{K}$-$D\overline{K^{\ast }}$ coupled-channel system
• Electromagnetic characteristics as probes into the inner structures of the predicted ${\Xi }_c^{{(}^{\prime },\ast )}{D}_s^{(\ast )}$ molecular states
• Hidden charm ${\mathcal{P}}_{cs}(4338{)}^0$ production in baryonic $B^{-}\to J/\psi \Lambda \bar{p}$ decay
• Strong decays of the $P_{cs}(4338)$ and its high isospin cousin via the QCD sum rules
• A coupled-channel perspective analysis on bottom-strange molecular pentaquarks
• Doubly-charmed pentaquark states in a mass splitting model
• Octet baryon and heavy meson interactions in chiral effective field theory
• Strong decays of the isovector-scalar $D^{\ast }{\bar{D}}^{\ast }$ hadronic molecule