Structure and decays of hidden heavy pentaquarks

Abstract

We study the hadronic molecular structure of hidden heavy pentaquarks - new exotic states composed of charmed/bottom baryons and $D(D^{\ast })/B(B^{\ast })$ mesons. Based on the observation of three pentaquark candidates $P_c^{+}(4312)$, $P_c^{+}(4440)$, and $P_c^{+}(4457)$ by the LHCb Collaboration we consider the classification of possible flavor partners composed of charmed baryons and $D(D^{\ast })$ mesons within the hadronic molecular approach. We extend this classification to the bottom sector. Using phenomenological Lagrangians we construct baryon-meson bound states governed by the Weinberg-Salam compositeness condition. As an application we consider strong two-body decays of the new exotic states into a light baryon and $V=J/\psi ,{\rm Y}$ or $P={\eta }_c,{\eta }_b$ mesons. Results are presented in the heavy quark limit.

References in corpus (35)

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Cited by in corpus (16)

• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Interpretation of the LHCb $P_c$ States as Hadronic Molecules and Hints of a Narrow $P_c(4380)$
• Coupled-channel effects of the ${\Sigma }_c^{(\ast )}{\bar{D}}^{(\ast )}$-${\Lambda }_c(2595)\bar{D}$ system and molecular nature of the $P_c$ pentaquark states from one-boson exchange model
• Strong decays of the newly $P_{cs}(4459)$ as a strange hidden-charm ${\Xi }_c{\bar{D}}^{\ast }$ molecule
• Production of $P_c$ states in ${\Lambda }_b$ decays
• Experimental constraints on the properties of $P_c$ states
• Investigation of hidden-charm double strange pentaquark candidate $P_{css}$ via its mass and strong decays
• Hidden-charm pentaquark states in a mass splitting model
• Investigation of a candidate spin-$\frac{1}{2}$ hidden-charm triple strange pentaquark state $P_{csss}$
• Unravelling Pentaquarks with Born--Oppenheimer effective theory
• Hidden-Bottom Pentaquarks: Mass Spectrum, Magnetic Moments and Partial Widths
• Molecular pentaquark states with open charm and bottom flavors
• Strong decays of the $P_c(4312)$ and its isospin cousin via the QCD sum rules
• Hadronic molecules and multiquark states
• Molecular pentaquarks composed of a ground-state octet baryon and a $P-$wave anticharmed meson
• $P_c(4312{)}^{+}$ and $P_c(4337{)}^{+}$ as interfering ${\Sigma }_c\bar{D}$ and ${\Lambda }_c{\bar{D}}^{\ast }$ threshold cusps