Fully heavy pentaquark states in constituent quark model

Abstract

The LHCb collaboration reported a fully charmed tetraquark state X(6900) in the invariant mass spectrum of $J/\psi$ pairs in 2020. This discovery inspires us to further study the fully heavy pentaquark system. In this work, we investigate systematically all possible configurations for ground fully heavy pentaquark system via the variational method in the constituent quark model. According to our calculations, we further analyze the relative lengths between quarks and the contributions to the pentaquark masses from different terms of the Hamiltonian. We think no stable states exist in fully heavy pentaquark system. We hope that our study will be helpful to explore for fully heavy pentaquark states.

19 pages

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• Fully-charm and -bottom pentaquarks in a Lattice-QCD inspired quark model
• Masses and magnetic moments of exotic fully heavy pentaquarks
• DeepQuark: A Deep-Neural-Network Approach to Multiquark Bound States
• Regge Trajectories of Tetraquarks and Pentaquarks with Massive Quarks in the Flux Tube Model
• Heavy Hexaquarks in the Flux Tube Model
• Regge trajectories for the triply heavy triquarks
• $\lambda$ and $\rho$ Regge trajectories for the pentaquark $P_{cc\bar{c}bb}$ in the diquark-triquark picture
• Prospects for compact hexaquarks under the limitation imposed by quark confinement
• Systematic exploration of triply heavy tetraquarks: spectroscopic and decay characteristics