Spectrum of Hidden-Charm, Open-Strange Exotics in the Dynamical Diquark Model

Abstract

The observation by BESIII and LHCb of states with hidden charm and open strangeness ($c\bar{c}q\bar{s}$) presents new opportunities for the development of a global model of heavy-quark exotics. Here we extend the dynamical diquark model to encompass such states, using the same values of Hamiltonian parameters previously obtained from the nonstrange and hidden-strange sectors. The large mass splitting between $Z_{cs}(4000)$ and $Z_{cs}(4220)$ suggests substantial SU(3)${}_{\mathrm{flavor}}$ mixing between all $J^P=1^{+}$ states, while their average mass compared to that of other sectors offers a direct probe of flavor octet-singlet mixing among exotics. We also explore the inclusion of $\eta$-like exchanges within the states, and find their effects to be quite limited. In addition, using the same diquark-mass parameters, we find $P_c(4312)$ and $P_{cs}(4459)$ to fit well as corresponding nonstrange and open-strange pentaquarks.

12 pages. Version accepted for publication at Phys. Rev. D. Includes reference update

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Cited by in corpus (16)

• An updated review of the new hadron states
• Chiral perturbation theory for heavy hadrons and chiral effective field theory for heavy hadronic molecules
• Magnetic moments of the hidden-charm strange pentaquark states
• Fine Structure of Pentaquark Multiplets in the Dynamical Diquark Model
• Hidden-charm tetraquarks with strangeness in the chiral quark model
• Is $Z_{cs}(3982)$ a molecular partner of $Z_c(3900)$ and $Z_c(4020)$ states?
• Configuration mixing in strange tetraquarks $Z_{cs}$
• Production of $Z_{cs}$ in $B$ and $B_s$ decay
• $Z_{cs}$ states from the $D_s^{\ast }{\bar{D}}^{\ast }$ and $J/\psi K^{\ast }$ coupled channels: Signal in $B^{+}\to J/\psi \varphi K^{+}$ decay
• Double Exotic States Productions in Pion and Kaon Induced Reactions
• $Z_{cs}(3985)$ in next-to-leading-order chiral effective field theory -- the first truncation uncertainty analysis
• Investigating the Isospin Property of $T_{cc}^{+}$ from its Dalitz Plot Distribution
• $X$ and $Z_{cs}$ in $B^{+}\to J/\psi \varphi K^{+}$ as $s$-wave threshold cusps and alternative spin-parity assignments to $X(4274)$ and $X(4500)$
• Search for hidden-charm tetraquark with strangeness in $e^{+}{e}^{-}\to K^{+}{D}_s^{\ast -}{D}^{\ast 0}+c.c.$
• The $Z_{cs}$ states and the mixture of hadronic molecule and diquark-anti-diquark components within effective field theory
• Hunting for the heavy quark spin symmetry partner of $Z_{cs}$