Bottomonium-like tetraquarks in a chiral quark model

Abstract

The low-lying bottomonium-like tetraquarks $b\bar{b}q\bar{q}$ $(q=u,d,s)$ with spin-parity $J^P=0^{+}$, $1^{+}$ and $2^{+}$, and isospin $I=0,1$ or $\frac{1}{2}$, are systematically investigated within the theoretical framework of real- and complex-scaling range of a chiral quark model, which has already been successfully applied in analysis of several multiquark systems. A complete four-body $S$-wave function, which includes meson-meson, diquark-antidiquark and K-type arrangements of quarks, along with all possible color configurations are considered. In the $b\bar{b}q\bar{q}$ $(q=u,d)$ tetraquark system, we found resonance states of $B^{(\ast )}{\bar{B}}^{(\ast )}$, ${\rm Y}\omega$, ${\rm Y}\rho$ and ${\eta }_b\rho$ nature with all possible $I(J^P)$ quantum numbers. Their masses are generally located in the energy range $11.0-11.3$ GeV and their widths are less than $10$ MeV. In addition, extremely narrow resonances, with two-meson strong decay widths less than $1.5$ MeV, are obtained in both $b\bar{b}u\bar{s}$ and $b\bar{b}s\bar{s}$ tetraquark systems. Particularly, four radial excitations of ${\rm Y}{K}^{\ast }$ and ${\eta }_b{K}^{\ast }$ are found at $\sim 11.1$ GeV in $J^P=0^{+}$, $1^{+}$ and $2^{+}$ channels of $b\bar{b}u\bar{s}$ system. One ${\rm Y}(1S)\varphi (2S)$ resonance state is obtained at $11.28$ GeV in the $J^P=1^{+}$ sector.

19 pages, 16 tables and 13 figures. arXiv admin note: substantial text overlap with arXiv:2101.04933, arXiv:2109.04311

References in corpus (25)

• Pentaquark and Tetraquark states
• Observation of a narrow pentaquark state, $P_c(4312{)}^{+}$, and of two-peak structure of the $P_c(4450{)}^{+}$
• Observation of an exotic narrow doubly charmed tetraquark
• Constituent quark model study of the meson spectra
• Study of the doubly charmed tetraquark $T_{cc}^{+}$
• A survey of heavy-heavy hadronic molecules
• Observation of a near-threshold structure in the $K^{+}$ recoil-mass spectra in $e^{+}{e}^{-}\to K^{+}(D_s^{-}{D}^{\ast 0}+D_s^{\ast -}{D}^0)$
• Explaining the Many Threshold Structures in the Heavy-Quark Hadron Spectrum
• Evidence for a new structure in the $J/\psi p$ and $J/\psi \bar{p}$ systems in $B_s^0\to J/\psi p\bar{p}$ decays
• Doubly-heavy tetraquarks
• Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV
• Study of the $B{\bar{B}}^{\ast }/D{\bar{D}}^{\ast }$ bound states in a Bethe-Salpeter approach
• Study of $B{\bar{B}}^{\ast }$ and $B^{\ast }{\bar{B}}^{\ast }$ interactions in $I=1$ and relationship to the $Z_b(10610)$, $Z_b(10650)$ states
• Charmonium resonances in the 3.9 GeV/$c^2$ energy region and the $X(3915)/X(3930)$ puzzle
• Canonical description of the new LHCb resonances
• Charmed-strange Meson Spectrum: Old and New Problems
• Threshold effects in P-wave bottom-strange mesons
• Hidden-charm tetraquarks with strangeness in the chiral quark model
• $QQ\bar{s}\bar{s}$ tetraquarks in the chiral quark model
• Masses and widths of the exotic molecular $B_{(s)}^{(\ast )}{B}_{(s)}^{(\ast )}$ states
• $Z_b(10610)$ and $Z_b^{\prime }(10650)$ decays in a covariant quark model
• Study of $B_s^0\to J/\psi {\pi }^{+}{\pi }^{-}{K}^{+}{K}^{-}$ decays
• Tetraquark systems $\bar{b}b\bar{d}u$ in the static limit and lattice QCD
• The $Z_b$ structures in a constituent quark model coupled-channels calculation
• Composite nature of $Z_b$ states from data analysis

Cited by in corpus (2)

• Spectrum of the S-wave fully-heavy tetraquark states
• Insights into the exotic charged states $Z_b(10610)$ and $Z_b(10650)$ from their photoproduction off nuclei