2024/10/16 by Chun-Sheng An, Jiang, Lin-Juan, Chengrong Deng +6
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Physics of Superconductivity and Magnetism #Quantum Chromodynamics and Particle Interactions #Quantum many-body systems
paper · pdf · doi:10.48550/arxiv.2410.12147
openalex publication_date 2024/10/16 · openalex created_date 2024/10/20 · openalex updated_date 2026/07/28
We perform a theoretical study on the spectrum of the low-lying hidden-bottom (qqbb with q= u, d and s) and double-bottom (qqbb) tetraquark states within a nonrelativistic quark model, in which the instanton-induced interaction is taken as the residual spin-dependent hyperfine interaction between quarks. All the model parameters are fixed by fitting the spectrum of the ground hadron states. The numerical results indicate that masses of several X_qq, Zb, and Zbs tetraquark states are below and near thresholds of corresponding meson-meson channels, thus these states may form components of exotic meson states with reasonable probabilities. Especially, in present model, masses of several obtained states with quantum number IG(JP)=1+(1+) are close to Zb^±(10610), so one may expect these states to be non-negligible components of the experimentally observed Zb states. Concerning to the double-bottom tetraquark states, the present results are in general consistent with other previous works. Two possible stable Tbb states with quark content bbnn (n=u or d quark) lying at energies 10558 MeV and 10650 MeV are found, and one possible stable bbns state is found, whose energy is ∼10687 MeV.