AI 中文总结
该研究利用 QCD 求和规则方法计算全粲张量四夸克\(T = bb\overline{b}\overline{b}\)的参数，通过两点求和规则评估其质量和耦合，用三点求和规则计算衰变通道部分宽度，预测了质量和宽度，对全重共振实验研究有重要意义。
AI 中文摘要
使用 QCD 求和规则方法计算全粲张量四夸克\(T = bb\overline{b}\overline{b}\)的参数。通过两点求和规则方法评估该态的质量\(m\)和耦合\(\Lambda\)。预测质量\(m=(18530 \pm 86)~\mathrm{MeV}\)，表明\(T\)对衰变成\(\eta_b \eta_b\)和\(\Upsilon \Upsilon\)介子对是稳定的。但由于\(\overline{b}b\)湮灭成轻夸克\(\overline{q} q\)和\(\overline{s}s\)，随后产生介子\(B^{(\ast)+}B^{( \ast)-}\)、\(B^{(\ast)0}\overline{B}^{(\ast)0}\)和\(B_s^{(\ast)0}\overline{B} _s^{(\ast)0}\)，它会转变为常规粒子。利用三点求和规则方法的技术工具计算这些衰变通道的部分宽度。预测宽度\(\Gamma=(48 \pm 6)~\mathrm{MeV}\)，此态的质量和宽度对全重共振的实验研究有价值。
英文摘要
Parameters of the fully-beauty tensor tetraquark $ T=bb\overline{b}\overline{b}$ are computed using QCD sum rule method. The mass $m$ and coupling $Λ$ of this state are evaluated by means of two-point sum rule approach. Prediction $m=(18530 \pm 86)~\mathrm{MeV}$ for the mass demonstrates that $T$ is stable against decays to pairs of $η_b η_b$ and $ΥΥ$ mesons. But it transforms to conventional particles due to $\overline{b}b$ annihilations to light quarks $\overline{q} q $ and $\overline{s}s$ followed by creation of mesons $B^{(\ast)+}B^{( \ast)-}$, $B^{(\ast)0}\overline{B}^{(\ast)0}$ and $B_s^{(\ast)0}\overline{B} _s^{(\ast)0}$. Partial width of these decay channels are calculated by invoking technical tools of three-point sum rule method. The latter allows us to estimate strong couplings at relevant tetraquark-meson-meson vertices and, hence, a width of the process under consideration. Our prediction $ Γ=(48 \pm 6)~\mathrm{MeV}$ along with the mass of this state can be valuable for experimental studies of all-heavy resonances.
Comments9 Pages and 5 Figures
