AI 中文总结
利用Bethe-Salpeter形式论结合单玻色子交换相互作用，研究了四类重味介子系统的S波束缚态，得到了同位旋标量隐重味、双重重系统的部分束缚态解，发现底系统比粲系统更易形成束缚态。
AI 中文摘要
我们利用单玻色子交换相互作用，在Bethe-Salpeter形式论框架下研究$D^\bar D^\bar$、$B^\bar B^\bar$、$D^\bar D^\bar$和$\bar B^\bar B^\bar$系统中可能的S波束缚态。在同位旋标量隐重味系统中，获得了$J^{PC}=0^{++}$、$1^{+-}$和$2^{++}$的束缚态解，而在所考虑的参数范围内未发现同位旋矢量解。对于双重重系统，在允许的$I(J^P)=0(1^+)$、$1(0^+)$和$1(2^+)$系统中获得了解，尽管$1(0^+)$解需要相对较大的截断参数。由于底系统的约化质量更大，其比粲系统更易形成束缚态。
英文摘要
We investigate possible $S$-wave bound states in the $D^\ast\bar D^\ast$, $B^\ast\bar B^\ast$, $D^\ast D^\ast$, and $\bar B^\ast\bar B^\ast$ systems within the Bethe-Salpeter formalism using one-boson-exchange interactions. Bound state solutions are obtained in the isoscalar hidden-heavy systems with $J^{PC}=0^{++}$, $1^{+-}$, and $2^{++}$, whereas no isovector solutions are found within the parameter range considered. For the doubly heavy systems, solutions are obtained in the allowed $I(J^P)=0(1^+)$, $1(0^+)$, and $1(2^+)$ systems, although the $1(0^+)$ solution requires a comparatively large cutoff parameter. The bottom systems are bounded more favorably than their charmed counterparts because of their larger reduced masses.
