2026/08/04 by Ce Li, Jing-Juan Qi, Zhu-Feng Zhang +2
Physics and Astronomy · #hep-ph
arxiv created 2026/08/04 · arxiv updated 2026/08/05
We investigate possible S-wave bound states in the D^∗ D^∗, B^∗ B^∗, D^∗ D^∗, and B^∗ B^∗ systems within the Bethe-Salpeter formalism using one-boson-exchange interactions. Bound state solutions are obtained in the isoscalar hidden-heavy systems with JPC=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(JP)=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.