${B}^{* } \to \overline{D}D$ decays with perturbative QCD approach

Nonleptonic two-body weak decays are studied phenomenologically with a perturbative QCD factorization approach. It is found that the , and decays have branching ratios 10−9, and might be promisingly measurable in the running of LHC and forthcoming SuperKEKB experiments in the future.